1 //===-- X86ISelLowering.cpp - X86 DAG Lowering Implementation -------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the interfaces that X86 uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #include "X86ISelLowering.h"
16 #include "Utils/X86ShuffleDecode.h"
17 #include "X86CallingConv.h"
18 #include "X86InstrBuilder.h"
19 #include "X86MachineFunctionInfo.h"
20 #include "X86TargetMachine.h"
21 #include "X86TargetObjectFile.h"
22 #include "llvm/ADT/SmallSet.h"
23 #include "llvm/ADT/Statistic.h"
24 #include "llvm/ADT/StringExtras.h"
25 #include "llvm/ADT/StringSwitch.h"
26 #include "llvm/ADT/VariadicFunction.h"
27 #include "llvm/CodeGen/IntrinsicLowering.h"
28 #include "llvm/CodeGen/MachineFrameInfo.h"
29 #include "llvm/CodeGen/MachineFunction.h"
30 #include "llvm/CodeGen/MachineInstrBuilder.h"
31 #include "llvm/CodeGen/MachineJumpTableInfo.h"
32 #include "llvm/CodeGen/MachineModuleInfo.h"
33 #include "llvm/CodeGen/MachineRegisterInfo.h"
34 #include "llvm/IR/CallSite.h"
35 #include "llvm/IR/CallingConv.h"
36 #include "llvm/IR/Constants.h"
37 #include "llvm/IR/DerivedTypes.h"
38 #include "llvm/IR/Function.h"
39 #include "llvm/IR/GlobalAlias.h"
40 #include "llvm/IR/GlobalVariable.h"
41 #include "llvm/IR/Instructions.h"
42 #include "llvm/IR/Intrinsics.h"
43 #include "llvm/MC/MCAsmInfo.h"
44 #include "llvm/MC/MCContext.h"
45 #include "llvm/MC/MCExpr.h"
46 #include "llvm/MC/MCSymbol.h"
47 #include "llvm/Support/CommandLine.h"
48 #include "llvm/Support/Debug.h"
49 #include "llvm/Support/ErrorHandling.h"
50 #include "llvm/Support/MathExtras.h"
51 #include "llvm/Target/TargetOptions.h"
57 #define DEBUG_TYPE "x86-isel"
59 STATISTIC(NumTailCalls, "Number of tail calls");
61 static cl::opt<bool> ExperimentalVectorWideningLegalization(
62 "x86-experimental-vector-widening-legalization", cl::init(false),
63 cl::desc("Enable an experimental vector type legalization through widening "
64 "rather than promotion."),
67 static cl::opt<bool> ExperimentalVectorShuffleLowering(
68 "x86-experimental-vector-shuffle-lowering", cl::init(false),
69 cl::desc("Enable an experimental vector shuffle lowering code path."),
72 // Forward declarations.
73 static SDValue getMOVL(SelectionDAG &DAG, SDLoc dl, EVT VT, SDValue V1,
76 static SDValue ExtractSubVector(SDValue Vec, unsigned IdxVal,
77 SelectionDAG &DAG, SDLoc dl,
78 unsigned vectorWidth) {
79 assert((vectorWidth == 128 || vectorWidth == 256) &&
80 "Unsupported vector width");
81 EVT VT = Vec.getValueType();
82 EVT ElVT = VT.getVectorElementType();
83 unsigned Factor = VT.getSizeInBits()/vectorWidth;
84 EVT ResultVT = EVT::getVectorVT(*DAG.getContext(), ElVT,
85 VT.getVectorNumElements()/Factor);
87 // Extract from UNDEF is UNDEF.
88 if (Vec.getOpcode() == ISD::UNDEF)
89 return DAG.getUNDEF(ResultVT);
91 // Extract the relevant vectorWidth bits. Generate an EXTRACT_SUBVECTOR
92 unsigned ElemsPerChunk = vectorWidth / ElVT.getSizeInBits();
94 // This is the index of the first element of the vectorWidth-bit chunk
96 unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits()) / vectorWidth)
99 // If the input is a buildvector just emit a smaller one.
100 if (Vec.getOpcode() == ISD::BUILD_VECTOR)
101 return DAG.getNode(ISD::BUILD_VECTOR, dl, ResultVT,
102 makeArrayRef(Vec->op_begin()+NormalizedIdxVal,
105 SDValue VecIdx = DAG.getIntPtrConstant(NormalizedIdxVal);
106 SDValue Result = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, ResultVT, Vec,
112 /// Generate a DAG to grab 128-bits from a vector > 128 bits. This
113 /// sets things up to match to an AVX VEXTRACTF128 / VEXTRACTI128
114 /// or AVX-512 VEXTRACTF32x4 / VEXTRACTI32x4
115 /// instructions or a simple subregister reference. Idx is an index in the
116 /// 128 bits we want. It need not be aligned to a 128-bit bounday. That makes
117 /// lowering EXTRACT_VECTOR_ELT operations easier.
118 static SDValue Extract128BitVector(SDValue Vec, unsigned IdxVal,
119 SelectionDAG &DAG, SDLoc dl) {
120 assert((Vec.getValueType().is256BitVector() ||
121 Vec.getValueType().is512BitVector()) && "Unexpected vector size!");
122 return ExtractSubVector(Vec, IdxVal, DAG, dl, 128);
125 /// Generate a DAG to grab 256-bits from a 512-bit vector.
126 static SDValue Extract256BitVector(SDValue Vec, unsigned IdxVal,
127 SelectionDAG &DAG, SDLoc dl) {
128 assert(Vec.getValueType().is512BitVector() && "Unexpected vector size!");
129 return ExtractSubVector(Vec, IdxVal, DAG, dl, 256);
132 static SDValue InsertSubVector(SDValue Result, SDValue Vec,
133 unsigned IdxVal, SelectionDAG &DAG,
134 SDLoc dl, unsigned vectorWidth) {
135 assert((vectorWidth == 128 || vectorWidth == 256) &&
136 "Unsupported vector width");
137 // Inserting UNDEF is Result
138 if (Vec.getOpcode() == ISD::UNDEF)
140 EVT VT = Vec.getValueType();
141 EVT ElVT = VT.getVectorElementType();
142 EVT ResultVT = Result.getValueType();
144 // Insert the relevant vectorWidth bits.
145 unsigned ElemsPerChunk = vectorWidth/ElVT.getSizeInBits();
147 // This is the index of the first element of the vectorWidth-bit chunk
149 unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits())/vectorWidth)
152 SDValue VecIdx = DAG.getIntPtrConstant(NormalizedIdxVal);
153 return DAG.getNode(ISD::INSERT_SUBVECTOR, dl, ResultVT, Result, Vec,
156 /// Generate a DAG to put 128-bits into a vector > 128 bits. This
157 /// sets things up to match to an AVX VINSERTF128/VINSERTI128 or
158 /// AVX-512 VINSERTF32x4/VINSERTI32x4 instructions or a
159 /// simple superregister reference. Idx is an index in the 128 bits
160 /// we want. It need not be aligned to a 128-bit bounday. That makes
161 /// lowering INSERT_VECTOR_ELT operations easier.
162 static SDValue Insert128BitVector(SDValue Result, SDValue Vec,
163 unsigned IdxVal, SelectionDAG &DAG,
165 assert(Vec.getValueType().is128BitVector() && "Unexpected vector size!");
166 return InsertSubVector(Result, Vec, IdxVal, DAG, dl, 128);
169 static SDValue Insert256BitVector(SDValue Result, SDValue Vec,
170 unsigned IdxVal, SelectionDAG &DAG,
172 assert(Vec.getValueType().is256BitVector() && "Unexpected vector size!");
173 return InsertSubVector(Result, Vec, IdxVal, DAG, dl, 256);
176 /// Concat two 128-bit vectors into a 256 bit vector using VINSERTF128
177 /// instructions. This is used because creating CONCAT_VECTOR nodes of
178 /// BUILD_VECTORS returns a larger BUILD_VECTOR while we're trying to lower
179 /// large BUILD_VECTORS.
180 static SDValue Concat128BitVectors(SDValue V1, SDValue V2, EVT VT,
181 unsigned NumElems, SelectionDAG &DAG,
183 SDValue V = Insert128BitVector(DAG.getUNDEF(VT), V1, 0, DAG, dl);
184 return Insert128BitVector(V, V2, NumElems/2, DAG, dl);
187 static SDValue Concat256BitVectors(SDValue V1, SDValue V2, EVT VT,
188 unsigned NumElems, SelectionDAG &DAG,
190 SDValue V = Insert256BitVector(DAG.getUNDEF(VT), V1, 0, DAG, dl);
191 return Insert256BitVector(V, V2, NumElems/2, DAG, dl);
194 static TargetLoweringObjectFile *createTLOF(const Triple &TT) {
195 if (TT.isOSBinFormatMachO()) {
196 if (TT.getArch() == Triple::x86_64)
197 return new X86_64MachoTargetObjectFile();
198 return new TargetLoweringObjectFileMachO();
202 return new X86LinuxTargetObjectFile();
203 if (TT.isOSBinFormatELF())
204 return new TargetLoweringObjectFileELF();
205 if (TT.isKnownWindowsMSVCEnvironment())
206 return new X86WindowsTargetObjectFile();
207 if (TT.isOSBinFormatCOFF())
208 return new TargetLoweringObjectFileCOFF();
209 llvm_unreachable("unknown subtarget type");
212 // FIXME: This should stop caching the target machine as soon as
213 // we can remove resetOperationActions et al.
214 X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
215 : TargetLowering(TM, createTLOF(Triple(TM.getTargetTriple()))) {
216 Subtarget = &TM.getSubtarget<X86Subtarget>();
217 X86ScalarSSEf64 = Subtarget->hasSSE2();
218 X86ScalarSSEf32 = Subtarget->hasSSE1();
219 TD = getDataLayout();
221 resetOperationActions();
224 void X86TargetLowering::resetOperationActions() {
225 const TargetMachine &TM = getTargetMachine();
226 static bool FirstTimeThrough = true;
228 // If none of the target options have changed, then we don't need to reset the
229 // operation actions.
230 if (!FirstTimeThrough && TO == TM.Options) return;
232 if (!FirstTimeThrough) {
233 // Reinitialize the actions.
235 FirstTimeThrough = false;
240 // Set up the TargetLowering object.
241 static const MVT IntVTs[] = { MVT::i8, MVT::i16, MVT::i32, MVT::i64 };
243 // X86 is weird, it always uses i8 for shift amounts and setcc results.
244 setBooleanContents(ZeroOrOneBooleanContent);
245 // X86-SSE is even stranger. It uses -1 or 0 for vector masks.
246 setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
248 // For 64-bit since we have so many registers use the ILP scheduler, for
249 // 32-bit code use the register pressure specific scheduling.
250 // For Atom, always use ILP scheduling.
251 if (Subtarget->isAtom())
252 setSchedulingPreference(Sched::ILP);
253 else if (Subtarget->is64Bit())
254 setSchedulingPreference(Sched::ILP);
256 setSchedulingPreference(Sched::RegPressure);
257 const X86RegisterInfo *RegInfo =
258 TM.getSubtarget<X86Subtarget>().getRegisterInfo();
259 setStackPointerRegisterToSaveRestore(RegInfo->getStackRegister());
261 // Bypass expensive divides on Atom when compiling with O2
262 if (Subtarget->hasSlowDivide() && TM.getOptLevel() >= CodeGenOpt::Default) {
263 addBypassSlowDiv(32, 8);
264 if (Subtarget->is64Bit())
265 addBypassSlowDiv(64, 16);
268 if (Subtarget->isTargetKnownWindowsMSVC()) {
269 // Setup Windows compiler runtime calls.
270 setLibcallName(RTLIB::SDIV_I64, "_alldiv");
271 setLibcallName(RTLIB::UDIV_I64, "_aulldiv");
272 setLibcallName(RTLIB::SREM_I64, "_allrem");
273 setLibcallName(RTLIB::UREM_I64, "_aullrem");
274 setLibcallName(RTLIB::MUL_I64, "_allmul");
275 setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::X86_StdCall);
276 setLibcallCallingConv(RTLIB::UDIV_I64, CallingConv::X86_StdCall);
277 setLibcallCallingConv(RTLIB::SREM_I64, CallingConv::X86_StdCall);
278 setLibcallCallingConv(RTLIB::UREM_I64, CallingConv::X86_StdCall);
279 setLibcallCallingConv(RTLIB::MUL_I64, CallingConv::X86_StdCall);
281 // The _ftol2 runtime function has an unusual calling conv, which
282 // is modeled by a special pseudo-instruction.
283 setLibcallName(RTLIB::FPTOUINT_F64_I64, nullptr);
284 setLibcallName(RTLIB::FPTOUINT_F32_I64, nullptr);
285 setLibcallName(RTLIB::FPTOUINT_F64_I32, nullptr);
286 setLibcallName(RTLIB::FPTOUINT_F32_I32, nullptr);
289 if (Subtarget->isTargetDarwin()) {
290 // Darwin should use _setjmp/_longjmp instead of setjmp/longjmp.
291 setUseUnderscoreSetJmp(false);
292 setUseUnderscoreLongJmp(false);
293 } else if (Subtarget->isTargetWindowsGNU()) {
294 // MS runtime is weird: it exports _setjmp, but longjmp!
295 setUseUnderscoreSetJmp(true);
296 setUseUnderscoreLongJmp(false);
298 setUseUnderscoreSetJmp(true);
299 setUseUnderscoreLongJmp(true);
302 // Set up the register classes.
303 addRegisterClass(MVT::i8, &X86::GR8RegClass);
304 addRegisterClass(MVT::i16, &X86::GR16RegClass);
305 addRegisterClass(MVT::i32, &X86::GR32RegClass);
306 if (Subtarget->is64Bit())
307 addRegisterClass(MVT::i64, &X86::GR64RegClass);
309 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
311 // We don't accept any truncstore of integer registers.
312 setTruncStoreAction(MVT::i64, MVT::i32, Expand);
313 setTruncStoreAction(MVT::i64, MVT::i16, Expand);
314 setTruncStoreAction(MVT::i64, MVT::i8 , Expand);
315 setTruncStoreAction(MVT::i32, MVT::i16, Expand);
316 setTruncStoreAction(MVT::i32, MVT::i8 , Expand);
317 setTruncStoreAction(MVT::i16, MVT::i8, Expand);
319 // SETOEQ and SETUNE require checking two conditions.
320 setCondCodeAction(ISD::SETOEQ, MVT::f32, Expand);
321 setCondCodeAction(ISD::SETOEQ, MVT::f64, Expand);
322 setCondCodeAction(ISD::SETOEQ, MVT::f80, Expand);
323 setCondCodeAction(ISD::SETUNE, MVT::f32, Expand);
324 setCondCodeAction(ISD::SETUNE, MVT::f64, Expand);
325 setCondCodeAction(ISD::SETUNE, MVT::f80, Expand);
327 // Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this
329 setOperationAction(ISD::UINT_TO_FP , MVT::i1 , Promote);
330 setOperationAction(ISD::UINT_TO_FP , MVT::i8 , Promote);
331 setOperationAction(ISD::UINT_TO_FP , MVT::i16 , Promote);
333 if (Subtarget->is64Bit()) {
334 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Promote);
335 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Custom);
336 } else if (!TM.Options.UseSoftFloat) {
337 // We have an algorithm for SSE2->double, and we turn this into a
338 // 64-bit FILD followed by conditional FADD for other targets.
339 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Custom);
340 // We have an algorithm for SSE2, and we turn this into a 64-bit
341 // FILD for other targets.
342 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Custom);
345 // Promote i1/i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have
347 setOperationAction(ISD::SINT_TO_FP , MVT::i1 , Promote);
348 setOperationAction(ISD::SINT_TO_FP , MVT::i8 , Promote);
350 if (!TM.Options.UseSoftFloat) {
351 // SSE has no i16 to fp conversion, only i32
352 if (X86ScalarSSEf32) {
353 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
354 // f32 and f64 cases are Legal, f80 case is not
355 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
357 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Custom);
358 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
361 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
362 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Promote);
365 // In 32-bit mode these are custom lowered. In 64-bit mode F32 and F64
366 // are Legal, f80 is custom lowered.
367 setOperationAction(ISD::FP_TO_SINT , MVT::i64 , Custom);
368 setOperationAction(ISD::SINT_TO_FP , MVT::i64 , Custom);
370 // Promote i1/i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have
372 setOperationAction(ISD::FP_TO_SINT , MVT::i1 , Promote);
373 setOperationAction(ISD::FP_TO_SINT , MVT::i8 , Promote);
375 if (X86ScalarSSEf32) {
376 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Promote);
377 // f32 and f64 cases are Legal, f80 case is not
378 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
380 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Custom);
381 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
384 // Handle FP_TO_UINT by promoting the destination to a larger signed
386 setOperationAction(ISD::FP_TO_UINT , MVT::i1 , Promote);
387 setOperationAction(ISD::FP_TO_UINT , MVT::i8 , Promote);
388 setOperationAction(ISD::FP_TO_UINT , MVT::i16 , Promote);
390 if (Subtarget->is64Bit()) {
391 setOperationAction(ISD::FP_TO_UINT , MVT::i64 , Expand);
392 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
393 } else if (!TM.Options.UseSoftFloat) {
394 // Since AVX is a superset of SSE3, only check for SSE here.
395 if (Subtarget->hasSSE1() && !Subtarget->hasSSE3())
396 // Expand FP_TO_UINT into a select.
397 // FIXME: We would like to use a Custom expander here eventually to do
398 // the optimal thing for SSE vs. the default expansion in the legalizer.
399 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Expand);
401 // With SSE3 we can use fisttpll to convert to a signed i64; without
402 // SSE, we're stuck with a fistpll.
403 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Custom);
406 if (isTargetFTOL()) {
407 // Use the _ftol2 runtime function, which has a pseudo-instruction
408 // to handle its weird calling convention.
409 setOperationAction(ISD::FP_TO_UINT , MVT::i64 , Custom);
412 // TODO: when we have SSE, these could be more efficient, by using movd/movq.
413 if (!X86ScalarSSEf64) {
414 setOperationAction(ISD::BITCAST , MVT::f32 , Expand);
415 setOperationAction(ISD::BITCAST , MVT::i32 , Expand);
416 if (Subtarget->is64Bit()) {
417 setOperationAction(ISD::BITCAST , MVT::f64 , Expand);
418 // Without SSE, i64->f64 goes through memory.
419 setOperationAction(ISD::BITCAST , MVT::i64 , Expand);
423 // Scalar integer divide and remainder are lowered to use operations that
424 // produce two results, to match the available instructions. This exposes
425 // the two-result form to trivial CSE, which is able to combine x/y and x%y
426 // into a single instruction.
428 // Scalar integer multiply-high is also lowered to use two-result
429 // operations, to match the available instructions. However, plain multiply
430 // (low) operations are left as Legal, as there are single-result
431 // instructions for this in x86. Using the two-result multiply instructions
432 // when both high and low results are needed must be arranged by dagcombine.
433 for (unsigned i = 0; i != array_lengthof(IntVTs); ++i) {
435 setOperationAction(ISD::MULHS, VT, Expand);
436 setOperationAction(ISD::MULHU, VT, Expand);
437 setOperationAction(ISD::SDIV, VT, Expand);
438 setOperationAction(ISD::UDIV, VT, Expand);
439 setOperationAction(ISD::SREM, VT, Expand);
440 setOperationAction(ISD::UREM, VT, Expand);
442 // Add/Sub overflow ops with MVT::Glues are lowered to EFLAGS dependences.
443 setOperationAction(ISD::ADDC, VT, Custom);
444 setOperationAction(ISD::ADDE, VT, Custom);
445 setOperationAction(ISD::SUBC, VT, Custom);
446 setOperationAction(ISD::SUBE, VT, Custom);
449 setOperationAction(ISD::BR_JT , MVT::Other, Expand);
450 setOperationAction(ISD::BRCOND , MVT::Other, Custom);
451 setOperationAction(ISD::BR_CC , MVT::f32, Expand);
452 setOperationAction(ISD::BR_CC , MVT::f64, Expand);
453 setOperationAction(ISD::BR_CC , MVT::f80, Expand);
454 setOperationAction(ISD::BR_CC , MVT::i8, Expand);
455 setOperationAction(ISD::BR_CC , MVT::i16, Expand);
456 setOperationAction(ISD::BR_CC , MVT::i32, Expand);
457 setOperationAction(ISD::BR_CC , MVT::i64, Expand);
458 setOperationAction(ISD::SELECT_CC , MVT::f32, Expand);
459 setOperationAction(ISD::SELECT_CC , MVT::f64, Expand);
460 setOperationAction(ISD::SELECT_CC , MVT::f80, Expand);
461 setOperationAction(ISD::SELECT_CC , MVT::i8, Expand);
462 setOperationAction(ISD::SELECT_CC , MVT::i16, Expand);
463 setOperationAction(ISD::SELECT_CC , MVT::i32, Expand);
464 setOperationAction(ISD::SELECT_CC , MVT::i64, Expand);
465 if (Subtarget->is64Bit())
466 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i32, Legal);
467 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16 , Legal);
468 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Legal);
469 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
470 setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
471 setOperationAction(ISD::FREM , MVT::f32 , Expand);
472 setOperationAction(ISD::FREM , MVT::f64 , Expand);
473 setOperationAction(ISD::FREM , MVT::f80 , Expand);
474 setOperationAction(ISD::FLT_ROUNDS_ , MVT::i32 , Custom);
476 // Promote the i8 variants and force them on up to i32 which has a shorter
478 setOperationAction(ISD::CTTZ , MVT::i8 , Promote);
479 AddPromotedToType (ISD::CTTZ , MVT::i8 , MVT::i32);
480 setOperationAction(ISD::CTTZ_ZERO_UNDEF , MVT::i8 , Promote);
481 AddPromotedToType (ISD::CTTZ_ZERO_UNDEF , MVT::i8 , MVT::i32);
482 if (Subtarget->hasBMI()) {
483 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i16 , Expand);
484 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32 , Expand);
485 if (Subtarget->is64Bit())
486 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i64, Expand);
488 setOperationAction(ISD::CTTZ , MVT::i16 , Custom);
489 setOperationAction(ISD::CTTZ , MVT::i32 , Custom);
490 if (Subtarget->is64Bit())
491 setOperationAction(ISD::CTTZ , MVT::i64 , Custom);
494 if (Subtarget->hasLZCNT()) {
495 // When promoting the i8 variants, force them to i32 for a shorter
497 setOperationAction(ISD::CTLZ , MVT::i8 , Promote);
498 AddPromotedToType (ISD::CTLZ , MVT::i8 , MVT::i32);
499 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i8 , Promote);
500 AddPromotedToType (ISD::CTLZ_ZERO_UNDEF, MVT::i8 , MVT::i32);
501 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i16 , Expand);
502 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32 , Expand);
503 if (Subtarget->is64Bit())
504 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Expand);
506 setOperationAction(ISD::CTLZ , MVT::i8 , Custom);
507 setOperationAction(ISD::CTLZ , MVT::i16 , Custom);
508 setOperationAction(ISD::CTLZ , MVT::i32 , Custom);
509 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i8 , Custom);
510 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i16 , Custom);
511 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32 , Custom);
512 if (Subtarget->is64Bit()) {
513 setOperationAction(ISD::CTLZ , MVT::i64 , Custom);
514 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Custom);
518 // Special handling for half-precision floating point conversions.
519 // If we don't have F16C support, then lower half float conversions
520 // into library calls.
521 if (TM.Options.UseSoftFloat || !Subtarget->hasF16C()) {
522 setOperationAction(ISD::FP16_TO_FP, MVT::f32, Expand);
523 setOperationAction(ISD::FP_TO_FP16, MVT::f32, Expand);
526 // There's never any support for operations beyond MVT::f32.
527 setOperationAction(ISD::FP16_TO_FP, MVT::f64, Expand);
528 setOperationAction(ISD::FP16_TO_FP, MVT::f80, Expand);
529 setOperationAction(ISD::FP_TO_FP16, MVT::f64, Expand);
530 setOperationAction(ISD::FP_TO_FP16, MVT::f80, Expand);
532 setLoadExtAction(ISD::EXTLOAD, MVT::f16, Expand);
533 setTruncStoreAction(MVT::f32, MVT::f16, Expand);
534 setTruncStoreAction(MVT::f64, MVT::f16, Expand);
535 setTruncStoreAction(MVT::f80, MVT::f16, Expand);
537 if (Subtarget->hasPOPCNT()) {
538 setOperationAction(ISD::CTPOP , MVT::i8 , Promote);
540 setOperationAction(ISD::CTPOP , MVT::i8 , Expand);
541 setOperationAction(ISD::CTPOP , MVT::i16 , Expand);
542 setOperationAction(ISD::CTPOP , MVT::i32 , Expand);
543 if (Subtarget->is64Bit())
544 setOperationAction(ISD::CTPOP , MVT::i64 , Expand);
547 setOperationAction(ISD::READCYCLECOUNTER , MVT::i64 , Custom);
549 if (!Subtarget->hasMOVBE())
550 setOperationAction(ISD::BSWAP , MVT::i16 , Expand);
552 // These should be promoted to a larger select which is supported.
553 setOperationAction(ISD::SELECT , MVT::i1 , Promote);
554 // X86 wants to expand cmov itself.
555 setOperationAction(ISD::SELECT , MVT::i8 , Custom);
556 setOperationAction(ISD::SELECT , MVT::i16 , Custom);
557 setOperationAction(ISD::SELECT , MVT::i32 , Custom);
558 setOperationAction(ISD::SELECT , MVT::f32 , Custom);
559 setOperationAction(ISD::SELECT , MVT::f64 , Custom);
560 setOperationAction(ISD::SELECT , MVT::f80 , Custom);
561 setOperationAction(ISD::SETCC , MVT::i8 , Custom);
562 setOperationAction(ISD::SETCC , MVT::i16 , Custom);
563 setOperationAction(ISD::SETCC , MVT::i32 , Custom);
564 setOperationAction(ISD::SETCC , MVT::f32 , Custom);
565 setOperationAction(ISD::SETCC , MVT::f64 , Custom);
566 setOperationAction(ISD::SETCC , MVT::f80 , Custom);
567 if (Subtarget->is64Bit()) {
568 setOperationAction(ISD::SELECT , MVT::i64 , Custom);
569 setOperationAction(ISD::SETCC , MVT::i64 , Custom);
571 setOperationAction(ISD::EH_RETURN , MVT::Other, Custom);
572 // NOTE: EH_SJLJ_SETJMP/_LONGJMP supported here is NOT intended to support
573 // SjLj exception handling but a light-weight setjmp/longjmp replacement to
574 // support continuation, user-level threading, and etc.. As a result, no
575 // other SjLj exception interfaces are implemented and please don't build
576 // your own exception handling based on them.
577 // LLVM/Clang supports zero-cost DWARF exception handling.
578 setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom);
579 setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom);
582 setOperationAction(ISD::ConstantPool , MVT::i32 , Custom);
583 setOperationAction(ISD::JumpTable , MVT::i32 , Custom);
584 setOperationAction(ISD::GlobalAddress , MVT::i32 , Custom);
585 setOperationAction(ISD::GlobalTLSAddress, MVT::i32 , Custom);
586 if (Subtarget->is64Bit())
587 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
588 setOperationAction(ISD::ExternalSymbol , MVT::i32 , Custom);
589 setOperationAction(ISD::BlockAddress , MVT::i32 , Custom);
590 if (Subtarget->is64Bit()) {
591 setOperationAction(ISD::ConstantPool , MVT::i64 , Custom);
592 setOperationAction(ISD::JumpTable , MVT::i64 , Custom);
593 setOperationAction(ISD::GlobalAddress , MVT::i64 , Custom);
594 setOperationAction(ISD::ExternalSymbol, MVT::i64 , Custom);
595 setOperationAction(ISD::BlockAddress , MVT::i64 , Custom);
597 // 64-bit addm sub, shl, sra, srl (iff 32-bit x86)
598 setOperationAction(ISD::SHL_PARTS , MVT::i32 , Custom);
599 setOperationAction(ISD::SRA_PARTS , MVT::i32 , Custom);
600 setOperationAction(ISD::SRL_PARTS , MVT::i32 , Custom);
601 if (Subtarget->is64Bit()) {
602 setOperationAction(ISD::SHL_PARTS , MVT::i64 , Custom);
603 setOperationAction(ISD::SRA_PARTS , MVT::i64 , Custom);
604 setOperationAction(ISD::SRL_PARTS , MVT::i64 , Custom);
607 if (Subtarget->hasSSE1())
608 setOperationAction(ISD::PREFETCH , MVT::Other, Legal);
610 setOperationAction(ISD::ATOMIC_FENCE , MVT::Other, Custom);
612 // Expand certain atomics
613 for (unsigned i = 0; i != array_lengthof(IntVTs); ++i) {
615 setOperationAction(ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS, VT, Custom);
616 setOperationAction(ISD::ATOMIC_LOAD_SUB, VT, Custom);
617 setOperationAction(ISD::ATOMIC_STORE, VT, Custom);
620 if (Subtarget->hasCmpxchg16b()) {
621 setOperationAction(ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS, MVT::i128, Custom);
624 // FIXME - use subtarget debug flags
625 if (!Subtarget->isTargetDarwin() && !Subtarget->isTargetELF() &&
626 !Subtarget->isTargetCygMing() && !Subtarget->isTargetWin64()) {
627 setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
630 if (Subtarget->is64Bit()) {
631 setExceptionPointerRegister(X86::RAX);
632 setExceptionSelectorRegister(X86::RDX);
634 setExceptionPointerRegister(X86::EAX);
635 setExceptionSelectorRegister(X86::EDX);
637 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i32, Custom);
638 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i64, Custom);
640 setOperationAction(ISD::INIT_TRAMPOLINE, MVT::Other, Custom);
641 setOperationAction(ISD::ADJUST_TRAMPOLINE, MVT::Other, Custom);
643 setOperationAction(ISD::TRAP, MVT::Other, Legal);
644 setOperationAction(ISD::DEBUGTRAP, MVT::Other, Legal);
646 // VASTART needs to be custom lowered to use the VarArgsFrameIndex
647 setOperationAction(ISD::VASTART , MVT::Other, Custom);
648 setOperationAction(ISD::VAEND , MVT::Other, Expand);
649 if (Subtarget->is64Bit() && !Subtarget->isTargetWin64()) {
650 // TargetInfo::X86_64ABIBuiltinVaList
651 setOperationAction(ISD::VAARG , MVT::Other, Custom);
652 setOperationAction(ISD::VACOPY , MVT::Other, Custom);
654 // TargetInfo::CharPtrBuiltinVaList
655 setOperationAction(ISD::VAARG , MVT::Other, Expand);
656 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
659 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
660 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
662 setOperationAction(ISD::DYNAMIC_STACKALLOC, getPointerTy(), Custom);
664 if (!TM.Options.UseSoftFloat && X86ScalarSSEf64) {
665 // f32 and f64 use SSE.
666 // Set up the FP register classes.
667 addRegisterClass(MVT::f32, &X86::FR32RegClass);
668 addRegisterClass(MVT::f64, &X86::FR64RegClass);
670 // Use ANDPD to simulate FABS.
671 setOperationAction(ISD::FABS , MVT::f64, Custom);
672 setOperationAction(ISD::FABS , MVT::f32, Custom);
674 // Use XORP to simulate FNEG.
675 setOperationAction(ISD::FNEG , MVT::f64, Custom);
676 setOperationAction(ISD::FNEG , MVT::f32, Custom);
678 // Use ANDPD and ORPD to simulate FCOPYSIGN.
679 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
680 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
682 // Lower this to FGETSIGNx86 plus an AND.
683 setOperationAction(ISD::FGETSIGN, MVT::i64, Custom);
684 setOperationAction(ISD::FGETSIGN, MVT::i32, Custom);
686 // We don't support sin/cos/fmod
687 setOperationAction(ISD::FSIN , MVT::f64, Expand);
688 setOperationAction(ISD::FCOS , MVT::f64, Expand);
689 setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
690 setOperationAction(ISD::FSIN , MVT::f32, Expand);
691 setOperationAction(ISD::FCOS , MVT::f32, Expand);
692 setOperationAction(ISD::FSINCOS, MVT::f32, Expand);
694 // Expand FP immediates into loads from the stack, except for the special
696 addLegalFPImmediate(APFloat(+0.0)); // xorpd
697 addLegalFPImmediate(APFloat(+0.0f)); // xorps
698 } else if (!TM.Options.UseSoftFloat && X86ScalarSSEf32) {
699 // Use SSE for f32, x87 for f64.
700 // Set up the FP register classes.
701 addRegisterClass(MVT::f32, &X86::FR32RegClass);
702 addRegisterClass(MVT::f64, &X86::RFP64RegClass);
704 // Use ANDPS to simulate FABS.
705 setOperationAction(ISD::FABS , MVT::f32, Custom);
707 // Use XORP to simulate FNEG.
708 setOperationAction(ISD::FNEG , MVT::f32, Custom);
710 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
712 // Use ANDPS and ORPS to simulate FCOPYSIGN.
713 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
714 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
716 // We don't support sin/cos/fmod
717 setOperationAction(ISD::FSIN , MVT::f32, Expand);
718 setOperationAction(ISD::FCOS , MVT::f32, Expand);
719 setOperationAction(ISD::FSINCOS, MVT::f32, Expand);
721 // Special cases we handle for FP constants.
722 addLegalFPImmediate(APFloat(+0.0f)); // xorps
723 addLegalFPImmediate(APFloat(+0.0)); // FLD0
724 addLegalFPImmediate(APFloat(+1.0)); // FLD1
725 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
726 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
728 if (!TM.Options.UnsafeFPMath) {
729 setOperationAction(ISD::FSIN , MVT::f64, Expand);
730 setOperationAction(ISD::FCOS , MVT::f64, Expand);
731 setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
733 } else if (!TM.Options.UseSoftFloat) {
734 // f32 and f64 in x87.
735 // Set up the FP register classes.
736 addRegisterClass(MVT::f64, &X86::RFP64RegClass);
737 addRegisterClass(MVT::f32, &X86::RFP32RegClass);
739 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
740 setOperationAction(ISD::UNDEF, MVT::f32, Expand);
741 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
742 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
744 if (!TM.Options.UnsafeFPMath) {
745 setOperationAction(ISD::FSIN , MVT::f64, Expand);
746 setOperationAction(ISD::FSIN , MVT::f32, Expand);
747 setOperationAction(ISD::FCOS , MVT::f64, Expand);
748 setOperationAction(ISD::FCOS , MVT::f32, Expand);
749 setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
750 setOperationAction(ISD::FSINCOS, MVT::f32, Expand);
752 addLegalFPImmediate(APFloat(+0.0)); // FLD0
753 addLegalFPImmediate(APFloat(+1.0)); // FLD1
754 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
755 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
756 addLegalFPImmediate(APFloat(+0.0f)); // FLD0
757 addLegalFPImmediate(APFloat(+1.0f)); // FLD1
758 addLegalFPImmediate(APFloat(-0.0f)); // FLD0/FCHS
759 addLegalFPImmediate(APFloat(-1.0f)); // FLD1/FCHS
762 // We don't support FMA.
763 setOperationAction(ISD::FMA, MVT::f64, Expand);
764 setOperationAction(ISD::FMA, MVT::f32, Expand);
766 // Long double always uses X87.
767 if (!TM.Options.UseSoftFloat) {
768 addRegisterClass(MVT::f80, &X86::RFP80RegClass);
769 setOperationAction(ISD::UNDEF, MVT::f80, Expand);
770 setOperationAction(ISD::FCOPYSIGN, MVT::f80, Expand);
772 APFloat TmpFlt = APFloat::getZero(APFloat::x87DoubleExtended);
773 addLegalFPImmediate(TmpFlt); // FLD0
775 addLegalFPImmediate(TmpFlt); // FLD0/FCHS
778 APFloat TmpFlt2(+1.0);
779 TmpFlt2.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven,
781 addLegalFPImmediate(TmpFlt2); // FLD1
782 TmpFlt2.changeSign();
783 addLegalFPImmediate(TmpFlt2); // FLD1/FCHS
786 if (!TM.Options.UnsafeFPMath) {
787 setOperationAction(ISD::FSIN , MVT::f80, Expand);
788 setOperationAction(ISD::FCOS , MVT::f80, Expand);
789 setOperationAction(ISD::FSINCOS, MVT::f80, Expand);
792 setOperationAction(ISD::FFLOOR, MVT::f80, Expand);
793 setOperationAction(ISD::FCEIL, MVT::f80, Expand);
794 setOperationAction(ISD::FTRUNC, MVT::f80, Expand);
795 setOperationAction(ISD::FRINT, MVT::f80, Expand);
796 setOperationAction(ISD::FNEARBYINT, MVT::f80, Expand);
797 setOperationAction(ISD::FMA, MVT::f80, Expand);
800 // Always use a library call for pow.
801 setOperationAction(ISD::FPOW , MVT::f32 , Expand);
802 setOperationAction(ISD::FPOW , MVT::f64 , Expand);
803 setOperationAction(ISD::FPOW , MVT::f80 , Expand);
805 setOperationAction(ISD::FLOG, MVT::f80, Expand);
806 setOperationAction(ISD::FLOG2, MVT::f80, Expand);
807 setOperationAction(ISD::FLOG10, MVT::f80, Expand);
808 setOperationAction(ISD::FEXP, MVT::f80, Expand);
809 setOperationAction(ISD::FEXP2, MVT::f80, Expand);
811 // First set operation action for all vector types to either promote
812 // (for widening) or expand (for scalarization). Then we will selectively
813 // turn on ones that can be effectively codegen'd.
814 for (int i = MVT::FIRST_VECTOR_VALUETYPE;
815 i <= MVT::LAST_VECTOR_VALUETYPE; ++i) {
816 MVT VT = (MVT::SimpleValueType)i;
817 setOperationAction(ISD::ADD , VT, Expand);
818 setOperationAction(ISD::SUB , VT, Expand);
819 setOperationAction(ISD::FADD, VT, Expand);
820 setOperationAction(ISD::FNEG, VT, Expand);
821 setOperationAction(ISD::FSUB, VT, Expand);
822 setOperationAction(ISD::MUL , VT, Expand);
823 setOperationAction(ISD::FMUL, VT, Expand);
824 setOperationAction(ISD::SDIV, VT, Expand);
825 setOperationAction(ISD::UDIV, VT, Expand);
826 setOperationAction(ISD::FDIV, VT, Expand);
827 setOperationAction(ISD::SREM, VT, Expand);
828 setOperationAction(ISD::UREM, VT, Expand);
829 setOperationAction(ISD::LOAD, VT, Expand);
830 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Expand);
831 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT,Expand);
832 setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Expand);
833 setOperationAction(ISD::EXTRACT_SUBVECTOR, VT,Expand);
834 setOperationAction(ISD::INSERT_SUBVECTOR, VT,Expand);
835 setOperationAction(ISD::FABS, VT, Expand);
836 setOperationAction(ISD::FSIN, VT, Expand);
837 setOperationAction(ISD::FSINCOS, VT, Expand);
838 setOperationAction(ISD::FCOS, VT, Expand);
839 setOperationAction(ISD::FSINCOS, VT, Expand);
840 setOperationAction(ISD::FREM, VT, Expand);
841 setOperationAction(ISD::FMA, VT, Expand);
842 setOperationAction(ISD::FPOWI, VT, Expand);
843 setOperationAction(ISD::FSQRT, VT, Expand);
844 setOperationAction(ISD::FCOPYSIGN, VT, Expand);
845 setOperationAction(ISD::FFLOOR, VT, Expand);
846 setOperationAction(ISD::FCEIL, VT, Expand);
847 setOperationAction(ISD::FTRUNC, VT, Expand);
848 setOperationAction(ISD::FRINT, VT, Expand);
849 setOperationAction(ISD::FNEARBYINT, VT, Expand);
850 setOperationAction(ISD::SMUL_LOHI, VT, Expand);
851 setOperationAction(ISD::MULHS, VT, Expand);
852 setOperationAction(ISD::UMUL_LOHI, VT, Expand);
853 setOperationAction(ISD::MULHU, VT, Expand);
854 setOperationAction(ISD::SDIVREM, VT, Expand);
855 setOperationAction(ISD::UDIVREM, VT, Expand);
856 setOperationAction(ISD::FPOW, VT, Expand);
857 setOperationAction(ISD::CTPOP, VT, Expand);
858 setOperationAction(ISD::CTTZ, VT, Expand);
859 setOperationAction(ISD::CTTZ_ZERO_UNDEF, VT, Expand);
860 setOperationAction(ISD::CTLZ, VT, Expand);
861 setOperationAction(ISD::CTLZ_ZERO_UNDEF, VT, Expand);
862 setOperationAction(ISD::SHL, VT, Expand);
863 setOperationAction(ISD::SRA, VT, Expand);
864 setOperationAction(ISD::SRL, VT, Expand);
865 setOperationAction(ISD::ROTL, VT, Expand);
866 setOperationAction(ISD::ROTR, VT, Expand);
867 setOperationAction(ISD::BSWAP, VT, Expand);
868 setOperationAction(ISD::SETCC, VT, Expand);
869 setOperationAction(ISD::FLOG, VT, Expand);
870 setOperationAction(ISD::FLOG2, VT, Expand);
871 setOperationAction(ISD::FLOG10, VT, Expand);
872 setOperationAction(ISD::FEXP, VT, Expand);
873 setOperationAction(ISD::FEXP2, VT, Expand);
874 setOperationAction(ISD::FP_TO_UINT, VT, Expand);
875 setOperationAction(ISD::FP_TO_SINT, VT, Expand);
876 setOperationAction(ISD::UINT_TO_FP, VT, Expand);
877 setOperationAction(ISD::SINT_TO_FP, VT, Expand);
878 setOperationAction(ISD::SIGN_EXTEND_INREG, VT,Expand);
879 setOperationAction(ISD::TRUNCATE, VT, Expand);
880 setOperationAction(ISD::SIGN_EXTEND, VT, Expand);
881 setOperationAction(ISD::ZERO_EXTEND, VT, Expand);
882 setOperationAction(ISD::ANY_EXTEND, VT, Expand);
883 setOperationAction(ISD::VSELECT, VT, Expand);
884 setOperationAction(ISD::SELECT_CC, VT, Expand);
885 for (int InnerVT = MVT::FIRST_VECTOR_VALUETYPE;
886 InnerVT <= MVT::LAST_VECTOR_VALUETYPE; ++InnerVT)
887 setTruncStoreAction(VT,
888 (MVT::SimpleValueType)InnerVT, Expand);
889 setLoadExtAction(ISD::SEXTLOAD, VT, Expand);
890 setLoadExtAction(ISD::ZEXTLOAD, VT, Expand);
892 // N.b. ISD::EXTLOAD legality is basically ignored except for i1-like types,
893 // we have to deal with them whether we ask for Expansion or not. Setting
894 // Expand causes its own optimisation problems though, so leave them legal.
895 if (VT.getVectorElementType() == MVT::i1)
896 setLoadExtAction(ISD::EXTLOAD, VT, Expand);
899 // FIXME: In order to prevent SSE instructions being expanded to MMX ones
900 // with -msoft-float, disable use of MMX as well.
901 if (!TM.Options.UseSoftFloat && Subtarget->hasMMX()) {
902 addRegisterClass(MVT::x86mmx, &X86::VR64RegClass);
903 // No operations on x86mmx supported, everything uses intrinsics.
906 // MMX-sized vectors (other than x86mmx) are expected to be expanded
907 // into smaller operations.
908 setOperationAction(ISD::MULHS, MVT::v8i8, Expand);
909 setOperationAction(ISD::MULHS, MVT::v4i16, Expand);
910 setOperationAction(ISD::MULHS, MVT::v2i32, Expand);
911 setOperationAction(ISD::MULHS, MVT::v1i64, Expand);
912 setOperationAction(ISD::AND, MVT::v8i8, Expand);
913 setOperationAction(ISD::AND, MVT::v4i16, Expand);
914 setOperationAction(ISD::AND, MVT::v2i32, Expand);
915 setOperationAction(ISD::AND, MVT::v1i64, Expand);
916 setOperationAction(ISD::OR, MVT::v8i8, Expand);
917 setOperationAction(ISD::OR, MVT::v4i16, Expand);
918 setOperationAction(ISD::OR, MVT::v2i32, Expand);
919 setOperationAction(ISD::OR, MVT::v1i64, Expand);
920 setOperationAction(ISD::XOR, MVT::v8i8, Expand);
921 setOperationAction(ISD::XOR, MVT::v4i16, Expand);
922 setOperationAction(ISD::XOR, MVT::v2i32, Expand);
923 setOperationAction(ISD::XOR, MVT::v1i64, Expand);
924 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i8, Expand);
925 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i16, Expand);
926 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v2i32, Expand);
927 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v1i64, Expand);
928 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v1i64, Expand);
929 setOperationAction(ISD::SELECT, MVT::v8i8, Expand);
930 setOperationAction(ISD::SELECT, MVT::v4i16, Expand);
931 setOperationAction(ISD::SELECT, MVT::v2i32, Expand);
932 setOperationAction(ISD::SELECT, MVT::v1i64, Expand);
933 setOperationAction(ISD::BITCAST, MVT::v8i8, Expand);
934 setOperationAction(ISD::BITCAST, MVT::v4i16, Expand);
935 setOperationAction(ISD::BITCAST, MVT::v2i32, Expand);
936 setOperationAction(ISD::BITCAST, MVT::v1i64, Expand);
938 if (!TM.Options.UseSoftFloat && Subtarget->hasSSE1()) {
939 addRegisterClass(MVT::v4f32, &X86::VR128RegClass);
941 setOperationAction(ISD::FADD, MVT::v4f32, Legal);
942 setOperationAction(ISD::FSUB, MVT::v4f32, Legal);
943 setOperationAction(ISD::FMUL, MVT::v4f32, Legal);
944 setOperationAction(ISD::FDIV, MVT::v4f32, Legal);
945 setOperationAction(ISD::FSQRT, MVT::v4f32, Legal);
946 setOperationAction(ISD::FNEG, MVT::v4f32, Custom);
947 setOperationAction(ISD::FABS, MVT::v4f32, Custom);
948 setOperationAction(ISD::LOAD, MVT::v4f32, Legal);
949 setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
950 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4f32, Custom);
951 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
952 setOperationAction(ISD::SELECT, MVT::v4f32, Custom);
955 if (!TM.Options.UseSoftFloat && Subtarget->hasSSE2()) {
956 addRegisterClass(MVT::v2f64, &X86::VR128RegClass);
958 // FIXME: Unfortunately -soft-float and -no-implicit-float means XMM
959 // registers cannot be used even for integer operations.
960 addRegisterClass(MVT::v16i8, &X86::VR128RegClass);
961 addRegisterClass(MVT::v8i16, &X86::VR128RegClass);
962 addRegisterClass(MVT::v4i32, &X86::VR128RegClass);
963 addRegisterClass(MVT::v2i64, &X86::VR128RegClass);
965 setOperationAction(ISD::ADD, MVT::v16i8, Legal);
966 setOperationAction(ISD::ADD, MVT::v8i16, Legal);
967 setOperationAction(ISD::ADD, MVT::v4i32, Legal);
968 setOperationAction(ISD::ADD, MVT::v2i64, Legal);
969 setOperationAction(ISD::MUL, MVT::v4i32, Custom);
970 setOperationAction(ISD::MUL, MVT::v2i64, Custom);
971 setOperationAction(ISD::UMUL_LOHI, MVT::v4i32, Custom);
972 setOperationAction(ISD::SMUL_LOHI, MVT::v4i32, Custom);
973 setOperationAction(ISD::MULHU, MVT::v8i16, Legal);
974 setOperationAction(ISD::MULHS, MVT::v8i16, Legal);
975 setOperationAction(ISD::SUB, MVT::v16i8, Legal);
976 setOperationAction(ISD::SUB, MVT::v8i16, Legal);
977 setOperationAction(ISD::SUB, MVT::v4i32, Legal);
978 setOperationAction(ISD::SUB, MVT::v2i64, Legal);
979 setOperationAction(ISD::MUL, MVT::v8i16, Legal);
980 setOperationAction(ISD::FADD, MVT::v2f64, Legal);
981 setOperationAction(ISD::FSUB, MVT::v2f64, Legal);
982 setOperationAction(ISD::FMUL, MVT::v2f64, Legal);
983 setOperationAction(ISD::FDIV, MVT::v2f64, Legal);
984 setOperationAction(ISD::FSQRT, MVT::v2f64, Legal);
985 setOperationAction(ISD::FNEG, MVT::v2f64, Custom);
986 setOperationAction(ISD::FABS, MVT::v2f64, Custom);
988 setOperationAction(ISD::SETCC, MVT::v2i64, Custom);
989 setOperationAction(ISD::SETCC, MVT::v16i8, Custom);
990 setOperationAction(ISD::SETCC, MVT::v8i16, Custom);
991 setOperationAction(ISD::SETCC, MVT::v4i32, Custom);
993 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16i8, Custom);
994 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i16, Custom);
995 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
996 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
997 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
999 // Custom lower build_vector, vector_shuffle, and extract_vector_elt.
1000 for (int i = MVT::v16i8; i != MVT::v2i64; ++i) {
1001 MVT VT = (MVT::SimpleValueType)i;
1002 // Do not attempt to custom lower non-power-of-2 vectors
1003 if (!isPowerOf2_32(VT.getVectorNumElements()))
1005 // Do not attempt to custom lower non-128-bit vectors
1006 if (!VT.is128BitVector())
1008 setOperationAction(ISD::BUILD_VECTOR, VT, Custom);
1009 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom);
1010 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom);
1013 // We support custom legalizing of sext and anyext loads for specific
1014 // memory vector types which we can load as a scalar (or sequence of
1015 // scalars) and extend in-register to a legal 128-bit vector type. For sext
1016 // loads these must work with a single scalar load.
1017 setLoadExtAction(ISD::SEXTLOAD, MVT::v4i8, Custom);
1018 if (Subtarget->is64Bit()) {
1019 setLoadExtAction(ISD::SEXTLOAD, MVT::v4i16, Custom);
1020 setLoadExtAction(ISD::SEXTLOAD, MVT::v8i8, Custom);
1022 setLoadExtAction(ISD::EXTLOAD, MVT::v2i8, Custom);
1023 setLoadExtAction(ISD::EXTLOAD, MVT::v2i16, Custom);
1024 setLoadExtAction(ISD::EXTLOAD, MVT::v2i32, Custom);
1025 setLoadExtAction(ISD::EXTLOAD, MVT::v4i8, Custom);
1026 setLoadExtAction(ISD::EXTLOAD, MVT::v4i16, Custom);
1027 setLoadExtAction(ISD::EXTLOAD, MVT::v8i8, Custom);
1029 setOperationAction(ISD::BUILD_VECTOR, MVT::v2f64, Custom);
1030 setOperationAction(ISD::BUILD_VECTOR, MVT::v2i64, Custom);
1031 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Custom);
1032 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Custom);
1033 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2f64, Custom);
1034 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Custom);
1036 if (Subtarget->is64Bit()) {
1037 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Custom);
1038 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
1041 // Promote v16i8, v8i16, v4i32 load, select, and, or, xor to v2i64.
1042 for (int i = MVT::v16i8; i != MVT::v2i64; ++i) {
1043 MVT VT = (MVT::SimpleValueType)i;
1045 // Do not attempt to promote non-128-bit vectors
1046 if (!VT.is128BitVector())
1049 setOperationAction(ISD::AND, VT, Promote);
1050 AddPromotedToType (ISD::AND, VT, MVT::v2i64);
1051 setOperationAction(ISD::OR, VT, Promote);
1052 AddPromotedToType (ISD::OR, VT, MVT::v2i64);
1053 setOperationAction(ISD::XOR, VT, Promote);
1054 AddPromotedToType (ISD::XOR, VT, MVT::v2i64);
1055 setOperationAction(ISD::LOAD, VT, Promote);
1056 AddPromotedToType (ISD::LOAD, VT, MVT::v2i64);
1057 setOperationAction(ISD::SELECT, VT, Promote);
1058 AddPromotedToType (ISD::SELECT, VT, MVT::v2i64);
1061 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
1063 // Custom lower v2i64 and v2f64 selects.
1064 setOperationAction(ISD::LOAD, MVT::v2f64, Legal);
1065 setOperationAction(ISD::LOAD, MVT::v2i64, Legal);
1066 setOperationAction(ISD::SELECT, MVT::v2f64, Custom);
1067 setOperationAction(ISD::SELECT, MVT::v2i64, Custom);
1069 setOperationAction(ISD::FP_TO_SINT, MVT::v4i32, Legal);
1070 setOperationAction(ISD::SINT_TO_FP, MVT::v4i32, Legal);
1072 setOperationAction(ISD::UINT_TO_FP, MVT::v4i8, Custom);
1073 setOperationAction(ISD::UINT_TO_FP, MVT::v4i16, Custom);
1074 // As there is no 64-bit GPR available, we need build a special custom
1075 // sequence to convert from v2i32 to v2f32.
1076 if (!Subtarget->is64Bit())
1077 setOperationAction(ISD::UINT_TO_FP, MVT::v2f32, Custom);
1079 setOperationAction(ISD::FP_EXTEND, MVT::v2f32, Custom);
1080 setOperationAction(ISD::FP_ROUND, MVT::v2f32, Custom);
1082 setLoadExtAction(ISD::EXTLOAD, MVT::v2f32, Legal);
1084 setOperationAction(ISD::BITCAST, MVT::v2i32, Custom);
1085 setOperationAction(ISD::BITCAST, MVT::v4i16, Custom);
1086 setOperationAction(ISD::BITCAST, MVT::v8i8, Custom);
1089 if (!TM.Options.UseSoftFloat && Subtarget->hasSSE41()) {
1090 setOperationAction(ISD::FFLOOR, MVT::f32, Legal);
1091 setOperationAction(ISD::FCEIL, MVT::f32, Legal);
1092 setOperationAction(ISD::FTRUNC, MVT::f32, Legal);
1093 setOperationAction(ISD::FRINT, MVT::f32, Legal);
1094 setOperationAction(ISD::FNEARBYINT, MVT::f32, Legal);
1095 setOperationAction(ISD::FFLOOR, MVT::f64, Legal);
1096 setOperationAction(ISD::FCEIL, MVT::f64, Legal);
1097 setOperationAction(ISD::FTRUNC, MVT::f64, Legal);
1098 setOperationAction(ISD::FRINT, MVT::f64, Legal);
1099 setOperationAction(ISD::FNEARBYINT, MVT::f64, Legal);
1101 setOperationAction(ISD::FFLOOR, MVT::v4f32, Legal);
1102 setOperationAction(ISD::FCEIL, MVT::v4f32, Legal);
1103 setOperationAction(ISD::FTRUNC, MVT::v4f32, Legal);
1104 setOperationAction(ISD::FRINT, MVT::v4f32, Legal);
1105 setOperationAction(ISD::FNEARBYINT, MVT::v4f32, Legal);
1106 setOperationAction(ISD::FFLOOR, MVT::v2f64, Legal);
1107 setOperationAction(ISD::FCEIL, MVT::v2f64, Legal);
1108 setOperationAction(ISD::FTRUNC, MVT::v2f64, Legal);
1109 setOperationAction(ISD::FRINT, MVT::v2f64, Legal);
1110 setOperationAction(ISD::FNEARBYINT, MVT::v2f64, Legal);
1112 // FIXME: Do we need to handle scalar-to-vector here?
1113 setOperationAction(ISD::MUL, MVT::v4i32, Legal);
1115 setOperationAction(ISD::VSELECT, MVT::v2f64, Custom);
1116 setOperationAction(ISD::VSELECT, MVT::v2i64, Custom);
1117 setOperationAction(ISD::VSELECT, MVT::v4i32, Custom);
1118 setOperationAction(ISD::VSELECT, MVT::v4f32, Custom);
1119 setOperationAction(ISD::VSELECT, MVT::v8i16, Custom);
1120 // There is no BLENDI for byte vectors. We don't need to custom lower
1121 // some vselects for now.
1122 setOperationAction(ISD::VSELECT, MVT::v16i8, Legal);
1124 // SSE41 brings specific instructions for doing vector sign extend even in
1125 // cases where we don't have SRA.
1126 setLoadExtAction(ISD::SEXTLOAD, MVT::v2i8, Custom);
1127 setLoadExtAction(ISD::SEXTLOAD, MVT::v2i16, Custom);
1128 setLoadExtAction(ISD::SEXTLOAD, MVT::v2i32, Custom);
1130 // i8 and i16 vectors are custom because the source register and source
1131 // source memory operand types are not the same width. f32 vectors are
1132 // custom since the immediate controlling the insert encodes additional
1134 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i8, Custom);
1135 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
1136 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
1137 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
1139 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v16i8, Custom);
1140 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v8i16, Custom);
1141 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4i32, Custom);
1142 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
1144 // FIXME: these should be Legal, but that's only for the case where
1145 // the index is constant. For now custom expand to deal with that.
1146 if (Subtarget->is64Bit()) {
1147 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Custom);
1148 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
1152 if (Subtarget->hasSSE2()) {
1153 setOperationAction(ISD::SRL, MVT::v8i16, Custom);
1154 setOperationAction(ISD::SRL, MVT::v16i8, Custom);
1156 setOperationAction(ISD::SHL, MVT::v8i16, Custom);
1157 setOperationAction(ISD::SHL, MVT::v16i8, Custom);
1159 setOperationAction(ISD::SRA, MVT::v8i16, Custom);
1160 setOperationAction(ISD::SRA, MVT::v16i8, Custom);
1162 // In the customized shift lowering, the legal cases in AVX2 will be
1164 setOperationAction(ISD::SRL, MVT::v2i64, Custom);
1165 setOperationAction(ISD::SRL, MVT::v4i32, Custom);
1167 setOperationAction(ISD::SHL, MVT::v2i64, Custom);
1168 setOperationAction(ISD::SHL, MVT::v4i32, Custom);
1170 setOperationAction(ISD::SRA, MVT::v4i32, Custom);
1173 if (!TM.Options.UseSoftFloat && Subtarget->hasFp256()) {
1174 addRegisterClass(MVT::v32i8, &X86::VR256RegClass);
1175 addRegisterClass(MVT::v16i16, &X86::VR256RegClass);
1176 addRegisterClass(MVT::v8i32, &X86::VR256RegClass);
1177 addRegisterClass(MVT::v8f32, &X86::VR256RegClass);
1178 addRegisterClass(MVT::v4i64, &X86::VR256RegClass);
1179 addRegisterClass(MVT::v4f64, &X86::VR256RegClass);
1181 setOperationAction(ISD::LOAD, MVT::v8f32, Legal);
1182 setOperationAction(ISD::LOAD, MVT::v4f64, Legal);
1183 setOperationAction(ISD::LOAD, MVT::v4i64, Legal);
1185 setOperationAction(ISD::FADD, MVT::v8f32, Legal);
1186 setOperationAction(ISD::FSUB, MVT::v8f32, Legal);
1187 setOperationAction(ISD::FMUL, MVT::v8f32, Legal);
1188 setOperationAction(ISD::FDIV, MVT::v8f32, Legal);
1189 setOperationAction(ISD::FSQRT, MVT::v8f32, Legal);
1190 setOperationAction(ISD::FFLOOR, MVT::v8f32, Legal);
1191 setOperationAction(ISD::FCEIL, MVT::v8f32, Legal);
1192 setOperationAction(ISD::FTRUNC, MVT::v8f32, Legal);
1193 setOperationAction(ISD::FRINT, MVT::v8f32, Legal);
1194 setOperationAction(ISD::FNEARBYINT, MVT::v8f32, Legal);
1195 setOperationAction(ISD::FNEG, MVT::v8f32, Custom);
1196 setOperationAction(ISD::FABS, MVT::v8f32, Custom);
1198 setOperationAction(ISD::FADD, MVT::v4f64, Legal);
1199 setOperationAction(ISD::FSUB, MVT::v4f64, Legal);
1200 setOperationAction(ISD::FMUL, MVT::v4f64, Legal);
1201 setOperationAction(ISD::FDIV, MVT::v4f64, Legal);
1202 setOperationAction(ISD::FSQRT, MVT::v4f64, Legal);
1203 setOperationAction(ISD::FFLOOR, MVT::v4f64, Legal);
1204 setOperationAction(ISD::FCEIL, MVT::v4f64, Legal);
1205 setOperationAction(ISD::FTRUNC, MVT::v4f64, Legal);
1206 setOperationAction(ISD::FRINT, MVT::v4f64, Legal);
1207 setOperationAction(ISD::FNEARBYINT, MVT::v4f64, Legal);
1208 setOperationAction(ISD::FNEG, MVT::v4f64, Custom);
1209 setOperationAction(ISD::FABS, MVT::v4f64, Custom);
1211 // (fp_to_int:v8i16 (v8f32 ..)) requires the result type to be promoted
1212 // even though v8i16 is a legal type.
1213 setOperationAction(ISD::FP_TO_SINT, MVT::v8i16, Promote);
1214 setOperationAction(ISD::FP_TO_UINT, MVT::v8i16, Promote);
1215 setOperationAction(ISD::FP_TO_SINT, MVT::v8i32, Legal);
1217 setOperationAction(ISD::SINT_TO_FP, MVT::v8i16, Promote);
1218 setOperationAction(ISD::SINT_TO_FP, MVT::v8i32, Legal);
1219 setOperationAction(ISD::FP_ROUND, MVT::v4f32, Legal);
1221 setOperationAction(ISD::UINT_TO_FP, MVT::v8i8, Custom);
1222 setOperationAction(ISD::UINT_TO_FP, MVT::v8i16, Custom);
1224 setLoadExtAction(ISD::EXTLOAD, MVT::v4f32, Legal);
1226 setOperationAction(ISD::SRL, MVT::v16i16, Custom);
1227 setOperationAction(ISD::SRL, MVT::v32i8, Custom);
1229 setOperationAction(ISD::SHL, MVT::v16i16, Custom);
1230 setOperationAction(ISD::SHL, MVT::v32i8, Custom);
1232 setOperationAction(ISD::SRA, MVT::v16i16, Custom);
1233 setOperationAction(ISD::SRA, MVT::v32i8, Custom);
1235 setOperationAction(ISD::SETCC, MVT::v32i8, Custom);
1236 setOperationAction(ISD::SETCC, MVT::v16i16, Custom);
1237 setOperationAction(ISD::SETCC, MVT::v8i32, Custom);
1238 setOperationAction(ISD::SETCC, MVT::v4i64, Custom);
1240 setOperationAction(ISD::SELECT, MVT::v4f64, Custom);
1241 setOperationAction(ISD::SELECT, MVT::v4i64, Custom);
1242 setOperationAction(ISD::SELECT, MVT::v8f32, Custom);
1244 setOperationAction(ISD::VSELECT, MVT::v4f64, Custom);
1245 setOperationAction(ISD::VSELECT, MVT::v4i64, Custom);
1246 setOperationAction(ISD::VSELECT, MVT::v8i32, Custom);
1247 setOperationAction(ISD::VSELECT, MVT::v8f32, Custom);
1249 setOperationAction(ISD::SIGN_EXTEND, MVT::v4i64, Custom);
1250 setOperationAction(ISD::SIGN_EXTEND, MVT::v8i32, Custom);
1251 setOperationAction(ISD::SIGN_EXTEND, MVT::v16i16, Custom);
1252 setOperationAction(ISD::ZERO_EXTEND, MVT::v4i64, Custom);
1253 setOperationAction(ISD::ZERO_EXTEND, MVT::v8i32, Custom);
1254 setOperationAction(ISD::ZERO_EXTEND, MVT::v16i16, Custom);
1255 setOperationAction(ISD::ANY_EXTEND, MVT::v4i64, Custom);
1256 setOperationAction(ISD::ANY_EXTEND, MVT::v8i32, Custom);
1257 setOperationAction(ISD::ANY_EXTEND, MVT::v16i16, Custom);
1258 setOperationAction(ISD::TRUNCATE, MVT::v16i8, Custom);
1259 setOperationAction(ISD::TRUNCATE, MVT::v8i16, Custom);
1260 setOperationAction(ISD::TRUNCATE, MVT::v4i32, Custom);
1262 if (Subtarget->hasFMA() || Subtarget->hasFMA4()) {
1263 setOperationAction(ISD::FMA, MVT::v8f32, Legal);
1264 setOperationAction(ISD::FMA, MVT::v4f64, Legal);
1265 setOperationAction(ISD::FMA, MVT::v4f32, Legal);
1266 setOperationAction(ISD::FMA, MVT::v2f64, Legal);
1267 setOperationAction(ISD::FMA, MVT::f32, Legal);
1268 setOperationAction(ISD::FMA, MVT::f64, Legal);
1271 if (Subtarget->hasInt256()) {
1272 setOperationAction(ISD::ADD, MVT::v4i64, Legal);
1273 setOperationAction(ISD::ADD, MVT::v8i32, Legal);
1274 setOperationAction(ISD::ADD, MVT::v16i16, Legal);
1275 setOperationAction(ISD::ADD, MVT::v32i8, Legal);
1277 setOperationAction(ISD::SUB, MVT::v4i64, Legal);
1278 setOperationAction(ISD::SUB, MVT::v8i32, Legal);
1279 setOperationAction(ISD::SUB, MVT::v16i16, Legal);
1280 setOperationAction(ISD::SUB, MVT::v32i8, Legal);
1282 setOperationAction(ISD::MUL, MVT::v4i64, Custom);
1283 setOperationAction(ISD::MUL, MVT::v8i32, Legal);
1284 setOperationAction(ISD::MUL, MVT::v16i16, Legal);
1285 // Don't lower v32i8 because there is no 128-bit byte mul
1287 setOperationAction(ISD::UMUL_LOHI, MVT::v8i32, Custom);
1288 setOperationAction(ISD::SMUL_LOHI, MVT::v8i32, Custom);
1289 setOperationAction(ISD::MULHU, MVT::v16i16, Legal);
1290 setOperationAction(ISD::MULHS, MVT::v16i16, Legal);
1292 setOperationAction(ISD::VSELECT, MVT::v16i16, Custom);
1293 setOperationAction(ISD::VSELECT, MVT::v32i8, Legal);
1295 setOperationAction(ISD::ADD, MVT::v4i64, Custom);
1296 setOperationAction(ISD::ADD, MVT::v8i32, Custom);
1297 setOperationAction(ISD::ADD, MVT::v16i16, Custom);
1298 setOperationAction(ISD::ADD, MVT::v32i8, Custom);
1300 setOperationAction(ISD::SUB, MVT::v4i64, Custom);
1301 setOperationAction(ISD::SUB, MVT::v8i32, Custom);
1302 setOperationAction(ISD::SUB, MVT::v16i16, Custom);
1303 setOperationAction(ISD::SUB, MVT::v32i8, Custom);
1305 setOperationAction(ISD::MUL, MVT::v4i64, Custom);
1306 setOperationAction(ISD::MUL, MVT::v8i32, Custom);
1307 setOperationAction(ISD::MUL, MVT::v16i16, Custom);
1308 // Don't lower v32i8 because there is no 128-bit byte mul
1311 // In the customized shift lowering, the legal cases in AVX2 will be
1313 setOperationAction(ISD::SRL, MVT::v4i64, Custom);
1314 setOperationAction(ISD::SRL, MVT::v8i32, Custom);
1316 setOperationAction(ISD::SHL, MVT::v4i64, Custom);
1317 setOperationAction(ISD::SHL, MVT::v8i32, Custom);
1319 setOperationAction(ISD::SRA, MVT::v8i32, Custom);
1321 // Custom lower several nodes for 256-bit types.
1322 for (int i = MVT::FIRST_VECTOR_VALUETYPE;
1323 i <= MVT::LAST_VECTOR_VALUETYPE; ++i) {
1324 MVT VT = (MVT::SimpleValueType)i;
1326 // Extract subvector is special because the value type
1327 // (result) is 128-bit but the source is 256-bit wide.
1328 if (VT.is128BitVector())
1329 setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Custom);
1331 // Do not attempt to custom lower other non-256-bit vectors
1332 if (!VT.is256BitVector())
1335 setOperationAction(ISD::BUILD_VECTOR, VT, Custom);
1336 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom);
1337 setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom);
1338 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom);
1339 setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Custom);
1340 setOperationAction(ISD::INSERT_SUBVECTOR, VT, Custom);
1341 setOperationAction(ISD::CONCAT_VECTORS, VT, Custom);
1344 // Promote v32i8, v16i16, v8i32 select, and, or, xor to v4i64.
1345 for (int i = MVT::v32i8; i != MVT::v4i64; ++i) {
1346 MVT VT = (MVT::SimpleValueType)i;
1348 // Do not attempt to promote non-256-bit vectors
1349 if (!VT.is256BitVector())
1352 setOperationAction(ISD::AND, VT, Promote);
1353 AddPromotedToType (ISD::AND, VT, MVT::v4i64);
1354 setOperationAction(ISD::OR, VT, Promote);
1355 AddPromotedToType (ISD::OR, VT, MVT::v4i64);
1356 setOperationAction(ISD::XOR, VT, Promote);
1357 AddPromotedToType (ISD::XOR, VT, MVT::v4i64);
1358 setOperationAction(ISD::LOAD, VT, Promote);
1359 AddPromotedToType (ISD::LOAD, VT, MVT::v4i64);
1360 setOperationAction(ISD::SELECT, VT, Promote);
1361 AddPromotedToType (ISD::SELECT, VT, MVT::v4i64);
1365 if (!TM.Options.UseSoftFloat && Subtarget->hasAVX512()) {
1366 addRegisterClass(MVT::v16i32, &X86::VR512RegClass);
1367 addRegisterClass(MVT::v16f32, &X86::VR512RegClass);
1368 addRegisterClass(MVT::v8i64, &X86::VR512RegClass);
1369 addRegisterClass(MVT::v8f64, &X86::VR512RegClass);
1371 addRegisterClass(MVT::i1, &X86::VK1RegClass);
1372 addRegisterClass(MVT::v8i1, &X86::VK8RegClass);
1373 addRegisterClass(MVT::v16i1, &X86::VK16RegClass);
1375 setOperationAction(ISD::BR_CC, MVT::i1, Expand);
1376 setOperationAction(ISD::SETCC, MVT::i1, Custom);
1377 setOperationAction(ISD::XOR, MVT::i1, Legal);
1378 setOperationAction(ISD::OR, MVT::i1, Legal);
1379 setOperationAction(ISD::AND, MVT::i1, Legal);
1380 setLoadExtAction(ISD::EXTLOAD, MVT::v8f32, Legal);
1381 setOperationAction(ISD::LOAD, MVT::v16f32, Legal);
1382 setOperationAction(ISD::LOAD, MVT::v8f64, Legal);
1383 setOperationAction(ISD::LOAD, MVT::v8i64, Legal);
1384 setOperationAction(ISD::LOAD, MVT::v16i32, Legal);
1385 setOperationAction(ISD::LOAD, MVT::v16i1, Legal);
1387 setOperationAction(ISD::FADD, MVT::v16f32, Legal);
1388 setOperationAction(ISD::FSUB, MVT::v16f32, Legal);
1389 setOperationAction(ISD::FMUL, MVT::v16f32, Legal);
1390 setOperationAction(ISD::FDIV, MVT::v16f32, Legal);
1391 setOperationAction(ISD::FSQRT, MVT::v16f32, Legal);
1392 setOperationAction(ISD::FNEG, MVT::v16f32, Custom);
1394 setOperationAction(ISD::FADD, MVT::v8f64, Legal);
1395 setOperationAction(ISD::FSUB, MVT::v8f64, Legal);
1396 setOperationAction(ISD::FMUL, MVT::v8f64, Legal);
1397 setOperationAction(ISD::FDIV, MVT::v8f64, Legal);
1398 setOperationAction(ISD::FSQRT, MVT::v8f64, Legal);
1399 setOperationAction(ISD::FNEG, MVT::v8f64, Custom);
1400 setOperationAction(ISD::FMA, MVT::v8f64, Legal);
1401 setOperationAction(ISD::FMA, MVT::v16f32, Legal);
1403 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Legal);
1404 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Legal);
1405 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Legal);
1406 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Legal);
1407 if (Subtarget->is64Bit()) {
1408 setOperationAction(ISD::FP_TO_UINT, MVT::i64, Legal);
1409 setOperationAction(ISD::FP_TO_SINT, MVT::i64, Legal);
1410 setOperationAction(ISD::SINT_TO_FP, MVT::i64, Legal);
1411 setOperationAction(ISD::UINT_TO_FP, MVT::i64, Legal);
1413 setOperationAction(ISD::FP_TO_SINT, MVT::v16i32, Legal);
1414 setOperationAction(ISD::FP_TO_UINT, MVT::v16i32, Legal);
1415 setOperationAction(ISD::FP_TO_UINT, MVT::v8i32, Legal);
1416 setOperationAction(ISD::FP_TO_UINT, MVT::v4i32, Legal);
1417 setOperationAction(ISD::SINT_TO_FP, MVT::v16i32, Legal);
1418 setOperationAction(ISD::UINT_TO_FP, MVT::v16i32, Legal);
1419 setOperationAction(ISD::UINT_TO_FP, MVT::v8i32, Legal);
1420 setOperationAction(ISD::UINT_TO_FP, MVT::v4i32, Legal);
1421 setOperationAction(ISD::FP_ROUND, MVT::v8f32, Legal);
1422 setOperationAction(ISD::FP_EXTEND, MVT::v8f32, Legal);
1424 setOperationAction(ISD::TRUNCATE, MVT::i1, Custom);
1425 setOperationAction(ISD::TRUNCATE, MVT::v16i8, Custom);
1426 setOperationAction(ISD::TRUNCATE, MVT::v8i32, Custom);
1427 setOperationAction(ISD::TRUNCATE, MVT::v8i1, Custom);
1428 setOperationAction(ISD::TRUNCATE, MVT::v16i1, Custom);
1429 setOperationAction(ISD::TRUNCATE, MVT::v16i16, Custom);
1430 setOperationAction(ISD::ZERO_EXTEND, MVT::v16i32, Custom);
1431 setOperationAction(ISD::ZERO_EXTEND, MVT::v8i64, Custom);
1432 setOperationAction(ISD::SIGN_EXTEND, MVT::v16i32, Custom);
1433 setOperationAction(ISD::SIGN_EXTEND, MVT::v8i64, Custom);
1434 setOperationAction(ISD::SIGN_EXTEND, MVT::v16i8, Custom);
1435 setOperationAction(ISD::SIGN_EXTEND, MVT::v8i16, Custom);
1436 setOperationAction(ISD::SIGN_EXTEND, MVT::v16i16, Custom);
1438 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8f64, Custom);
1439 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i64, Custom);
1440 setOperationAction(ISD::CONCAT_VECTORS, MVT::v16f32, Custom);
1441 setOperationAction(ISD::CONCAT_VECTORS, MVT::v16i32, Custom);
1442 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i1, Custom);
1443 setOperationAction(ISD::CONCAT_VECTORS, MVT::v16i1, Legal);
1445 setOperationAction(ISD::SETCC, MVT::v16i1, Custom);
1446 setOperationAction(ISD::SETCC, MVT::v8i1, Custom);
1448 setOperationAction(ISD::MUL, MVT::v8i64, Custom);
1450 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v8i1, Custom);
1451 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v16i1, Custom);
1452 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i1, Custom);
1453 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i1, Custom);
1454 setOperationAction(ISD::BUILD_VECTOR, MVT::v8i1, Custom);
1455 setOperationAction(ISD::BUILD_VECTOR, MVT::v16i1, Custom);
1456 setOperationAction(ISD::SELECT, MVT::v8f64, Custom);
1457 setOperationAction(ISD::SELECT, MVT::v8i64, Custom);
1458 setOperationAction(ISD::SELECT, MVT::v16f32, Custom);
1460 setOperationAction(ISD::ADD, MVT::v8i64, Legal);
1461 setOperationAction(ISD::ADD, MVT::v16i32, Legal);
1463 setOperationAction(ISD::SUB, MVT::v8i64, Legal);
1464 setOperationAction(ISD::SUB, MVT::v16i32, Legal);
1466 setOperationAction(ISD::MUL, MVT::v16i32, Legal);
1468 setOperationAction(ISD::SRL, MVT::v8i64, Custom);
1469 setOperationAction(ISD::SRL, MVT::v16i32, Custom);
1471 setOperationAction(ISD::SHL, MVT::v8i64, Custom);
1472 setOperationAction(ISD::SHL, MVT::v16i32, Custom);
1474 setOperationAction(ISD::SRA, MVT::v8i64, Custom);
1475 setOperationAction(ISD::SRA, MVT::v16i32, Custom);
1477 setOperationAction(ISD::AND, MVT::v8i64, Legal);
1478 setOperationAction(ISD::OR, MVT::v8i64, Legal);
1479 setOperationAction(ISD::XOR, MVT::v8i64, Legal);
1480 setOperationAction(ISD::AND, MVT::v16i32, Legal);
1481 setOperationAction(ISD::OR, MVT::v16i32, Legal);
1482 setOperationAction(ISD::XOR, MVT::v16i32, Legal);
1484 if (Subtarget->hasCDI()) {
1485 setOperationAction(ISD::CTLZ, MVT::v8i64, Legal);
1486 setOperationAction(ISD::CTLZ, MVT::v16i32, Legal);
1489 // Custom lower several nodes.
1490 for (int i = MVT::FIRST_VECTOR_VALUETYPE;
1491 i <= MVT::LAST_VECTOR_VALUETYPE; ++i) {
1492 MVT VT = (MVT::SimpleValueType)i;
1494 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
1495 // Extract subvector is special because the value type
1496 // (result) is 256/128-bit but the source is 512-bit wide.
1497 if (VT.is128BitVector() || VT.is256BitVector())
1498 setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Custom);
1500 if (VT.getVectorElementType() == MVT::i1)
1501 setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Legal);
1503 // Do not attempt to custom lower other non-512-bit vectors
1504 if (!VT.is512BitVector())
1507 if ( EltSize >= 32) {
1508 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom);
1509 setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom);
1510 setOperationAction(ISD::BUILD_VECTOR, VT, Custom);
1511 setOperationAction(ISD::VSELECT, VT, Legal);
1512 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom);
1513 setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Custom);
1514 setOperationAction(ISD::INSERT_SUBVECTOR, VT, Custom);
1517 for (int i = MVT::v32i8; i != MVT::v8i64; ++i) {
1518 MVT VT = (MVT::SimpleValueType)i;
1520 // Do not attempt to promote non-256-bit vectors
1521 if (!VT.is512BitVector())
1524 setOperationAction(ISD::SELECT, VT, Promote);
1525 AddPromotedToType (ISD::SELECT, VT, MVT::v8i64);
1529 if (!TM.Options.UseSoftFloat && Subtarget->hasBWI()) {
1530 addRegisterClass(MVT::v32i1, &X86::VK32RegClass);
1531 addRegisterClass(MVT::v64i1, &X86::VK64RegClass);
1534 // SIGN_EXTEND_INREGs are evaluated by the extend type. Handle the expansion
1535 // of this type with custom code.
1536 for (int VT = MVT::FIRST_VECTOR_VALUETYPE;
1537 VT != MVT::LAST_VECTOR_VALUETYPE; VT++) {
1538 setOperationAction(ISD::SIGN_EXTEND_INREG, (MVT::SimpleValueType)VT,
1542 // We want to custom lower some of our intrinsics.
1543 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
1544 setOperationAction(ISD::INTRINSIC_W_CHAIN, MVT::Other, Custom);
1545 setOperationAction(ISD::INTRINSIC_VOID, MVT::Other, Custom);
1546 if (!Subtarget->is64Bit())
1547 setOperationAction(ISD::INTRINSIC_W_CHAIN, MVT::i64, Custom);
1549 // Only custom-lower 64-bit SADDO and friends on 64-bit because we don't
1550 // handle type legalization for these operations here.
1552 // FIXME: We really should do custom legalization for addition and
1553 // subtraction on x86-32 once PR3203 is fixed. We really can't do much better
1554 // than generic legalization for 64-bit multiplication-with-overflow, though.
1555 for (unsigned i = 0, e = 3+Subtarget->is64Bit(); i != e; ++i) {
1556 // Add/Sub/Mul with overflow operations are custom lowered.
1558 setOperationAction(ISD::SADDO, VT, Custom);
1559 setOperationAction(ISD::UADDO, VT, Custom);
1560 setOperationAction(ISD::SSUBO, VT, Custom);
1561 setOperationAction(ISD::USUBO, VT, Custom);
1562 setOperationAction(ISD::SMULO, VT, Custom);
1563 setOperationAction(ISD::UMULO, VT, Custom);
1566 // There are no 8-bit 3-address imul/mul instructions
1567 setOperationAction(ISD::SMULO, MVT::i8, Expand);
1568 setOperationAction(ISD::UMULO, MVT::i8, Expand);
1570 if (!Subtarget->is64Bit()) {
1571 // These libcalls are not available in 32-bit.
1572 setLibcallName(RTLIB::SHL_I128, nullptr);
1573 setLibcallName(RTLIB::SRL_I128, nullptr);
1574 setLibcallName(RTLIB::SRA_I128, nullptr);
1577 // Combine sin / cos into one node or libcall if possible.
1578 if (Subtarget->hasSinCos()) {
1579 setLibcallName(RTLIB::SINCOS_F32, "sincosf");
1580 setLibcallName(RTLIB::SINCOS_F64, "sincos");
1581 if (Subtarget->isTargetDarwin()) {
1582 // For MacOSX, we don't want to the normal expansion of a libcall to
1583 // sincos. We want to issue a libcall to __sincos_stret to avoid memory
1585 setOperationAction(ISD::FSINCOS, MVT::f64, Custom);
1586 setOperationAction(ISD::FSINCOS, MVT::f32, Custom);
1590 if (Subtarget->isTargetWin64()) {
1591 setOperationAction(ISD::SDIV, MVT::i128, Custom);
1592 setOperationAction(ISD::UDIV, MVT::i128, Custom);
1593 setOperationAction(ISD::SREM, MVT::i128, Custom);
1594 setOperationAction(ISD::UREM, MVT::i128, Custom);
1595 setOperationAction(ISD::SDIVREM, MVT::i128, Custom);
1596 setOperationAction(ISD::UDIVREM, MVT::i128, Custom);
1599 // We have target-specific dag combine patterns for the following nodes:
1600 setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
1601 setTargetDAGCombine(ISD::EXTRACT_VECTOR_ELT);
1602 setTargetDAGCombine(ISD::VSELECT);
1603 setTargetDAGCombine(ISD::SELECT);
1604 setTargetDAGCombine(ISD::SHL);
1605 setTargetDAGCombine(ISD::SRA);
1606 setTargetDAGCombine(ISD::SRL);
1607 setTargetDAGCombine(ISD::OR);
1608 setTargetDAGCombine(ISD::AND);
1609 setTargetDAGCombine(ISD::ADD);
1610 setTargetDAGCombine(ISD::FADD);
1611 setTargetDAGCombine(ISD::FSUB);
1612 setTargetDAGCombine(ISD::FMA);
1613 setTargetDAGCombine(ISD::SUB);
1614 setTargetDAGCombine(ISD::LOAD);
1615 setTargetDAGCombine(ISD::STORE);
1616 setTargetDAGCombine(ISD::ZERO_EXTEND);
1617 setTargetDAGCombine(ISD::ANY_EXTEND);
1618 setTargetDAGCombine(ISD::SIGN_EXTEND);
1619 setTargetDAGCombine(ISD::SIGN_EXTEND_INREG);
1620 setTargetDAGCombine(ISD::TRUNCATE);
1621 setTargetDAGCombine(ISD::SINT_TO_FP);
1622 setTargetDAGCombine(ISD::SETCC);
1623 setTargetDAGCombine(ISD::INTRINSIC_WO_CHAIN);
1624 setTargetDAGCombine(ISD::BUILD_VECTOR);
1625 if (Subtarget->is64Bit())
1626 setTargetDAGCombine(ISD::MUL);
1627 setTargetDAGCombine(ISD::XOR);
1629 computeRegisterProperties();
1631 // On Darwin, -Os means optimize for size without hurting performance,
1632 // do not reduce the limit.
1633 MaxStoresPerMemset = 16; // For @llvm.memset -> sequence of stores
1634 MaxStoresPerMemsetOptSize = Subtarget->isTargetDarwin() ? 16 : 8;
1635 MaxStoresPerMemcpy = 8; // For @llvm.memcpy -> sequence of stores
1636 MaxStoresPerMemcpyOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
1637 MaxStoresPerMemmove = 8; // For @llvm.memmove -> sequence of stores
1638 MaxStoresPerMemmoveOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
1639 setPrefLoopAlignment(4); // 2^4 bytes.
1641 // Predictable cmov don't hurt on atom because it's in-order.
1642 PredictableSelectIsExpensive = !Subtarget->isAtom();
1644 setPrefFunctionAlignment(4); // 2^4 bytes.
1647 // This has so far only been implemented for 64-bit MachO.
1648 bool X86TargetLowering::useLoadStackGuardNode() const {
1649 return Subtarget->getTargetTriple().getObjectFormat() == Triple::MachO &&
1650 Subtarget->is64Bit();
1653 TargetLoweringBase::LegalizeTypeAction
1654 X86TargetLowering::getPreferredVectorAction(EVT VT) const {
1655 if (ExperimentalVectorWideningLegalization &&
1656 VT.getVectorNumElements() != 1 &&
1657 VT.getVectorElementType().getSimpleVT() != MVT::i1)
1658 return TypeWidenVector;
1660 return TargetLoweringBase::getPreferredVectorAction(VT);
1663 EVT X86TargetLowering::getSetCCResultType(LLVMContext &, EVT VT) const {
1665 return Subtarget->hasAVX512() ? MVT::i1: MVT::i8;
1667 if (Subtarget->hasAVX512())
1668 switch(VT.getVectorNumElements()) {
1669 case 8: return MVT::v8i1;
1670 case 16: return MVT::v16i1;
1673 return VT.changeVectorElementTypeToInteger();
1676 /// getMaxByValAlign - Helper for getByValTypeAlignment to determine
1677 /// the desired ByVal argument alignment.
1678 static void getMaxByValAlign(Type *Ty, unsigned &MaxAlign) {
1681 if (VectorType *VTy = dyn_cast<VectorType>(Ty)) {
1682 if (VTy->getBitWidth() == 128)
1684 } else if (ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
1685 unsigned EltAlign = 0;
1686 getMaxByValAlign(ATy->getElementType(), EltAlign);
1687 if (EltAlign > MaxAlign)
1688 MaxAlign = EltAlign;
1689 } else if (StructType *STy = dyn_cast<StructType>(Ty)) {
1690 for (unsigned i = 0, e = STy->getNumElements(); i != e; ++i) {
1691 unsigned EltAlign = 0;
1692 getMaxByValAlign(STy->getElementType(i), EltAlign);
1693 if (EltAlign > MaxAlign)
1694 MaxAlign = EltAlign;
1701 /// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
1702 /// function arguments in the caller parameter area. For X86, aggregates
1703 /// that contain SSE vectors are placed at 16-byte boundaries while the rest
1704 /// are at 4-byte boundaries.
1705 unsigned X86TargetLowering::getByValTypeAlignment(Type *Ty) const {
1706 if (Subtarget->is64Bit()) {
1707 // Max of 8 and alignment of type.
1708 unsigned TyAlign = TD->getABITypeAlignment(Ty);
1715 if (Subtarget->hasSSE1())
1716 getMaxByValAlign(Ty, Align);
1720 /// getOptimalMemOpType - Returns the target specific optimal type for load
1721 /// and store operations as a result of memset, memcpy, and memmove
1722 /// lowering. If DstAlign is zero that means it's safe to destination
1723 /// alignment can satisfy any constraint. Similarly if SrcAlign is zero it
1724 /// means there isn't a need to check it against alignment requirement,
1725 /// probably because the source does not need to be loaded. If 'IsMemset' is
1726 /// true, that means it's expanding a memset. If 'ZeroMemset' is true, that
1727 /// means it's a memset of zero. 'MemcpyStrSrc' indicates whether the memcpy
1728 /// source is constant so it does not need to be loaded.
1729 /// It returns EVT::Other if the type should be determined using generic
1730 /// target-independent logic.
1732 X86TargetLowering::getOptimalMemOpType(uint64_t Size,
1733 unsigned DstAlign, unsigned SrcAlign,
1734 bool IsMemset, bool ZeroMemset,
1736 MachineFunction &MF) const {
1737 const Function *F = MF.getFunction();
1738 if ((!IsMemset || ZeroMemset) &&
1739 !F->getAttributes().hasAttribute(AttributeSet::FunctionIndex,
1740 Attribute::NoImplicitFloat)) {
1742 (Subtarget->isUnalignedMemAccessFast() ||
1743 ((DstAlign == 0 || DstAlign >= 16) &&
1744 (SrcAlign == 0 || SrcAlign >= 16)))) {
1746 if (Subtarget->hasInt256())
1748 if (Subtarget->hasFp256())
1751 if (Subtarget->hasSSE2())
1753 if (Subtarget->hasSSE1())
1755 } else if (!MemcpyStrSrc && Size >= 8 &&
1756 !Subtarget->is64Bit() &&
1757 Subtarget->hasSSE2()) {
1758 // Do not use f64 to lower memcpy if source is string constant. It's
1759 // better to use i32 to avoid the loads.
1763 if (Subtarget->is64Bit() && Size >= 8)
1768 bool X86TargetLowering::isSafeMemOpType(MVT VT) const {
1770 return X86ScalarSSEf32;
1771 else if (VT == MVT::f64)
1772 return X86ScalarSSEf64;
1777 X86TargetLowering::allowsMisalignedMemoryAccesses(EVT VT,
1782 *Fast = Subtarget->isUnalignedMemAccessFast();
1786 /// getJumpTableEncoding - Return the entry encoding for a jump table in the
1787 /// current function. The returned value is a member of the
1788 /// MachineJumpTableInfo::JTEntryKind enum.
1789 unsigned X86TargetLowering::getJumpTableEncoding() const {
1790 // In GOT pic mode, each entry in the jump table is emitted as a @GOTOFF
1792 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1793 Subtarget->isPICStyleGOT())
1794 return MachineJumpTableInfo::EK_Custom32;
1796 // Otherwise, use the normal jump table encoding heuristics.
1797 return TargetLowering::getJumpTableEncoding();
1801 X86TargetLowering::LowerCustomJumpTableEntry(const MachineJumpTableInfo *MJTI,
1802 const MachineBasicBlock *MBB,
1803 unsigned uid,MCContext &Ctx) const{
1804 assert(MBB->getParent()->getTarget().getRelocationModel() == Reloc::PIC_ &&
1805 Subtarget->isPICStyleGOT());
1806 // In 32-bit ELF systems, our jump table entries are formed with @GOTOFF
1808 return MCSymbolRefExpr::Create(MBB->getSymbol(),
1809 MCSymbolRefExpr::VK_GOTOFF, Ctx);
1812 /// getPICJumpTableRelocaBase - Returns relocation base for the given PIC
1814 SDValue X86TargetLowering::getPICJumpTableRelocBase(SDValue Table,
1815 SelectionDAG &DAG) const {
1816 if (!Subtarget->is64Bit())
1817 // This doesn't have SDLoc associated with it, but is not really the
1818 // same as a Register.
1819 return DAG.getNode(X86ISD::GlobalBaseReg, SDLoc(), getPointerTy());
1823 /// getPICJumpTableRelocBaseExpr - This returns the relocation base for the
1824 /// given PIC jumptable, the same as getPICJumpTableRelocBase, but as an
1826 const MCExpr *X86TargetLowering::
1827 getPICJumpTableRelocBaseExpr(const MachineFunction *MF, unsigned JTI,
1828 MCContext &Ctx) const {
1829 // X86-64 uses RIP relative addressing based on the jump table label.
1830 if (Subtarget->isPICStyleRIPRel())
1831 return TargetLowering::getPICJumpTableRelocBaseExpr(MF, JTI, Ctx);
1833 // Otherwise, the reference is relative to the PIC base.
1834 return MCSymbolRefExpr::Create(MF->getPICBaseSymbol(), Ctx);
1837 // FIXME: Why this routine is here? Move to RegInfo!
1838 std::pair<const TargetRegisterClass*, uint8_t>
1839 X86TargetLowering::findRepresentativeClass(MVT VT) const{
1840 const TargetRegisterClass *RRC = nullptr;
1842 switch (VT.SimpleTy) {
1844 return TargetLowering::findRepresentativeClass(VT);
1845 case MVT::i8: case MVT::i16: case MVT::i32: case MVT::i64:
1846 RRC = Subtarget->is64Bit() ?
1847 (const TargetRegisterClass*)&X86::GR64RegClass :
1848 (const TargetRegisterClass*)&X86::GR32RegClass;
1851 RRC = &X86::VR64RegClass;
1853 case MVT::f32: case MVT::f64:
1854 case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64:
1855 case MVT::v4f32: case MVT::v2f64:
1856 case MVT::v32i8: case MVT::v8i32: case MVT::v4i64: case MVT::v8f32:
1858 RRC = &X86::VR128RegClass;
1861 return std::make_pair(RRC, Cost);
1864 bool X86TargetLowering::getStackCookieLocation(unsigned &AddressSpace,
1865 unsigned &Offset) const {
1866 if (!Subtarget->isTargetLinux())
1869 if (Subtarget->is64Bit()) {
1870 // %fs:0x28, unless we're using a Kernel code model, in which case it's %gs:
1872 if (getTargetMachine().getCodeModel() == CodeModel::Kernel)
1884 bool X86TargetLowering::isNoopAddrSpaceCast(unsigned SrcAS,
1885 unsigned DestAS) const {
1886 assert(SrcAS != DestAS && "Expected different address spaces!");
1888 return SrcAS < 256 && DestAS < 256;
1891 //===----------------------------------------------------------------------===//
1892 // Return Value Calling Convention Implementation
1893 //===----------------------------------------------------------------------===//
1895 #include "X86GenCallingConv.inc"
1898 X86TargetLowering::CanLowerReturn(CallingConv::ID CallConv,
1899 MachineFunction &MF, bool isVarArg,
1900 const SmallVectorImpl<ISD::OutputArg> &Outs,
1901 LLVMContext &Context) const {
1902 SmallVector<CCValAssign, 16> RVLocs;
1903 CCState CCInfo(CallConv, isVarArg, MF, RVLocs, Context);
1904 return CCInfo.CheckReturn(Outs, RetCC_X86);
1907 const MCPhysReg *X86TargetLowering::getScratchRegisters(CallingConv::ID) const {
1908 static const MCPhysReg ScratchRegs[] = { X86::R11, 0 };
1913 X86TargetLowering::LowerReturn(SDValue Chain,
1914 CallingConv::ID CallConv, bool isVarArg,
1915 const SmallVectorImpl<ISD::OutputArg> &Outs,
1916 const SmallVectorImpl<SDValue> &OutVals,
1917 SDLoc dl, SelectionDAG &DAG) const {
1918 MachineFunction &MF = DAG.getMachineFunction();
1919 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1921 SmallVector<CCValAssign, 16> RVLocs;
1922 CCState CCInfo(CallConv, isVarArg, MF, RVLocs, *DAG.getContext());
1923 CCInfo.AnalyzeReturn(Outs, RetCC_X86);
1926 SmallVector<SDValue, 6> RetOps;
1927 RetOps.push_back(Chain); // Operand #0 = Chain (updated below)
1928 // Operand #1 = Bytes To Pop
1929 RetOps.push_back(DAG.getTargetConstant(FuncInfo->getBytesToPopOnReturn(),
1932 // Copy the result values into the output registers.
1933 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1934 CCValAssign &VA = RVLocs[i];
1935 assert(VA.isRegLoc() && "Can only return in registers!");
1936 SDValue ValToCopy = OutVals[i];
1937 EVT ValVT = ValToCopy.getValueType();
1939 // Promote values to the appropriate types
1940 if (VA.getLocInfo() == CCValAssign::SExt)
1941 ValToCopy = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), ValToCopy);
1942 else if (VA.getLocInfo() == CCValAssign::ZExt)
1943 ValToCopy = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), ValToCopy);
1944 else if (VA.getLocInfo() == CCValAssign::AExt)
1945 ValToCopy = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), ValToCopy);
1946 else if (VA.getLocInfo() == CCValAssign::BCvt)
1947 ValToCopy = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), ValToCopy);
1949 assert(VA.getLocInfo() != CCValAssign::FPExt &&
1950 "Unexpected FP-extend for return value.");
1952 // If this is x86-64, and we disabled SSE, we can't return FP values,
1953 // or SSE or MMX vectors.
1954 if ((ValVT == MVT::f32 || ValVT == MVT::f64 ||
1955 VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) &&
1956 (Subtarget->is64Bit() && !Subtarget->hasSSE1())) {
1957 report_fatal_error("SSE register return with SSE disabled");
1959 // Likewise we can't return F64 values with SSE1 only. gcc does so, but
1960 // llvm-gcc has never done it right and no one has noticed, so this
1961 // should be OK for now.
1962 if (ValVT == MVT::f64 &&
1963 (Subtarget->is64Bit() && !Subtarget->hasSSE2()))
1964 report_fatal_error("SSE2 register return with SSE2 disabled");
1966 // Returns in ST0/ST1 are handled specially: these are pushed as operands to
1967 // the RET instruction and handled by the FP Stackifier.
1968 if (VA.getLocReg() == X86::FP0 ||
1969 VA.getLocReg() == X86::FP1) {
1970 // If this is a copy from an xmm register to ST(0), use an FPExtend to
1971 // change the value to the FP stack register class.
1972 if (isScalarFPTypeInSSEReg(VA.getValVT()))
1973 ValToCopy = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f80, ValToCopy);
1974 RetOps.push_back(ValToCopy);
1975 // Don't emit a copytoreg.
1979 // 64-bit vector (MMX) values are returned in XMM0 / XMM1 except for v1i64
1980 // which is returned in RAX / RDX.
1981 if (Subtarget->is64Bit()) {
1982 if (ValVT == MVT::x86mmx) {
1983 if (VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) {
1984 ValToCopy = DAG.getNode(ISD::BITCAST, dl, MVT::i64, ValToCopy);
1985 ValToCopy = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64,
1987 // If we don't have SSE2 available, convert to v4f32 so the generated
1988 // register is legal.
1989 if (!Subtarget->hasSSE2())
1990 ValToCopy = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32,ValToCopy);
1995 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), ValToCopy, Flag);
1996 Flag = Chain.getValue(1);
1997 RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
2000 // The x86-64 ABIs require that for returning structs by value we copy
2001 // the sret argument into %rax/%eax (depending on ABI) for the return.
2002 // Win32 requires us to put the sret argument to %eax as well.
2003 // We saved the argument into a virtual register in the entry block,
2004 // so now we copy the value out and into %rax/%eax.
2005 if (DAG.getMachineFunction().getFunction()->hasStructRetAttr() &&
2006 (Subtarget->is64Bit() || Subtarget->isTargetKnownWindowsMSVC())) {
2007 MachineFunction &MF = DAG.getMachineFunction();
2008 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
2009 unsigned Reg = FuncInfo->getSRetReturnReg();
2011 "SRetReturnReg should have been set in LowerFormalArguments().");
2012 SDValue Val = DAG.getCopyFromReg(Chain, dl, Reg, getPointerTy());
2015 = (Subtarget->is64Bit() && !Subtarget->isTarget64BitILP32()) ?
2016 X86::RAX : X86::EAX;
2017 Chain = DAG.getCopyToReg(Chain, dl, RetValReg, Val, Flag);
2018 Flag = Chain.getValue(1);
2020 // RAX/EAX now acts like a return value.
2021 RetOps.push_back(DAG.getRegister(RetValReg, getPointerTy()));
2024 RetOps[0] = Chain; // Update chain.
2026 // Add the flag if we have it.
2028 RetOps.push_back(Flag);
2030 return DAG.getNode(X86ISD::RET_FLAG, dl, MVT::Other, RetOps);
2033 bool X86TargetLowering::isUsedByReturnOnly(SDNode *N, SDValue &Chain) const {
2034 if (N->getNumValues() != 1)
2036 if (!N->hasNUsesOfValue(1, 0))
2039 SDValue TCChain = Chain;
2040 SDNode *Copy = *N->use_begin();
2041 if (Copy->getOpcode() == ISD::CopyToReg) {
2042 // If the copy has a glue operand, we conservatively assume it isn't safe to
2043 // perform a tail call.
2044 if (Copy->getOperand(Copy->getNumOperands()-1).getValueType() == MVT::Glue)
2046 TCChain = Copy->getOperand(0);
2047 } else if (Copy->getOpcode() != ISD::FP_EXTEND)
2050 bool HasRet = false;
2051 for (SDNode::use_iterator UI = Copy->use_begin(), UE = Copy->use_end();
2053 if (UI->getOpcode() != X86ISD::RET_FLAG)
2066 X86TargetLowering::getTypeForExtArgOrReturn(LLVMContext &Context, EVT VT,
2067 ISD::NodeType ExtendKind) const {
2069 // TODO: Is this also valid on 32-bit?
2070 if (Subtarget->is64Bit() && VT == MVT::i1 && ExtendKind == ISD::ZERO_EXTEND)
2071 ReturnMVT = MVT::i8;
2073 ReturnMVT = MVT::i32;
2075 EVT MinVT = getRegisterType(Context, ReturnMVT);
2076 return VT.bitsLT(MinVT) ? MinVT : VT;
2079 /// LowerCallResult - Lower the result values of a call into the
2080 /// appropriate copies out of appropriate physical registers.
2083 X86TargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
2084 CallingConv::ID CallConv, bool isVarArg,
2085 const SmallVectorImpl<ISD::InputArg> &Ins,
2086 SDLoc dl, SelectionDAG &DAG,
2087 SmallVectorImpl<SDValue> &InVals) const {
2089 // Assign locations to each value returned by this call.
2090 SmallVector<CCValAssign, 16> RVLocs;
2091 bool Is64Bit = Subtarget->is64Bit();
2092 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs,
2094 CCInfo.AnalyzeCallResult(Ins, RetCC_X86);
2096 // Copy all of the result registers out of their specified physreg.
2097 for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) {
2098 CCValAssign &VA = RVLocs[i];
2099 EVT CopyVT = VA.getValVT();
2101 // If this is x86-64, and we disabled SSE, we can't return FP values
2102 if ((CopyVT == MVT::f32 || CopyVT == MVT::f64) &&
2103 ((Is64Bit || Ins[i].Flags.isInReg()) && !Subtarget->hasSSE1())) {
2104 report_fatal_error("SSE register return with SSE disabled");
2107 // If we prefer to use the value in xmm registers, copy it out as f80 and
2108 // use a truncate to move it from fp stack reg to xmm reg.
2109 if ((VA.getLocReg() == X86::FP0 || VA.getLocReg() == X86::FP1) &&
2110 isScalarFPTypeInSSEReg(VA.getValVT()))
2113 Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
2114 CopyVT, InFlag).getValue(1);
2115 SDValue Val = Chain.getValue(0);
2117 if (CopyVT != VA.getValVT())
2118 Val = DAG.getNode(ISD::FP_ROUND, dl, VA.getValVT(), Val,
2119 // This truncation won't change the value.
2120 DAG.getIntPtrConstant(1));
2122 InFlag = Chain.getValue(2);
2123 InVals.push_back(Val);
2129 //===----------------------------------------------------------------------===//
2130 // C & StdCall & Fast Calling Convention implementation
2131 //===----------------------------------------------------------------------===//
2132 // StdCall calling convention seems to be standard for many Windows' API
2133 // routines and around. It differs from C calling convention just a little:
2134 // callee should clean up the stack, not caller. Symbols should be also
2135 // decorated in some fancy way :) It doesn't support any vector arguments.
2136 // For info on fast calling convention see Fast Calling Convention (tail call)
2137 // implementation LowerX86_32FastCCCallTo.
2139 /// CallIsStructReturn - Determines whether a call uses struct return
2141 enum StructReturnType {
2146 static StructReturnType
2147 callIsStructReturn(const SmallVectorImpl<ISD::OutputArg> &Outs) {
2149 return NotStructReturn;
2151 const ISD::ArgFlagsTy &Flags = Outs[0].Flags;
2152 if (!Flags.isSRet())
2153 return NotStructReturn;
2154 if (Flags.isInReg())
2155 return RegStructReturn;
2156 return StackStructReturn;
2159 /// ArgsAreStructReturn - Determines whether a function uses struct
2160 /// return semantics.
2161 static StructReturnType
2162 argsAreStructReturn(const SmallVectorImpl<ISD::InputArg> &Ins) {
2164 return NotStructReturn;
2166 const ISD::ArgFlagsTy &Flags = Ins[0].Flags;
2167 if (!Flags.isSRet())
2168 return NotStructReturn;
2169 if (Flags.isInReg())
2170 return RegStructReturn;
2171 return StackStructReturn;
2174 /// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
2175 /// by "Src" to address "Dst" with size and alignment information specified by
2176 /// the specific parameter attribute. The copy will be passed as a byval
2177 /// function parameter.
2179 CreateCopyOfByValArgument(SDValue Src, SDValue Dst, SDValue Chain,
2180 ISD::ArgFlagsTy Flags, SelectionDAG &DAG,
2182 SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), MVT::i32);
2184 return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
2185 /*isVolatile*/false, /*AlwaysInline=*/true,
2186 MachinePointerInfo(), MachinePointerInfo());
2189 /// IsTailCallConvention - Return true if the calling convention is one that
2190 /// supports tail call optimization.
2191 static bool IsTailCallConvention(CallingConv::ID CC) {
2192 return (CC == CallingConv::Fast || CC == CallingConv::GHC ||
2193 CC == CallingConv::HiPE);
2196 /// \brief Return true if the calling convention is a C calling convention.
2197 static bool IsCCallConvention(CallingConv::ID CC) {
2198 return (CC == CallingConv::C || CC == CallingConv::X86_64_Win64 ||
2199 CC == CallingConv::X86_64_SysV);
2202 bool X86TargetLowering::mayBeEmittedAsTailCall(CallInst *CI) const {
2203 if (!CI->isTailCall() || getTargetMachine().Options.DisableTailCalls)
2207 CallingConv::ID CalleeCC = CS.getCallingConv();
2208 if (!IsTailCallConvention(CalleeCC) && !IsCCallConvention(CalleeCC))
2214 /// FuncIsMadeTailCallSafe - Return true if the function is being made into
2215 /// a tailcall target by changing its ABI.
2216 static bool FuncIsMadeTailCallSafe(CallingConv::ID CC,
2217 bool GuaranteedTailCallOpt) {
2218 return GuaranteedTailCallOpt && IsTailCallConvention(CC);
2222 X86TargetLowering::LowerMemArgument(SDValue Chain,
2223 CallingConv::ID CallConv,
2224 const SmallVectorImpl<ISD::InputArg> &Ins,
2225 SDLoc dl, SelectionDAG &DAG,
2226 const CCValAssign &VA,
2227 MachineFrameInfo *MFI,
2229 // Create the nodes corresponding to a load from this parameter slot.
2230 ISD::ArgFlagsTy Flags = Ins[i].Flags;
2231 bool AlwaysUseMutable = FuncIsMadeTailCallSafe(
2232 CallConv, DAG.getTarget().Options.GuaranteedTailCallOpt);
2233 bool isImmutable = !AlwaysUseMutable && !Flags.isByVal();
2236 // If value is passed by pointer we have address passed instead of the value
2238 if (VA.getLocInfo() == CCValAssign::Indirect)
2239 ValVT = VA.getLocVT();
2241 ValVT = VA.getValVT();
2243 // FIXME: For now, all byval parameter objects are marked mutable. This can be
2244 // changed with more analysis.
2245 // In case of tail call optimization mark all arguments mutable. Since they
2246 // could be overwritten by lowering of arguments in case of a tail call.
2247 if (Flags.isByVal()) {
2248 unsigned Bytes = Flags.getByValSize();
2249 if (Bytes == 0) Bytes = 1; // Don't create zero-sized stack objects.
2250 int FI = MFI->CreateFixedObject(Bytes, VA.getLocMemOffset(), isImmutable);
2251 return DAG.getFrameIndex(FI, getPointerTy());
2253 int FI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
2254 VA.getLocMemOffset(), isImmutable);
2255 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2256 return DAG.getLoad(ValVT, dl, Chain, FIN,
2257 MachinePointerInfo::getFixedStack(FI),
2258 false, false, false, 0);
2263 X86TargetLowering::LowerFormalArguments(SDValue Chain,
2264 CallingConv::ID CallConv,
2266 const SmallVectorImpl<ISD::InputArg> &Ins,
2269 SmallVectorImpl<SDValue> &InVals)
2271 MachineFunction &MF = DAG.getMachineFunction();
2272 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
2274 const Function* Fn = MF.getFunction();
2275 if (Fn->hasExternalLinkage() &&
2276 Subtarget->isTargetCygMing() &&
2277 Fn->getName() == "main")
2278 FuncInfo->setForceFramePointer(true);
2280 MachineFrameInfo *MFI = MF.getFrameInfo();
2281 bool Is64Bit = Subtarget->is64Bit();
2282 bool IsWin64 = Subtarget->isCallingConvWin64(CallConv);
2284 assert(!(isVarArg && IsTailCallConvention(CallConv)) &&
2285 "Var args not supported with calling convention fastcc, ghc or hipe");
2287 // Assign locations to all of the incoming arguments.
2288 SmallVector<CCValAssign, 16> ArgLocs;
2289 CCState CCInfo(CallConv, isVarArg, MF, ArgLocs, *DAG.getContext());
2291 // Allocate shadow area for Win64
2293 CCInfo.AllocateStack(32, 8);
2295 CCInfo.AnalyzeFormalArguments(Ins, CC_X86);
2297 unsigned LastVal = ~0U;
2299 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2300 CCValAssign &VA = ArgLocs[i];
2301 // TODO: If an arg is passed in two places (e.g. reg and stack), skip later
2303 assert(VA.getValNo() != LastVal &&
2304 "Don't support value assigned to multiple locs yet");
2306 LastVal = VA.getValNo();
2308 if (VA.isRegLoc()) {
2309 EVT RegVT = VA.getLocVT();
2310 const TargetRegisterClass *RC;
2311 if (RegVT == MVT::i32)
2312 RC = &X86::GR32RegClass;
2313 else if (Is64Bit && RegVT == MVT::i64)
2314 RC = &X86::GR64RegClass;
2315 else if (RegVT == MVT::f32)
2316 RC = &X86::FR32RegClass;
2317 else if (RegVT == MVT::f64)
2318 RC = &X86::FR64RegClass;
2319 else if (RegVT.is512BitVector())
2320 RC = &X86::VR512RegClass;
2321 else if (RegVT.is256BitVector())
2322 RC = &X86::VR256RegClass;
2323 else if (RegVT.is128BitVector())
2324 RC = &X86::VR128RegClass;
2325 else if (RegVT == MVT::x86mmx)
2326 RC = &X86::VR64RegClass;
2327 else if (RegVT == MVT::i1)
2328 RC = &X86::VK1RegClass;
2329 else if (RegVT == MVT::v8i1)
2330 RC = &X86::VK8RegClass;
2331 else if (RegVT == MVT::v16i1)
2332 RC = &X86::VK16RegClass;
2333 else if (RegVT == MVT::v32i1)
2334 RC = &X86::VK32RegClass;
2335 else if (RegVT == MVT::v64i1)
2336 RC = &X86::VK64RegClass;
2338 llvm_unreachable("Unknown argument type!");
2340 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
2341 ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
2343 // If this is an 8 or 16-bit value, it is really passed promoted to 32
2344 // bits. Insert an assert[sz]ext to capture this, then truncate to the
2346 if (VA.getLocInfo() == CCValAssign::SExt)
2347 ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue,
2348 DAG.getValueType(VA.getValVT()));
2349 else if (VA.getLocInfo() == CCValAssign::ZExt)
2350 ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue,
2351 DAG.getValueType(VA.getValVT()));
2352 else if (VA.getLocInfo() == CCValAssign::BCvt)
2353 ArgValue = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), ArgValue);
2355 if (VA.isExtInLoc()) {
2356 // Handle MMX values passed in XMM regs.
2357 if (RegVT.isVector())
2358 ArgValue = DAG.getNode(X86ISD::MOVDQ2Q, dl, VA.getValVT(), ArgValue);
2360 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
2363 assert(VA.isMemLoc());
2364 ArgValue = LowerMemArgument(Chain, CallConv, Ins, dl, DAG, VA, MFI, i);
2367 // If value is passed via pointer - do a load.
2368 if (VA.getLocInfo() == CCValAssign::Indirect)
2369 ArgValue = DAG.getLoad(VA.getValVT(), dl, Chain, ArgValue,
2370 MachinePointerInfo(), false, false, false, 0);
2372 InVals.push_back(ArgValue);
2375 if (Subtarget->is64Bit() || Subtarget->isTargetKnownWindowsMSVC()) {
2376 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2377 // The x86-64 ABIs require that for returning structs by value we copy
2378 // the sret argument into %rax/%eax (depending on ABI) for the return.
2379 // Win32 requires us to put the sret argument to %eax as well.
2380 // Save the argument into a virtual register so that we can access it
2381 // from the return points.
2382 if (Ins[i].Flags.isSRet()) {
2383 unsigned Reg = FuncInfo->getSRetReturnReg();
2385 MVT PtrTy = getPointerTy();
2386 Reg = MF.getRegInfo().createVirtualRegister(getRegClassFor(PtrTy));
2387 FuncInfo->setSRetReturnReg(Reg);
2389 SDValue Copy = DAG.getCopyToReg(DAG.getEntryNode(), dl, Reg, InVals[i]);
2390 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Copy, Chain);
2396 unsigned StackSize = CCInfo.getNextStackOffset();
2397 // Align stack specially for tail calls.
2398 if (FuncIsMadeTailCallSafe(CallConv,
2399 MF.getTarget().Options.GuaranteedTailCallOpt))
2400 StackSize = GetAlignedArgumentStackSize(StackSize, DAG);
2402 // If the function takes variable number of arguments, make a frame index for
2403 // the start of the first vararg value... for expansion of llvm.va_start.
2405 if (Is64Bit || (CallConv != CallingConv::X86_FastCall &&
2406 CallConv != CallingConv::X86_ThisCall)) {
2407 FuncInfo->setVarArgsFrameIndex(MFI->CreateFixedObject(1, StackSize,true));
2410 unsigned TotalNumIntRegs = 0, TotalNumXMMRegs = 0;
2412 // FIXME: We should really autogenerate these arrays
2413 static const MCPhysReg GPR64ArgRegsWin64[] = {
2414 X86::RCX, X86::RDX, X86::R8, X86::R9
2416 static const MCPhysReg GPR64ArgRegs64Bit[] = {
2417 X86::RDI, X86::RSI, X86::RDX, X86::RCX, X86::R8, X86::R9
2419 static const MCPhysReg XMMArgRegs64Bit[] = {
2420 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
2421 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
2423 const MCPhysReg *GPR64ArgRegs;
2424 unsigned NumXMMRegs = 0;
2427 // The XMM registers which might contain var arg parameters are shadowed
2428 // in their paired GPR. So we only need to save the GPR to their home
2430 TotalNumIntRegs = 4;
2431 GPR64ArgRegs = GPR64ArgRegsWin64;
2433 TotalNumIntRegs = 6; TotalNumXMMRegs = 8;
2434 GPR64ArgRegs = GPR64ArgRegs64Bit;
2436 NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs64Bit,
2439 unsigned NumIntRegs = CCInfo.getFirstUnallocated(GPR64ArgRegs,
2442 bool NoImplicitFloatOps = Fn->getAttributes().
2443 hasAttribute(AttributeSet::FunctionIndex, Attribute::NoImplicitFloat);
2444 assert(!(NumXMMRegs && !Subtarget->hasSSE1()) &&
2445 "SSE register cannot be used when SSE is disabled!");
2446 assert(!(NumXMMRegs && MF.getTarget().Options.UseSoftFloat &&
2447 NoImplicitFloatOps) &&
2448 "SSE register cannot be used when SSE is disabled!");
2449 if (MF.getTarget().Options.UseSoftFloat || NoImplicitFloatOps ||
2450 !Subtarget->hasSSE1())
2451 // Kernel mode asks for SSE to be disabled, so don't push them
2453 TotalNumXMMRegs = 0;
2456 const TargetFrameLowering &TFI = *MF.getSubtarget().getFrameLowering();
2457 // Get to the caller-allocated home save location. Add 8 to account
2458 // for the return address.
2459 int HomeOffset = TFI.getOffsetOfLocalArea() + 8;
2460 FuncInfo->setRegSaveFrameIndex(
2461 MFI->CreateFixedObject(1, NumIntRegs * 8 + HomeOffset, false));
2462 // Fixup to set vararg frame on shadow area (4 x i64).
2464 FuncInfo->setVarArgsFrameIndex(FuncInfo->getRegSaveFrameIndex());
2466 // For X86-64, if there are vararg parameters that are passed via
2467 // registers, then we must store them to their spots on the stack so
2468 // they may be loaded by deferencing the result of va_next.
2469 FuncInfo->setVarArgsGPOffset(NumIntRegs * 8);
2470 FuncInfo->setVarArgsFPOffset(TotalNumIntRegs * 8 + NumXMMRegs * 16);
2471 FuncInfo->setRegSaveFrameIndex(
2472 MFI->CreateStackObject(TotalNumIntRegs * 8 + TotalNumXMMRegs * 16, 16,
2476 // Store the integer parameter registers.
2477 SmallVector<SDValue, 8> MemOps;
2478 SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(),
2480 unsigned Offset = FuncInfo->getVarArgsGPOffset();
2481 for (; NumIntRegs != TotalNumIntRegs; ++NumIntRegs) {
2482 SDValue FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), RSFIN,
2483 DAG.getIntPtrConstant(Offset));
2484 unsigned VReg = MF.addLiveIn(GPR64ArgRegs[NumIntRegs],
2485 &X86::GR64RegClass);
2486 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);
2488 DAG.getStore(Val.getValue(1), dl, Val, FIN,
2489 MachinePointerInfo::getFixedStack(
2490 FuncInfo->getRegSaveFrameIndex(), Offset),
2492 MemOps.push_back(Store);
2496 if (TotalNumXMMRegs != 0 && NumXMMRegs != TotalNumXMMRegs) {
2497 // Now store the XMM (fp + vector) parameter registers.
2498 SmallVector<SDValue, 12> SaveXMMOps;
2499 SaveXMMOps.push_back(Chain);
2501 unsigned AL = MF.addLiveIn(X86::AL, &X86::GR8RegClass);
2502 SDValue ALVal = DAG.getCopyFromReg(DAG.getEntryNode(), dl, AL, MVT::i8);
2503 SaveXMMOps.push_back(ALVal);
2505 SaveXMMOps.push_back(DAG.getIntPtrConstant(
2506 FuncInfo->getRegSaveFrameIndex()));
2507 SaveXMMOps.push_back(DAG.getIntPtrConstant(
2508 FuncInfo->getVarArgsFPOffset()));
2510 for (; NumXMMRegs != TotalNumXMMRegs; ++NumXMMRegs) {
2511 unsigned VReg = MF.addLiveIn(XMMArgRegs64Bit[NumXMMRegs],
2512 &X86::VR128RegClass);
2513 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::v4f32);
2514 SaveXMMOps.push_back(Val);
2516 MemOps.push_back(DAG.getNode(X86ISD::VASTART_SAVE_XMM_REGS, dl,
2517 MVT::Other, SaveXMMOps));
2520 if (!MemOps.empty())
2521 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOps);
2525 // Some CCs need callee pop.
2526 if (X86::isCalleePop(CallConv, Is64Bit, isVarArg,
2527 MF.getTarget().Options.GuaranteedTailCallOpt)) {
2528 FuncInfo->setBytesToPopOnReturn(StackSize); // Callee pops everything.
2530 FuncInfo->setBytesToPopOnReturn(0); // Callee pops nothing.
2531 // If this is an sret function, the return should pop the hidden pointer.
2532 if (!Is64Bit && !IsTailCallConvention(CallConv) &&
2533 !Subtarget->getTargetTriple().isOSMSVCRT() &&
2534 argsAreStructReturn(Ins) == StackStructReturn)
2535 FuncInfo->setBytesToPopOnReturn(4);
2539 // RegSaveFrameIndex is X86-64 only.
2540 FuncInfo->setRegSaveFrameIndex(0xAAAAAAA);
2541 if (CallConv == CallingConv::X86_FastCall ||
2542 CallConv == CallingConv::X86_ThisCall)
2543 // fastcc functions can't have varargs.
2544 FuncInfo->setVarArgsFrameIndex(0xAAAAAAA);
2547 FuncInfo->setArgumentStackSize(StackSize);
2553 X86TargetLowering::LowerMemOpCallTo(SDValue Chain,
2554 SDValue StackPtr, SDValue Arg,
2555 SDLoc dl, SelectionDAG &DAG,
2556 const CCValAssign &VA,
2557 ISD::ArgFlagsTy Flags) const {
2558 unsigned LocMemOffset = VA.getLocMemOffset();
2559 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
2560 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
2561 if (Flags.isByVal())
2562 return CreateCopyOfByValArgument(Arg, PtrOff, Chain, Flags, DAG, dl);
2564 return DAG.getStore(Chain, dl, Arg, PtrOff,
2565 MachinePointerInfo::getStack(LocMemOffset),
2569 /// EmitTailCallLoadRetAddr - Emit a load of return address if tail call
2570 /// optimization is performed and it is required.
2572 X86TargetLowering::EmitTailCallLoadRetAddr(SelectionDAG &DAG,
2573 SDValue &OutRetAddr, SDValue Chain,
2574 bool IsTailCall, bool Is64Bit,
2575 int FPDiff, SDLoc dl) const {
2576 // Adjust the Return address stack slot.
2577 EVT VT = getPointerTy();
2578 OutRetAddr = getReturnAddressFrameIndex(DAG);
2580 // Load the "old" Return address.
2581 OutRetAddr = DAG.getLoad(VT, dl, Chain, OutRetAddr, MachinePointerInfo(),
2582 false, false, false, 0);
2583 return SDValue(OutRetAddr.getNode(), 1);
2586 /// EmitTailCallStoreRetAddr - Emit a store of the return address if tail call
2587 /// optimization is performed and it is required (FPDiff!=0).
2588 static SDValue EmitTailCallStoreRetAddr(SelectionDAG &DAG, MachineFunction &MF,
2589 SDValue Chain, SDValue RetAddrFrIdx,
2590 EVT PtrVT, unsigned SlotSize,
2591 int FPDiff, SDLoc dl) {
2592 // Store the return address to the appropriate stack slot.
2593 if (!FPDiff) return Chain;
2594 // Calculate the new stack slot for the return address.
2595 int NewReturnAddrFI =
2596 MF.getFrameInfo()->CreateFixedObject(SlotSize, (int64_t)FPDiff - SlotSize,
2598 SDValue NewRetAddrFrIdx = DAG.getFrameIndex(NewReturnAddrFI, PtrVT);
2599 Chain = DAG.getStore(Chain, dl, RetAddrFrIdx, NewRetAddrFrIdx,
2600 MachinePointerInfo::getFixedStack(NewReturnAddrFI),
2606 X86TargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
2607 SmallVectorImpl<SDValue> &InVals) const {
2608 SelectionDAG &DAG = CLI.DAG;
2610 SmallVectorImpl<ISD::OutputArg> &Outs = CLI.Outs;
2611 SmallVectorImpl<SDValue> &OutVals = CLI.OutVals;
2612 SmallVectorImpl<ISD::InputArg> &Ins = CLI.Ins;
2613 SDValue Chain = CLI.Chain;
2614 SDValue Callee = CLI.Callee;
2615 CallingConv::ID CallConv = CLI.CallConv;
2616 bool &isTailCall = CLI.IsTailCall;
2617 bool isVarArg = CLI.IsVarArg;
2619 MachineFunction &MF = DAG.getMachineFunction();
2620 bool Is64Bit = Subtarget->is64Bit();
2621 bool IsWin64 = Subtarget->isCallingConvWin64(CallConv);
2622 StructReturnType SR = callIsStructReturn(Outs);
2623 bool IsSibcall = false;
2625 if (MF.getTarget().Options.DisableTailCalls)
2628 bool IsMustTail = CLI.CS && CLI.CS->isMustTailCall();
2630 // Force this to be a tail call. The verifier rules are enough to ensure
2631 // that we can lower this successfully without moving the return address
2634 } else if (isTailCall) {
2635 // Check if it's really possible to do a tail call.
2636 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv,
2637 isVarArg, SR != NotStructReturn,
2638 MF.getFunction()->hasStructRetAttr(), CLI.RetTy,
2639 Outs, OutVals, Ins, DAG);
2641 // Sibcalls are automatically detected tailcalls which do not require
2643 if (!MF.getTarget().Options.GuaranteedTailCallOpt && isTailCall)
2650 assert(!(isVarArg && IsTailCallConvention(CallConv)) &&
2651 "Var args not supported with calling convention fastcc, ghc or hipe");
2653 // Analyze operands of the call, assigning locations to each operand.
2654 SmallVector<CCValAssign, 16> ArgLocs;
2655 CCState CCInfo(CallConv, isVarArg, MF, ArgLocs, *DAG.getContext());
2657 // Allocate shadow area for Win64
2659 CCInfo.AllocateStack(32, 8);
2661 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2663 // Get a count of how many bytes are to be pushed on the stack.
2664 unsigned NumBytes = CCInfo.getNextStackOffset();
2666 // This is a sibcall. The memory operands are available in caller's
2667 // own caller's stack.
2669 else if (MF.getTarget().Options.GuaranteedTailCallOpt &&
2670 IsTailCallConvention(CallConv))
2671 NumBytes = GetAlignedArgumentStackSize(NumBytes, DAG);
2674 if (isTailCall && !IsSibcall && !IsMustTail) {
2675 // Lower arguments at fp - stackoffset + fpdiff.
2676 X86MachineFunctionInfo *X86Info = MF.getInfo<X86MachineFunctionInfo>();
2677 unsigned NumBytesCallerPushed = X86Info->getBytesToPopOnReturn();
2679 FPDiff = NumBytesCallerPushed - NumBytes;
2681 // Set the delta of movement of the returnaddr stackslot.
2682 // But only set if delta is greater than previous delta.
2683 if (FPDiff < X86Info->getTCReturnAddrDelta())
2684 X86Info->setTCReturnAddrDelta(FPDiff);
2687 unsigned NumBytesToPush = NumBytes;
2688 unsigned NumBytesToPop = NumBytes;
2690 // If we have an inalloca argument, all stack space has already been allocated
2691 // for us and be right at the top of the stack. We don't support multiple
2692 // arguments passed in memory when using inalloca.
2693 if (!Outs.empty() && Outs.back().Flags.isInAlloca()) {
2695 if (!ArgLocs.back().isMemLoc())
2696 report_fatal_error("cannot use inalloca attribute on a register "
2698 if (ArgLocs.back().getLocMemOffset() != 0)
2699 report_fatal_error("any parameter with the inalloca attribute must be "
2700 "the only memory argument");
2704 Chain = DAG.getCALLSEQ_START(
2705 Chain, DAG.getIntPtrConstant(NumBytesToPush, true), dl);
2707 SDValue RetAddrFrIdx;
2708 // Load return address for tail calls.
2709 if (isTailCall && FPDiff)
2710 Chain = EmitTailCallLoadRetAddr(DAG, RetAddrFrIdx, Chain, isTailCall,
2711 Is64Bit, FPDiff, dl);
2713 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
2714 SmallVector<SDValue, 8> MemOpChains;
2717 // Walk the register/memloc assignments, inserting copies/loads. In the case
2718 // of tail call optimization arguments are handle later.
2719 const X86RegisterInfo *RegInfo = static_cast<const X86RegisterInfo *>(
2720 DAG.getSubtarget().getRegisterInfo());
2721 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2722 // Skip inalloca arguments, they have already been written.
2723 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2724 if (Flags.isInAlloca())
2727 CCValAssign &VA = ArgLocs[i];
2728 EVT RegVT = VA.getLocVT();
2729 SDValue Arg = OutVals[i];
2730 bool isByVal = Flags.isByVal();
2732 // Promote the value if needed.
2733 switch (VA.getLocInfo()) {
2734 default: llvm_unreachable("Unknown loc info!");
2735 case CCValAssign::Full: break;
2736 case CCValAssign::SExt:
2737 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, RegVT, Arg);
2739 case CCValAssign::ZExt:
2740 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, RegVT, Arg);
2742 case CCValAssign::AExt:
2743 if (RegVT.is128BitVector()) {
2744 // Special case: passing MMX values in XMM registers.
2745 Arg = DAG.getNode(ISD::BITCAST, dl, MVT::i64, Arg);
2746 Arg = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, Arg);
2747 Arg = getMOVL(DAG, dl, MVT::v2i64, DAG.getUNDEF(MVT::v2i64), Arg);
2749 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, RegVT, Arg);
2751 case CCValAssign::BCvt:
2752 Arg = DAG.getNode(ISD::BITCAST, dl, RegVT, Arg);
2754 case CCValAssign::Indirect: {
2755 // Store the argument.
2756 SDValue SpillSlot = DAG.CreateStackTemporary(VA.getValVT());
2757 int FI = cast<FrameIndexSDNode>(SpillSlot)->getIndex();
2758 Chain = DAG.getStore(Chain, dl, Arg, SpillSlot,
2759 MachinePointerInfo::getFixedStack(FI),
2766 if (VA.isRegLoc()) {
2767 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
2768 if (isVarArg && IsWin64) {
2769 // Win64 ABI requires argument XMM reg to be copied to the corresponding
2770 // shadow reg if callee is a varargs function.
2771 unsigned ShadowReg = 0;
2772 switch (VA.getLocReg()) {
2773 case X86::XMM0: ShadowReg = X86::RCX; break;
2774 case X86::XMM1: ShadowReg = X86::RDX; break;
2775 case X86::XMM2: ShadowReg = X86::R8; break;
2776 case X86::XMM3: ShadowReg = X86::R9; break;
2779 RegsToPass.push_back(std::make_pair(ShadowReg, Arg));
2781 } else if (!IsSibcall && (!isTailCall || isByVal)) {
2782 assert(VA.isMemLoc());
2783 if (!StackPtr.getNode())
2784 StackPtr = DAG.getCopyFromReg(Chain, dl, RegInfo->getStackRegister(),
2786 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg,
2787 dl, DAG, VA, Flags));
2791 if (!MemOpChains.empty())
2792 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains);
2794 if (Subtarget->isPICStyleGOT()) {
2795 // ELF / PIC requires GOT in the EBX register before function calls via PLT
2798 RegsToPass.push_back(std::make_pair(unsigned(X86::EBX),
2799 DAG.getNode(X86ISD::GlobalBaseReg, SDLoc(), getPointerTy())));
2801 // If we are tail calling and generating PIC/GOT style code load the
2802 // address of the callee into ECX. The value in ecx is used as target of
2803 // the tail jump. This is done to circumvent the ebx/callee-saved problem
2804 // for tail calls on PIC/GOT architectures. Normally we would just put the
2805 // address of GOT into ebx and then call target@PLT. But for tail calls
2806 // ebx would be restored (since ebx is callee saved) before jumping to the
2809 // Note: The actual moving to ECX is done further down.
2810 GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee);
2811 if (G && !G->getGlobal()->hasHiddenVisibility() &&
2812 !G->getGlobal()->hasProtectedVisibility())
2813 Callee = LowerGlobalAddress(Callee, DAG);
2814 else if (isa<ExternalSymbolSDNode>(Callee))
2815 Callee = LowerExternalSymbol(Callee, DAG);
2819 if (Is64Bit && isVarArg && !IsWin64) {
2820 // From AMD64 ABI document:
2821 // For calls that may call functions that use varargs or stdargs
2822 // (prototype-less calls or calls to functions containing ellipsis (...) in
2823 // the declaration) %al is used as hidden argument to specify the number
2824 // of SSE registers used. The contents of %al do not need to match exactly
2825 // the number of registers, but must be an ubound on the number of SSE
2826 // registers used and is in the range 0 - 8 inclusive.
2828 // Count the number of XMM registers allocated.
2829 static const MCPhysReg XMMArgRegs[] = {
2830 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
2831 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
2833 unsigned NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs, 8);
2834 assert((Subtarget->hasSSE1() || !NumXMMRegs)
2835 && "SSE registers cannot be used when SSE is disabled");
2837 RegsToPass.push_back(std::make_pair(unsigned(X86::AL),
2838 DAG.getConstant(NumXMMRegs, MVT::i8)));
2841 // For tail calls lower the arguments to the 'real' stack slots. Sibcalls
2842 // don't need this because the eligibility check rejects calls that require
2843 // shuffling arguments passed in memory.
2844 if (!IsSibcall && isTailCall) {
2845 // Force all the incoming stack arguments to be loaded from the stack
2846 // before any new outgoing arguments are stored to the stack, because the
2847 // outgoing stack slots may alias the incoming argument stack slots, and
2848 // the alias isn't otherwise explicit. This is slightly more conservative
2849 // than necessary, because it means that each store effectively depends
2850 // on every argument instead of just those arguments it would clobber.
2851 SDValue ArgChain = DAG.getStackArgumentTokenFactor(Chain);
2853 SmallVector<SDValue, 8> MemOpChains2;
2856 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2857 CCValAssign &VA = ArgLocs[i];
2860 assert(VA.isMemLoc());
2861 SDValue Arg = OutVals[i];
2862 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2863 // Skip inalloca arguments. They don't require any work.
2864 if (Flags.isInAlloca())
2866 // Create frame index.
2867 int32_t Offset = VA.getLocMemOffset()+FPDiff;
2868 uint32_t OpSize = (VA.getLocVT().getSizeInBits()+7)/8;
2869 FI = MF.getFrameInfo()->CreateFixedObject(OpSize, Offset, true);
2870 FIN = DAG.getFrameIndex(FI, getPointerTy());
2872 if (Flags.isByVal()) {
2873 // Copy relative to framepointer.
2874 SDValue Source = DAG.getIntPtrConstant(VA.getLocMemOffset());
2875 if (!StackPtr.getNode())
2876 StackPtr = DAG.getCopyFromReg(Chain, dl,
2877 RegInfo->getStackRegister(),
2879 Source = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, Source);
2881 MemOpChains2.push_back(CreateCopyOfByValArgument(Source, FIN,
2885 // Store relative to framepointer.
2886 MemOpChains2.push_back(
2887 DAG.getStore(ArgChain, dl, Arg, FIN,
2888 MachinePointerInfo::getFixedStack(FI),
2893 if (!MemOpChains2.empty())
2894 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains2);
2896 // Store the return address to the appropriate stack slot.
2897 Chain = EmitTailCallStoreRetAddr(DAG, MF, Chain, RetAddrFrIdx,
2898 getPointerTy(), RegInfo->getSlotSize(),
2902 // Build a sequence of copy-to-reg nodes chained together with token chain
2903 // and flag operands which copy the outgoing args into registers.
2905 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2906 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
2907 RegsToPass[i].second, InFlag);
2908 InFlag = Chain.getValue(1);
2911 if (DAG.getTarget().getCodeModel() == CodeModel::Large) {
2912 assert(Is64Bit && "Large code model is only legal in 64-bit mode.");
2913 // In the 64-bit large code model, we have to make all calls
2914 // through a register, since the call instruction's 32-bit
2915 // pc-relative offset may not be large enough to hold the whole
2917 } else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2918 // If the callee is a GlobalAddress node (quite common, every direct call
2919 // is) turn it into a TargetGlobalAddress node so that legalize doesn't hack
2922 // We should use extra load for direct calls to dllimported functions in
2924 const GlobalValue *GV = G->getGlobal();
2925 if (!GV->hasDLLImportStorageClass()) {
2926 unsigned char OpFlags = 0;
2927 bool ExtraLoad = false;
2928 unsigned WrapperKind = ISD::DELETED_NODE;
2930 // On ELF targets, in both X86-64 and X86-32 mode, direct calls to
2931 // external symbols most go through the PLT in PIC mode. If the symbol
2932 // has hidden or protected visibility, or if it is static or local, then
2933 // we don't need to use the PLT - we can directly call it.
2934 if (Subtarget->isTargetELF() &&
2935 DAG.getTarget().getRelocationModel() == Reloc::PIC_ &&
2936 GV->hasDefaultVisibility() && !GV->hasLocalLinkage()) {
2937 OpFlags = X86II::MO_PLT;
2938 } else if (Subtarget->isPICStyleStubAny() &&
2939 (GV->isDeclaration() || GV->isWeakForLinker()) &&
2940 (!Subtarget->getTargetTriple().isMacOSX() ||
2941 Subtarget->getTargetTriple().isMacOSXVersionLT(10, 5))) {
2942 // PC-relative references to external symbols should go through $stub,
2943 // unless we're building with the leopard linker or later, which
2944 // automatically synthesizes these stubs.
2945 OpFlags = X86II::MO_DARWIN_STUB;
2946 } else if (Subtarget->isPICStyleRIPRel() &&
2947 isa<Function>(GV) &&
2948 cast<Function>(GV)->getAttributes().
2949 hasAttribute(AttributeSet::FunctionIndex,
2950 Attribute::NonLazyBind)) {
2951 // If the function is marked as non-lazy, generate an indirect call
2952 // which loads from the GOT directly. This avoids runtime overhead
2953 // at the cost of eager binding (and one extra byte of encoding).
2954 OpFlags = X86II::MO_GOTPCREL;
2955 WrapperKind = X86ISD::WrapperRIP;
2959 Callee = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(),
2960 G->getOffset(), OpFlags);
2962 // Add a wrapper if needed.
2963 if (WrapperKind != ISD::DELETED_NODE)
2964 Callee = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Callee);
2965 // Add extra indirection if needed.
2967 Callee = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(), Callee,
2968 MachinePointerInfo::getGOT(),
2969 false, false, false, 0);
2971 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
2972 unsigned char OpFlags = 0;
2974 // On ELF targets, in either X86-64 or X86-32 mode, direct calls to
2975 // external symbols should go through the PLT.
2976 if (Subtarget->isTargetELF() &&
2977 DAG.getTarget().getRelocationModel() == Reloc::PIC_) {
2978 OpFlags = X86II::MO_PLT;
2979 } else if (Subtarget->isPICStyleStubAny() &&
2980 (!Subtarget->getTargetTriple().isMacOSX() ||
2981 Subtarget->getTargetTriple().isMacOSXVersionLT(10, 5))) {
2982 // PC-relative references to external symbols should go through $stub,
2983 // unless we're building with the leopard linker or later, which
2984 // automatically synthesizes these stubs.
2985 OpFlags = X86II::MO_DARWIN_STUB;
2988 Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy(),
2992 // Returns a chain & a flag for retval copy to use.
2993 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
2994 SmallVector<SDValue, 8> Ops;
2996 if (!IsSibcall && isTailCall) {
2997 Chain = DAG.getCALLSEQ_END(Chain,
2998 DAG.getIntPtrConstant(NumBytesToPop, true),
2999 DAG.getIntPtrConstant(0, true), InFlag, dl);
3000 InFlag = Chain.getValue(1);
3003 Ops.push_back(Chain);
3004 Ops.push_back(Callee);
3007 Ops.push_back(DAG.getConstant(FPDiff, MVT::i32));
3009 // Add argument registers to the end of the list so that they are known live
3011 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
3012 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
3013 RegsToPass[i].second.getValueType()));
3015 // Add a register mask operand representing the call-preserved registers.
3016 const TargetRegisterInfo *TRI = DAG.getSubtarget().getRegisterInfo();
3017 const uint32_t *Mask = TRI->getCallPreservedMask(CallConv);
3018 assert(Mask && "Missing call preserved mask for calling convention");
3019 Ops.push_back(DAG.getRegisterMask(Mask));
3021 if (InFlag.getNode())
3022 Ops.push_back(InFlag);
3026 //// If this is the first return lowered for this function, add the regs
3027 //// to the liveout set for the function.
3028 // This isn't right, although it's probably harmless on x86; liveouts
3029 // should be computed from returns not tail calls. Consider a void
3030 // function making a tail call to a function returning int.
3031 return DAG.getNode(X86ISD::TC_RETURN, dl, NodeTys, Ops);
3034 Chain = DAG.getNode(X86ISD::CALL, dl, NodeTys, Ops);
3035 InFlag = Chain.getValue(1);
3037 // Create the CALLSEQ_END node.
3038 unsigned NumBytesForCalleeToPop;
3039 if (X86::isCalleePop(CallConv, Is64Bit, isVarArg,
3040 DAG.getTarget().Options.GuaranteedTailCallOpt))
3041 NumBytesForCalleeToPop = NumBytes; // Callee pops everything
3042 else if (!Is64Bit && !IsTailCallConvention(CallConv) &&
3043 !Subtarget->getTargetTriple().isOSMSVCRT() &&
3044 SR == StackStructReturn)
3045 // If this is a call to a struct-return function, the callee
3046 // pops the hidden struct pointer, so we have to push it back.
3047 // This is common for Darwin/X86, Linux & Mingw32 targets.
3048 // For MSVC Win32 targets, the caller pops the hidden struct pointer.
3049 NumBytesForCalleeToPop = 4;
3051 NumBytesForCalleeToPop = 0; // Callee pops nothing.
3053 // Returns a flag for retval copy to use.
3055 Chain = DAG.getCALLSEQ_END(Chain,
3056 DAG.getIntPtrConstant(NumBytesToPop, true),
3057 DAG.getIntPtrConstant(NumBytesForCalleeToPop,
3060 InFlag = Chain.getValue(1);
3063 // Handle result values, copying them out of physregs into vregs that we
3065 return LowerCallResult(Chain, InFlag, CallConv, isVarArg,
3066 Ins, dl, DAG, InVals);
3069 //===----------------------------------------------------------------------===//
3070 // Fast Calling Convention (tail call) implementation
3071 //===----------------------------------------------------------------------===//
3073 // Like std call, callee cleans arguments, convention except that ECX is
3074 // reserved for storing the tail called function address. Only 2 registers are
3075 // free for argument passing (inreg). Tail call optimization is performed
3077 // * tailcallopt is enabled
3078 // * caller/callee are fastcc
3079 // On X86_64 architecture with GOT-style position independent code only local
3080 // (within module) calls are supported at the moment.
3081 // To keep the stack aligned according to platform abi the function
3082 // GetAlignedArgumentStackSize ensures that argument delta is always multiples
3083 // of stack alignment. (Dynamic linkers need this - darwin's dyld for example)
3084 // If a tail called function callee has more arguments than the caller the
3085 // caller needs to make sure that there is room to move the RETADDR to. This is
3086 // achieved by reserving an area the size of the argument delta right after the
3087 // original RETADDR, but before the saved framepointer or the spilled registers
3088 // e.g. caller(arg1, arg2) calls callee(arg1, arg2,arg3,arg4)
3100 /// GetAlignedArgumentStackSize - Make the stack size align e.g 16n + 12 aligned
3101 /// for a 16 byte align requirement.
3103 X86TargetLowering::GetAlignedArgumentStackSize(unsigned StackSize,
3104 SelectionDAG& DAG) const {
3105 MachineFunction &MF = DAG.getMachineFunction();
3106 const TargetMachine &TM = MF.getTarget();
3107 const X86RegisterInfo *RegInfo = static_cast<const X86RegisterInfo *>(
3108 TM.getSubtargetImpl()->getRegisterInfo());
3109 const TargetFrameLowering &TFI = *TM.getSubtargetImpl()->getFrameLowering();
3110 unsigned StackAlignment = TFI.getStackAlignment();
3111 uint64_t AlignMask = StackAlignment - 1;
3112 int64_t Offset = StackSize;
3113 unsigned SlotSize = RegInfo->getSlotSize();
3114 if ( (Offset & AlignMask) <= (StackAlignment - SlotSize) ) {
3115 // Number smaller than 12 so just add the difference.
3116 Offset += ((StackAlignment - SlotSize) - (Offset & AlignMask));
3118 // Mask out lower bits, add stackalignment once plus the 12 bytes.
3119 Offset = ((~AlignMask) & Offset) + StackAlignment +
3120 (StackAlignment-SlotSize);
3125 /// MatchingStackOffset - Return true if the given stack call argument is
3126 /// already available in the same position (relatively) of the caller's
3127 /// incoming argument stack.
3129 bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags,
3130 MachineFrameInfo *MFI, const MachineRegisterInfo *MRI,
3131 const X86InstrInfo *TII) {
3132 unsigned Bytes = Arg.getValueType().getSizeInBits() / 8;
3134 if (Arg.getOpcode() == ISD::CopyFromReg) {
3135 unsigned VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg();
3136 if (!TargetRegisterInfo::isVirtualRegister(VR))
3138 MachineInstr *Def = MRI->getVRegDef(VR);
3141 if (!Flags.isByVal()) {
3142 if (!TII->isLoadFromStackSlot(Def, FI))
3145 unsigned Opcode = Def->getOpcode();
3146 if ((Opcode == X86::LEA32r || Opcode == X86::LEA64r) &&
3147 Def->getOperand(1).isFI()) {
3148 FI = Def->getOperand(1).getIndex();
3149 Bytes = Flags.getByValSize();
3153 } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) {
3154 if (Flags.isByVal())
3155 // ByVal argument is passed in as a pointer but it's now being
3156 // dereferenced. e.g.
3157 // define @foo(%struct.X* %A) {
3158 // tail call @bar(%struct.X* byval %A)
3161 SDValue Ptr = Ld->getBasePtr();
3162 FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr);
3165 FI = FINode->getIndex();
3166 } else if (Arg.getOpcode() == ISD::FrameIndex && Flags.isByVal()) {
3167 FrameIndexSDNode *FINode = cast<FrameIndexSDNode>(Arg);
3168 FI = FINode->getIndex();
3169 Bytes = Flags.getByValSize();
3173 assert(FI != INT_MAX);
3174 if (!MFI->isFixedObjectIndex(FI))
3176 return Offset == MFI->getObjectOffset(FI) && Bytes == MFI->getObjectSize(FI);
3179 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
3180 /// for tail call optimization. Targets which want to do tail call
3181 /// optimization should implement this function.
3183 X86TargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
3184 CallingConv::ID CalleeCC,
3186 bool isCalleeStructRet,
3187 bool isCallerStructRet,
3189 const SmallVectorImpl<ISD::OutputArg> &Outs,
3190 const SmallVectorImpl<SDValue> &OutVals,
3191 const SmallVectorImpl<ISD::InputArg> &Ins,
3192 SelectionDAG &DAG) const {
3193 if (!IsTailCallConvention(CalleeCC) && !IsCCallConvention(CalleeCC))
3196 // If -tailcallopt is specified, make fastcc functions tail-callable.
3197 const MachineFunction &MF = DAG.getMachineFunction();
3198 const Function *CallerF = MF.getFunction();
3200 // If the function return type is x86_fp80 and the callee return type is not,
3201 // then the FP_EXTEND of the call result is not a nop. It's not safe to
3202 // perform a tailcall optimization here.
3203 if (CallerF->getReturnType()->isX86_FP80Ty() && !RetTy->isX86_FP80Ty())
3206 CallingConv::ID CallerCC = CallerF->getCallingConv();
3207 bool CCMatch = CallerCC == CalleeCC;
3208 bool IsCalleeWin64 = Subtarget->isCallingConvWin64(CalleeCC);
3209 bool IsCallerWin64 = Subtarget->isCallingConvWin64(CallerCC);
3211 if (DAG.getTarget().Options.GuaranteedTailCallOpt) {
3212 if (IsTailCallConvention(CalleeCC) && CCMatch)
3217 // Look for obvious safe cases to perform tail call optimization that do not
3218 // require ABI changes. This is what gcc calls sibcall.
3220 // Can't do sibcall if stack needs to be dynamically re-aligned. PEI needs to
3221 // emit a special epilogue.
3222 const X86RegisterInfo *RegInfo = static_cast<const X86RegisterInfo *>(
3223 DAG.getSubtarget().getRegisterInfo());
3224 if (RegInfo->needsStackRealignment(MF))
3227 // Also avoid sibcall optimization if either caller or callee uses struct
3228 // return semantics.
3229 if (isCalleeStructRet || isCallerStructRet)
3232 // An stdcall/thiscall caller is expected to clean up its arguments; the
3233 // callee isn't going to do that.
3234 // FIXME: this is more restrictive than needed. We could produce a tailcall
3235 // when the stack adjustment matches. For example, with a thiscall that takes
3236 // only one argument.
3237 if (!CCMatch && (CallerCC == CallingConv::X86_StdCall ||
3238 CallerCC == CallingConv::X86_ThisCall))
3241 // Do not sibcall optimize vararg calls unless all arguments are passed via
3243 if (isVarArg && !Outs.empty()) {
3245 // Optimizing for varargs on Win64 is unlikely to be safe without
3246 // additional testing.
3247 if (IsCalleeWin64 || IsCallerWin64)
3250 SmallVector<CCValAssign, 16> ArgLocs;
3251 CCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(), ArgLocs,
3254 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
3255 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i)
3256 if (!ArgLocs[i].isRegLoc())
3260 // If the call result is in ST0 / ST1, it needs to be popped off the x87
3261 // stack. Therefore, if it's not used by the call it is not safe to optimize
3262 // this into a sibcall.
3263 bool Unused = false;
3264 for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
3271 SmallVector<CCValAssign, 16> RVLocs;
3272 CCState CCInfo(CalleeCC, false, DAG.getMachineFunction(), RVLocs,
3274 CCInfo.AnalyzeCallResult(Ins, RetCC_X86);
3275 for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) {
3276 CCValAssign &VA = RVLocs[i];
3277 if (VA.getLocReg() == X86::FP0 || VA.getLocReg() == X86::FP1)
3282 // If the calling conventions do not match, then we'd better make sure the
3283 // results are returned in the same way as what the caller expects.
3285 SmallVector<CCValAssign, 16> RVLocs1;
3286 CCState CCInfo1(CalleeCC, false, DAG.getMachineFunction(), RVLocs1,
3288 CCInfo1.AnalyzeCallResult(Ins, RetCC_X86);
3290 SmallVector<CCValAssign, 16> RVLocs2;
3291 CCState CCInfo2(CallerCC, false, DAG.getMachineFunction(), RVLocs2,
3293 CCInfo2.AnalyzeCallResult(Ins, RetCC_X86);
3295 if (RVLocs1.size() != RVLocs2.size())
3297 for (unsigned i = 0, e = RVLocs1.size(); i != e; ++i) {
3298 if (RVLocs1[i].isRegLoc() != RVLocs2[i].isRegLoc())
3300 if (RVLocs1[i].getLocInfo() != RVLocs2[i].getLocInfo())
3302 if (RVLocs1[i].isRegLoc()) {
3303 if (RVLocs1[i].getLocReg() != RVLocs2[i].getLocReg())
3306 if (RVLocs1[i].getLocMemOffset() != RVLocs2[i].getLocMemOffset())
3312 // If the callee takes no arguments then go on to check the results of the
3314 if (!Outs.empty()) {
3315 // Check if stack adjustment is needed. For now, do not do this if any
3316 // argument is passed on the stack.
3317 SmallVector<CCValAssign, 16> ArgLocs;
3318 CCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(), ArgLocs,
3321 // Allocate shadow area for Win64
3323 CCInfo.AllocateStack(32, 8);
3325 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
3326 if (CCInfo.getNextStackOffset()) {
3327 MachineFunction &MF = DAG.getMachineFunction();
3328 if (MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn())
3331 // Check if the arguments are already laid out in the right way as
3332 // the caller's fixed stack objects.
3333 MachineFrameInfo *MFI = MF.getFrameInfo();
3334 const MachineRegisterInfo *MRI = &MF.getRegInfo();
3335 const X86InstrInfo *TII =
3336 static_cast<const X86InstrInfo *>(DAG.getSubtarget().getInstrInfo());
3337 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
3338 CCValAssign &VA = ArgLocs[i];
3339 SDValue Arg = OutVals[i];
3340 ISD::ArgFlagsTy Flags = Outs[i].Flags;
3341 if (VA.getLocInfo() == CCValAssign::Indirect)
3343 if (!VA.isRegLoc()) {
3344 if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags,
3351 // If the tailcall address may be in a register, then make sure it's
3352 // possible to register allocate for it. In 32-bit, the call address can
3353 // only target EAX, EDX, or ECX since the tail call must be scheduled after
3354 // callee-saved registers are restored. These happen to be the same
3355 // registers used to pass 'inreg' arguments so watch out for those.
3356 if (!Subtarget->is64Bit() &&
3357 ((!isa<GlobalAddressSDNode>(Callee) &&
3358 !isa<ExternalSymbolSDNode>(Callee)) ||
3359 DAG.getTarget().getRelocationModel() == Reloc::PIC_)) {
3360 unsigned NumInRegs = 0;
3361 // In PIC we need an extra register to formulate the address computation
3363 unsigned MaxInRegs =
3364 (DAG.getTarget().getRelocationModel() == Reloc::PIC_) ? 2 : 3;
3366 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
3367 CCValAssign &VA = ArgLocs[i];
3370 unsigned Reg = VA.getLocReg();
3373 case X86::EAX: case X86::EDX: case X86::ECX:
3374 if (++NumInRegs == MaxInRegs)
3386 X86TargetLowering::createFastISel(FunctionLoweringInfo &funcInfo,
3387 const TargetLibraryInfo *libInfo) const {
3388 return X86::createFastISel(funcInfo, libInfo);
3391 //===----------------------------------------------------------------------===//
3392 // Other Lowering Hooks
3393 //===----------------------------------------------------------------------===//
3395 static bool MayFoldLoad(SDValue Op) {
3396 return Op.hasOneUse() && ISD::isNormalLoad(Op.getNode());
3399 static bool MayFoldIntoStore(SDValue Op) {
3400 return Op.hasOneUse() && ISD::isNormalStore(*Op.getNode()->use_begin());
3403 static bool isTargetShuffle(unsigned Opcode) {
3405 default: return false;
3406 case X86ISD::PSHUFB:
3407 case X86ISD::PSHUFD:
3408 case X86ISD::PSHUFHW:
3409 case X86ISD::PSHUFLW:
3411 case X86ISD::PALIGNR:
3412 case X86ISD::MOVLHPS:
3413 case X86ISD::MOVLHPD:
3414 case X86ISD::MOVHLPS:
3415 case X86ISD::MOVLPS:
3416 case X86ISD::MOVLPD:
3417 case X86ISD::MOVSHDUP:
3418 case X86ISD::MOVSLDUP:
3419 case X86ISD::MOVDDUP:
3422 case X86ISD::UNPCKL:
3423 case X86ISD::UNPCKH:
3424 case X86ISD::VPERMILP:
3425 case X86ISD::VPERM2X128:
3426 case X86ISD::VPERMI:
3431 static SDValue getTargetShuffleNode(unsigned Opc, SDLoc dl, EVT VT,
3432 SDValue V1, SelectionDAG &DAG) {
3434 default: llvm_unreachable("Unknown x86 shuffle node");
3435 case X86ISD::MOVSHDUP:
3436 case X86ISD::MOVSLDUP:
3437 case X86ISD::MOVDDUP:
3438 return DAG.getNode(Opc, dl, VT, V1);
3442 static SDValue getTargetShuffleNode(unsigned Opc, SDLoc dl, EVT VT,
3443 SDValue V1, unsigned TargetMask,
3444 SelectionDAG &DAG) {
3446 default: llvm_unreachable("Unknown x86 shuffle node");
3447 case X86ISD::PSHUFD:
3448 case X86ISD::PSHUFHW:
3449 case X86ISD::PSHUFLW:
3450 case X86ISD::VPERMILP:
3451 case X86ISD::VPERMI:
3452 return DAG.getNode(Opc, dl, VT, V1, DAG.getConstant(TargetMask, MVT::i8));
3456 static SDValue getTargetShuffleNode(unsigned Opc, SDLoc dl, EVT VT,
3457 SDValue V1, SDValue V2, unsigned TargetMask,
3458 SelectionDAG &DAG) {
3460 default: llvm_unreachable("Unknown x86 shuffle node");
3461 case X86ISD::PALIGNR:
3462 case X86ISD::VALIGN:
3464 case X86ISD::VPERM2X128:
3465 return DAG.getNode(Opc, dl, VT, V1, V2,
3466 DAG.getConstant(TargetMask, MVT::i8));
3470 static SDValue getTargetShuffleNode(unsigned Opc, SDLoc dl, EVT VT,
3471 SDValue V1, SDValue V2, SelectionDAG &DAG) {
3473 default: llvm_unreachable("Unknown x86 shuffle node");
3474 case X86ISD::MOVLHPS:
3475 case X86ISD::MOVLHPD:
3476 case X86ISD::MOVHLPS:
3477 case X86ISD::MOVLPS:
3478 case X86ISD::MOVLPD:
3481 case X86ISD::UNPCKL:
3482 case X86ISD::UNPCKH:
3483 return DAG.getNode(Opc, dl, VT, V1, V2);
3487 SDValue X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) const {
3488 MachineFunction &MF = DAG.getMachineFunction();
3489 const X86RegisterInfo *RegInfo = static_cast<const X86RegisterInfo *>(
3490 DAG.getSubtarget().getRegisterInfo());
3491 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
3492 int ReturnAddrIndex = FuncInfo->getRAIndex();
3494 if (ReturnAddrIndex == 0) {
3495 // Set up a frame object for the return address.
3496 unsigned SlotSize = RegInfo->getSlotSize();
3497 ReturnAddrIndex = MF.getFrameInfo()->CreateFixedObject(SlotSize,
3500 FuncInfo->setRAIndex(ReturnAddrIndex);
3503 return DAG.getFrameIndex(ReturnAddrIndex, getPointerTy());
3506 bool X86::isOffsetSuitableForCodeModel(int64_t Offset, CodeModel::Model M,
3507 bool hasSymbolicDisplacement) {
3508 // Offset should fit into 32 bit immediate field.
3509 if (!isInt<32>(Offset))
3512 // If we don't have a symbolic displacement - we don't have any extra
3514 if (!hasSymbolicDisplacement)
3517 // FIXME: Some tweaks might be needed for medium code model.
3518 if (M != CodeModel::Small && M != CodeModel::Kernel)
3521 // For small code model we assume that latest object is 16MB before end of 31
3522 // bits boundary. We may also accept pretty large negative constants knowing
3523 // that all objects are in the positive half of address space.
3524 if (M == CodeModel::Small && Offset < 16*1024*1024)
3527 // For kernel code model we know that all object resist in the negative half
3528 // of 32bits address space. We may not accept negative offsets, since they may
3529 // be just off and we may accept pretty large positive ones.
3530 if (M == CodeModel::Kernel && Offset > 0)
3536 /// isCalleePop - Determines whether the callee is required to pop its
3537 /// own arguments. Callee pop is necessary to support tail calls.
3538 bool X86::isCalleePop(CallingConv::ID CallingConv,
3539 bool is64Bit, bool IsVarArg, bool TailCallOpt) {
3543 switch (CallingConv) {
3546 case CallingConv::X86_StdCall:
3548 case CallingConv::X86_FastCall:
3550 case CallingConv::X86_ThisCall:
3552 case CallingConv::Fast:
3554 case CallingConv::GHC:
3556 case CallingConv::HiPE:
3561 /// \brief Return true if the condition is an unsigned comparison operation.
3562 static bool isX86CCUnsigned(unsigned X86CC) {
3564 default: llvm_unreachable("Invalid integer condition!");
3565 case X86::COND_E: return true;
3566 case X86::COND_G: return false;
3567 case X86::COND_GE: return false;
3568 case X86::COND_L: return false;
3569 case X86::COND_LE: return false;
3570 case X86::COND_NE: return true;
3571 case X86::COND_B: return true;
3572 case X86::COND_A: return true;
3573 case X86::COND_BE: return true;
3574 case X86::COND_AE: return true;
3576 llvm_unreachable("covered switch fell through?!");
3579 /// TranslateX86CC - do a one to one translation of a ISD::CondCode to the X86
3580 /// specific condition code, returning the condition code and the LHS/RHS of the
3581 /// comparison to make.
3582 static unsigned TranslateX86CC(ISD::CondCode SetCCOpcode, bool isFP,
3583 SDValue &LHS, SDValue &RHS, SelectionDAG &DAG) {
3585 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS)) {
3586 if (SetCCOpcode == ISD::SETGT && RHSC->isAllOnesValue()) {
3587 // X > -1 -> X == 0, jump !sign.
3588 RHS = DAG.getConstant(0, RHS.getValueType());
3589 return X86::COND_NS;
3591 if (SetCCOpcode == ISD::SETLT && RHSC->isNullValue()) {
3592 // X < 0 -> X == 0, jump on sign.
3595 if (SetCCOpcode == ISD::SETLT && RHSC->getZExtValue() == 1) {
3597 RHS = DAG.getConstant(0, RHS.getValueType());
3598 return X86::COND_LE;
3602 switch (SetCCOpcode) {
3603 default: llvm_unreachable("Invalid integer condition!");
3604 case ISD::SETEQ: return X86::COND_E;
3605 case ISD::SETGT: return X86::COND_G;
3606 case ISD::SETGE: return X86::COND_GE;
3607 case ISD::SETLT: return X86::COND_L;
3608 case ISD::SETLE: return X86::COND_LE;
3609 case ISD::SETNE: return X86::COND_NE;
3610 case ISD::SETULT: return X86::COND_B;
3611 case ISD::SETUGT: return X86::COND_A;
3612 case ISD::SETULE: return X86::COND_BE;
3613 case ISD::SETUGE: return X86::COND_AE;
3617 // First determine if it is required or is profitable to flip the operands.
3619 // If LHS is a foldable load, but RHS is not, flip the condition.
3620 if (ISD::isNON_EXTLoad(LHS.getNode()) &&
3621 !ISD::isNON_EXTLoad(RHS.getNode())) {
3622 SetCCOpcode = getSetCCSwappedOperands(SetCCOpcode);
3623 std::swap(LHS, RHS);
3626 switch (SetCCOpcode) {
3632 std::swap(LHS, RHS);
3636 // On a floating point condition, the flags are set as follows:
3638 // 0 | 0 | 0 | X > Y
3639 // 0 | 0 | 1 | X < Y
3640 // 1 | 0 | 0 | X == Y
3641 // 1 | 1 | 1 | unordered
3642 switch (SetCCOpcode) {
3643 default: llvm_unreachable("Condcode should be pre-legalized away");
3645 case ISD::SETEQ: return X86::COND_E;
3646 case ISD::SETOLT: // flipped
3648 case ISD::SETGT: return X86::COND_A;
3649 case ISD::SETOLE: // flipped
3651 case ISD::SETGE: return X86::COND_AE;
3652 case ISD::SETUGT: // flipped
3654 case ISD::SETLT: return X86::COND_B;
3655 case ISD::SETUGE: // flipped
3657 case ISD::SETLE: return X86::COND_BE;
3659 case ISD::SETNE: return X86::COND_NE;
3660 case ISD::SETUO: return X86::COND_P;
3661 case ISD::SETO: return X86::COND_NP;
3663 case ISD::SETUNE: return X86::COND_INVALID;
3667 /// hasFPCMov - is there a floating point cmov for the specific X86 condition
3668 /// code. Current x86 isa includes the following FP cmov instructions:
3669 /// fcmovb, fcomvbe, fcomve, fcmovu, fcmovae, fcmova, fcmovne, fcmovnu.
3670 static bool hasFPCMov(unsigned X86CC) {
3686 /// isFPImmLegal - Returns true if the target can instruction select the
3687 /// specified FP immediate natively. If false, the legalizer will
3688 /// materialize the FP immediate as a load from a constant pool.
3689 bool X86TargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
3690 for (unsigned i = 0, e = LegalFPImmediates.size(); i != e; ++i) {
3691 if (Imm.bitwiseIsEqual(LegalFPImmediates[i]))
3697 /// \brief Returns true if it is beneficial to convert a load of a constant
3698 /// to just the constant itself.
3699 bool X86TargetLowering::shouldConvertConstantLoadToIntImm(const APInt &Imm,
3701 assert(Ty->isIntegerTy());
3703 unsigned BitSize = Ty->getPrimitiveSizeInBits();
3704 if (BitSize == 0 || BitSize > 64)
3709 /// isUndefOrInRange - Return true if Val is undef or if its value falls within
3710 /// the specified range (L, H].
3711 static bool isUndefOrInRange(int Val, int Low, int Hi) {
3712 return (Val < 0) || (Val >= Low && Val < Hi);
3715 /// isUndefOrEqual - Val is either less than zero (undef) or equal to the
3716 /// specified value.
3717 static bool isUndefOrEqual(int Val, int CmpVal) {
3718 return (Val < 0 || Val == CmpVal);
3721 /// isSequentialOrUndefInRange - Return true if every element in Mask, beginning
3722 /// from position Pos and ending in Pos+Size, falls within the specified
3723 /// sequential range (L, L+Pos]. or is undef.
3724 static bool isSequentialOrUndefInRange(ArrayRef<int> Mask,
3725 unsigned Pos, unsigned Size, int Low) {
3726 for (unsigned i = Pos, e = Pos+Size; i != e; ++i, ++Low)
3727 if (!isUndefOrEqual(Mask[i], Low))
3732 /// isPSHUFDMask - Return true if the node specifies a shuffle of elements that
3733 /// is suitable for input to PSHUFD or PSHUFW. That is, it doesn't reference
3734 /// the second operand.
3735 static bool isPSHUFDMask(ArrayRef<int> Mask, MVT VT) {
3736 if (VT == MVT::v4f32 || VT == MVT::v4i32 )
3737 return (Mask[0] < 4 && Mask[1] < 4 && Mask[2] < 4 && Mask[3] < 4);
3738 if (VT == MVT::v2f64 || VT == MVT::v2i64)
3739 return (Mask[0] < 2 && Mask[1] < 2);
3743 /// isPSHUFHWMask - Return true if the node specifies a shuffle of elements that
3744 /// is suitable for input to PSHUFHW.
3745 static bool isPSHUFHWMask(ArrayRef<int> Mask, MVT VT, bool HasInt256) {
3746 if (VT != MVT::v8i16 && (!HasInt256 || VT != MVT::v16i16))
3749 // Lower quadword copied in order or undef.
3750 if (!isSequentialOrUndefInRange(Mask, 0, 4, 0))
3753 // Upper quadword shuffled.
3754 for (unsigned i = 4; i != 8; ++i)
3755 if (!isUndefOrInRange(Mask[i], 4, 8))
3758 if (VT == MVT::v16i16) {
3759 // Lower quadword copied in order or undef.
3760 if (!isSequentialOrUndefInRange(Mask, 8, 4, 8))
3763 // Upper quadword shuffled.
3764 for (unsigned i = 12; i != 16; ++i)
3765 if (!isUndefOrInRange(Mask[i], 12, 16))
3772 /// isPSHUFLWMask - Return true if the node specifies a shuffle of elements that
3773 /// is suitable for input to PSHUFLW.
3774 static bool isPSHUFLWMask(ArrayRef<int> Mask, MVT VT, bool HasInt256) {
3775 if (VT != MVT::v8i16 && (!HasInt256 || VT != MVT::v16i16))
3778 // Upper quadword copied in order.
3779 if (!isSequentialOrUndefInRange(Mask, 4, 4, 4))
3782 // Lower quadword shuffled.
3783 for (unsigned i = 0; i != 4; ++i)
3784 if (!isUndefOrInRange(Mask[i], 0, 4))
3787 if (VT == MVT::v16i16) {
3788 // Upper quadword copied in order.
3789 if (!isSequentialOrUndefInRange(Mask, 12, 4, 12))
3792 // Lower quadword shuffled.
3793 for (unsigned i = 8; i != 12; ++i)
3794 if (!isUndefOrInRange(Mask[i], 8, 12))
3801 /// \brief Return true if the mask specifies a shuffle of elements that is
3802 /// suitable for input to intralane (palignr) or interlane (valign) vector
3804 static bool isAlignrMask(ArrayRef<int> Mask, MVT VT, bool InterLane) {
3805 unsigned NumElts = VT.getVectorNumElements();
3806 unsigned NumLanes = InterLane ? 1: VT.getSizeInBits()/128;
3807 unsigned NumLaneElts = NumElts/NumLanes;
3809 // Do not handle 64-bit element shuffles with palignr.
3810 if (NumLaneElts == 2)
3813 for (unsigned l = 0; l != NumElts; l+=NumLaneElts) {
3815 for (i = 0; i != NumLaneElts; ++i) {
3820 // Lane is all undef, go to next lane
3821 if (i == NumLaneElts)
3824 int Start = Mask[i+l];
3826 // Make sure its in this lane in one of the sources
3827 if (!isUndefOrInRange(Start, l, l+NumLaneElts) &&
3828 !isUndefOrInRange(Start, l+NumElts, l+NumElts+NumLaneElts))
3831 // If not lane 0, then we must match lane 0
3832 if (l != 0 && Mask[i] >= 0 && !isUndefOrEqual(Start, Mask[i]+l))
3835 // Correct second source to be contiguous with first source
3836 if (Start >= (int)NumElts)
3837 Start -= NumElts - NumLaneElts;
3839 // Make sure we're shifting in the right direction.
3840 if (Start <= (int)(i+l))
3845 // Check the rest of the elements to see if they are consecutive.
3846 for (++i; i != NumLaneElts; ++i) {
3847 int Idx = Mask[i+l];
3849 // Make sure its in this lane
3850 if (!isUndefOrInRange(Idx, l, l+NumLaneElts) &&
3851 !isUndefOrInRange(Idx, l+NumElts, l+NumElts+NumLaneElts))
3854 // If not lane 0, then we must match lane 0
3855 if (l != 0 && Mask[i] >= 0 && !isUndefOrEqual(Idx, Mask[i]+l))
3858 if (Idx >= (int)NumElts)
3859 Idx -= NumElts - NumLaneElts;
3861 if (!isUndefOrEqual(Idx, Start+i))
3870 /// \brief Return true if the node specifies a shuffle of elements that is
3871 /// suitable for input to PALIGNR.
3872 static bool isPALIGNRMask(ArrayRef<int> Mask, MVT VT,
3873 const X86Subtarget *Subtarget) {
3874 if ((VT.is128BitVector() && !Subtarget->hasSSSE3()) ||
3875 (VT.is256BitVector() && !Subtarget->hasInt256()))
3876 // FIXME: Add AVX512BW.
3879 return isAlignrMask(Mask, VT, false);
3882 /// \brief Return true if the node specifies a shuffle of elements that is
3883 /// suitable for input to VALIGN.
3884 static bool isVALIGNMask(ArrayRef<int> Mask, MVT VT,
3885 const X86Subtarget *Subtarget) {
3886 // FIXME: Add AVX512VL.
3887 if (!VT.is512BitVector() || !Subtarget->hasAVX512())
3889 return isAlignrMask(Mask, VT, true);
3892 /// CommuteVectorShuffleMask - Change values in a shuffle permute mask assuming
3893 /// the two vector operands have swapped position.
3894 static void CommuteVectorShuffleMask(SmallVectorImpl<int> &Mask,
3895 unsigned NumElems) {
3896 for (unsigned i = 0; i != NumElems; ++i) {
3900 else if (idx < (int)NumElems)
3901 Mask[i] = idx + NumElems;
3903 Mask[i] = idx - NumElems;
3907 /// isSHUFPMask - Return true if the specified VECTOR_SHUFFLE operand
3908 /// specifies a shuffle of elements that is suitable for input to 128/256-bit
3909 /// SHUFPS and SHUFPD. If Commuted is true, then it checks for sources to be
3910 /// reverse of what x86 shuffles want.
3911 static bool isSHUFPMask(ArrayRef<int> Mask, MVT VT, bool Commuted = false) {
3913 unsigned NumElems = VT.getVectorNumElements();
3914 unsigned NumLanes = VT.getSizeInBits()/128;
3915 unsigned NumLaneElems = NumElems/NumLanes;
3917 if (NumLaneElems != 2 && NumLaneElems != 4)
3920 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
3921 bool symetricMaskRequired =
3922 (VT.getSizeInBits() >= 256) && (EltSize == 32);
3924 // VSHUFPSY divides the resulting vector into 4 chunks.
3925 // The sources are also splitted into 4 chunks, and each destination
3926 // chunk must come from a different source chunk.
3928 // SRC1 => X7 X6 X5 X4 X3 X2 X1 X0
3929 // SRC2 => Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y9
3931 // DST => Y7..Y4, Y7..Y4, X7..X4, X7..X4,
3932 // Y3..Y0, Y3..Y0, X3..X0, X3..X0
3934 // VSHUFPDY divides the resulting vector into 4 chunks.
3935 // The sources are also splitted into 4 chunks, and each destination
3936 // chunk must come from a different source chunk.
3938 // SRC1 => X3 X2 X1 X0
3939 // SRC2 => Y3 Y2 Y1 Y0
3941 // DST => Y3..Y2, X3..X2, Y1..Y0, X1..X0
3943 SmallVector<int, 4> MaskVal(NumLaneElems, -1);
3944 unsigned HalfLaneElems = NumLaneElems/2;
3945 for (unsigned l = 0; l != NumElems; l += NumLaneElems) {
3946 for (unsigned i = 0; i != NumLaneElems; ++i) {
3947 int Idx = Mask[i+l];
3948 unsigned RngStart = l + ((Commuted == (i<HalfLaneElems)) ? NumElems : 0);
3949 if (!isUndefOrInRange(Idx, RngStart, RngStart+NumLaneElems))
3951 // For VSHUFPSY, the mask of the second half must be the same as the
3952 // first but with the appropriate offsets. This works in the same way as
3953 // VPERMILPS works with masks.
3954 if (!symetricMaskRequired || Idx < 0)
3956 if (MaskVal[i] < 0) {
3957 MaskVal[i] = Idx - l;
3960 if ((signed)(Idx - l) != MaskVal[i])
3968 /// isMOVHLPSMask - Return true if the specified VECTOR_SHUFFLE operand
3969 /// specifies a shuffle of elements that is suitable for input to MOVHLPS.
3970 static bool isMOVHLPSMask(ArrayRef<int> Mask, MVT VT) {
3971 if (!VT.is128BitVector())
3974 unsigned NumElems = VT.getVectorNumElements();
3979 // Expect bit0 == 6, bit1 == 7, bit2 == 2, bit3 == 3
3980 return isUndefOrEqual(Mask[0], 6) &&
3981 isUndefOrEqual(Mask[1], 7) &&
3982 isUndefOrEqual(Mask[2], 2) &&
3983 isUndefOrEqual(Mask[3], 3);
3986 /// isMOVHLPS_v_undef_Mask - Special case of isMOVHLPSMask for canonical form
3987 /// of vector_shuffle v, v, <2, 3, 2, 3>, i.e. vector_shuffle v, undef,
3989 static bool isMOVHLPS_v_undef_Mask(ArrayRef<int> Mask, MVT VT) {
3990 if (!VT.is128BitVector())
3993 unsigned NumElems = VT.getVectorNumElements();
3998 return isUndefOrEqual(Mask[0], 2) &&
3999 isUndefOrEqual(Mask[1], 3) &&
4000 isUndefOrEqual(Mask[2], 2) &&
4001 isUndefOrEqual(Mask[3], 3);
4004 /// isMOVLPMask - Return true if the specified VECTOR_SHUFFLE operand
4005 /// specifies a shuffle of elements that is suitable for input to MOVLP{S|D}.
4006 static bool isMOVLPMask(ArrayRef<int> Mask, MVT VT) {
4007 if (!VT.is128BitVector())
4010 unsigned NumElems = VT.getVectorNumElements();
4012 if (NumElems != 2 && NumElems != 4)
4015 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
4016 if (!isUndefOrEqual(Mask[i], i + NumElems))
4019 for (unsigned i = NumElems/2, e = NumElems; i != e; ++i)
4020 if (!isUndefOrEqual(Mask[i], i))
4026 /// isMOVLHPSMask - Return true if the specified VECTOR_SHUFFLE operand
4027 /// specifies a shuffle of elements that is suitable for input to MOVLHPS.
4028 static bool isMOVLHPSMask(ArrayRef<int> Mask, MVT VT) {
4029 if (!VT.is128BitVector())
4032 unsigned NumElems = VT.getVectorNumElements();
4034 if (NumElems != 2 && NumElems != 4)
4037 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
4038 if (!isUndefOrEqual(Mask[i], i))
4041 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
4042 if (!isUndefOrEqual(Mask[i + e], i + NumElems))
4048 /// isINSERTPSMask - Return true if the specified VECTOR_SHUFFLE operand
4049 /// specifies a shuffle of elements that is suitable for input to INSERTPS.
4050 /// i. e: If all but one element come from the same vector.
4051 static bool isINSERTPSMask(ArrayRef<int> Mask, MVT VT) {
4052 // TODO: Deal with AVX's VINSERTPS
4053 if (!VT.is128BitVector() || (VT != MVT::v4f32 && VT != MVT::v4i32))
4056 unsigned CorrectPosV1 = 0;
4057 unsigned CorrectPosV2 = 0;
4058 for (int i = 0, e = (int)VT.getVectorNumElements(); i != e; ++i) {
4059 if (Mask[i] == -1) {
4067 else if (Mask[i] == i + 4)
4071 if (CorrectPosV1 == 3 || CorrectPosV2 == 3)
4072 // We have 3 elements (undefs count as elements from any vector) from one
4073 // vector, and one from another.
4080 // Some special combinations that can be optimized.
4083 SDValue Compact8x32ShuffleNode(ShuffleVectorSDNode *SVOp,
4084 SelectionDAG &DAG) {
4085 MVT VT = SVOp->getSimpleValueType(0);
4088 if (VT != MVT::v8i32 && VT != MVT::v8f32)
4091 ArrayRef<int> Mask = SVOp->getMask();
4093 // These are the special masks that may be optimized.
4094 static const int MaskToOptimizeEven[] = {0, 8, 2, 10, 4, 12, 6, 14};
4095 static const int MaskToOptimizeOdd[] = {1, 9, 3, 11, 5, 13, 7, 15};
4096 bool MatchEvenMask = true;
4097 bool MatchOddMask = true;
4098 for (int i=0; i<8; ++i) {
4099 if (!isUndefOrEqual(Mask[i], MaskToOptimizeEven[i]))
4100 MatchEvenMask = false;
4101 if (!isUndefOrEqual(Mask[i], MaskToOptimizeOdd[i]))
4102 MatchOddMask = false;
4105 if (!MatchEvenMask && !MatchOddMask)
4108 SDValue UndefNode = DAG.getNode(ISD::UNDEF, dl, VT);
4110 SDValue Op0 = SVOp->getOperand(0);
4111 SDValue Op1 = SVOp->getOperand(1);
4113 if (MatchEvenMask) {
4114 // Shift the second operand right to 32 bits.
4115 static const int ShiftRightMask[] = {-1, 0, -1, 2, -1, 4, -1, 6 };
4116 Op1 = DAG.getVectorShuffle(VT, dl, Op1, UndefNode, ShiftRightMask);
4118 // Shift the first operand left to 32 bits.
4119 static const int ShiftLeftMask[] = {1, -1, 3, -1, 5, -1, 7, -1 };
4120 Op0 = DAG.getVectorShuffle(VT, dl, Op0, UndefNode, ShiftLeftMask);
4122 static const int BlendMask[] = {0, 9, 2, 11, 4, 13, 6, 15};
4123 return DAG.getVectorShuffle(VT, dl, Op0, Op1, BlendMask);
4126 /// isUNPCKLMask - Return true if the specified VECTOR_SHUFFLE operand
4127 /// specifies a shuffle of elements that is suitable for input to UNPCKL.
4128 static bool isUNPCKLMask(ArrayRef<int> Mask, MVT VT,
4129 bool HasInt256, bool V2IsSplat = false) {
4131 assert(VT.getSizeInBits() >= 128 &&
4132 "Unsupported vector type for unpckl");
4134 // AVX defines UNPCK* to operate independently on 128-bit lanes.
4136 unsigned NumOf256BitLanes;
4137 unsigned NumElts = VT.getVectorNumElements();
4138 if (VT.is256BitVector()) {
4139 if (NumElts != 4 && NumElts != 8 &&
4140 (!HasInt256 || (NumElts != 16 && NumElts != 32)))
4143 NumOf256BitLanes = 1;
4144 } else if (VT.is512BitVector()) {
4145 assert(VT.getScalarType().getSizeInBits() >= 32 &&
4146 "Unsupported vector type for unpckh");
4148 NumOf256BitLanes = 2;
4151 NumOf256BitLanes = 1;
4154 unsigned NumEltsInStride = NumElts/NumOf256BitLanes;
4155 unsigned NumLaneElts = NumEltsInStride/NumLanes;
4157 for (unsigned l256 = 0; l256 < NumOf256BitLanes; l256 += 1) {
4158 for (unsigned l = 0; l != NumEltsInStride; l += NumLaneElts) {
4159 for (unsigned i = 0, j = l; i != NumLaneElts; i += 2, ++j) {
4160 int BitI = Mask[l256*NumEltsInStride+l+i];
4161 int BitI1 = Mask[l256*NumEltsInStride+l+i+1];
4162 if (!isUndefOrEqual(BitI, j+l256*NumElts))
4164 if (V2IsSplat && !isUndefOrEqual(BitI1, NumElts))
4166 if (!isUndefOrEqual(BitI1, j+l256*NumElts+NumEltsInStride))
4174 /// isUNPCKHMask - Return true if the specified VECTOR_SHUFFLE operand
4175 /// specifies a shuffle of elements that is suitable for input to UNPCKH.
4176 static bool isUNPCKHMask(ArrayRef<int> Mask, MVT VT,
4177 bool HasInt256, bool V2IsSplat = false) {
4178 assert(VT.getSizeInBits() >= 128 &&
4179 "Unsupported vector type for unpckh");
4181 // AVX defines UNPCK* to operate independently on 128-bit lanes.
4183 unsigned NumOf256BitLanes;
4184 unsigned NumElts = VT.getVectorNumElements();
4185 if (VT.is256BitVector()) {
4186 if (NumElts != 4 && NumElts != 8 &&
4187 (!HasInt256 || (NumElts != 16 && NumElts != 32)))
4190 NumOf256BitLanes = 1;
4191 } else if (VT.is512BitVector()) {
4192 assert(VT.getScalarType().getSizeInBits() >= 32 &&
4193 "Unsupported vector type for unpckh");
4195 NumOf256BitLanes = 2;
4198 NumOf256BitLanes = 1;
4201 unsigned NumEltsInStride = NumElts/NumOf256BitLanes;
4202 unsigned NumLaneElts = NumEltsInStride/NumLanes;
4204 for (unsigned l256 = 0; l256 < NumOf256BitLanes; l256 += 1) {
4205 for (unsigned l = 0; l != NumEltsInStride; l += NumLaneElts) {
4206 for (unsigned i = 0, j = l+NumLaneElts/2; i != NumLaneElts; i += 2, ++j) {
4207 int BitI = Mask[l256*NumEltsInStride+l+i];
4208 int BitI1 = Mask[l256*NumEltsInStride+l+i+1];
4209 if (!isUndefOrEqual(BitI, j+l256*NumElts))
4211 if (V2IsSplat && !isUndefOrEqual(BitI1, NumElts))
4213 if (!isUndefOrEqual(BitI1, j+l256*NumElts+NumEltsInStride))
4221 /// isUNPCKL_v_undef_Mask - Special case of isUNPCKLMask for canonical form
4222 /// of vector_shuffle v, v, <0, 4, 1, 5>, i.e. vector_shuffle v, undef,
4224 static bool isUNPCKL_v_undef_Mask(ArrayRef<int> Mask, MVT VT, bool HasInt256) {
4225 unsigned NumElts = VT.getVectorNumElements();
4226 bool Is256BitVec = VT.is256BitVector();
4228 if (VT.is512BitVector())
4230 assert((VT.is128BitVector() || VT.is256BitVector()) &&
4231 "Unsupported vector type for unpckh");
4233 if (Is256BitVec && NumElts != 4 && NumElts != 8 &&
4234 (!HasInt256 || (NumElts != 16 && NumElts != 32)))
4237 // For 256-bit i64/f64, use MOVDDUPY instead, so reject the matching pattern
4238 // FIXME: Need a better way to get rid of this, there's no latency difference
4239 // between UNPCKLPD and MOVDDUP, the later should always be checked first and
4240 // the former later. We should also remove the "_undef" special mask.
4241 if (NumElts == 4 && Is256BitVec)
4244 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
4245 // independently on 128-bit lanes.
4246 unsigned NumLanes = VT.getSizeInBits()/128;
4247 unsigned NumLaneElts = NumElts/NumLanes;
4249 for (unsigned l = 0; l != NumElts; l += NumLaneElts) {
4250 for (unsigned i = 0, j = l; i != NumLaneElts; i += 2, ++j) {
4251 int BitI = Mask[l+i];
4252 int BitI1 = Mask[l+i+1];
4254 if (!isUndefOrEqual(BitI, j))
4256 if (!isUndefOrEqual(BitI1, j))
4264 /// isUNPCKH_v_undef_Mask - Special case of isUNPCKHMask for canonical form
4265 /// of vector_shuffle v, v, <2, 6, 3, 7>, i.e. vector_shuffle v, undef,
4267 static bool isUNPCKH_v_undef_Mask(ArrayRef<int> Mask, MVT VT, bool HasInt256) {
4268 unsigned NumElts = VT.getVectorNumElements();
4270 if (VT.is512BitVector())
4273 assert((VT.is128BitVector() || VT.is256BitVector()) &&
4274 "Unsupported vector type for unpckh");
4276 if (VT.is256BitVector() && NumElts != 4 && NumElts != 8 &&
4277 (!HasInt256 || (NumElts != 16 && NumElts != 32)))
4280 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
4281 // independently on 128-bit lanes.
4282 unsigned NumLanes = VT.getSizeInBits()/128;
4283 unsigned NumLaneElts = NumElts/NumLanes;
4285 for (unsigned l = 0; l != NumElts; l += NumLaneElts) {
4286 for (unsigned i = 0, j = l+NumLaneElts/2; i != NumLaneElts; i += 2, ++j) {
4287 int BitI = Mask[l+i];
4288 int BitI1 = Mask[l+i+1];
4289 if (!isUndefOrEqual(BitI, j))
4291 if (!isUndefOrEqual(BitI1, j))
4298 // Match for INSERTI64x4 INSERTF64x4 instructions (src0[0], src1[0]) or
4299 // (src1[0], src0[1]), manipulation with 256-bit sub-vectors
4300 static bool isINSERT64x4Mask(ArrayRef<int> Mask, MVT VT, unsigned int *Imm) {
4301 if (!VT.is512BitVector())
4304 unsigned NumElts = VT.getVectorNumElements();
4305 unsigned HalfSize = NumElts/2;
4306 if (isSequentialOrUndefInRange(Mask, 0, HalfSize, 0)) {
4307 if (isSequentialOrUndefInRange(Mask, HalfSize, HalfSize, NumElts)) {
4312 if (isSequentialOrUndefInRange(Mask, 0, HalfSize, NumElts)) {
4313 if (isSequentialOrUndefInRange(Mask, HalfSize, HalfSize, HalfSize)) {
4321 /// isMOVLMask - Return true if the specified VECTOR_SHUFFLE operand
4322 /// specifies a shuffle of elements that is suitable for input to MOVSS,
4323 /// MOVSD, and MOVD, i.e. setting the lowest element.
4324 static bool isMOVLMask(ArrayRef<int> Mask, EVT VT) {
4325 if (VT.getVectorElementType().getSizeInBits() < 32)
4327 if (!VT.is128BitVector())
4330 unsigned NumElts = VT.getVectorNumElements();
4332 if (!isUndefOrEqual(Mask[0], NumElts))
4335 for (unsigned i = 1; i != NumElts; ++i)
4336 if (!isUndefOrEqual(Mask[i], i))
4342 /// isVPERM2X128Mask - Match 256-bit shuffles where the elements are considered
4343 /// as permutations between 128-bit chunks or halves. As an example: this
4345 /// vector_shuffle <4, 5, 6, 7, 12, 13, 14, 15>
4346 /// The first half comes from the second half of V1 and the second half from the
4347 /// the second half of V2.
4348 static bool isVPERM2X128Mask(ArrayRef<int> Mask, MVT VT, bool HasFp256) {
4349 if (!HasFp256 || !VT.is256BitVector())
4352 // The shuffle result is divided into half A and half B. In total the two
4353 // sources have 4 halves, namely: C, D, E, F. The final values of A and
4354 // B must come from C, D, E or F.
4355 unsigned HalfSize = VT.getVectorNumElements()/2;
4356 bool MatchA = false, MatchB = false;
4358 // Check if A comes from one of C, D, E, F.
4359 for (unsigned Half = 0; Half != 4; ++Half) {
4360 if (isSequentialOrUndefInRange(Mask, 0, HalfSize, Half*HalfSize)) {
4366 // Check if B comes from one of C, D, E, F.
4367 for (unsigned Half = 0; Half != 4; ++Half) {
4368 if (isSequentialOrUndefInRange(Mask, HalfSize, HalfSize, Half*HalfSize)) {
4374 return MatchA && MatchB;
4377 /// getShuffleVPERM2X128Immediate - Return the appropriate immediate to shuffle
4378 /// the specified VECTOR_MASK mask with VPERM2F128/VPERM2I128 instructions.
4379 static unsigned getShuffleVPERM2X128Immediate(ShuffleVectorSDNode *SVOp) {
4380 MVT VT = SVOp->getSimpleValueType(0);
4382 unsigned HalfSize = VT.getVectorNumElements()/2;
4384 unsigned FstHalf = 0, SndHalf = 0;
4385 for (unsigned i = 0; i < HalfSize; ++i) {
4386 if (SVOp->getMaskElt(i) > 0) {
4387 FstHalf = SVOp->getMaskElt(i)/HalfSize;
4391 for (unsigned i = HalfSize; i < HalfSize*2; ++i) {
4392 if (SVOp->getMaskElt(i) > 0) {
4393 SndHalf = SVOp->getMaskElt(i)/HalfSize;
4398 return (FstHalf | (SndHalf << 4));
4401 // Symetric in-lane mask. Each lane has 4 elements (for imm8)
4402 static bool isPermImmMask(ArrayRef<int> Mask, MVT VT, unsigned& Imm8) {
4403 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
4407 unsigned NumElts = VT.getVectorNumElements();
4409 if (VT.is128BitVector() || (VT.is256BitVector() && EltSize == 64)) {
4410 for (unsigned i = 0; i != NumElts; ++i) {
4413 Imm8 |= Mask[i] << (i*2);
4418 unsigned LaneSize = 4;
4419 SmallVector<int, 4> MaskVal(LaneSize, -1);
4421 for (unsigned l = 0; l != NumElts; l += LaneSize) {
4422 for (unsigned i = 0; i != LaneSize; ++i) {
4423 if (!isUndefOrInRange(Mask[i+l], l, l+LaneSize))
4427 if (MaskVal[i] < 0) {
4428 MaskVal[i] = Mask[i+l] - l;
4429 Imm8 |= MaskVal[i] << (i*2);
4432 if (Mask[i+l] != (signed)(MaskVal[i]+l))
4439 /// isVPERMILPMask - Return true if the specified VECTOR_SHUFFLE operand
4440 /// specifies a shuffle of elements that is suitable for input to VPERMILPD*.
4441 /// Note that VPERMIL mask matching is different depending whether theunderlying
4442 /// type is 32 or 64. In the VPERMILPS the high half of the mask should point
4443 /// to the same elements of the low, but to the higher half of the source.
4444 /// In VPERMILPD the two lanes could be shuffled independently of each other
4445 /// with the same restriction that lanes can't be crossed. Also handles PSHUFDY.
4446 static bool isVPERMILPMask(ArrayRef<int> Mask, MVT VT) {
4447 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
4448 if (VT.getSizeInBits() < 256 || EltSize < 32)
4450 bool symetricMaskRequired = (EltSize == 32);
4451 unsigned NumElts = VT.getVectorNumElements();
4453 unsigned NumLanes = VT.getSizeInBits()/128;
4454 unsigned LaneSize = NumElts/NumLanes;
4455 // 2 or 4 elements in one lane
4457 SmallVector<int, 4> ExpectedMaskVal(LaneSize, -1);
4458 for (unsigned l = 0; l != NumElts; l += LaneSize) {
4459 for (unsigned i = 0; i != LaneSize; ++i) {
4460 if (!isUndefOrInRange(Mask[i+l], l, l+LaneSize))
4462 if (symetricMaskRequired) {
4463 if (ExpectedMaskVal[i] < 0 && Mask[i+l] >= 0) {
4464 ExpectedMaskVal[i] = Mask[i+l] - l;
4467 if (!isUndefOrEqual(Mask[i+l], ExpectedMaskVal[i]+l))
4475 /// isCommutedMOVLMask - Returns true if the shuffle mask is except the reverse
4476 /// of what x86 movss want. X86 movs requires the lowest element to be lowest
4477 /// element of vector 2 and the other elements to come from vector 1 in order.
4478 static bool isCommutedMOVLMask(ArrayRef<int> Mask, MVT VT,
4479 bool V2IsSplat = false, bool V2IsUndef = false) {
4480 if (!VT.is128BitVector())
4483 unsigned NumOps = VT.getVectorNumElements();
4484 if (NumOps != 2 && NumOps != 4 && NumOps != 8 && NumOps != 16)
4487 if (!isUndefOrEqual(Mask[0], 0))
4490 for (unsigned i = 1; i != NumOps; ++i)
4491 if (!(isUndefOrEqual(Mask[i], i+NumOps) ||
4492 (V2IsUndef && isUndefOrInRange(Mask[i], NumOps, NumOps*2)) ||
4493 (V2IsSplat && isUndefOrEqual(Mask[i], NumOps))))
4499 /// isMOVSHDUPMask - Return true if the specified VECTOR_SHUFFLE operand
4500 /// specifies a shuffle of elements that is suitable for input to MOVSHDUP.
4501 /// Masks to match: <1, 1, 3, 3> or <1, 1, 3, 3, 5, 5, 7, 7>
4502 static bool isMOVSHDUPMask(ArrayRef<int> Mask, MVT VT,
4503 const X86Subtarget *Subtarget) {
4504 if (!Subtarget->hasSSE3())
4507 unsigned NumElems = VT.getVectorNumElements();
4509 if ((VT.is128BitVector() && NumElems != 4) ||
4510 (VT.is256BitVector() && NumElems != 8) ||
4511 (VT.is512BitVector() && NumElems != 16))
4514 // "i+1" is the value the indexed mask element must have
4515 for (unsigned i = 0; i != NumElems; i += 2)
4516 if (!isUndefOrEqual(Mask[i], i+1) ||
4517 !isUndefOrEqual(Mask[i+1], i+1))
4523 /// isMOVSLDUPMask - Return true if the specified VECTOR_SHUFFLE operand
4524 /// specifies a shuffle of elements that is suitable for input to MOVSLDUP.
4525 /// Masks to match: <0, 0, 2, 2> or <0, 0, 2, 2, 4, 4, 6, 6>
4526 static bool isMOVSLDUPMask(ArrayRef<int> Mask, MVT VT,
4527 const X86Subtarget *Subtarget) {
4528 if (!Subtarget->hasSSE3())
4531 unsigned NumElems = VT.getVectorNumElements();
4533 if ((VT.is128BitVector() && NumElems != 4) ||
4534 (VT.is256BitVector() && NumElems != 8) ||
4535 (VT.is512BitVector() && NumElems != 16))
4538 // "i" is the value the indexed mask element must have
4539 for (unsigned i = 0; i != NumElems; i += 2)
4540 if (!isUndefOrEqual(Mask[i], i) ||
4541 !isUndefOrEqual(Mask[i+1], i))
4547 /// isMOVDDUPYMask - Return true if the specified VECTOR_SHUFFLE operand
4548 /// specifies a shuffle of elements that is suitable for input to 256-bit
4549 /// version of MOVDDUP.
4550 static bool isMOVDDUPYMask(ArrayRef<int> Mask, MVT VT, bool HasFp256) {
4551 if (!HasFp256 || !VT.is256BitVector())
4554 unsigned NumElts = VT.getVectorNumElements();
4558 for (unsigned i = 0; i != NumElts/2; ++i)
4559 if (!isUndefOrEqual(Mask[i], 0))
4561 for (unsigned i = NumElts/2; i != NumElts; ++i)
4562 if (!isUndefOrEqual(Mask[i], NumElts/2))
4567 /// isMOVDDUPMask - Return true if the specified VECTOR_SHUFFLE operand
4568 /// specifies a shuffle of elements that is suitable for input to 128-bit
4569 /// version of MOVDDUP.
4570 static bool isMOVDDUPMask(ArrayRef<int> Mask, MVT VT) {
4571 if (!VT.is128BitVector())
4574 unsigned e = VT.getVectorNumElements() / 2;
4575 for (unsigned i = 0; i != e; ++i)
4576 if (!isUndefOrEqual(Mask[i], i))
4578 for (unsigned i = 0; i != e; ++i)
4579 if (!isUndefOrEqual(Mask[e+i], i))
4584 /// isVEXTRACTIndex - Return true if the specified
4585 /// EXTRACT_SUBVECTOR operand specifies a vector extract that is
4586 /// suitable for instruction that extract 128 or 256 bit vectors
4587 static bool isVEXTRACTIndex(SDNode *N, unsigned vecWidth) {
4588 assert((vecWidth == 128 || vecWidth == 256) && "Unexpected vector width");
4589 if (!isa<ConstantSDNode>(N->getOperand(1).getNode()))
4592 // The index should be aligned on a vecWidth-bit boundary.
4594 cast<ConstantSDNode>(N->getOperand(1).getNode())->getZExtValue();
4596 MVT VT = N->getSimpleValueType(0);
4597 unsigned ElSize = VT.getVectorElementType().getSizeInBits();
4598 bool Result = (Index * ElSize) % vecWidth == 0;
4603 /// isVINSERTIndex - Return true if the specified INSERT_SUBVECTOR
4604 /// operand specifies a subvector insert that is suitable for input to
4605 /// insertion of 128 or 256-bit subvectors
4606 static bool isVINSERTIndex(SDNode *N, unsigned vecWidth) {
4607 assert((vecWidth == 128 || vecWidth == 256) && "Unexpected vector width");
4608 if (!isa<ConstantSDNode>(N->getOperand(2).getNode()))
4610 // The index should be aligned on a vecWidth-bit boundary.
4612 cast<ConstantSDNode>(N->getOperand(2).getNode())->getZExtValue();
4614 MVT VT = N->getSimpleValueType(0);
4615 unsigned ElSize = VT.getVectorElementType().getSizeInBits();
4616 bool Result = (Index * ElSize) % vecWidth == 0;
4621 bool X86::isVINSERT128Index(SDNode *N) {
4622 return isVINSERTIndex(N, 128);
4625 bool X86::isVINSERT256Index(SDNode *N) {
4626 return isVINSERTIndex(N, 256);
4629 bool X86::isVEXTRACT128Index(SDNode *N) {
4630 return isVEXTRACTIndex(N, 128);
4633 bool X86::isVEXTRACT256Index(SDNode *N) {
4634 return isVEXTRACTIndex(N, 256);
4637 /// getShuffleSHUFImmediate - Return the appropriate immediate to shuffle
4638 /// the specified VECTOR_SHUFFLE mask with PSHUF* and SHUFP* instructions.
4639 /// Handles 128-bit and 256-bit.
4640 static unsigned getShuffleSHUFImmediate(ShuffleVectorSDNode *N) {
4641 MVT VT = N->getSimpleValueType(0);
4643 assert((VT.getSizeInBits() >= 128) &&
4644 "Unsupported vector type for PSHUF/SHUFP");
4646 // Handle 128 and 256-bit vector lengths. AVX defines PSHUF/SHUFP to operate
4647 // independently on 128-bit lanes.
4648 unsigned NumElts = VT.getVectorNumElements();
4649 unsigned NumLanes = VT.getSizeInBits()/128;
4650 unsigned NumLaneElts = NumElts/NumLanes;
4652 assert((NumLaneElts == 2 || NumLaneElts == 4 || NumLaneElts == 8) &&
4653 "Only supports 2, 4 or 8 elements per lane");
4655 unsigned Shift = (NumLaneElts >= 4) ? 1 : 0;
4657 for (unsigned i = 0; i != NumElts; ++i) {
4658 int Elt = N->getMaskElt(i);
4659 if (Elt < 0) continue;
4660 Elt &= NumLaneElts - 1;
4661 unsigned ShAmt = (i << Shift) % 8;
4662 Mask |= Elt << ShAmt;
4668 /// getShufflePSHUFHWImmediate - Return the appropriate immediate to shuffle
4669 /// the specified VECTOR_SHUFFLE mask with the PSHUFHW instruction.
4670 static unsigned getShufflePSHUFHWImmediate(ShuffleVectorSDNode *N) {
4671 MVT VT = N->getSimpleValueType(0);
4673 assert((VT == MVT::v8i16 || VT == MVT::v16i16) &&
4674 "Unsupported vector type for PSHUFHW");
4676 unsigned NumElts = VT.getVectorNumElements();
4679 for (unsigned l = 0; l != NumElts; l += 8) {
4680 // 8 nodes per lane, but we only care about the last 4.
4681 for (unsigned i = 0; i < 4; ++i) {
4682 int Elt = N->getMaskElt(l+i+4);
4683 if (Elt < 0) continue;
4684 Elt &= 0x3; // only 2-bits.
4685 Mask |= Elt << (i * 2);
4692 /// getShufflePSHUFLWImmediate - Return the appropriate immediate to shuffle
4693 /// the specified VECTOR_SHUFFLE mask with the PSHUFLW instruction.
4694 static unsigned getShufflePSHUFLWImmediate(ShuffleVectorSDNode *N) {
4695 MVT VT = N->getSimpleValueType(0);
4697 assert((VT == MVT::v8i16 || VT == MVT::v16i16) &&
4698 "Unsupported vector type for PSHUFHW");
4700 unsigned NumElts = VT.getVectorNumElements();
4703 for (unsigned l = 0; l != NumElts; l += 8) {
4704 // 8 nodes per lane, but we only care about the first 4.
4705 for (unsigned i = 0; i < 4; ++i) {
4706 int Elt = N->getMaskElt(l+i);
4707 if (Elt < 0) continue;
4708 Elt &= 0x3; // only 2-bits
4709 Mask |= Elt << (i * 2);
4716 /// \brief Return the appropriate immediate to shuffle the specified
4717 /// VECTOR_SHUFFLE mask with the PALIGNR (if InterLane is false) or with
4718 /// VALIGN (if Interlane is true) instructions.
4719 static unsigned getShuffleAlignrImmediate(ShuffleVectorSDNode *SVOp,
4721 MVT VT = SVOp->getSimpleValueType(0);
4722 unsigned EltSize = InterLane ? 1 :
4723 VT.getVectorElementType().getSizeInBits() >> 3;
4725 unsigned NumElts = VT.getVectorNumElements();
4726 unsigned NumLanes = VT.is512BitVector() ? 1 : VT.getSizeInBits()/128;
4727 unsigned NumLaneElts = NumElts/NumLanes;
4731 for (i = 0; i != NumElts; ++i) {
4732 Val = SVOp->getMaskElt(i);
4736 if (Val >= (int)NumElts)
4737 Val -= NumElts - NumLaneElts;
4739 assert(Val - i > 0 && "PALIGNR imm should be positive");
4740 return (Val - i) * EltSize;
4743 /// \brief Return the appropriate immediate to shuffle the specified
4744 /// VECTOR_SHUFFLE mask with the PALIGNR instruction.
4745 static unsigned getShufflePALIGNRImmediate(ShuffleVectorSDNode *SVOp) {
4746 return getShuffleAlignrImmediate(SVOp, false);
4749 /// \brief Return the appropriate immediate to shuffle the specified
4750 /// VECTOR_SHUFFLE mask with the VALIGN instruction.
4751 static unsigned getShuffleVALIGNImmediate(ShuffleVectorSDNode *SVOp) {
4752 return getShuffleAlignrImmediate(SVOp, true);
4756 static unsigned getExtractVEXTRACTImmediate(SDNode *N, unsigned vecWidth) {
4757 assert((vecWidth == 128 || vecWidth == 256) && "Unsupported vector width");
4758 if (!isa<ConstantSDNode>(N->getOperand(1).getNode()))
4759 llvm_unreachable("Illegal extract subvector for VEXTRACT");
4762 cast<ConstantSDNode>(N->getOperand(1).getNode())->getZExtValue();
4764 MVT VecVT = N->getOperand(0).getSimpleValueType();
4765 MVT ElVT = VecVT.getVectorElementType();
4767 unsigned NumElemsPerChunk = vecWidth / ElVT.getSizeInBits();
4768 return Index / NumElemsPerChunk;
4771 static unsigned getInsertVINSERTImmediate(SDNode *N, unsigned vecWidth) {
4772 assert((vecWidth == 128 || vecWidth == 256) && "Unsupported vector width");
4773 if (!isa<ConstantSDNode>(N->getOperand(2).getNode()))
4774 llvm_unreachable("Illegal insert subvector for VINSERT");
4777 cast<ConstantSDNode>(N->getOperand(2).getNode())->getZExtValue();
4779 MVT VecVT = N->getSimpleValueType(0);
4780 MVT ElVT = VecVT.getVectorElementType();
4782 unsigned NumElemsPerChunk = vecWidth / ElVT.getSizeInBits();
4783 return Index / NumElemsPerChunk;
4786 /// getExtractVEXTRACT128Immediate - Return the appropriate immediate
4787 /// to extract the specified EXTRACT_SUBVECTOR index with VEXTRACTF128
4788 /// and VINSERTI128 instructions.
4789 unsigned X86::getExtractVEXTRACT128Immediate(SDNode *N) {
4790 return getExtractVEXTRACTImmediate(N, 128);
4793 /// getExtractVEXTRACT256Immediate - Return the appropriate immediate
4794 /// to extract the specified EXTRACT_SUBVECTOR index with VEXTRACTF64x4
4795 /// and VINSERTI64x4 instructions.
4796 unsigned X86::getExtractVEXTRACT256Immediate(SDNode *N) {
4797 return getExtractVEXTRACTImmediate(N, 256);
4800 /// getInsertVINSERT128Immediate - Return the appropriate immediate
4801 /// to insert at the specified INSERT_SUBVECTOR index with VINSERTF128
4802 /// and VINSERTI128 instructions.
4803 unsigned X86::getInsertVINSERT128Immediate(SDNode *N) {
4804 return getInsertVINSERTImmediate(N, 128);
4807 /// getInsertVINSERT256Immediate - Return the appropriate immediate
4808 /// to insert at the specified INSERT_SUBVECTOR index with VINSERTF46x4
4809 /// and VINSERTI64x4 instructions.
4810 unsigned X86::getInsertVINSERT256Immediate(SDNode *N) {
4811 return getInsertVINSERTImmediate(N, 256);
4814 /// isZero - Returns true if Elt is a constant integer zero
4815 static bool isZero(SDValue V) {
4816 ConstantSDNode *C = dyn_cast<ConstantSDNode>(V);
4817 return C && C->isNullValue();
4820 /// isZeroNode - Returns true if Elt is a constant zero or a floating point
4822 bool X86::isZeroNode(SDValue Elt) {
4825 if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Elt))
4826 return CFP->getValueAPF().isPosZero();
4830 /// ShouldXformToMOVHLPS - Return true if the node should be transformed to
4831 /// match movhlps. The lower half elements should come from upper half of
4832 /// V1 (and in order), and the upper half elements should come from the upper
4833 /// half of V2 (and in order).
4834 static bool ShouldXformToMOVHLPS(ArrayRef<int> Mask, MVT VT) {
4835 if (!VT.is128BitVector())
4837 if (VT.getVectorNumElements() != 4)
4839 for (unsigned i = 0, e = 2; i != e; ++i)
4840 if (!isUndefOrEqual(Mask[i], i+2))
4842 for (unsigned i = 2; i != 4; ++i)
4843 if (!isUndefOrEqual(Mask[i], i+4))
4848 /// isScalarLoadToVector - Returns true if the node is a scalar load that
4849 /// is promoted to a vector. It also returns the LoadSDNode by reference if
4851 static bool isScalarLoadToVector(SDNode *N, LoadSDNode **LD = nullptr) {
4852 if (N->getOpcode() != ISD::SCALAR_TO_VECTOR)
4854 N = N->getOperand(0).getNode();
4855 if (!ISD::isNON_EXTLoad(N))
4858 *LD = cast<LoadSDNode>(N);
4862 // Test whether the given value is a vector value which will be legalized
4864 static bool WillBeConstantPoolLoad(SDNode *N) {
4865 if (N->getOpcode() != ISD::BUILD_VECTOR)
4868 // Check for any non-constant elements.
4869 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
4870 switch (N->getOperand(i).getNode()->getOpcode()) {
4872 case ISD::ConstantFP:
4879 // Vectors of all-zeros and all-ones are materialized with special
4880 // instructions rather than being loaded.
4881 return !ISD::isBuildVectorAllZeros(N) &&
4882 !ISD::isBuildVectorAllOnes(N);
4885 /// ShouldXformToMOVLP{S|D} - Return true if the node should be transformed to
4886 /// match movlp{s|d}. The lower half elements should come from lower half of
4887 /// V1 (and in order), and the upper half elements should come from the upper
4888 /// half of V2 (and in order). And since V1 will become the source of the
4889 /// MOVLP, it must be either a vector load or a scalar load to vector.
4890 static bool ShouldXformToMOVLP(SDNode *V1, SDNode *V2,
4891 ArrayRef<int> Mask, MVT VT) {
4892 if (!VT.is128BitVector())
4895 if (!ISD::isNON_EXTLoad(V1) && !isScalarLoadToVector(V1))
4897 // Is V2 is a vector load, don't do this transformation. We will try to use
4898 // load folding shufps op.
4899 if (ISD::isNON_EXTLoad(V2) || WillBeConstantPoolLoad(V2))
4902 unsigned NumElems = VT.getVectorNumElements();
4904 if (NumElems != 2 && NumElems != 4)
4906 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
4907 if (!isUndefOrEqual(Mask[i], i))
4909 for (unsigned i = NumElems/2, e = NumElems; i != e; ++i)
4910 if (!isUndefOrEqual(Mask[i], i+NumElems))
4915 /// isZeroShuffle - Returns true if N is a VECTOR_SHUFFLE that can be resolved
4916 /// to an zero vector.
4917 /// FIXME: move to dag combiner / method on ShuffleVectorSDNode
4918 static bool isZeroShuffle(ShuffleVectorSDNode *N) {
4919 SDValue V1 = N->getOperand(0);
4920 SDValue V2 = N->getOperand(1);
4921 unsigned NumElems = N->getValueType(0).getVectorNumElements();
4922 for (unsigned i = 0; i != NumElems; ++i) {
4923 int Idx = N->getMaskElt(i);
4924 if (Idx >= (int)NumElems) {
4925 unsigned Opc = V2.getOpcode();
4926 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V2.getNode()))
4928 if (Opc != ISD::BUILD_VECTOR ||
4929 !X86::isZeroNode(V2.getOperand(Idx-NumElems)))
4931 } else if (Idx >= 0) {
4932 unsigned Opc = V1.getOpcode();
4933 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V1.getNode()))
4935 if (Opc != ISD::BUILD_VECTOR ||
4936 !X86::isZeroNode(V1.getOperand(Idx)))
4943 /// getZeroVector - Returns a vector of specified type with all zero elements.
4945 static SDValue getZeroVector(EVT VT, const X86Subtarget *Subtarget,
4946 SelectionDAG &DAG, SDLoc dl) {
4947 assert(VT.isVector() && "Expected a vector type");
4949 // Always build SSE zero vectors as <4 x i32> bitcasted
4950 // to their dest type. This ensures they get CSE'd.
4952 if (VT.is128BitVector()) { // SSE
4953 if (Subtarget->hasSSE2()) { // SSE2
4954 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
4955 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
4957 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
4958 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4f32, Cst, Cst, Cst, Cst);
4960 } else if (VT.is256BitVector()) { // AVX
4961 if (Subtarget->hasInt256()) { // AVX2
4962 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
4963 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
4964 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8i32, Ops);
4966 // 256-bit logic and arithmetic instructions in AVX are all
4967 // floating-point, no support for integer ops. Emit fp zeroed vectors.
4968 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
4969 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
4970 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8f32, Ops);
4972 } else if (VT.is512BitVector()) { // AVX-512
4973 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
4974 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst,
4975 Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
4976 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v16i32, Ops);
4977 } else if (VT.getScalarType() == MVT::i1) {
4978 assert(VT.getVectorNumElements() <= 16 && "Unexpected vector type");
4979 SDValue Cst = DAG.getTargetConstant(0, MVT::i1);
4980 SmallVector<SDValue, 16> Ops(VT.getVectorNumElements(), Cst);
4981 return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, Ops);
4983 llvm_unreachable("Unexpected vector type");
4985 return DAG.getNode(ISD::BITCAST, dl, VT, Vec);
4988 /// getOnesVector - Returns a vector of specified type with all bits set.
4989 /// Always build ones vectors as <4 x i32> or <8 x i32>. For 256-bit types with
4990 /// no AVX2 supprt, use two <4 x i32> inserted in a <8 x i32> appropriately.
4991 /// Then bitcast to their original type, ensuring they get CSE'd.
4992 static SDValue getOnesVector(MVT VT, bool HasInt256, SelectionDAG &DAG,
4994 assert(VT.isVector() && "Expected a vector type");
4996 SDValue Cst = DAG.getTargetConstant(~0U, MVT::i32);
4998 if (VT.is256BitVector()) {
4999 if (HasInt256) { // AVX2
5000 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
5001 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8i32, Ops);
5003 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
5004 Vec = Concat128BitVectors(Vec, Vec, MVT::v8i32, 8, DAG, dl);
5006 } else if (VT.is128BitVector()) {
5007 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
5009 llvm_unreachable("Unexpected vector type");
5011 return DAG.getNode(ISD::BITCAST, dl, VT, Vec);
5014 /// NormalizeMask - V2 is a splat, modify the mask (if needed) so all elements
5015 /// that point to V2 points to its first element.
5016 static void NormalizeMask(SmallVectorImpl<int> &Mask, unsigned NumElems) {
5017 for (unsigned i = 0; i != NumElems; ++i) {
5018 if (Mask[i] > (int)NumElems) {
5024 /// getMOVLMask - Returns a vector_shuffle mask for an movs{s|d}, movd
5025 /// operation of specified width.
5026 static SDValue getMOVL(SelectionDAG &DAG, SDLoc dl, EVT VT, SDValue V1,
5028 unsigned NumElems = VT.getVectorNumElements();
5029 SmallVector<int, 8> Mask;
5030 Mask.push_back(NumElems);
5031 for (unsigned i = 1; i != NumElems; ++i)
5033 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
5036 /// getUnpackl - Returns a vector_shuffle node for an unpackl operation.
5037 static SDValue getUnpackl(SelectionDAG &DAG, SDLoc dl, MVT VT, SDValue V1,
5039 unsigned NumElems = VT.getVectorNumElements();
5040 SmallVector<int, 8> Mask;
5041 for (unsigned i = 0, e = NumElems/2; i != e; ++i) {
5043 Mask.push_back(i + NumElems);
5045 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
5048 /// getUnpackh - Returns a vector_shuffle node for an unpackh operation.
5049 static SDValue getUnpackh(SelectionDAG &DAG, SDLoc dl, MVT VT, SDValue V1,
5051 unsigned NumElems = VT.getVectorNumElements();
5052 SmallVector<int, 8> Mask;
5053 for (unsigned i = 0, Half = NumElems/2; i != Half; ++i) {
5054 Mask.push_back(i + Half);
5055 Mask.push_back(i + NumElems + Half);
5057 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
5060 // PromoteSplati8i16 - All i16 and i8 vector types can't be used directly by
5061 // a generic shuffle instruction because the target has no such instructions.
5062 // Generate shuffles which repeat i16 and i8 several times until they can be
5063 // represented by v4f32 and then be manipulated by target suported shuffles.
5064 static SDValue PromoteSplati8i16(SDValue V, SelectionDAG &DAG, int &EltNo) {
5065 MVT VT = V.getSimpleValueType();
5066 int NumElems = VT.getVectorNumElements();
5069 while (NumElems > 4) {
5070 if (EltNo < NumElems/2) {
5071 V = getUnpackl(DAG, dl, VT, V, V);
5073 V = getUnpackh(DAG, dl, VT, V, V);
5074 EltNo -= NumElems/2;
5081 /// getLegalSplat - Generate a legal splat with supported x86 shuffles
5082 static SDValue getLegalSplat(SelectionDAG &DAG, SDValue V, int EltNo) {
5083 MVT VT = V.getSimpleValueType();
5086 if (VT.is128BitVector()) {
5087 V = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, V);
5088 int SplatMask[4] = { EltNo, EltNo, EltNo, EltNo };
5089 V = DAG.getVectorShuffle(MVT::v4f32, dl, V, DAG.getUNDEF(MVT::v4f32),
5091 } else if (VT.is256BitVector()) {
5092 // To use VPERMILPS to splat scalars, the second half of indicies must
5093 // refer to the higher part, which is a duplication of the lower one,
5094 // because VPERMILPS can only handle in-lane permutations.
5095 int SplatMask[8] = { EltNo, EltNo, EltNo, EltNo,
5096 EltNo+4, EltNo+4, EltNo+4, EltNo+4 };
5098 V = DAG.getNode(ISD::BITCAST, dl, MVT::v8f32, V);
5099 V = DAG.getVectorShuffle(MVT::v8f32, dl, V, DAG.getUNDEF(MVT::v8f32),
5102 llvm_unreachable("Vector size not supported");
5104 return DAG.getNode(ISD::BITCAST, dl, VT, V);
5107 /// PromoteSplat - Splat is promoted to target supported vector shuffles.
5108 static SDValue PromoteSplat(ShuffleVectorSDNode *SV, SelectionDAG &DAG) {
5109 MVT SrcVT = SV->getSimpleValueType(0);
5110 SDValue V1 = SV->getOperand(0);
5113 int EltNo = SV->getSplatIndex();
5114 int NumElems = SrcVT.getVectorNumElements();
5115 bool Is256BitVec = SrcVT.is256BitVector();
5117 assert(((SrcVT.is128BitVector() && NumElems > 4) || Is256BitVec) &&
5118 "Unknown how to promote splat for type");
5120 // Extract the 128-bit part containing the splat element and update
5121 // the splat element index when it refers to the higher register.
5123 V1 = Extract128BitVector(V1, EltNo, DAG, dl);
5124 if (EltNo >= NumElems/2)
5125 EltNo -= NumElems/2;
5128 // All i16 and i8 vector types can't be used directly by a generic shuffle
5129 // instruction because the target has no such instruction. Generate shuffles
5130 // which repeat i16 and i8 several times until they fit in i32, and then can
5131 // be manipulated by target suported shuffles.
5132 MVT EltVT = SrcVT.getVectorElementType();
5133 if (EltVT == MVT::i8 || EltVT == MVT::i16)
5134 V1 = PromoteSplati8i16(V1, DAG, EltNo);
5136 // Recreate the 256-bit vector and place the same 128-bit vector
5137 // into the low and high part. This is necessary because we want
5138 // to use VPERM* to shuffle the vectors
5140 V1 = DAG.getNode(ISD::CONCAT_VECTORS, dl, SrcVT, V1, V1);
5143 return getLegalSplat(DAG, V1, EltNo);
5146 /// getShuffleVectorZeroOrUndef - Return a vector_shuffle of the specified
5147 /// vector of zero or undef vector. This produces a shuffle where the low
5148 /// element of V2 is swizzled into the zero/undef vector, landing at element
5149 /// Idx. This produces a shuffle mask like 4,1,2,3 (idx=0) or 0,1,2,4 (idx=3).
5150 static SDValue getShuffleVectorZeroOrUndef(SDValue V2, unsigned Idx,
5152 const X86Subtarget *Subtarget,
5153 SelectionDAG &DAG) {
5154 MVT VT = V2.getSimpleValueType();
5156 ? getZeroVector(VT, Subtarget, DAG, SDLoc(V2)) : DAG.getUNDEF(VT);
5157 unsigned NumElems = VT.getVectorNumElements();
5158 SmallVector<int, 16> MaskVec;
5159 for (unsigned i = 0; i != NumElems; ++i)
5160 // If this is the insertion idx, put the low elt of V2 here.
5161 MaskVec.push_back(i == Idx ? NumElems : i);
5162 return DAG.getVectorShuffle(VT, SDLoc(V2), V1, V2, &MaskVec[0]);
5165 /// getTargetShuffleMask - Calculates the shuffle mask corresponding to the
5166 /// target specific opcode. Returns true if the Mask could be calculated. Sets
5167 /// IsUnary to true if only uses one source. Note that this will set IsUnary for
5168 /// shuffles which use a single input multiple times, and in those cases it will
5169 /// adjust the mask to only have indices within that single input.
5170 static bool getTargetShuffleMask(SDNode *N, MVT VT,
5171 SmallVectorImpl<int> &Mask, bool &IsUnary) {
5172 unsigned NumElems = VT.getVectorNumElements();
5176 bool IsFakeUnary = false;
5177 switch(N->getOpcode()) {
5179 ImmN = N->getOperand(N->getNumOperands()-1);
5180 DecodeSHUFPMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
5181 IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1);
5183 case X86ISD::UNPCKH:
5184 DecodeUNPCKHMask(VT, Mask);
5185 IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1);
5187 case X86ISD::UNPCKL:
5188 DecodeUNPCKLMask(VT, Mask);
5189 IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1);
5191 case X86ISD::MOVHLPS:
5192 DecodeMOVHLPSMask(NumElems, Mask);
5193 IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1);
5195 case X86ISD::MOVLHPS:
5196 DecodeMOVLHPSMask(NumElems, Mask);
5197 IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1);
5199 case X86ISD::PALIGNR:
5200 ImmN = N->getOperand(N->getNumOperands()-1);
5201 DecodePALIGNRMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
5203 case X86ISD::PSHUFD:
5204 case X86ISD::VPERMILP:
5205 ImmN = N->getOperand(N->getNumOperands()-1);
5206 DecodePSHUFMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
5209 case X86ISD::PSHUFHW:
5210 ImmN = N->getOperand(N->getNumOperands()-1);
5211 DecodePSHUFHWMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
5214 case X86ISD::PSHUFLW:
5215 ImmN = N->getOperand(N->getNumOperands()-1);
5216 DecodePSHUFLWMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
5219 case X86ISD::PSHUFB: {
5221 SDValue MaskNode = N->getOperand(1);
5222 while (MaskNode->getOpcode() == ISD::BITCAST)
5223 MaskNode = MaskNode->getOperand(0);
5225 if (MaskNode->getOpcode() == ISD::BUILD_VECTOR) {
5226 // If we have a build-vector, then things are easy.
5227 EVT VT = MaskNode.getValueType();
5228 assert(VT.isVector() &&
5229 "Can't produce a non-vector with a build_vector!");
5230 if (!VT.isInteger())
5233 int NumBytesPerElement = VT.getVectorElementType().getSizeInBits() / 8;
5235 SmallVector<uint64_t, 32> RawMask;
5236 for (int i = 0, e = MaskNode->getNumOperands(); i < e; ++i) {
5237 auto *CN = dyn_cast<ConstantSDNode>(MaskNode->getOperand(i));
5240 APInt MaskElement = CN->getAPIntValue();
5242 // We now have to decode the element which could be any integer size and
5243 // extract each byte of it.
5244 for (int j = 0; j < NumBytesPerElement; ++j) {
5245 // Note that this is x86 and so always little endian: the low byte is
5246 // the first byte of the mask.
5247 RawMask.push_back(MaskElement.getLoBits(8).getZExtValue());
5248 MaskElement = MaskElement.lshr(8);
5251 DecodePSHUFBMask(RawMask, Mask);
5255 auto *MaskLoad = dyn_cast<LoadSDNode>(MaskNode);
5259 SDValue Ptr = MaskLoad->getBasePtr();
5260 if (Ptr->getOpcode() == X86ISD::Wrapper)
5261 Ptr = Ptr->getOperand(0);
5263 auto *MaskCP = dyn_cast<ConstantPoolSDNode>(Ptr);
5264 if (!MaskCP || MaskCP->isMachineConstantPoolEntry())
5267 if (auto *C = dyn_cast<ConstantDataSequential>(MaskCP->getConstVal())) {
5268 // FIXME: Support AVX-512 here.
5269 if (!C->getType()->isVectorTy() ||
5270 (C->getNumElements() != 16 && C->getNumElements() != 32))
5273 assert(C->getType()->isVectorTy() && "Expected a vector constant.");
5274 DecodePSHUFBMask(C, Mask);
5280 case X86ISD::VPERMI:
5281 ImmN = N->getOperand(N->getNumOperands()-1);
5282 DecodeVPERMMask(cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
5286 case X86ISD::MOVSD: {
5287 // The index 0 always comes from the first element of the second source,
5288 // this is why MOVSS and MOVSD are used in the first place. The other
5289 // elements come from the other positions of the first source vector
5290 Mask.push_back(NumElems);
5291 for (unsigned i = 1; i != NumElems; ++i) {
5296 case X86ISD::VPERM2X128:
5297 ImmN = N->getOperand(N->getNumOperands()-1);
5298 DecodeVPERM2X128Mask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
5299 if (Mask.empty()) return false;
5301 case X86ISD::MOVDDUP:
5302 case X86ISD::MOVLHPD:
5303 case X86ISD::MOVLPD:
5304 case X86ISD::MOVLPS:
5305 case X86ISD::MOVSHDUP:
5306 case X86ISD::MOVSLDUP:
5307 // Not yet implemented
5309 default: llvm_unreachable("unknown target shuffle node");
5312 // If we have a fake unary shuffle, the shuffle mask is spread across two
5313 // inputs that are actually the same node. Re-map the mask to always point
5314 // into the first input.
5317 if (M >= (int)Mask.size())
5323 /// getShuffleScalarElt - Returns the scalar element that will make up the ith
5324 /// element of the result of the vector shuffle.
5325 static SDValue getShuffleScalarElt(SDNode *N, unsigned Index, SelectionDAG &DAG,
5328 return SDValue(); // Limit search depth.
5330 SDValue V = SDValue(N, 0);
5331 EVT VT = V.getValueType();
5332 unsigned Opcode = V.getOpcode();
5334 // Recurse into ISD::VECTOR_SHUFFLE node to find scalars.
5335 if (const ShuffleVectorSDNode *SV = dyn_cast<ShuffleVectorSDNode>(N)) {
5336 int Elt = SV->getMaskElt(Index);
5339 return DAG.getUNDEF(VT.getVectorElementType());
5341 unsigned NumElems = VT.getVectorNumElements();
5342 SDValue NewV = (Elt < (int)NumElems) ? SV->getOperand(0)
5343 : SV->getOperand(1);
5344 return getShuffleScalarElt(NewV.getNode(), Elt % NumElems, DAG, Depth+1);
5347 // Recurse into target specific vector shuffles to find scalars.
5348 if (isTargetShuffle(Opcode)) {
5349 MVT ShufVT = V.getSimpleValueType();
5350 unsigned NumElems = ShufVT.getVectorNumElements();
5351 SmallVector<int, 16> ShuffleMask;
5354 if (!getTargetShuffleMask(N, ShufVT, ShuffleMask, IsUnary))
5357 int Elt = ShuffleMask[Index];
5359 return DAG.getUNDEF(ShufVT.getVectorElementType());
5361 SDValue NewV = (Elt < (int)NumElems) ? N->getOperand(0)
5363 return getShuffleScalarElt(NewV.getNode(), Elt % NumElems, DAG,
5367 // Actual nodes that may contain scalar elements
5368 if (Opcode == ISD::BITCAST) {
5369 V = V.getOperand(0);
5370 EVT SrcVT = V.getValueType();
5371 unsigned NumElems = VT.getVectorNumElements();
5373 if (!SrcVT.isVector() || SrcVT.getVectorNumElements() != NumElems)
5377 if (V.getOpcode() == ISD::SCALAR_TO_VECTOR)
5378 return (Index == 0) ? V.getOperand(0)
5379 : DAG.getUNDEF(VT.getVectorElementType());
5381 if (V.getOpcode() == ISD::BUILD_VECTOR)
5382 return V.getOperand(Index);
5387 /// getNumOfConsecutiveZeros - Return the number of elements of a vector
5388 /// shuffle operation which come from a consecutively from a zero. The
5389 /// search can start in two different directions, from left or right.
5390 /// We count undefs as zeros until PreferredNum is reached.
5391 static unsigned getNumOfConsecutiveZeros(ShuffleVectorSDNode *SVOp,
5392 unsigned NumElems, bool ZerosFromLeft,
5394 unsigned PreferredNum = -1U) {
5395 unsigned NumZeros = 0;
5396 for (unsigned i = 0; i != NumElems; ++i) {
5397 unsigned Index = ZerosFromLeft ? i : NumElems - i - 1;
5398 SDValue Elt = getShuffleScalarElt(SVOp, Index, DAG, 0);
5402 if (X86::isZeroNode(Elt))
5404 else if (Elt.getOpcode() == ISD::UNDEF) // Undef as zero up to PreferredNum.
5405 NumZeros = std::min(NumZeros + 1, PreferredNum);
5413 /// isShuffleMaskConsecutive - Check if the shuffle mask indicies [MaskI, MaskE)
5414 /// correspond consecutively to elements from one of the vector operands,
5415 /// starting from its index OpIdx. Also tell OpNum which source vector operand.
5417 bool isShuffleMaskConsecutive(ShuffleVectorSDNode *SVOp,
5418 unsigned MaskI, unsigned MaskE, unsigned OpIdx,
5419 unsigned NumElems, unsigned &OpNum) {
5420 bool SeenV1 = false;
5421 bool SeenV2 = false;
5423 for (unsigned i = MaskI; i != MaskE; ++i, ++OpIdx) {
5424 int Idx = SVOp->getMaskElt(i);
5425 // Ignore undef indicies
5429 if (Idx < (int)NumElems)
5434 // Only accept consecutive elements from the same vector
5435 if ((Idx % NumElems != OpIdx) || (SeenV1 && SeenV2))
5439 OpNum = SeenV1 ? 0 : 1;
5443 /// isVectorShiftRight - Returns true if the shuffle can be implemented as a
5444 /// logical left shift of a vector.
5445 static bool isVectorShiftRight(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
5446 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
5448 SVOp->getSimpleValueType(0).getVectorNumElements();
5449 unsigned NumZeros = getNumOfConsecutiveZeros(
5450 SVOp, NumElems, false /* check zeros from right */, DAG,
5451 SVOp->getMaskElt(0));
5457 // Considering the elements in the mask that are not consecutive zeros,
5458 // check if they consecutively come from only one of the source vectors.
5460 // V1 = {X, A, B, C} 0
5462 // vector_shuffle V1, V2 <1, 2, 3, X>
5464 if (!isShuffleMaskConsecutive(SVOp,
5465 0, // Mask Start Index
5466 NumElems-NumZeros, // Mask End Index(exclusive)
5467 NumZeros, // Where to start looking in the src vector
5468 NumElems, // Number of elements in vector
5469 OpSrc)) // Which source operand ?
5474 ShVal = SVOp->getOperand(OpSrc);
5478 /// isVectorShiftLeft - Returns true if the shuffle can be implemented as a
5479 /// logical left shift of a vector.
5480 static bool isVectorShiftLeft(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
5481 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
5483 SVOp->getSimpleValueType(0).getVectorNumElements();
5484 unsigned NumZeros = getNumOfConsecutiveZeros(
5485 SVOp, NumElems, true /* check zeros from left */, DAG,
5486 NumElems - SVOp->getMaskElt(NumElems - 1) - 1);
5492 // Considering the elements in the mask that are not consecutive zeros,
5493 // check if they consecutively come from only one of the source vectors.
5495 // 0 { A, B, X, X } = V2
5497 // vector_shuffle V1, V2 <X, X, 4, 5>
5499 if (!isShuffleMaskConsecutive(SVOp,
5500 NumZeros, // Mask Start Index
5501 NumElems, // Mask End Index(exclusive)
5502 0, // Where to start looking in the src vector
5503 NumElems, // Number of elements in vector
5504 OpSrc)) // Which source operand ?
5509 ShVal = SVOp->getOperand(OpSrc);
5513 /// isVectorShift - Returns true if the shuffle can be implemented as a
5514 /// logical left or right shift of a vector.
5515 static bool isVectorShift(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
5516 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
5517 // Although the logic below support any bitwidth size, there are no
5518 // shift instructions which handle more than 128-bit vectors.
5519 if (!SVOp->getSimpleValueType(0).is128BitVector())
5522 if (isVectorShiftLeft(SVOp, DAG, isLeft, ShVal, ShAmt) ||
5523 isVectorShiftRight(SVOp, DAG, isLeft, ShVal, ShAmt))
5529 /// LowerBuildVectorv16i8 - Custom lower build_vector of v16i8.
5531 static SDValue LowerBuildVectorv16i8(SDValue Op, unsigned NonZeros,
5532 unsigned NumNonZero, unsigned NumZero,
5534 const X86Subtarget* Subtarget,
5535 const TargetLowering &TLI) {
5542 for (unsigned i = 0; i < 16; ++i) {
5543 bool ThisIsNonZero = (NonZeros & (1 << i)) != 0;
5544 if (ThisIsNonZero && First) {
5546 V = getZeroVector(MVT::v8i16, Subtarget, DAG, dl);
5548 V = DAG.getUNDEF(MVT::v8i16);
5553 SDValue ThisElt, LastElt;
5554 bool LastIsNonZero = (NonZeros & (1 << (i-1))) != 0;
5555 if (LastIsNonZero) {
5556 LastElt = DAG.getNode(ISD::ZERO_EXTEND, dl,
5557 MVT::i16, Op.getOperand(i-1));
5559 if (ThisIsNonZero) {
5560 ThisElt = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i16, Op.getOperand(i));
5561 ThisElt = DAG.getNode(ISD::SHL, dl, MVT::i16,
5562 ThisElt, DAG.getConstant(8, MVT::i8));
5564 ThisElt = DAG.getNode(ISD::OR, dl, MVT::i16, ThisElt, LastElt);
5568 if (ThisElt.getNode())
5569 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, V, ThisElt,
5570 DAG.getIntPtrConstant(i/2));
5574 return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V);
5577 /// LowerBuildVectorv8i16 - Custom lower build_vector of v8i16.
5579 static SDValue LowerBuildVectorv8i16(SDValue Op, unsigned NonZeros,
5580 unsigned NumNonZero, unsigned NumZero,
5582 const X86Subtarget* Subtarget,
5583 const TargetLowering &TLI) {
5590 for (unsigned i = 0; i < 8; ++i) {
5591 bool isNonZero = (NonZeros & (1 << i)) != 0;
5595 V = getZeroVector(MVT::v8i16, Subtarget, DAG, dl);
5597 V = DAG.getUNDEF(MVT::v8i16);
5600 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl,
5601 MVT::v8i16, V, Op.getOperand(i),
5602 DAG.getIntPtrConstant(i));
5609 /// LowerBuildVectorv4x32 - Custom lower build_vector of v4i32 or v4f32.
5610 static SDValue LowerBuildVectorv4x32(SDValue Op, unsigned NumElems,
5611 unsigned NonZeros, unsigned NumNonZero,
5612 unsigned NumZero, SelectionDAG &DAG,
5613 const X86Subtarget *Subtarget,
5614 const TargetLowering &TLI) {
5615 // We know there's at least one non-zero element
5616 unsigned FirstNonZeroIdx = 0;
5617 SDValue FirstNonZero = Op->getOperand(FirstNonZeroIdx);
5618 while (FirstNonZero.getOpcode() == ISD::UNDEF ||
5619 X86::isZeroNode(FirstNonZero)) {
5621 FirstNonZero = Op->getOperand(FirstNonZeroIdx);
5624 if (FirstNonZero.getOpcode() != ISD::EXTRACT_VECTOR_ELT ||
5625 !isa<ConstantSDNode>(FirstNonZero.getOperand(1)))
5628 SDValue V = FirstNonZero.getOperand(0);
5629 MVT VVT = V.getSimpleValueType();
5630 if (!Subtarget->hasSSE41() || (VVT != MVT::v4f32 && VVT != MVT::v4i32))
5633 unsigned FirstNonZeroDst =
5634 cast<ConstantSDNode>(FirstNonZero.getOperand(1))->getZExtValue();
5635 unsigned CorrectIdx = FirstNonZeroDst == FirstNonZeroIdx;
5636 unsigned IncorrectIdx = CorrectIdx ? -1U : FirstNonZeroIdx;
5637 unsigned IncorrectDst = CorrectIdx ? -1U : FirstNonZeroDst;
5639 for (unsigned Idx = FirstNonZeroIdx + 1; Idx < NumElems; ++Idx) {
5640 SDValue Elem = Op.getOperand(Idx);
5641 if (Elem.getOpcode() == ISD::UNDEF || X86::isZeroNode(Elem))
5644 // TODO: What else can be here? Deal with it.
5645 if (Elem.getOpcode() != ISD::EXTRACT_VECTOR_ELT)
5648 // TODO: Some optimizations are still possible here
5649 // ex: Getting one element from a vector, and the rest from another.
5650 if (Elem.getOperand(0) != V)
5653 unsigned Dst = cast<ConstantSDNode>(Elem.getOperand(1))->getZExtValue();
5656 else if (IncorrectIdx == -1U) {
5660 // There was already one element with an incorrect index.
5661 // We can't optimize this case to an insertps.
5665 if (NumNonZero == CorrectIdx || NumNonZero == CorrectIdx + 1) {
5667 EVT VT = Op.getSimpleValueType();
5668 unsigned ElementMoveMask = 0;
5669 if (IncorrectIdx == -1U)
5670 ElementMoveMask = FirstNonZeroIdx << 6 | FirstNonZeroIdx << 4;
5672 ElementMoveMask = IncorrectDst << 6 | IncorrectIdx << 4;
5674 SDValue InsertpsMask =
5675 DAG.getIntPtrConstant(ElementMoveMask | (~NonZeros & 0xf));
5676 return DAG.getNode(X86ISD::INSERTPS, dl, VT, V, V, InsertpsMask);
5682 /// getVShift - Return a vector logical shift node.
5684 static SDValue getVShift(bool isLeft, EVT VT, SDValue SrcOp,
5685 unsigned NumBits, SelectionDAG &DAG,
5686 const TargetLowering &TLI, SDLoc dl) {
5687 assert(VT.is128BitVector() && "Unknown type for VShift");
5688 EVT ShVT = MVT::v2i64;
5689 unsigned Opc = isLeft ? X86ISD::VSHLDQ : X86ISD::VSRLDQ;
5690 SrcOp = DAG.getNode(ISD::BITCAST, dl, ShVT, SrcOp);
5691 return DAG.getNode(ISD::BITCAST, dl, VT,
5692 DAG.getNode(Opc, dl, ShVT, SrcOp,
5693 DAG.getConstant(NumBits,
5694 TLI.getScalarShiftAmountTy(SrcOp.getValueType()))));
5698 LowerAsSplatVectorLoad(SDValue SrcOp, MVT VT, SDLoc dl, SelectionDAG &DAG) {
5700 // Check if the scalar load can be widened into a vector load. And if
5701 // the address is "base + cst" see if the cst can be "absorbed" into
5702 // the shuffle mask.
5703 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(SrcOp)) {
5704 SDValue Ptr = LD->getBasePtr();
5705 if (!ISD::isNormalLoad(LD) || LD->isVolatile())
5707 EVT PVT = LD->getValueType(0);
5708 if (PVT != MVT::i32 && PVT != MVT::f32)
5713 if (FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr)) {
5714 FI = FINode->getIndex();
5716 } else if (DAG.isBaseWithConstantOffset(Ptr) &&
5717 isa<FrameIndexSDNode>(Ptr.getOperand(0))) {
5718 FI = cast<FrameIndexSDNode>(Ptr.getOperand(0))->getIndex();
5719 Offset = Ptr.getConstantOperandVal(1);
5720 Ptr = Ptr.getOperand(0);
5725 // FIXME: 256-bit vector instructions don't require a strict alignment,
5726 // improve this code to support it better.
5727 unsigned RequiredAlign = VT.getSizeInBits()/8;
5728 SDValue Chain = LD->getChain();
5729 // Make sure the stack object alignment is at least 16 or 32.
5730 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
5731 if (DAG.InferPtrAlignment(Ptr) < RequiredAlign) {
5732 if (MFI->isFixedObjectIndex(FI)) {
5733 // Can't change the alignment. FIXME: It's possible to compute
5734 // the exact stack offset and reference FI + adjust offset instead.
5735 // If someone *really* cares about this. That's the way to implement it.
5738 MFI->setObjectAlignment(FI, RequiredAlign);
5742 // (Offset % 16 or 32) must be multiple of 4. Then address is then
5743 // Ptr + (Offset & ~15).
5746 if ((Offset % RequiredAlign) & 3)
5748 int64_t StartOffset = Offset & ~(RequiredAlign-1);
5750 Ptr = DAG.getNode(ISD::ADD, SDLoc(Ptr), Ptr.getValueType(),
5751 Ptr,DAG.getConstant(StartOffset, Ptr.getValueType()));
5753 int EltNo = (Offset - StartOffset) >> 2;
5754 unsigned NumElems = VT.getVectorNumElements();
5756 EVT NVT = EVT::getVectorVT(*DAG.getContext(), PVT, NumElems);
5757 SDValue V1 = DAG.getLoad(NVT, dl, Chain, Ptr,
5758 LD->getPointerInfo().getWithOffset(StartOffset),
5759 false, false, false, 0);
5761 SmallVector<int, 8> Mask;
5762 for (unsigned i = 0; i != NumElems; ++i)
5763 Mask.push_back(EltNo);
5765 return DAG.getVectorShuffle(NVT, dl, V1, DAG.getUNDEF(NVT), &Mask[0]);
5771 /// EltsFromConsecutiveLoads - Given the initializing elements 'Elts' of a
5772 /// vector of type 'VT', see if the elements can be replaced by a single large
5773 /// load which has the same value as a build_vector whose operands are 'elts'.
5775 /// Example: <load i32 *a, load i32 *a+4, undef, undef> -> zextload a
5777 /// FIXME: we'd also like to handle the case where the last elements are zero
5778 /// rather than undef via VZEXT_LOAD, but we do not detect that case today.
5779 /// There's even a handy isZeroNode for that purpose.
5780 static SDValue EltsFromConsecutiveLoads(EVT VT, SmallVectorImpl<SDValue> &Elts,
5781 SDLoc &DL, SelectionDAG &DAG,
5782 bool isAfterLegalize) {
5783 EVT EltVT = VT.getVectorElementType();
5784 unsigned NumElems = Elts.size();
5786 LoadSDNode *LDBase = nullptr;
5787 unsigned LastLoadedElt = -1U;
5789 // For each element in the initializer, see if we've found a load or an undef.
5790 // If we don't find an initial load element, or later load elements are
5791 // non-consecutive, bail out.
5792 for (unsigned i = 0; i < NumElems; ++i) {
5793 SDValue Elt = Elts[i];
5795 if (!Elt.getNode() ||
5796 (Elt.getOpcode() != ISD::UNDEF && !ISD::isNON_EXTLoad(Elt.getNode())))
5799 if (Elt.getNode()->getOpcode() == ISD::UNDEF)
5801 LDBase = cast<LoadSDNode>(Elt.getNode());
5805 if (Elt.getOpcode() == ISD::UNDEF)
5808 LoadSDNode *LD = cast<LoadSDNode>(Elt);
5809 if (!DAG.isConsecutiveLoad(LD, LDBase, EltVT.getSizeInBits()/8, i))
5814 // If we have found an entire vector of loads and undefs, then return a large
5815 // load of the entire vector width starting at the base pointer. If we found
5816 // consecutive loads for the low half, generate a vzext_load node.
5817 if (LastLoadedElt == NumElems - 1) {
5819 if (isAfterLegalize &&
5820 !DAG.getTargetLoweringInfo().isOperationLegal(ISD::LOAD, VT))
5823 SDValue NewLd = SDValue();
5825 if (DAG.InferPtrAlignment(LDBase->getBasePtr()) >= 16)
5826 NewLd = DAG.getLoad(VT, DL, LDBase->getChain(), LDBase->getBasePtr(),
5827 LDBase->getPointerInfo(),
5828 LDBase->isVolatile(), LDBase->isNonTemporal(),
5829 LDBase->isInvariant(), 0);
5830 NewLd = DAG.getLoad(VT, DL, LDBase->getChain(), LDBase->getBasePtr(),
5831 LDBase->getPointerInfo(),
5832 LDBase->isVolatile(), LDBase->isNonTemporal(),
5833 LDBase->isInvariant(), LDBase->getAlignment());
5835 if (LDBase->hasAnyUseOfValue(1)) {
5836 SDValue NewChain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
5838 SDValue(NewLd.getNode(), 1));
5839 DAG.ReplaceAllUsesOfValueWith(SDValue(LDBase, 1), NewChain);
5840 DAG.UpdateNodeOperands(NewChain.getNode(), SDValue(LDBase, 1),
5841 SDValue(NewLd.getNode(), 1));
5846 if (NumElems == 4 && LastLoadedElt == 1 &&
5847 DAG.getTargetLoweringInfo().isTypeLegal(MVT::v2i64)) {
5848 SDVTList Tys = DAG.getVTList(MVT::v2i64, MVT::Other);
5849 SDValue Ops[] = { LDBase->getChain(), LDBase->getBasePtr() };
5851 DAG.getMemIntrinsicNode(X86ISD::VZEXT_LOAD, DL, Tys, Ops, MVT::i64,
5852 LDBase->getPointerInfo(),
5853 LDBase->getAlignment(),
5854 false/*isVolatile*/, true/*ReadMem*/,
5857 // Make sure the newly-created LOAD is in the same position as LDBase in
5858 // terms of dependency. We create a TokenFactor for LDBase and ResNode, and
5859 // update uses of LDBase's output chain to use the TokenFactor.
5860 if (LDBase->hasAnyUseOfValue(1)) {
5861 SDValue NewChain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
5862 SDValue(LDBase, 1), SDValue(ResNode.getNode(), 1));
5863 DAG.ReplaceAllUsesOfValueWith(SDValue(LDBase, 1), NewChain);
5864 DAG.UpdateNodeOperands(NewChain.getNode(), SDValue(LDBase, 1),
5865 SDValue(ResNode.getNode(), 1));
5868 return DAG.getNode(ISD::BITCAST, DL, VT, ResNode);
5873 /// LowerVectorBroadcast - Attempt to use the vbroadcast instruction
5874 /// to generate a splat value for the following cases:
5875 /// 1. A splat BUILD_VECTOR which uses a single scalar load, or a constant.
5876 /// 2. A splat shuffle which uses a scalar_to_vector node which comes from
5877 /// a scalar load, or a constant.
5878 /// The VBROADCAST node is returned when a pattern is found,
5879 /// or SDValue() otherwise.
5880 static SDValue LowerVectorBroadcast(SDValue Op, const X86Subtarget* Subtarget,
5881 SelectionDAG &DAG) {
5882 if (!Subtarget->hasFp256())
5885 MVT VT = Op.getSimpleValueType();
5888 assert((VT.is128BitVector() || VT.is256BitVector() || VT.is512BitVector()) &&
5889 "Unsupported vector type for broadcast.");
5894 switch (Op.getOpcode()) {
5896 // Unknown pattern found.
5899 case ISD::BUILD_VECTOR: {
5900 auto *BVOp = cast<BuildVectorSDNode>(Op.getNode());
5901 BitVector UndefElements;
5902 SDValue Splat = BVOp->getSplatValue(&UndefElements);
5904 // We need a splat of a single value to use broadcast, and it doesn't
5905 // make any sense if the value is only in one element of the vector.
5906 if (!Splat || (VT.getVectorNumElements() - UndefElements.count()) <= 1)
5910 ConstSplatVal = (Ld.getOpcode() == ISD::Constant ||
5911 Ld.getOpcode() == ISD::ConstantFP);
5913 // Make sure that all of the users of a non-constant load are from the
5914 // BUILD_VECTOR node.
5915 if (!ConstSplatVal && !BVOp->isOnlyUserOf(Ld.getNode()))
5920 case ISD::VECTOR_SHUFFLE: {
5921 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
5923 // Shuffles must have a splat mask where the first element is
5925 if ((!SVOp->isSplat()) || SVOp->getMaskElt(0) != 0)
5928 SDValue Sc = Op.getOperand(0);
5929 if (Sc.getOpcode() != ISD::SCALAR_TO_VECTOR &&
5930 Sc.getOpcode() != ISD::BUILD_VECTOR) {
5932 if (!Subtarget->hasInt256())
5935 // Use the register form of the broadcast instruction available on AVX2.
5936 if (VT.getSizeInBits() >= 256)
5937 Sc = Extract128BitVector(Sc, 0, DAG, dl);
5938 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Sc);
5941 Ld = Sc.getOperand(0);
5942 ConstSplatVal = (Ld.getOpcode() == ISD::Constant ||
5943 Ld.getOpcode() == ISD::ConstantFP);
5945 // The scalar_to_vector node and the suspected
5946 // load node must have exactly one user.
5947 // Constants may have multiple users.
5949 // AVX-512 has register version of the broadcast
5950 bool hasRegVer = Subtarget->hasAVX512() && VT.is512BitVector() &&
5951 Ld.getValueType().getSizeInBits() >= 32;
5952 if (!ConstSplatVal && ((!Sc.hasOneUse() || !Ld.hasOneUse()) &&
5959 bool IsGE256 = (VT.getSizeInBits() >= 256);
5961 // Handle the broadcasting a single constant scalar from the constant pool
5962 // into a vector. On Sandybridge it is still better to load a constant vector
5963 // from the constant pool and not to broadcast it from a scalar.
5964 if (ConstSplatVal && Subtarget->hasInt256()) {
5965 EVT CVT = Ld.getValueType();
5966 assert(!CVT.isVector() && "Must not broadcast a vector type");
5967 unsigned ScalarSize = CVT.getSizeInBits();
5969 if (ScalarSize == 32 || (IsGE256 && ScalarSize == 64)) {
5970 const Constant *C = nullptr;
5971 if (ConstantSDNode *CI = dyn_cast<ConstantSDNode>(Ld))
5972 C = CI->getConstantIntValue();
5973 else if (ConstantFPSDNode *CF = dyn_cast<ConstantFPSDNode>(Ld))
5974 C = CF->getConstantFPValue();
5976 assert(C && "Invalid constant type");
5978 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
5979 SDValue CP = DAG.getConstantPool(C, TLI.getPointerTy());
5980 unsigned Alignment = cast<ConstantPoolSDNode>(CP)->getAlignment();
5981 Ld = DAG.getLoad(CVT, dl, DAG.getEntryNode(), CP,
5982 MachinePointerInfo::getConstantPool(),
5983 false, false, false, Alignment);
5985 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld);
5989 bool IsLoad = ISD::isNormalLoad(Ld.getNode());
5990 unsigned ScalarSize = Ld.getValueType().getSizeInBits();
5992 // Handle AVX2 in-register broadcasts.
5993 if (!IsLoad && Subtarget->hasInt256() &&
5994 (ScalarSize == 32 || (IsGE256 && ScalarSize == 64)))
5995 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld);
5997 // The scalar source must be a normal load.
6001 if (ScalarSize == 32 || (IsGE256 && ScalarSize == 64))
6002 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld);
6004 // The integer check is needed for the 64-bit into 128-bit so it doesn't match
6005 // double since there is no vbroadcastsd xmm
6006 if (Subtarget->hasInt256() && Ld.getValueType().isInteger()) {
6007 if (ScalarSize == 8 || ScalarSize == 16 || ScalarSize == 64)
6008 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld);
6011 // Unsupported broadcast.
6015 /// \brief For an EXTRACT_VECTOR_ELT with a constant index return the real
6016 /// underlying vector and index.
6018 /// Modifies \p ExtractedFromVec to the real vector and returns the real
6020 static int getUnderlyingExtractedFromVec(SDValue &ExtractedFromVec,
6022 int Idx = cast<ConstantSDNode>(ExtIdx)->getZExtValue();
6023 if (!isa<ShuffleVectorSDNode>(ExtractedFromVec))
6026 // For 256-bit vectors, LowerEXTRACT_VECTOR_ELT_SSE4 may have already
6028 // (extract_vector_elt (v8f32 %vreg1), Constant<6>)
6030 // (extract_vector_elt (vector_shuffle<2,u,u,u>
6031 // (extract_subvector (v8f32 %vreg0), Constant<4>),
6034 // In this case the vector is the extract_subvector expression and the index
6035 // is 2, as specified by the shuffle.
6036 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(ExtractedFromVec);
6037 SDValue ShuffleVec = SVOp->getOperand(0);
6038 MVT ShuffleVecVT = ShuffleVec.getSimpleValueType();
6039 assert(ShuffleVecVT.getVectorElementType() ==
6040 ExtractedFromVec.getSimpleValueType().getVectorElementType());
6042 int ShuffleIdx = SVOp->getMaskElt(Idx);
6043 if (isUndefOrInRange(ShuffleIdx, 0, ShuffleVecVT.getVectorNumElements())) {
6044 ExtractedFromVec = ShuffleVec;
6050 static SDValue buildFromShuffleMostly(SDValue Op, SelectionDAG &DAG) {
6051 MVT VT = Op.getSimpleValueType();
6053 // Skip if insert_vec_elt is not supported.
6054 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
6055 if (!TLI.isOperationLegalOrCustom(ISD::INSERT_VECTOR_ELT, VT))
6059 unsigned NumElems = Op.getNumOperands();
6063 SmallVector<unsigned, 4> InsertIndices;
6064 SmallVector<int, 8> Mask(NumElems, -1);
6066 for (unsigned i = 0; i != NumElems; ++i) {
6067 unsigned Opc = Op.getOperand(i).getOpcode();
6069 if (Opc == ISD::UNDEF)
6072 if (Opc != ISD::EXTRACT_VECTOR_ELT) {
6073 // Quit if more than 1 elements need inserting.
6074 if (InsertIndices.size() > 1)
6077 InsertIndices.push_back(i);
6081 SDValue ExtractedFromVec = Op.getOperand(i).getOperand(0);
6082 SDValue ExtIdx = Op.getOperand(i).getOperand(1);
6083 // Quit if non-constant index.
6084 if (!isa<ConstantSDNode>(ExtIdx))
6086 int Idx = getUnderlyingExtractedFromVec(ExtractedFromVec, ExtIdx);
6088 // Quit if extracted from vector of different type.
6089 if (ExtractedFromVec.getValueType() != VT)
6092 if (!VecIn1.getNode())
6093 VecIn1 = ExtractedFromVec;
6094 else if (VecIn1 != ExtractedFromVec) {
6095 if (!VecIn2.getNode())
6096 VecIn2 = ExtractedFromVec;
6097 else if (VecIn2 != ExtractedFromVec)
6098 // Quit if more than 2 vectors to shuffle
6102 if (ExtractedFromVec == VecIn1)
6104 else if (ExtractedFromVec == VecIn2)
6105 Mask[i] = Idx + NumElems;
6108 if (!VecIn1.getNode())
6111 VecIn2 = VecIn2.getNode() ? VecIn2 : DAG.getUNDEF(VT);
6112 SDValue NV = DAG.getVectorShuffle(VT, DL, VecIn1, VecIn2, &Mask[0]);
6113 for (unsigned i = 0, e = InsertIndices.size(); i != e; ++i) {
6114 unsigned Idx = InsertIndices[i];
6115 NV = DAG.getNode(ISD::INSERT_VECTOR_ELT, DL, VT, NV, Op.getOperand(Idx),
6116 DAG.getIntPtrConstant(Idx));
6122 // Lower BUILD_VECTOR operation for v8i1 and v16i1 types.
6124 X86TargetLowering::LowerBUILD_VECTORvXi1(SDValue Op, SelectionDAG &DAG) const {
6126 MVT VT = Op.getSimpleValueType();
6127 assert((VT.getVectorElementType() == MVT::i1) && (VT.getSizeInBits() <= 16) &&
6128 "Unexpected type in LowerBUILD_VECTORvXi1!");
6131 if (ISD::isBuildVectorAllZeros(Op.getNode())) {
6132 SDValue Cst = DAG.getTargetConstant(0, MVT::i1);
6133 SmallVector<SDValue, 16> Ops(VT.getVectorNumElements(), Cst);
6134 return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, Ops);
6137 if (ISD::isBuildVectorAllOnes(Op.getNode())) {
6138 SDValue Cst = DAG.getTargetConstant(1, MVT::i1);
6139 SmallVector<SDValue, 16> Ops(VT.getVectorNumElements(), Cst);
6140 return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, Ops);
6143 bool AllContants = true;
6144 uint64_t Immediate = 0;
6145 int NonConstIdx = -1;
6146 bool IsSplat = true;
6147 unsigned NumNonConsts = 0;
6148 unsigned NumConsts = 0;
6149 for (unsigned idx = 0, e = Op.getNumOperands(); idx < e; ++idx) {
6150 SDValue In = Op.getOperand(idx);
6151 if (In.getOpcode() == ISD::UNDEF)
6153 if (!isa<ConstantSDNode>(In)) {
6154 AllContants = false;
6160 if (cast<ConstantSDNode>(In)->getZExtValue())
6161 Immediate |= (1ULL << idx);
6163 if (In != Op.getOperand(0))
6168 SDValue FullMask = DAG.getNode(ISD::BITCAST, dl, MVT::v16i1,
6169 DAG.getConstant(Immediate, MVT::i16));
6170 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT, FullMask,
6171 DAG.getIntPtrConstant(0));
6174 if (NumNonConsts == 1 && NonConstIdx != 0) {
6177 SDValue VecAsImm = DAG.getConstant(Immediate,
6178 MVT::getIntegerVT(VT.getSizeInBits()));
6179 DstVec = DAG.getNode(ISD::BITCAST, dl, VT, VecAsImm);
6182 DstVec = DAG.getUNDEF(VT);
6183 return DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, DstVec,
6184 Op.getOperand(NonConstIdx),
6185 DAG.getIntPtrConstant(NonConstIdx));
6187 if (!IsSplat && (NonConstIdx != 0))
6188 llvm_unreachable("Unsupported BUILD_VECTOR operation");
6189 MVT SelectVT = (VT == MVT::v16i1)? MVT::i16 : MVT::i8;
6192 Select = DAG.getNode(ISD::SELECT, dl, SelectVT, Op.getOperand(0),
6193 DAG.getConstant(-1, SelectVT),
6194 DAG.getConstant(0, SelectVT));
6196 Select = DAG.getNode(ISD::SELECT, dl, SelectVT, Op.getOperand(0),
6197 DAG.getConstant((Immediate | 1), SelectVT),
6198 DAG.getConstant(Immediate, SelectVT));
6199 return DAG.getNode(ISD::BITCAST, dl, VT, Select);
6202 /// \brief Return true if \p N implements a horizontal binop and return the
6203 /// operands for the horizontal binop into V0 and V1.
6205 /// This is a helper function of PerformBUILD_VECTORCombine.
6206 /// This function checks that the build_vector \p N in input implements a
6207 /// horizontal operation. Parameter \p Opcode defines the kind of horizontal
6208 /// operation to match.
6209 /// For example, if \p Opcode is equal to ISD::ADD, then this function
6210 /// checks if \p N implements a horizontal arithmetic add; if instead \p Opcode
6211 /// is equal to ISD::SUB, then this function checks if this is a horizontal
6214 /// This function only analyzes elements of \p N whose indices are
6215 /// in range [BaseIdx, LastIdx).
6216 static bool isHorizontalBinOp(const BuildVectorSDNode *N, unsigned Opcode,
6218 unsigned BaseIdx, unsigned LastIdx,
6219 SDValue &V0, SDValue &V1) {
6220 EVT VT = N->getValueType(0);
6222 assert(BaseIdx * 2 <= LastIdx && "Invalid Indices in input!");
6223 assert(VT.isVector() && VT.getVectorNumElements() >= LastIdx &&
6224 "Invalid Vector in input!");
6226 bool IsCommutable = (Opcode == ISD::ADD || Opcode == ISD::FADD);
6227 bool CanFold = true;
6228 unsigned ExpectedVExtractIdx = BaseIdx;
6229 unsigned NumElts = LastIdx - BaseIdx;
6230 V0 = DAG.getUNDEF(VT);
6231 V1 = DAG.getUNDEF(VT);
6233 // Check if N implements a horizontal binop.
6234 for (unsigned i = 0, e = NumElts; i != e && CanFold; ++i) {
6235 SDValue Op = N->getOperand(i + BaseIdx);
6238 if (Op->getOpcode() == ISD::UNDEF) {
6239 // Update the expected vector extract index.
6240 if (i * 2 == NumElts)
6241 ExpectedVExtractIdx = BaseIdx;
6242 ExpectedVExtractIdx += 2;
6246 CanFold = Op->getOpcode() == Opcode && Op->hasOneUse();
6251 SDValue Op0 = Op.getOperand(0);
6252 SDValue Op1 = Op.getOperand(1);
6254 // Try to match the following pattern:
6255 // (BINOP (extract_vector_elt A, I), (extract_vector_elt A, I+1))
6256 CanFold = (Op0.getOpcode() == ISD::EXTRACT_VECTOR_ELT &&
6257 Op1.getOpcode() == ISD::EXTRACT_VECTOR_ELT &&
6258 Op0.getOperand(0) == Op1.getOperand(0) &&
6259 isa<ConstantSDNode>(Op0.getOperand(1)) &&
6260 isa<ConstantSDNode>(Op1.getOperand(1)));
6264 unsigned I0 = cast<ConstantSDNode>(Op0.getOperand(1))->getZExtValue();
6265 unsigned I1 = cast<ConstantSDNode>(Op1.getOperand(1))->getZExtValue();
6267 if (i * 2 < NumElts) {
6268 if (V0.getOpcode() == ISD::UNDEF)
6269 V0 = Op0.getOperand(0);
6271 if (V1.getOpcode() == ISD::UNDEF)
6272 V1 = Op0.getOperand(0);
6273 if (i * 2 == NumElts)
6274 ExpectedVExtractIdx = BaseIdx;
6277 SDValue Expected = (i * 2 < NumElts) ? V0 : V1;
6278 if (I0 == ExpectedVExtractIdx)
6279 CanFold = I1 == I0 + 1 && Op0.getOperand(0) == Expected;
6280 else if (IsCommutable && I1 == ExpectedVExtractIdx) {
6281 // Try to match the following dag sequence:
6282 // (BINOP (extract_vector_elt A, I+1), (extract_vector_elt A, I))
6283 CanFold = I0 == I1 + 1 && Op1.getOperand(0) == Expected;
6287 ExpectedVExtractIdx += 2;
6293 /// \brief Emit a sequence of two 128-bit horizontal add/sub followed by
6294 /// a concat_vector.
6296 /// This is a helper function of PerformBUILD_VECTORCombine.
6297 /// This function expects two 256-bit vectors called V0 and V1.
6298 /// At first, each vector is split into two separate 128-bit vectors.
6299 /// Then, the resulting 128-bit vectors are used to implement two
6300 /// horizontal binary operations.
6302 /// The kind of horizontal binary operation is defined by \p X86Opcode.
6304 /// \p Mode specifies how the 128-bit parts of V0 and V1 are passed in input to
6305 /// the two new horizontal binop.
6306 /// When Mode is set, the first horizontal binop dag node would take as input
6307 /// the lower 128-bit of V0 and the upper 128-bit of V0. The second
6308 /// horizontal binop dag node would take as input the lower 128-bit of V1
6309 /// and the upper 128-bit of V1.
6311 /// HADD V0_LO, V0_HI
6312 /// HADD V1_LO, V1_HI
6314 /// Otherwise, the first horizontal binop dag node takes as input the lower
6315 /// 128-bit of V0 and the lower 128-bit of V1, and the second horizontal binop
6316 /// dag node takes the the upper 128-bit of V0 and the upper 128-bit of V1.
6318 /// HADD V0_LO, V1_LO
6319 /// HADD V0_HI, V1_HI
6321 /// If \p isUndefLO is set, then the algorithm propagates UNDEF to the lower
6322 /// 128-bits of the result. If \p isUndefHI is set, then UNDEF is propagated to
6323 /// the upper 128-bits of the result.
6324 static SDValue ExpandHorizontalBinOp(const SDValue &V0, const SDValue &V1,
6325 SDLoc DL, SelectionDAG &DAG,
6326 unsigned X86Opcode, bool Mode,
6327 bool isUndefLO, bool isUndefHI) {
6328 EVT VT = V0.getValueType();
6329 assert(VT.is256BitVector() && VT == V1.getValueType() &&
6330 "Invalid nodes in input!");
6332 unsigned NumElts = VT.getVectorNumElements();
6333 SDValue V0_LO = Extract128BitVector(V0, 0, DAG, DL);
6334 SDValue V0_HI = Extract128BitVector(V0, NumElts/2, DAG, DL);
6335 SDValue V1_LO = Extract128BitVector(V1, 0, DAG, DL);
6336 SDValue V1_HI = Extract128BitVector(V1, NumElts/2, DAG, DL);
6337 EVT NewVT = V0_LO.getValueType();
6339 SDValue LO = DAG.getUNDEF(NewVT);
6340 SDValue HI = DAG.getUNDEF(NewVT);
6343 // Don't emit a horizontal binop if the result is expected to be UNDEF.
6344 if (!isUndefLO && V0->getOpcode() != ISD::UNDEF)
6345 LO = DAG.getNode(X86Opcode, DL, NewVT, V0_LO, V0_HI);
6346 if (!isUndefHI && V1->getOpcode() != ISD::UNDEF)
6347 HI = DAG.getNode(X86Opcode, DL, NewVT, V1_LO, V1_HI);
6349 // Don't emit a horizontal binop if the result is expected to be UNDEF.
6350 if (!isUndefLO && (V0_LO->getOpcode() != ISD::UNDEF ||
6351 V1_LO->getOpcode() != ISD::UNDEF))
6352 LO = DAG.getNode(X86Opcode, DL, NewVT, V0_LO, V1_LO);
6354 if (!isUndefHI && (V0_HI->getOpcode() != ISD::UNDEF ||
6355 V1_HI->getOpcode() != ISD::UNDEF))
6356 HI = DAG.getNode(X86Opcode, DL, NewVT, V0_HI, V1_HI);
6359 return DAG.getNode(ISD::CONCAT_VECTORS, DL, VT, LO, HI);
6362 /// \brief Try to fold a build_vector that performs an 'addsub' into the
6363 /// sequence of 'vadd + vsub + blendi'.
6364 static SDValue matchAddSub(const BuildVectorSDNode *BV, SelectionDAG &DAG,
6365 const X86Subtarget *Subtarget) {
6367 EVT VT = BV->getValueType(0);
6368 unsigned NumElts = VT.getVectorNumElements();
6369 SDValue InVec0 = DAG.getUNDEF(VT);
6370 SDValue InVec1 = DAG.getUNDEF(VT);
6372 assert((VT == MVT::v8f32 || VT == MVT::v4f64 || VT == MVT::v4f32 ||
6373 VT == MVT::v2f64) && "build_vector with an invalid type found!");
6375 // Don't try to emit a VSELECT that cannot be lowered into a blend.
6376 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
6377 if (!TLI.isOperationLegalOrCustom(ISD::VSELECT, VT))
6380 // Odd-numbered elements in the input build vector are obtained from
6381 // adding two integer/float elements.
6382 // Even-numbered elements in the input build vector are obtained from
6383 // subtracting two integer/float elements.
6384 unsigned ExpectedOpcode = ISD::FSUB;
6385 unsigned NextExpectedOpcode = ISD::FADD;
6386 bool AddFound = false;
6387 bool SubFound = false;
6389 for (unsigned i = 0, e = NumElts; i != e; i++) {
6390 SDValue Op = BV->getOperand(i);
6392 // Skip 'undef' values.
6393 unsigned Opcode = Op.getOpcode();
6394 if (Opcode == ISD::UNDEF) {
6395 std::swap(ExpectedOpcode, NextExpectedOpcode);
6399 // Early exit if we found an unexpected opcode.
6400 if (Opcode != ExpectedOpcode)
6403 SDValue Op0 = Op.getOperand(0);
6404 SDValue Op1 = Op.getOperand(1);
6406 // Try to match the following pattern:
6407 // (BINOP (extract_vector_elt A, i), (extract_vector_elt B, i))
6408 // Early exit if we cannot match that sequence.
6409 if (Op0.getOpcode() != ISD::EXTRACT_VECTOR_ELT ||
6410 Op1.getOpcode() != ISD::EXTRACT_VECTOR_ELT ||
6411 !isa<ConstantSDNode>(Op0.getOperand(1)) ||
6412 !isa<ConstantSDNode>(Op1.getOperand(1)) ||
6413 Op0.getOperand(1) != Op1.getOperand(1))
6416 unsigned I0 = cast<ConstantSDNode>(Op0.getOperand(1))->getZExtValue();
6420 // We found a valid add/sub node. Update the information accordingly.
6426 // Update InVec0 and InVec1.
6427 if (InVec0.getOpcode() == ISD::UNDEF)
6428 InVec0 = Op0.getOperand(0);
6429 if (InVec1.getOpcode() == ISD::UNDEF)
6430 InVec1 = Op1.getOperand(0);
6432 // Make sure that operands in input to each add/sub node always
6433 // come from a same pair of vectors.
6434 if (InVec0 != Op0.getOperand(0)) {
6435 if (ExpectedOpcode == ISD::FSUB)
6438 // FADD is commutable. Try to commute the operands
6439 // and then test again.
6440 std::swap(Op0, Op1);
6441 if (InVec0 != Op0.getOperand(0))
6445 if (InVec1 != Op1.getOperand(0))
6448 // Update the pair of expected opcodes.
6449 std::swap(ExpectedOpcode, NextExpectedOpcode);
6452 // Don't try to fold this build_vector into a VSELECT if it has
6453 // too many UNDEF operands.
6454 if (AddFound && SubFound && InVec0.getOpcode() != ISD::UNDEF &&
6455 InVec1.getOpcode() != ISD::UNDEF) {
6456 // Emit a sequence of vector add and sub followed by a VSELECT.
6457 // The new VSELECT will be lowered into a BLENDI.
6458 // At ISel stage, we pattern-match the sequence 'add + sub + BLENDI'
6459 // and emit a single ADDSUB instruction.
6460 SDValue Sub = DAG.getNode(ExpectedOpcode, DL, VT, InVec0, InVec1);
6461 SDValue Add = DAG.getNode(NextExpectedOpcode, DL, VT, InVec0, InVec1);
6463 // Construct the VSELECT mask.
6464 EVT MaskVT = VT.changeVectorElementTypeToInteger();
6465 EVT SVT = MaskVT.getVectorElementType();
6466 unsigned SVTBits = SVT.getSizeInBits();
6467 SmallVector<SDValue, 8> Ops;
6469 for (unsigned i = 0, e = NumElts; i != e; ++i) {
6470 APInt Value = i & 1 ? APInt::getNullValue(SVTBits) :
6471 APInt::getAllOnesValue(SVTBits);
6472 SDValue Constant = DAG.getConstant(Value, SVT);
6473 Ops.push_back(Constant);
6476 SDValue Mask = DAG.getNode(ISD::BUILD_VECTOR, DL, MaskVT, Ops);
6477 return DAG.getSelect(DL, VT, Mask, Sub, Add);
6483 static SDValue PerformBUILD_VECTORCombine(SDNode *N, SelectionDAG &DAG,
6484 const X86Subtarget *Subtarget) {
6486 EVT VT = N->getValueType(0);
6487 unsigned NumElts = VT.getVectorNumElements();
6488 BuildVectorSDNode *BV = cast<BuildVectorSDNode>(N);
6489 SDValue InVec0, InVec1;
6491 // Try to match an ADDSUB.
6492 if ((Subtarget->hasSSE3() && (VT == MVT::v4f32 || VT == MVT::v2f64)) ||
6493 (Subtarget->hasAVX() && (VT == MVT::v8f32 || VT == MVT::v4f64))) {
6494 SDValue Value = matchAddSub(BV, DAG, Subtarget);
6495 if (Value.getNode())
6499 // Try to match horizontal ADD/SUB.
6500 unsigned NumUndefsLO = 0;
6501 unsigned NumUndefsHI = 0;
6502 unsigned Half = NumElts/2;
6504 // Count the number of UNDEF operands in the build_vector in input.
6505 for (unsigned i = 0, e = Half; i != e; ++i)
6506 if (BV->getOperand(i)->getOpcode() == ISD::UNDEF)
6509 for (unsigned i = Half, e = NumElts; i != e; ++i)
6510 if (BV->getOperand(i)->getOpcode() == ISD::UNDEF)
6513 // Early exit if this is either a build_vector of all UNDEFs or all the
6514 // operands but one are UNDEF.
6515 if (NumUndefsLO + NumUndefsHI + 1 >= NumElts)
6518 if ((VT == MVT::v4f32 || VT == MVT::v2f64) && Subtarget->hasSSE3()) {
6519 // Try to match an SSE3 float HADD/HSUB.
6520 if (isHorizontalBinOp(BV, ISD::FADD, DAG, 0, NumElts, InVec0, InVec1))
6521 return DAG.getNode(X86ISD::FHADD, DL, VT, InVec0, InVec1);
6523 if (isHorizontalBinOp(BV, ISD::FSUB, DAG, 0, NumElts, InVec0, InVec1))
6524 return DAG.getNode(X86ISD::FHSUB, DL, VT, InVec0, InVec1);
6525 } else if ((VT == MVT::v4i32 || VT == MVT::v8i16) && Subtarget->hasSSSE3()) {
6526 // Try to match an SSSE3 integer HADD/HSUB.
6527 if (isHorizontalBinOp(BV, ISD::ADD, DAG, 0, NumElts, InVec0, InVec1))
6528 return DAG.getNode(X86ISD::HADD, DL, VT, InVec0, InVec1);
6530 if (isHorizontalBinOp(BV, ISD::SUB, DAG, 0, NumElts, InVec0, InVec1))
6531 return DAG.getNode(X86ISD::HSUB, DL, VT, InVec0, InVec1);
6534 if (!Subtarget->hasAVX())
6537 if ((VT == MVT::v8f32 || VT == MVT::v4f64)) {
6538 // Try to match an AVX horizontal add/sub of packed single/double
6539 // precision floating point values from 256-bit vectors.
6540 SDValue InVec2, InVec3;
6541 if (isHorizontalBinOp(BV, ISD::FADD, DAG, 0, Half, InVec0, InVec1) &&
6542 isHorizontalBinOp(BV, ISD::FADD, DAG, Half, NumElts, InVec2, InVec3) &&
6543 ((InVec0.getOpcode() == ISD::UNDEF ||
6544 InVec2.getOpcode() == ISD::UNDEF) || InVec0 == InVec2) &&
6545 ((InVec1.getOpcode() == ISD::UNDEF ||
6546 InVec3.getOpcode() == ISD::UNDEF) || InVec1 == InVec3))
6547 return DAG.getNode(X86ISD::FHADD, DL, VT, InVec0, InVec1);
6549 if (isHorizontalBinOp(BV, ISD::FSUB, DAG, 0, Half, InVec0, InVec1) &&
6550 isHorizontalBinOp(BV, ISD::FSUB, DAG, Half, NumElts, InVec2, InVec3) &&
6551 ((InVec0.getOpcode() == ISD::UNDEF ||
6552 InVec2.getOpcode() == ISD::UNDEF) || InVec0 == InVec2) &&
6553 ((InVec1.getOpcode() == ISD::UNDEF ||
6554 InVec3.getOpcode() == ISD::UNDEF) || InVec1 == InVec3))
6555 return DAG.getNode(X86ISD::FHSUB, DL, VT, InVec0, InVec1);
6556 } else if (VT == MVT::v8i32 || VT == MVT::v16i16) {
6557 // Try to match an AVX2 horizontal add/sub of signed integers.
6558 SDValue InVec2, InVec3;
6560 bool CanFold = true;
6562 if (isHorizontalBinOp(BV, ISD::ADD, DAG, 0, Half, InVec0, InVec1) &&
6563 isHorizontalBinOp(BV, ISD::ADD, DAG, Half, NumElts, InVec2, InVec3) &&
6564 ((InVec0.getOpcode() == ISD::UNDEF ||
6565 InVec2.getOpcode() == ISD::UNDEF) || InVec0 == InVec2) &&
6566 ((InVec1.getOpcode() == ISD::UNDEF ||
6567 InVec3.getOpcode() == ISD::UNDEF) || InVec1 == InVec3))
6568 X86Opcode = X86ISD::HADD;
6569 else if (isHorizontalBinOp(BV, ISD::SUB, DAG, 0, Half, InVec0, InVec1) &&
6570 isHorizontalBinOp(BV, ISD::SUB, DAG, Half, NumElts, InVec2, InVec3) &&
6571 ((InVec0.getOpcode() == ISD::UNDEF ||
6572 InVec2.getOpcode() == ISD::UNDEF) || InVec0 == InVec2) &&
6573 ((InVec1.getOpcode() == ISD::UNDEF ||
6574 InVec3.getOpcode() == ISD::UNDEF) || InVec1 == InVec3))
6575 X86Opcode = X86ISD::HSUB;
6580 // Fold this build_vector into a single horizontal add/sub.
6581 // Do this only if the target has AVX2.
6582 if (Subtarget->hasAVX2())
6583 return DAG.getNode(X86Opcode, DL, VT, InVec0, InVec1);
6585 // Do not try to expand this build_vector into a pair of horizontal
6586 // add/sub if we can emit a pair of scalar add/sub.
6587 if (NumUndefsLO + 1 == Half || NumUndefsHI + 1 == Half)
6590 // Convert this build_vector into a pair of horizontal binop followed by
6592 bool isUndefLO = NumUndefsLO == Half;
6593 bool isUndefHI = NumUndefsHI == Half;
6594 return ExpandHorizontalBinOp(InVec0, InVec1, DL, DAG, X86Opcode, false,
6595 isUndefLO, isUndefHI);
6599 if ((VT == MVT::v8f32 || VT == MVT::v4f64 || VT == MVT::v8i32 ||
6600 VT == MVT::v16i16) && Subtarget->hasAVX()) {
6602 if (isHorizontalBinOp(BV, ISD::ADD, DAG, 0, NumElts, InVec0, InVec1))
6603 X86Opcode = X86ISD::HADD;
6604 else if (isHorizontalBinOp(BV, ISD::SUB, DAG, 0, NumElts, InVec0, InVec1))
6605 X86Opcode = X86ISD::HSUB;
6606 else if (isHorizontalBinOp(BV, ISD::FADD, DAG, 0, NumElts, InVec0, InVec1))
6607 X86Opcode = X86ISD::FHADD;
6608 else if (isHorizontalBinOp(BV, ISD::FSUB, DAG, 0, NumElts, InVec0, InVec1))
6609 X86Opcode = X86ISD::FHSUB;
6613 // Don't try to expand this build_vector into a pair of horizontal add/sub
6614 // if we can simply emit a pair of scalar add/sub.
6615 if (NumUndefsLO + 1 == Half || NumUndefsHI + 1 == Half)
6618 // Convert this build_vector into two horizontal add/sub followed by
6620 bool isUndefLO = NumUndefsLO == Half;
6621 bool isUndefHI = NumUndefsHI == Half;
6622 return ExpandHorizontalBinOp(InVec0, InVec1, DL, DAG, X86Opcode, true,
6623 isUndefLO, isUndefHI);
6630 X86TargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const {
6633 MVT VT = Op.getSimpleValueType();
6634 MVT ExtVT = VT.getVectorElementType();
6635 unsigned NumElems = Op.getNumOperands();
6637 // Generate vectors for predicate vectors.
6638 if (VT.getScalarType() == MVT::i1 && Subtarget->hasAVX512())
6639 return LowerBUILD_VECTORvXi1(Op, DAG);
6641 // Vectors containing all zeros can be matched by pxor and xorps later
6642 if (ISD::isBuildVectorAllZeros(Op.getNode())) {
6643 // Canonicalize this to <4 x i32> to 1) ensure the zero vectors are CSE'd
6644 // and 2) ensure that i64 scalars are eliminated on x86-32 hosts.
6645 if (VT == MVT::v4i32 || VT == MVT::v8i32 || VT == MVT::v16i32)
6648 return getZeroVector(VT, Subtarget, DAG, dl);
6651 // Vectors containing all ones can be matched by pcmpeqd on 128-bit width
6652 // vectors or broken into v4i32 operations on 256-bit vectors. AVX2 can use
6653 // vpcmpeqd on 256-bit vectors.
6654 if (Subtarget->hasSSE2() && ISD::isBuildVectorAllOnes(Op.getNode())) {
6655 if (VT == MVT::v4i32 || (VT == MVT::v8i32 && Subtarget->hasInt256()))
6658 if (!VT.is512BitVector())
6659 return getOnesVector(VT, Subtarget->hasInt256(), DAG, dl);
6662 SDValue Broadcast = LowerVectorBroadcast(Op, Subtarget, DAG);
6663 if (Broadcast.getNode())
6666 unsigned EVTBits = ExtVT.getSizeInBits();
6668 unsigned NumZero = 0;
6669 unsigned NumNonZero = 0;
6670 unsigned NonZeros = 0;
6671 bool IsAllConstants = true;
6672 SmallSet<SDValue, 8> Values;
6673 for (unsigned i = 0; i < NumElems; ++i) {
6674 SDValue Elt = Op.getOperand(i);
6675 if (Elt.getOpcode() == ISD::UNDEF)
6678 if (Elt.getOpcode() != ISD::Constant &&
6679 Elt.getOpcode() != ISD::ConstantFP)
6680 IsAllConstants = false;
6681 if (X86::isZeroNode(Elt))
6684 NonZeros |= (1 << i);
6689 // All undef vector. Return an UNDEF. All zero vectors were handled above.
6690 if (NumNonZero == 0)
6691 return DAG.getUNDEF(VT);
6693 // Special case for single non-zero, non-undef, element.
6694 if (NumNonZero == 1) {
6695 unsigned Idx = countTrailingZeros(NonZeros);
6696 SDValue Item = Op.getOperand(Idx);
6698 // If this is an insertion of an i64 value on x86-32, and if the top bits of
6699 // the value are obviously zero, truncate the value to i32 and do the
6700 // insertion that way. Only do this if the value is non-constant or if the
6701 // value is a constant being inserted into element 0. It is cheaper to do
6702 // a constant pool load than it is to do a movd + shuffle.
6703 if (ExtVT == MVT::i64 && !Subtarget->is64Bit() &&
6704 (!IsAllConstants || Idx == 0)) {
6705 if (DAG.MaskedValueIsZero(Item, APInt::getBitsSet(64, 32, 64))) {
6707 assert(VT == MVT::v2i64 && "Expected an SSE value type!");
6708 EVT VecVT = MVT::v4i32;
6709 unsigned VecElts = 4;
6711 // Truncate the value (which may itself be a constant) to i32, and
6712 // convert it to a vector with movd (S2V+shuffle to zero extend).
6713 Item = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, Item);
6714 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VecVT, Item);
6715 Item = getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
6717 // Now we have our 32-bit value zero extended in the low element of
6718 // a vector. If Idx != 0, swizzle it into place.
6720 SmallVector<int, 4> Mask;
6721 Mask.push_back(Idx);
6722 for (unsigned i = 1; i != VecElts; ++i)
6724 Item = DAG.getVectorShuffle(VecVT, dl, Item, DAG.getUNDEF(VecVT),
6727 return DAG.getNode(ISD::BITCAST, dl, VT, Item);
6731 // If we have a constant or non-constant insertion into the low element of
6732 // a vector, we can do this with SCALAR_TO_VECTOR + shuffle of zero into
6733 // the rest of the elements. This will be matched as movd/movq/movss/movsd
6734 // depending on what the source datatype is.
6737 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
6739 if (ExtVT == MVT::i32 || ExtVT == MVT::f32 || ExtVT == MVT::f64 ||
6740 (ExtVT == MVT::i64 && Subtarget->is64Bit())) {
6741 if (VT.is256BitVector() || VT.is512BitVector()) {
6742 SDValue ZeroVec = getZeroVector(VT, Subtarget, DAG, dl);
6743 return DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, ZeroVec,
6744 Item, DAG.getIntPtrConstant(0));
6746 assert(VT.is128BitVector() && "Expected an SSE value type!");
6747 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
6748 // Turn it into a MOVL (i.e. movss, movsd, or movd) to a zero vector.
6749 return getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
6752 if (ExtVT == MVT::i16 || ExtVT == MVT::i8) {
6753 Item = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, Item);
6754 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32, Item);
6755 if (VT.is256BitVector()) {
6756 SDValue ZeroVec = getZeroVector(MVT::v8i32, Subtarget, DAG, dl);
6757 Item = Insert128BitVector(ZeroVec, Item, 0, DAG, dl);
6759 assert(VT.is128BitVector() && "Expected an SSE value type!");
6760 Item = getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
6762 return DAG.getNode(ISD::BITCAST, dl, VT, Item);
6766 // Is it a vector logical left shift?
6767 if (NumElems == 2 && Idx == 1 &&
6768 X86::isZeroNode(Op.getOperand(0)) &&
6769 !X86::isZeroNode(Op.getOperand(1))) {
6770 unsigned NumBits = VT.getSizeInBits();
6771 return getVShift(true, VT,
6772 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
6773 VT, Op.getOperand(1)),
6774 NumBits/2, DAG, *this, dl);
6777 if (IsAllConstants) // Otherwise, it's better to do a constpool load.
6780 // Otherwise, if this is a vector with i32 or f32 elements, and the element
6781 // is a non-constant being inserted into an element other than the low one,
6782 // we can't use a constant pool load. Instead, use SCALAR_TO_VECTOR (aka
6783 // movd/movss) to move this into the low element, then shuffle it into
6785 if (EVTBits == 32) {
6786 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
6788 // Turn it into a shuffle of zero and zero-extended scalar to vector.
6789 Item = getShuffleVectorZeroOrUndef(Item, 0, NumZero > 0, Subtarget, DAG);
6790 SmallVector<int, 8> MaskVec;
6791 for (unsigned i = 0; i != NumElems; ++i)
6792 MaskVec.push_back(i == Idx ? 0 : 1);
6793 return DAG.getVectorShuffle(VT, dl, Item, DAG.getUNDEF(VT), &MaskVec[0]);
6797 // Splat is obviously ok. Let legalizer expand it to a shuffle.
6798 if (Values.size() == 1) {
6799 if (EVTBits == 32) {
6800 // Instead of a shuffle like this:
6801 // shuffle (scalar_to_vector (load (ptr + 4))), undef, <0, 0, 0, 0>
6802 // Check if it's possible to issue this instead.
6803 // shuffle (vload ptr)), undef, <1, 1, 1, 1>
6804 unsigned Idx = countTrailingZeros(NonZeros);
6805 SDValue Item = Op.getOperand(Idx);
6806 if (Op.getNode()->isOnlyUserOf(Item.getNode()))
6807 return LowerAsSplatVectorLoad(Item, VT, dl, DAG);
6812 // A vector full of immediates; various special cases are already
6813 // handled, so this is best done with a single constant-pool load.
6817 // For AVX-length vectors, build the individual 128-bit pieces and use
6818 // shuffles to put them in place.
6819 if (VT.is256BitVector() || VT.is512BitVector()) {
6820 SmallVector<SDValue, 64> V;
6821 for (unsigned i = 0; i != NumElems; ++i)
6822 V.push_back(Op.getOperand(i));
6824 EVT HVT = EVT::getVectorVT(*DAG.getContext(), ExtVT, NumElems/2);
6826 // Build both the lower and upper subvector.
6827 SDValue Lower = DAG.getNode(ISD::BUILD_VECTOR, dl, HVT,
6828 makeArrayRef(&V[0], NumElems/2));
6829 SDValue Upper = DAG.getNode(ISD::BUILD_VECTOR, dl, HVT,
6830 makeArrayRef(&V[NumElems / 2], NumElems/2));
6832 // Recreate the wider vector with the lower and upper part.
6833 if (VT.is256BitVector())
6834 return Concat128BitVectors(Lower, Upper, VT, NumElems, DAG, dl);
6835 return Concat256BitVectors(Lower, Upper, VT, NumElems, DAG, dl);
6838 // Let legalizer expand 2-wide build_vectors.
6839 if (EVTBits == 64) {
6840 if (NumNonZero == 1) {
6841 // One half is zero or undef.
6842 unsigned Idx = countTrailingZeros(NonZeros);
6843 SDValue V2 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT,
6844 Op.getOperand(Idx));
6845 return getShuffleVectorZeroOrUndef(V2, Idx, true, Subtarget, DAG);
6850 // If element VT is < 32 bits, convert it to inserts into a zero vector.
6851 if (EVTBits == 8 && NumElems == 16) {
6852 SDValue V = LowerBuildVectorv16i8(Op, NonZeros,NumNonZero,NumZero, DAG,
6854 if (V.getNode()) return V;
6857 if (EVTBits == 16 && NumElems == 8) {
6858 SDValue V = LowerBuildVectorv8i16(Op, NonZeros,NumNonZero,NumZero, DAG,
6860 if (V.getNode()) return V;
6863 // If element VT is == 32 bits and has 4 elems, try to generate an INSERTPS
6864 if (EVTBits == 32 && NumElems == 4) {
6865 SDValue V = LowerBuildVectorv4x32(Op, NumElems, NonZeros, NumNonZero,
6866 NumZero, DAG, Subtarget, *this);
6871 // If element VT is == 32 bits, turn it into a number of shuffles.
6872 SmallVector<SDValue, 8> V(NumElems);
6873 if (NumElems == 4 && NumZero > 0) {
6874 for (unsigned i = 0; i < 4; ++i) {
6875 bool isZero = !(NonZeros & (1 << i));
6877 V[i] = getZeroVector(VT, Subtarget, DAG, dl);
6879 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
6882 for (unsigned i = 0; i < 2; ++i) {
6883 switch ((NonZeros & (0x3 << i*2)) >> (i*2)) {
6886 V[i] = V[i*2]; // Must be a zero vector.
6889 V[i] = getMOVL(DAG, dl, VT, V[i*2+1], V[i*2]);
6892 V[i] = getMOVL(DAG, dl, VT, V[i*2], V[i*2+1]);
6895 V[i] = getUnpackl(DAG, dl, VT, V[i*2], V[i*2+1]);
6900 bool Reverse1 = (NonZeros & 0x3) == 2;
6901 bool Reverse2 = ((NonZeros & (0x3 << 2)) >> 2) == 2;
6905 static_cast<int>(Reverse2 ? NumElems+1 : NumElems),
6906 static_cast<int>(Reverse2 ? NumElems : NumElems+1)
6908 return DAG.getVectorShuffle(VT, dl, V[0], V[1], &MaskVec[0]);
6911 if (Values.size() > 1 && VT.is128BitVector()) {
6912 // Check for a build vector of consecutive loads.
6913 for (unsigned i = 0; i < NumElems; ++i)
6914 V[i] = Op.getOperand(i);
6916 // Check for elements which are consecutive loads.
6917 SDValue LD = EltsFromConsecutiveLoads(VT, V, dl, DAG, false);
6921 // Check for a build vector from mostly shuffle plus few inserting.
6922 SDValue Sh = buildFromShuffleMostly(Op, DAG);
6926 // For SSE 4.1, use insertps to put the high elements into the low element.
6927 if (getSubtarget()->hasSSE41()) {
6929 if (Op.getOperand(0).getOpcode() != ISD::UNDEF)
6930 Result = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(0));
6932 Result = DAG.getUNDEF(VT);
6934 for (unsigned i = 1; i < NumElems; ++i) {
6935 if (Op.getOperand(i).getOpcode() == ISD::UNDEF) continue;
6936 Result = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Result,
6937 Op.getOperand(i), DAG.getIntPtrConstant(i));
6942 // Otherwise, expand into a number of unpckl*, start by extending each of
6943 // our (non-undef) elements to the full vector width with the element in the
6944 // bottom slot of the vector (which generates no code for SSE).
6945 for (unsigned i = 0; i < NumElems; ++i) {
6946 if (Op.getOperand(i).getOpcode() != ISD::UNDEF)
6947 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
6949 V[i] = DAG.getUNDEF(VT);
6952 // Next, we iteratively mix elements, e.g. for v4f32:
6953 // Step 1: unpcklps 0, 2 ==> X: <?, ?, 2, 0>
6954 // : unpcklps 1, 3 ==> Y: <?, ?, 3, 1>
6955 // Step 2: unpcklps X, Y ==> <3, 2, 1, 0>
6956 unsigned EltStride = NumElems >> 1;
6957 while (EltStride != 0) {
6958 for (unsigned i = 0; i < EltStride; ++i) {
6959 // If V[i+EltStride] is undef and this is the first round of mixing,
6960 // then it is safe to just drop this shuffle: V[i] is already in the
6961 // right place, the one element (since it's the first round) being
6962 // inserted as undef can be dropped. This isn't safe for successive
6963 // rounds because they will permute elements within both vectors.
6964 if (V[i+EltStride].getOpcode() == ISD::UNDEF &&
6965 EltStride == NumElems/2)
6968 V[i] = getUnpackl(DAG, dl, VT, V[i], V[i + EltStride]);
6977 // LowerAVXCONCAT_VECTORS - 256-bit AVX can use the vinsertf128 instruction
6978 // to create 256-bit vectors from two other 128-bit ones.
6979 static SDValue LowerAVXCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
6981 MVT ResVT = Op.getSimpleValueType();
6983 assert((ResVT.is256BitVector() ||
6984 ResVT.is512BitVector()) && "Value type must be 256-/512-bit wide");
6986 SDValue V1 = Op.getOperand(0);
6987 SDValue V2 = Op.getOperand(1);
6988 unsigned NumElems = ResVT.getVectorNumElements();
6989 if(ResVT.is256BitVector())
6990 return Concat128BitVectors(V1, V2, ResVT, NumElems, DAG, dl);
6992 if (Op.getNumOperands() == 4) {
6993 MVT HalfVT = MVT::getVectorVT(ResVT.getScalarType(),
6994 ResVT.getVectorNumElements()/2);
6995 SDValue V3 = Op.getOperand(2);
6996 SDValue V4 = Op.getOperand(3);
6997 return Concat256BitVectors(Concat128BitVectors(V1, V2, HalfVT, NumElems/2, DAG, dl),
6998 Concat128BitVectors(V3, V4, HalfVT, NumElems/2, DAG, dl), ResVT, NumElems, DAG, dl);
7000 return Concat256BitVectors(V1, V2, ResVT, NumElems, DAG, dl);
7003 static SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
7004 MVT LLVM_ATTRIBUTE_UNUSED VT = Op.getSimpleValueType();
7005 assert((VT.is256BitVector() && Op.getNumOperands() == 2) ||
7006 (VT.is512BitVector() && (Op.getNumOperands() == 2 ||
7007 Op.getNumOperands() == 4)));
7009 // AVX can use the vinsertf128 instruction to create 256-bit vectors
7010 // from two other 128-bit ones.
7012 // 512-bit vector may contain 2 256-bit vectors or 4 128-bit vectors
7013 return LowerAVXCONCAT_VECTORS(Op, DAG);
7017 //===----------------------------------------------------------------------===//
7018 // Vector shuffle lowering
7020 // This is an experimental code path for lowering vector shuffles on x86. It is
7021 // designed to handle arbitrary vector shuffles and blends, gracefully
7022 // degrading performance as necessary. It works hard to recognize idiomatic
7023 // shuffles and lower them to optimal instruction patterns without leaving
7024 // a framework that allows reasonably efficient handling of all vector shuffle
7026 //===----------------------------------------------------------------------===//
7028 /// \brief Tiny helper function to identify a no-op mask.
7030 /// This is a somewhat boring predicate function. It checks whether the mask
7031 /// array input, which is assumed to be a single-input shuffle mask of the kind
7032 /// used by the X86 shuffle instructions (not a fully general
7033 /// ShuffleVectorSDNode mask) requires any shuffles to occur. Both undef and an
7034 /// in-place shuffle are 'no-op's.
7035 static bool isNoopShuffleMask(ArrayRef<int> Mask) {
7036 for (int i = 0, Size = Mask.size(); i < Size; ++i)
7037 if (Mask[i] != -1 && Mask[i] != i)
7042 /// \brief Helper function to classify a mask as a single-input mask.
7044 /// This isn't a generic single-input test because in the vector shuffle
7045 /// lowering we canonicalize single inputs to be the first input operand. This
7046 /// means we can more quickly test for a single input by only checking whether
7047 /// an input from the second operand exists. We also assume that the size of
7048 /// mask corresponds to the size of the input vectors which isn't true in the
7049 /// fully general case.
7050 static bool isSingleInputShuffleMask(ArrayRef<int> Mask) {
7052 if (M >= (int)Mask.size())
7057 /// \brief Get a 4-lane 8-bit shuffle immediate for a mask.
7059 /// This helper function produces an 8-bit shuffle immediate corresponding to
7060 /// the ubiquitous shuffle encoding scheme used in x86 instructions for
7061 /// shuffling 4 lanes. It can be used with most of the PSHUF instructions for
7064 /// NB: We rely heavily on "undef" masks preserving the input lane.
7065 static SDValue getV4X86ShuffleImm8ForMask(ArrayRef<int> Mask,
7066 SelectionDAG &DAG) {
7067 assert(Mask.size() == 4 && "Only 4-lane shuffle masks");
7068 assert(Mask[0] >= -1 && Mask[0] < 4 && "Out of bound mask element!");
7069 assert(Mask[1] >= -1 && Mask[1] < 4 && "Out of bound mask element!");
7070 assert(Mask[2] >= -1 && Mask[2] < 4 && "Out of bound mask element!");
7071 assert(Mask[3] >= -1 && Mask[3] < 4 && "Out of bound mask element!");
7074 Imm |= (Mask[0] == -1 ? 0 : Mask[0]) << 0;
7075 Imm |= (Mask[1] == -1 ? 1 : Mask[1]) << 2;
7076 Imm |= (Mask[2] == -1 ? 2 : Mask[2]) << 4;
7077 Imm |= (Mask[3] == -1 ? 3 : Mask[3]) << 6;
7078 return DAG.getConstant(Imm, MVT::i8);
7081 /// \brief Handle lowering of 2-lane 64-bit floating point shuffles.
7083 /// This is the basis function for the 2-lane 64-bit shuffles as we have full
7084 /// support for floating point shuffles but not integer shuffles. These
7085 /// instructions will incur a domain crossing penalty on some chips though so
7086 /// it is better to avoid lowering through this for integer vectors where
7088 static SDValue lowerV2F64VectorShuffle(SDValue Op, SDValue V1, SDValue V2,
7089 const X86Subtarget *Subtarget,
7090 SelectionDAG &DAG) {
7092 assert(Op.getSimpleValueType() == MVT::v2f64 && "Bad shuffle type!");
7093 assert(V1.getSimpleValueType() == MVT::v2f64 && "Bad operand type!");
7094 assert(V2.getSimpleValueType() == MVT::v2f64 && "Bad operand type!");
7095 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
7096 ArrayRef<int> Mask = SVOp->getMask();
7097 assert(Mask.size() == 2 && "Unexpected mask size for v2 shuffle!");
7099 if (isSingleInputShuffleMask(Mask)) {
7100 // Straight shuffle of a single input vector. Simulate this by using the
7101 // single input as both of the "inputs" to this instruction..
7102 unsigned SHUFPDMask = (Mask[0] == 1) | ((Mask[1] == 1) << 1);
7103 return DAG.getNode(X86ISD::SHUFP, SDLoc(Op), MVT::v2f64, V1, V1,
7104 DAG.getConstant(SHUFPDMask, MVT::i8));
7106 assert(Mask[0] >= 0 && Mask[0] < 2 && "Non-canonicalized blend!");
7107 assert(Mask[1] >= 2 && "Non-canonicalized blend!");
7109 unsigned SHUFPDMask = (Mask[0] == 1) | (((Mask[1] - 2) == 1) << 1);
7110 return DAG.getNode(X86ISD::SHUFP, SDLoc(Op), MVT::v2f64, V1, V2,
7111 DAG.getConstant(SHUFPDMask, MVT::i8));
7114 /// \brief Handle lowering of 2-lane 64-bit integer shuffles.
7116 /// Tries to lower a 2-lane 64-bit shuffle using shuffle operations provided by
7117 /// the integer unit to minimize domain crossing penalties. However, for blends
7118 /// it falls back to the floating point shuffle operation with appropriate bit
7120 static SDValue lowerV2I64VectorShuffle(SDValue Op, SDValue V1, SDValue V2,
7121 const X86Subtarget *Subtarget,
7122 SelectionDAG &DAG) {
7124 assert(Op.getSimpleValueType() == MVT::v2i64 && "Bad shuffle type!");
7125 assert(V1.getSimpleValueType() == MVT::v2i64 && "Bad operand type!");
7126 assert(V2.getSimpleValueType() == MVT::v2i64 && "Bad operand type!");
7127 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
7128 ArrayRef<int> Mask = SVOp->getMask();
7129 assert(Mask.size() == 2 && "Unexpected mask size for v2 shuffle!");
7131 if (isSingleInputShuffleMask(Mask)) {
7132 // Straight shuffle of a single input vector. For everything from SSE2
7133 // onward this has a single fast instruction with no scary immediates.
7134 // We have to map the mask as it is actually a v4i32 shuffle instruction.
7135 V1 = DAG.getNode(ISD::BITCAST, DL, MVT::v4i32, V1);
7136 int WidenedMask[4] = {
7137 std::max(Mask[0], 0) * 2, std::max(Mask[0], 0) * 2 + 1,
7138 std::max(Mask[1], 0) * 2, std::max(Mask[1], 0) * 2 + 1};
7140 ISD::BITCAST, DL, MVT::v2i64,
7141 DAG.getNode(X86ISD::PSHUFD, SDLoc(Op), MVT::v4i32, V1,
7142 getV4X86ShuffleImm8ForMask(WidenedMask, DAG)));
7145 // We implement this with SHUFPD which is pretty lame because it will likely
7146 // incur 2 cycles of stall for integer vectors on Nehalem and older chips.
7147 // However, all the alternatives are still more cycles and newer chips don't
7148 // have this problem. It would be really nice if x86 had better shuffles here.
7149 V1 = DAG.getNode(ISD::BITCAST, DL, MVT::v2f64, V1);
7150 V2 = DAG.getNode(ISD::BITCAST, DL, MVT::v2f64, V2);
7151 return DAG.getNode(ISD::BITCAST, DL, MVT::v2i64,
7152 DAG.getVectorShuffle(MVT::v2f64, DL, V1, V2, Mask));
7155 /// \brief Lower 4-lane 32-bit floating point shuffles.
7157 /// Uses instructions exclusively from the floating point unit to minimize
7158 /// domain crossing penalties, as these are sufficient to implement all v4f32
7160 static SDValue lowerV4F32VectorShuffle(SDValue Op, SDValue V1, SDValue V2,
7161 const X86Subtarget *Subtarget,
7162 SelectionDAG &DAG) {
7164 assert(Op.getSimpleValueType() == MVT::v4f32 && "Bad shuffle type!");
7165 assert(V1.getSimpleValueType() == MVT::v4f32 && "Bad operand type!");
7166 assert(V2.getSimpleValueType() == MVT::v4f32 && "Bad operand type!");
7167 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
7168 ArrayRef<int> Mask = SVOp->getMask();
7169 assert(Mask.size() == 4 && "Unexpected mask size for v4 shuffle!");
7171 SDValue LowV = V1, HighV = V2;
7172 int NewMask[4] = {Mask[0], Mask[1], Mask[2], Mask[3]};
7175 std::count_if(Mask.begin(), Mask.end(), [](int M) { return M >= 4; });
7177 if (NumV2Elements == 0)
7178 // Straight shuffle of a single input vector. We pass the input vector to
7179 // both operands to simulate this with a SHUFPS.
7180 return DAG.getNode(X86ISD::SHUFP, DL, MVT::v4f32, V1, V1,
7181 getV4X86ShuffleImm8ForMask(Mask, DAG));
7183 if (NumV2Elements == 1) {
7185 std::find_if(Mask.begin(), Mask.end(), [](int M) { return M >= 4; }) -
7187 // Compute the index adjacent to V2Index and in the same half by toggling
7189 int V2AdjIndex = V2Index ^ 1;
7191 if (Mask[V2AdjIndex] == -1) {
7192 // Handles all the cases where we have a single V2 element and an undef.
7193 // This will only ever happen in the high lanes because we commute the
7194 // vector otherwise.
7196 std::swap(LowV, HighV);
7197 NewMask[V2Index] -= 4;
7199 // Handle the case where the V2 element ends up adjacent to a V1 element.
7200 // To make this work, blend them together as the first step.
7201 int V1Index = V2AdjIndex;
7202 int BlendMask[4] = {Mask[V2Index] - 4, 0, Mask[V1Index], 0};
7203 V2 = DAG.getNode(X86ISD::SHUFP, DL, MVT::v4f32, V2, V1,
7204 getV4X86ShuffleImm8ForMask(BlendMask, DAG));
7206 // Now proceed to reconstruct the final blend as we have the necessary
7207 // high or low half formed.
7214 NewMask[V1Index] = 2; // We put the V1 element in V2[2].
7215 NewMask[V2Index] = 0; // We shifted the V2 element into V2[0].
7217 } else if (NumV2Elements == 2) {
7218 if (Mask[0] < 4 && Mask[1] < 4) {
7219 // Handle the easy case where we have V1 in the low lanes and V2 in the
7220 // high lanes. We never see this reversed because we sort the shuffle.
7224 // We have a mixture of V1 and V2 in both low and high lanes. Rather than
7225 // trying to place elements directly, just blend them and set up the final
7226 // shuffle to place them.
7228 // The first two blend mask elements are for V1, the second two are for
7230 int BlendMask[4] = {Mask[0] < 4 ? Mask[0] : Mask[1],
7231 Mask[2] < 4 ? Mask[2] : Mask[3],
7232 (Mask[0] >= 4 ? Mask[0] : Mask[1]) - 4,
7233 (Mask[2] >= 4 ? Mask[2] : Mask[3]) - 4};
7234 V1 = DAG.getNode(X86ISD::SHUFP, DL, MVT::v4f32, V1, V2,
7235 getV4X86ShuffleImm8ForMask(BlendMask, DAG));
7237 // Now we do a normal shuffle of V1 by giving V1 as both operands to
7240 NewMask[0] = Mask[0] < 4 ? 0 : 2;
7241 NewMask[1] = Mask[0] < 4 ? 2 : 0;
7242 NewMask[2] = Mask[2] < 4 ? 1 : 3;
7243 NewMask[3] = Mask[2] < 4 ? 3 : 1;
7246 return DAG.getNode(X86ISD::SHUFP, DL, MVT::v4f32, LowV, HighV,
7247 getV4X86ShuffleImm8ForMask(NewMask, DAG));
7250 /// \brief Lower 4-lane i32 vector shuffles.
7252 /// We try to handle these with integer-domain shuffles where we can, but for
7253 /// blends we use the floating point domain blend instructions.
7254 static SDValue lowerV4I32VectorShuffle(SDValue Op, SDValue V1, SDValue V2,
7255 const X86Subtarget *Subtarget,
7256 SelectionDAG &DAG) {
7258 assert(Op.getSimpleValueType() == MVT::v4i32 && "Bad shuffle type!");
7259 assert(V1.getSimpleValueType() == MVT::v4i32 && "Bad operand type!");
7260 assert(V2.getSimpleValueType() == MVT::v4i32 && "Bad operand type!");
7261 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
7262 ArrayRef<int> Mask = SVOp->getMask();
7263 assert(Mask.size() == 4 && "Unexpected mask size for v4 shuffle!");
7265 if (isSingleInputShuffleMask(Mask))
7266 // Straight shuffle of a single input vector. For everything from SSE2
7267 // onward this has a single fast instruction with no scary immediates.
7268 return DAG.getNode(X86ISD::PSHUFD, DL, MVT::v4i32, V1,
7269 getV4X86ShuffleImm8ForMask(Mask, DAG));
7271 // We implement this with SHUFPS because it can blend from two vectors.
7272 // Because we're going to eventually use SHUFPS, we use SHUFPS even to build
7273 // up the inputs, bypassing domain shift penalties that we would encur if we
7274 // directly used PSHUFD on Nehalem and older. For newer chips, this isn't
7276 return DAG.getNode(ISD::BITCAST, DL, MVT::v4i32,
7277 DAG.getVectorShuffle(
7279 DAG.getNode(ISD::BITCAST, DL, MVT::v4f32, V1),
7280 DAG.getNode(ISD::BITCAST, DL, MVT::v4f32, V2), Mask));
7283 /// \brief Lowering of single-input v8i16 shuffles is the cornerstone of SSE2
7284 /// shuffle lowering, and the most complex part.
7286 /// The lowering strategy is to try to form pairs of input lanes which are
7287 /// targeted at the same half of the final vector, and then use a dword shuffle
7288 /// to place them onto the right half, and finally unpack the paired lanes into
7289 /// their final position.
7291 /// The exact breakdown of how to form these dword pairs and align them on the
7292 /// correct sides is really tricky. See the comments within the function for
7293 /// more of the details.
7294 static SDValue lowerV8I16SingleInputVectorShuffle(
7295 SDLoc DL, SDValue V, MutableArrayRef<int> Mask,
7296 const X86Subtarget *Subtarget, SelectionDAG &DAG) {
7297 assert(V.getSimpleValueType() == MVT::v8i16 && "Bad input type!");
7298 MutableArrayRef<int> LoMask = Mask.slice(0, 4);
7299 MutableArrayRef<int> HiMask = Mask.slice(4, 4);
7301 SmallVector<int, 4> LoInputs;
7302 std::copy_if(LoMask.begin(), LoMask.end(), std::back_inserter(LoInputs),
7303 [](int M) { return M >= 0; });
7304 std::sort(LoInputs.begin(), LoInputs.end());
7305 LoInputs.erase(std::unique(LoInputs.begin(), LoInputs.end()), LoInputs.end());
7306 SmallVector<int, 4> HiInputs;
7307 std::copy_if(HiMask.begin(), HiMask.end(), std::back_inserter(HiInputs),
7308 [](int M) { return M >= 0; });
7309 std::sort(HiInputs.begin(), HiInputs.end());
7310 HiInputs.erase(std::unique(HiInputs.begin(), HiInputs.end()), HiInputs.end());
7312 std::lower_bound(LoInputs.begin(), LoInputs.end(), 4) - LoInputs.begin();
7313 int NumHToL = LoInputs.size() - NumLToL;
7315 std::lower_bound(HiInputs.begin(), HiInputs.end(), 4) - HiInputs.begin();
7316 int NumHToH = HiInputs.size() - NumLToH;
7317 MutableArrayRef<int> LToLInputs(LoInputs.data(), NumLToL);
7318 MutableArrayRef<int> LToHInputs(HiInputs.data(), NumLToH);
7319 MutableArrayRef<int> HToLInputs(LoInputs.data() + NumLToL, NumHToL);
7320 MutableArrayRef<int> HToHInputs(HiInputs.data() + NumLToH, NumHToH);
7322 // Simplify the 1-into-3 and 3-into-1 cases with a single pshufd. For all
7323 // such inputs we can swap two of the dwords across the half mark and end up
7324 // with <=2 inputs to each half in each half. Once there, we can fall through
7325 // to the generic code below. For example:
7327 // Input: [a, b, c, d, e, f, g, h] -PSHUFD[0,2,1,3]-> [a, b, e, f, c, d, g, h]
7328 // Mask: [0, 1, 2, 7, 4, 5, 6, 3] -----------------> [0, 1, 4, 7, 2, 3, 6, 5]
7330 // However in some very rare cases we have a 1-into-3 or 3-into-1 on one half
7331 // and an existing 2-into-2 on the other half. In this case we may have to
7332 // pre-shuffle the 2-into-2 half to avoid turning it into a 3-into-1 or
7333 // 1-into-3 which could cause us to cycle endlessly fixing each side in turn.
7334 // Fortunately, we don't have to handle anything but a 2-into-2 pattern
7335 // because any other situation (including a 3-into-1 or 1-into-3 in the other
7336 // half than the one we target for fixing) will be fixed when we re-enter this
7337 // path. We will also combine away any sequence of PSHUFD instructions that
7338 // result into a single instruction. Here is an example of the tricky case:
7340 // Input: [a, b, c, d, e, f, g, h] -PSHUFD[0,2,1,3]-> [a, b, e, f, c, d, g, h]
7341 // Mask: [3, 7, 1, 0, 2, 7, 3, 5] -THIS-IS-BAD!!!!-> [5, 7, 1, 0, 4, 7, 5, 3]
7343 // This now has a 1-into-3 in the high half! Instead, we do two shuffles:
7345 // Input: [a, b, c, d, e, f, g, h] PSHUFHW[0,2,1,3]-> [a, b, c, d, e, g, f, h]
7346 // Mask: [3, 7, 1, 0, 2, 7, 3, 5] -----------------> [3, 7, 1, 0, 2, 7, 3, 6]
7348 // Input: [a, b, c, d, e, g, f, h] -PSHUFD[0,2,1,3]-> [a, b, e, g, c, d, f, h]
7349 // Mask: [3, 7, 1, 0, 2, 7, 3, 6] -----------------> [5, 7, 1, 0, 4, 7, 5, 6]
7351 // The result is fine to be handled by the generic logic.
7352 auto balanceSides = [&](ArrayRef<int> AToAInputs, ArrayRef<int> BToAInputs,
7353 ArrayRef<int> BToBInputs, ArrayRef<int> AToBInputs,
7354 int AOffset, int BOffset) {
7355 assert(AToAInputs.size() == 3 || AToAInputs.size() == 1 &&
7356 "Must call this with A having 3 or 1 inputs from the A half.");
7357 assert(BToAInputs.size() == 1 || BToAInputs.size() == 3 &&
7358 "Must call this with B having 1 or 3 inputs from the B half.");
7359 assert(AToAInputs.size() + BToAInputs.size() == 4 &&
7360 "Must call this with either 3:1 or 1:3 inputs (summing to 4).");
7362 // Compute the index of dword with only one word among the three inputs in
7363 // a half by taking the sum of the half with three inputs and subtracting
7364 // the sum of the actual three inputs. The difference is the remaining
7367 int &TripleDWord = AToAInputs.size() == 3 ? ADWord : BDWord;
7368 int &OneInputDWord = AToAInputs.size() == 3 ? BDWord : ADWord;
7369 int TripleInputOffset = AToAInputs.size() == 3 ? AOffset : BOffset;
7370 ArrayRef<int> TripleInputs = AToAInputs.size() == 3 ? AToAInputs : BToAInputs;
7371 int OneInput = AToAInputs.size() == 3 ? BToAInputs[0] : AToAInputs[0];
7372 int TripleInputSum = 0 + 1 + 2 + 3 + (4 * TripleInputOffset);
7373 int TripleNonInputIdx =
7374 TripleInputSum - std::accumulate(TripleInputs.begin(), TripleInputs.end(), 0);
7375 TripleDWord = TripleNonInputIdx / 2;
7377 // We use xor with one to compute the adjacent DWord to whichever one the
7379 OneInputDWord = (OneInput / 2) ^ 1;
7381 // Check for one tricky case: We're fixing a 3<-1 or a 1<-3 shuffle for AToA
7382 // and BToA inputs. If there is also such a problem with the BToB and AToB
7383 // inputs, we don't try to fix it necessarily -- we'll recurse and see it in
7384 // the next pass. However, if we have a 2<-2 in the BToB and AToB inputs, it
7385 // is essential that we don't *create* a 3<-1 as then we might oscillate.
7386 if (BToBInputs.size() == 2 && AToBInputs.size() == 2) {
7387 // Compute how many inputs will be flipped by swapping these DWords. We
7389 // to balance this to ensure we don't form a 3-1 shuffle in the other
7391 int NumFlippedAToBInputs =
7392 std::count(AToBInputs.begin(), AToBInputs.end(), 2 * ADWord) +
7393 std::count(AToBInputs.begin(), AToBInputs.end(), 2 * ADWord + 1);
7394 int NumFlippedBToBInputs =
7395 std::count(BToBInputs.begin(), BToBInputs.end(), 2 * BDWord) +
7396 std::count(BToBInputs.begin(), BToBInputs.end(), 2 * BDWord + 1);
7397 if ((NumFlippedAToBInputs == 1 &&
7398 (NumFlippedBToBInputs == 0 || NumFlippedBToBInputs == 2)) ||
7399 (NumFlippedBToBInputs == 1 &&
7400 (NumFlippedAToBInputs == 0 || NumFlippedAToBInputs == 2))) {
7401 // We choose whether to fix the A half or B half based on whether that
7402 // half has zero flipped inputs. At zero, we may not be able to fix it
7403 // with that half. We also bias towards fixing the B half because that
7404 // will more commonly be the high half, and we have to bias one way.
7405 auto FixFlippedInputs = [&V, &DL, &Mask, &DAG](int PinnedIdx, int DWord,
7406 ArrayRef<int> Inputs) {
7407 int FixIdx = PinnedIdx ^ 1; // The adjacent slot to the pinned slot.
7408 bool IsFixIdxInput = std::find(Inputs.begin(), Inputs.end(),
7409 PinnedIdx ^ 1) != Inputs.end();
7410 // Determine whether the free index is in the flipped dword or the
7411 // unflipped dword based on where the pinned index is. We use this bit
7412 // in an xor to conditionally select the adjacent dword.
7413 int FixFreeIdx = 2 * (DWord ^ (PinnedIdx / 2 == DWord));
7414 bool IsFixFreeIdxInput = std::find(Inputs.begin(), Inputs.end(),
7415 FixFreeIdx) != Inputs.end();
7416 if (IsFixIdxInput == IsFixFreeIdxInput)
7418 IsFixFreeIdxInput = std::find(Inputs.begin(), Inputs.end(),
7419 FixFreeIdx) != Inputs.end();
7420 assert(IsFixIdxInput != IsFixFreeIdxInput &&
7421 "We need to be changing the number of flipped inputs!");
7422 int PSHUFHalfMask[] = {0, 1, 2, 3};
7423 std::swap(PSHUFHalfMask[FixFreeIdx % 4], PSHUFHalfMask[FixIdx % 4]);
7424 V = DAG.getNode(FixIdx < 4 ? X86ISD::PSHUFLW : X86ISD::PSHUFHW, DL,
7426 getV4X86ShuffleImm8ForMask(PSHUFHalfMask, DAG));
7429 if (M != -1 && M == FixIdx)
7431 else if (M != -1 && M == FixFreeIdx)
7434 if (NumFlippedBToBInputs != 0) {
7436 BToAInputs.size() == 3 ? TripleNonInputIdx : OneInput;
7437 FixFlippedInputs(BPinnedIdx, BDWord, BToBInputs);
7439 assert(NumFlippedAToBInputs != 0 && "Impossible given predicates!");
7441 AToAInputs.size() == 3 ? TripleNonInputIdx : OneInput;
7442 FixFlippedInputs(APinnedIdx, ADWord, AToBInputs);
7447 int PSHUFDMask[] = {0, 1, 2, 3};
7448 PSHUFDMask[ADWord] = BDWord;
7449 PSHUFDMask[BDWord] = ADWord;
7450 V = DAG.getNode(ISD::BITCAST, DL, MVT::v8i16,
7451 DAG.getNode(X86ISD::PSHUFD, DL, MVT::v4i32,
7452 DAG.getNode(ISD::BITCAST, DL, MVT::v4i32, V),
7453 getV4X86ShuffleImm8ForMask(PSHUFDMask, DAG)));
7455 // Adjust the mask to match the new locations of A and B.
7457 if (M != -1 && M/2 == ADWord)
7458 M = 2 * BDWord + M % 2;
7459 else if (M != -1 && M/2 == BDWord)
7460 M = 2 * ADWord + M % 2;
7462 // Recurse back into this routine to re-compute state now that this isn't
7463 // a 3 and 1 problem.
7464 return DAG.getVectorShuffle(MVT::v8i16, DL, V, DAG.getUNDEF(MVT::v8i16),
7467 if ((NumLToL == 3 && NumHToL == 1) || (NumLToL == 1 && NumHToL == 3))
7468 return balanceSides(LToLInputs, HToLInputs, HToHInputs, LToHInputs, 0, 4);
7469 else if ((NumHToH == 3 && NumLToH == 1) || (NumHToH == 1 && NumLToH == 3))
7470 return balanceSides(HToHInputs, LToHInputs, LToLInputs, HToLInputs, 4, 0);
7472 // At this point there are at most two inputs to the low and high halves from
7473 // each half. That means the inputs can always be grouped into dwords and
7474 // those dwords can then be moved to the correct half with a dword shuffle.
7475 // We use at most one low and one high word shuffle to collect these paired
7476 // inputs into dwords, and finally a dword shuffle to place them.
7477 int PSHUFLMask[4] = {-1, -1, -1, -1};
7478 int PSHUFHMask[4] = {-1, -1, -1, -1};
7479 int PSHUFDMask[4] = {-1, -1, -1, -1};
7481 // First fix the masks for all the inputs that are staying in their
7482 // original halves. This will then dictate the targets of the cross-half
7484 auto fixInPlaceInputs =
7485 [&PSHUFDMask](ArrayRef<int> InPlaceInputs, ArrayRef<int> IncomingInputs,
7486 MutableArrayRef<int> SourceHalfMask,
7487 MutableArrayRef<int> HalfMask, int HalfOffset) {
7488 if (InPlaceInputs.empty())
7490 if (InPlaceInputs.size() == 1) {
7491 SourceHalfMask[InPlaceInputs[0] - HalfOffset] =
7492 InPlaceInputs[0] - HalfOffset;
7493 PSHUFDMask[InPlaceInputs[0] / 2] = InPlaceInputs[0] / 2;
7496 if (IncomingInputs.empty()) {
7497 // Just fix all of the in place inputs.
7498 for (int Input : InPlaceInputs) {
7499 SourceHalfMask[Input - HalfOffset] = Input - HalfOffset;
7500 PSHUFDMask[Input / 2] = Input / 2;
7505 assert(InPlaceInputs.size() == 2 && "Cannot handle 3 or 4 inputs!");
7506 SourceHalfMask[InPlaceInputs[0] - HalfOffset] =
7507 InPlaceInputs[0] - HalfOffset;
7508 // Put the second input next to the first so that they are packed into
7509 // a dword. We find the adjacent index by toggling the low bit.
7510 int AdjIndex = InPlaceInputs[0] ^ 1;
7511 SourceHalfMask[AdjIndex - HalfOffset] = InPlaceInputs[1] - HalfOffset;
7512 std::replace(HalfMask.begin(), HalfMask.end(), InPlaceInputs[1], AdjIndex);
7513 PSHUFDMask[AdjIndex / 2] = AdjIndex / 2;
7515 fixInPlaceInputs(LToLInputs, HToLInputs, PSHUFLMask, LoMask, 0);
7516 fixInPlaceInputs(HToHInputs, LToHInputs, PSHUFHMask, HiMask, 4);
7518 // Now gather the cross-half inputs and place them into a free dword of
7519 // their target half.
7520 // FIXME: This operation could almost certainly be simplified dramatically to
7521 // look more like the 3-1 fixing operation.
7522 auto moveInputsToRightHalf = [&PSHUFDMask](
7523 MutableArrayRef<int> IncomingInputs, ArrayRef<int> ExistingInputs,
7524 MutableArrayRef<int> SourceHalfMask, MutableArrayRef<int> HalfMask,
7525 MutableArrayRef<int> FinalSourceHalfMask, int SourceOffset,
7527 auto isWordClobbered = [](ArrayRef<int> SourceHalfMask, int Word) {
7528 return SourceHalfMask[Word] != -1 && SourceHalfMask[Word] != Word;
7530 auto isDWordClobbered = [&isWordClobbered](ArrayRef<int> SourceHalfMask,
7532 int LowWord = Word & ~1;
7533 int HighWord = Word | 1;
7534 return isWordClobbered(SourceHalfMask, LowWord) ||
7535 isWordClobbered(SourceHalfMask, HighWord);
7538 if (IncomingInputs.empty())
7541 if (ExistingInputs.empty()) {
7542 // Map any dwords with inputs from them into the right half.
7543 for (int Input : IncomingInputs) {
7544 // If the source half mask maps over the inputs, turn those into
7545 // swaps and use the swapped lane.
7546 if (isWordClobbered(SourceHalfMask, Input - SourceOffset)) {
7547 if (SourceHalfMask[SourceHalfMask[Input - SourceOffset]] == -1) {
7548 SourceHalfMask[SourceHalfMask[Input - SourceOffset]] =
7549 Input - SourceOffset;
7550 // We have to swap the uses in our half mask in one sweep.
7551 for (int &M : HalfMask)
7552 if (M == SourceHalfMask[Input - SourceOffset] + SourceOffset)
7554 else if (M == Input)
7555 M = SourceHalfMask[Input - SourceOffset] + SourceOffset;
7557 assert(SourceHalfMask[SourceHalfMask[Input - SourceOffset]] ==
7558 Input - SourceOffset &&
7559 "Previous placement doesn't match!");
7561 // Note that this correctly re-maps both when we do a swap and when
7562 // we observe the other side of the swap above. We rely on that to
7563 // avoid swapping the members of the input list directly.
7564 Input = SourceHalfMask[Input - SourceOffset] + SourceOffset;
7567 // Map the input's dword into the correct half.
7568 if (PSHUFDMask[(Input - SourceOffset + DestOffset) / 2] == -1)
7569 PSHUFDMask[(Input - SourceOffset + DestOffset) / 2] = Input / 2;
7571 assert(PSHUFDMask[(Input - SourceOffset + DestOffset) / 2] ==
7573 "Previous placement doesn't match!");
7576 // And just directly shift any other-half mask elements to be same-half
7577 // as we will have mirrored the dword containing the element into the
7578 // same position within that half.
7579 for (int &M : HalfMask)
7580 if (M >= SourceOffset && M < SourceOffset + 4) {
7581 M = M - SourceOffset + DestOffset;
7582 assert(M >= 0 && "This should never wrap below zero!");
7587 // Ensure we have the input in a viable dword of its current half. This
7588 // is particularly tricky because the original position may be clobbered
7589 // by inputs being moved and *staying* in that half.
7590 if (IncomingInputs.size() == 1) {
7591 if (isWordClobbered(SourceHalfMask, IncomingInputs[0] - SourceOffset)) {
7592 int InputFixed = std::find(std::begin(SourceHalfMask),
7593 std::end(SourceHalfMask), -1) -
7594 std::begin(SourceHalfMask) + SourceOffset;
7595 SourceHalfMask[InputFixed - SourceOffset] =
7596 IncomingInputs[0] - SourceOffset;
7597 std::replace(HalfMask.begin(), HalfMask.end(), IncomingInputs[0],
7599 IncomingInputs[0] = InputFixed;
7601 } else if (IncomingInputs.size() == 2) {
7602 if (IncomingInputs[0] / 2 != IncomingInputs[1] / 2 ||
7603 isDWordClobbered(SourceHalfMask, IncomingInputs[0] - SourceOffset)) {
7604 // We have two non-adjacent or clobbered inputs we need to extract from
7605 // the source half. To do this, we need to map them into some adjacent
7606 // dword slot in the source mask.
7607 int InputsFixed[2] = {IncomingInputs[0] - SourceOffset,
7608 IncomingInputs[1] - SourceOffset};
7610 // If there is a free slot in the source half mask adjacent to one of
7611 // the inputs, place the other input in it. We use (Index XOR 1) to
7612 // compute an adjacent index.
7613 if (!isWordClobbered(SourceHalfMask, InputsFixed[0]) &&
7614 SourceHalfMask[InputsFixed[0] ^ 1] == -1) {
7615 SourceHalfMask[InputsFixed[0]] = InputsFixed[0];
7616 SourceHalfMask[InputsFixed[0] ^ 1] = InputsFixed[1];
7617 InputsFixed[1] = InputsFixed[0] ^ 1;
7618 } else if (!isWordClobbered(SourceHalfMask, InputsFixed[1]) &&
7619 SourceHalfMask[InputsFixed[1] ^ 1] == -1) {
7620 SourceHalfMask[InputsFixed[1]] = InputsFixed[1];
7621 SourceHalfMask[InputsFixed[1] ^ 1] = InputsFixed[0];
7622 InputsFixed[0] = InputsFixed[1] ^ 1;
7623 } else if (SourceHalfMask[2 * ((InputsFixed[0] / 2) ^ 1)] == -1 &&
7624 SourceHalfMask[2 * ((InputsFixed[0] / 2) ^ 1) + 1] == -1) {
7625 // The two inputs are in the same DWord but it is clobbered and the
7626 // adjacent DWord isn't used at all. Move both inputs to the free
7628 SourceHalfMask[2 * ((InputsFixed[0] / 2) ^ 1)] = InputsFixed[0];
7629 SourceHalfMask[2 * ((InputsFixed[0] / 2) ^ 1) + 1] = InputsFixed[1];
7630 InputsFixed[0] = 2 * ((InputsFixed[0] / 2) ^ 1);
7631 InputsFixed[1] = 2 * ((InputsFixed[0] / 2) ^ 1) + 1;
7633 // The only way we hit this point is if there is no clobbering
7634 // (because there are no off-half inputs to this half) and there is no
7635 // free slot adjacent to one of the inputs. In this case, we have to
7636 // swap an input with a non-input.
7637 for (int i = 0; i < 4; ++i)
7638 assert((SourceHalfMask[i] == -1 || SourceHalfMask[i] == i) &&
7639 "We can't handle any clobbers here!");
7640 assert(InputsFixed[1] != (InputsFixed[0] ^ 1) &&
7641 "Cannot have adjacent inputs here!");
7643 SourceHalfMask[InputsFixed[0] ^ 1] = InputsFixed[1];
7644 SourceHalfMask[InputsFixed[1]] = InputsFixed[0] ^ 1;
7646 // We also have to update the final source mask in this case because
7647 // it may need to undo the above swap.
7648 for (int &M : FinalSourceHalfMask)
7649 if (M == (InputsFixed[0] ^ 1) + SourceOffset)
7650 M = InputsFixed[1] + SourceOffset;
7651 else if (M == InputsFixed[1] + SourceOffset)
7652 M = (InputsFixed[0] ^ 1) + SourceOffset;
7654 InputsFixed[1] = InputsFixed[0] ^ 1;
7657 // Point everything at the fixed inputs.
7658 for (int &M : HalfMask)
7659 if (M == IncomingInputs[0])
7660 M = InputsFixed[0] + SourceOffset;
7661 else if (M == IncomingInputs[1])
7662 M = InputsFixed[1] + SourceOffset;
7664 IncomingInputs[0] = InputsFixed[0] + SourceOffset;
7665 IncomingInputs[1] = InputsFixed[1] + SourceOffset;
7668 llvm_unreachable("Unhandled input size!");
7671 // Now hoist the DWord down to the right half.
7672 int FreeDWord = (PSHUFDMask[DestOffset / 2] == -1 ? 0 : 1) + DestOffset / 2;
7673 assert(PSHUFDMask[FreeDWord] == -1 && "DWord not free");
7674 PSHUFDMask[FreeDWord] = IncomingInputs[0] / 2;
7675 for (int &M : HalfMask)
7676 for (int Input : IncomingInputs)
7678 M = FreeDWord * 2 + Input % 2;
7680 moveInputsToRightHalf(HToLInputs, LToLInputs, PSHUFHMask, LoMask, HiMask,
7681 /*SourceOffset*/ 4, /*DestOffset*/ 0);
7682 moveInputsToRightHalf(LToHInputs, HToHInputs, PSHUFLMask, HiMask, LoMask,
7683 /*SourceOffset*/ 0, /*DestOffset*/ 4);
7685 // Now enact all the shuffles we've computed to move the inputs into their
7687 if (!isNoopShuffleMask(PSHUFLMask))
7688 V = DAG.getNode(X86ISD::PSHUFLW, DL, MVT::v8i16, V,
7689 getV4X86ShuffleImm8ForMask(PSHUFLMask, DAG));
7690 if (!isNoopShuffleMask(PSHUFHMask))
7691 V = DAG.getNode(X86ISD::PSHUFHW, DL, MVT::v8i16, V,
7692 getV4X86ShuffleImm8ForMask(PSHUFHMask, DAG));
7693 if (!isNoopShuffleMask(PSHUFDMask))
7694 V = DAG.getNode(ISD::BITCAST, DL, MVT::v8i16,
7695 DAG.getNode(X86ISD::PSHUFD, DL, MVT::v4i32,
7696 DAG.getNode(ISD::BITCAST, DL, MVT::v4i32, V),
7697 getV4X86ShuffleImm8ForMask(PSHUFDMask, DAG)));
7699 // At this point, each half should contain all its inputs, and we can then
7700 // just shuffle them into their final position.
7701 assert(std::count_if(LoMask.begin(), LoMask.end(),
7702 [](int M) { return M >= 4; }) == 0 &&
7703 "Failed to lift all the high half inputs to the low mask!");
7704 assert(std::count_if(HiMask.begin(), HiMask.end(),
7705 [](int M) { return M >= 0 && M < 4; }) == 0 &&
7706 "Failed to lift all the low half inputs to the high mask!");
7708 // Do a half shuffle for the low mask.
7709 if (!isNoopShuffleMask(LoMask))
7710 V = DAG.getNode(X86ISD::PSHUFLW, DL, MVT::v8i16, V,
7711 getV4X86ShuffleImm8ForMask(LoMask, DAG));
7713 // Do a half shuffle with the high mask after shifting its values down.
7714 for (int &M : HiMask)
7717 if (!isNoopShuffleMask(HiMask))
7718 V = DAG.getNode(X86ISD::PSHUFHW, DL, MVT::v8i16, V,
7719 getV4X86ShuffleImm8ForMask(HiMask, DAG));
7724 /// \brief Detect whether the mask pattern should be lowered through
7727 /// This essentially tests whether viewing the mask as an interleaving of two
7728 /// sub-sequences reduces the cross-input traffic of a blend operation. If so,
7729 /// lowering it through interleaving is a significantly better strategy.
7730 static bool shouldLowerAsInterleaving(ArrayRef<int> Mask) {
7731 int NumEvenInputs[2] = {0, 0};
7732 int NumOddInputs[2] = {0, 0};
7733 int NumLoInputs[2] = {0, 0};
7734 int NumHiInputs[2] = {0, 0};
7735 for (int i = 0, Size = Mask.size(); i < Size; ++i) {
7739 int InputIdx = Mask[i] >= Size;
7742 ++NumLoInputs[InputIdx];
7744 ++NumHiInputs[InputIdx];
7747 ++NumEvenInputs[InputIdx];
7749 ++NumOddInputs[InputIdx];
7752 // The minimum number of cross-input results for both the interleaved and
7753 // split cases. If interleaving results in fewer cross-input results, return
7755 int InterleavedCrosses = std::min(NumEvenInputs[1] + NumOddInputs[0],
7756 NumEvenInputs[0] + NumOddInputs[1]);
7757 int SplitCrosses = std::min(NumLoInputs[1] + NumHiInputs[0],
7758 NumLoInputs[0] + NumHiInputs[1]);
7759 return InterleavedCrosses < SplitCrosses;
7762 /// \brief Blend two v8i16 vectors using a naive unpack strategy.
7764 /// This strategy only works when the inputs from each vector fit into a single
7765 /// half of that vector, and generally there are not so many inputs as to leave
7766 /// the in-place shuffles required highly constrained (and thus expensive). It
7767 /// shifts all the inputs into a single side of both input vectors and then
7768 /// uses an unpack to interleave these inputs in a single vector. At that
7769 /// point, we will fall back on the generic single input shuffle lowering.
7770 static SDValue lowerV8I16BasicBlendVectorShuffle(SDLoc DL, SDValue V1,
7772 MutableArrayRef<int> Mask,
7773 const X86Subtarget *Subtarget,
7774 SelectionDAG &DAG) {
7775 assert(V1.getSimpleValueType() == MVT::v8i16 && "Bad input type!");
7776 assert(V2.getSimpleValueType() == MVT::v8i16 && "Bad input type!");
7777 SmallVector<int, 3> LoV1Inputs, HiV1Inputs, LoV2Inputs, HiV2Inputs;
7778 for (int i = 0; i < 8; ++i)
7779 if (Mask[i] >= 0 && Mask[i] < 4)
7780 LoV1Inputs.push_back(i);
7781 else if (Mask[i] >= 4 && Mask[i] < 8)
7782 HiV1Inputs.push_back(i);
7783 else if (Mask[i] >= 8 && Mask[i] < 12)
7784 LoV2Inputs.push_back(i);
7785 else if (Mask[i] >= 12)
7786 HiV2Inputs.push_back(i);
7788 int NumV1Inputs = LoV1Inputs.size() + HiV1Inputs.size();
7789 int NumV2Inputs = LoV2Inputs.size() + HiV2Inputs.size();
7792 assert(NumV1Inputs > 0 && NumV1Inputs <= 3 && "At most 3 inputs supported");
7793 assert(NumV2Inputs > 0 && NumV2Inputs <= 3 && "At most 3 inputs supported");
7794 assert(NumV1Inputs + NumV2Inputs <= 4 && "At most 4 combined inputs");
7796 bool MergeFromLo = LoV1Inputs.size() + LoV2Inputs.size() >=
7797 HiV1Inputs.size() + HiV2Inputs.size();
7799 auto moveInputsToHalf = [&](SDValue V, ArrayRef<int> LoInputs,
7800 ArrayRef<int> HiInputs, bool MoveToLo,
7802 ArrayRef<int> GoodInputs = MoveToLo ? LoInputs : HiInputs;
7803 ArrayRef<int> BadInputs = MoveToLo ? HiInputs : LoInputs;
7804 if (BadInputs.empty())
7807 int MoveMask[] = {-1, -1, -1, -1, -1, -1, -1, -1};
7808 int MoveOffset = MoveToLo ? 0 : 4;
7810 if (GoodInputs.empty()) {
7811 for (int BadInput : BadInputs) {
7812 MoveMask[Mask[BadInput] % 4 + MoveOffset] = Mask[BadInput] - MaskOffset;
7813 Mask[BadInput] = Mask[BadInput] % 4 + MoveOffset + MaskOffset;
7816 if (GoodInputs.size() == 2) {
7817 // If the low inputs are spread across two dwords, pack them into
7819 MoveMask[MoveOffset] = Mask[GoodInputs[0]] - MaskOffset;
7820 MoveMask[MoveOffset + 1] = Mask[GoodInputs[1]] - MaskOffset;
7821 Mask[GoodInputs[0]] = MoveOffset + MaskOffset;
7822 Mask[GoodInputs[1]] = MoveOffset + 1 + MaskOffset;
7824 // Otherwise pin the good inputs.
7825 for (int GoodInput : GoodInputs)
7826 MoveMask[Mask[GoodInput] - MaskOffset] = Mask[GoodInput] - MaskOffset;
7829 if (BadInputs.size() == 2) {
7830 // If we have two bad inputs then there may be either one or two good
7831 // inputs fixed in place. Find a fixed input, and then find the *other*
7832 // two adjacent indices by using modular arithmetic.
7834 std::find_if(std::begin(MoveMask) + MoveOffset, std::end(MoveMask),
7835 [](int M) { return M >= 0; }) -
7836 std::begin(MoveMask);
7838 ((((GoodMaskIdx - MoveOffset) & ~1) + 2) % 4) + MoveOffset;
7839 assert(MoveMask[MoveMaskIdx] == -1 && "Expected empty slot");
7840 assert(MoveMask[MoveMaskIdx + 1] == -1 && "Expected empty slot");
7841 MoveMask[MoveMaskIdx] = Mask[BadInputs[0]] - MaskOffset;
7842 MoveMask[MoveMaskIdx + 1] = Mask[BadInputs[1]] - MaskOffset;
7843 Mask[BadInputs[0]] = MoveMaskIdx + MaskOffset;
7844 Mask[BadInputs[1]] = MoveMaskIdx + 1 + MaskOffset;
7846 assert(BadInputs.size() == 1 && "All sizes handled");
7847 int MoveMaskIdx = std::find(std::begin(MoveMask) + MoveOffset,
7848 std::end(MoveMask), -1) -
7849 std::begin(MoveMask);
7850 MoveMask[MoveMaskIdx] = Mask[BadInputs[0]] - MaskOffset;
7851 Mask[BadInputs[0]] = MoveMaskIdx + MaskOffset;
7855 return DAG.getVectorShuffle(MVT::v8i16, DL, V, DAG.getUNDEF(MVT::v8i16),
7858 V1 = moveInputsToHalf(V1, LoV1Inputs, HiV1Inputs, MergeFromLo,
7860 V2 = moveInputsToHalf(V2, LoV2Inputs, HiV2Inputs, MergeFromLo,
7863 // FIXME: Select an interleaving of the merge of V1 and V2 that minimizes
7864 // cross-half traffic in the final shuffle.
7866 // Munge the mask to be a single-input mask after the unpack merges the
7870 M = 2 * (M % 4) + (M / 8);
7872 return DAG.getVectorShuffle(
7873 MVT::v8i16, DL, DAG.getNode(MergeFromLo ? X86ISD::UNPCKL : X86ISD::UNPCKH,
7874 DL, MVT::v8i16, V1, V2),
7875 DAG.getUNDEF(MVT::v8i16), Mask);
7878 /// \brief Generic lowering of 8-lane i16 shuffles.
7880 /// This handles both single-input shuffles and combined shuffle/blends with
7881 /// two inputs. The single input shuffles are immediately delegated to
7882 /// a dedicated lowering routine.
7884 /// The blends are lowered in one of three fundamental ways. If there are few
7885 /// enough inputs, it delegates to a basic UNPCK-based strategy. If the shuffle
7886 /// of the input is significantly cheaper when lowered as an interleaving of
7887 /// the two inputs, try to interleave them. Otherwise, blend the low and high
7888 /// halves of the inputs separately (making them have relatively few inputs)
7889 /// and then concatenate them.
7890 static SDValue lowerV8I16VectorShuffle(SDValue Op, SDValue V1, SDValue V2,
7891 const X86Subtarget *Subtarget,
7892 SelectionDAG &DAG) {
7894 assert(Op.getSimpleValueType() == MVT::v8i16 && "Bad shuffle type!");
7895 assert(V1.getSimpleValueType() == MVT::v8i16 && "Bad operand type!");
7896 assert(V2.getSimpleValueType() == MVT::v8i16 && "Bad operand type!");
7897 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
7898 ArrayRef<int> OrigMask = SVOp->getMask();
7899 int MaskStorage[8] = {OrigMask[0], OrigMask[1], OrigMask[2], OrigMask[3],
7900 OrigMask[4], OrigMask[5], OrigMask[6], OrigMask[7]};
7901 MutableArrayRef<int> Mask(MaskStorage);
7903 assert(Mask.size() == 8 && "Unexpected mask size for v8 shuffle!");
7905 auto isV1 = [](int M) { return M >= 0 && M < 8; };
7906 auto isV2 = [](int M) { return M >= 8; };
7908 int NumV1Inputs = std::count_if(Mask.begin(), Mask.end(), isV1);
7909 int NumV2Inputs = std::count_if(Mask.begin(), Mask.end(), isV2);
7911 if (NumV2Inputs == 0)
7912 return lowerV8I16SingleInputVectorShuffle(DL, V1, Mask, Subtarget, DAG);
7914 assert(NumV1Inputs > 0 && "All single-input shuffles should be canonicalized "
7915 "to be V1-input shuffles.");
7917 if (NumV1Inputs + NumV2Inputs <= 4)
7918 return lowerV8I16BasicBlendVectorShuffle(DL, V1, V2, Mask, Subtarget, DAG);
7920 // Check whether an interleaving lowering is likely to be more efficient.
7921 // This isn't perfect but it is a strong heuristic that tends to work well on
7922 // the kinds of shuffles that show up in practice.
7924 // FIXME: Handle 1x, 2x, and 4x interleaving.
7925 if (shouldLowerAsInterleaving(Mask)) {
7926 // FIXME: Figure out whether we should pack these into the low or high
7929 int EMask[8], OMask[8];
7930 for (int i = 0; i < 4; ++i) {
7931 EMask[i] = Mask[2*i];
7932 OMask[i] = Mask[2*i + 1];
7937 SDValue Evens = DAG.getVectorShuffle(MVT::v8i16, DL, V1, V2, EMask);
7938 SDValue Odds = DAG.getVectorShuffle(MVT::v8i16, DL, V1, V2, OMask);
7940 return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v8i16, Evens, Odds);
7943 int LoBlendMask[8] = {-1, -1, -1, -1, -1, -1, -1, -1};
7944 int HiBlendMask[8] = {-1, -1, -1, -1, -1, -1, -1, -1};
7946 for (int i = 0; i < 4; ++i) {
7947 LoBlendMask[i] = Mask[i];
7948 HiBlendMask[i] = Mask[i + 4];
7951 SDValue LoV = DAG.getVectorShuffle(MVT::v8i16, DL, V1, V2, LoBlendMask);
7952 SDValue HiV = DAG.getVectorShuffle(MVT::v8i16, DL, V1, V2, HiBlendMask);
7953 LoV = DAG.getNode(ISD::BITCAST, DL, MVT::v2i64, LoV);
7954 HiV = DAG.getNode(ISD::BITCAST, DL, MVT::v2i64, HiV);
7956 return DAG.getNode(ISD::BITCAST, DL, MVT::v8i16,
7957 DAG.getNode(X86ISD::UNPCKL, DL, MVT::v2i64, LoV, HiV));
7960 /// \brief Check whether a compaction lowering can be done by dropping even
7961 /// elements and compute how many times even elements must be dropped.
7963 /// This handles shuffles which take every Nth element where N is a power of
7964 /// two. Example shuffle masks:
7966 /// N = 1: 0, 2, 4, 6, 8, 10, 12, 14, 0, 2, 4, 6, 8, 10, 12, 14
7967 /// N = 1: 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30
7968 /// N = 2: 0, 4, 8, 12, 0, 4, 8, 12, 0, 4, 8, 12, 0, 4, 8, 12
7969 /// N = 2: 0, 4, 8, 12, 16, 20, 24, 28, 0, 4, 8, 12, 16, 20, 24, 28
7970 /// N = 3: 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8
7971 /// N = 3: 0, 8, 16, 24, 0, 8, 16, 24, 0, 8, 16, 24, 0, 8, 16, 24
7973 /// Any of these lanes can of course be undef.
7975 /// This routine only supports N <= 3.
7976 /// FIXME: Evaluate whether either AVX or AVX-512 have any opportunities here
7979 /// \returns N above, or the number of times even elements must be dropped if
7980 /// there is such a number. Otherwise returns zero.
7981 static int canLowerByDroppingEvenElements(ArrayRef<int> Mask) {
7982 // Figure out whether we're looping over two inputs or just one.
7983 bool IsSingleInput = isSingleInputShuffleMask(Mask);
7985 // The modulus for the shuffle vector entries is based on whether this is
7986 // a single input or not.
7987 int ShuffleModulus = Mask.size() * (IsSingleInput ? 1 : 2);
7988 assert(isPowerOf2_32((uint32_t)ShuffleModulus) &&
7989 "We should only be called with masks with a power-of-2 size!");
7991 uint64_t ModMask = (uint64_t)ShuffleModulus - 1;
7993 // We track whether the input is viable for all power-of-2 strides 2^1, 2^2,
7994 // and 2^3 simultaneously. This is because we may have ambiguity with
7995 // partially undef inputs.
7996 bool ViableForN[3] = {true, true, true};
7998 for (int i = 0, e = Mask.size(); i < e; ++i) {
7999 // Ignore undef lanes, we'll optimistically collapse them to the pattern we
8004 bool IsAnyViable = false;
8005 for (unsigned j = 0; j != array_lengthof(ViableForN); ++j)
8006 if (ViableForN[j]) {
8009 // The shuffle mask must be equal to (i * 2^N) % M.
8010 if ((uint64_t)Mask[i] == (((uint64_t)i << N) & ModMask))
8013 ViableForN[j] = false;
8015 // Early exit if we exhaust the possible powers of two.
8020 for (unsigned j = 0; j != array_lengthof(ViableForN); ++j)
8024 // Return 0 as there is no viable power of two.
8028 /// \brief Generic lowering of v16i8 shuffles.
8030 /// This is a hybrid strategy to lower v16i8 vectors. It first attempts to
8031 /// detect any complexity reducing interleaving. If that doesn't help, it uses
8032 /// UNPCK to spread the i8 elements across two i16-element vectors, and uses
8033 /// the existing lowering for v8i16 blends on each half, finally PACK-ing them
8035 static SDValue lowerV16I8VectorShuffle(SDValue Op, SDValue V1, SDValue V2,
8036 const X86Subtarget *Subtarget,
8037 SelectionDAG &DAG) {
8039 assert(Op.getSimpleValueType() == MVT::v16i8 && "Bad shuffle type!");
8040 assert(V1.getSimpleValueType() == MVT::v16i8 && "Bad operand type!");
8041 assert(V2.getSimpleValueType() == MVT::v16i8 && "Bad operand type!");
8042 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
8043 ArrayRef<int> OrigMask = SVOp->getMask();
8044 assert(OrigMask.size() == 16 && "Unexpected mask size for v16 shuffle!");
8045 int MaskStorage[16] = {
8046 OrigMask[0], OrigMask[1], OrigMask[2], OrigMask[3],
8047 OrigMask[4], OrigMask[5], OrigMask[6], OrigMask[7],
8048 OrigMask[8], OrigMask[9], OrigMask[10], OrigMask[11],
8049 OrigMask[12], OrigMask[13], OrigMask[14], OrigMask[15]};
8050 MutableArrayRef<int> Mask(MaskStorage);
8051 MutableArrayRef<int> LoMask = Mask.slice(0, 8);
8052 MutableArrayRef<int> HiMask = Mask.slice(8, 8);
8054 // For single-input shuffles, there are some nicer lowering tricks we can use.
8055 if (isSingleInputShuffleMask(Mask)) {
8056 // Check whether we can widen this to an i16 shuffle by duplicating bytes.
8057 // Notably, this handles splat and partial-splat shuffles more efficiently.
8058 // However, it only makes sense if the pre-duplication shuffle simplifies
8059 // things significantly. Currently, this means we need to be able to
8060 // express the pre-duplication shuffle as an i16 shuffle.
8062 // FIXME: We should check for other patterns which can be widened into an
8063 // i16 shuffle as well.
8064 auto canWidenViaDuplication = [](ArrayRef<int> Mask) {
8065 for (int i = 0; i < 16; i += 2) {
8066 if (Mask[i] != Mask[i + 1])
8071 auto tryToWidenViaDuplication = [&]() -> SDValue {
8072 if (!canWidenViaDuplication(Mask))
8074 SmallVector<int, 4> LoInputs;
8075 std::copy_if(Mask.begin(), Mask.end(), std::back_inserter(LoInputs),
8076 [](int M) { return M >= 0 && M < 8; });
8077 std::sort(LoInputs.begin(), LoInputs.end());
8078 LoInputs.erase(std::unique(LoInputs.begin(), LoInputs.end()),
8080 SmallVector<int, 4> HiInputs;
8081 std::copy_if(Mask.begin(), Mask.end(), std::back_inserter(HiInputs),
8082 [](int M) { return M >= 8; });
8083 std::sort(HiInputs.begin(), HiInputs.end());
8084 HiInputs.erase(std::unique(HiInputs.begin(), HiInputs.end()),
8087 bool TargetLo = LoInputs.size() >= HiInputs.size();
8088 ArrayRef<int> InPlaceInputs = TargetLo ? LoInputs : HiInputs;
8089 ArrayRef<int> MovingInputs = TargetLo ? HiInputs : LoInputs;
8091 int PreDupI16Shuffle[] = {-1, -1, -1, -1, -1, -1, -1, -1};
8092 SmallDenseMap<int, int, 8> LaneMap;
8093 for (int I : InPlaceInputs) {
8094 PreDupI16Shuffle[I/2] = I/2;
8097 int j = TargetLo ? 0 : 4, je = j + 4;
8098 for (int i = 0, ie = MovingInputs.size(); i < ie; ++i) {
8099 // Check if j is already a shuffle of this input. This happens when
8100 // there are two adjacent bytes after we move the low one.
8101 if (PreDupI16Shuffle[j] != MovingInputs[i] / 2) {
8102 // If we haven't yet mapped the input, search for a slot into which
8104 while (j < je && PreDupI16Shuffle[j] != -1)
8108 // We can't place the inputs into a single half with a simple i16 shuffle, so bail.
8111 // Map this input with the i16 shuffle.
8112 PreDupI16Shuffle[j] = MovingInputs[i] / 2;
8115 // Update the lane map based on the mapping we ended up with.
8116 LaneMap[MovingInputs[i]] = 2 * j + MovingInputs[i] % 2;
8119 ISD::BITCAST, DL, MVT::v16i8,
8120 DAG.getVectorShuffle(MVT::v8i16, DL,
8121 DAG.getNode(ISD::BITCAST, DL, MVT::v8i16, V1),
8122 DAG.getUNDEF(MVT::v8i16), PreDupI16Shuffle));
8124 // Unpack the bytes to form the i16s that will be shuffled into place.
8125 V1 = DAG.getNode(TargetLo ? X86ISD::UNPCKL : X86ISD::UNPCKH, DL,
8126 MVT::v16i8, V1, V1);
8128 int PostDupI16Shuffle[8] = {-1, -1, -1, -1, -1, -1, -1, -1};
8129 for (int i = 0; i < 16; i += 2) {
8131 PostDupI16Shuffle[i / 2] = LaneMap[Mask[i]] - (TargetLo ? 0 : 8);
8132 assert(PostDupI16Shuffle[i / 2] < 8 && "Invalid v8 shuffle mask!");
8135 ISD::BITCAST, DL, MVT::v16i8,
8136 DAG.getVectorShuffle(MVT::v8i16, DL,
8137 DAG.getNode(ISD::BITCAST, DL, MVT::v8i16, V1),
8138 DAG.getUNDEF(MVT::v8i16), PostDupI16Shuffle));
8140 if (SDValue V = tryToWidenViaDuplication())
8144 // Check whether an interleaving lowering is likely to be more efficient.
8145 // This isn't perfect but it is a strong heuristic that tends to work well on
8146 // the kinds of shuffles that show up in practice.
8148 // FIXME: We need to handle other interleaving widths (i16, i32, ...).
8149 if (shouldLowerAsInterleaving(Mask)) {
8150 // FIXME: Figure out whether we should pack these into the low or high
8153 int EMask[16], OMask[16];
8154 for (int i = 0; i < 8; ++i) {
8155 EMask[i] = Mask[2*i];
8156 OMask[i] = Mask[2*i + 1];
8161 SDValue Evens = DAG.getVectorShuffle(MVT::v16i8, DL, V1, V2, EMask);
8162 SDValue Odds = DAG.getVectorShuffle(MVT::v16i8, DL, V1, V2, OMask);
8164 return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v16i8, Evens, Odds);
8167 // Check for SSSE3 which lets us lower all v16i8 shuffles much more directly
8168 // with PSHUFB. It is important to do this before we attempt to generate any
8169 // blends but after all of the single-input lowerings. If the single input
8170 // lowerings can find an instruction sequence that is faster than a PSHUFB, we
8171 // want to preserve that and we can DAG combine any longer sequences into
8172 // a PSHUFB in the end. But once we start blending from multiple inputs,
8173 // the complexity of DAG combining bad patterns back into PSHUFB is too high,
8174 // and there are *very* few patterns that would actually be faster than the
8175 // PSHUFB approach because of its ability to zero lanes.
8177 // FIXME: The only exceptions to the above are blends which are exact
8178 // interleavings with direct instructions supporting them. We currently don't
8179 // handle those well here.
8180 if (Subtarget->hasSSSE3()) {
8183 for (int i = 0; i < 16; ++i)
8184 if (Mask[i] == -1) {
8185 V1Mask[i] = V2Mask[i] = DAG.getConstant(0x80, MVT::i8);
8187 V1Mask[i] = DAG.getConstant(Mask[i] < 16 ? Mask[i] : 0x80, MVT::i8);
8189 DAG.getConstant(Mask[i] < 16 ? 0x80 : Mask[i] - 16, MVT::i8);
8191 V1 = DAG.getNode(X86ISD::PSHUFB, DL, MVT::v16i8, V1,
8192 DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v16i8, V1Mask));
8193 if (isSingleInputShuffleMask(Mask))
8194 return V1; // Single inputs are easy.
8196 // Otherwise, blend the two.
8197 V2 = DAG.getNode(X86ISD::PSHUFB, DL, MVT::v16i8, V2,
8198 DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v16i8, V2Mask));
8199 return DAG.getNode(ISD::OR, DL, MVT::v16i8, V1, V2);
8202 // Check whether a compaction lowering can be done. This handles shuffles
8203 // which take every Nth element for some even N. See the helper function for
8206 // We special case these as they can be particularly efficiently handled with
8207 // the PACKUSB instruction on x86 and they show up in common patterns of
8208 // rearranging bytes to truncate wide elements.
8209 if (int NumEvenDrops = canLowerByDroppingEvenElements(Mask)) {
8210 // NumEvenDrops is the power of two stride of the elements. Another way of
8211 // thinking about it is that we need to drop the even elements this many
8212 // times to get the original input.
8213 bool IsSingleInput = isSingleInputShuffleMask(Mask);
8215 // First we need to zero all the dropped bytes.
8216 assert(NumEvenDrops <= 3 &&
8217 "No support for dropping even elements more than 3 times.");
8218 // We use the mask type to pick which bytes are preserved based on how many
8219 // elements are dropped.
8220 MVT MaskVTs[] = { MVT::v8i16, MVT::v4i32, MVT::v2i64 };
8221 SDValue ByteClearMask =
8222 DAG.getNode(ISD::BITCAST, DL, MVT::v16i8,
8223 DAG.getConstant(0xFF, MaskVTs[NumEvenDrops - 1]));
8224 V1 = DAG.getNode(ISD::AND, DL, MVT::v16i8, V1, ByteClearMask);
8226 V2 = DAG.getNode(ISD::AND, DL, MVT::v16i8, V2, ByteClearMask);
8228 // Now pack things back together.
8229 V1 = DAG.getNode(ISD::BITCAST, DL, MVT::v8i16, V1);
8230 V2 = IsSingleInput ? V1 : DAG.getNode(ISD::BITCAST, DL, MVT::v8i16, V2);
8231 SDValue Result = DAG.getNode(X86ISD::PACKUS, DL, MVT::v16i8, V1, V2);
8232 for (int i = 1; i < NumEvenDrops; ++i) {
8233 Result = DAG.getNode(ISD::BITCAST, DL, MVT::v8i16, Result);
8234 Result = DAG.getNode(X86ISD::PACKUS, DL, MVT::v16i8, Result, Result);
8240 int V1LoBlendMask[8] = {-1, -1, -1, -1, -1, -1, -1, -1};
8241 int V1HiBlendMask[8] = {-1, -1, -1, -1, -1, -1, -1, -1};
8242 int V2LoBlendMask[8] = {-1, -1, -1, -1, -1, -1, -1, -1};
8243 int V2HiBlendMask[8] = {-1, -1, -1, -1, -1, -1, -1, -1};
8245 auto buildBlendMasks = [](MutableArrayRef<int> HalfMask,
8246 MutableArrayRef<int> V1HalfBlendMask,
8247 MutableArrayRef<int> V2HalfBlendMask) {
8248 for (int i = 0; i < 8; ++i)
8249 if (HalfMask[i] >= 0 && HalfMask[i] < 16) {
8250 V1HalfBlendMask[i] = HalfMask[i];
8252 } else if (HalfMask[i] >= 16) {
8253 V2HalfBlendMask[i] = HalfMask[i] - 16;
8254 HalfMask[i] = i + 8;
8257 buildBlendMasks(LoMask, V1LoBlendMask, V2LoBlendMask);
8258 buildBlendMasks(HiMask, V1HiBlendMask, V2HiBlendMask);
8260 SDValue Zero = getZeroVector(MVT::v8i16, Subtarget, DAG, DL);
8262 auto buildLoAndHiV8s = [&](SDValue V, MutableArrayRef<int> LoBlendMask,
8263 MutableArrayRef<int> HiBlendMask) {
8265 // Check if any of the odd lanes in the v16i8 are used. If not, we can mask
8266 // them out and avoid using UNPCK{L,H} to extract the elements of V as
8268 if (std::none_of(LoBlendMask.begin(), LoBlendMask.end(),
8269 [](int M) { return M >= 0 && M % 2 == 1; }) &&
8270 std::none_of(HiBlendMask.begin(), HiBlendMask.end(),
8271 [](int M) { return M >= 0 && M % 2 == 1; })) {
8272 // Use a mask to drop the high bytes.
8273 V1 = DAG.getNode(ISD::BITCAST, DL, MVT::v8i16, V);
8274 V1 = DAG.getNode(ISD::AND, DL, MVT::v8i16, V1,
8275 DAG.getConstant(0x00FF, MVT::v8i16));
8277 // This will be a single vector shuffle instead of a blend so nuke V2.
8278 V2 = DAG.getUNDEF(MVT::v8i16);
8280 // Squash the masks to point directly into V1.
8281 for (int &M : LoBlendMask)
8284 for (int &M : HiBlendMask)
8288 // Otherwise just unpack the low half of V into V1 and the high half into
8289 // V2 so that we can blend them as i16s.
8290 V1 = DAG.getNode(ISD::BITCAST, DL, MVT::v8i16,
8291 DAG.getNode(X86ISD::UNPCKL, DL, MVT::v16i8, V, Zero));
8292 V2 = DAG.getNode(ISD::BITCAST, DL, MVT::v8i16,
8293 DAG.getNode(X86ISD::UNPCKH, DL, MVT::v16i8, V, Zero));
8296 SDValue BlendedLo = DAG.getVectorShuffle(MVT::v8i16, DL, V1, V2, LoBlendMask);
8297 SDValue BlendedHi = DAG.getVectorShuffle(MVT::v8i16, DL, V1, V2, HiBlendMask);
8298 return std::make_pair(BlendedLo, BlendedHi);
8300 SDValue V1Lo, V1Hi, V2Lo, V2Hi;
8301 std::tie(V1Lo, V1Hi) = buildLoAndHiV8s(V1, V1LoBlendMask, V1HiBlendMask);
8302 std::tie(V2Lo, V2Hi) = buildLoAndHiV8s(V2, V2LoBlendMask, V2HiBlendMask);
8304 SDValue LoV = DAG.getVectorShuffle(MVT::v8i16, DL, V1Lo, V2Lo, LoMask);
8305 SDValue HiV = DAG.getVectorShuffle(MVT::v8i16, DL, V1Hi, V2Hi, HiMask);
8307 return DAG.getNode(X86ISD::PACKUS, DL, MVT::v16i8, LoV, HiV);
8310 /// \brief Dispatching routine to lower various 128-bit x86 vector shuffles.
8312 /// This routine breaks down the specific type of 128-bit shuffle and
8313 /// dispatches to the lowering routines accordingly.
8314 static SDValue lower128BitVectorShuffle(SDValue Op, SDValue V1, SDValue V2,
8315 MVT VT, const X86Subtarget *Subtarget,
8316 SelectionDAG &DAG) {
8317 switch (VT.SimpleTy) {
8319 return lowerV2I64VectorShuffle(Op, V1, V2, Subtarget, DAG);
8321 return lowerV2F64VectorShuffle(Op, V1, V2, Subtarget, DAG);
8323 return lowerV4I32VectorShuffle(Op, V1, V2, Subtarget, DAG);
8325 return lowerV4F32VectorShuffle(Op, V1, V2, Subtarget, DAG);
8327 return lowerV8I16VectorShuffle(Op, V1, V2, Subtarget, DAG);
8329 return lowerV16I8VectorShuffle(Op, V1, V2, Subtarget, DAG);
8332 llvm_unreachable("Unimplemented!");
8336 /// \brief Tiny helper function to test whether a shuffle mask could be
8337 /// simplified by widening the elements being shuffled.
8338 static bool canWidenShuffleElements(ArrayRef<int> Mask) {
8339 for (int i = 0, Size = Mask.size(); i < Size; i += 2)
8340 if (Mask[i] % 2 != 0 || Mask[i] + 1 != Mask[i+1])
8346 /// \brief Top-level lowering for x86 vector shuffles.
8348 /// This handles decomposition, canonicalization, and lowering of all x86
8349 /// vector shuffles. Most of the specific lowering strategies are encapsulated
8350 /// above in helper routines. The canonicalization attempts to widen shuffles
8351 /// to involve fewer lanes of wider elements, consolidate symmetric patterns
8352 /// s.t. only one of the two inputs needs to be tested, etc.
8353 static SDValue lowerVectorShuffle(SDValue Op, const X86Subtarget *Subtarget,
8354 SelectionDAG &DAG) {
8355 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
8356 ArrayRef<int> Mask = SVOp->getMask();
8357 SDValue V1 = Op.getOperand(0);
8358 SDValue V2 = Op.getOperand(1);
8359 MVT VT = Op.getSimpleValueType();
8360 int NumElements = VT.getVectorNumElements();
8363 assert(VT.getSizeInBits() != 64 && "Can't lower MMX shuffles");
8365 bool V1IsUndef = V1.getOpcode() == ISD::UNDEF;
8366 bool V2IsUndef = V2.getOpcode() == ISD::UNDEF;
8367 if (V1IsUndef && V2IsUndef)
8368 return DAG.getUNDEF(VT);
8370 // When we create a shuffle node we put the UNDEF node to second operand,
8371 // but in some cases the first operand may be transformed to UNDEF.
8372 // In this case we should just commute the node.
8374 return DAG.getCommutedVectorShuffle(*SVOp);
8376 // Check for non-undef masks pointing at an undef vector and make the masks
8377 // undef as well. This makes it easier to match the shuffle based solely on
8381 if (M >= NumElements) {
8382 SmallVector<int, 8> NewMask(Mask.begin(), Mask.end());
8383 for (int &M : NewMask)
8384 if (M >= NumElements)
8386 return DAG.getVectorShuffle(VT, dl, V1, V2, NewMask);
8389 // For integer vector shuffles, try to collapse them into a shuffle of fewer
8390 // lanes but wider integers. We cap this to not form integers larger than i64
8391 // but it might be interesting to form i128 integers to handle flipping the
8392 // low and high halves of AVX 256-bit vectors.
8393 if (VT.isInteger() && VT.getScalarSizeInBits() < 64 &&
8394 canWidenShuffleElements(Mask)) {
8395 SmallVector<int, 8> NewMask;
8396 for (int i = 0, Size = Mask.size(); i < Size; i += 2)
8397 NewMask.push_back(Mask[i] / 2);
8399 MVT::getVectorVT(MVT::getIntegerVT(VT.getScalarSizeInBits() * 2),
8400 VT.getVectorNumElements() / 2);
8401 V1 = DAG.getNode(ISD::BITCAST, dl, NewVT, V1);
8402 V2 = DAG.getNode(ISD::BITCAST, dl, NewVT, V2);
8403 return DAG.getNode(ISD::BITCAST, dl, VT,
8404 DAG.getVectorShuffle(NewVT, dl, V1, V2, NewMask));
8407 int NumV1Elements = 0, NumUndefElements = 0, NumV2Elements = 0;
8408 for (int M : SVOp->getMask())
8411 else if (M < NumElements)
8416 // Commute the shuffle as needed such that more elements come from V1 than
8417 // V2. This allows us to match the shuffle pattern strictly on how many
8418 // elements come from V1 without handling the symmetric cases.
8419 if (NumV2Elements > NumV1Elements)
8420 return DAG.getCommutedVectorShuffle(*SVOp);
8422 // When the number of V1 and V2 elements are the same, try to minimize the
8423 // number of uses of V2 in the low half of the vector.
8424 if (NumV1Elements == NumV2Elements) {
8425 int LowV1Elements = 0, LowV2Elements = 0;
8426 for (int M : SVOp->getMask().slice(0, NumElements / 2))
8427 if (M >= NumElements)
8431 if (LowV2Elements > LowV1Elements)
8432 return DAG.getCommutedVectorShuffle(*SVOp);
8435 // For each vector width, delegate to a specialized lowering routine.
8436 if (VT.getSizeInBits() == 128)
8437 return lower128BitVectorShuffle(Op, V1, V2, VT, Subtarget, DAG);
8439 llvm_unreachable("Unimplemented!");
8443 //===----------------------------------------------------------------------===//
8444 // Legacy vector shuffle lowering
8446 // This code is the legacy code handling vector shuffles until the above
8447 // replaces its functionality and performance.
8448 //===----------------------------------------------------------------------===//
8450 static bool isBlendMask(ArrayRef<int> MaskVals, MVT VT, bool hasSSE41,
8451 bool hasInt256, unsigned *MaskOut = nullptr) {
8452 MVT EltVT = VT.getVectorElementType();
8454 // There is no blend with immediate in AVX-512.
8455 if (VT.is512BitVector())
8458 if (!hasSSE41 || EltVT == MVT::i8)
8460 if (!hasInt256 && VT == MVT::v16i16)
8463 unsigned MaskValue = 0;
8464 unsigned NumElems = VT.getVectorNumElements();
8465 // There are 2 lanes if (NumElems > 8), and 1 lane otherwise.
8466 unsigned NumLanes = (NumElems - 1) / 8 + 1;
8467 unsigned NumElemsInLane = NumElems / NumLanes;
8469 // Blend for v16i16 should be symetric for the both lanes.
8470 for (unsigned i = 0; i < NumElemsInLane; ++i) {
8472 int SndLaneEltIdx = (NumLanes == 2) ? MaskVals[i + NumElemsInLane] : -1;
8473 int EltIdx = MaskVals[i];
8475 if ((EltIdx < 0 || EltIdx == (int)i) &&
8476 (SndLaneEltIdx < 0 || SndLaneEltIdx == (int)(i + NumElemsInLane)))
8479 if (((unsigned)EltIdx == (i + NumElems)) &&
8480 (SndLaneEltIdx < 0 ||
8481 (unsigned)SndLaneEltIdx == i + NumElems + NumElemsInLane))
8482 MaskValue |= (1 << i);
8488 *MaskOut = MaskValue;
8492 // Try to lower a shuffle node into a simple blend instruction.
8493 // This function assumes isBlendMask returns true for this
8494 // SuffleVectorSDNode
8495 static SDValue LowerVECTOR_SHUFFLEtoBlend(ShuffleVectorSDNode *SVOp,
8497 const X86Subtarget *Subtarget,
8498 SelectionDAG &DAG) {
8499 MVT VT = SVOp->getSimpleValueType(0);
8500 MVT EltVT = VT.getVectorElementType();
8501 assert(isBlendMask(SVOp->getMask(), VT, Subtarget->hasSSE41(),
8502 Subtarget->hasInt256() && "Trying to lower a "
8503 "VECTOR_SHUFFLE to a Blend but "
8504 "with the wrong mask"));
8505 SDValue V1 = SVOp->getOperand(0);
8506 SDValue V2 = SVOp->getOperand(1);
8508 unsigned NumElems = VT.getVectorNumElements();
8510 // Convert i32 vectors to floating point if it is not AVX2.
8511 // AVX2 introduced VPBLENDD instruction for 128 and 256-bit vectors.
8513 if (EltVT == MVT::i64 || (EltVT == MVT::i32 && !Subtarget->hasInt256())) {
8514 BlendVT = MVT::getVectorVT(MVT::getFloatingPointVT(EltVT.getSizeInBits()),
8516 V1 = DAG.getNode(ISD::BITCAST, dl, VT, V1);
8517 V2 = DAG.getNode(ISD::BITCAST, dl, VT, V2);
8520 SDValue Ret = DAG.getNode(X86ISD::BLENDI, dl, BlendVT, V1, V2,
8521 DAG.getConstant(MaskValue, MVT::i32));
8522 return DAG.getNode(ISD::BITCAST, dl, VT, Ret);
8525 /// In vector type \p VT, return true if the element at index \p InputIdx
8526 /// falls on a different 128-bit lane than \p OutputIdx.
8527 static bool ShuffleCrosses128bitLane(MVT VT, unsigned InputIdx,
8528 unsigned OutputIdx) {
8529 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
8530 return InputIdx * EltSize / 128 != OutputIdx * EltSize / 128;
8533 /// Generate a PSHUFB if possible. Selects elements from \p V1 according to
8534 /// \p MaskVals. MaskVals[OutputIdx] = InputIdx specifies that we want to
8535 /// shuffle the element at InputIdx in V1 to OutputIdx in the result. If \p
8536 /// MaskVals refers to elements outside of \p V1 or is undef (-1), insert a
8538 static SDValue getPSHUFB(ArrayRef<int> MaskVals, SDValue V1, SDLoc &dl,
8539 SelectionDAG &DAG) {
8540 MVT VT = V1.getSimpleValueType();
8541 assert(VT.is128BitVector() || VT.is256BitVector());
8543 MVT EltVT = VT.getVectorElementType();
8544 unsigned EltSizeInBytes = EltVT.getSizeInBits() / 8;
8545 unsigned NumElts = VT.getVectorNumElements();
8547 SmallVector<SDValue, 32> PshufbMask;
8548 for (unsigned OutputIdx = 0; OutputIdx < NumElts; ++OutputIdx) {
8549 int InputIdx = MaskVals[OutputIdx];
8550 unsigned InputByteIdx;
8552 if (InputIdx < 0 || NumElts <= (unsigned)InputIdx)
8553 InputByteIdx = 0x80;
8555 // Cross lane is not allowed.
8556 if (ShuffleCrosses128bitLane(VT, InputIdx, OutputIdx))
8558 InputByteIdx = InputIdx * EltSizeInBytes;
8559 // Index is an byte offset within the 128-bit lane.
8560 InputByteIdx &= 0xf;
8563 for (unsigned j = 0; j < EltSizeInBytes; ++j) {
8564 PshufbMask.push_back(DAG.getConstant(InputByteIdx, MVT::i8));
8565 if (InputByteIdx != 0x80)
8570 MVT ShufVT = MVT::getVectorVT(MVT::i8, PshufbMask.size());
8572 V1 = DAG.getNode(ISD::BITCAST, dl, ShufVT, V1);
8573 return DAG.getNode(X86ISD::PSHUFB, dl, ShufVT, V1,
8574 DAG.getNode(ISD::BUILD_VECTOR, dl, ShufVT, PshufbMask));
8577 // v8i16 shuffles - Prefer shuffles in the following order:
8578 // 1. [all] pshuflw, pshufhw, optional move
8579 // 2. [ssse3] 1 x pshufb
8580 // 3. [ssse3] 2 x pshufb + 1 x por
8581 // 4. [all] mov + pshuflw + pshufhw + N x (pextrw + pinsrw)
8583 LowerVECTOR_SHUFFLEv8i16(SDValue Op, const X86Subtarget *Subtarget,
8584 SelectionDAG &DAG) {
8585 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
8586 SDValue V1 = SVOp->getOperand(0);
8587 SDValue V2 = SVOp->getOperand(1);
8589 SmallVector<int, 8> MaskVals;
8591 // Determine if more than 1 of the words in each of the low and high quadwords
8592 // of the result come from the same quadword of one of the two inputs. Undef
8593 // mask values count as coming from any quadword, for better codegen.
8595 // Lo/HiQuad[i] = j indicates how many words from the ith quad of the input
8596 // feeds this quad. For i, 0 and 1 refer to V1, 2 and 3 refer to V2.
8597 unsigned LoQuad[] = { 0, 0, 0, 0 };
8598 unsigned HiQuad[] = { 0, 0, 0, 0 };
8599 // Indices of quads used.
8600 std::bitset<4> InputQuads;
8601 for (unsigned i = 0; i < 8; ++i) {
8602 unsigned *Quad = i < 4 ? LoQuad : HiQuad;
8603 int EltIdx = SVOp->getMaskElt(i);
8604 MaskVals.push_back(EltIdx);
8613 InputQuads.set(EltIdx / 4);
8616 int BestLoQuad = -1;
8617 unsigned MaxQuad = 1;
8618 for (unsigned i = 0; i < 4; ++i) {
8619 if (LoQuad[i] > MaxQuad) {
8621 MaxQuad = LoQuad[i];
8625 int BestHiQuad = -1;
8627 for (unsigned i = 0; i < 4; ++i) {
8628 if (HiQuad[i] > MaxQuad) {
8630 MaxQuad = HiQuad[i];
8634 // For SSSE3, If all 8 words of the result come from only 1 quadword of each
8635 // of the two input vectors, shuffle them into one input vector so only a
8636 // single pshufb instruction is necessary. If there are more than 2 input
8637 // quads, disable the next transformation since it does not help SSSE3.
8638 bool V1Used = InputQuads[0] || InputQuads[1];
8639 bool V2Used = InputQuads[2] || InputQuads[3];
8640 if (Subtarget->hasSSSE3()) {
8641 if (InputQuads.count() == 2 && V1Used && V2Used) {
8642 BestLoQuad = InputQuads[0] ? 0 : 1;
8643 BestHiQuad = InputQuads[2] ? 2 : 3;
8645 if (InputQuads.count() > 2) {
8651 // If BestLoQuad or BestHiQuad are set, shuffle the quads together and update
8652 // the shuffle mask. If a quad is scored as -1, that means that it contains
8653 // words from all 4 input quadwords.
8655 if (BestLoQuad >= 0 || BestHiQuad >= 0) {
8657 BestLoQuad < 0 ? 0 : BestLoQuad,
8658 BestHiQuad < 0 ? 1 : BestHiQuad
8660 NewV = DAG.getVectorShuffle(MVT::v2i64, dl,
8661 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V1),
8662 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V2), &MaskV[0]);
8663 NewV = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, NewV);
8665 // Rewrite the MaskVals and assign NewV to V1 if NewV now contains all the
8666 // source words for the shuffle, to aid later transformations.
8667 bool AllWordsInNewV = true;
8668 bool InOrder[2] = { true, true };
8669 for (unsigned i = 0; i != 8; ++i) {
8670 int idx = MaskVals[i];
8672 InOrder[i/4] = false;
8673 if (idx < 0 || (idx/4) == BestLoQuad || (idx/4) == BestHiQuad)
8675 AllWordsInNewV = false;
8679 bool pshuflw = AllWordsInNewV, pshufhw = AllWordsInNewV;
8680 if (AllWordsInNewV) {
8681 for (int i = 0; i != 8; ++i) {
8682 int idx = MaskVals[i];
8685 idx = MaskVals[i] = (idx / 4) == BestLoQuad ? (idx & 3) : (idx & 3) + 4;
8686 if ((idx != i) && idx < 4)
8688 if ((idx != i) && idx > 3)
8697 // If we've eliminated the use of V2, and the new mask is a pshuflw or
8698 // pshufhw, that's as cheap as it gets. Return the new shuffle.
8699 if ((pshufhw && InOrder[0]) || (pshuflw && InOrder[1])) {
8700 unsigned Opc = pshufhw ? X86ISD::PSHUFHW : X86ISD::PSHUFLW;
8701 unsigned TargetMask = 0;
8702 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV,
8703 DAG.getUNDEF(MVT::v8i16), &MaskVals[0]);
8704 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(NewV.getNode());
8705 TargetMask = pshufhw ? getShufflePSHUFHWImmediate(SVOp):
8706 getShufflePSHUFLWImmediate(SVOp);
8707 V1 = NewV.getOperand(0);
8708 return getTargetShuffleNode(Opc, dl, MVT::v8i16, V1, TargetMask, DAG);
8712 // Promote splats to a larger type which usually leads to more efficient code.
8713 // FIXME: Is this true if pshufb is available?
8714 if (SVOp->isSplat())
8715 return PromoteSplat(SVOp, DAG);
8717 // If we have SSSE3, and all words of the result are from 1 input vector,
8718 // case 2 is generated, otherwise case 3 is generated. If no SSSE3
8719 // is present, fall back to case 4.
8720 if (Subtarget->hasSSSE3()) {
8721 SmallVector<SDValue,16> pshufbMask;
8723 // If we have elements from both input vectors, set the high bit of the
8724 // shuffle mask element to zero out elements that come from V2 in the V1
8725 // mask, and elements that come from V1 in the V2 mask, so that the two
8726 // results can be OR'd together.
8727 bool TwoInputs = V1Used && V2Used;
8728 V1 = getPSHUFB(MaskVals, V1, dl, DAG);
8730 return DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
8732 // Calculate the shuffle mask for the second input, shuffle it, and
8733 // OR it with the first shuffled input.
8734 CommuteVectorShuffleMask(MaskVals, 8);
8735 V2 = getPSHUFB(MaskVals, V2, dl, DAG);
8736 V1 = DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
8737 return DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
8740 // If BestLoQuad >= 0, generate a pshuflw to put the low elements in order,
8741 // and update MaskVals with new element order.
8742 std::bitset<8> InOrder;
8743 if (BestLoQuad >= 0) {
8744 int MaskV[] = { -1, -1, -1, -1, 4, 5, 6, 7 };
8745 for (int i = 0; i != 4; ++i) {
8746 int idx = MaskVals[i];
8749 } else if ((idx / 4) == BestLoQuad) {
8754 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV, DAG.getUNDEF(MVT::v8i16),
8757 if (NewV.getOpcode() == ISD::VECTOR_SHUFFLE && Subtarget->hasSSE2()) {
8758 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(NewV.getNode());
8759 NewV = getTargetShuffleNode(X86ISD::PSHUFLW, dl, MVT::v8i16,
8761 getShufflePSHUFLWImmediate(SVOp), DAG);
8765 // If BestHi >= 0, generate a pshufhw to put the high elements in order,
8766 // and update MaskVals with the new element order.
8767 if (BestHiQuad >= 0) {
8768 int MaskV[] = { 0, 1, 2, 3, -1, -1, -1, -1 };
8769 for (unsigned i = 4; i != 8; ++i) {
8770 int idx = MaskVals[i];
8773 } else if ((idx / 4) == BestHiQuad) {
8774 MaskV[i] = (idx & 3) + 4;
8778 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV, DAG.getUNDEF(MVT::v8i16),
8781 if (NewV.getOpcode() == ISD::VECTOR_SHUFFLE && Subtarget->hasSSE2()) {
8782 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(NewV.getNode());
8783 NewV = getTargetShuffleNode(X86ISD::PSHUFHW, dl, MVT::v8i16,
8785 getShufflePSHUFHWImmediate(SVOp), DAG);
8789 // In case BestHi & BestLo were both -1, which means each quadword has a word
8790 // from each of the four input quadwords, calculate the InOrder bitvector now
8791 // before falling through to the insert/extract cleanup.
8792 if (BestLoQuad == -1 && BestHiQuad == -1) {
8794 for (int i = 0; i != 8; ++i)
8795 if (MaskVals[i] < 0 || MaskVals[i] == i)
8799 // The other elements are put in the right place using pextrw and pinsrw.
8800 for (unsigned i = 0; i != 8; ++i) {
8803 int EltIdx = MaskVals[i];
8806 SDValue ExtOp = (EltIdx < 8) ?
8807 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V1,
8808 DAG.getIntPtrConstant(EltIdx)) :
8809 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V2,
8810 DAG.getIntPtrConstant(EltIdx - 8));
8811 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, ExtOp,
8812 DAG.getIntPtrConstant(i));
8817 /// \brief v16i16 shuffles
8819 /// FIXME: We only support generation of a single pshufb currently. We can
8820 /// generalize the other applicable cases from LowerVECTOR_SHUFFLEv8i16 as
8821 /// well (e.g 2 x pshufb + 1 x por).
8823 LowerVECTOR_SHUFFLEv16i16(SDValue Op, SelectionDAG &DAG) {
8824 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
8825 SDValue V1 = SVOp->getOperand(0);
8826 SDValue V2 = SVOp->getOperand(1);
8829 if (V2.getOpcode() != ISD::UNDEF)
8832 SmallVector<int, 16> MaskVals(SVOp->getMask().begin(), SVOp->getMask().end());
8833 return getPSHUFB(MaskVals, V1, dl, DAG);
8836 // v16i8 shuffles - Prefer shuffles in the following order:
8837 // 1. [ssse3] 1 x pshufb
8838 // 2. [ssse3] 2 x pshufb + 1 x por
8839 // 3. [all] v8i16 shuffle + N x pextrw + rotate + pinsrw
8840 static SDValue LowerVECTOR_SHUFFLEv16i8(ShuffleVectorSDNode *SVOp,
8841 const X86Subtarget* Subtarget,
8842 SelectionDAG &DAG) {
8843 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
8844 SDValue V1 = SVOp->getOperand(0);
8845 SDValue V2 = SVOp->getOperand(1);
8847 ArrayRef<int> MaskVals = SVOp->getMask();
8849 // Promote splats to a larger type which usually leads to more efficient code.
8850 // FIXME: Is this true if pshufb is available?
8851 if (SVOp->isSplat())
8852 return PromoteSplat(SVOp, DAG);
8854 // If we have SSSE3, case 1 is generated when all result bytes come from
8855 // one of the inputs. Otherwise, case 2 is generated. If no SSSE3 is
8856 // present, fall back to case 3.
8858 // If SSSE3, use 1 pshufb instruction per vector with elements in the result.
8859 if (Subtarget->hasSSSE3()) {
8860 SmallVector<SDValue,16> pshufbMask;
8862 // If all result elements are from one input vector, then only translate
8863 // undef mask values to 0x80 (zero out result) in the pshufb mask.
8865 // Otherwise, we have elements from both input vectors, and must zero out
8866 // elements that come from V2 in the first mask, and V1 in the second mask
8867 // so that we can OR them together.
8868 for (unsigned i = 0; i != 16; ++i) {
8869 int EltIdx = MaskVals[i];
8870 if (EltIdx < 0 || EltIdx >= 16)
8872 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
8874 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
8875 DAG.getNode(ISD::BUILD_VECTOR, dl,
8876 MVT::v16i8, pshufbMask));
8878 // As PSHUFB will zero elements with negative indices, it's safe to ignore
8879 // the 2nd operand if it's undefined or zero.
8880 if (V2.getOpcode() == ISD::UNDEF ||
8881 ISD::isBuildVectorAllZeros(V2.getNode()))
8884 // Calculate the shuffle mask for the second input, shuffle it, and
8885 // OR it with the first shuffled input.
8887 for (unsigned i = 0; i != 16; ++i) {
8888 int EltIdx = MaskVals[i];
8889 EltIdx = (EltIdx < 16) ? 0x80 : EltIdx - 16;
8890 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
8892 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
8893 DAG.getNode(ISD::BUILD_VECTOR, dl,
8894 MVT::v16i8, pshufbMask));
8895 return DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
8898 // No SSSE3 - Calculate in place words and then fix all out of place words
8899 // With 0-16 extracts & inserts. Worst case is 16 bytes out of order from
8900 // the 16 different words that comprise the two doublequadword input vectors.
8901 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
8902 V2 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V2);
8904 for (int i = 0; i != 8; ++i) {
8905 int Elt0 = MaskVals[i*2];
8906 int Elt1 = MaskVals[i*2+1];
8908 // This word of the result is all undef, skip it.
8909 if (Elt0 < 0 && Elt1 < 0)
8912 // This word of the result is already in the correct place, skip it.
8913 if ((Elt0 == i*2) && (Elt1 == i*2+1))
8916 SDValue Elt0Src = Elt0 < 16 ? V1 : V2;
8917 SDValue Elt1Src = Elt1 < 16 ? V1 : V2;
8920 // If Elt0 and Elt1 are defined, are consecutive, and can be load
8921 // using a single extract together, load it and store it.
8922 if ((Elt0 >= 0) && ((Elt0 + 1) == Elt1) && ((Elt0 & 1) == 0)) {
8923 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
8924 DAG.getIntPtrConstant(Elt1 / 2));
8925 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
8926 DAG.getIntPtrConstant(i));
8930 // If Elt1 is defined, extract it from the appropriate source. If the
8931 // source byte is not also odd, shift the extracted word left 8 bits
8932 // otherwise clear the bottom 8 bits if we need to do an or.
8934 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
8935 DAG.getIntPtrConstant(Elt1 / 2));
8936 if ((Elt1 & 1) == 0)
8937 InsElt = DAG.getNode(ISD::SHL, dl, MVT::i16, InsElt,
8939 TLI.getShiftAmountTy(InsElt.getValueType())));
8941 InsElt = DAG.getNode(ISD::AND, dl, MVT::i16, InsElt,
8942 DAG.getConstant(0xFF00, MVT::i16));
8944 // If Elt0 is defined, extract it from the appropriate source. If the
8945 // source byte is not also even, shift the extracted word right 8 bits. If
8946 // Elt1 was also defined, OR the extracted values together before
8947 // inserting them in the result.
8949 SDValue InsElt0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16,
8950 Elt0Src, DAG.getIntPtrConstant(Elt0 / 2));
8951 if ((Elt0 & 1) != 0)
8952 InsElt0 = DAG.getNode(ISD::SRL, dl, MVT::i16, InsElt0,
8954 TLI.getShiftAmountTy(InsElt0.getValueType())));
8956 InsElt0 = DAG.getNode(ISD::AND, dl, MVT::i16, InsElt0,
8957 DAG.getConstant(0x00FF, MVT::i16));
8958 InsElt = Elt1 >= 0 ? DAG.getNode(ISD::OR, dl, MVT::i16, InsElt, InsElt0)
8961 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
8962 DAG.getIntPtrConstant(i));
8964 return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, NewV);
8967 // v32i8 shuffles - Translate to VPSHUFB if possible.
8969 SDValue LowerVECTOR_SHUFFLEv32i8(ShuffleVectorSDNode *SVOp,
8970 const X86Subtarget *Subtarget,
8971 SelectionDAG &DAG) {
8972 MVT VT = SVOp->getSimpleValueType(0);
8973 SDValue V1 = SVOp->getOperand(0);
8974 SDValue V2 = SVOp->getOperand(1);
8976 SmallVector<int, 32> MaskVals(SVOp->getMask().begin(), SVOp->getMask().end());
8978 bool V2IsUndef = V2.getOpcode() == ISD::UNDEF;
8979 bool V1IsAllZero = ISD::isBuildVectorAllZeros(V1.getNode());
8980 bool V2IsAllZero = ISD::isBuildVectorAllZeros(V2.getNode());
8982 // VPSHUFB may be generated if
8983 // (1) one of input vector is undefined or zeroinitializer.
8984 // The mask value 0x80 puts 0 in the corresponding slot of the vector.
8985 // And (2) the mask indexes don't cross the 128-bit lane.
8986 if (VT != MVT::v32i8 || !Subtarget->hasInt256() ||
8987 (!V2IsUndef && !V2IsAllZero && !V1IsAllZero))
8990 if (V1IsAllZero && !V2IsAllZero) {
8991 CommuteVectorShuffleMask(MaskVals, 32);
8994 return getPSHUFB(MaskVals, V1, dl, DAG);
8997 /// RewriteAsNarrowerShuffle - Try rewriting v8i16 and v16i8 shuffles as 4 wide
8998 /// ones, or rewriting v4i32 / v4f32 as 2 wide ones if possible. This can be
8999 /// done when every pair / quad of shuffle mask elements point to elements in
9000 /// the right sequence. e.g.
9001 /// vector_shuffle X, Y, <2, 3, | 10, 11, | 0, 1, | 14, 15>
9003 SDValue RewriteAsNarrowerShuffle(ShuffleVectorSDNode *SVOp,
9004 SelectionDAG &DAG) {
9005 MVT VT = SVOp->getSimpleValueType(0);
9007 unsigned NumElems = VT.getVectorNumElements();
9010 switch (VT.SimpleTy) {
9011 default: llvm_unreachable("Unexpected!");
9014 return SDValue(SVOp, 0);
9015 case MVT::v4f32: NewVT = MVT::v2f64; Scale = 2; break;
9016 case MVT::v4i32: NewVT = MVT::v2i64; Scale = 2; break;
9017 case MVT::v8i16: NewVT = MVT::v4i32; Scale = 2; break;
9018 case MVT::v16i8: NewVT = MVT::v4i32; Scale = 4; break;
9019 case MVT::v16i16: NewVT = MVT::v8i32; Scale = 2; break;
9020 case MVT::v32i8: NewVT = MVT::v8i32; Scale = 4; break;
9023 SmallVector<int, 8> MaskVec;
9024 for (unsigned i = 0; i != NumElems; i += Scale) {
9026 for (unsigned j = 0; j != Scale; ++j) {
9027 int EltIdx = SVOp->getMaskElt(i+j);
9031 StartIdx = (EltIdx / Scale);
9032 if (EltIdx != (int)(StartIdx*Scale + j))
9035 MaskVec.push_back(StartIdx);
9038 SDValue V1 = DAG.getNode(ISD::BITCAST, dl, NewVT, SVOp->getOperand(0));
9039 SDValue V2 = DAG.getNode(ISD::BITCAST, dl, NewVT, SVOp->getOperand(1));
9040 return DAG.getVectorShuffle(NewVT, dl, V1, V2, &MaskVec[0]);
9043 /// getVZextMovL - Return a zero-extending vector move low node.
9045 static SDValue getVZextMovL(MVT VT, MVT OpVT,
9046 SDValue SrcOp, SelectionDAG &DAG,
9047 const X86Subtarget *Subtarget, SDLoc dl) {
9048 if (VT == MVT::v2f64 || VT == MVT::v4f32) {
9049 LoadSDNode *LD = nullptr;
9050 if (!isScalarLoadToVector(SrcOp.getNode(), &LD))
9051 LD = dyn_cast<LoadSDNode>(SrcOp);
9053 // movssrr and movsdrr do not clear top bits. Try to use movd, movq
9055 MVT ExtVT = (OpVT == MVT::v2f64) ? MVT::i64 : MVT::i32;
9056 if ((ExtVT != MVT::i64 || Subtarget->is64Bit()) &&
9057 SrcOp.getOpcode() == ISD::SCALAR_TO_VECTOR &&
9058 SrcOp.getOperand(0).getOpcode() == ISD::BITCAST &&
9059 SrcOp.getOperand(0).getOperand(0).getValueType() == ExtVT) {
9061 OpVT = (OpVT == MVT::v2f64) ? MVT::v2i64 : MVT::v4i32;
9062 return DAG.getNode(ISD::BITCAST, dl, VT,
9063 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
9064 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
9072 return DAG.getNode(ISD::BITCAST, dl, VT,
9073 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
9074 DAG.getNode(ISD::BITCAST, dl,
9078 /// LowerVECTOR_SHUFFLE_256 - Handle all 256-bit wide vectors shuffles
9079 /// which could not be matched by any known target speficic shuffle
9081 LowerVECTOR_SHUFFLE_256(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
9083 SDValue NewOp = Compact8x32ShuffleNode(SVOp, DAG);
9084 if (NewOp.getNode())
9087 MVT VT = SVOp->getSimpleValueType(0);
9089 unsigned NumElems = VT.getVectorNumElements();
9090 unsigned NumLaneElems = NumElems / 2;
9093 MVT EltVT = VT.getVectorElementType();
9094 MVT NVT = MVT::getVectorVT(EltVT, NumLaneElems);
9097 SmallVector<int, 16> Mask;
9098 for (unsigned l = 0; l < 2; ++l) {
9099 // Build a shuffle mask for the output, discovering on the fly which
9100 // input vectors to use as shuffle operands (recorded in InputUsed).
9101 // If building a suitable shuffle vector proves too hard, then bail
9102 // out with UseBuildVector set.
9103 bool UseBuildVector = false;
9104 int InputUsed[2] = { -1, -1 }; // Not yet discovered.
9105 unsigned LaneStart = l * NumLaneElems;
9106 for (unsigned i = 0; i != NumLaneElems; ++i) {
9107 // The mask element. This indexes into the input.
9108 int Idx = SVOp->getMaskElt(i+LaneStart);
9110 // the mask element does not index into any input vector.
9115 // The input vector this mask element indexes into.
9116 int Input = Idx / NumLaneElems;
9118 // Turn the index into an offset from the start of the input vector.
9119 Idx -= Input * NumLaneElems;
9121 // Find or create a shuffle vector operand to hold this input.
9123 for (OpNo = 0; OpNo < array_lengthof(InputUsed); ++OpNo) {
9124 if (InputUsed[OpNo] == Input)
9125 // This input vector is already an operand.
9127 if (InputUsed[OpNo] < 0) {
9128 // Create a new operand for this input vector.
9129 InputUsed[OpNo] = Input;
9134 if (OpNo >= array_lengthof(InputUsed)) {
9135 // More than two input vectors used! Give up on trying to create a
9136 // shuffle vector. Insert all elements into a BUILD_VECTOR instead.
9137 UseBuildVector = true;
9141 // Add the mask index for the new shuffle vector.
9142 Mask.push_back(Idx + OpNo * NumLaneElems);
9145 if (UseBuildVector) {
9146 SmallVector<SDValue, 16> SVOps;
9147 for (unsigned i = 0; i != NumLaneElems; ++i) {
9148 // The mask element. This indexes into the input.
9149 int Idx = SVOp->getMaskElt(i+LaneStart);
9151 SVOps.push_back(DAG.getUNDEF(EltVT));
9155 // The input vector this mask element indexes into.
9156 int Input = Idx / NumElems;
9158 // Turn the index into an offset from the start of the input vector.
9159 Idx -= Input * NumElems;
9161 // Extract the vector element by hand.
9162 SVOps.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT,
9163 SVOp->getOperand(Input),
9164 DAG.getIntPtrConstant(Idx)));
9167 // Construct the output using a BUILD_VECTOR.
9168 Output[l] = DAG.getNode(ISD::BUILD_VECTOR, dl, NVT, SVOps);
9169 } else if (InputUsed[0] < 0) {
9170 // No input vectors were used! The result is undefined.
9171 Output[l] = DAG.getUNDEF(NVT);
9173 SDValue Op0 = Extract128BitVector(SVOp->getOperand(InputUsed[0] / 2),
9174 (InputUsed[0] % 2) * NumLaneElems,
9176 // If only one input was used, use an undefined vector for the other.
9177 SDValue Op1 = (InputUsed[1] < 0) ? DAG.getUNDEF(NVT) :
9178 Extract128BitVector(SVOp->getOperand(InputUsed[1] / 2),
9179 (InputUsed[1] % 2) * NumLaneElems, DAG, dl);
9180 // At least one input vector was used. Create a new shuffle vector.
9181 Output[l] = DAG.getVectorShuffle(NVT, dl, Op0, Op1, &Mask[0]);
9187 // Concatenate the result back
9188 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, Output[0], Output[1]);
9191 /// LowerVECTOR_SHUFFLE_128v4 - Handle all 128-bit wide vectors with
9192 /// 4 elements, and match them with several different shuffle types.
9194 LowerVECTOR_SHUFFLE_128v4(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
9195 SDValue V1 = SVOp->getOperand(0);
9196 SDValue V2 = SVOp->getOperand(1);
9198 MVT VT = SVOp->getSimpleValueType(0);
9200 assert(VT.is128BitVector() && "Unsupported vector size");
9202 std::pair<int, int> Locs[4];
9203 int Mask1[] = { -1, -1, -1, -1 };
9204 SmallVector<int, 8> PermMask(SVOp->getMask().begin(), SVOp->getMask().end());
9208 for (unsigned i = 0; i != 4; ++i) {
9209 int Idx = PermMask[i];
9211 Locs[i] = std::make_pair(-1, -1);
9213 assert(Idx < 8 && "Invalid VECTOR_SHUFFLE index!");
9215 Locs[i] = std::make_pair(0, NumLo);
9219 Locs[i] = std::make_pair(1, NumHi);
9221 Mask1[2+NumHi] = Idx;
9227 if (NumLo <= 2 && NumHi <= 2) {
9228 // If no more than two elements come from either vector. This can be
9229 // implemented with two shuffles. First shuffle gather the elements.
9230 // The second shuffle, which takes the first shuffle as both of its
9231 // vector operands, put the elements into the right order.
9232 V1 = DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
9234 int Mask2[] = { -1, -1, -1, -1 };
9236 for (unsigned i = 0; i != 4; ++i)
9237 if (Locs[i].first != -1) {
9238 unsigned Idx = (i < 2) ? 0 : 4;
9239 Idx += Locs[i].first * 2 + Locs[i].second;
9243 return DAG.getVectorShuffle(VT, dl, V1, V1, &Mask2[0]);
9246 if (NumLo == 3 || NumHi == 3) {
9247 // Otherwise, we must have three elements from one vector, call it X, and
9248 // one element from the other, call it Y. First, use a shufps to build an
9249 // intermediate vector with the one element from Y and the element from X
9250 // that will be in the same half in the final destination (the indexes don't
9251 // matter). Then, use a shufps to build the final vector, taking the half
9252 // containing the element from Y from the intermediate, and the other half
9255 // Normalize it so the 3 elements come from V1.
9256 CommuteVectorShuffleMask(PermMask, 4);
9260 // Find the element from V2.
9262 for (HiIndex = 0; HiIndex < 3; ++HiIndex) {
9263 int Val = PermMask[HiIndex];
9270 Mask1[0] = PermMask[HiIndex];
9272 Mask1[2] = PermMask[HiIndex^1];
9274 V2 = DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
9277 Mask1[0] = PermMask[0];
9278 Mask1[1] = PermMask[1];
9279 Mask1[2] = HiIndex & 1 ? 6 : 4;
9280 Mask1[3] = HiIndex & 1 ? 4 : 6;
9281 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
9284 Mask1[0] = HiIndex & 1 ? 2 : 0;
9285 Mask1[1] = HiIndex & 1 ? 0 : 2;
9286 Mask1[2] = PermMask[2];
9287 Mask1[3] = PermMask[3];
9292 return DAG.getVectorShuffle(VT, dl, V2, V1, &Mask1[0]);
9295 // Break it into (shuffle shuffle_hi, shuffle_lo).
9296 int LoMask[] = { -1, -1, -1, -1 };
9297 int HiMask[] = { -1, -1, -1, -1 };
9299 int *MaskPtr = LoMask;
9300 unsigned MaskIdx = 0;
9303 for (unsigned i = 0; i != 4; ++i) {
9310 int Idx = PermMask[i];
9312 Locs[i] = std::make_pair(-1, -1);
9313 } else if (Idx < 4) {
9314 Locs[i] = std::make_pair(MaskIdx, LoIdx);
9315 MaskPtr[LoIdx] = Idx;
9318 Locs[i] = std::make_pair(MaskIdx, HiIdx);
9319 MaskPtr[HiIdx] = Idx;
9324 SDValue LoShuffle = DAG.getVectorShuffle(VT, dl, V1, V2, &LoMask[0]);
9325 SDValue HiShuffle = DAG.getVectorShuffle(VT, dl, V1, V2, &HiMask[0]);
9326 int MaskOps[] = { -1, -1, -1, -1 };
9327 for (unsigned i = 0; i != 4; ++i)
9328 if (Locs[i].first != -1)
9329 MaskOps[i] = Locs[i].first * 4 + Locs[i].second;
9330 return DAG.getVectorShuffle(VT, dl, LoShuffle, HiShuffle, &MaskOps[0]);
9333 static bool MayFoldVectorLoad(SDValue V) {
9334 while (V.hasOneUse() && V.getOpcode() == ISD::BITCAST)
9335 V = V.getOperand(0);
9337 if (V.hasOneUse() && V.getOpcode() == ISD::SCALAR_TO_VECTOR)
9338 V = V.getOperand(0);
9339 if (V.hasOneUse() && V.getOpcode() == ISD::BUILD_VECTOR &&
9340 V.getNumOperands() == 2 && V.getOperand(1).getOpcode() == ISD::UNDEF)
9341 // BUILD_VECTOR (load), undef
9342 V = V.getOperand(0);
9344 return MayFoldLoad(V);
9348 SDValue getMOVDDup(SDValue &Op, SDLoc &dl, SDValue V1, SelectionDAG &DAG) {
9349 MVT VT = Op.getSimpleValueType();
9351 // Canonizalize to v2f64.
9352 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, V1);
9353 return DAG.getNode(ISD::BITCAST, dl, VT,
9354 getTargetShuffleNode(X86ISD::MOVDDUP, dl, MVT::v2f64,
9359 SDValue getMOVLowToHigh(SDValue &Op, SDLoc &dl, SelectionDAG &DAG,
9361 SDValue V1 = Op.getOperand(0);
9362 SDValue V2 = Op.getOperand(1);
9363 MVT VT = Op.getSimpleValueType();
9365 assert(VT != MVT::v2i64 && "unsupported shuffle type");
9367 if (HasSSE2 && VT == MVT::v2f64)
9368 return getTargetShuffleNode(X86ISD::MOVLHPD, dl, VT, V1, V2, DAG);
9370 // v4f32 or v4i32: canonizalized to v4f32 (which is legal for SSE1)
9371 return DAG.getNode(ISD::BITCAST, dl, VT,
9372 getTargetShuffleNode(X86ISD::MOVLHPS, dl, MVT::v4f32,
9373 DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, V1),
9374 DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, V2), DAG));
9378 SDValue getMOVHighToLow(SDValue &Op, SDLoc &dl, SelectionDAG &DAG) {
9379 SDValue V1 = Op.getOperand(0);
9380 SDValue V2 = Op.getOperand(1);
9381 MVT VT = Op.getSimpleValueType();
9383 assert((VT == MVT::v4i32 || VT == MVT::v4f32) &&
9384 "unsupported shuffle type");
9386 if (V2.getOpcode() == ISD::UNDEF)
9390 return getTargetShuffleNode(X86ISD::MOVHLPS, dl, VT, V1, V2, DAG);
9394 SDValue getMOVLP(SDValue &Op, SDLoc &dl, SelectionDAG &DAG, bool HasSSE2) {
9395 SDValue V1 = Op.getOperand(0);
9396 SDValue V2 = Op.getOperand(1);
9397 MVT VT = Op.getSimpleValueType();
9398 unsigned NumElems = VT.getVectorNumElements();
9400 // Use MOVLPS and MOVLPD in case V1 or V2 are loads. During isel, the second
9401 // operand of these instructions is only memory, so check if there's a
9402 // potencial load folding here, otherwise use SHUFPS or MOVSD to match the
9404 bool CanFoldLoad = false;
9406 // Trivial case, when V2 comes from a load.
9407 if (MayFoldVectorLoad(V2))
9410 // When V1 is a load, it can be folded later into a store in isel, example:
9411 // (store (v4f32 (X86Movlps (load addr:$src1), VR128:$src2)), addr:$src1)
9413 // (MOVLPSmr addr:$src1, VR128:$src2)
9414 // So, recognize this potential and also use MOVLPS or MOVLPD
9415 else if (MayFoldVectorLoad(V1) && MayFoldIntoStore(Op))
9418 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
9420 if (HasSSE2 && NumElems == 2)
9421 return getTargetShuffleNode(X86ISD::MOVLPD, dl, VT, V1, V2, DAG);
9424 // If we don't care about the second element, proceed to use movss.
9425 if (SVOp->getMaskElt(1) != -1)
9426 return getTargetShuffleNode(X86ISD::MOVLPS, dl, VT, V1, V2, DAG);
9429 // movl and movlp will both match v2i64, but v2i64 is never matched by
9430 // movl earlier because we make it strict to avoid messing with the movlp load
9431 // folding logic (see the code above getMOVLP call). Match it here then,
9432 // this is horrible, but will stay like this until we move all shuffle
9433 // matching to x86 specific nodes. Note that for the 1st condition all
9434 // types are matched with movsd.
9436 // FIXME: isMOVLMask should be checked and matched before getMOVLP,
9437 // as to remove this logic from here, as much as possible
9438 if (NumElems == 2 || !isMOVLMask(SVOp->getMask(), VT))
9439 return getTargetShuffleNode(X86ISD::MOVSD, dl, VT, V1, V2, DAG);
9440 return getTargetShuffleNode(X86ISD::MOVSS, dl, VT, V1, V2, DAG);
9443 assert(VT != MVT::v4i32 && "unsupported shuffle type");
9445 // Invert the operand order and use SHUFPS to match it.
9446 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V2, V1,
9447 getShuffleSHUFImmediate(SVOp), DAG);
9450 static SDValue NarrowVectorLoadToElement(LoadSDNode *Load, unsigned Index,
9451 SelectionDAG &DAG) {
9453 MVT VT = Load->getSimpleValueType(0);
9454 MVT EVT = VT.getVectorElementType();
9455 SDValue Addr = Load->getOperand(1);
9456 SDValue NewAddr = DAG.getNode(
9457 ISD::ADD, dl, Addr.getSimpleValueType(), Addr,
9458 DAG.getConstant(Index * EVT.getStoreSize(), Addr.getSimpleValueType()));
9461 DAG.getLoad(EVT, dl, Load->getChain(), NewAddr,
9462 DAG.getMachineFunction().getMachineMemOperand(
9463 Load->getMemOperand(), 0, EVT.getStoreSize()));
9467 // It is only safe to call this function if isINSERTPSMask is true for
9468 // this shufflevector mask.
9469 static SDValue getINSERTPS(ShuffleVectorSDNode *SVOp, SDLoc &dl,
9470 SelectionDAG &DAG) {
9471 // Generate an insertps instruction when inserting an f32 from memory onto a
9472 // v4f32 or when copying a member from one v4f32 to another.
9473 // We also use it for transferring i32 from one register to another,
9474 // since it simply copies the same bits.
9475 // If we're transferring an i32 from memory to a specific element in a
9476 // register, we output a generic DAG that will match the PINSRD
9478 MVT VT = SVOp->getSimpleValueType(0);
9479 MVT EVT = VT.getVectorElementType();
9480 SDValue V1 = SVOp->getOperand(0);
9481 SDValue V2 = SVOp->getOperand(1);
9482 auto Mask = SVOp->getMask();
9483 assert((VT == MVT::v4f32 || VT == MVT::v4i32) &&
9484 "unsupported vector type for insertps/pinsrd");
9486 auto FromV1Predicate = [](const int &i) { return i < 4 && i > -1; };
9487 auto FromV2Predicate = [](const int &i) { return i >= 4; };
9488 int FromV1 = std::count_if(Mask.begin(), Mask.end(), FromV1Predicate);
9496 DestIndex = std::find_if(Mask.begin(), Mask.end(), FromV1Predicate) -
9499 // If we have 1 element from each vector, we have to check if we're
9500 // changing V1's element's place. If so, we're done. Otherwise, we
9501 // should assume we're changing V2's element's place and behave
9503 int FromV2 = std::count_if(Mask.begin(), Mask.end(), FromV2Predicate);
9504 assert(DestIndex <= INT32_MAX && "truncated destination index");
9505 if (FromV1 == FromV2 &&
9506 static_cast<int>(DestIndex) == Mask[DestIndex] % 4) {
9510 std::find_if(Mask.begin(), Mask.end(), FromV2Predicate) - Mask.begin();
9513 assert(std::count_if(Mask.begin(), Mask.end(), FromV2Predicate) == 1 &&
9514 "More than one element from V1 and from V2, or no elements from one "
9515 "of the vectors. This case should not have returned true from "
9520 std::find_if(Mask.begin(), Mask.end(), FromV2Predicate) - Mask.begin();
9523 // Get an index into the source vector in the range [0,4) (the mask is
9524 // in the range [0,8) because it can address V1 and V2)
9525 unsigned SrcIndex = Mask[DestIndex] % 4;
9526 if (MayFoldLoad(From)) {
9527 // Trivial case, when From comes from a load and is only used by the
9528 // shuffle. Make it use insertps from the vector that we need from that
9531 NarrowVectorLoadToElement(cast<LoadSDNode>(From), SrcIndex, DAG);
9532 if (!NewLoad.getNode())
9535 if (EVT == MVT::f32) {
9536 // Create this as a scalar to vector to match the instruction pattern.
9537 SDValue LoadScalarToVector =
9538 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, NewLoad);
9539 SDValue InsertpsMask = DAG.getIntPtrConstant(DestIndex << 4);
9540 return DAG.getNode(X86ISD::INSERTPS, dl, VT, To, LoadScalarToVector,
9542 } else { // EVT == MVT::i32
9543 // If we're getting an i32 from memory, use an INSERT_VECTOR_ELT
9544 // instruction, to match the PINSRD instruction, which loads an i32 to a
9545 // certain vector element.
9546 return DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, To, NewLoad,
9547 DAG.getConstant(DestIndex, MVT::i32));
9551 // Vector-element-to-vector
9552 SDValue InsertpsMask = DAG.getIntPtrConstant(DestIndex << 4 | SrcIndex << 6);
9553 return DAG.getNode(X86ISD::INSERTPS, dl, VT, To, From, InsertpsMask);
9556 // Reduce a vector shuffle to zext.
9557 static SDValue LowerVectorIntExtend(SDValue Op, const X86Subtarget *Subtarget,
9558 SelectionDAG &DAG) {
9559 // PMOVZX is only available from SSE41.
9560 if (!Subtarget->hasSSE41())
9563 MVT VT = Op.getSimpleValueType();
9565 // Only AVX2 support 256-bit vector integer extending.
9566 if (!Subtarget->hasInt256() && VT.is256BitVector())
9569 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
9571 SDValue V1 = Op.getOperand(0);
9572 SDValue V2 = Op.getOperand(1);
9573 unsigned NumElems = VT.getVectorNumElements();
9575 // Extending is an unary operation and the element type of the source vector
9576 // won't be equal to or larger than i64.
9577 if (V2.getOpcode() != ISD::UNDEF || !VT.isInteger() ||
9578 VT.getVectorElementType() == MVT::i64)
9581 // Find the expansion ratio, e.g. expanding from i8 to i32 has a ratio of 4.
9582 unsigned Shift = 1; // Start from 2, i.e. 1 << 1.
9583 while ((1U << Shift) < NumElems) {
9584 if (SVOp->getMaskElt(1U << Shift) == 1)
9587 // The maximal ratio is 8, i.e. from i8 to i64.
9592 // Check the shuffle mask.
9593 unsigned Mask = (1U << Shift) - 1;
9594 for (unsigned i = 0; i != NumElems; ++i) {
9595 int EltIdx = SVOp->getMaskElt(i);
9596 if ((i & Mask) != 0 && EltIdx != -1)
9598 if ((i & Mask) == 0 && (unsigned)EltIdx != (i >> Shift))
9602 unsigned NBits = VT.getVectorElementType().getSizeInBits() << Shift;
9603 MVT NeVT = MVT::getIntegerVT(NBits);
9604 MVT NVT = MVT::getVectorVT(NeVT, NumElems >> Shift);
9606 if (!DAG.getTargetLoweringInfo().isTypeLegal(NVT))
9609 // Simplify the operand as it's prepared to be fed into shuffle.
9610 unsigned SignificantBits = NVT.getSizeInBits() >> Shift;
9611 if (V1.getOpcode() == ISD::BITCAST &&
9612 V1.getOperand(0).getOpcode() == ISD::SCALAR_TO_VECTOR &&
9613 V1.getOperand(0).getOperand(0).getOpcode() == ISD::EXTRACT_VECTOR_ELT &&
9614 V1.getOperand(0).getOperand(0)
9615 .getSimpleValueType().getSizeInBits() == SignificantBits) {
9616 // (bitcast (sclr2vec (ext_vec_elt x))) -> (bitcast x)
9617 SDValue V = V1.getOperand(0).getOperand(0).getOperand(0);
9618 ConstantSDNode *CIdx =
9619 dyn_cast<ConstantSDNode>(V1.getOperand(0).getOperand(0).getOperand(1));
9620 // If it's foldable, i.e. normal load with single use, we will let code
9621 // selection to fold it. Otherwise, we will short the conversion sequence.
9622 if (CIdx && CIdx->getZExtValue() == 0 &&
9623 (!ISD::isNormalLoad(V.getNode()) || !V.hasOneUse())) {
9624 MVT FullVT = V.getSimpleValueType();
9625 MVT V1VT = V1.getSimpleValueType();
9626 if (FullVT.getSizeInBits() > V1VT.getSizeInBits()) {
9627 // The "ext_vec_elt" node is wider than the result node.
9628 // In this case we should extract subvector from V.
9629 // (bitcast (sclr2vec (ext_vec_elt x))) -> (bitcast (extract_subvector x)).
9630 unsigned Ratio = FullVT.getSizeInBits() / V1VT.getSizeInBits();
9631 MVT SubVecVT = MVT::getVectorVT(FullVT.getVectorElementType(),
9632 FullVT.getVectorNumElements()/Ratio);
9633 V = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, SubVecVT, V,
9634 DAG.getIntPtrConstant(0));
9636 V1 = DAG.getNode(ISD::BITCAST, DL, V1VT, V);
9640 return DAG.getNode(ISD::BITCAST, DL, VT,
9641 DAG.getNode(X86ISD::VZEXT, DL, NVT, V1));
9644 static SDValue NormalizeVectorShuffle(SDValue Op, const X86Subtarget *Subtarget,
9645 SelectionDAG &DAG) {
9646 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
9647 MVT VT = Op.getSimpleValueType();
9649 SDValue V1 = Op.getOperand(0);
9650 SDValue V2 = Op.getOperand(1);
9652 if (isZeroShuffle(SVOp))
9653 return getZeroVector(VT, Subtarget, DAG, dl);
9655 // Handle splat operations
9656 if (SVOp->isSplat()) {
9657 // Use vbroadcast whenever the splat comes from a foldable load
9658 SDValue Broadcast = LowerVectorBroadcast(Op, Subtarget, DAG);
9659 if (Broadcast.getNode())
9663 // Check integer expanding shuffles.
9664 SDValue NewOp = LowerVectorIntExtend(Op, Subtarget, DAG);
9665 if (NewOp.getNode())
9668 // If the shuffle can be profitably rewritten as a narrower shuffle, then
9670 if (VT == MVT::v8i16 || VT == MVT::v16i8 || VT == MVT::v16i16 ||
9672 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG);
9673 if (NewOp.getNode())
9674 return DAG.getNode(ISD::BITCAST, dl, VT, NewOp);
9675 } else if (VT.is128BitVector() && Subtarget->hasSSE2()) {
9676 // FIXME: Figure out a cleaner way to do this.
9677 if (ISD::isBuildVectorAllZeros(V2.getNode())) {
9678 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG);
9679 if (NewOp.getNode()) {
9680 MVT NewVT = NewOp.getSimpleValueType();
9681 if (isCommutedMOVLMask(cast<ShuffleVectorSDNode>(NewOp)->getMask(),
9682 NewVT, true, false))
9683 return getVZextMovL(VT, NewVT, NewOp.getOperand(0), DAG, Subtarget,
9686 } else if (ISD::isBuildVectorAllZeros(V1.getNode())) {
9687 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG);
9688 if (NewOp.getNode()) {
9689 MVT NewVT = NewOp.getSimpleValueType();
9690 if (isMOVLMask(cast<ShuffleVectorSDNode>(NewOp)->getMask(), NewVT))
9691 return getVZextMovL(VT, NewVT, NewOp.getOperand(1), DAG, Subtarget,
9700 X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const {
9701 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
9702 SDValue V1 = Op.getOperand(0);
9703 SDValue V2 = Op.getOperand(1);
9704 MVT VT = Op.getSimpleValueType();
9706 unsigned NumElems = VT.getVectorNumElements();
9707 bool V1IsUndef = V1.getOpcode() == ISD::UNDEF;
9708 bool V2IsUndef = V2.getOpcode() == ISD::UNDEF;
9709 bool V1IsSplat = false;
9710 bool V2IsSplat = false;
9711 bool HasSSE2 = Subtarget->hasSSE2();
9712 bool HasFp256 = Subtarget->hasFp256();
9713 bool HasInt256 = Subtarget->hasInt256();
9714 MachineFunction &MF = DAG.getMachineFunction();
9715 bool OptForSize = MF.getFunction()->getAttributes().
9716 hasAttribute(AttributeSet::FunctionIndex, Attribute::OptimizeForSize);
9718 // Check if we should use the experimental vector shuffle lowering. If so,
9719 // delegate completely to that code path.
9720 if (ExperimentalVectorShuffleLowering)
9721 return lowerVectorShuffle(Op, Subtarget, DAG);
9723 assert(VT.getSizeInBits() != 64 && "Can't lower MMX shuffles");
9725 if (V1IsUndef && V2IsUndef)
9726 return DAG.getUNDEF(VT);
9728 // When we create a shuffle node we put the UNDEF node to second operand,
9729 // but in some cases the first operand may be transformed to UNDEF.
9730 // In this case we should just commute the node.
9732 return DAG.getCommutedVectorShuffle(*SVOp);
9734 // Vector shuffle lowering takes 3 steps:
9736 // 1) Normalize the input vectors. Here splats, zeroed vectors, profitable
9737 // narrowing and commutation of operands should be handled.
9738 // 2) Matching of shuffles with known shuffle masks to x86 target specific
9740 // 3) Rewriting of unmatched masks into new generic shuffle operations,
9741 // so the shuffle can be broken into other shuffles and the legalizer can
9742 // try the lowering again.
9744 // The general idea is that no vector_shuffle operation should be left to
9745 // be matched during isel, all of them must be converted to a target specific
9748 // Normalize the input vectors. Here splats, zeroed vectors, profitable
9749 // narrowing and commutation of operands should be handled. The actual code
9750 // doesn't include all of those, work in progress...
9751 SDValue NewOp = NormalizeVectorShuffle(Op, Subtarget, DAG);
9752 if (NewOp.getNode())
9755 SmallVector<int, 8> M(SVOp->getMask().begin(), SVOp->getMask().end());
9757 // NOTE: isPSHUFDMask can also match both masks below (unpckl_undef and
9758 // unpckh_undef). Only use pshufd if speed is more important than size.
9759 if (OptForSize && isUNPCKL_v_undef_Mask(M, VT, HasInt256))
9760 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V1, DAG);
9761 if (OptForSize && isUNPCKH_v_undef_Mask(M, VT, HasInt256))
9762 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V1, DAG);
9764 if (isMOVDDUPMask(M, VT) && Subtarget->hasSSE3() &&
9765 V2IsUndef && MayFoldVectorLoad(V1))
9766 return getMOVDDup(Op, dl, V1, DAG);
9768 if (isMOVHLPS_v_undef_Mask(M, VT))
9769 return getMOVHighToLow(Op, dl, DAG);
9771 // Use to match splats
9772 if (HasSSE2 && isUNPCKHMask(M, VT, HasInt256) && V2IsUndef &&
9773 (VT == MVT::v2f64 || VT == MVT::v2i64))
9774 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V1, DAG);
9776 if (isPSHUFDMask(M, VT)) {
9777 // The actual implementation will match the mask in the if above and then
9778 // during isel it can match several different instructions, not only pshufd
9779 // as its name says, sad but true, emulate the behavior for now...
9780 if (isMOVDDUPMask(M, VT) && ((VT == MVT::v4f32 || VT == MVT::v2i64)))
9781 return getTargetShuffleNode(X86ISD::MOVLHPS, dl, VT, V1, V1, DAG);
9783 unsigned TargetMask = getShuffleSHUFImmediate(SVOp);
9785 if (HasSSE2 && (VT == MVT::v4f32 || VT == MVT::v4i32))
9786 return getTargetShuffleNode(X86ISD::PSHUFD, dl, VT, V1, TargetMask, DAG);
9788 if (HasFp256 && (VT == MVT::v4f32 || VT == MVT::v2f64))
9789 return getTargetShuffleNode(X86ISD::VPERMILP, dl, VT, V1, TargetMask,
9792 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V1, V1,
9796 if (isPALIGNRMask(M, VT, Subtarget))
9797 return getTargetShuffleNode(X86ISD::PALIGNR, dl, VT, V1, V2,
9798 getShufflePALIGNRImmediate(SVOp),
9801 if (isVALIGNMask(M, VT, Subtarget))
9802 return getTargetShuffleNode(X86ISD::VALIGN, dl, VT, V1, V2,
9803 getShuffleVALIGNImmediate(SVOp),
9806 // Check if this can be converted into a logical shift.
9807 bool isLeft = false;
9810 bool isShift = HasSSE2 && isVectorShift(SVOp, DAG, isLeft, ShVal, ShAmt);
9811 if (isShift && ShVal.hasOneUse()) {
9812 // If the shifted value has multiple uses, it may be cheaper to use
9813 // v_set0 + movlhps or movhlps, etc.
9814 MVT EltVT = VT.getVectorElementType();
9815 ShAmt *= EltVT.getSizeInBits();
9816 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
9819 if (isMOVLMask(M, VT)) {
9820 if (ISD::isBuildVectorAllZeros(V1.getNode()))
9821 return getVZextMovL(VT, VT, V2, DAG, Subtarget, dl);
9822 if (!isMOVLPMask(M, VT)) {
9823 if (HasSSE2 && (VT == MVT::v2i64 || VT == MVT::v2f64))
9824 return getTargetShuffleNode(X86ISD::MOVSD, dl, VT, V1, V2, DAG);
9826 if (VT == MVT::v4i32 || VT == MVT::v4f32)
9827 return getTargetShuffleNode(X86ISD::MOVSS, dl, VT, V1, V2, DAG);
9831 // FIXME: fold these into legal mask.
9832 if (isMOVLHPSMask(M, VT) && !isUNPCKLMask(M, VT, HasInt256))
9833 return getMOVLowToHigh(Op, dl, DAG, HasSSE2);
9835 if (isMOVHLPSMask(M, VT))
9836 return getMOVHighToLow(Op, dl, DAG);
9838 if (V2IsUndef && isMOVSHDUPMask(M, VT, Subtarget))
9839 return getTargetShuffleNode(X86ISD::MOVSHDUP, dl, VT, V1, DAG);
9841 if (V2IsUndef && isMOVSLDUPMask(M, VT, Subtarget))
9842 return getTargetShuffleNode(X86ISD::MOVSLDUP, dl, VT, V1, DAG);
9844 if (isMOVLPMask(M, VT))
9845 return getMOVLP(Op, dl, DAG, HasSSE2);
9847 if (ShouldXformToMOVHLPS(M, VT) ||
9848 ShouldXformToMOVLP(V1.getNode(), V2.getNode(), M, VT))
9849 return DAG.getCommutedVectorShuffle(*SVOp);
9852 // No better options. Use a vshldq / vsrldq.
9853 MVT EltVT = VT.getVectorElementType();
9854 ShAmt *= EltVT.getSizeInBits();
9855 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
9858 bool Commuted = false;
9859 // FIXME: This should also accept a bitcast of a splat? Be careful, not
9860 // 1,1,1,1 -> v8i16 though.
9861 BitVector UndefElements;
9862 if (auto *BVOp = dyn_cast<BuildVectorSDNode>(V1.getNode()))
9863 if (BVOp->getConstantSplatNode(&UndefElements) && UndefElements.none())
9865 if (auto *BVOp = dyn_cast<BuildVectorSDNode>(V2.getNode()))
9866 if (BVOp->getConstantSplatNode(&UndefElements) && UndefElements.none())
9869 // Canonicalize the splat or undef, if present, to be on the RHS.
9870 if (!V2IsUndef && V1IsSplat && !V2IsSplat) {
9871 CommuteVectorShuffleMask(M, NumElems);
9873 std::swap(V1IsSplat, V2IsSplat);
9877 if (isCommutedMOVLMask(M, VT, V2IsSplat, V2IsUndef)) {
9878 // Shuffling low element of v1 into undef, just return v1.
9881 // If V2 is a splat, the mask may be malformed such as <4,3,3,3>, which
9882 // the instruction selector will not match, so get a canonical MOVL with
9883 // swapped operands to undo the commute.
9884 return getMOVL(DAG, dl, VT, V2, V1);
9887 if (isUNPCKLMask(M, VT, HasInt256))
9888 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V2, DAG);
9890 if (isUNPCKHMask(M, VT, HasInt256))
9891 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V2, DAG);
9894 // Normalize mask so all entries that point to V2 points to its first
9895 // element then try to match unpck{h|l} again. If match, return a
9896 // new vector_shuffle with the corrected mask.p
9897 SmallVector<int, 8> NewMask(M.begin(), M.end());
9898 NormalizeMask(NewMask, NumElems);
9899 if (isUNPCKLMask(NewMask, VT, HasInt256, true))
9900 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V2, DAG);
9901 if (isUNPCKHMask(NewMask, VT, HasInt256, true))
9902 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V2, DAG);
9906 // Commute is back and try unpck* again.
9907 // FIXME: this seems wrong.
9908 CommuteVectorShuffleMask(M, NumElems);
9910 std::swap(V1IsSplat, V2IsSplat);
9912 if (isUNPCKLMask(M, VT, HasInt256))
9913 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V2, DAG);
9915 if (isUNPCKHMask(M, VT, HasInt256))
9916 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V2, DAG);
9919 // Normalize the node to match x86 shuffle ops if needed
9920 if (!V2IsUndef && (isSHUFPMask(M, VT, /* Commuted */ true)))
9921 return DAG.getCommutedVectorShuffle(*SVOp);
9923 // The checks below are all present in isShuffleMaskLegal, but they are
9924 // inlined here right now to enable us to directly emit target specific
9925 // nodes, and remove one by one until they don't return Op anymore.
9927 if (ShuffleVectorSDNode::isSplatMask(&M[0], VT) &&
9928 SVOp->getSplatIndex() == 0 && V2IsUndef) {
9929 if (VT == MVT::v2f64 || VT == MVT::v2i64)
9930 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V1, DAG);
9933 if (isPSHUFHWMask(M, VT, HasInt256))
9934 return getTargetShuffleNode(X86ISD::PSHUFHW, dl, VT, V1,
9935 getShufflePSHUFHWImmediate(SVOp),
9938 if (isPSHUFLWMask(M, VT, HasInt256))
9939 return getTargetShuffleNode(X86ISD::PSHUFLW, dl, VT, V1,
9940 getShufflePSHUFLWImmediate(SVOp),
9944 if (isBlendMask(M, VT, Subtarget->hasSSE41(), Subtarget->hasInt256(),
9946 return LowerVECTOR_SHUFFLEtoBlend(SVOp, MaskValue, Subtarget, DAG);
9948 if (isSHUFPMask(M, VT))
9949 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V1, V2,
9950 getShuffleSHUFImmediate(SVOp), DAG);
9952 if (isUNPCKL_v_undef_Mask(M, VT, HasInt256))
9953 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V1, DAG);
9954 if (isUNPCKH_v_undef_Mask(M, VT, HasInt256))
9955 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V1, DAG);
9957 //===--------------------------------------------------------------------===//
9958 // Generate target specific nodes for 128 or 256-bit shuffles only
9959 // supported in the AVX instruction set.
9962 // Handle VMOVDDUPY permutations
9963 if (V2IsUndef && isMOVDDUPYMask(M, VT, HasFp256))
9964 return getTargetShuffleNode(X86ISD::MOVDDUP, dl, VT, V1, DAG);
9966 // Handle VPERMILPS/D* permutations
9967 if (isVPERMILPMask(M, VT)) {
9968 if ((HasInt256 && VT == MVT::v8i32) || VT == MVT::v16i32)
9969 return getTargetShuffleNode(X86ISD::PSHUFD, dl, VT, V1,
9970 getShuffleSHUFImmediate(SVOp), DAG);
9971 return getTargetShuffleNode(X86ISD::VPERMILP, dl, VT, V1,
9972 getShuffleSHUFImmediate(SVOp), DAG);
9976 if (VT.is512BitVector() && isINSERT64x4Mask(M, VT, &Idx))
9977 return Insert256BitVector(V1, Extract256BitVector(V2, 0, DAG, dl),
9978 Idx*(NumElems/2), DAG, dl);
9980 // Handle VPERM2F128/VPERM2I128 permutations
9981 if (isVPERM2X128Mask(M, VT, HasFp256))
9982 return getTargetShuffleNode(X86ISD::VPERM2X128, dl, VT, V1,
9983 V2, getShuffleVPERM2X128Immediate(SVOp), DAG);
9985 if (Subtarget->hasSSE41() && isINSERTPSMask(M, VT))
9986 return getINSERTPS(SVOp, dl, DAG);
9989 if (V2IsUndef && HasInt256 && isPermImmMask(M, VT, Imm8))
9990 return getTargetShuffleNode(X86ISD::VPERMI, dl, VT, V1, Imm8, DAG);
9992 if ((V2IsUndef && HasInt256 && VT.is256BitVector() && NumElems == 8) ||
9993 VT.is512BitVector()) {
9994 MVT MaskEltVT = MVT::getIntegerVT(VT.getVectorElementType().getSizeInBits());
9995 MVT MaskVectorVT = MVT::getVectorVT(MaskEltVT, NumElems);
9996 SmallVector<SDValue, 16> permclMask;
9997 for (unsigned i = 0; i != NumElems; ++i) {
9998 permclMask.push_back(DAG.getConstant((M[i]>=0) ? M[i] : 0, MaskEltVT));
10001 SDValue Mask = DAG.getNode(ISD::BUILD_VECTOR, dl, MaskVectorVT, permclMask);
10003 // Bitcast is for VPERMPS since mask is v8i32 but node takes v8f32
10004 return DAG.getNode(X86ISD::VPERMV, dl, VT,
10005 DAG.getNode(ISD::BITCAST, dl, VT, Mask), V1);
10006 return DAG.getNode(X86ISD::VPERMV3, dl, VT, V1,
10007 DAG.getNode(ISD::BITCAST, dl, VT, Mask), V2);
10010 //===--------------------------------------------------------------------===//
10011 // Since no target specific shuffle was selected for this generic one,
10012 // lower it into other known shuffles. FIXME: this isn't true yet, but
10013 // this is the plan.
10016 // Handle v8i16 specifically since SSE can do byte extraction and insertion.
10017 if (VT == MVT::v8i16) {
10018 SDValue NewOp = LowerVECTOR_SHUFFLEv8i16(Op, Subtarget, DAG);
10019 if (NewOp.getNode())
10023 if (VT == MVT::v16i16 && Subtarget->hasInt256()) {
10024 SDValue NewOp = LowerVECTOR_SHUFFLEv16i16(Op, DAG);
10025 if (NewOp.getNode())
10029 if (VT == MVT::v16i8) {
10030 SDValue NewOp = LowerVECTOR_SHUFFLEv16i8(SVOp, Subtarget, DAG);
10031 if (NewOp.getNode())
10035 if (VT == MVT::v32i8) {
10036 SDValue NewOp = LowerVECTOR_SHUFFLEv32i8(SVOp, Subtarget, DAG);
10037 if (NewOp.getNode())
10041 // Handle all 128-bit wide vectors with 4 elements, and match them with
10042 // several different shuffle types.
10043 if (NumElems == 4 && VT.is128BitVector())
10044 return LowerVECTOR_SHUFFLE_128v4(SVOp, DAG);
10046 // Handle general 256-bit shuffles
10047 if (VT.is256BitVector())
10048 return LowerVECTOR_SHUFFLE_256(SVOp, DAG);
10053 // This function assumes its argument is a BUILD_VECTOR of constants or
10054 // undef SDNodes. i.e: ISD::isBuildVectorOfConstantSDNodes(BuildVector) is
10056 static bool BUILD_VECTORtoBlendMask(BuildVectorSDNode *BuildVector,
10057 unsigned &MaskValue) {
10059 unsigned NumElems = BuildVector->getNumOperands();
10060 // There are 2 lanes if (NumElems > 8), and 1 lane otherwise.
10061 unsigned NumLanes = (NumElems - 1) / 8 + 1;
10062 unsigned NumElemsInLane = NumElems / NumLanes;
10064 // Blend for v16i16 should be symetric for the both lanes.
10065 for (unsigned i = 0; i < NumElemsInLane; ++i) {
10066 SDValue EltCond = BuildVector->getOperand(i);
10067 SDValue SndLaneEltCond =
10068 (NumLanes == 2) ? BuildVector->getOperand(i + NumElemsInLane) : EltCond;
10070 int Lane1Cond = -1, Lane2Cond = -1;
10071 if (isa<ConstantSDNode>(EltCond))
10072 Lane1Cond = !isZero(EltCond);
10073 if (isa<ConstantSDNode>(SndLaneEltCond))
10074 Lane2Cond = !isZero(SndLaneEltCond);
10076 if (Lane1Cond == Lane2Cond || Lane2Cond < 0)
10077 // Lane1Cond != 0, means we want the first argument.
10078 // Lane1Cond == 0, means we want the second argument.
10079 // The encoding of this argument is 0 for the first argument, 1
10080 // for the second. Therefore, invert the condition.
10081 MaskValue |= !Lane1Cond << i;
10082 else if (Lane1Cond < 0)
10083 MaskValue |= !Lane2Cond << i;
10090 // Try to lower a vselect node into a simple blend instruction.
10091 static SDValue LowerVSELECTtoBlend(SDValue Op, const X86Subtarget *Subtarget,
10092 SelectionDAG &DAG) {
10093 SDValue Cond = Op.getOperand(0);
10094 SDValue LHS = Op.getOperand(1);
10095 SDValue RHS = Op.getOperand(2);
10097 MVT VT = Op.getSimpleValueType();
10098 MVT EltVT = VT.getVectorElementType();
10099 unsigned NumElems = VT.getVectorNumElements();
10101 // There is no blend with immediate in AVX-512.
10102 if (VT.is512BitVector())
10105 if (!Subtarget->hasSSE41() || EltVT == MVT::i8)
10107 if (!Subtarget->hasInt256() && VT == MVT::v16i16)
10110 if (!ISD::isBuildVectorOfConstantSDNodes(Cond.getNode()))
10113 // Check the mask for BLEND and build the value.
10114 unsigned MaskValue = 0;
10115 if (!BUILD_VECTORtoBlendMask(cast<BuildVectorSDNode>(Cond), MaskValue))
10118 // Convert i32 vectors to floating point if it is not AVX2.
10119 // AVX2 introduced VPBLENDD instruction for 128 and 256-bit vectors.
10121 if (EltVT == MVT::i64 || (EltVT == MVT::i32 && !Subtarget->hasInt256())) {
10122 BlendVT = MVT::getVectorVT(MVT::getFloatingPointVT(EltVT.getSizeInBits()),
10124 LHS = DAG.getNode(ISD::BITCAST, dl, VT, LHS);
10125 RHS = DAG.getNode(ISD::BITCAST, dl, VT, RHS);
10128 SDValue Ret = DAG.getNode(X86ISD::BLENDI, dl, BlendVT, LHS, RHS,
10129 DAG.getConstant(MaskValue, MVT::i32));
10130 return DAG.getNode(ISD::BITCAST, dl, VT, Ret);
10133 SDValue X86TargetLowering::LowerVSELECT(SDValue Op, SelectionDAG &DAG) const {
10134 SDValue BlendOp = LowerVSELECTtoBlend(Op, Subtarget, DAG);
10135 if (BlendOp.getNode())
10138 // Some types for vselect were previously set to Expand, not Legal or
10139 // Custom. Return an empty SDValue so we fall-through to Expand, after
10140 // the Custom lowering phase.
10141 MVT VT = Op.getSimpleValueType();
10142 switch (VT.SimpleTy) {
10150 // We couldn't create a "Blend with immediate" node.
10151 // This node should still be legal, but we'll have to emit a blendv*
10156 static SDValue LowerEXTRACT_VECTOR_ELT_SSE4(SDValue Op, SelectionDAG &DAG) {
10157 MVT VT = Op.getSimpleValueType();
10160 if (!Op.getOperand(0).getSimpleValueType().is128BitVector())
10163 if (VT.getSizeInBits() == 8) {
10164 SDValue Extract = DAG.getNode(X86ISD::PEXTRB, dl, MVT::i32,
10165 Op.getOperand(0), Op.getOperand(1));
10166 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
10167 DAG.getValueType(VT));
10168 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
10171 if (VT.getSizeInBits() == 16) {
10172 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
10173 // If Idx is 0, it's cheaper to do a move instead of a pextrw.
10175 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
10176 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
10177 DAG.getNode(ISD::BITCAST, dl,
10180 Op.getOperand(1)));
10181 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, MVT::i32,
10182 Op.getOperand(0), Op.getOperand(1));
10183 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
10184 DAG.getValueType(VT));
10185 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
10188 if (VT == MVT::f32) {
10189 // EXTRACTPS outputs to a GPR32 register which will require a movd to copy
10190 // the result back to FR32 register. It's only worth matching if the
10191 // result has a single use which is a store or a bitcast to i32. And in
10192 // the case of a store, it's not worth it if the index is a constant 0,
10193 // because a MOVSSmr can be used instead, which is smaller and faster.
10194 if (!Op.hasOneUse())
10196 SDNode *User = *Op.getNode()->use_begin();
10197 if ((User->getOpcode() != ISD::STORE ||
10198 (isa<ConstantSDNode>(Op.getOperand(1)) &&
10199 cast<ConstantSDNode>(Op.getOperand(1))->isNullValue())) &&
10200 (User->getOpcode() != ISD::BITCAST ||
10201 User->getValueType(0) != MVT::i32))
10203 SDValue Extract = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
10204 DAG.getNode(ISD::BITCAST, dl, MVT::v4i32,
10207 return DAG.getNode(ISD::BITCAST, dl, MVT::f32, Extract);
10210 if (VT == MVT::i32 || VT == MVT::i64) {
10211 // ExtractPS/pextrq works with constant index.
10212 if (isa<ConstantSDNode>(Op.getOperand(1)))
10218 /// Extract one bit from mask vector, like v16i1 or v8i1.
10219 /// AVX-512 feature.
10221 X86TargetLowering::ExtractBitFromMaskVector(SDValue Op, SelectionDAG &DAG) const {
10222 SDValue Vec = Op.getOperand(0);
10224 MVT VecVT = Vec.getSimpleValueType();
10225 SDValue Idx = Op.getOperand(1);
10226 MVT EltVT = Op.getSimpleValueType();
10228 assert((EltVT == MVT::i1) && "Unexpected operands in ExtractBitFromMaskVector");
10230 // variable index can't be handled in mask registers,
10231 // extend vector to VR512
10232 if (!isa<ConstantSDNode>(Idx)) {
10233 MVT ExtVT = (VecVT == MVT::v8i1 ? MVT::v8i64 : MVT::v16i32);
10234 SDValue Ext = DAG.getNode(ISD::ZERO_EXTEND, dl, ExtVT, Vec);
10235 SDValue Elt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl,
10236 ExtVT.getVectorElementType(), Ext, Idx);
10237 return DAG.getNode(ISD::TRUNCATE, dl, EltVT, Elt);
10240 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
10241 const TargetRegisterClass* rc = getRegClassFor(VecVT);
10242 unsigned MaxSift = rc->getSize()*8 - 1;
10243 Vec = DAG.getNode(X86ISD::VSHLI, dl, VecVT, Vec,
10244 DAG.getConstant(MaxSift - IdxVal, MVT::i8));
10245 Vec = DAG.getNode(X86ISD::VSRLI, dl, VecVT, Vec,
10246 DAG.getConstant(MaxSift, MVT::i8));
10247 return DAG.getNode(X86ISD::VEXTRACT, dl, MVT::i1, Vec,
10248 DAG.getIntPtrConstant(0));
10252 X86TargetLowering::LowerEXTRACT_VECTOR_ELT(SDValue Op,
10253 SelectionDAG &DAG) const {
10255 SDValue Vec = Op.getOperand(0);
10256 MVT VecVT = Vec.getSimpleValueType();
10257 SDValue Idx = Op.getOperand(1);
10259 if (Op.getSimpleValueType() == MVT::i1)
10260 return ExtractBitFromMaskVector(Op, DAG);
10262 if (!isa<ConstantSDNode>(Idx)) {
10263 if (VecVT.is512BitVector() ||
10264 (VecVT.is256BitVector() && Subtarget->hasInt256() &&
10265 VecVT.getVectorElementType().getSizeInBits() == 32)) {
10268 MVT::getIntegerVT(VecVT.getVectorElementType().getSizeInBits());
10269 MVT MaskVT = MVT::getVectorVT(MaskEltVT, VecVT.getSizeInBits() /
10270 MaskEltVT.getSizeInBits());
10272 Idx = DAG.getZExtOrTrunc(Idx, dl, MaskEltVT);
10273 SDValue Mask = DAG.getNode(X86ISD::VINSERT, dl, MaskVT,
10274 getZeroVector(MaskVT, Subtarget, DAG, dl),
10275 Idx, DAG.getConstant(0, getPointerTy()));
10276 SDValue Perm = DAG.getNode(X86ISD::VPERMV, dl, VecVT, Mask, Vec);
10277 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, Op.getValueType(),
10278 Perm, DAG.getConstant(0, getPointerTy()));
10283 // If this is a 256-bit vector result, first extract the 128-bit vector and
10284 // then extract the element from the 128-bit vector.
10285 if (VecVT.is256BitVector() || VecVT.is512BitVector()) {
10287 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
10288 // Get the 128-bit vector.
10289 Vec = Extract128BitVector(Vec, IdxVal, DAG, dl);
10290 MVT EltVT = VecVT.getVectorElementType();
10292 unsigned ElemsPerChunk = 128 / EltVT.getSizeInBits();
10294 //if (IdxVal >= NumElems/2)
10295 // IdxVal -= NumElems/2;
10296 IdxVal -= (IdxVal/ElemsPerChunk)*ElemsPerChunk;
10297 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, Op.getValueType(), Vec,
10298 DAG.getConstant(IdxVal, MVT::i32));
10301 assert(VecVT.is128BitVector() && "Unexpected vector length");
10303 if (Subtarget->hasSSE41()) {
10304 SDValue Res = LowerEXTRACT_VECTOR_ELT_SSE4(Op, DAG);
10309 MVT VT = Op.getSimpleValueType();
10310 // TODO: handle v16i8.
10311 if (VT.getSizeInBits() == 16) {
10312 SDValue Vec = Op.getOperand(0);
10313 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
10315 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
10316 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
10317 DAG.getNode(ISD::BITCAST, dl,
10319 Op.getOperand(1)));
10320 // Transform it so it match pextrw which produces a 32-bit result.
10321 MVT EltVT = MVT::i32;
10322 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, EltVT,
10323 Op.getOperand(0), Op.getOperand(1));
10324 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, EltVT, Extract,
10325 DAG.getValueType(VT));
10326 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
10329 if (VT.getSizeInBits() == 32) {
10330 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
10334 // SHUFPS the element to the lowest double word, then movss.
10335 int Mask[4] = { static_cast<int>(Idx), -1, -1, -1 };
10336 MVT VVT = Op.getOperand(0).getSimpleValueType();
10337 SDValue Vec = DAG.getVectorShuffle(VVT, dl, Op.getOperand(0),
10338 DAG.getUNDEF(VVT), Mask);
10339 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
10340 DAG.getIntPtrConstant(0));
10343 if (VT.getSizeInBits() == 64) {
10344 // FIXME: .td only matches this for <2 x f64>, not <2 x i64> on 32b
10345 // FIXME: seems like this should be unnecessary if mov{h,l}pd were taught
10346 // to match extract_elt for f64.
10347 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
10351 // UNPCKHPD the element to the lowest double word, then movsd.
10352 // Note if the lower 64 bits of the result of the UNPCKHPD is then stored
10353 // to a f64mem, the whole operation is folded into a single MOVHPDmr.
10354 int Mask[2] = { 1, -1 };
10355 MVT VVT = Op.getOperand(0).getSimpleValueType();
10356 SDValue Vec = DAG.getVectorShuffle(VVT, dl, Op.getOperand(0),
10357 DAG.getUNDEF(VVT), Mask);
10358 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
10359 DAG.getIntPtrConstant(0));
10365 static SDValue LowerINSERT_VECTOR_ELT_SSE4(SDValue Op, SelectionDAG &DAG) {
10366 MVT VT = Op.getSimpleValueType();
10367 MVT EltVT = VT.getVectorElementType();
10370 SDValue N0 = Op.getOperand(0);
10371 SDValue N1 = Op.getOperand(1);
10372 SDValue N2 = Op.getOperand(2);
10374 if (!VT.is128BitVector())
10377 if ((EltVT.getSizeInBits() == 8 || EltVT.getSizeInBits() == 16) &&
10378 isa<ConstantSDNode>(N2)) {
10380 if (VT == MVT::v8i16)
10381 Opc = X86ISD::PINSRW;
10382 else if (VT == MVT::v16i8)
10383 Opc = X86ISD::PINSRB;
10385 Opc = X86ISD::PINSRB;
10387 // Transform it so it match pinsr{b,w} which expects a GR32 as its second
10389 if (N1.getValueType() != MVT::i32)
10390 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
10391 if (N2.getValueType() != MVT::i32)
10392 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
10393 return DAG.getNode(Opc, dl, VT, N0, N1, N2);
10396 if (EltVT == MVT::f32 && isa<ConstantSDNode>(N2)) {
10397 // Bits [7:6] of the constant are the source select. This will always be
10398 // zero here. The DAG Combiner may combine an extract_elt index into these
10399 // bits. For example (insert (extract, 3), 2) could be matched by putting
10400 // the '3' into bits [7:6] of X86ISD::INSERTPS.
10401 // Bits [5:4] of the constant are the destination select. This is the
10402 // value of the incoming immediate.
10403 // Bits [3:0] of the constant are the zero mask. The DAG Combiner may
10404 // combine either bitwise AND or insert of float 0.0 to set these bits.
10405 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue() << 4);
10406 // Create this as a scalar to vector..
10407 N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4f32, N1);
10408 return DAG.getNode(X86ISD::INSERTPS, dl, VT, N0, N1, N2);
10411 if ((EltVT == MVT::i32 || EltVT == MVT::i64) && isa<ConstantSDNode>(N2)) {
10412 // PINSR* works with constant index.
10418 /// Insert one bit to mask vector, like v16i1 or v8i1.
10419 /// AVX-512 feature.
10421 X86TargetLowering::InsertBitToMaskVector(SDValue Op, SelectionDAG &DAG) const {
10423 SDValue Vec = Op.getOperand(0);
10424 SDValue Elt = Op.getOperand(1);
10425 SDValue Idx = Op.getOperand(2);
10426 MVT VecVT = Vec.getSimpleValueType();
10428 if (!isa<ConstantSDNode>(Idx)) {
10429 // Non constant index. Extend source and destination,
10430 // insert element and then truncate the result.
10431 MVT ExtVecVT = (VecVT == MVT::v8i1 ? MVT::v8i64 : MVT::v16i32);
10432 MVT ExtEltVT = (VecVT == MVT::v8i1 ? MVT::i64 : MVT::i32);
10433 SDValue ExtOp = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, ExtVecVT,
10434 DAG.getNode(ISD::ZERO_EXTEND, dl, ExtVecVT, Vec),
10435 DAG.getNode(ISD::ZERO_EXTEND, dl, ExtEltVT, Elt), Idx);
10436 return DAG.getNode(ISD::TRUNCATE, dl, VecVT, ExtOp);
10439 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
10440 SDValue EltInVec = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VecVT, Elt);
10441 if (Vec.getOpcode() == ISD::UNDEF)
10442 return DAG.getNode(X86ISD::VSHLI, dl, VecVT, EltInVec,
10443 DAG.getConstant(IdxVal, MVT::i8));
10444 const TargetRegisterClass* rc = getRegClassFor(VecVT);
10445 unsigned MaxSift = rc->getSize()*8 - 1;
10446 EltInVec = DAG.getNode(X86ISD::VSHLI, dl, VecVT, EltInVec,
10447 DAG.getConstant(MaxSift, MVT::i8));
10448 EltInVec = DAG.getNode(X86ISD::VSRLI, dl, VecVT, EltInVec,
10449 DAG.getConstant(MaxSift - IdxVal, MVT::i8));
10450 return DAG.getNode(ISD::OR, dl, VecVT, Vec, EltInVec);
10453 X86TargetLowering::LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const {
10454 MVT VT = Op.getSimpleValueType();
10455 MVT EltVT = VT.getVectorElementType();
10457 if (EltVT == MVT::i1)
10458 return InsertBitToMaskVector(Op, DAG);
10461 SDValue N0 = Op.getOperand(0);
10462 SDValue N1 = Op.getOperand(1);
10463 SDValue N2 = Op.getOperand(2);
10465 // If this is a 256-bit vector result, first extract the 128-bit vector,
10466 // insert the element into the extracted half and then place it back.
10467 if (VT.is256BitVector() || VT.is512BitVector()) {
10468 if (!isa<ConstantSDNode>(N2))
10471 // Get the desired 128-bit vector half.
10472 unsigned IdxVal = cast<ConstantSDNode>(N2)->getZExtValue();
10473 SDValue V = Extract128BitVector(N0, IdxVal, DAG, dl);
10475 // Insert the element into the desired half.
10476 unsigned NumEltsIn128 = 128/EltVT.getSizeInBits();
10477 unsigned IdxIn128 = IdxVal - (IdxVal/NumEltsIn128) * NumEltsIn128;
10479 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, V.getValueType(), V, N1,
10480 DAG.getConstant(IdxIn128, MVT::i32));
10482 // Insert the changed part back to the 256-bit vector
10483 return Insert128BitVector(N0, V, IdxVal, DAG, dl);
10486 if (Subtarget->hasSSE41())
10487 return LowerINSERT_VECTOR_ELT_SSE4(Op, DAG);
10489 if (EltVT == MVT::i8)
10492 if (EltVT.getSizeInBits() == 16 && isa<ConstantSDNode>(N2)) {
10493 // Transform it so it match pinsrw which expects a 16-bit value in a GR32
10494 // as its second argument.
10495 if (N1.getValueType() != MVT::i32)
10496 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
10497 if (N2.getValueType() != MVT::i32)
10498 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
10499 return DAG.getNode(X86ISD::PINSRW, dl, VT, N0, N1, N2);
10504 static SDValue LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) {
10506 MVT OpVT = Op.getSimpleValueType();
10508 // If this is a 256-bit vector result, first insert into a 128-bit
10509 // vector and then insert into the 256-bit vector.
10510 if (!OpVT.is128BitVector()) {
10511 // Insert into a 128-bit vector.
10512 unsigned SizeFactor = OpVT.getSizeInBits()/128;
10513 MVT VT128 = MVT::getVectorVT(OpVT.getVectorElementType(),
10514 OpVT.getVectorNumElements() / SizeFactor);
10516 Op = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT128, Op.getOperand(0));
10518 // Insert the 128-bit vector.
10519 return Insert128BitVector(DAG.getUNDEF(OpVT), Op, 0, DAG, dl);
10522 if (OpVT == MVT::v1i64 &&
10523 Op.getOperand(0).getValueType() == MVT::i64)
10524 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v1i64, Op.getOperand(0));
10526 SDValue AnyExt = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, Op.getOperand(0));
10527 assert(OpVT.is128BitVector() && "Expected an SSE type!");
10528 return DAG.getNode(ISD::BITCAST, dl, OpVT,
10529 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,AnyExt));
10532 // Lower a node with an EXTRACT_SUBVECTOR opcode. This may result in
10533 // a simple subregister reference or explicit instructions to grab
10534 // upper bits of a vector.
10535 static SDValue LowerEXTRACT_SUBVECTOR(SDValue Op, const X86Subtarget *Subtarget,
10536 SelectionDAG &DAG) {
10538 SDValue In = Op.getOperand(0);
10539 SDValue Idx = Op.getOperand(1);
10540 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
10541 MVT ResVT = Op.getSimpleValueType();
10542 MVT InVT = In.getSimpleValueType();
10544 if (Subtarget->hasFp256()) {
10545 if (ResVT.is128BitVector() &&
10546 (InVT.is256BitVector() || InVT.is512BitVector()) &&
10547 isa<ConstantSDNode>(Idx)) {
10548 return Extract128BitVector(In, IdxVal, DAG, dl);
10550 if (ResVT.is256BitVector() && InVT.is512BitVector() &&
10551 isa<ConstantSDNode>(Idx)) {
10552 return Extract256BitVector(In, IdxVal, DAG, dl);
10558 // Lower a node with an INSERT_SUBVECTOR opcode. This may result in a
10559 // simple superregister reference or explicit instructions to insert
10560 // the upper bits of a vector.
10561 static SDValue LowerINSERT_SUBVECTOR(SDValue Op, const X86Subtarget *Subtarget,
10562 SelectionDAG &DAG) {
10563 if (Subtarget->hasFp256()) {
10564 SDLoc dl(Op.getNode());
10565 SDValue Vec = Op.getNode()->getOperand(0);
10566 SDValue SubVec = Op.getNode()->getOperand(1);
10567 SDValue Idx = Op.getNode()->getOperand(2);
10569 if ((Op.getNode()->getSimpleValueType(0).is256BitVector() ||
10570 Op.getNode()->getSimpleValueType(0).is512BitVector()) &&
10571 SubVec.getNode()->getSimpleValueType(0).is128BitVector() &&
10572 isa<ConstantSDNode>(Idx)) {
10573 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
10574 return Insert128BitVector(Vec, SubVec, IdxVal, DAG, dl);
10577 if (Op.getNode()->getSimpleValueType(0).is512BitVector() &&
10578 SubVec.getNode()->getSimpleValueType(0).is256BitVector() &&
10579 isa<ConstantSDNode>(Idx)) {
10580 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
10581 return Insert256BitVector(Vec, SubVec, IdxVal, DAG, dl);
10587 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
10588 // their target countpart wrapped in the X86ISD::Wrapper node. Suppose N is
10589 // one of the above mentioned nodes. It has to be wrapped because otherwise
10590 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
10591 // be used to form addressing mode. These wrapped nodes will be selected
10594 X86TargetLowering::LowerConstantPool(SDValue Op, SelectionDAG &DAG) const {
10595 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
10597 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
10598 // global base reg.
10599 unsigned char OpFlag = 0;
10600 unsigned WrapperKind = X86ISD::Wrapper;
10601 CodeModel::Model M = DAG.getTarget().getCodeModel();
10603 if (Subtarget->isPICStyleRIPRel() &&
10604 (M == CodeModel::Small || M == CodeModel::Kernel))
10605 WrapperKind = X86ISD::WrapperRIP;
10606 else if (Subtarget->isPICStyleGOT())
10607 OpFlag = X86II::MO_GOTOFF;
10608 else if (Subtarget->isPICStyleStubPIC())
10609 OpFlag = X86II::MO_PIC_BASE_OFFSET;
10611 SDValue Result = DAG.getTargetConstantPool(CP->getConstVal(), getPointerTy(),
10612 CP->getAlignment(),
10613 CP->getOffset(), OpFlag);
10615 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
10616 // With PIC, the address is actually $g + Offset.
10618 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
10619 DAG.getNode(X86ISD::GlobalBaseReg,
10620 SDLoc(), getPointerTy()),
10627 SDValue X86TargetLowering::LowerJumpTable(SDValue Op, SelectionDAG &DAG) const {
10628 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
10630 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
10631 // global base reg.
10632 unsigned char OpFlag = 0;
10633 unsigned WrapperKind = X86ISD::Wrapper;
10634 CodeModel::Model M = DAG.getTarget().getCodeModel();
10636 if (Subtarget->isPICStyleRIPRel() &&
10637 (M == CodeModel::Small || M == CodeModel::Kernel))
10638 WrapperKind = X86ISD::WrapperRIP;
10639 else if (Subtarget->isPICStyleGOT())
10640 OpFlag = X86II::MO_GOTOFF;
10641 else if (Subtarget->isPICStyleStubPIC())
10642 OpFlag = X86II::MO_PIC_BASE_OFFSET;
10644 SDValue Result = DAG.getTargetJumpTable(JT->getIndex(), getPointerTy(),
10647 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
10649 // With PIC, the address is actually $g + Offset.
10651 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
10652 DAG.getNode(X86ISD::GlobalBaseReg,
10653 SDLoc(), getPointerTy()),
10660 X86TargetLowering::LowerExternalSymbol(SDValue Op, SelectionDAG &DAG) const {
10661 const char *Sym = cast<ExternalSymbolSDNode>(Op)->getSymbol();
10663 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
10664 // global base reg.
10665 unsigned char OpFlag = 0;
10666 unsigned WrapperKind = X86ISD::Wrapper;
10667 CodeModel::Model M = DAG.getTarget().getCodeModel();
10669 if (Subtarget->isPICStyleRIPRel() &&
10670 (M == CodeModel::Small || M == CodeModel::Kernel)) {
10671 if (Subtarget->isTargetDarwin() || Subtarget->isTargetELF())
10672 OpFlag = X86II::MO_GOTPCREL;
10673 WrapperKind = X86ISD::WrapperRIP;
10674 } else if (Subtarget->isPICStyleGOT()) {
10675 OpFlag = X86II::MO_GOT;
10676 } else if (Subtarget->isPICStyleStubPIC()) {
10677 OpFlag = X86II::MO_DARWIN_NONLAZY_PIC_BASE;
10678 } else if (Subtarget->isPICStyleStubNoDynamic()) {
10679 OpFlag = X86II::MO_DARWIN_NONLAZY;
10682 SDValue Result = DAG.getTargetExternalSymbol(Sym, getPointerTy(), OpFlag);
10685 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
10687 // With PIC, the address is actually $g + Offset.
10688 if (DAG.getTarget().getRelocationModel() == Reloc::PIC_ &&
10689 !Subtarget->is64Bit()) {
10690 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
10691 DAG.getNode(X86ISD::GlobalBaseReg,
10692 SDLoc(), getPointerTy()),
10696 // For symbols that require a load from a stub to get the address, emit the
10698 if (isGlobalStubReference(OpFlag))
10699 Result = DAG.getLoad(getPointerTy(), DL, DAG.getEntryNode(), Result,
10700 MachinePointerInfo::getGOT(), false, false, false, 0);
10706 X86TargetLowering::LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const {
10707 // Create the TargetBlockAddressAddress node.
10708 unsigned char OpFlags =
10709 Subtarget->ClassifyBlockAddressReference();
10710 CodeModel::Model M = DAG.getTarget().getCodeModel();
10711 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
10712 int64_t Offset = cast<BlockAddressSDNode>(Op)->getOffset();
10714 SDValue Result = DAG.getTargetBlockAddress(BA, getPointerTy(), Offset,
10717 if (Subtarget->isPICStyleRIPRel() &&
10718 (M == CodeModel::Small || M == CodeModel::Kernel))
10719 Result = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Result);
10721 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
10723 // With PIC, the address is actually $g + Offset.
10724 if (isGlobalRelativeToPICBase(OpFlags)) {
10725 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
10726 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
10734 X86TargetLowering::LowerGlobalAddress(const GlobalValue *GV, SDLoc dl,
10735 int64_t Offset, SelectionDAG &DAG) const {
10736 // Create the TargetGlobalAddress node, folding in the constant
10737 // offset if it is legal.
10738 unsigned char OpFlags =
10739 Subtarget->ClassifyGlobalReference(GV, DAG.getTarget());
10740 CodeModel::Model M = DAG.getTarget().getCodeModel();
10742 if (OpFlags == X86II::MO_NO_FLAG &&
10743 X86::isOffsetSuitableForCodeModel(Offset, M)) {
10744 // A direct static reference to a global.
10745 Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), Offset);
10748 Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), 0, OpFlags);
10751 if (Subtarget->isPICStyleRIPRel() &&
10752 (M == CodeModel::Small || M == CodeModel::Kernel))
10753 Result = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Result);
10755 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
10757 // With PIC, the address is actually $g + Offset.
10758 if (isGlobalRelativeToPICBase(OpFlags)) {
10759 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
10760 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
10764 // For globals that require a load from a stub to get the address, emit the
10766 if (isGlobalStubReference(OpFlags))
10767 Result = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(), Result,
10768 MachinePointerInfo::getGOT(), false, false, false, 0);
10770 // If there was a non-zero offset that we didn't fold, create an explicit
10771 // addition for it.
10773 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(), Result,
10774 DAG.getConstant(Offset, getPointerTy()));
10780 X86TargetLowering::LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const {
10781 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
10782 int64_t Offset = cast<GlobalAddressSDNode>(Op)->getOffset();
10783 return LowerGlobalAddress(GV, SDLoc(Op), Offset, DAG);
10787 GetTLSADDR(SelectionDAG &DAG, SDValue Chain, GlobalAddressSDNode *GA,
10788 SDValue *InFlag, const EVT PtrVT, unsigned ReturnReg,
10789 unsigned char OperandFlags, bool LocalDynamic = false) {
10790 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
10791 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
10793 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
10794 GA->getValueType(0),
10798 X86ISD::NodeType CallType = LocalDynamic ? X86ISD::TLSBASEADDR
10802 SDValue Ops[] = { Chain, TGA, *InFlag };
10803 Chain = DAG.getNode(CallType, dl, NodeTys, Ops);
10805 SDValue Ops[] = { Chain, TGA };
10806 Chain = DAG.getNode(CallType, dl, NodeTys, Ops);
10809 // TLSADDR will be codegen'ed as call. Inform MFI that function has calls.
10810 MFI->setAdjustsStack(true);
10812 SDValue Flag = Chain.getValue(1);
10813 return DAG.getCopyFromReg(Chain, dl, ReturnReg, PtrVT, Flag);
10816 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 32 bit
10818 LowerToTLSGeneralDynamicModel32(GlobalAddressSDNode *GA, SelectionDAG &DAG,
10821 SDLoc dl(GA); // ? function entry point might be better
10822 SDValue Chain = DAG.getCopyToReg(DAG.getEntryNode(), dl, X86::EBX,
10823 DAG.getNode(X86ISD::GlobalBaseReg,
10824 SDLoc(), PtrVT), InFlag);
10825 InFlag = Chain.getValue(1);
10827 return GetTLSADDR(DAG, Chain, GA, &InFlag, PtrVT, X86::EAX, X86II::MO_TLSGD);
10830 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 64 bit
10832 LowerToTLSGeneralDynamicModel64(GlobalAddressSDNode *GA, SelectionDAG &DAG,
10834 return GetTLSADDR(DAG, DAG.getEntryNode(), GA, nullptr, PtrVT,
10835 X86::RAX, X86II::MO_TLSGD);
10838 static SDValue LowerToTLSLocalDynamicModel(GlobalAddressSDNode *GA,
10844 // Get the start address of the TLS block for this module.
10845 X86MachineFunctionInfo* MFI = DAG.getMachineFunction()
10846 .getInfo<X86MachineFunctionInfo>();
10847 MFI->incNumLocalDynamicTLSAccesses();
10851 Base = GetTLSADDR(DAG, DAG.getEntryNode(), GA, nullptr, PtrVT, X86::RAX,
10852 X86II::MO_TLSLD, /*LocalDynamic=*/true);
10855 SDValue Chain = DAG.getCopyToReg(DAG.getEntryNode(), dl, X86::EBX,
10856 DAG.getNode(X86ISD::GlobalBaseReg, SDLoc(), PtrVT), InFlag);
10857 InFlag = Chain.getValue(1);
10858 Base = GetTLSADDR(DAG, Chain, GA, &InFlag, PtrVT, X86::EAX,
10859 X86II::MO_TLSLDM, /*LocalDynamic=*/true);
10862 // Note: the CleanupLocalDynamicTLSPass will remove redundant computations
10866 unsigned char OperandFlags = X86II::MO_DTPOFF;
10867 unsigned WrapperKind = X86ISD::Wrapper;
10868 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
10869 GA->getValueType(0),
10870 GA->getOffset(), OperandFlags);
10871 SDValue Offset = DAG.getNode(WrapperKind, dl, PtrVT, TGA);
10873 // Add x@dtpoff with the base.
10874 return DAG.getNode(ISD::ADD, dl, PtrVT, Offset, Base);
10877 // Lower ISD::GlobalTLSAddress using the "initial exec" or "local exec" model.
10878 static SDValue LowerToTLSExecModel(GlobalAddressSDNode *GA, SelectionDAG &DAG,
10879 const EVT PtrVT, TLSModel::Model model,
10880 bool is64Bit, bool isPIC) {
10883 // Get the Thread Pointer, which is %gs:0 (32-bit) or %fs:0 (64-bit).
10884 Value *Ptr = Constant::getNullValue(Type::getInt8PtrTy(*DAG.getContext(),
10885 is64Bit ? 257 : 256));
10887 SDValue ThreadPointer =
10888 DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), DAG.getIntPtrConstant(0),
10889 MachinePointerInfo(Ptr), false, false, false, 0);
10891 unsigned char OperandFlags = 0;
10892 // Most TLS accesses are not RIP relative, even on x86-64. One exception is
10894 unsigned WrapperKind = X86ISD::Wrapper;
10895 if (model == TLSModel::LocalExec) {
10896 OperandFlags = is64Bit ? X86II::MO_TPOFF : X86II::MO_NTPOFF;
10897 } else if (model == TLSModel::InitialExec) {
10899 OperandFlags = X86II::MO_GOTTPOFF;
10900 WrapperKind = X86ISD::WrapperRIP;
10902 OperandFlags = isPIC ? X86II::MO_GOTNTPOFF : X86II::MO_INDNTPOFF;
10905 llvm_unreachable("Unexpected model");
10908 // emit "addl x@ntpoff,%eax" (local exec)
10909 // or "addl x@indntpoff,%eax" (initial exec)
10910 // or "addl x@gotntpoff(%ebx) ,%eax" (initial exec, 32-bit pic)
10912 DAG.getTargetGlobalAddress(GA->getGlobal(), dl, GA->getValueType(0),
10913 GA->getOffset(), OperandFlags);
10914 SDValue Offset = DAG.getNode(WrapperKind, dl, PtrVT, TGA);
10916 if (model == TLSModel::InitialExec) {
10917 if (isPIC && !is64Bit) {
10918 Offset = DAG.getNode(ISD::ADD, dl, PtrVT,
10919 DAG.getNode(X86ISD::GlobalBaseReg, SDLoc(), PtrVT),
10923 Offset = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Offset,
10924 MachinePointerInfo::getGOT(), false, false, false, 0);
10927 // The address of the thread local variable is the add of the thread
10928 // pointer with the offset of the variable.
10929 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
10933 X86TargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const {
10935 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
10936 const GlobalValue *GV = GA->getGlobal();
10938 if (Subtarget->isTargetELF()) {
10939 TLSModel::Model model = DAG.getTarget().getTLSModel(GV);
10942 case TLSModel::GeneralDynamic:
10943 if (Subtarget->is64Bit())
10944 return LowerToTLSGeneralDynamicModel64(GA, DAG, getPointerTy());
10945 return LowerToTLSGeneralDynamicModel32(GA, DAG, getPointerTy());
10946 case TLSModel::LocalDynamic:
10947 return LowerToTLSLocalDynamicModel(GA, DAG, getPointerTy(),
10948 Subtarget->is64Bit());
10949 case TLSModel::InitialExec:
10950 case TLSModel::LocalExec:
10951 return LowerToTLSExecModel(
10952 GA, DAG, getPointerTy(), model, Subtarget->is64Bit(),
10953 DAG.getTarget().getRelocationModel() == Reloc::PIC_);
10955 llvm_unreachable("Unknown TLS model.");
10958 if (Subtarget->isTargetDarwin()) {
10959 // Darwin only has one model of TLS. Lower to that.
10960 unsigned char OpFlag = 0;
10961 unsigned WrapperKind = Subtarget->isPICStyleRIPRel() ?
10962 X86ISD::WrapperRIP : X86ISD::Wrapper;
10964 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
10965 // global base reg.
10966 bool PIC32 = (DAG.getTarget().getRelocationModel() == Reloc::PIC_) &&
10967 !Subtarget->is64Bit();
10969 OpFlag = X86II::MO_TLVP_PIC_BASE;
10971 OpFlag = X86II::MO_TLVP;
10973 SDValue Result = DAG.getTargetGlobalAddress(GA->getGlobal(), DL,
10974 GA->getValueType(0),
10975 GA->getOffset(), OpFlag);
10976 SDValue Offset = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
10978 // With PIC32, the address is actually $g + Offset.
10980 Offset = DAG.getNode(ISD::ADD, DL, getPointerTy(),
10981 DAG.getNode(X86ISD::GlobalBaseReg,
10982 SDLoc(), getPointerTy()),
10985 // Lowering the machine isd will make sure everything is in the right
10987 SDValue Chain = DAG.getEntryNode();
10988 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
10989 SDValue Args[] = { Chain, Offset };
10990 Chain = DAG.getNode(X86ISD::TLSCALL, DL, NodeTys, Args);
10992 // TLSCALL will be codegen'ed as call. Inform MFI that function has calls.
10993 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
10994 MFI->setAdjustsStack(true);
10996 // And our return value (tls address) is in the standard call return value
10998 unsigned Reg = Subtarget->is64Bit() ? X86::RAX : X86::EAX;
10999 return DAG.getCopyFromReg(Chain, DL, Reg, getPointerTy(),
11000 Chain.getValue(1));
11003 if (Subtarget->isTargetKnownWindowsMSVC() ||
11004 Subtarget->isTargetWindowsGNU()) {
11005 // Just use the implicit TLS architecture
11006 // Need to generate someting similar to:
11007 // mov rdx, qword [gs:abs 58H]; Load pointer to ThreadLocalStorage
11009 // mov ecx, dword [rel _tls_index]: Load index (from C runtime)
11010 // mov rcx, qword [rdx+rcx*8]
11011 // mov eax, .tls$:tlsvar
11012 // [rax+rcx] contains the address
11013 // Windows 64bit: gs:0x58
11014 // Windows 32bit: fs:__tls_array
11017 SDValue Chain = DAG.getEntryNode();
11019 // Get the Thread Pointer, which is %fs:__tls_array (32-bit) or
11020 // %gs:0x58 (64-bit). On MinGW, __tls_array is not available, so directly
11021 // use its literal value of 0x2C.
11022 Value *Ptr = Constant::getNullValue(Subtarget->is64Bit()
11023 ? Type::getInt8PtrTy(*DAG.getContext(),
11025 : Type::getInt32PtrTy(*DAG.getContext(),
11029 Subtarget->is64Bit()
11030 ? DAG.getIntPtrConstant(0x58)
11031 : (Subtarget->isTargetWindowsGNU()
11032 ? DAG.getIntPtrConstant(0x2C)
11033 : DAG.getExternalSymbol("_tls_array", getPointerTy()));
11035 SDValue ThreadPointer =
11036 DAG.getLoad(getPointerTy(), dl, Chain, TlsArray,
11037 MachinePointerInfo(Ptr), false, false, false, 0);
11039 // Load the _tls_index variable
11040 SDValue IDX = DAG.getExternalSymbol("_tls_index", getPointerTy());
11041 if (Subtarget->is64Bit())
11042 IDX = DAG.getExtLoad(ISD::ZEXTLOAD, dl, getPointerTy(), Chain,
11043 IDX, MachinePointerInfo(), MVT::i32,
11044 false, false, false, 0);
11046 IDX = DAG.getLoad(getPointerTy(), dl, Chain, IDX, MachinePointerInfo(),
11047 false, false, false, 0);
11049 SDValue Scale = DAG.getConstant(Log2_64_Ceil(TD->getPointerSize()),
11051 IDX = DAG.getNode(ISD::SHL, dl, getPointerTy(), IDX, Scale);
11053 SDValue res = DAG.getNode(ISD::ADD, dl, getPointerTy(), ThreadPointer, IDX);
11054 res = DAG.getLoad(getPointerTy(), dl, Chain, res, MachinePointerInfo(),
11055 false, false, false, 0);
11057 // Get the offset of start of .tls section
11058 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
11059 GA->getValueType(0),
11060 GA->getOffset(), X86II::MO_SECREL);
11061 SDValue Offset = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), TGA);
11063 // The address of the thread local variable is the add of the thread
11064 // pointer with the offset of the variable.
11065 return DAG.getNode(ISD::ADD, dl, getPointerTy(), res, Offset);
11068 llvm_unreachable("TLS not implemented for this target.");
11071 /// LowerShiftParts - Lower SRA_PARTS and friends, which return two i32 values
11072 /// and take a 2 x i32 value to shift plus a shift amount.
11073 static SDValue LowerShiftParts(SDValue Op, SelectionDAG &DAG) {
11074 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
11075 MVT VT = Op.getSimpleValueType();
11076 unsigned VTBits = VT.getSizeInBits();
11078 bool isSRA = Op.getOpcode() == ISD::SRA_PARTS;
11079 SDValue ShOpLo = Op.getOperand(0);
11080 SDValue ShOpHi = Op.getOperand(1);
11081 SDValue ShAmt = Op.getOperand(2);
11082 // X86ISD::SHLD and X86ISD::SHRD have defined overflow behavior but the
11083 // generic ISD nodes haven't. Insert an AND to be safe, it's optimized away
11085 SDValue SafeShAmt = DAG.getNode(ISD::AND, dl, MVT::i8, ShAmt,
11086 DAG.getConstant(VTBits - 1, MVT::i8));
11087 SDValue Tmp1 = isSRA ? DAG.getNode(ISD::SRA, dl, VT, ShOpHi,
11088 DAG.getConstant(VTBits - 1, MVT::i8))
11089 : DAG.getConstant(0, VT);
11091 SDValue Tmp2, Tmp3;
11092 if (Op.getOpcode() == ISD::SHL_PARTS) {
11093 Tmp2 = DAG.getNode(X86ISD::SHLD, dl, VT, ShOpHi, ShOpLo, ShAmt);
11094 Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, SafeShAmt);
11096 Tmp2 = DAG.getNode(X86ISD::SHRD, dl, VT, ShOpLo, ShOpHi, ShAmt);
11097 Tmp3 = DAG.getNode(isSRA ? ISD::SRA : ISD::SRL, dl, VT, ShOpHi, SafeShAmt);
11100 // If the shift amount is larger or equal than the width of a part we can't
11101 // rely on the results of shld/shrd. Insert a test and select the appropriate
11102 // values for large shift amounts.
11103 SDValue AndNode = DAG.getNode(ISD::AND, dl, MVT::i8, ShAmt,
11104 DAG.getConstant(VTBits, MVT::i8));
11105 SDValue Cond = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
11106 AndNode, DAG.getConstant(0, MVT::i8));
11109 SDValue CC = DAG.getConstant(X86::COND_NE, MVT::i8);
11110 SDValue Ops0[4] = { Tmp2, Tmp3, CC, Cond };
11111 SDValue Ops1[4] = { Tmp3, Tmp1, CC, Cond };
11113 if (Op.getOpcode() == ISD::SHL_PARTS) {
11114 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0);
11115 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1);
11117 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0);
11118 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1);
11121 SDValue Ops[2] = { Lo, Hi };
11122 return DAG.getMergeValues(Ops, dl);
11125 SDValue X86TargetLowering::LowerSINT_TO_FP(SDValue Op,
11126 SelectionDAG &DAG) const {
11127 MVT SrcVT = Op.getOperand(0).getSimpleValueType();
11129 if (SrcVT.isVector())
11132 assert(SrcVT <= MVT::i64 && SrcVT >= MVT::i16 &&
11133 "Unknown SINT_TO_FP to lower!");
11135 // These are really Legal; return the operand so the caller accepts it as
11137 if (SrcVT == MVT::i32 && isScalarFPTypeInSSEReg(Op.getValueType()))
11139 if (SrcVT == MVT::i64 && isScalarFPTypeInSSEReg(Op.getValueType()) &&
11140 Subtarget->is64Bit()) {
11145 unsigned Size = SrcVT.getSizeInBits()/8;
11146 MachineFunction &MF = DAG.getMachineFunction();
11147 int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size, false);
11148 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
11149 SDValue Chain = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
11151 MachinePointerInfo::getFixedStack(SSFI),
11153 return BuildFILD(Op, SrcVT, Chain, StackSlot, DAG);
11156 SDValue X86TargetLowering::BuildFILD(SDValue Op, EVT SrcVT, SDValue Chain,
11158 SelectionDAG &DAG) const {
11162 bool useSSE = isScalarFPTypeInSSEReg(Op.getValueType());
11164 Tys = DAG.getVTList(MVT::f64, MVT::Other, MVT::Glue);
11166 Tys = DAG.getVTList(Op.getValueType(), MVT::Other);
11168 unsigned ByteSize = SrcVT.getSizeInBits()/8;
11170 FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(StackSlot);
11171 MachineMemOperand *MMO;
11173 int SSFI = FI->getIndex();
11175 DAG.getMachineFunction()
11176 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
11177 MachineMemOperand::MOLoad, ByteSize, ByteSize);
11179 MMO = cast<LoadSDNode>(StackSlot)->getMemOperand();
11180 StackSlot = StackSlot.getOperand(1);
11182 SDValue Ops[] = { Chain, StackSlot, DAG.getValueType(SrcVT) };
11183 SDValue Result = DAG.getMemIntrinsicNode(useSSE ? X86ISD::FILD_FLAG :
11185 Tys, Ops, SrcVT, MMO);
11188 Chain = Result.getValue(1);
11189 SDValue InFlag = Result.getValue(2);
11191 // FIXME: Currently the FST is flagged to the FILD_FLAG. This
11192 // shouldn't be necessary except that RFP cannot be live across
11193 // multiple blocks. When stackifier is fixed, they can be uncoupled.
11194 MachineFunction &MF = DAG.getMachineFunction();
11195 unsigned SSFISize = Op.getValueType().getSizeInBits()/8;
11196 int SSFI = MF.getFrameInfo()->CreateStackObject(SSFISize, SSFISize, false);
11197 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
11198 Tys = DAG.getVTList(MVT::Other);
11200 Chain, Result, StackSlot, DAG.getValueType(Op.getValueType()), InFlag
11202 MachineMemOperand *MMO =
11203 DAG.getMachineFunction()
11204 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
11205 MachineMemOperand::MOStore, SSFISize, SSFISize);
11207 Chain = DAG.getMemIntrinsicNode(X86ISD::FST, DL, Tys,
11208 Ops, Op.getValueType(), MMO);
11209 Result = DAG.getLoad(Op.getValueType(), DL, Chain, StackSlot,
11210 MachinePointerInfo::getFixedStack(SSFI),
11211 false, false, false, 0);
11217 // LowerUINT_TO_FP_i64 - 64-bit unsigned integer to double expansion.
11218 SDValue X86TargetLowering::LowerUINT_TO_FP_i64(SDValue Op,
11219 SelectionDAG &DAG) const {
11220 // This algorithm is not obvious. Here it is what we're trying to output:
11223 punpckldq (c0), %xmm0 // c0: (uint4){ 0x43300000U, 0x45300000U, 0U, 0U }
11224 subpd (c1), %xmm0 // c1: (double2){ 0x1.0p52, 0x1.0p52 * 0x1.0p32 }
11226 haddpd %xmm0, %xmm0
11228 pshufd $0x4e, %xmm0, %xmm1
11234 LLVMContext *Context = DAG.getContext();
11236 // Build some magic constants.
11237 static const uint32_t CV0[] = { 0x43300000, 0x45300000, 0, 0 };
11238 Constant *C0 = ConstantDataVector::get(*Context, CV0);
11239 SDValue CPIdx0 = DAG.getConstantPool(C0, getPointerTy(), 16);
11241 SmallVector<Constant*,2> CV1;
11243 ConstantFP::get(*Context, APFloat(APFloat::IEEEdouble,
11244 APInt(64, 0x4330000000000000ULL))));
11246 ConstantFP::get(*Context, APFloat(APFloat::IEEEdouble,
11247 APInt(64, 0x4530000000000000ULL))));
11248 Constant *C1 = ConstantVector::get(CV1);
11249 SDValue CPIdx1 = DAG.getConstantPool(C1, getPointerTy(), 16);
11251 // Load the 64-bit value into an XMM register.
11252 SDValue XR1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64,
11254 SDValue CLod0 = DAG.getLoad(MVT::v4i32, dl, DAG.getEntryNode(), CPIdx0,
11255 MachinePointerInfo::getConstantPool(),
11256 false, false, false, 16);
11257 SDValue Unpck1 = getUnpackl(DAG, dl, MVT::v4i32,
11258 DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, XR1),
11261 SDValue CLod1 = DAG.getLoad(MVT::v2f64, dl, CLod0.getValue(1), CPIdx1,
11262 MachinePointerInfo::getConstantPool(),
11263 false, false, false, 16);
11264 SDValue XR2F = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Unpck1);
11265 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::v2f64, XR2F, CLod1);
11268 if (Subtarget->hasSSE3()) {
11269 // FIXME: The 'haddpd' instruction may be slower than 'movhlps + addsd'.
11270 Result = DAG.getNode(X86ISD::FHADD, dl, MVT::v2f64, Sub, Sub);
11272 SDValue S2F = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Sub);
11273 SDValue Shuffle = getTargetShuffleNode(X86ISD::PSHUFD, dl, MVT::v4i32,
11275 Result = DAG.getNode(ISD::FADD, dl, MVT::v2f64,
11276 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Shuffle),
11280 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Result,
11281 DAG.getIntPtrConstant(0));
11284 // LowerUINT_TO_FP_i32 - 32-bit unsigned integer to float expansion.
11285 SDValue X86TargetLowering::LowerUINT_TO_FP_i32(SDValue Op,
11286 SelectionDAG &DAG) const {
11288 // FP constant to bias correct the final result.
11289 SDValue Bias = DAG.getConstantFP(BitsToDouble(0x4330000000000000ULL),
11292 // Load the 32-bit value into an XMM register.
11293 SDValue Load = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,
11296 // Zero out the upper parts of the register.
11297 Load = getShuffleVectorZeroOrUndef(Load, 0, true, Subtarget, DAG);
11299 Load = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
11300 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Load),
11301 DAG.getIntPtrConstant(0));
11303 // Or the load with the bias.
11304 SDValue Or = DAG.getNode(ISD::OR, dl, MVT::v2i64,
11305 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
11306 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
11307 MVT::v2f64, Load)),
11308 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
11309 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
11310 MVT::v2f64, Bias)));
11311 Or = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
11312 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Or),
11313 DAG.getIntPtrConstant(0));
11315 // Subtract the bias.
11316 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::f64, Or, Bias);
11318 // Handle final rounding.
11319 EVT DestVT = Op.getValueType();
11321 if (DestVT.bitsLT(MVT::f64))
11322 return DAG.getNode(ISD::FP_ROUND, dl, DestVT, Sub,
11323 DAG.getIntPtrConstant(0));
11324 if (DestVT.bitsGT(MVT::f64))
11325 return DAG.getNode(ISD::FP_EXTEND, dl, DestVT, Sub);
11327 // Handle final rounding.
11331 SDValue X86TargetLowering::lowerUINT_TO_FP_vec(SDValue Op,
11332 SelectionDAG &DAG) const {
11333 SDValue N0 = Op.getOperand(0);
11334 MVT SVT = N0.getSimpleValueType();
11337 assert((SVT == MVT::v4i8 || SVT == MVT::v4i16 ||
11338 SVT == MVT::v8i8 || SVT == MVT::v8i16) &&
11339 "Custom UINT_TO_FP is not supported!");
11341 MVT NVT = MVT::getVectorVT(MVT::i32, SVT.getVectorNumElements());
11342 return DAG.getNode(ISD::SINT_TO_FP, dl, Op.getValueType(),
11343 DAG.getNode(ISD::ZERO_EXTEND, dl, NVT, N0));
11346 SDValue X86TargetLowering::LowerUINT_TO_FP(SDValue Op,
11347 SelectionDAG &DAG) const {
11348 SDValue N0 = Op.getOperand(0);
11351 if (Op.getValueType().isVector())
11352 return lowerUINT_TO_FP_vec(Op, DAG);
11354 // Since UINT_TO_FP is legal (it's marked custom), dag combiner won't
11355 // optimize it to a SINT_TO_FP when the sign bit is known zero. Perform
11356 // the optimization here.
11357 if (DAG.SignBitIsZero(N0))
11358 return DAG.getNode(ISD::SINT_TO_FP, dl, Op.getValueType(), N0);
11360 MVT SrcVT = N0.getSimpleValueType();
11361 MVT DstVT = Op.getSimpleValueType();
11362 if (SrcVT == MVT::i64 && DstVT == MVT::f64 && X86ScalarSSEf64)
11363 return LowerUINT_TO_FP_i64(Op, DAG);
11364 if (SrcVT == MVT::i32 && X86ScalarSSEf64)
11365 return LowerUINT_TO_FP_i32(Op, DAG);
11366 if (Subtarget->is64Bit() && SrcVT == MVT::i64 && DstVT == MVT::f32)
11369 // Make a 64-bit buffer, and use it to build an FILD.
11370 SDValue StackSlot = DAG.CreateStackTemporary(MVT::i64);
11371 if (SrcVT == MVT::i32) {
11372 SDValue WordOff = DAG.getConstant(4, getPointerTy());
11373 SDValue OffsetSlot = DAG.getNode(ISD::ADD, dl,
11374 getPointerTy(), StackSlot, WordOff);
11375 SDValue Store1 = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
11376 StackSlot, MachinePointerInfo(),
11378 SDValue Store2 = DAG.getStore(Store1, dl, DAG.getConstant(0, MVT::i32),
11379 OffsetSlot, MachinePointerInfo(),
11381 SDValue Fild = BuildFILD(Op, MVT::i64, Store2, StackSlot, DAG);
11385 assert(SrcVT == MVT::i64 && "Unexpected type in UINT_TO_FP");
11386 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
11387 StackSlot, MachinePointerInfo(),
11389 // For i64 source, we need to add the appropriate power of 2 if the input
11390 // was negative. This is the same as the optimization in
11391 // DAGTypeLegalizer::ExpandIntOp_UNIT_TO_FP, and for it to be safe here,
11392 // we must be careful to do the computation in x87 extended precision, not
11393 // in SSE. (The generic code can't know it's OK to do this, or how to.)
11394 int SSFI = cast<FrameIndexSDNode>(StackSlot)->getIndex();
11395 MachineMemOperand *MMO =
11396 DAG.getMachineFunction()
11397 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
11398 MachineMemOperand::MOLoad, 8, 8);
11400 SDVTList Tys = DAG.getVTList(MVT::f80, MVT::Other);
11401 SDValue Ops[] = { Store, StackSlot, DAG.getValueType(MVT::i64) };
11402 SDValue Fild = DAG.getMemIntrinsicNode(X86ISD::FILD, dl, Tys, Ops,
11405 APInt FF(32, 0x5F800000ULL);
11407 // Check whether the sign bit is set.
11408 SDValue SignSet = DAG.getSetCC(dl,
11409 getSetCCResultType(*DAG.getContext(), MVT::i64),
11410 Op.getOperand(0), DAG.getConstant(0, MVT::i64),
11413 // Build a 64 bit pair (0, FF) in the constant pool, with FF in the lo bits.
11414 SDValue FudgePtr = DAG.getConstantPool(
11415 ConstantInt::get(*DAG.getContext(), FF.zext(64)),
11418 // Get a pointer to FF if the sign bit was set, or to 0 otherwise.
11419 SDValue Zero = DAG.getIntPtrConstant(0);
11420 SDValue Four = DAG.getIntPtrConstant(4);
11421 SDValue Offset = DAG.getNode(ISD::SELECT, dl, Zero.getValueType(), SignSet,
11423 FudgePtr = DAG.getNode(ISD::ADD, dl, getPointerTy(), FudgePtr, Offset);
11425 // Load the value out, extending it from f32 to f80.
11426 // FIXME: Avoid the extend by constructing the right constant pool?
11427 SDValue Fudge = DAG.getExtLoad(ISD::EXTLOAD, dl, MVT::f80, DAG.getEntryNode(),
11428 FudgePtr, MachinePointerInfo::getConstantPool(),
11429 MVT::f32, false, false, false, 4);
11430 // Extend everything to 80 bits to force it to be done on x87.
11431 SDValue Add = DAG.getNode(ISD::FADD, dl, MVT::f80, Fild, Fudge);
11432 return DAG.getNode(ISD::FP_ROUND, dl, DstVT, Add, DAG.getIntPtrConstant(0));
11435 std::pair<SDValue,SDValue>
11436 X86TargetLowering:: FP_TO_INTHelper(SDValue Op, SelectionDAG &DAG,
11437 bool IsSigned, bool IsReplace) const {
11440 EVT DstTy = Op.getValueType();
11442 if (!IsSigned && !isIntegerTypeFTOL(DstTy)) {
11443 assert(DstTy == MVT::i32 && "Unexpected FP_TO_UINT");
11447 assert(DstTy.getSimpleVT() <= MVT::i64 &&
11448 DstTy.getSimpleVT() >= MVT::i16 &&
11449 "Unknown FP_TO_INT to lower!");
11451 // These are really Legal.
11452 if (DstTy == MVT::i32 &&
11453 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
11454 return std::make_pair(SDValue(), SDValue());
11455 if (Subtarget->is64Bit() &&
11456 DstTy == MVT::i64 &&
11457 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
11458 return std::make_pair(SDValue(), SDValue());
11460 // We lower FP->int64 either into FISTP64 followed by a load from a temporary
11461 // stack slot, or into the FTOL runtime function.
11462 MachineFunction &MF = DAG.getMachineFunction();
11463 unsigned MemSize = DstTy.getSizeInBits()/8;
11464 int SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize, false);
11465 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
11468 if (!IsSigned && isIntegerTypeFTOL(DstTy))
11469 Opc = X86ISD::WIN_FTOL;
11471 switch (DstTy.getSimpleVT().SimpleTy) {
11472 default: llvm_unreachable("Invalid FP_TO_SINT to lower!");
11473 case MVT::i16: Opc = X86ISD::FP_TO_INT16_IN_MEM; break;
11474 case MVT::i32: Opc = X86ISD::FP_TO_INT32_IN_MEM; break;
11475 case MVT::i64: Opc = X86ISD::FP_TO_INT64_IN_MEM; break;
11478 SDValue Chain = DAG.getEntryNode();
11479 SDValue Value = Op.getOperand(0);
11480 EVT TheVT = Op.getOperand(0).getValueType();
11481 // FIXME This causes a redundant load/store if the SSE-class value is already
11482 // in memory, such as if it is on the callstack.
11483 if (isScalarFPTypeInSSEReg(TheVT)) {
11484 assert(DstTy == MVT::i64 && "Invalid FP_TO_SINT to lower!");
11485 Chain = DAG.getStore(Chain, DL, Value, StackSlot,
11486 MachinePointerInfo::getFixedStack(SSFI),
11488 SDVTList Tys = DAG.getVTList(Op.getOperand(0).getValueType(), MVT::Other);
11490 Chain, StackSlot, DAG.getValueType(TheVT)
11493 MachineMemOperand *MMO =
11494 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
11495 MachineMemOperand::MOLoad, MemSize, MemSize);
11496 Value = DAG.getMemIntrinsicNode(X86ISD::FLD, DL, Tys, Ops, DstTy, MMO);
11497 Chain = Value.getValue(1);
11498 SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize, false);
11499 StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
11502 MachineMemOperand *MMO =
11503 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
11504 MachineMemOperand::MOStore, MemSize, MemSize);
11506 if (Opc != X86ISD::WIN_FTOL) {
11507 // Build the FP_TO_INT*_IN_MEM
11508 SDValue Ops[] = { Chain, Value, StackSlot };
11509 SDValue FIST = DAG.getMemIntrinsicNode(Opc, DL, DAG.getVTList(MVT::Other),
11511 return std::make_pair(FIST, StackSlot);
11513 SDValue ftol = DAG.getNode(X86ISD::WIN_FTOL, DL,
11514 DAG.getVTList(MVT::Other, MVT::Glue),
11516 SDValue eax = DAG.getCopyFromReg(ftol, DL, X86::EAX,
11517 MVT::i32, ftol.getValue(1));
11518 SDValue edx = DAG.getCopyFromReg(eax.getValue(1), DL, X86::EDX,
11519 MVT::i32, eax.getValue(2));
11520 SDValue Ops[] = { eax, edx };
11521 SDValue pair = IsReplace
11522 ? DAG.getNode(ISD::BUILD_PAIR, DL, MVT::i64, Ops)
11523 : DAG.getMergeValues(Ops, DL);
11524 return std::make_pair(pair, SDValue());
11528 static SDValue LowerAVXExtend(SDValue Op, SelectionDAG &DAG,
11529 const X86Subtarget *Subtarget) {
11530 MVT VT = Op->getSimpleValueType(0);
11531 SDValue In = Op->getOperand(0);
11532 MVT InVT = In.getSimpleValueType();
11535 // Optimize vectors in AVX mode:
11538 // Use vpunpcklwd for 4 lower elements v8i16 -> v4i32.
11539 // Use vpunpckhwd for 4 upper elements v8i16 -> v4i32.
11540 // Concat upper and lower parts.
11543 // Use vpunpckldq for 4 lower elements v4i32 -> v2i64.
11544 // Use vpunpckhdq for 4 upper elements v4i32 -> v2i64.
11545 // Concat upper and lower parts.
11548 if (((VT != MVT::v16i16) || (InVT != MVT::v16i8)) &&
11549 ((VT != MVT::v8i32) || (InVT != MVT::v8i16)) &&
11550 ((VT != MVT::v4i64) || (InVT != MVT::v4i32)))
11553 if (Subtarget->hasInt256())
11554 return DAG.getNode(X86ISD::VZEXT, dl, VT, In);
11556 SDValue ZeroVec = getZeroVector(InVT, Subtarget, DAG, dl);
11557 SDValue Undef = DAG.getUNDEF(InVT);
11558 bool NeedZero = Op.getOpcode() == ISD::ZERO_EXTEND;
11559 SDValue OpLo = getUnpackl(DAG, dl, InVT, In, NeedZero ? ZeroVec : Undef);
11560 SDValue OpHi = getUnpackh(DAG, dl, InVT, In, NeedZero ? ZeroVec : Undef);
11562 MVT HVT = MVT::getVectorVT(VT.getVectorElementType(),
11563 VT.getVectorNumElements()/2);
11565 OpLo = DAG.getNode(ISD::BITCAST, dl, HVT, OpLo);
11566 OpHi = DAG.getNode(ISD::BITCAST, dl, HVT, OpHi);
11568 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, OpLo, OpHi);
11571 static SDValue LowerZERO_EXTEND_AVX512(SDValue Op,
11572 SelectionDAG &DAG) {
11573 MVT VT = Op->getSimpleValueType(0);
11574 SDValue In = Op->getOperand(0);
11575 MVT InVT = In.getSimpleValueType();
11577 unsigned int NumElts = VT.getVectorNumElements();
11578 if (NumElts != 8 && NumElts != 16)
11581 if (VT.is512BitVector() && InVT.getVectorElementType() != MVT::i1)
11582 return DAG.getNode(X86ISD::VZEXT, DL, VT, In);
11584 EVT ExtVT = (NumElts == 8)? MVT::v8i64 : MVT::v16i32;
11585 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
11586 // Now we have only mask extension
11587 assert(InVT.getVectorElementType() == MVT::i1);
11588 SDValue Cst = DAG.getTargetConstant(1, ExtVT.getScalarType());
11589 const Constant *C = (dyn_cast<ConstantSDNode>(Cst))->getConstantIntValue();
11590 SDValue CP = DAG.getConstantPool(C, TLI.getPointerTy());
11591 unsigned Alignment = cast<ConstantPoolSDNode>(CP)->getAlignment();
11592 SDValue Ld = DAG.getLoad(Cst.getValueType(), DL, DAG.getEntryNode(), CP,
11593 MachinePointerInfo::getConstantPool(),
11594 false, false, false, Alignment);
11596 SDValue Brcst = DAG.getNode(X86ISD::VBROADCASTM, DL, ExtVT, In, Ld);
11597 if (VT.is512BitVector())
11599 return DAG.getNode(X86ISD::VTRUNC, DL, VT, Brcst);
11602 static SDValue LowerANY_EXTEND(SDValue Op, const X86Subtarget *Subtarget,
11603 SelectionDAG &DAG) {
11604 if (Subtarget->hasFp256()) {
11605 SDValue Res = LowerAVXExtend(Op, DAG, Subtarget);
11613 static SDValue LowerZERO_EXTEND(SDValue Op, const X86Subtarget *Subtarget,
11614 SelectionDAG &DAG) {
11616 MVT VT = Op.getSimpleValueType();
11617 SDValue In = Op.getOperand(0);
11618 MVT SVT = In.getSimpleValueType();
11620 if (VT.is512BitVector() || SVT.getVectorElementType() == MVT::i1)
11621 return LowerZERO_EXTEND_AVX512(Op, DAG);
11623 if (Subtarget->hasFp256()) {
11624 SDValue Res = LowerAVXExtend(Op, DAG, Subtarget);
11629 assert(!VT.is256BitVector() || !SVT.is128BitVector() ||
11630 VT.getVectorNumElements() != SVT.getVectorNumElements());
11634 SDValue X86TargetLowering::LowerTRUNCATE(SDValue Op, SelectionDAG &DAG) const {
11636 MVT VT = Op.getSimpleValueType();
11637 SDValue In = Op.getOperand(0);
11638 MVT InVT = In.getSimpleValueType();
11640 if (VT == MVT::i1) {
11641 assert((InVT.isInteger() && (InVT.getSizeInBits() <= 64)) &&
11642 "Invalid scalar TRUNCATE operation");
11643 if (InVT == MVT::i32)
11645 if (InVT.getSizeInBits() == 64)
11646 In = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::i32, In);
11647 else if (InVT.getSizeInBits() < 32)
11648 In = DAG.getNode(ISD::ANY_EXTEND, DL, MVT::i32, In);
11649 return DAG.getNode(ISD::TRUNCATE, DL, VT, In);
11651 assert(VT.getVectorNumElements() == InVT.getVectorNumElements() &&
11652 "Invalid TRUNCATE operation");
11654 if (InVT.is512BitVector() || VT.getVectorElementType() == MVT::i1) {
11655 if (VT.getVectorElementType().getSizeInBits() >=8)
11656 return DAG.getNode(X86ISD::VTRUNC, DL, VT, In);
11658 assert(VT.getVectorElementType() == MVT::i1 && "Unexpected vector type");
11659 unsigned NumElts = InVT.getVectorNumElements();
11660 assert ((NumElts == 8 || NumElts == 16) && "Unexpected vector type");
11661 if (InVT.getSizeInBits() < 512) {
11662 MVT ExtVT = (NumElts == 16)? MVT::v16i32 : MVT::v8i64;
11663 In = DAG.getNode(ISD::SIGN_EXTEND, DL, ExtVT, In);
11667 SDValue Cst = DAG.getTargetConstant(1, InVT.getVectorElementType());
11668 const Constant *C = (dyn_cast<ConstantSDNode>(Cst))->getConstantIntValue();
11669 SDValue CP = DAG.getConstantPool(C, getPointerTy());
11670 unsigned Alignment = cast<ConstantPoolSDNode>(CP)->getAlignment();
11671 SDValue Ld = DAG.getLoad(Cst.getValueType(), DL, DAG.getEntryNode(), CP,
11672 MachinePointerInfo::getConstantPool(),
11673 false, false, false, Alignment);
11674 SDValue OneV = DAG.getNode(X86ISD::VBROADCAST, DL, InVT, Ld);
11675 SDValue And = DAG.getNode(ISD::AND, DL, InVT, OneV, In);
11676 return DAG.getNode(X86ISD::TESTM, DL, VT, And, And);
11679 if ((VT == MVT::v4i32) && (InVT == MVT::v4i64)) {
11680 // On AVX2, v4i64 -> v4i32 becomes VPERMD.
11681 if (Subtarget->hasInt256()) {
11682 static const int ShufMask[] = {0, 2, 4, 6, -1, -1, -1, -1};
11683 In = DAG.getNode(ISD::BITCAST, DL, MVT::v8i32, In);
11684 In = DAG.getVectorShuffle(MVT::v8i32, DL, In, DAG.getUNDEF(MVT::v8i32),
11686 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, In,
11687 DAG.getIntPtrConstant(0));
11690 SDValue OpLo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v2i64, In,
11691 DAG.getIntPtrConstant(0));
11692 SDValue OpHi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v2i64, In,
11693 DAG.getIntPtrConstant(2));
11694 OpLo = DAG.getNode(ISD::BITCAST, DL, MVT::v4i32, OpLo);
11695 OpHi = DAG.getNode(ISD::BITCAST, DL, MVT::v4i32, OpHi);
11696 static const int ShufMask[] = {0, 2, 4, 6};
11697 return DAG.getVectorShuffle(VT, DL, OpLo, OpHi, ShufMask);
11700 if ((VT == MVT::v8i16) && (InVT == MVT::v8i32)) {
11701 // On AVX2, v8i32 -> v8i16 becomed PSHUFB.
11702 if (Subtarget->hasInt256()) {
11703 In = DAG.getNode(ISD::BITCAST, DL, MVT::v32i8, In);
11705 SmallVector<SDValue,32> pshufbMask;
11706 for (unsigned i = 0; i < 2; ++i) {
11707 pshufbMask.push_back(DAG.getConstant(0x0, MVT::i8));
11708 pshufbMask.push_back(DAG.getConstant(0x1, MVT::i8));
11709 pshufbMask.push_back(DAG.getConstant(0x4, MVT::i8));
11710 pshufbMask.push_back(DAG.getConstant(0x5, MVT::i8));
11711 pshufbMask.push_back(DAG.getConstant(0x8, MVT::i8));
11712 pshufbMask.push_back(DAG.getConstant(0x9, MVT::i8));
11713 pshufbMask.push_back(DAG.getConstant(0xc, MVT::i8));
11714 pshufbMask.push_back(DAG.getConstant(0xd, MVT::i8));
11715 for (unsigned j = 0; j < 8; ++j)
11716 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
11718 SDValue BV = DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v32i8, pshufbMask);
11719 In = DAG.getNode(X86ISD::PSHUFB, DL, MVT::v32i8, In, BV);
11720 In = DAG.getNode(ISD::BITCAST, DL, MVT::v4i64, In);
11722 static const int ShufMask[] = {0, 2, -1, -1};
11723 In = DAG.getVectorShuffle(MVT::v4i64, DL, In, DAG.getUNDEF(MVT::v4i64),
11725 In = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v2i64, In,
11726 DAG.getIntPtrConstant(0));
11727 return DAG.getNode(ISD::BITCAST, DL, VT, In);
11730 SDValue OpLo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v4i32, In,
11731 DAG.getIntPtrConstant(0));
11733 SDValue OpHi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v4i32, In,
11734 DAG.getIntPtrConstant(4));
11736 OpLo = DAG.getNode(ISD::BITCAST, DL, MVT::v16i8, OpLo);
11737 OpHi = DAG.getNode(ISD::BITCAST, DL, MVT::v16i8, OpHi);
11739 // The PSHUFB mask:
11740 static const int ShufMask1[] = {0, 1, 4, 5, 8, 9, 12, 13,
11741 -1, -1, -1, -1, -1, -1, -1, -1};
11743 SDValue Undef = DAG.getUNDEF(MVT::v16i8);
11744 OpLo = DAG.getVectorShuffle(MVT::v16i8, DL, OpLo, Undef, ShufMask1);
11745 OpHi = DAG.getVectorShuffle(MVT::v16i8, DL, OpHi, Undef, ShufMask1);
11747 OpLo = DAG.getNode(ISD::BITCAST, DL, MVT::v4i32, OpLo);
11748 OpHi = DAG.getNode(ISD::BITCAST, DL, MVT::v4i32, OpHi);
11750 // The MOVLHPS Mask:
11751 static const int ShufMask2[] = {0, 1, 4, 5};
11752 SDValue res = DAG.getVectorShuffle(MVT::v4i32, DL, OpLo, OpHi, ShufMask2);
11753 return DAG.getNode(ISD::BITCAST, DL, MVT::v8i16, res);
11756 // Handle truncation of V256 to V128 using shuffles.
11757 if (!VT.is128BitVector() || !InVT.is256BitVector())
11760 assert(Subtarget->hasFp256() && "256-bit vector without AVX!");
11762 unsigned NumElems = VT.getVectorNumElements();
11763 MVT NVT = MVT::getVectorVT(VT.getVectorElementType(), NumElems * 2);
11765 SmallVector<int, 16> MaskVec(NumElems * 2, -1);
11766 // Prepare truncation shuffle mask
11767 for (unsigned i = 0; i != NumElems; ++i)
11768 MaskVec[i] = i * 2;
11769 SDValue V = DAG.getVectorShuffle(NVT, DL,
11770 DAG.getNode(ISD::BITCAST, DL, NVT, In),
11771 DAG.getUNDEF(NVT), &MaskVec[0]);
11772 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, V,
11773 DAG.getIntPtrConstant(0));
11776 SDValue X86TargetLowering::LowerFP_TO_SINT(SDValue Op,
11777 SelectionDAG &DAG) const {
11778 assert(!Op.getSimpleValueType().isVector());
11780 std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG,
11781 /*IsSigned=*/ true, /*IsReplace=*/ false);
11782 SDValue FIST = Vals.first, StackSlot = Vals.second;
11783 // If FP_TO_INTHelper failed, the node is actually supposed to be Legal.
11784 if (!FIST.getNode()) return Op;
11786 if (StackSlot.getNode())
11787 // Load the result.
11788 return DAG.getLoad(Op.getValueType(), SDLoc(Op),
11789 FIST, StackSlot, MachinePointerInfo(),
11790 false, false, false, 0);
11792 // The node is the result.
11796 SDValue X86TargetLowering::LowerFP_TO_UINT(SDValue Op,
11797 SelectionDAG &DAG) const {
11798 std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG,
11799 /*IsSigned=*/ false, /*IsReplace=*/ false);
11800 SDValue FIST = Vals.first, StackSlot = Vals.second;
11801 assert(FIST.getNode() && "Unexpected failure");
11803 if (StackSlot.getNode())
11804 // Load the result.
11805 return DAG.getLoad(Op.getValueType(), SDLoc(Op),
11806 FIST, StackSlot, MachinePointerInfo(),
11807 false, false, false, 0);
11809 // The node is the result.
11813 static SDValue LowerFP_EXTEND(SDValue Op, SelectionDAG &DAG) {
11815 MVT VT = Op.getSimpleValueType();
11816 SDValue In = Op.getOperand(0);
11817 MVT SVT = In.getSimpleValueType();
11819 assert(SVT == MVT::v2f32 && "Only customize MVT::v2f32 type legalization!");
11821 return DAG.getNode(X86ISD::VFPEXT, DL, VT,
11822 DAG.getNode(ISD::CONCAT_VECTORS, DL, MVT::v4f32,
11823 In, DAG.getUNDEF(SVT)));
11826 static SDValue LowerFABS(SDValue Op, SelectionDAG &DAG) {
11827 LLVMContext *Context = DAG.getContext();
11829 MVT VT = Op.getSimpleValueType();
11831 unsigned NumElts = VT == MVT::f64 ? 2 : 4;
11832 if (VT.isVector()) {
11833 EltVT = VT.getVectorElementType();
11834 NumElts = VT.getVectorNumElements();
11837 if (EltVT == MVT::f64)
11838 C = ConstantFP::get(*Context, APFloat(APFloat::IEEEdouble,
11839 APInt(64, ~(1ULL << 63))));
11841 C = ConstantFP::get(*Context, APFloat(APFloat::IEEEsingle,
11842 APInt(32, ~(1U << 31))));
11843 C = ConstantVector::getSplat(NumElts, C);
11844 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
11845 SDValue CPIdx = DAG.getConstantPool(C, TLI.getPointerTy());
11846 unsigned Alignment = cast<ConstantPoolSDNode>(CPIdx)->getAlignment();
11847 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
11848 MachinePointerInfo::getConstantPool(),
11849 false, false, false, Alignment);
11850 if (VT.isVector()) {
11851 MVT ANDVT = VT.is128BitVector() ? MVT::v2i64 : MVT::v4i64;
11852 return DAG.getNode(ISD::BITCAST, dl, VT,
11853 DAG.getNode(ISD::AND, dl, ANDVT,
11854 DAG.getNode(ISD::BITCAST, dl, ANDVT,
11856 DAG.getNode(ISD::BITCAST, dl, ANDVT, Mask)));
11858 return DAG.getNode(X86ISD::FAND, dl, VT, Op.getOperand(0), Mask);
11861 static SDValue LowerFNEG(SDValue Op, SelectionDAG &DAG) {
11862 LLVMContext *Context = DAG.getContext();
11864 MVT VT = Op.getSimpleValueType();
11866 unsigned NumElts = VT == MVT::f64 ? 2 : 4;
11867 if (VT.isVector()) {
11868 EltVT = VT.getVectorElementType();
11869 NumElts = VT.getVectorNumElements();
11872 if (EltVT == MVT::f64)
11873 C = ConstantFP::get(*Context, APFloat(APFloat::IEEEdouble,
11874 APInt(64, 1ULL << 63)));
11876 C = ConstantFP::get(*Context, APFloat(APFloat::IEEEsingle,
11877 APInt(32, 1U << 31)));
11878 C = ConstantVector::getSplat(NumElts, C);
11879 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
11880 SDValue CPIdx = DAG.getConstantPool(C, TLI.getPointerTy());
11881 unsigned Alignment = cast<ConstantPoolSDNode>(CPIdx)->getAlignment();
11882 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
11883 MachinePointerInfo::getConstantPool(),
11884 false, false, false, Alignment);
11885 if (VT.isVector()) {
11886 MVT XORVT = MVT::getVectorVT(MVT::i64, VT.getSizeInBits()/64);
11887 return DAG.getNode(ISD::BITCAST, dl, VT,
11888 DAG.getNode(ISD::XOR, dl, XORVT,
11889 DAG.getNode(ISD::BITCAST, dl, XORVT,
11891 DAG.getNode(ISD::BITCAST, dl, XORVT, Mask)));
11894 return DAG.getNode(X86ISD::FXOR, dl, VT, Op.getOperand(0), Mask);
11897 static SDValue LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) {
11898 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
11899 LLVMContext *Context = DAG.getContext();
11900 SDValue Op0 = Op.getOperand(0);
11901 SDValue Op1 = Op.getOperand(1);
11903 MVT VT = Op.getSimpleValueType();
11904 MVT SrcVT = Op1.getSimpleValueType();
11906 // If second operand is smaller, extend it first.
11907 if (SrcVT.bitsLT(VT)) {
11908 Op1 = DAG.getNode(ISD::FP_EXTEND, dl, VT, Op1);
11911 // And if it is bigger, shrink it first.
11912 if (SrcVT.bitsGT(VT)) {
11913 Op1 = DAG.getNode(ISD::FP_ROUND, dl, VT, Op1, DAG.getIntPtrConstant(1));
11917 // At this point the operands and the result should have the same
11918 // type, and that won't be f80 since that is not custom lowered.
11920 // First get the sign bit of second operand.
11921 SmallVector<Constant*,4> CV;
11922 if (SrcVT == MVT::f64) {
11923 const fltSemantics &Sem = APFloat::IEEEdouble;
11924 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(64, 1ULL << 63))));
11925 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(64, 0))));
11927 const fltSemantics &Sem = APFloat::IEEEsingle;
11928 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 1U << 31))));
11929 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 0))));
11930 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 0))));
11931 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 0))));
11933 Constant *C = ConstantVector::get(CV);
11934 SDValue CPIdx = DAG.getConstantPool(C, TLI.getPointerTy(), 16);
11935 SDValue Mask1 = DAG.getLoad(SrcVT, dl, DAG.getEntryNode(), CPIdx,
11936 MachinePointerInfo::getConstantPool(),
11937 false, false, false, 16);
11938 SDValue SignBit = DAG.getNode(X86ISD::FAND, dl, SrcVT, Op1, Mask1);
11940 // Shift sign bit right or left if the two operands have different types.
11941 if (SrcVT.bitsGT(VT)) {
11942 // Op0 is MVT::f32, Op1 is MVT::f64.
11943 SignBit = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f64, SignBit);
11944 SignBit = DAG.getNode(X86ISD::FSRL, dl, MVT::v2f64, SignBit,
11945 DAG.getConstant(32, MVT::i32));
11946 SignBit = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, SignBit);
11947 SignBit = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, SignBit,
11948 DAG.getIntPtrConstant(0));
11951 // Clear first operand sign bit.
11953 if (VT == MVT::f64) {
11954 const fltSemantics &Sem = APFloat::IEEEdouble;
11955 CV.push_back(ConstantFP::get(*Context, APFloat(Sem,
11956 APInt(64, ~(1ULL << 63)))));
11957 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(64, 0))));
11959 const fltSemantics &Sem = APFloat::IEEEsingle;
11960 CV.push_back(ConstantFP::get(*Context, APFloat(Sem,
11961 APInt(32, ~(1U << 31)))));
11962 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 0))));
11963 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 0))));
11964 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 0))));
11966 C = ConstantVector::get(CV);
11967 CPIdx = DAG.getConstantPool(C, TLI.getPointerTy(), 16);
11968 SDValue Mask2 = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
11969 MachinePointerInfo::getConstantPool(),
11970 false, false, false, 16);
11971 SDValue Val = DAG.getNode(X86ISD::FAND, dl, VT, Op0, Mask2);
11973 // Or the value with the sign bit.
11974 return DAG.getNode(X86ISD::FOR, dl, VT, Val, SignBit);
11977 static SDValue LowerFGETSIGN(SDValue Op, SelectionDAG &DAG) {
11978 SDValue N0 = Op.getOperand(0);
11980 MVT VT = Op.getSimpleValueType();
11982 // Lower ISD::FGETSIGN to (AND (X86ISD::FGETSIGNx86 ...) 1).
11983 SDValue xFGETSIGN = DAG.getNode(X86ISD::FGETSIGNx86, dl, VT, N0,
11984 DAG.getConstant(1, VT));
11985 return DAG.getNode(ISD::AND, dl, VT, xFGETSIGN, DAG.getConstant(1, VT));
11988 // LowerVectorAllZeroTest - Check whether an OR'd tree is PTEST-able.
11990 static SDValue LowerVectorAllZeroTest(SDValue Op, const X86Subtarget *Subtarget,
11991 SelectionDAG &DAG) {
11992 assert(Op.getOpcode() == ISD::OR && "Only check OR'd tree.");
11994 if (!Subtarget->hasSSE41())
11997 if (!Op->hasOneUse())
12000 SDNode *N = Op.getNode();
12003 SmallVector<SDValue, 8> Opnds;
12004 DenseMap<SDValue, unsigned> VecInMap;
12005 SmallVector<SDValue, 8> VecIns;
12006 EVT VT = MVT::Other;
12008 // Recognize a special case where a vector is casted into wide integer to
12010 Opnds.push_back(N->getOperand(0));
12011 Opnds.push_back(N->getOperand(1));
12013 for (unsigned Slot = 0, e = Opnds.size(); Slot < e; ++Slot) {
12014 SmallVectorImpl<SDValue>::const_iterator I = Opnds.begin() + Slot;
12015 // BFS traverse all OR'd operands.
12016 if (I->getOpcode() == ISD::OR) {
12017 Opnds.push_back(I->getOperand(0));
12018 Opnds.push_back(I->getOperand(1));
12019 // Re-evaluate the number of nodes to be traversed.
12020 e += 2; // 2 more nodes (LHS and RHS) are pushed.
12024 // Quit if a non-EXTRACT_VECTOR_ELT
12025 if (I->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
12028 // Quit if without a constant index.
12029 SDValue Idx = I->getOperand(1);
12030 if (!isa<ConstantSDNode>(Idx))
12033 SDValue ExtractedFromVec = I->getOperand(0);
12034 DenseMap<SDValue, unsigned>::iterator M = VecInMap.find(ExtractedFromVec);
12035 if (M == VecInMap.end()) {
12036 VT = ExtractedFromVec.getValueType();
12037 // Quit if not 128/256-bit vector.
12038 if (!VT.is128BitVector() && !VT.is256BitVector())
12040 // Quit if not the same type.
12041 if (VecInMap.begin() != VecInMap.end() &&
12042 VT != VecInMap.begin()->first.getValueType())
12044 M = VecInMap.insert(std::make_pair(ExtractedFromVec, 0)).first;
12045 VecIns.push_back(ExtractedFromVec);
12047 M->second |= 1U << cast<ConstantSDNode>(Idx)->getZExtValue();
12050 assert((VT.is128BitVector() || VT.is256BitVector()) &&
12051 "Not extracted from 128-/256-bit vector.");
12053 unsigned FullMask = (1U << VT.getVectorNumElements()) - 1U;
12055 for (DenseMap<SDValue, unsigned>::const_iterator
12056 I = VecInMap.begin(), E = VecInMap.end(); I != E; ++I) {
12057 // Quit if not all elements are used.
12058 if (I->second != FullMask)
12062 EVT TestVT = VT.is128BitVector() ? MVT::v2i64 : MVT::v4i64;
12064 // Cast all vectors into TestVT for PTEST.
12065 for (unsigned i = 0, e = VecIns.size(); i < e; ++i)
12066 VecIns[i] = DAG.getNode(ISD::BITCAST, DL, TestVT, VecIns[i]);
12068 // If more than one full vectors are evaluated, OR them first before PTEST.
12069 for (unsigned Slot = 0, e = VecIns.size(); e - Slot > 1; Slot += 2, e += 1) {
12070 // Each iteration will OR 2 nodes and append the result until there is only
12071 // 1 node left, i.e. the final OR'd value of all vectors.
12072 SDValue LHS = VecIns[Slot];
12073 SDValue RHS = VecIns[Slot + 1];
12074 VecIns.push_back(DAG.getNode(ISD::OR, DL, TestVT, LHS, RHS));
12077 return DAG.getNode(X86ISD::PTEST, DL, MVT::i32,
12078 VecIns.back(), VecIns.back());
12081 /// \brief return true if \c Op has a use that doesn't just read flags.
12082 static bool hasNonFlagsUse(SDValue Op) {
12083 for (SDNode::use_iterator UI = Op->use_begin(), UE = Op->use_end(); UI != UE;
12085 SDNode *User = *UI;
12086 unsigned UOpNo = UI.getOperandNo();
12087 if (User->getOpcode() == ISD::TRUNCATE && User->hasOneUse()) {
12088 // Look pass truncate.
12089 UOpNo = User->use_begin().getOperandNo();
12090 User = *User->use_begin();
12093 if (User->getOpcode() != ISD::BRCOND && User->getOpcode() != ISD::SETCC &&
12094 !(User->getOpcode() == ISD::SELECT && UOpNo == 0))
12100 /// Emit nodes that will be selected as "test Op0,Op0", or something
12102 SDValue X86TargetLowering::EmitTest(SDValue Op, unsigned X86CC, SDLoc dl,
12103 SelectionDAG &DAG) const {
12104 if (Op.getValueType() == MVT::i1)
12105 // KORTEST instruction should be selected
12106 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
12107 DAG.getConstant(0, Op.getValueType()));
12109 // CF and OF aren't always set the way we want. Determine which
12110 // of these we need.
12111 bool NeedCF = false;
12112 bool NeedOF = false;
12115 case X86::COND_A: case X86::COND_AE:
12116 case X86::COND_B: case X86::COND_BE:
12119 case X86::COND_G: case X86::COND_GE:
12120 case X86::COND_L: case X86::COND_LE:
12121 case X86::COND_O: case X86::COND_NO: {
12122 // Check if we really need to set the
12123 // Overflow flag. If NoSignedWrap is present
12124 // that is not actually needed.
12125 switch (Op->getOpcode()) {
12130 const BinaryWithFlagsSDNode *BinNode =
12131 cast<BinaryWithFlagsSDNode>(Op.getNode());
12132 if (BinNode->hasNoSignedWrap())
12142 // See if we can use the EFLAGS value from the operand instead of
12143 // doing a separate TEST. TEST always sets OF and CF to 0, so unless
12144 // we prove that the arithmetic won't overflow, we can't use OF or CF.
12145 if (Op.getResNo() != 0 || NeedOF || NeedCF) {
12146 // Emit a CMP with 0, which is the TEST pattern.
12147 //if (Op.getValueType() == MVT::i1)
12148 // return DAG.getNode(X86ISD::CMP, dl, MVT::i1, Op,
12149 // DAG.getConstant(0, MVT::i1));
12150 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
12151 DAG.getConstant(0, Op.getValueType()));
12153 unsigned Opcode = 0;
12154 unsigned NumOperands = 0;
12156 // Truncate operations may prevent the merge of the SETCC instruction
12157 // and the arithmetic instruction before it. Attempt to truncate the operands
12158 // of the arithmetic instruction and use a reduced bit-width instruction.
12159 bool NeedTruncation = false;
12160 SDValue ArithOp = Op;
12161 if (Op->getOpcode() == ISD::TRUNCATE && Op->hasOneUse()) {
12162 SDValue Arith = Op->getOperand(0);
12163 // Both the trunc and the arithmetic op need to have one user each.
12164 if (Arith->hasOneUse())
12165 switch (Arith.getOpcode()) {
12172 NeedTruncation = true;
12178 // NOTICE: In the code below we use ArithOp to hold the arithmetic operation
12179 // which may be the result of a CAST. We use the variable 'Op', which is the
12180 // non-casted variable when we check for possible users.
12181 switch (ArithOp.getOpcode()) {
12183 // Due to an isel shortcoming, be conservative if this add is likely to be
12184 // selected as part of a load-modify-store instruction. When the root node
12185 // in a match is a store, isel doesn't know how to remap non-chain non-flag
12186 // uses of other nodes in the match, such as the ADD in this case. This
12187 // leads to the ADD being left around and reselected, with the result being
12188 // two adds in the output. Alas, even if none our users are stores, that
12189 // doesn't prove we're O.K. Ergo, if we have any parents that aren't
12190 // CopyToReg or SETCC, eschew INC/DEC. A better fix seems to require
12191 // climbing the DAG back to the root, and it doesn't seem to be worth the
12193 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
12194 UE = Op.getNode()->use_end(); UI != UE; ++UI)
12195 if (UI->getOpcode() != ISD::CopyToReg &&
12196 UI->getOpcode() != ISD::SETCC &&
12197 UI->getOpcode() != ISD::STORE)
12200 if (ConstantSDNode *C =
12201 dyn_cast<ConstantSDNode>(ArithOp.getNode()->getOperand(1))) {
12202 // An add of one will be selected as an INC.
12203 if (C->getAPIntValue() == 1 && !Subtarget->slowIncDec()) {
12204 Opcode = X86ISD::INC;
12209 // An add of negative one (subtract of one) will be selected as a DEC.
12210 if (C->getAPIntValue().isAllOnesValue() && !Subtarget->slowIncDec()) {
12211 Opcode = X86ISD::DEC;
12217 // Otherwise use a regular EFLAGS-setting add.
12218 Opcode = X86ISD::ADD;
12223 // If we have a constant logical shift that's only used in a comparison
12224 // against zero turn it into an equivalent AND. This allows turning it into
12225 // a TEST instruction later.
12226 if ((X86CC == X86::COND_E || X86CC == X86::COND_NE) && Op->hasOneUse() &&
12227 isa<ConstantSDNode>(Op->getOperand(1)) && !hasNonFlagsUse(Op)) {
12228 EVT VT = Op.getValueType();
12229 unsigned BitWidth = VT.getSizeInBits();
12230 unsigned ShAmt = Op->getConstantOperandVal(1);
12231 if (ShAmt >= BitWidth) // Avoid undefined shifts.
12233 APInt Mask = ArithOp.getOpcode() == ISD::SRL
12234 ? APInt::getHighBitsSet(BitWidth, BitWidth - ShAmt)
12235 : APInt::getLowBitsSet(BitWidth, BitWidth - ShAmt);
12236 if (!Mask.isSignedIntN(32)) // Avoid large immediates.
12238 SDValue New = DAG.getNode(ISD::AND, dl, VT, Op->getOperand(0),
12239 DAG.getConstant(Mask, VT));
12240 DAG.ReplaceAllUsesWith(Op, New);
12246 // If the primary and result isn't used, don't bother using X86ISD::AND,
12247 // because a TEST instruction will be better.
12248 if (!hasNonFlagsUse(Op))
12254 // Due to the ISEL shortcoming noted above, be conservative if this op is
12255 // likely to be selected as part of a load-modify-store instruction.
12256 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
12257 UE = Op.getNode()->use_end(); UI != UE; ++UI)
12258 if (UI->getOpcode() == ISD::STORE)
12261 // Otherwise use a regular EFLAGS-setting instruction.
12262 switch (ArithOp.getOpcode()) {
12263 default: llvm_unreachable("unexpected operator!");
12264 case ISD::SUB: Opcode = X86ISD::SUB; break;
12265 case ISD::XOR: Opcode = X86ISD::XOR; break;
12266 case ISD::AND: Opcode = X86ISD::AND; break;
12268 if (!NeedTruncation && (X86CC == X86::COND_E || X86CC == X86::COND_NE)) {
12269 SDValue EFLAGS = LowerVectorAllZeroTest(Op, Subtarget, DAG);
12270 if (EFLAGS.getNode())
12273 Opcode = X86ISD::OR;
12287 return SDValue(Op.getNode(), 1);
12293 // If we found that truncation is beneficial, perform the truncation and
12295 if (NeedTruncation) {
12296 EVT VT = Op.getValueType();
12297 SDValue WideVal = Op->getOperand(0);
12298 EVT WideVT = WideVal.getValueType();
12299 unsigned ConvertedOp = 0;
12300 // Use a target machine opcode to prevent further DAGCombine
12301 // optimizations that may separate the arithmetic operations
12302 // from the setcc node.
12303 switch (WideVal.getOpcode()) {
12305 case ISD::ADD: ConvertedOp = X86ISD::ADD; break;
12306 case ISD::SUB: ConvertedOp = X86ISD::SUB; break;
12307 case ISD::AND: ConvertedOp = X86ISD::AND; break;
12308 case ISD::OR: ConvertedOp = X86ISD::OR; break;
12309 case ISD::XOR: ConvertedOp = X86ISD::XOR; break;
12313 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
12314 if (TLI.isOperationLegal(WideVal.getOpcode(), WideVT)) {
12315 SDValue V0 = DAG.getNode(ISD::TRUNCATE, dl, VT, WideVal.getOperand(0));
12316 SDValue V1 = DAG.getNode(ISD::TRUNCATE, dl, VT, WideVal.getOperand(1));
12317 Op = DAG.getNode(ConvertedOp, dl, VT, V0, V1);
12323 // Emit a CMP with 0, which is the TEST pattern.
12324 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
12325 DAG.getConstant(0, Op.getValueType()));
12327 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32);
12328 SmallVector<SDValue, 4> Ops;
12329 for (unsigned i = 0; i != NumOperands; ++i)
12330 Ops.push_back(Op.getOperand(i));
12332 SDValue New = DAG.getNode(Opcode, dl, VTs, Ops);
12333 DAG.ReplaceAllUsesWith(Op, New);
12334 return SDValue(New.getNode(), 1);
12337 /// Emit nodes that will be selected as "cmp Op0,Op1", or something
12339 SDValue X86TargetLowering::EmitCmp(SDValue Op0, SDValue Op1, unsigned X86CC,
12340 SDLoc dl, SelectionDAG &DAG) const {
12341 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op1)) {
12342 if (C->getAPIntValue() == 0)
12343 return EmitTest(Op0, X86CC, dl, DAG);
12345 if (Op0.getValueType() == MVT::i1)
12346 llvm_unreachable("Unexpected comparison operation for MVT::i1 operands");
12349 if ((Op0.getValueType() == MVT::i8 || Op0.getValueType() == MVT::i16 ||
12350 Op0.getValueType() == MVT::i32 || Op0.getValueType() == MVT::i64)) {
12351 // Do the comparison at i32 if it's smaller, besides the Atom case.
12352 // This avoids subregister aliasing issues. Keep the smaller reference
12353 // if we're optimizing for size, however, as that'll allow better folding
12354 // of memory operations.
12355 if (Op0.getValueType() != MVT::i32 && Op0.getValueType() != MVT::i64 &&
12356 !DAG.getMachineFunction().getFunction()->getAttributes().hasAttribute(
12357 AttributeSet::FunctionIndex, Attribute::MinSize) &&
12358 !Subtarget->isAtom()) {
12359 unsigned ExtendOp =
12360 isX86CCUnsigned(X86CC) ? ISD::ZERO_EXTEND : ISD::SIGN_EXTEND;
12361 Op0 = DAG.getNode(ExtendOp, dl, MVT::i32, Op0);
12362 Op1 = DAG.getNode(ExtendOp, dl, MVT::i32, Op1);
12364 // Use SUB instead of CMP to enable CSE between SUB and CMP.
12365 SDVTList VTs = DAG.getVTList(Op0.getValueType(), MVT::i32);
12366 SDValue Sub = DAG.getNode(X86ISD::SUB, dl, VTs,
12368 return SDValue(Sub.getNode(), 1);
12370 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op0, Op1);
12373 /// Convert a comparison if required by the subtarget.
12374 SDValue X86TargetLowering::ConvertCmpIfNecessary(SDValue Cmp,
12375 SelectionDAG &DAG) const {
12376 // If the subtarget does not support the FUCOMI instruction, floating-point
12377 // comparisons have to be converted.
12378 if (Subtarget->hasCMov() ||
12379 Cmp.getOpcode() != X86ISD::CMP ||
12380 !Cmp.getOperand(0).getValueType().isFloatingPoint() ||
12381 !Cmp.getOperand(1).getValueType().isFloatingPoint())
12384 // The instruction selector will select an FUCOM instruction instead of
12385 // FUCOMI, which writes the comparison result to FPSW instead of EFLAGS. Hence
12386 // build an SDNode sequence that transfers the result from FPSW into EFLAGS:
12387 // (X86sahf (trunc (srl (X86fp_stsw (trunc (X86cmp ...)), 8))))
12389 SDValue TruncFPSW = DAG.getNode(ISD::TRUNCATE, dl, MVT::i16, Cmp);
12390 SDValue FNStSW = DAG.getNode(X86ISD::FNSTSW16r, dl, MVT::i16, TruncFPSW);
12391 SDValue Srl = DAG.getNode(ISD::SRL, dl, MVT::i16, FNStSW,
12392 DAG.getConstant(8, MVT::i8));
12393 SDValue TruncSrl = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Srl);
12394 return DAG.getNode(X86ISD::SAHF, dl, MVT::i32, TruncSrl);
12397 static bool isAllOnes(SDValue V) {
12398 ConstantSDNode *C = dyn_cast<ConstantSDNode>(V);
12399 return C && C->isAllOnesValue();
12402 /// LowerToBT - Result of 'and' is compared against zero. Turn it into a BT node
12403 /// if it's possible.
12404 SDValue X86TargetLowering::LowerToBT(SDValue And, ISD::CondCode CC,
12405 SDLoc dl, SelectionDAG &DAG) const {
12406 SDValue Op0 = And.getOperand(0);
12407 SDValue Op1 = And.getOperand(1);
12408 if (Op0.getOpcode() == ISD::TRUNCATE)
12409 Op0 = Op0.getOperand(0);
12410 if (Op1.getOpcode() == ISD::TRUNCATE)
12411 Op1 = Op1.getOperand(0);
12414 if (Op1.getOpcode() == ISD::SHL)
12415 std::swap(Op0, Op1);
12416 if (Op0.getOpcode() == ISD::SHL) {
12417 if (ConstantSDNode *And00C = dyn_cast<ConstantSDNode>(Op0.getOperand(0)))
12418 if (And00C->getZExtValue() == 1) {
12419 // If we looked past a truncate, check that it's only truncating away
12421 unsigned BitWidth = Op0.getValueSizeInBits();
12422 unsigned AndBitWidth = And.getValueSizeInBits();
12423 if (BitWidth > AndBitWidth) {
12425 DAG.computeKnownBits(Op0, Zeros, Ones);
12426 if (Zeros.countLeadingOnes() < BitWidth - AndBitWidth)
12430 RHS = Op0.getOperand(1);
12432 } else if (Op1.getOpcode() == ISD::Constant) {
12433 ConstantSDNode *AndRHS = cast<ConstantSDNode>(Op1);
12434 uint64_t AndRHSVal = AndRHS->getZExtValue();
12435 SDValue AndLHS = Op0;
12437 if (AndRHSVal == 1 && AndLHS.getOpcode() == ISD::SRL) {
12438 LHS = AndLHS.getOperand(0);
12439 RHS = AndLHS.getOperand(1);
12442 // Use BT if the immediate can't be encoded in a TEST instruction.
12443 if (!isUInt<32>(AndRHSVal) && isPowerOf2_64(AndRHSVal)) {
12445 RHS = DAG.getConstant(Log2_64_Ceil(AndRHSVal), LHS.getValueType());
12449 if (LHS.getNode()) {
12450 // If LHS is i8, promote it to i32 with any_extend. There is no i8 BT
12451 // instruction. Since the shift amount is in-range-or-undefined, we know
12452 // that doing a bittest on the i32 value is ok. We extend to i32 because
12453 // the encoding for the i16 version is larger than the i32 version.
12454 // Also promote i16 to i32 for performance / code size reason.
12455 if (LHS.getValueType() == MVT::i8 ||
12456 LHS.getValueType() == MVT::i16)
12457 LHS = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, LHS);
12459 // If the operand types disagree, extend the shift amount to match. Since
12460 // BT ignores high bits (like shifts) we can use anyextend.
12461 if (LHS.getValueType() != RHS.getValueType())
12462 RHS = DAG.getNode(ISD::ANY_EXTEND, dl, LHS.getValueType(), RHS);
12464 SDValue BT = DAG.getNode(X86ISD::BT, dl, MVT::i32, LHS, RHS);
12465 X86::CondCode Cond = CC == ISD::SETEQ ? X86::COND_AE : X86::COND_B;
12466 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
12467 DAG.getConstant(Cond, MVT::i8), BT);
12473 /// \brief - Turns an ISD::CondCode into a value suitable for SSE floating point
12475 static int translateX86FSETCC(ISD::CondCode SetCCOpcode, SDValue &Op0,
12480 // SSE Condition code mapping:
12489 switch (SetCCOpcode) {
12490 default: llvm_unreachable("Unexpected SETCC condition");
12492 case ISD::SETEQ: SSECC = 0; break;
12494 case ISD::SETGT: Swap = true; // Fallthrough
12496 case ISD::SETOLT: SSECC = 1; break;
12498 case ISD::SETGE: Swap = true; // Fallthrough
12500 case ISD::SETOLE: SSECC = 2; break;
12501 case ISD::SETUO: SSECC = 3; break;
12503 case ISD::SETNE: SSECC = 4; break;
12504 case ISD::SETULE: Swap = true; // Fallthrough
12505 case ISD::SETUGE: SSECC = 5; break;
12506 case ISD::SETULT: Swap = true; // Fallthrough
12507 case ISD::SETUGT: SSECC = 6; break;
12508 case ISD::SETO: SSECC = 7; break;
12510 case ISD::SETONE: SSECC = 8; break;
12513 std::swap(Op0, Op1);
12518 // Lower256IntVSETCC - Break a VSETCC 256-bit integer VSETCC into two new 128
12519 // ones, and then concatenate the result back.
12520 static SDValue Lower256IntVSETCC(SDValue Op, SelectionDAG &DAG) {
12521 MVT VT = Op.getSimpleValueType();
12523 assert(VT.is256BitVector() && Op.getOpcode() == ISD::SETCC &&
12524 "Unsupported value type for operation");
12526 unsigned NumElems = VT.getVectorNumElements();
12528 SDValue CC = Op.getOperand(2);
12530 // Extract the LHS vectors
12531 SDValue LHS = Op.getOperand(0);
12532 SDValue LHS1 = Extract128BitVector(LHS, 0, DAG, dl);
12533 SDValue LHS2 = Extract128BitVector(LHS, NumElems/2, DAG, dl);
12535 // Extract the RHS vectors
12536 SDValue RHS = Op.getOperand(1);
12537 SDValue RHS1 = Extract128BitVector(RHS, 0, DAG, dl);
12538 SDValue RHS2 = Extract128BitVector(RHS, NumElems/2, DAG, dl);
12540 // Issue the operation on the smaller types and concatenate the result back
12541 MVT EltVT = VT.getVectorElementType();
12542 MVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
12543 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT,
12544 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, RHS1, CC),
12545 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, RHS2, CC));
12548 static SDValue LowerIntVSETCC_AVX512(SDValue Op, SelectionDAG &DAG,
12549 const X86Subtarget *Subtarget) {
12550 SDValue Op0 = Op.getOperand(0);
12551 SDValue Op1 = Op.getOperand(1);
12552 SDValue CC = Op.getOperand(2);
12553 MVT VT = Op.getSimpleValueType();
12556 assert(Op0.getValueType().getVectorElementType().getSizeInBits() >= 32 &&
12557 Op.getValueType().getScalarType() == MVT::i1 &&
12558 "Cannot set masked compare for this operation");
12560 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
12562 bool Unsigned = false;
12565 switch (SetCCOpcode) {
12566 default: llvm_unreachable("Unexpected SETCC condition");
12567 case ISD::SETNE: SSECC = 4; break;
12568 case ISD::SETEQ: Opc = X86ISD::PCMPEQM; break;
12569 case ISD::SETUGT: SSECC = 6; Unsigned = true; break;
12570 case ISD::SETLT: Swap = true; //fall-through
12571 case ISD::SETGT: Opc = X86ISD::PCMPGTM; break;
12572 case ISD::SETULT: SSECC = 1; Unsigned = true; break;
12573 case ISD::SETUGE: SSECC = 5; Unsigned = true; break; //NLT
12574 case ISD::SETGE: Swap = true; SSECC = 2; break; // LE + swap
12575 case ISD::SETULE: Unsigned = true; //fall-through
12576 case ISD::SETLE: SSECC = 2; break;
12580 std::swap(Op0, Op1);
12582 return DAG.getNode(Opc, dl, VT, Op0, Op1);
12583 Opc = Unsigned ? X86ISD::CMPMU: X86ISD::CMPM;
12584 return DAG.getNode(Opc, dl, VT, Op0, Op1,
12585 DAG.getConstant(SSECC, MVT::i8));
12588 /// \brief Try to turn a VSETULT into a VSETULE by modifying its second
12589 /// operand \p Op1. If non-trivial (for example because it's not constant)
12590 /// return an empty value.
12591 static SDValue ChangeVSETULTtoVSETULE(SDLoc dl, SDValue Op1, SelectionDAG &DAG)
12593 BuildVectorSDNode *BV = dyn_cast<BuildVectorSDNode>(Op1.getNode());
12597 MVT VT = Op1.getSimpleValueType();
12598 MVT EVT = VT.getVectorElementType();
12599 unsigned n = VT.getVectorNumElements();
12600 SmallVector<SDValue, 8> ULTOp1;
12602 for (unsigned i = 0; i < n; ++i) {
12603 ConstantSDNode *Elt = dyn_cast<ConstantSDNode>(BV->getOperand(i));
12604 if (!Elt || Elt->isOpaque() || Elt->getValueType(0) != EVT)
12607 // Avoid underflow.
12608 APInt Val = Elt->getAPIntValue();
12612 ULTOp1.push_back(DAG.getConstant(Val - 1, EVT));
12615 return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, ULTOp1);
12618 static SDValue LowerVSETCC(SDValue Op, const X86Subtarget *Subtarget,
12619 SelectionDAG &DAG) {
12620 SDValue Op0 = Op.getOperand(0);
12621 SDValue Op1 = Op.getOperand(1);
12622 SDValue CC = Op.getOperand(2);
12623 MVT VT = Op.getSimpleValueType();
12624 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
12625 bool isFP = Op.getOperand(1).getSimpleValueType().isFloatingPoint();
12630 MVT EltVT = Op0.getSimpleValueType().getVectorElementType();
12631 assert(EltVT == MVT::f32 || EltVT == MVT::f64);
12634 unsigned SSECC = translateX86FSETCC(SetCCOpcode, Op0, Op1);
12635 unsigned Opc = X86ISD::CMPP;
12636 if (Subtarget->hasAVX512() && VT.getVectorElementType() == MVT::i1) {
12637 assert(VT.getVectorNumElements() <= 16);
12638 Opc = X86ISD::CMPM;
12640 // In the two special cases we can't handle, emit two comparisons.
12643 unsigned CombineOpc;
12644 if (SetCCOpcode == ISD::SETUEQ) {
12645 CC0 = 3; CC1 = 0; CombineOpc = ISD::OR;
12647 assert(SetCCOpcode == ISD::SETONE);
12648 CC0 = 7; CC1 = 4; CombineOpc = ISD::AND;
12651 SDValue Cmp0 = DAG.getNode(Opc, dl, VT, Op0, Op1,
12652 DAG.getConstant(CC0, MVT::i8));
12653 SDValue Cmp1 = DAG.getNode(Opc, dl, VT, Op0, Op1,
12654 DAG.getConstant(CC1, MVT::i8));
12655 return DAG.getNode(CombineOpc, dl, VT, Cmp0, Cmp1);
12657 // Handle all other FP comparisons here.
12658 return DAG.getNode(Opc, dl, VT, Op0, Op1,
12659 DAG.getConstant(SSECC, MVT::i8));
12662 // Break 256-bit integer vector compare into smaller ones.
12663 if (VT.is256BitVector() && !Subtarget->hasInt256())
12664 return Lower256IntVSETCC(Op, DAG);
12666 bool MaskResult = (VT.getVectorElementType() == MVT::i1);
12667 EVT OpVT = Op1.getValueType();
12668 if (Subtarget->hasAVX512()) {
12669 if (Op1.getValueType().is512BitVector() ||
12670 (MaskResult && OpVT.getVectorElementType().getSizeInBits() >= 32))
12671 return LowerIntVSETCC_AVX512(Op, DAG, Subtarget);
12673 // In AVX-512 architecture setcc returns mask with i1 elements,
12674 // But there is no compare instruction for i8 and i16 elements.
12675 // We are not talking about 512-bit operands in this case, these
12676 // types are illegal.
12678 (OpVT.getVectorElementType().getSizeInBits() < 32 &&
12679 OpVT.getVectorElementType().getSizeInBits() >= 8))
12680 return DAG.getNode(ISD::TRUNCATE, dl, VT,
12681 DAG.getNode(ISD::SETCC, dl, OpVT, Op0, Op1, CC));
12684 // We are handling one of the integer comparisons here. Since SSE only has
12685 // GT and EQ comparisons for integer, swapping operands and multiple
12686 // operations may be required for some comparisons.
12688 bool Swap = false, Invert = false, FlipSigns = false, MinMax = false;
12689 bool Subus = false;
12691 switch (SetCCOpcode) {
12692 default: llvm_unreachable("Unexpected SETCC condition");
12693 case ISD::SETNE: Invert = true;
12694 case ISD::SETEQ: Opc = X86ISD::PCMPEQ; break;
12695 case ISD::SETLT: Swap = true;
12696 case ISD::SETGT: Opc = X86ISD::PCMPGT; break;
12697 case ISD::SETGE: Swap = true;
12698 case ISD::SETLE: Opc = X86ISD::PCMPGT;
12699 Invert = true; break;
12700 case ISD::SETULT: Swap = true;
12701 case ISD::SETUGT: Opc = X86ISD::PCMPGT;
12702 FlipSigns = true; break;
12703 case ISD::SETUGE: Swap = true;
12704 case ISD::SETULE: Opc = X86ISD::PCMPGT;
12705 FlipSigns = true; Invert = true; break;
12708 // Special case: Use min/max operations for SETULE/SETUGE
12709 MVT VET = VT.getVectorElementType();
12711 (Subtarget->hasSSE41() && (VET >= MVT::i8 && VET <= MVT::i32))
12712 || (Subtarget->hasSSE2() && (VET == MVT::i8));
12715 switch (SetCCOpcode) {
12717 case ISD::SETULE: Opc = X86ISD::UMIN; MinMax = true; break;
12718 case ISD::SETUGE: Opc = X86ISD::UMAX; MinMax = true; break;
12721 if (MinMax) { Swap = false; Invert = false; FlipSigns = false; }
12724 bool hasSubus = Subtarget->hasSSE2() && (VET == MVT::i8 || VET == MVT::i16);
12725 if (!MinMax && hasSubus) {
12726 // As another special case, use PSUBUS[BW] when it's profitable. E.g. for
12728 // t = psubus Op0, Op1
12729 // pcmpeq t, <0..0>
12730 switch (SetCCOpcode) {
12732 case ISD::SETULT: {
12733 // If the comparison is against a constant we can turn this into a
12734 // setule. With psubus, setule does not require a swap. This is
12735 // beneficial because the constant in the register is no longer
12736 // destructed as the destination so it can be hoisted out of a loop.
12737 // Only do this pre-AVX since vpcmp* is no longer destructive.
12738 if (Subtarget->hasAVX())
12740 SDValue ULEOp1 = ChangeVSETULTtoVSETULE(dl, Op1, DAG);
12741 if (ULEOp1.getNode()) {
12743 Subus = true; Invert = false; Swap = false;
12747 // Psubus is better than flip-sign because it requires no inversion.
12748 case ISD::SETUGE: Subus = true; Invert = false; Swap = true; break;
12749 case ISD::SETULE: Subus = true; Invert = false; Swap = false; break;
12753 Opc = X86ISD::SUBUS;
12759 std::swap(Op0, Op1);
12761 // Check that the operation in question is available (most are plain SSE2,
12762 // but PCMPGTQ and PCMPEQQ have different requirements).
12763 if (VT == MVT::v2i64) {
12764 if (Opc == X86ISD::PCMPGT && !Subtarget->hasSSE42()) {
12765 assert(Subtarget->hasSSE2() && "Don't know how to lower!");
12767 // First cast everything to the right type.
12768 Op0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Op0);
12769 Op1 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Op1);
12771 // Since SSE has no unsigned integer comparisons, we need to flip the sign
12772 // bits of the inputs before performing those operations. The lower
12773 // compare is always unsigned.
12776 SB = DAG.getConstant(0x80000000U, MVT::v4i32);
12778 SDValue Sign = DAG.getConstant(0x80000000U, MVT::i32);
12779 SDValue Zero = DAG.getConstant(0x00000000U, MVT::i32);
12780 SB = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
12781 Sign, Zero, Sign, Zero);
12783 Op0 = DAG.getNode(ISD::XOR, dl, MVT::v4i32, Op0, SB);
12784 Op1 = DAG.getNode(ISD::XOR, dl, MVT::v4i32, Op1, SB);
12786 // Emulate PCMPGTQ with (hi1 > hi2) | ((hi1 == hi2) & (lo1 > lo2))
12787 SDValue GT = DAG.getNode(X86ISD::PCMPGT, dl, MVT::v4i32, Op0, Op1);
12788 SDValue EQ = DAG.getNode(X86ISD::PCMPEQ, dl, MVT::v4i32, Op0, Op1);
12790 // Create masks for only the low parts/high parts of the 64 bit integers.
12791 static const int MaskHi[] = { 1, 1, 3, 3 };
12792 static const int MaskLo[] = { 0, 0, 2, 2 };
12793 SDValue EQHi = DAG.getVectorShuffle(MVT::v4i32, dl, EQ, EQ, MaskHi);
12794 SDValue GTLo = DAG.getVectorShuffle(MVT::v4i32, dl, GT, GT, MaskLo);
12795 SDValue GTHi = DAG.getVectorShuffle(MVT::v4i32, dl, GT, GT, MaskHi);
12797 SDValue Result = DAG.getNode(ISD::AND, dl, MVT::v4i32, EQHi, GTLo);
12798 Result = DAG.getNode(ISD::OR, dl, MVT::v4i32, Result, GTHi);
12801 Result = DAG.getNOT(dl, Result, MVT::v4i32);
12803 return DAG.getNode(ISD::BITCAST, dl, VT, Result);
12806 if (Opc == X86ISD::PCMPEQ && !Subtarget->hasSSE41()) {
12807 // If pcmpeqq is missing but pcmpeqd is available synthesize pcmpeqq with
12808 // pcmpeqd + pshufd + pand.
12809 assert(Subtarget->hasSSE2() && !FlipSigns && "Don't know how to lower!");
12811 // First cast everything to the right type.
12812 Op0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Op0);
12813 Op1 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Op1);
12816 SDValue Result = DAG.getNode(Opc, dl, MVT::v4i32, Op0, Op1);
12818 // Make sure the lower and upper halves are both all-ones.
12819 static const int Mask[] = { 1, 0, 3, 2 };
12820 SDValue Shuf = DAG.getVectorShuffle(MVT::v4i32, dl, Result, Result, Mask);
12821 Result = DAG.getNode(ISD::AND, dl, MVT::v4i32, Result, Shuf);
12824 Result = DAG.getNOT(dl, Result, MVT::v4i32);
12826 return DAG.getNode(ISD::BITCAST, dl, VT, Result);
12830 // Since SSE has no unsigned integer comparisons, we need to flip the sign
12831 // bits of the inputs before performing those operations.
12833 EVT EltVT = VT.getVectorElementType();
12834 SDValue SB = DAG.getConstant(APInt::getSignBit(EltVT.getSizeInBits()), VT);
12835 Op0 = DAG.getNode(ISD::XOR, dl, VT, Op0, SB);
12836 Op1 = DAG.getNode(ISD::XOR, dl, VT, Op1, SB);
12839 SDValue Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
12841 // If the logical-not of the result is required, perform that now.
12843 Result = DAG.getNOT(dl, Result, VT);
12846 Result = DAG.getNode(X86ISD::PCMPEQ, dl, VT, Op0, Result);
12849 Result = DAG.getNode(X86ISD::PCMPEQ, dl, VT, Result,
12850 getZeroVector(VT, Subtarget, DAG, dl));
12855 SDValue X86TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
12857 MVT VT = Op.getSimpleValueType();
12859 if (VT.isVector()) return LowerVSETCC(Op, Subtarget, DAG);
12861 assert(((!Subtarget->hasAVX512() && VT == MVT::i8) || (VT == MVT::i1))
12862 && "SetCC type must be 8-bit or 1-bit integer");
12863 SDValue Op0 = Op.getOperand(0);
12864 SDValue Op1 = Op.getOperand(1);
12866 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
12868 // Optimize to BT if possible.
12869 // Lower (X & (1 << N)) == 0 to BT(X, N).
12870 // Lower ((X >>u N) & 1) != 0 to BT(X, N).
12871 // Lower ((X >>s N) & 1) != 0 to BT(X, N).
12872 if (Op0.getOpcode() == ISD::AND && Op0.hasOneUse() &&
12873 Op1.getOpcode() == ISD::Constant &&
12874 cast<ConstantSDNode>(Op1)->isNullValue() &&
12875 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
12876 SDValue NewSetCC = LowerToBT(Op0, CC, dl, DAG);
12877 if (NewSetCC.getNode())
12881 // Look for X == 0, X == 1, X != 0, or X != 1. We can simplify some forms of
12883 if (Op1.getOpcode() == ISD::Constant &&
12884 (cast<ConstantSDNode>(Op1)->getZExtValue() == 1 ||
12885 cast<ConstantSDNode>(Op1)->isNullValue()) &&
12886 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
12888 // If the input is a setcc, then reuse the input setcc or use a new one with
12889 // the inverted condition.
12890 if (Op0.getOpcode() == X86ISD::SETCC) {
12891 X86::CondCode CCode = (X86::CondCode)Op0.getConstantOperandVal(0);
12892 bool Invert = (CC == ISD::SETNE) ^
12893 cast<ConstantSDNode>(Op1)->isNullValue();
12897 CCode = X86::GetOppositeBranchCondition(CCode);
12898 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
12899 DAG.getConstant(CCode, MVT::i8),
12900 Op0.getOperand(1));
12902 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i1, SetCC);
12906 if ((Op0.getValueType() == MVT::i1) && (Op1.getOpcode() == ISD::Constant) &&
12907 (cast<ConstantSDNode>(Op1)->getZExtValue() == 1) &&
12908 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
12910 ISD::CondCode NewCC = ISD::getSetCCInverse(CC, true);
12911 return DAG.getSetCC(dl, VT, Op0, DAG.getConstant(0, MVT::i1), NewCC);
12914 bool isFP = Op1.getSimpleValueType().isFloatingPoint();
12915 unsigned X86CC = TranslateX86CC(CC, isFP, Op0, Op1, DAG);
12916 if (X86CC == X86::COND_INVALID)
12919 SDValue EFLAGS = EmitCmp(Op0, Op1, X86CC, dl, DAG);
12920 EFLAGS = ConvertCmpIfNecessary(EFLAGS, DAG);
12921 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
12922 DAG.getConstant(X86CC, MVT::i8), EFLAGS);
12924 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i1, SetCC);
12928 // isX86LogicalCmp - Return true if opcode is a X86 logical comparison.
12929 static bool isX86LogicalCmp(SDValue Op) {
12930 unsigned Opc = Op.getNode()->getOpcode();
12931 if (Opc == X86ISD::CMP || Opc == X86ISD::COMI || Opc == X86ISD::UCOMI ||
12932 Opc == X86ISD::SAHF)
12934 if (Op.getResNo() == 1 &&
12935 (Opc == X86ISD::ADD ||
12936 Opc == X86ISD::SUB ||
12937 Opc == X86ISD::ADC ||
12938 Opc == X86ISD::SBB ||
12939 Opc == X86ISD::SMUL ||
12940 Opc == X86ISD::UMUL ||
12941 Opc == X86ISD::INC ||
12942 Opc == X86ISD::DEC ||
12943 Opc == X86ISD::OR ||
12944 Opc == X86ISD::XOR ||
12945 Opc == X86ISD::AND))
12948 if (Op.getResNo() == 2 && Opc == X86ISD::UMUL)
12954 static bool isTruncWithZeroHighBitsInput(SDValue V, SelectionDAG &DAG) {
12955 if (V.getOpcode() != ISD::TRUNCATE)
12958 SDValue VOp0 = V.getOperand(0);
12959 unsigned InBits = VOp0.getValueSizeInBits();
12960 unsigned Bits = V.getValueSizeInBits();
12961 return DAG.MaskedValueIsZero(VOp0, APInt::getHighBitsSet(InBits,InBits-Bits));
12964 SDValue X86TargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
12965 bool addTest = true;
12966 SDValue Cond = Op.getOperand(0);
12967 SDValue Op1 = Op.getOperand(1);
12968 SDValue Op2 = Op.getOperand(2);
12970 EVT VT = Op1.getValueType();
12973 // Lower fp selects into a CMP/AND/ANDN/OR sequence when the necessary SSE ops
12974 // are available. Otherwise fp cmovs get lowered into a less efficient branch
12975 // sequence later on.
12976 if (Cond.getOpcode() == ISD::SETCC &&
12977 ((Subtarget->hasSSE2() && (VT == MVT::f32 || VT == MVT::f64)) ||
12978 (Subtarget->hasSSE1() && VT == MVT::f32)) &&
12979 VT == Cond.getOperand(0).getValueType() && Cond->hasOneUse()) {
12980 SDValue CondOp0 = Cond.getOperand(0), CondOp1 = Cond.getOperand(1);
12981 int SSECC = translateX86FSETCC(
12982 cast<CondCodeSDNode>(Cond.getOperand(2))->get(), CondOp0, CondOp1);
12985 if (Subtarget->hasAVX512()) {
12986 SDValue Cmp = DAG.getNode(X86ISD::FSETCC, DL, MVT::i1, CondOp0, CondOp1,
12987 DAG.getConstant(SSECC, MVT::i8));
12988 return DAG.getNode(X86ISD::SELECT, DL, VT, Cmp, Op1, Op2);
12990 SDValue Cmp = DAG.getNode(X86ISD::FSETCC, DL, VT, CondOp0, CondOp1,
12991 DAG.getConstant(SSECC, MVT::i8));
12992 SDValue AndN = DAG.getNode(X86ISD::FANDN, DL, VT, Cmp, Op2);
12993 SDValue And = DAG.getNode(X86ISD::FAND, DL, VT, Cmp, Op1);
12994 return DAG.getNode(X86ISD::FOR, DL, VT, AndN, And);
12998 if (Cond.getOpcode() == ISD::SETCC) {
12999 SDValue NewCond = LowerSETCC(Cond, DAG);
13000 if (NewCond.getNode())
13004 // (select (x == 0), -1, y) -> (sign_bit (x - 1)) | y
13005 // (select (x == 0), y, -1) -> ~(sign_bit (x - 1)) | y
13006 // (select (x != 0), y, -1) -> (sign_bit (x - 1)) | y
13007 // (select (x != 0), -1, y) -> ~(sign_bit (x - 1)) | y
13008 if (Cond.getOpcode() == X86ISD::SETCC &&
13009 Cond.getOperand(1).getOpcode() == X86ISD::CMP &&
13010 isZero(Cond.getOperand(1).getOperand(1))) {
13011 SDValue Cmp = Cond.getOperand(1);
13013 unsigned CondCode =cast<ConstantSDNode>(Cond.getOperand(0))->getZExtValue();
13015 if ((isAllOnes(Op1) || isAllOnes(Op2)) &&
13016 (CondCode == X86::COND_E || CondCode == X86::COND_NE)) {
13017 SDValue Y = isAllOnes(Op2) ? Op1 : Op2;
13019 SDValue CmpOp0 = Cmp.getOperand(0);
13020 // Apply further optimizations for special cases
13021 // (select (x != 0), -1, 0) -> neg & sbb
13022 // (select (x == 0), 0, -1) -> neg & sbb
13023 if (ConstantSDNode *YC = dyn_cast<ConstantSDNode>(Y))
13024 if (YC->isNullValue() &&
13025 (isAllOnes(Op1) == (CondCode == X86::COND_NE))) {
13026 SDVTList VTs = DAG.getVTList(CmpOp0.getValueType(), MVT::i32);
13027 SDValue Neg = DAG.getNode(X86ISD::SUB, DL, VTs,
13028 DAG.getConstant(0, CmpOp0.getValueType()),
13030 SDValue Res = DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
13031 DAG.getConstant(X86::COND_B, MVT::i8),
13032 SDValue(Neg.getNode(), 1));
13036 Cmp = DAG.getNode(X86ISD::CMP, DL, MVT::i32,
13037 CmpOp0, DAG.getConstant(1, CmpOp0.getValueType()));
13038 Cmp = ConvertCmpIfNecessary(Cmp, DAG);
13040 SDValue Res = // Res = 0 or -1.
13041 DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
13042 DAG.getConstant(X86::COND_B, MVT::i8), Cmp);
13044 if (isAllOnes(Op1) != (CondCode == X86::COND_E))
13045 Res = DAG.getNOT(DL, Res, Res.getValueType());
13047 ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(Op2);
13048 if (!N2C || !N2C->isNullValue())
13049 Res = DAG.getNode(ISD::OR, DL, Res.getValueType(), Res, Y);
13054 // Look past (and (setcc_carry (cmp ...)), 1).
13055 if (Cond.getOpcode() == ISD::AND &&
13056 Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) {
13057 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Cond.getOperand(1));
13058 if (C && C->getAPIntValue() == 1)
13059 Cond = Cond.getOperand(0);
13062 // If condition flag is set by a X86ISD::CMP, then use it as the condition
13063 // setting operand in place of the X86ISD::SETCC.
13064 unsigned CondOpcode = Cond.getOpcode();
13065 if (CondOpcode == X86ISD::SETCC ||
13066 CondOpcode == X86ISD::SETCC_CARRY) {
13067 CC = Cond.getOperand(0);
13069 SDValue Cmp = Cond.getOperand(1);
13070 unsigned Opc = Cmp.getOpcode();
13071 MVT VT = Op.getSimpleValueType();
13073 bool IllegalFPCMov = false;
13074 if (VT.isFloatingPoint() && !VT.isVector() &&
13075 !isScalarFPTypeInSSEReg(VT)) // FPStack?
13076 IllegalFPCMov = !hasFPCMov(cast<ConstantSDNode>(CC)->getSExtValue());
13078 if ((isX86LogicalCmp(Cmp) && !IllegalFPCMov) ||
13079 Opc == X86ISD::BT) { // FIXME
13083 } else if (CondOpcode == ISD::USUBO || CondOpcode == ISD::SSUBO ||
13084 CondOpcode == ISD::UADDO || CondOpcode == ISD::SADDO ||
13085 ((CondOpcode == ISD::UMULO || CondOpcode == ISD::SMULO) &&
13086 Cond.getOperand(0).getValueType() != MVT::i8)) {
13087 SDValue LHS = Cond.getOperand(0);
13088 SDValue RHS = Cond.getOperand(1);
13089 unsigned X86Opcode;
13092 switch (CondOpcode) {
13093 case ISD::UADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_B; break;
13094 case ISD::SADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_O; break;
13095 case ISD::USUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_B; break;
13096 case ISD::SSUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_O; break;
13097 case ISD::UMULO: X86Opcode = X86ISD::UMUL; X86Cond = X86::COND_O; break;
13098 case ISD::SMULO: X86Opcode = X86ISD::SMUL; X86Cond = X86::COND_O; break;
13099 default: llvm_unreachable("unexpected overflowing operator");
13101 if (CondOpcode == ISD::UMULO)
13102 VTs = DAG.getVTList(LHS.getValueType(), LHS.getValueType(),
13105 VTs = DAG.getVTList(LHS.getValueType(), MVT::i32);
13107 SDValue X86Op = DAG.getNode(X86Opcode, DL, VTs, LHS, RHS);
13109 if (CondOpcode == ISD::UMULO)
13110 Cond = X86Op.getValue(2);
13112 Cond = X86Op.getValue(1);
13114 CC = DAG.getConstant(X86Cond, MVT::i8);
13119 // Look pass the truncate if the high bits are known zero.
13120 if (isTruncWithZeroHighBitsInput(Cond, DAG))
13121 Cond = Cond.getOperand(0);
13123 // We know the result of AND is compared against zero. Try to match
13125 if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) {
13126 SDValue NewSetCC = LowerToBT(Cond, ISD::SETNE, DL, DAG);
13127 if (NewSetCC.getNode()) {
13128 CC = NewSetCC.getOperand(0);
13129 Cond = NewSetCC.getOperand(1);
13136 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
13137 Cond = EmitTest(Cond, X86::COND_NE, DL, DAG);
13140 // a < b ? -1 : 0 -> RES = ~setcc_carry
13141 // a < b ? 0 : -1 -> RES = setcc_carry
13142 // a >= b ? -1 : 0 -> RES = setcc_carry
13143 // a >= b ? 0 : -1 -> RES = ~setcc_carry
13144 if (Cond.getOpcode() == X86ISD::SUB) {
13145 Cond = ConvertCmpIfNecessary(Cond, DAG);
13146 unsigned CondCode = cast<ConstantSDNode>(CC)->getZExtValue();
13148 if ((CondCode == X86::COND_AE || CondCode == X86::COND_B) &&
13149 (isAllOnes(Op1) || isAllOnes(Op2)) && (isZero(Op1) || isZero(Op2))) {
13150 SDValue Res = DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
13151 DAG.getConstant(X86::COND_B, MVT::i8), Cond);
13152 if (isAllOnes(Op1) != (CondCode == X86::COND_B))
13153 return DAG.getNOT(DL, Res, Res.getValueType());
13158 // X86 doesn't have an i8 cmov. If both operands are the result of a truncate
13159 // widen the cmov and push the truncate through. This avoids introducing a new
13160 // branch during isel and doesn't add any extensions.
13161 if (Op.getValueType() == MVT::i8 &&
13162 Op1.getOpcode() == ISD::TRUNCATE && Op2.getOpcode() == ISD::TRUNCATE) {
13163 SDValue T1 = Op1.getOperand(0), T2 = Op2.getOperand(0);
13164 if (T1.getValueType() == T2.getValueType() &&
13165 // Blacklist CopyFromReg to avoid partial register stalls.
13166 T1.getOpcode() != ISD::CopyFromReg && T2.getOpcode()!=ISD::CopyFromReg){
13167 SDVTList VTs = DAG.getVTList(T1.getValueType(), MVT::Glue);
13168 SDValue Cmov = DAG.getNode(X86ISD::CMOV, DL, VTs, T2, T1, CC, Cond);
13169 return DAG.getNode(ISD::TRUNCATE, DL, Op.getValueType(), Cmov);
13173 // X86ISD::CMOV means set the result (which is operand 1) to the RHS if
13174 // condition is true.
13175 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::Glue);
13176 SDValue Ops[] = { Op2, Op1, CC, Cond };
13177 return DAG.getNode(X86ISD::CMOV, DL, VTs, Ops);
13180 static SDValue LowerSIGN_EXTEND_AVX512(SDValue Op, SelectionDAG &DAG) {
13181 MVT VT = Op->getSimpleValueType(0);
13182 SDValue In = Op->getOperand(0);
13183 MVT InVT = In.getSimpleValueType();
13186 unsigned int NumElts = VT.getVectorNumElements();
13187 if (NumElts != 8 && NumElts != 16)
13190 if (VT.is512BitVector() && InVT.getVectorElementType() != MVT::i1)
13191 return DAG.getNode(X86ISD::VSEXT, dl, VT, In);
13193 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
13194 assert (InVT.getVectorElementType() == MVT::i1 && "Unexpected vector type");
13196 MVT ExtVT = (NumElts == 8) ? MVT::v8i64 : MVT::v16i32;
13197 Constant *C = ConstantInt::get(*DAG.getContext(),
13198 APInt::getAllOnesValue(ExtVT.getScalarType().getSizeInBits()));
13200 SDValue CP = DAG.getConstantPool(C, TLI.getPointerTy());
13201 unsigned Alignment = cast<ConstantPoolSDNode>(CP)->getAlignment();
13202 SDValue Ld = DAG.getLoad(ExtVT.getScalarType(), dl, DAG.getEntryNode(), CP,
13203 MachinePointerInfo::getConstantPool(),
13204 false, false, false, Alignment);
13205 SDValue Brcst = DAG.getNode(X86ISD::VBROADCASTM, dl, ExtVT, In, Ld);
13206 if (VT.is512BitVector())
13208 return DAG.getNode(X86ISD::VTRUNC, dl, VT, Brcst);
13211 static SDValue LowerSIGN_EXTEND(SDValue Op, const X86Subtarget *Subtarget,
13212 SelectionDAG &DAG) {
13213 MVT VT = Op->getSimpleValueType(0);
13214 SDValue In = Op->getOperand(0);
13215 MVT InVT = In.getSimpleValueType();
13218 if (VT.is512BitVector() || InVT.getVectorElementType() == MVT::i1)
13219 return LowerSIGN_EXTEND_AVX512(Op, DAG);
13221 if ((VT != MVT::v4i64 || InVT != MVT::v4i32) &&
13222 (VT != MVT::v8i32 || InVT != MVT::v8i16) &&
13223 (VT != MVT::v16i16 || InVT != MVT::v16i8))
13226 if (Subtarget->hasInt256())
13227 return DAG.getNode(X86ISD::VSEXT, dl, VT, In);
13229 // Optimize vectors in AVX mode
13230 // Sign extend v8i16 to v8i32 and
13233 // Divide input vector into two parts
13234 // for v4i32 the shuffle mask will be { 0, 1, -1, -1} {2, 3, -1, -1}
13235 // use vpmovsx instruction to extend v4i32 -> v2i64; v8i16 -> v4i32
13236 // concat the vectors to original VT
13238 unsigned NumElems = InVT.getVectorNumElements();
13239 SDValue Undef = DAG.getUNDEF(InVT);
13241 SmallVector<int,8> ShufMask1(NumElems, -1);
13242 for (unsigned i = 0; i != NumElems/2; ++i)
13245 SDValue OpLo = DAG.getVectorShuffle(InVT, dl, In, Undef, &ShufMask1[0]);
13247 SmallVector<int,8> ShufMask2(NumElems, -1);
13248 for (unsigned i = 0; i != NumElems/2; ++i)
13249 ShufMask2[i] = i + NumElems/2;
13251 SDValue OpHi = DAG.getVectorShuffle(InVT, dl, In, Undef, &ShufMask2[0]);
13253 MVT HalfVT = MVT::getVectorVT(VT.getScalarType(),
13254 VT.getVectorNumElements()/2);
13256 OpLo = DAG.getNode(X86ISD::VSEXT, dl, HalfVT, OpLo);
13257 OpHi = DAG.getNode(X86ISD::VSEXT, dl, HalfVT, OpHi);
13259 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, OpLo, OpHi);
13262 // Lower vector extended loads using a shuffle. If SSSE3 is not available we
13263 // may emit an illegal shuffle but the expansion is still better than scalar
13264 // code. We generate X86ISD::VSEXT for SEXTLOADs if it's available, otherwise
13265 // we'll emit a shuffle and a arithmetic shift.
13266 // TODO: It is possible to support ZExt by zeroing the undef values during
13267 // the shuffle phase or after the shuffle.
13268 static SDValue LowerExtendedLoad(SDValue Op, const X86Subtarget *Subtarget,
13269 SelectionDAG &DAG) {
13270 MVT RegVT = Op.getSimpleValueType();
13271 assert(RegVT.isVector() && "We only custom lower vector sext loads.");
13272 assert(RegVT.isInteger() &&
13273 "We only custom lower integer vector sext loads.");
13275 // Nothing useful we can do without SSE2 shuffles.
13276 assert(Subtarget->hasSSE2() && "We only custom lower sext loads with SSE2.");
13278 LoadSDNode *Ld = cast<LoadSDNode>(Op.getNode());
13280 EVT MemVT = Ld->getMemoryVT();
13281 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
13282 unsigned RegSz = RegVT.getSizeInBits();
13284 ISD::LoadExtType Ext = Ld->getExtensionType();
13286 assert((Ext == ISD::EXTLOAD || Ext == ISD::SEXTLOAD)
13287 && "Only anyext and sext are currently implemented.");
13288 assert(MemVT != RegVT && "Cannot extend to the same type");
13289 assert(MemVT.isVector() && "Must load a vector from memory");
13291 unsigned NumElems = RegVT.getVectorNumElements();
13292 unsigned MemSz = MemVT.getSizeInBits();
13293 assert(RegSz > MemSz && "Register size must be greater than the mem size");
13295 if (Ext == ISD::SEXTLOAD && RegSz == 256 && !Subtarget->hasInt256()) {
13296 // The only way in which we have a legal 256-bit vector result but not the
13297 // integer 256-bit operations needed to directly lower a sextload is if we
13298 // have AVX1 but not AVX2. In that case, we can always emit a sextload to
13299 // a 128-bit vector and a normal sign_extend to 256-bits that should get
13300 // correctly legalized. We do this late to allow the canonical form of
13301 // sextload to persist throughout the rest of the DAG combiner -- it wants
13302 // to fold together any extensions it can, and so will fuse a sign_extend
13303 // of an sextload into a sextload targeting a wider value.
13305 if (MemSz == 128) {
13306 // Just switch this to a normal load.
13307 assert(TLI.isTypeLegal(MemVT) && "If the memory type is a 128-bit type, "
13308 "it must be a legal 128-bit vector "
13310 Load = DAG.getLoad(MemVT, dl, Ld->getChain(), Ld->getBasePtr(),
13311 Ld->getPointerInfo(), Ld->isVolatile(), Ld->isNonTemporal(),
13312 Ld->isInvariant(), Ld->getAlignment());
13314 assert(MemSz < 128 &&
13315 "Can't extend a type wider than 128 bits to a 256 bit vector!");
13316 // Do an sext load to a 128-bit vector type. We want to use the same
13317 // number of elements, but elements half as wide. This will end up being
13318 // recursively lowered by this routine, but will succeed as we definitely
13319 // have all the necessary features if we're using AVX1.
13321 EVT::getIntegerVT(*DAG.getContext(), RegVT.getScalarSizeInBits() / 2);
13322 EVT HalfVecVT = EVT::getVectorVT(*DAG.getContext(), HalfEltVT, NumElems);
13324 DAG.getExtLoad(Ext, dl, HalfVecVT, Ld->getChain(), Ld->getBasePtr(),
13325 Ld->getPointerInfo(), MemVT, Ld->isVolatile(),
13326 Ld->isNonTemporal(), Ld->isInvariant(),
13327 Ld->getAlignment());
13330 // Replace chain users with the new chain.
13331 assert(Load->getNumValues() == 2 && "Loads must carry a chain!");
13332 DAG.ReplaceAllUsesOfValueWith(SDValue(Ld, 1), Load.getValue(1));
13334 // Finally, do a normal sign-extend to the desired register.
13335 return DAG.getSExtOrTrunc(Load, dl, RegVT);
13338 // All sizes must be a power of two.
13339 assert(isPowerOf2_32(RegSz * MemSz * NumElems) &&
13340 "Non-power-of-two elements are not custom lowered!");
13342 // Attempt to load the original value using scalar loads.
13343 // Find the largest scalar type that divides the total loaded size.
13344 MVT SclrLoadTy = MVT::i8;
13345 for (unsigned tp = MVT::FIRST_INTEGER_VALUETYPE;
13346 tp < MVT::LAST_INTEGER_VALUETYPE; ++tp) {
13347 MVT Tp = (MVT::SimpleValueType)tp;
13348 if (TLI.isTypeLegal(Tp) && ((MemSz % Tp.getSizeInBits()) == 0)) {
13353 // On 32bit systems, we can't save 64bit integers. Try bitcasting to F64.
13354 if (TLI.isTypeLegal(MVT::f64) && SclrLoadTy.getSizeInBits() < 64 &&
13356 SclrLoadTy = MVT::f64;
13358 // Calculate the number of scalar loads that we need to perform
13359 // in order to load our vector from memory.
13360 unsigned NumLoads = MemSz / SclrLoadTy.getSizeInBits();
13362 assert((Ext != ISD::SEXTLOAD || NumLoads == 1) &&
13363 "Can only lower sext loads with a single scalar load!");
13365 unsigned loadRegZize = RegSz;
13366 if (Ext == ISD::SEXTLOAD && RegSz == 256)
13369 // Represent our vector as a sequence of elements which are the
13370 // largest scalar that we can load.
13371 EVT LoadUnitVecVT = EVT::getVectorVT(
13372 *DAG.getContext(), SclrLoadTy, loadRegZize / SclrLoadTy.getSizeInBits());
13374 // Represent the data using the same element type that is stored in
13375 // memory. In practice, we ''widen'' MemVT.
13377 EVT::getVectorVT(*DAG.getContext(), MemVT.getScalarType(),
13378 loadRegZize / MemVT.getScalarType().getSizeInBits());
13380 assert(WideVecVT.getSizeInBits() == LoadUnitVecVT.getSizeInBits() &&
13381 "Invalid vector type");
13383 // We can't shuffle using an illegal type.
13384 assert(TLI.isTypeLegal(WideVecVT) &&
13385 "We only lower types that form legal widened vector types");
13387 SmallVector<SDValue, 8> Chains;
13388 SDValue Ptr = Ld->getBasePtr();
13389 SDValue Increment =
13390 DAG.getConstant(SclrLoadTy.getSizeInBits() / 8, TLI.getPointerTy());
13391 SDValue Res = DAG.getUNDEF(LoadUnitVecVT);
13393 for (unsigned i = 0; i < NumLoads; ++i) {
13394 // Perform a single load.
13395 SDValue ScalarLoad =
13396 DAG.getLoad(SclrLoadTy, dl, Ld->getChain(), Ptr, Ld->getPointerInfo(),
13397 Ld->isVolatile(), Ld->isNonTemporal(), Ld->isInvariant(),
13398 Ld->getAlignment());
13399 Chains.push_back(ScalarLoad.getValue(1));
13400 // Create the first element type using SCALAR_TO_VECTOR in order to avoid
13401 // another round of DAGCombining.
13403 Res = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, LoadUnitVecVT, ScalarLoad);
13405 Res = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, LoadUnitVecVT, Res,
13406 ScalarLoad, DAG.getIntPtrConstant(i));
13408 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr, Increment);
13411 SDValue TF = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Chains);
13413 // Bitcast the loaded value to a vector of the original element type, in
13414 // the size of the target vector type.
13415 SDValue SlicedVec = DAG.getNode(ISD::BITCAST, dl, WideVecVT, Res);
13416 unsigned SizeRatio = RegSz / MemSz;
13418 if (Ext == ISD::SEXTLOAD) {
13419 // If we have SSE4.1, we can directly emit a VSEXT node.
13420 if (Subtarget->hasSSE41()) {
13421 SDValue Sext = DAG.getNode(X86ISD::VSEXT, dl, RegVT, SlicedVec);
13422 DAG.ReplaceAllUsesOfValueWith(SDValue(Ld, 1), TF);
13426 // Otherwise we'll shuffle the small elements in the high bits of the
13427 // larger type and perform an arithmetic shift. If the shift is not legal
13428 // it's better to scalarize.
13429 assert(TLI.isOperationLegalOrCustom(ISD::SRA, RegVT) &&
13430 "We can't implement a sext load without an arithmetic right shift!");
13432 // Redistribute the loaded elements into the different locations.
13433 SmallVector<int, 16> ShuffleVec(NumElems * SizeRatio, -1);
13434 for (unsigned i = 0; i != NumElems; ++i)
13435 ShuffleVec[i * SizeRatio + SizeRatio - 1] = i;
13437 SDValue Shuff = DAG.getVectorShuffle(
13438 WideVecVT, dl, SlicedVec, DAG.getUNDEF(WideVecVT), &ShuffleVec[0]);
13440 Shuff = DAG.getNode(ISD::BITCAST, dl, RegVT, Shuff);
13442 // Build the arithmetic shift.
13443 unsigned Amt = RegVT.getVectorElementType().getSizeInBits() -
13444 MemVT.getVectorElementType().getSizeInBits();
13446 DAG.getNode(ISD::SRA, dl, RegVT, Shuff, DAG.getConstant(Amt, RegVT));
13448 DAG.ReplaceAllUsesOfValueWith(SDValue(Ld, 1), TF);
13452 // Redistribute the loaded elements into the different locations.
13453 SmallVector<int, 16> ShuffleVec(NumElems * SizeRatio, -1);
13454 for (unsigned i = 0; i != NumElems; ++i)
13455 ShuffleVec[i * SizeRatio] = i;
13457 SDValue Shuff = DAG.getVectorShuffle(WideVecVT, dl, SlicedVec,
13458 DAG.getUNDEF(WideVecVT), &ShuffleVec[0]);
13460 // Bitcast to the requested type.
13461 Shuff = DAG.getNode(ISD::BITCAST, dl, RegVT, Shuff);
13462 DAG.ReplaceAllUsesOfValueWith(SDValue(Ld, 1), TF);
13466 // isAndOrOfSingleUseSetCCs - Return true if node is an ISD::AND or
13467 // ISD::OR of two X86ISD::SETCC nodes each of which has no other use apart
13468 // from the AND / OR.
13469 static bool isAndOrOfSetCCs(SDValue Op, unsigned &Opc) {
13470 Opc = Op.getOpcode();
13471 if (Opc != ISD::OR && Opc != ISD::AND)
13473 return (Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
13474 Op.getOperand(0).hasOneUse() &&
13475 Op.getOperand(1).getOpcode() == X86ISD::SETCC &&
13476 Op.getOperand(1).hasOneUse());
13479 // isXor1OfSetCC - Return true if node is an ISD::XOR of a X86ISD::SETCC and
13480 // 1 and that the SETCC node has a single use.
13481 static bool isXor1OfSetCC(SDValue Op) {
13482 if (Op.getOpcode() != ISD::XOR)
13484 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(Op.getOperand(1));
13485 if (N1C && N1C->getAPIntValue() == 1) {
13486 return Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
13487 Op.getOperand(0).hasOneUse();
13492 SDValue X86TargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) const {
13493 bool addTest = true;
13494 SDValue Chain = Op.getOperand(0);
13495 SDValue Cond = Op.getOperand(1);
13496 SDValue Dest = Op.getOperand(2);
13499 bool Inverted = false;
13501 if (Cond.getOpcode() == ISD::SETCC) {
13502 // Check for setcc([su]{add,sub,mul}o == 0).
13503 if (cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETEQ &&
13504 isa<ConstantSDNode>(Cond.getOperand(1)) &&
13505 cast<ConstantSDNode>(Cond.getOperand(1))->isNullValue() &&
13506 Cond.getOperand(0).getResNo() == 1 &&
13507 (Cond.getOperand(0).getOpcode() == ISD::SADDO ||
13508 Cond.getOperand(0).getOpcode() == ISD::UADDO ||
13509 Cond.getOperand(0).getOpcode() == ISD::SSUBO ||
13510 Cond.getOperand(0).getOpcode() == ISD::USUBO ||
13511 Cond.getOperand(0).getOpcode() == ISD::SMULO ||
13512 Cond.getOperand(0).getOpcode() == ISD::UMULO)) {
13514 Cond = Cond.getOperand(0);
13516 SDValue NewCond = LowerSETCC(Cond, DAG);
13517 if (NewCond.getNode())
13522 // FIXME: LowerXALUO doesn't handle these!!
13523 else if (Cond.getOpcode() == X86ISD::ADD ||
13524 Cond.getOpcode() == X86ISD::SUB ||
13525 Cond.getOpcode() == X86ISD::SMUL ||
13526 Cond.getOpcode() == X86ISD::UMUL)
13527 Cond = LowerXALUO(Cond, DAG);
13530 // Look pass (and (setcc_carry (cmp ...)), 1).
13531 if (Cond.getOpcode() == ISD::AND &&
13532 Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) {
13533 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Cond.getOperand(1));
13534 if (C && C->getAPIntValue() == 1)
13535 Cond = Cond.getOperand(0);
13538 // If condition flag is set by a X86ISD::CMP, then use it as the condition
13539 // setting operand in place of the X86ISD::SETCC.
13540 unsigned CondOpcode = Cond.getOpcode();
13541 if (CondOpcode == X86ISD::SETCC ||
13542 CondOpcode == X86ISD::SETCC_CARRY) {
13543 CC = Cond.getOperand(0);
13545 SDValue Cmp = Cond.getOperand(1);
13546 unsigned Opc = Cmp.getOpcode();
13547 // FIXME: WHY THE SPECIAL CASING OF LogicalCmp??
13548 if (isX86LogicalCmp(Cmp) || Opc == X86ISD::BT) {
13552 switch (cast<ConstantSDNode>(CC)->getZExtValue()) {
13556 // These can only come from an arithmetic instruction with overflow,
13557 // e.g. SADDO, UADDO.
13558 Cond = Cond.getNode()->getOperand(1);
13564 CondOpcode = Cond.getOpcode();
13565 if (CondOpcode == ISD::UADDO || CondOpcode == ISD::SADDO ||
13566 CondOpcode == ISD::USUBO || CondOpcode == ISD::SSUBO ||
13567 ((CondOpcode == ISD::UMULO || CondOpcode == ISD::SMULO) &&
13568 Cond.getOperand(0).getValueType() != MVT::i8)) {
13569 SDValue LHS = Cond.getOperand(0);
13570 SDValue RHS = Cond.getOperand(1);
13571 unsigned X86Opcode;
13574 // Keep this in sync with LowerXALUO, otherwise we might create redundant
13575 // instructions that can't be removed afterwards (i.e. X86ISD::ADD and
13577 switch (CondOpcode) {
13578 case ISD::UADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_B; break;
13580 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS))
13582 X86Opcode = X86ISD::INC; X86Cond = X86::COND_O;
13585 X86Opcode = X86ISD::ADD; X86Cond = X86::COND_O; break;
13586 case ISD::USUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_B; break;
13588 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS))
13590 X86Opcode = X86ISD::DEC; X86Cond = X86::COND_O;
13593 X86Opcode = X86ISD::SUB; X86Cond = X86::COND_O; break;
13594 case ISD::UMULO: X86Opcode = X86ISD::UMUL; X86Cond = X86::COND_O; break;
13595 case ISD::SMULO: X86Opcode = X86ISD::SMUL; X86Cond = X86::COND_O; break;
13596 default: llvm_unreachable("unexpected overflowing operator");
13599 X86Cond = X86::GetOppositeBranchCondition((X86::CondCode)X86Cond);
13600 if (CondOpcode == ISD::UMULO)
13601 VTs = DAG.getVTList(LHS.getValueType(), LHS.getValueType(),
13604 VTs = DAG.getVTList(LHS.getValueType(), MVT::i32);
13606 SDValue X86Op = DAG.getNode(X86Opcode, dl, VTs, LHS, RHS);
13608 if (CondOpcode == ISD::UMULO)
13609 Cond = X86Op.getValue(2);
13611 Cond = X86Op.getValue(1);
13613 CC = DAG.getConstant(X86Cond, MVT::i8);
13617 if (Cond.hasOneUse() && isAndOrOfSetCCs(Cond, CondOpc)) {
13618 SDValue Cmp = Cond.getOperand(0).getOperand(1);
13619 if (CondOpc == ISD::OR) {
13620 // Also, recognize the pattern generated by an FCMP_UNE. We can emit
13621 // two branches instead of an explicit OR instruction with a
13623 if (Cmp == Cond.getOperand(1).getOperand(1) &&
13624 isX86LogicalCmp(Cmp)) {
13625 CC = Cond.getOperand(0).getOperand(0);
13626 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
13627 Chain, Dest, CC, Cmp);
13628 CC = Cond.getOperand(1).getOperand(0);
13632 } else { // ISD::AND
13633 // Also, recognize the pattern generated by an FCMP_OEQ. We can emit
13634 // two branches instead of an explicit AND instruction with a
13635 // separate test. However, we only do this if this block doesn't
13636 // have a fall-through edge, because this requires an explicit
13637 // jmp when the condition is false.
13638 if (Cmp == Cond.getOperand(1).getOperand(1) &&
13639 isX86LogicalCmp(Cmp) &&
13640 Op.getNode()->hasOneUse()) {
13641 X86::CondCode CCode =
13642 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
13643 CCode = X86::GetOppositeBranchCondition(CCode);
13644 CC = DAG.getConstant(CCode, MVT::i8);
13645 SDNode *User = *Op.getNode()->use_begin();
13646 // Look for an unconditional branch following this conditional branch.
13647 // We need this because we need to reverse the successors in order
13648 // to implement FCMP_OEQ.
13649 if (User->getOpcode() == ISD::BR) {
13650 SDValue FalseBB = User->getOperand(1);
13652 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
13653 assert(NewBR == User);
13657 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
13658 Chain, Dest, CC, Cmp);
13659 X86::CondCode CCode =
13660 (X86::CondCode)Cond.getOperand(1).getConstantOperandVal(0);
13661 CCode = X86::GetOppositeBranchCondition(CCode);
13662 CC = DAG.getConstant(CCode, MVT::i8);
13668 } else if (Cond.hasOneUse() && isXor1OfSetCC(Cond)) {
13669 // Recognize for xorb (setcc), 1 patterns. The xor inverts the condition.
13670 // It should be transformed during dag combiner except when the condition
13671 // is set by a arithmetics with overflow node.
13672 X86::CondCode CCode =
13673 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
13674 CCode = X86::GetOppositeBranchCondition(CCode);
13675 CC = DAG.getConstant(CCode, MVT::i8);
13676 Cond = Cond.getOperand(0).getOperand(1);
13678 } else if (Cond.getOpcode() == ISD::SETCC &&
13679 cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETOEQ) {
13680 // For FCMP_OEQ, we can emit
13681 // two branches instead of an explicit AND instruction with a
13682 // separate test. However, we only do this if this block doesn't
13683 // have a fall-through edge, because this requires an explicit
13684 // jmp when the condition is false.
13685 if (Op.getNode()->hasOneUse()) {
13686 SDNode *User = *Op.getNode()->use_begin();
13687 // Look for an unconditional branch following this conditional branch.
13688 // We need this because we need to reverse the successors in order
13689 // to implement FCMP_OEQ.
13690 if (User->getOpcode() == ISD::BR) {
13691 SDValue FalseBB = User->getOperand(1);
13693 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
13694 assert(NewBR == User);
13698 SDValue Cmp = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
13699 Cond.getOperand(0), Cond.getOperand(1));
13700 Cmp = ConvertCmpIfNecessary(Cmp, DAG);
13701 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
13702 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
13703 Chain, Dest, CC, Cmp);
13704 CC = DAG.getConstant(X86::COND_P, MVT::i8);
13709 } else if (Cond.getOpcode() == ISD::SETCC &&
13710 cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETUNE) {
13711 // For FCMP_UNE, we can emit
13712 // two branches instead of an explicit AND instruction with a
13713 // separate test. However, we only do this if this block doesn't
13714 // have a fall-through edge, because this requires an explicit
13715 // jmp when the condition is false.
13716 if (Op.getNode()->hasOneUse()) {
13717 SDNode *User = *Op.getNode()->use_begin();
13718 // Look for an unconditional branch following this conditional branch.
13719 // We need this because we need to reverse the successors in order
13720 // to implement FCMP_UNE.
13721 if (User->getOpcode() == ISD::BR) {
13722 SDValue FalseBB = User->getOperand(1);
13724 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
13725 assert(NewBR == User);
13728 SDValue Cmp = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
13729 Cond.getOperand(0), Cond.getOperand(1));
13730 Cmp = ConvertCmpIfNecessary(Cmp, DAG);
13731 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
13732 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
13733 Chain, Dest, CC, Cmp);
13734 CC = DAG.getConstant(X86::COND_NP, MVT::i8);
13744 // Look pass the truncate if the high bits are known zero.
13745 if (isTruncWithZeroHighBitsInput(Cond, DAG))
13746 Cond = Cond.getOperand(0);
13748 // We know the result of AND is compared against zero. Try to match
13750 if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) {
13751 SDValue NewSetCC = LowerToBT(Cond, ISD::SETNE, dl, DAG);
13752 if (NewSetCC.getNode()) {
13753 CC = NewSetCC.getOperand(0);
13754 Cond = NewSetCC.getOperand(1);
13761 X86::CondCode X86Cond = Inverted ? X86::COND_E : X86::COND_NE;
13762 CC = DAG.getConstant(X86Cond, MVT::i8);
13763 Cond = EmitTest(Cond, X86Cond, dl, DAG);
13765 Cond = ConvertCmpIfNecessary(Cond, DAG);
13766 return DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
13767 Chain, Dest, CC, Cond);
13770 // Lower dynamic stack allocation to _alloca call for Cygwin/Mingw targets.
13771 // Calls to _alloca are needed to probe the stack when allocating more than 4k
13772 // bytes in one go. Touching the stack at 4K increments is necessary to ensure
13773 // that the guard pages used by the OS virtual memory manager are allocated in
13774 // correct sequence.
13776 X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
13777 SelectionDAG &DAG) const {
13778 MachineFunction &MF = DAG.getMachineFunction();
13779 bool SplitStack = MF.shouldSplitStack();
13780 bool Lower = (Subtarget->isOSWindows() && !Subtarget->isTargetMacho()) ||
13785 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
13786 SDNode* Node = Op.getNode();
13788 unsigned SPReg = TLI.getStackPointerRegisterToSaveRestore();
13789 assert(SPReg && "Target cannot require DYNAMIC_STACKALLOC expansion and"
13790 " not tell us which reg is the stack pointer!");
13791 EVT VT = Node->getValueType(0);
13792 SDValue Tmp1 = SDValue(Node, 0);
13793 SDValue Tmp2 = SDValue(Node, 1);
13794 SDValue Tmp3 = Node->getOperand(2);
13795 SDValue Chain = Tmp1.getOperand(0);
13797 // Chain the dynamic stack allocation so that it doesn't modify the stack
13798 // pointer when other instructions are using the stack.
13799 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(0, true),
13802 SDValue Size = Tmp2.getOperand(1);
13803 SDValue SP = DAG.getCopyFromReg(Chain, dl, SPReg, VT);
13804 Chain = SP.getValue(1);
13805 unsigned Align = cast<ConstantSDNode>(Tmp3)->getZExtValue();
13806 const TargetFrameLowering &TFI = *DAG.getSubtarget().getFrameLowering();
13807 unsigned StackAlign = TFI.getStackAlignment();
13808 Tmp1 = DAG.getNode(ISD::SUB, dl, VT, SP, Size); // Value
13809 if (Align > StackAlign)
13810 Tmp1 = DAG.getNode(ISD::AND, dl, VT, Tmp1,
13811 DAG.getConstant(-(uint64_t)Align, VT));
13812 Chain = DAG.getCopyToReg(Chain, dl, SPReg, Tmp1); // Output chain
13814 Tmp2 = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(0, true),
13815 DAG.getIntPtrConstant(0, true), SDValue(),
13818 SDValue Ops[2] = { Tmp1, Tmp2 };
13819 return DAG.getMergeValues(Ops, dl);
13823 SDValue Chain = Op.getOperand(0);
13824 SDValue Size = Op.getOperand(1);
13825 unsigned Align = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue();
13826 EVT VT = Op.getNode()->getValueType(0);
13828 bool Is64Bit = Subtarget->is64Bit();
13829 EVT SPTy = Is64Bit ? MVT::i64 : MVT::i32;
13832 MachineRegisterInfo &MRI = MF.getRegInfo();
13835 // The 64 bit implementation of segmented stacks needs to clobber both r10
13836 // r11. This makes it impossible to use it along with nested parameters.
13837 const Function *F = MF.getFunction();
13839 for (Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
13841 if (I->hasNestAttr())
13842 report_fatal_error("Cannot use segmented stacks with functions that "
13843 "have nested arguments.");
13846 const TargetRegisterClass *AddrRegClass =
13847 getRegClassFor(Subtarget->is64Bit() ? MVT::i64:MVT::i32);
13848 unsigned Vreg = MRI.createVirtualRegister(AddrRegClass);
13849 Chain = DAG.getCopyToReg(Chain, dl, Vreg, Size);
13850 SDValue Value = DAG.getNode(X86ISD::SEG_ALLOCA, dl, SPTy, Chain,
13851 DAG.getRegister(Vreg, SPTy));
13852 SDValue Ops1[2] = { Value, Chain };
13853 return DAG.getMergeValues(Ops1, dl);
13856 unsigned Reg = (Subtarget->is64Bit() ? X86::RAX : X86::EAX);
13858 Chain = DAG.getCopyToReg(Chain, dl, Reg, Size, Flag);
13859 Flag = Chain.getValue(1);
13860 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
13862 Chain = DAG.getNode(X86ISD::WIN_ALLOCA, dl, NodeTys, Chain, Flag);
13864 const X86RegisterInfo *RegInfo = static_cast<const X86RegisterInfo *>(
13865 DAG.getSubtarget().getRegisterInfo());
13866 unsigned SPReg = RegInfo->getStackRegister();
13867 SDValue SP = DAG.getCopyFromReg(Chain, dl, SPReg, SPTy);
13868 Chain = SP.getValue(1);
13871 SP = DAG.getNode(ISD::AND, dl, VT, SP.getValue(0),
13872 DAG.getConstant(-(uint64_t)Align, VT));
13873 Chain = DAG.getCopyToReg(Chain, dl, SPReg, SP);
13876 SDValue Ops1[2] = { SP, Chain };
13877 return DAG.getMergeValues(Ops1, dl);
13881 SDValue X86TargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const {
13882 MachineFunction &MF = DAG.getMachineFunction();
13883 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
13885 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
13888 if (!Subtarget->is64Bit() || Subtarget->isTargetWin64()) {
13889 // vastart just stores the address of the VarArgsFrameIndex slot into the
13890 // memory location argument.
13891 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
13893 return DAG.getStore(Op.getOperand(0), DL, FR, Op.getOperand(1),
13894 MachinePointerInfo(SV), false, false, 0);
13898 // gp_offset (0 - 6 * 8)
13899 // fp_offset (48 - 48 + 8 * 16)
13900 // overflow_arg_area (point to parameters coming in memory).
13902 SmallVector<SDValue, 8> MemOps;
13903 SDValue FIN = Op.getOperand(1);
13905 SDValue Store = DAG.getStore(Op.getOperand(0), DL,
13906 DAG.getConstant(FuncInfo->getVarArgsGPOffset(),
13908 FIN, MachinePointerInfo(SV), false, false, 0);
13909 MemOps.push_back(Store);
13912 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
13913 FIN, DAG.getIntPtrConstant(4));
13914 Store = DAG.getStore(Op.getOperand(0), DL,
13915 DAG.getConstant(FuncInfo->getVarArgsFPOffset(),
13917 FIN, MachinePointerInfo(SV, 4), false, false, 0);
13918 MemOps.push_back(Store);
13920 // Store ptr to overflow_arg_area
13921 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
13922 FIN, DAG.getIntPtrConstant(4));
13923 SDValue OVFIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
13925 Store = DAG.getStore(Op.getOperand(0), DL, OVFIN, FIN,
13926 MachinePointerInfo(SV, 8),
13928 MemOps.push_back(Store);
13930 // Store ptr to reg_save_area.
13931 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
13932 FIN, DAG.getIntPtrConstant(8));
13933 SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(),
13935 Store = DAG.getStore(Op.getOperand(0), DL, RSFIN, FIN,
13936 MachinePointerInfo(SV, 16), false, false, 0);
13937 MemOps.push_back(Store);
13938 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, MemOps);
13941 SDValue X86TargetLowering::LowerVAARG(SDValue Op, SelectionDAG &DAG) const {
13942 assert(Subtarget->is64Bit() &&
13943 "LowerVAARG only handles 64-bit va_arg!");
13944 assert((Subtarget->isTargetLinux() ||
13945 Subtarget->isTargetDarwin()) &&
13946 "Unhandled target in LowerVAARG");
13947 assert(Op.getNode()->getNumOperands() == 4);
13948 SDValue Chain = Op.getOperand(0);
13949 SDValue SrcPtr = Op.getOperand(1);
13950 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
13951 unsigned Align = Op.getConstantOperandVal(3);
13954 EVT ArgVT = Op.getNode()->getValueType(0);
13955 Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
13956 uint32_t ArgSize = getDataLayout()->getTypeAllocSize(ArgTy);
13959 // Decide which area this value should be read from.
13960 // TODO: Implement the AMD64 ABI in its entirety. This simple
13961 // selection mechanism works only for the basic types.
13962 if (ArgVT == MVT::f80) {
13963 llvm_unreachable("va_arg for f80 not yet implemented");
13964 } else if (ArgVT.isFloatingPoint() && ArgSize <= 16 /*bytes*/) {
13965 ArgMode = 2; // Argument passed in XMM register. Use fp_offset.
13966 } else if (ArgVT.isInteger() && ArgSize <= 32 /*bytes*/) {
13967 ArgMode = 1; // Argument passed in GPR64 register(s). Use gp_offset.
13969 llvm_unreachable("Unhandled argument type in LowerVAARG");
13972 if (ArgMode == 2) {
13973 // Sanity Check: Make sure using fp_offset makes sense.
13974 assert(!DAG.getTarget().Options.UseSoftFloat &&
13975 !(DAG.getMachineFunction()
13976 .getFunction()->getAttributes()
13977 .hasAttribute(AttributeSet::FunctionIndex,
13978 Attribute::NoImplicitFloat)) &&
13979 Subtarget->hasSSE1());
13982 // Insert VAARG_64 node into the DAG
13983 // VAARG_64 returns two values: Variable Argument Address, Chain
13984 SmallVector<SDValue, 11> InstOps;
13985 InstOps.push_back(Chain);
13986 InstOps.push_back(SrcPtr);
13987 InstOps.push_back(DAG.getConstant(ArgSize, MVT::i32));
13988 InstOps.push_back(DAG.getConstant(ArgMode, MVT::i8));
13989 InstOps.push_back(DAG.getConstant(Align, MVT::i32));
13990 SDVTList VTs = DAG.getVTList(getPointerTy(), MVT::Other);
13991 SDValue VAARG = DAG.getMemIntrinsicNode(X86ISD::VAARG_64, dl,
13992 VTs, InstOps, MVT::i64,
13993 MachinePointerInfo(SV),
13995 /*Volatile=*/false,
13997 /*WriteMem=*/true);
13998 Chain = VAARG.getValue(1);
14000 // Load the next argument and return it
14001 return DAG.getLoad(ArgVT, dl,
14004 MachinePointerInfo(),
14005 false, false, false, 0);
14008 static SDValue LowerVACOPY(SDValue Op, const X86Subtarget *Subtarget,
14009 SelectionDAG &DAG) {
14010 // X86-64 va_list is a struct { i32, i32, i8*, i8* }.
14011 assert(Subtarget->is64Bit() && "This code only handles 64-bit va_copy!");
14012 SDValue Chain = Op.getOperand(0);
14013 SDValue DstPtr = Op.getOperand(1);
14014 SDValue SrcPtr = Op.getOperand(2);
14015 const Value *DstSV = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
14016 const Value *SrcSV = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
14019 return DAG.getMemcpy(Chain, DL, DstPtr, SrcPtr,
14020 DAG.getIntPtrConstant(24), 8, /*isVolatile*/false,
14022 MachinePointerInfo(DstSV), MachinePointerInfo(SrcSV));
14025 // getTargetVShiftByConstNode - Handle vector element shifts where the shift
14026 // amount is a constant. Takes immediate version of shift as input.
14027 static SDValue getTargetVShiftByConstNode(unsigned Opc, SDLoc dl, MVT VT,
14028 SDValue SrcOp, uint64_t ShiftAmt,
14029 SelectionDAG &DAG) {
14030 MVT ElementType = VT.getVectorElementType();
14032 // Fold this packed shift into its first operand if ShiftAmt is 0.
14036 // Check for ShiftAmt >= element width
14037 if (ShiftAmt >= ElementType.getSizeInBits()) {
14038 if (Opc == X86ISD::VSRAI)
14039 ShiftAmt = ElementType.getSizeInBits() - 1;
14041 return DAG.getConstant(0, VT);
14044 assert((Opc == X86ISD::VSHLI || Opc == X86ISD::VSRLI || Opc == X86ISD::VSRAI)
14045 && "Unknown target vector shift-by-constant node");
14047 // Fold this packed vector shift into a build vector if SrcOp is a
14048 // vector of Constants or UNDEFs, and SrcOp valuetype is the same as VT.
14049 if (VT == SrcOp.getSimpleValueType() &&
14050 ISD::isBuildVectorOfConstantSDNodes(SrcOp.getNode())) {
14051 SmallVector<SDValue, 8> Elts;
14052 unsigned NumElts = SrcOp->getNumOperands();
14053 ConstantSDNode *ND;
14056 default: llvm_unreachable(nullptr);
14057 case X86ISD::VSHLI:
14058 for (unsigned i=0; i!=NumElts; ++i) {
14059 SDValue CurrentOp = SrcOp->getOperand(i);
14060 if (CurrentOp->getOpcode() == ISD::UNDEF) {
14061 Elts.push_back(CurrentOp);
14064 ND = cast<ConstantSDNode>(CurrentOp);
14065 const APInt &C = ND->getAPIntValue();
14066 Elts.push_back(DAG.getConstant(C.shl(ShiftAmt), ElementType));
14069 case X86ISD::VSRLI:
14070 for (unsigned i=0; i!=NumElts; ++i) {
14071 SDValue CurrentOp = SrcOp->getOperand(i);
14072 if (CurrentOp->getOpcode() == ISD::UNDEF) {
14073 Elts.push_back(CurrentOp);
14076 ND = cast<ConstantSDNode>(CurrentOp);
14077 const APInt &C = ND->getAPIntValue();
14078 Elts.push_back(DAG.getConstant(C.lshr(ShiftAmt), ElementType));
14081 case X86ISD::VSRAI:
14082 for (unsigned i=0; i!=NumElts; ++i) {
14083 SDValue CurrentOp = SrcOp->getOperand(i);
14084 if (CurrentOp->getOpcode() == ISD::UNDEF) {
14085 Elts.push_back(CurrentOp);
14088 ND = cast<ConstantSDNode>(CurrentOp);
14089 const APInt &C = ND->getAPIntValue();
14090 Elts.push_back(DAG.getConstant(C.ashr(ShiftAmt), ElementType));
14095 return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, Elts);
14098 return DAG.getNode(Opc, dl, VT, SrcOp, DAG.getConstant(ShiftAmt, MVT::i8));
14101 // getTargetVShiftNode - Handle vector element shifts where the shift amount
14102 // may or may not be a constant. Takes immediate version of shift as input.
14103 static SDValue getTargetVShiftNode(unsigned Opc, SDLoc dl, MVT VT,
14104 SDValue SrcOp, SDValue ShAmt,
14105 SelectionDAG &DAG) {
14106 assert(ShAmt.getValueType() == MVT::i32 && "ShAmt is not i32");
14108 // Catch shift-by-constant.
14109 if (ConstantSDNode *CShAmt = dyn_cast<ConstantSDNode>(ShAmt))
14110 return getTargetVShiftByConstNode(Opc, dl, VT, SrcOp,
14111 CShAmt->getZExtValue(), DAG);
14113 // Change opcode to non-immediate version
14115 default: llvm_unreachable("Unknown target vector shift node");
14116 case X86ISD::VSHLI: Opc = X86ISD::VSHL; break;
14117 case X86ISD::VSRLI: Opc = X86ISD::VSRL; break;
14118 case X86ISD::VSRAI: Opc = X86ISD::VSRA; break;
14121 // Need to build a vector containing shift amount
14122 // Shift amount is 32-bits, but SSE instructions read 64-bit, so fill with 0
14125 ShOps[1] = DAG.getConstant(0, MVT::i32);
14126 ShOps[2] = ShOps[3] = DAG.getUNDEF(MVT::i32);
14127 ShAmt = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, ShOps);
14129 // The return type has to be a 128-bit type with the same element
14130 // type as the input type.
14131 MVT EltVT = VT.getVectorElementType();
14132 EVT ShVT = MVT::getVectorVT(EltVT, 128/EltVT.getSizeInBits());
14134 ShAmt = DAG.getNode(ISD::BITCAST, dl, ShVT, ShAmt);
14135 return DAG.getNode(Opc, dl, VT, SrcOp, ShAmt);
14138 static SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) {
14140 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
14142 default: return SDValue(); // Don't custom lower most intrinsics.
14143 // Comparison intrinsics.
14144 case Intrinsic::x86_sse_comieq_ss:
14145 case Intrinsic::x86_sse_comilt_ss:
14146 case Intrinsic::x86_sse_comile_ss:
14147 case Intrinsic::x86_sse_comigt_ss:
14148 case Intrinsic::x86_sse_comige_ss:
14149 case Intrinsic::x86_sse_comineq_ss:
14150 case Intrinsic::x86_sse_ucomieq_ss:
14151 case Intrinsic::x86_sse_ucomilt_ss:
14152 case Intrinsic::x86_sse_ucomile_ss:
14153 case Intrinsic::x86_sse_ucomigt_ss:
14154 case Intrinsic::x86_sse_ucomige_ss:
14155 case Intrinsic::x86_sse_ucomineq_ss:
14156 case Intrinsic::x86_sse2_comieq_sd:
14157 case Intrinsic::x86_sse2_comilt_sd:
14158 case Intrinsic::x86_sse2_comile_sd:
14159 case Intrinsic::x86_sse2_comigt_sd:
14160 case Intrinsic::x86_sse2_comige_sd:
14161 case Intrinsic::x86_sse2_comineq_sd:
14162 case Intrinsic::x86_sse2_ucomieq_sd:
14163 case Intrinsic::x86_sse2_ucomilt_sd:
14164 case Intrinsic::x86_sse2_ucomile_sd:
14165 case Intrinsic::x86_sse2_ucomigt_sd:
14166 case Intrinsic::x86_sse2_ucomige_sd:
14167 case Intrinsic::x86_sse2_ucomineq_sd: {
14171 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
14172 case Intrinsic::x86_sse_comieq_ss:
14173 case Intrinsic::x86_sse2_comieq_sd:
14174 Opc = X86ISD::COMI;
14177 case Intrinsic::x86_sse_comilt_ss:
14178 case Intrinsic::x86_sse2_comilt_sd:
14179 Opc = X86ISD::COMI;
14182 case Intrinsic::x86_sse_comile_ss:
14183 case Intrinsic::x86_sse2_comile_sd:
14184 Opc = X86ISD::COMI;
14187 case Intrinsic::x86_sse_comigt_ss:
14188 case Intrinsic::x86_sse2_comigt_sd:
14189 Opc = X86ISD::COMI;
14192 case Intrinsic::x86_sse_comige_ss:
14193 case Intrinsic::x86_sse2_comige_sd:
14194 Opc = X86ISD::COMI;
14197 case Intrinsic::x86_sse_comineq_ss:
14198 case Intrinsic::x86_sse2_comineq_sd:
14199 Opc = X86ISD::COMI;
14202 case Intrinsic::x86_sse_ucomieq_ss:
14203 case Intrinsic::x86_sse2_ucomieq_sd:
14204 Opc = X86ISD::UCOMI;
14207 case Intrinsic::x86_sse_ucomilt_ss:
14208 case Intrinsic::x86_sse2_ucomilt_sd:
14209 Opc = X86ISD::UCOMI;
14212 case Intrinsic::x86_sse_ucomile_ss:
14213 case Intrinsic::x86_sse2_ucomile_sd:
14214 Opc = X86ISD::UCOMI;
14217 case Intrinsic::x86_sse_ucomigt_ss:
14218 case Intrinsic::x86_sse2_ucomigt_sd:
14219 Opc = X86ISD::UCOMI;
14222 case Intrinsic::x86_sse_ucomige_ss:
14223 case Intrinsic::x86_sse2_ucomige_sd:
14224 Opc = X86ISD::UCOMI;
14227 case Intrinsic::x86_sse_ucomineq_ss:
14228 case Intrinsic::x86_sse2_ucomineq_sd:
14229 Opc = X86ISD::UCOMI;
14234 SDValue LHS = Op.getOperand(1);
14235 SDValue RHS = Op.getOperand(2);
14236 unsigned X86CC = TranslateX86CC(CC, true, LHS, RHS, DAG);
14237 assert(X86CC != X86::COND_INVALID && "Unexpected illegal condition!");
14238 SDValue Cond = DAG.getNode(Opc, dl, MVT::i32, LHS, RHS);
14239 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
14240 DAG.getConstant(X86CC, MVT::i8), Cond);
14241 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
14244 // Arithmetic intrinsics.
14245 case Intrinsic::x86_sse2_pmulu_dq:
14246 case Intrinsic::x86_avx2_pmulu_dq:
14247 return DAG.getNode(X86ISD::PMULUDQ, dl, Op.getValueType(),
14248 Op.getOperand(1), Op.getOperand(2));
14250 case Intrinsic::x86_sse41_pmuldq:
14251 case Intrinsic::x86_avx2_pmul_dq:
14252 return DAG.getNode(X86ISD::PMULDQ, dl, Op.getValueType(),
14253 Op.getOperand(1), Op.getOperand(2));
14255 case Intrinsic::x86_sse2_pmulhu_w:
14256 case Intrinsic::x86_avx2_pmulhu_w:
14257 return DAG.getNode(ISD::MULHU, dl, Op.getValueType(),
14258 Op.getOperand(1), Op.getOperand(2));
14260 case Intrinsic::x86_sse2_pmulh_w:
14261 case Intrinsic::x86_avx2_pmulh_w:
14262 return DAG.getNode(ISD::MULHS, dl, Op.getValueType(),
14263 Op.getOperand(1), Op.getOperand(2));
14265 // SSE2/AVX2 sub with unsigned saturation intrinsics
14266 case Intrinsic::x86_sse2_psubus_b:
14267 case Intrinsic::x86_sse2_psubus_w:
14268 case Intrinsic::x86_avx2_psubus_b:
14269 case Intrinsic::x86_avx2_psubus_w:
14270 return DAG.getNode(X86ISD::SUBUS, dl, Op.getValueType(),
14271 Op.getOperand(1), Op.getOperand(2));
14273 // SSE3/AVX horizontal add/sub intrinsics
14274 case Intrinsic::x86_sse3_hadd_ps:
14275 case Intrinsic::x86_sse3_hadd_pd:
14276 case Intrinsic::x86_avx_hadd_ps_256:
14277 case Intrinsic::x86_avx_hadd_pd_256:
14278 case Intrinsic::x86_sse3_hsub_ps:
14279 case Intrinsic::x86_sse3_hsub_pd:
14280 case Intrinsic::x86_avx_hsub_ps_256:
14281 case Intrinsic::x86_avx_hsub_pd_256:
14282 case Intrinsic::x86_ssse3_phadd_w_128:
14283 case Intrinsic::x86_ssse3_phadd_d_128:
14284 case Intrinsic::x86_avx2_phadd_w:
14285 case Intrinsic::x86_avx2_phadd_d:
14286 case Intrinsic::x86_ssse3_phsub_w_128:
14287 case Intrinsic::x86_ssse3_phsub_d_128:
14288 case Intrinsic::x86_avx2_phsub_w:
14289 case Intrinsic::x86_avx2_phsub_d: {
14292 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
14293 case Intrinsic::x86_sse3_hadd_ps:
14294 case Intrinsic::x86_sse3_hadd_pd:
14295 case Intrinsic::x86_avx_hadd_ps_256:
14296 case Intrinsic::x86_avx_hadd_pd_256:
14297 Opcode = X86ISD::FHADD;
14299 case Intrinsic::x86_sse3_hsub_ps:
14300 case Intrinsic::x86_sse3_hsub_pd:
14301 case Intrinsic::x86_avx_hsub_ps_256:
14302 case Intrinsic::x86_avx_hsub_pd_256:
14303 Opcode = X86ISD::FHSUB;
14305 case Intrinsic::x86_ssse3_phadd_w_128:
14306 case Intrinsic::x86_ssse3_phadd_d_128:
14307 case Intrinsic::x86_avx2_phadd_w:
14308 case Intrinsic::x86_avx2_phadd_d:
14309 Opcode = X86ISD::HADD;
14311 case Intrinsic::x86_ssse3_phsub_w_128:
14312 case Intrinsic::x86_ssse3_phsub_d_128:
14313 case Intrinsic::x86_avx2_phsub_w:
14314 case Intrinsic::x86_avx2_phsub_d:
14315 Opcode = X86ISD::HSUB;
14318 return DAG.getNode(Opcode, dl, Op.getValueType(),
14319 Op.getOperand(1), Op.getOperand(2));
14322 // SSE2/SSE41/AVX2 integer max/min intrinsics.
14323 case Intrinsic::x86_sse2_pmaxu_b:
14324 case Intrinsic::x86_sse41_pmaxuw:
14325 case Intrinsic::x86_sse41_pmaxud:
14326 case Intrinsic::x86_avx2_pmaxu_b:
14327 case Intrinsic::x86_avx2_pmaxu_w:
14328 case Intrinsic::x86_avx2_pmaxu_d:
14329 case Intrinsic::x86_sse2_pminu_b:
14330 case Intrinsic::x86_sse41_pminuw:
14331 case Intrinsic::x86_sse41_pminud:
14332 case Intrinsic::x86_avx2_pminu_b:
14333 case Intrinsic::x86_avx2_pminu_w:
14334 case Intrinsic::x86_avx2_pminu_d:
14335 case Intrinsic::x86_sse41_pmaxsb:
14336 case Intrinsic::x86_sse2_pmaxs_w:
14337 case Intrinsic::x86_sse41_pmaxsd:
14338 case Intrinsic::x86_avx2_pmaxs_b:
14339 case Intrinsic::x86_avx2_pmaxs_w:
14340 case Intrinsic::x86_avx2_pmaxs_d:
14341 case Intrinsic::x86_sse41_pminsb:
14342 case Intrinsic::x86_sse2_pmins_w:
14343 case Intrinsic::x86_sse41_pminsd:
14344 case Intrinsic::x86_avx2_pmins_b:
14345 case Intrinsic::x86_avx2_pmins_w:
14346 case Intrinsic::x86_avx2_pmins_d: {
14349 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
14350 case Intrinsic::x86_sse2_pmaxu_b:
14351 case Intrinsic::x86_sse41_pmaxuw:
14352 case Intrinsic::x86_sse41_pmaxud:
14353 case Intrinsic::x86_avx2_pmaxu_b:
14354 case Intrinsic::x86_avx2_pmaxu_w:
14355 case Intrinsic::x86_avx2_pmaxu_d:
14356 Opcode = X86ISD::UMAX;
14358 case Intrinsic::x86_sse2_pminu_b:
14359 case Intrinsic::x86_sse41_pminuw:
14360 case Intrinsic::x86_sse41_pminud:
14361 case Intrinsic::x86_avx2_pminu_b:
14362 case Intrinsic::x86_avx2_pminu_w:
14363 case Intrinsic::x86_avx2_pminu_d:
14364 Opcode = X86ISD::UMIN;
14366 case Intrinsic::x86_sse41_pmaxsb:
14367 case Intrinsic::x86_sse2_pmaxs_w:
14368 case Intrinsic::x86_sse41_pmaxsd:
14369 case Intrinsic::x86_avx2_pmaxs_b:
14370 case Intrinsic::x86_avx2_pmaxs_w:
14371 case Intrinsic::x86_avx2_pmaxs_d:
14372 Opcode = X86ISD::SMAX;
14374 case Intrinsic::x86_sse41_pminsb:
14375 case Intrinsic::x86_sse2_pmins_w:
14376 case Intrinsic::x86_sse41_pminsd:
14377 case Intrinsic::x86_avx2_pmins_b:
14378 case Intrinsic::x86_avx2_pmins_w:
14379 case Intrinsic::x86_avx2_pmins_d:
14380 Opcode = X86ISD::SMIN;
14383 return DAG.getNode(Opcode, dl, Op.getValueType(),
14384 Op.getOperand(1), Op.getOperand(2));
14387 // SSE/SSE2/AVX floating point max/min intrinsics.
14388 case Intrinsic::x86_sse_max_ps:
14389 case Intrinsic::x86_sse2_max_pd:
14390 case Intrinsic::x86_avx_max_ps_256:
14391 case Intrinsic::x86_avx_max_pd_256:
14392 case Intrinsic::x86_sse_min_ps:
14393 case Intrinsic::x86_sse2_min_pd:
14394 case Intrinsic::x86_avx_min_ps_256:
14395 case Intrinsic::x86_avx_min_pd_256: {
14398 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
14399 case Intrinsic::x86_sse_max_ps:
14400 case Intrinsic::x86_sse2_max_pd:
14401 case Intrinsic::x86_avx_max_ps_256:
14402 case Intrinsic::x86_avx_max_pd_256:
14403 Opcode = X86ISD::FMAX;
14405 case Intrinsic::x86_sse_min_ps:
14406 case Intrinsic::x86_sse2_min_pd:
14407 case Intrinsic::x86_avx_min_ps_256:
14408 case Intrinsic::x86_avx_min_pd_256:
14409 Opcode = X86ISD::FMIN;
14412 return DAG.getNode(Opcode, dl, Op.getValueType(),
14413 Op.getOperand(1), Op.getOperand(2));
14416 // AVX2 variable shift intrinsics
14417 case Intrinsic::x86_avx2_psllv_d:
14418 case Intrinsic::x86_avx2_psllv_q:
14419 case Intrinsic::x86_avx2_psllv_d_256:
14420 case Intrinsic::x86_avx2_psllv_q_256:
14421 case Intrinsic::x86_avx2_psrlv_d:
14422 case Intrinsic::x86_avx2_psrlv_q:
14423 case Intrinsic::x86_avx2_psrlv_d_256:
14424 case Intrinsic::x86_avx2_psrlv_q_256:
14425 case Intrinsic::x86_avx2_psrav_d:
14426 case Intrinsic::x86_avx2_psrav_d_256: {
14429 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
14430 case Intrinsic::x86_avx2_psllv_d:
14431 case Intrinsic::x86_avx2_psllv_q:
14432 case Intrinsic::x86_avx2_psllv_d_256:
14433 case Intrinsic::x86_avx2_psllv_q_256:
14436 case Intrinsic::x86_avx2_psrlv_d:
14437 case Intrinsic::x86_avx2_psrlv_q:
14438 case Intrinsic::x86_avx2_psrlv_d_256:
14439 case Intrinsic::x86_avx2_psrlv_q_256:
14442 case Intrinsic::x86_avx2_psrav_d:
14443 case Intrinsic::x86_avx2_psrav_d_256:
14447 return DAG.getNode(Opcode, dl, Op.getValueType(),
14448 Op.getOperand(1), Op.getOperand(2));
14451 case Intrinsic::x86_sse2_packssdw_128:
14452 case Intrinsic::x86_sse2_packsswb_128:
14453 case Intrinsic::x86_avx2_packssdw:
14454 case Intrinsic::x86_avx2_packsswb:
14455 return DAG.getNode(X86ISD::PACKSS, dl, Op.getValueType(),
14456 Op.getOperand(1), Op.getOperand(2));
14458 case Intrinsic::x86_sse2_packuswb_128:
14459 case Intrinsic::x86_sse41_packusdw:
14460 case Intrinsic::x86_avx2_packuswb:
14461 case Intrinsic::x86_avx2_packusdw:
14462 return DAG.getNode(X86ISD::PACKUS, dl, Op.getValueType(),
14463 Op.getOperand(1), Op.getOperand(2));
14465 case Intrinsic::x86_ssse3_pshuf_b_128:
14466 case Intrinsic::x86_avx2_pshuf_b:
14467 return DAG.getNode(X86ISD::PSHUFB, dl, Op.getValueType(),
14468 Op.getOperand(1), Op.getOperand(2));
14470 case Intrinsic::x86_sse2_pshuf_d:
14471 return DAG.getNode(X86ISD::PSHUFD, dl, Op.getValueType(),
14472 Op.getOperand(1), Op.getOperand(2));
14474 case Intrinsic::x86_sse2_pshufl_w:
14475 return DAG.getNode(X86ISD::PSHUFLW, dl, Op.getValueType(),
14476 Op.getOperand(1), Op.getOperand(2));
14478 case Intrinsic::x86_sse2_pshufh_w:
14479 return DAG.getNode(X86ISD::PSHUFHW, dl, Op.getValueType(),
14480 Op.getOperand(1), Op.getOperand(2));
14482 case Intrinsic::x86_ssse3_psign_b_128:
14483 case Intrinsic::x86_ssse3_psign_w_128:
14484 case Intrinsic::x86_ssse3_psign_d_128:
14485 case Intrinsic::x86_avx2_psign_b:
14486 case Intrinsic::x86_avx2_psign_w:
14487 case Intrinsic::x86_avx2_psign_d:
14488 return DAG.getNode(X86ISD::PSIGN, dl, Op.getValueType(),
14489 Op.getOperand(1), Op.getOperand(2));
14491 case Intrinsic::x86_sse41_insertps:
14492 return DAG.getNode(X86ISD::INSERTPS, dl, Op.getValueType(),
14493 Op.getOperand(1), Op.getOperand(2), Op.getOperand(3));
14495 case Intrinsic::x86_avx_vperm2f128_ps_256:
14496 case Intrinsic::x86_avx_vperm2f128_pd_256:
14497 case Intrinsic::x86_avx_vperm2f128_si_256:
14498 case Intrinsic::x86_avx2_vperm2i128:
14499 return DAG.getNode(X86ISD::VPERM2X128, dl, Op.getValueType(),
14500 Op.getOperand(1), Op.getOperand(2), Op.getOperand(3));
14502 case Intrinsic::x86_avx2_permd:
14503 case Intrinsic::x86_avx2_permps:
14504 // Operands intentionally swapped. Mask is last operand to intrinsic,
14505 // but second operand for node/instruction.
14506 return DAG.getNode(X86ISD::VPERMV, dl, Op.getValueType(),
14507 Op.getOperand(2), Op.getOperand(1));
14509 case Intrinsic::x86_sse_sqrt_ps:
14510 case Intrinsic::x86_sse2_sqrt_pd:
14511 case Intrinsic::x86_avx_sqrt_ps_256:
14512 case Intrinsic::x86_avx_sqrt_pd_256:
14513 return DAG.getNode(ISD::FSQRT, dl, Op.getValueType(), Op.getOperand(1));
14515 case Intrinsic::x86_avx512_mask_valign_q_512:
14516 case Intrinsic::x86_avx512_mask_valign_d_512: {
14517 EVT VT = Op.getValueType();
14518 EVT MaskVT = EVT::getVectorVT(*DAG.getContext(),
14519 MVT::i1, VT.getVectorNumElements());
14520 assert(MaskVT.isSimple() && "invalid valign mask type");
14521 // Vector source operands are swapped.
14522 return DAG.getNode(ISD::VSELECT, dl, VT,
14523 DAG.getNode(ISD::BITCAST, dl, MaskVT,
14525 DAG.getNode(X86ISD::VALIGN, dl, VT,
14526 Op.getOperand(2), Op.getOperand(1),
14531 // ptest and testp intrinsics. The intrinsic these come from are designed to
14532 // return an integer value, not just an instruction so lower it to the ptest
14533 // or testp pattern and a setcc for the result.
14534 case Intrinsic::x86_sse41_ptestz:
14535 case Intrinsic::x86_sse41_ptestc:
14536 case Intrinsic::x86_sse41_ptestnzc:
14537 case Intrinsic::x86_avx_ptestz_256:
14538 case Intrinsic::x86_avx_ptestc_256:
14539 case Intrinsic::x86_avx_ptestnzc_256:
14540 case Intrinsic::x86_avx_vtestz_ps:
14541 case Intrinsic::x86_avx_vtestc_ps:
14542 case Intrinsic::x86_avx_vtestnzc_ps:
14543 case Intrinsic::x86_avx_vtestz_pd:
14544 case Intrinsic::x86_avx_vtestc_pd:
14545 case Intrinsic::x86_avx_vtestnzc_pd:
14546 case Intrinsic::x86_avx_vtestz_ps_256:
14547 case Intrinsic::x86_avx_vtestc_ps_256:
14548 case Intrinsic::x86_avx_vtestnzc_ps_256:
14549 case Intrinsic::x86_avx_vtestz_pd_256:
14550 case Intrinsic::x86_avx_vtestc_pd_256:
14551 case Intrinsic::x86_avx_vtestnzc_pd_256: {
14552 bool IsTestPacked = false;
14555 default: llvm_unreachable("Bad fallthrough in Intrinsic lowering.");
14556 case Intrinsic::x86_avx_vtestz_ps:
14557 case Intrinsic::x86_avx_vtestz_pd:
14558 case Intrinsic::x86_avx_vtestz_ps_256:
14559 case Intrinsic::x86_avx_vtestz_pd_256:
14560 IsTestPacked = true; // Fallthrough
14561 case Intrinsic::x86_sse41_ptestz:
14562 case Intrinsic::x86_avx_ptestz_256:
14564 X86CC = X86::COND_E;
14566 case Intrinsic::x86_avx_vtestc_ps:
14567 case Intrinsic::x86_avx_vtestc_pd:
14568 case Intrinsic::x86_avx_vtestc_ps_256:
14569 case Intrinsic::x86_avx_vtestc_pd_256:
14570 IsTestPacked = true; // Fallthrough
14571 case Intrinsic::x86_sse41_ptestc:
14572 case Intrinsic::x86_avx_ptestc_256:
14574 X86CC = X86::COND_B;
14576 case Intrinsic::x86_avx_vtestnzc_ps:
14577 case Intrinsic::x86_avx_vtestnzc_pd:
14578 case Intrinsic::x86_avx_vtestnzc_ps_256:
14579 case Intrinsic::x86_avx_vtestnzc_pd_256:
14580 IsTestPacked = true; // Fallthrough
14581 case Intrinsic::x86_sse41_ptestnzc:
14582 case Intrinsic::x86_avx_ptestnzc_256:
14584 X86CC = X86::COND_A;
14588 SDValue LHS = Op.getOperand(1);
14589 SDValue RHS = Op.getOperand(2);
14590 unsigned TestOpc = IsTestPacked ? X86ISD::TESTP : X86ISD::PTEST;
14591 SDValue Test = DAG.getNode(TestOpc, dl, MVT::i32, LHS, RHS);
14592 SDValue CC = DAG.getConstant(X86CC, MVT::i8);
14593 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8, CC, Test);
14594 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
14596 case Intrinsic::x86_avx512_kortestz_w:
14597 case Intrinsic::x86_avx512_kortestc_w: {
14598 unsigned X86CC = (IntNo == Intrinsic::x86_avx512_kortestz_w)? X86::COND_E: X86::COND_B;
14599 SDValue LHS = DAG.getNode(ISD::BITCAST, dl, MVT::v16i1, Op.getOperand(1));
14600 SDValue RHS = DAG.getNode(ISD::BITCAST, dl, MVT::v16i1, Op.getOperand(2));
14601 SDValue CC = DAG.getConstant(X86CC, MVT::i8);
14602 SDValue Test = DAG.getNode(X86ISD::KORTEST, dl, MVT::i32, LHS, RHS);
14603 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i1, CC, Test);
14604 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
14607 // SSE/AVX shift intrinsics
14608 case Intrinsic::x86_sse2_psll_w:
14609 case Intrinsic::x86_sse2_psll_d:
14610 case Intrinsic::x86_sse2_psll_q:
14611 case Intrinsic::x86_avx2_psll_w:
14612 case Intrinsic::x86_avx2_psll_d:
14613 case Intrinsic::x86_avx2_psll_q:
14614 case Intrinsic::x86_sse2_psrl_w:
14615 case Intrinsic::x86_sse2_psrl_d:
14616 case Intrinsic::x86_sse2_psrl_q:
14617 case Intrinsic::x86_avx2_psrl_w:
14618 case Intrinsic::x86_avx2_psrl_d:
14619 case Intrinsic::x86_avx2_psrl_q:
14620 case Intrinsic::x86_sse2_psra_w:
14621 case Intrinsic::x86_sse2_psra_d:
14622 case Intrinsic::x86_avx2_psra_w:
14623 case Intrinsic::x86_avx2_psra_d: {
14626 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
14627 case Intrinsic::x86_sse2_psll_w:
14628 case Intrinsic::x86_sse2_psll_d:
14629 case Intrinsic::x86_sse2_psll_q:
14630 case Intrinsic::x86_avx2_psll_w:
14631 case Intrinsic::x86_avx2_psll_d:
14632 case Intrinsic::x86_avx2_psll_q:
14633 Opcode = X86ISD::VSHL;
14635 case Intrinsic::x86_sse2_psrl_w:
14636 case Intrinsic::x86_sse2_psrl_d:
14637 case Intrinsic::x86_sse2_psrl_q:
14638 case Intrinsic::x86_avx2_psrl_w:
14639 case Intrinsic::x86_avx2_psrl_d:
14640 case Intrinsic::x86_avx2_psrl_q:
14641 Opcode = X86ISD::VSRL;
14643 case Intrinsic::x86_sse2_psra_w:
14644 case Intrinsic::x86_sse2_psra_d:
14645 case Intrinsic::x86_avx2_psra_w:
14646 case Intrinsic::x86_avx2_psra_d:
14647 Opcode = X86ISD::VSRA;
14650 return DAG.getNode(Opcode, dl, Op.getValueType(),
14651 Op.getOperand(1), Op.getOperand(2));
14654 // SSE/AVX immediate shift intrinsics
14655 case Intrinsic::x86_sse2_pslli_w:
14656 case Intrinsic::x86_sse2_pslli_d:
14657 case Intrinsic::x86_sse2_pslli_q:
14658 case Intrinsic::x86_avx2_pslli_w:
14659 case Intrinsic::x86_avx2_pslli_d:
14660 case Intrinsic::x86_avx2_pslli_q:
14661 case Intrinsic::x86_sse2_psrli_w:
14662 case Intrinsic::x86_sse2_psrli_d:
14663 case Intrinsic::x86_sse2_psrli_q:
14664 case Intrinsic::x86_avx2_psrli_w:
14665 case Intrinsic::x86_avx2_psrli_d:
14666 case Intrinsic::x86_avx2_psrli_q:
14667 case Intrinsic::x86_sse2_psrai_w:
14668 case Intrinsic::x86_sse2_psrai_d:
14669 case Intrinsic::x86_avx2_psrai_w:
14670 case Intrinsic::x86_avx2_psrai_d: {
14673 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
14674 case Intrinsic::x86_sse2_pslli_w:
14675 case Intrinsic::x86_sse2_pslli_d:
14676 case Intrinsic::x86_sse2_pslli_q:
14677 case Intrinsic::x86_avx2_pslli_w:
14678 case Intrinsic::x86_avx2_pslli_d:
14679 case Intrinsic::x86_avx2_pslli_q:
14680 Opcode = X86ISD::VSHLI;
14682 case Intrinsic::x86_sse2_psrli_w:
14683 case Intrinsic::x86_sse2_psrli_d:
14684 case Intrinsic::x86_sse2_psrli_q:
14685 case Intrinsic::x86_avx2_psrli_w:
14686 case Intrinsic::x86_avx2_psrli_d:
14687 case Intrinsic::x86_avx2_psrli_q:
14688 Opcode = X86ISD::VSRLI;
14690 case Intrinsic::x86_sse2_psrai_w:
14691 case Intrinsic::x86_sse2_psrai_d:
14692 case Intrinsic::x86_avx2_psrai_w:
14693 case Intrinsic::x86_avx2_psrai_d:
14694 Opcode = X86ISD::VSRAI;
14697 return getTargetVShiftNode(Opcode, dl, Op.getSimpleValueType(),
14698 Op.getOperand(1), Op.getOperand(2), DAG);
14701 case Intrinsic::x86_sse42_pcmpistria128:
14702 case Intrinsic::x86_sse42_pcmpestria128:
14703 case Intrinsic::x86_sse42_pcmpistric128:
14704 case Intrinsic::x86_sse42_pcmpestric128:
14705 case Intrinsic::x86_sse42_pcmpistrio128:
14706 case Intrinsic::x86_sse42_pcmpestrio128:
14707 case Intrinsic::x86_sse42_pcmpistris128:
14708 case Intrinsic::x86_sse42_pcmpestris128:
14709 case Intrinsic::x86_sse42_pcmpistriz128:
14710 case Intrinsic::x86_sse42_pcmpestriz128: {
14714 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
14715 case Intrinsic::x86_sse42_pcmpistria128:
14716 Opcode = X86ISD::PCMPISTRI;
14717 X86CC = X86::COND_A;
14719 case Intrinsic::x86_sse42_pcmpestria128:
14720 Opcode = X86ISD::PCMPESTRI;
14721 X86CC = X86::COND_A;
14723 case Intrinsic::x86_sse42_pcmpistric128:
14724 Opcode = X86ISD::PCMPISTRI;
14725 X86CC = X86::COND_B;
14727 case Intrinsic::x86_sse42_pcmpestric128:
14728 Opcode = X86ISD::PCMPESTRI;
14729 X86CC = X86::COND_B;
14731 case Intrinsic::x86_sse42_pcmpistrio128:
14732 Opcode = X86ISD::PCMPISTRI;
14733 X86CC = X86::COND_O;
14735 case Intrinsic::x86_sse42_pcmpestrio128:
14736 Opcode = X86ISD::PCMPESTRI;
14737 X86CC = X86::COND_O;
14739 case Intrinsic::x86_sse42_pcmpistris128:
14740 Opcode = X86ISD::PCMPISTRI;
14741 X86CC = X86::COND_S;
14743 case Intrinsic::x86_sse42_pcmpestris128:
14744 Opcode = X86ISD::PCMPESTRI;
14745 X86CC = X86::COND_S;
14747 case Intrinsic::x86_sse42_pcmpistriz128:
14748 Opcode = X86ISD::PCMPISTRI;
14749 X86CC = X86::COND_E;
14751 case Intrinsic::x86_sse42_pcmpestriz128:
14752 Opcode = X86ISD::PCMPESTRI;
14753 X86CC = X86::COND_E;
14756 SmallVector<SDValue, 5> NewOps(Op->op_begin()+1, Op->op_end());
14757 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32);
14758 SDValue PCMP = DAG.getNode(Opcode, dl, VTs, NewOps);
14759 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
14760 DAG.getConstant(X86CC, MVT::i8),
14761 SDValue(PCMP.getNode(), 1));
14762 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
14765 case Intrinsic::x86_sse42_pcmpistri128:
14766 case Intrinsic::x86_sse42_pcmpestri128: {
14768 if (IntNo == Intrinsic::x86_sse42_pcmpistri128)
14769 Opcode = X86ISD::PCMPISTRI;
14771 Opcode = X86ISD::PCMPESTRI;
14773 SmallVector<SDValue, 5> NewOps(Op->op_begin()+1, Op->op_end());
14774 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32);
14775 return DAG.getNode(Opcode, dl, VTs, NewOps);
14777 case Intrinsic::x86_fma_vfmadd_ps:
14778 case Intrinsic::x86_fma_vfmadd_pd:
14779 case Intrinsic::x86_fma_vfmsub_ps:
14780 case Intrinsic::x86_fma_vfmsub_pd:
14781 case Intrinsic::x86_fma_vfnmadd_ps:
14782 case Intrinsic::x86_fma_vfnmadd_pd:
14783 case Intrinsic::x86_fma_vfnmsub_ps:
14784 case Intrinsic::x86_fma_vfnmsub_pd:
14785 case Intrinsic::x86_fma_vfmaddsub_ps:
14786 case Intrinsic::x86_fma_vfmaddsub_pd:
14787 case Intrinsic::x86_fma_vfmsubadd_ps:
14788 case Intrinsic::x86_fma_vfmsubadd_pd:
14789 case Intrinsic::x86_fma_vfmadd_ps_256:
14790 case Intrinsic::x86_fma_vfmadd_pd_256:
14791 case Intrinsic::x86_fma_vfmsub_ps_256:
14792 case Intrinsic::x86_fma_vfmsub_pd_256:
14793 case Intrinsic::x86_fma_vfnmadd_ps_256:
14794 case Intrinsic::x86_fma_vfnmadd_pd_256:
14795 case Intrinsic::x86_fma_vfnmsub_ps_256:
14796 case Intrinsic::x86_fma_vfnmsub_pd_256:
14797 case Intrinsic::x86_fma_vfmaddsub_ps_256:
14798 case Intrinsic::x86_fma_vfmaddsub_pd_256:
14799 case Intrinsic::x86_fma_vfmsubadd_ps_256:
14800 case Intrinsic::x86_fma_vfmsubadd_pd_256:
14801 case Intrinsic::x86_fma_vfmadd_ps_512:
14802 case Intrinsic::x86_fma_vfmadd_pd_512:
14803 case Intrinsic::x86_fma_vfmsub_ps_512:
14804 case Intrinsic::x86_fma_vfmsub_pd_512:
14805 case Intrinsic::x86_fma_vfnmadd_ps_512:
14806 case Intrinsic::x86_fma_vfnmadd_pd_512:
14807 case Intrinsic::x86_fma_vfnmsub_ps_512:
14808 case Intrinsic::x86_fma_vfnmsub_pd_512:
14809 case Intrinsic::x86_fma_vfmaddsub_ps_512:
14810 case Intrinsic::x86_fma_vfmaddsub_pd_512:
14811 case Intrinsic::x86_fma_vfmsubadd_ps_512:
14812 case Intrinsic::x86_fma_vfmsubadd_pd_512: {
14815 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
14816 case Intrinsic::x86_fma_vfmadd_ps:
14817 case Intrinsic::x86_fma_vfmadd_pd:
14818 case Intrinsic::x86_fma_vfmadd_ps_256:
14819 case Intrinsic::x86_fma_vfmadd_pd_256:
14820 case Intrinsic::x86_fma_vfmadd_ps_512:
14821 case Intrinsic::x86_fma_vfmadd_pd_512:
14822 Opc = X86ISD::FMADD;
14824 case Intrinsic::x86_fma_vfmsub_ps:
14825 case Intrinsic::x86_fma_vfmsub_pd:
14826 case Intrinsic::x86_fma_vfmsub_ps_256:
14827 case Intrinsic::x86_fma_vfmsub_pd_256:
14828 case Intrinsic::x86_fma_vfmsub_ps_512:
14829 case Intrinsic::x86_fma_vfmsub_pd_512:
14830 Opc = X86ISD::FMSUB;
14832 case Intrinsic::x86_fma_vfnmadd_ps:
14833 case Intrinsic::x86_fma_vfnmadd_pd:
14834 case Intrinsic::x86_fma_vfnmadd_ps_256:
14835 case Intrinsic::x86_fma_vfnmadd_pd_256:
14836 case Intrinsic::x86_fma_vfnmadd_ps_512:
14837 case Intrinsic::x86_fma_vfnmadd_pd_512:
14838 Opc = X86ISD::FNMADD;
14840 case Intrinsic::x86_fma_vfnmsub_ps:
14841 case Intrinsic::x86_fma_vfnmsub_pd:
14842 case Intrinsic::x86_fma_vfnmsub_ps_256:
14843 case Intrinsic::x86_fma_vfnmsub_pd_256:
14844 case Intrinsic::x86_fma_vfnmsub_ps_512:
14845 case Intrinsic::x86_fma_vfnmsub_pd_512:
14846 Opc = X86ISD::FNMSUB;
14848 case Intrinsic::x86_fma_vfmaddsub_ps:
14849 case Intrinsic::x86_fma_vfmaddsub_pd:
14850 case Intrinsic::x86_fma_vfmaddsub_ps_256:
14851 case Intrinsic::x86_fma_vfmaddsub_pd_256:
14852 case Intrinsic::x86_fma_vfmaddsub_ps_512:
14853 case Intrinsic::x86_fma_vfmaddsub_pd_512:
14854 Opc = X86ISD::FMADDSUB;
14856 case Intrinsic::x86_fma_vfmsubadd_ps:
14857 case Intrinsic::x86_fma_vfmsubadd_pd:
14858 case Intrinsic::x86_fma_vfmsubadd_ps_256:
14859 case Intrinsic::x86_fma_vfmsubadd_pd_256:
14860 case Intrinsic::x86_fma_vfmsubadd_ps_512:
14861 case Intrinsic::x86_fma_vfmsubadd_pd_512:
14862 Opc = X86ISD::FMSUBADD;
14866 return DAG.getNode(Opc, dl, Op.getValueType(), Op.getOperand(1),
14867 Op.getOperand(2), Op.getOperand(3));
14872 static SDValue getGatherNode(unsigned Opc, SDValue Op, SelectionDAG &DAG,
14873 SDValue Src, SDValue Mask, SDValue Base,
14874 SDValue Index, SDValue ScaleOp, SDValue Chain,
14875 const X86Subtarget * Subtarget) {
14877 ConstantSDNode *C = dyn_cast<ConstantSDNode>(ScaleOp);
14878 assert(C && "Invalid scale type");
14879 SDValue Scale = DAG.getTargetConstant(C->getZExtValue(), MVT::i8);
14880 EVT MaskVT = MVT::getVectorVT(MVT::i1,
14881 Index.getSimpleValueType().getVectorNumElements());
14883 ConstantSDNode *MaskC = dyn_cast<ConstantSDNode>(Mask);
14885 MaskInReg = DAG.getTargetConstant(MaskC->getSExtValue(), MaskVT);
14887 MaskInReg = DAG.getNode(ISD::BITCAST, dl, MaskVT, Mask);
14888 SDVTList VTs = DAG.getVTList(Op.getValueType(), MaskVT, MVT::Other);
14889 SDValue Disp = DAG.getTargetConstant(0, MVT::i32);
14890 SDValue Segment = DAG.getRegister(0, MVT::i32);
14891 if (Src.getOpcode() == ISD::UNDEF)
14892 Src = getZeroVector(Op.getValueType(), Subtarget, DAG, dl);
14893 SDValue Ops[] = {Src, MaskInReg, Base, Scale, Index, Disp, Segment, Chain};
14894 SDNode *Res = DAG.getMachineNode(Opc, dl, VTs, Ops);
14895 SDValue RetOps[] = { SDValue(Res, 0), SDValue(Res, 2) };
14896 return DAG.getMergeValues(RetOps, dl);
14899 static SDValue getScatterNode(unsigned Opc, SDValue Op, SelectionDAG &DAG,
14900 SDValue Src, SDValue Mask, SDValue Base,
14901 SDValue Index, SDValue ScaleOp, SDValue Chain) {
14903 ConstantSDNode *C = dyn_cast<ConstantSDNode>(ScaleOp);
14904 assert(C && "Invalid scale type");
14905 SDValue Scale = DAG.getTargetConstant(C->getZExtValue(), MVT::i8);
14906 SDValue Disp = DAG.getTargetConstant(0, MVT::i32);
14907 SDValue Segment = DAG.getRegister(0, MVT::i32);
14908 EVT MaskVT = MVT::getVectorVT(MVT::i1,
14909 Index.getSimpleValueType().getVectorNumElements());
14911 ConstantSDNode *MaskC = dyn_cast<ConstantSDNode>(Mask);
14913 MaskInReg = DAG.getTargetConstant(MaskC->getSExtValue(), MaskVT);
14915 MaskInReg = DAG.getNode(ISD::BITCAST, dl, MaskVT, Mask);
14916 SDVTList VTs = DAG.getVTList(MaskVT, MVT::Other);
14917 SDValue Ops[] = {Base, Scale, Index, Disp, Segment, MaskInReg, Src, Chain};
14918 SDNode *Res = DAG.getMachineNode(Opc, dl, VTs, Ops);
14919 return SDValue(Res, 1);
14922 static SDValue getPrefetchNode(unsigned Opc, SDValue Op, SelectionDAG &DAG,
14923 SDValue Mask, SDValue Base, SDValue Index,
14924 SDValue ScaleOp, SDValue Chain) {
14926 ConstantSDNode *C = dyn_cast<ConstantSDNode>(ScaleOp);
14927 assert(C && "Invalid scale type");
14928 SDValue Scale = DAG.getTargetConstant(C->getZExtValue(), MVT::i8);
14929 SDValue Disp = DAG.getTargetConstant(0, MVT::i32);
14930 SDValue Segment = DAG.getRegister(0, MVT::i32);
14932 MVT::getVectorVT(MVT::i1, Index.getSimpleValueType().getVectorNumElements());
14934 ConstantSDNode *MaskC = dyn_cast<ConstantSDNode>(Mask);
14936 MaskInReg = DAG.getTargetConstant(MaskC->getSExtValue(), MaskVT);
14938 MaskInReg = DAG.getNode(ISD::BITCAST, dl, MaskVT, Mask);
14939 //SDVTList VTs = DAG.getVTList(MVT::Other);
14940 SDValue Ops[] = {MaskInReg, Base, Scale, Index, Disp, Segment, Chain};
14941 SDNode *Res = DAG.getMachineNode(Opc, dl, MVT::Other, Ops);
14942 return SDValue(Res, 0);
14945 // getReadPerformanceCounter - Handles the lowering of builtin intrinsics that
14946 // read performance monitor counters (x86_rdpmc).
14947 static void getReadPerformanceCounter(SDNode *N, SDLoc DL,
14948 SelectionDAG &DAG, const X86Subtarget *Subtarget,
14949 SmallVectorImpl<SDValue> &Results) {
14950 assert(N->getNumOperands() == 3 && "Unexpected number of operands!");
14951 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
14954 // The ECX register is used to select the index of the performance counter
14956 SDValue Chain = DAG.getCopyToReg(N->getOperand(0), DL, X86::ECX,
14958 SDValue rd = DAG.getNode(X86ISD::RDPMC_DAG, DL, Tys, Chain);
14960 // Reads the content of a 64-bit performance counter and returns it in the
14961 // registers EDX:EAX.
14962 if (Subtarget->is64Bit()) {
14963 LO = DAG.getCopyFromReg(rd, DL, X86::RAX, MVT::i64, rd.getValue(1));
14964 HI = DAG.getCopyFromReg(LO.getValue(1), DL, X86::RDX, MVT::i64,
14967 LO = DAG.getCopyFromReg(rd, DL, X86::EAX, MVT::i32, rd.getValue(1));
14968 HI = DAG.getCopyFromReg(LO.getValue(1), DL, X86::EDX, MVT::i32,
14971 Chain = HI.getValue(1);
14973 if (Subtarget->is64Bit()) {
14974 // The EAX register is loaded with the low-order 32 bits. The EDX register
14975 // is loaded with the supported high-order bits of the counter.
14976 SDValue Tmp = DAG.getNode(ISD::SHL, DL, MVT::i64, HI,
14977 DAG.getConstant(32, MVT::i8));
14978 Results.push_back(DAG.getNode(ISD::OR, DL, MVT::i64, LO, Tmp));
14979 Results.push_back(Chain);
14983 // Use a buildpair to merge the two 32-bit values into a 64-bit one.
14984 SDValue Ops[] = { LO, HI };
14985 SDValue Pair = DAG.getNode(ISD::BUILD_PAIR, DL, MVT::i64, Ops);
14986 Results.push_back(Pair);
14987 Results.push_back(Chain);
14990 // getReadTimeStampCounter - Handles the lowering of builtin intrinsics that
14991 // read the time stamp counter (x86_rdtsc and x86_rdtscp). This function is
14992 // also used to custom lower READCYCLECOUNTER nodes.
14993 static void getReadTimeStampCounter(SDNode *N, SDLoc DL, unsigned Opcode,
14994 SelectionDAG &DAG, const X86Subtarget *Subtarget,
14995 SmallVectorImpl<SDValue> &Results) {
14996 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
14997 SDValue rd = DAG.getNode(Opcode, DL, Tys, N->getOperand(0));
15000 // The processor's time-stamp counter (a 64-bit MSR) is stored into the
15001 // EDX:EAX registers. EDX is loaded with the high-order 32 bits of the MSR
15002 // and the EAX register is loaded with the low-order 32 bits.
15003 if (Subtarget->is64Bit()) {
15004 LO = DAG.getCopyFromReg(rd, DL, X86::RAX, MVT::i64, rd.getValue(1));
15005 HI = DAG.getCopyFromReg(LO.getValue(1), DL, X86::RDX, MVT::i64,
15008 LO = DAG.getCopyFromReg(rd, DL, X86::EAX, MVT::i32, rd.getValue(1));
15009 HI = DAG.getCopyFromReg(LO.getValue(1), DL, X86::EDX, MVT::i32,
15012 SDValue Chain = HI.getValue(1);
15014 if (Opcode == X86ISD::RDTSCP_DAG) {
15015 assert(N->getNumOperands() == 3 && "Unexpected number of operands!");
15017 // Instruction RDTSCP loads the IA32:TSC_AUX_MSR (address C000_0103H) into
15018 // the ECX register. Add 'ecx' explicitly to the chain.
15019 SDValue ecx = DAG.getCopyFromReg(Chain, DL, X86::ECX, MVT::i32,
15021 // Explicitly store the content of ECX at the location passed in input
15022 // to the 'rdtscp' intrinsic.
15023 Chain = DAG.getStore(ecx.getValue(1), DL, ecx, N->getOperand(2),
15024 MachinePointerInfo(), false, false, 0);
15027 if (Subtarget->is64Bit()) {
15028 // The EDX register is loaded with the high-order 32 bits of the MSR, and
15029 // the EAX register is loaded with the low-order 32 bits.
15030 SDValue Tmp = DAG.getNode(ISD::SHL, DL, MVT::i64, HI,
15031 DAG.getConstant(32, MVT::i8));
15032 Results.push_back(DAG.getNode(ISD::OR, DL, MVT::i64, LO, Tmp));
15033 Results.push_back(Chain);
15037 // Use a buildpair to merge the two 32-bit values into a 64-bit one.
15038 SDValue Ops[] = { LO, HI };
15039 SDValue Pair = DAG.getNode(ISD::BUILD_PAIR, DL, MVT::i64, Ops);
15040 Results.push_back(Pair);
15041 Results.push_back(Chain);
15044 static SDValue LowerREADCYCLECOUNTER(SDValue Op, const X86Subtarget *Subtarget,
15045 SelectionDAG &DAG) {
15046 SmallVector<SDValue, 2> Results;
15048 getReadTimeStampCounter(Op.getNode(), DL, X86ISD::RDTSC_DAG, DAG, Subtarget,
15050 return DAG.getMergeValues(Results, DL);
15053 enum IntrinsicType {
15054 GATHER, SCATTER, PREFETCH, RDSEED, RDRAND, RDPMC, RDTSC, XTEST
15057 struct IntrinsicData {
15058 IntrinsicData(IntrinsicType IType, unsigned IOpc0, unsigned IOpc1)
15059 :Type(IType), Opc0(IOpc0), Opc1(IOpc1) {}
15060 IntrinsicType Type;
15065 std::map < unsigned, IntrinsicData> IntrMap;
15066 static void InitIntinsicsMap() {
15067 static bool Initialized = false;
15070 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_gather_qps_512,
15071 IntrinsicData(GATHER, X86::VGATHERQPSZrm, 0)));
15072 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_gather_qps_512,
15073 IntrinsicData(GATHER, X86::VGATHERQPSZrm, 0)));
15074 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_gather_qpd_512,
15075 IntrinsicData(GATHER, X86::VGATHERQPDZrm, 0)));
15076 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_gather_dpd_512,
15077 IntrinsicData(GATHER, X86::VGATHERDPDZrm, 0)));
15078 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_gather_dps_512,
15079 IntrinsicData(GATHER, X86::VGATHERDPSZrm, 0)));
15080 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_gather_qpi_512,
15081 IntrinsicData(GATHER, X86::VPGATHERQDZrm, 0)));
15082 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_gather_qpq_512,
15083 IntrinsicData(GATHER, X86::VPGATHERQQZrm, 0)));
15084 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_gather_dpi_512,
15085 IntrinsicData(GATHER, X86::VPGATHERDDZrm, 0)));
15086 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_gather_dpq_512,
15087 IntrinsicData(GATHER, X86::VPGATHERDQZrm, 0)));
15089 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_scatter_qps_512,
15090 IntrinsicData(SCATTER, X86::VSCATTERQPSZmr, 0)));
15091 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_scatter_qpd_512,
15092 IntrinsicData(SCATTER, X86::VSCATTERQPDZmr, 0)));
15093 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_scatter_dpd_512,
15094 IntrinsicData(SCATTER, X86::VSCATTERDPDZmr, 0)));
15095 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_scatter_dps_512,
15096 IntrinsicData(SCATTER, X86::VSCATTERDPSZmr, 0)));
15097 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_scatter_qpi_512,
15098 IntrinsicData(SCATTER, X86::VPSCATTERQDZmr, 0)));
15099 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_scatter_qpq_512,
15100 IntrinsicData(SCATTER, X86::VPSCATTERQQZmr, 0)));
15101 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_scatter_dpi_512,
15102 IntrinsicData(SCATTER, X86::VPSCATTERDDZmr, 0)));
15103 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_scatter_dpq_512,
15104 IntrinsicData(SCATTER, X86::VPSCATTERDQZmr, 0)));
15106 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_gatherpf_qps_512,
15107 IntrinsicData(PREFETCH, X86::VGATHERPF0QPSm,
15108 X86::VGATHERPF1QPSm)));
15109 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_gatherpf_qpd_512,
15110 IntrinsicData(PREFETCH, X86::VGATHERPF0QPDm,
15111 X86::VGATHERPF1QPDm)));
15112 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_gatherpf_dpd_512,
15113 IntrinsicData(PREFETCH, X86::VGATHERPF0DPDm,
15114 X86::VGATHERPF1DPDm)));
15115 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_gatherpf_dps_512,
15116 IntrinsicData(PREFETCH, X86::VGATHERPF0DPSm,
15117 X86::VGATHERPF1DPSm)));
15118 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_scatterpf_qps_512,
15119 IntrinsicData(PREFETCH, X86::VSCATTERPF0QPSm,
15120 X86::VSCATTERPF1QPSm)));
15121 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_scatterpf_qpd_512,
15122 IntrinsicData(PREFETCH, X86::VSCATTERPF0QPDm,
15123 X86::VSCATTERPF1QPDm)));
15124 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_scatterpf_dpd_512,
15125 IntrinsicData(PREFETCH, X86::VSCATTERPF0DPDm,
15126 X86::VSCATTERPF1DPDm)));
15127 IntrMap.insert(std::make_pair(Intrinsic::x86_avx512_scatterpf_dps_512,
15128 IntrinsicData(PREFETCH, X86::VSCATTERPF0DPSm,
15129 X86::VSCATTERPF1DPSm)));
15130 IntrMap.insert(std::make_pair(Intrinsic::x86_rdrand_16,
15131 IntrinsicData(RDRAND, X86ISD::RDRAND, 0)));
15132 IntrMap.insert(std::make_pair(Intrinsic::x86_rdrand_32,
15133 IntrinsicData(RDRAND, X86ISD::RDRAND, 0)));
15134 IntrMap.insert(std::make_pair(Intrinsic::x86_rdrand_64,
15135 IntrinsicData(RDRAND, X86ISD::RDRAND, 0)));
15136 IntrMap.insert(std::make_pair(Intrinsic::x86_rdseed_16,
15137 IntrinsicData(RDSEED, X86ISD::RDSEED, 0)));
15138 IntrMap.insert(std::make_pair(Intrinsic::x86_rdseed_32,
15139 IntrinsicData(RDSEED, X86ISD::RDSEED, 0)));
15140 IntrMap.insert(std::make_pair(Intrinsic::x86_rdseed_64,
15141 IntrinsicData(RDSEED, X86ISD::RDSEED, 0)));
15142 IntrMap.insert(std::make_pair(Intrinsic::x86_xtest,
15143 IntrinsicData(XTEST, X86ISD::XTEST, 0)));
15144 IntrMap.insert(std::make_pair(Intrinsic::x86_rdtsc,
15145 IntrinsicData(RDTSC, X86ISD::RDTSC_DAG, 0)));
15146 IntrMap.insert(std::make_pair(Intrinsic::x86_rdtscp,
15147 IntrinsicData(RDTSC, X86ISD::RDTSCP_DAG, 0)));
15148 IntrMap.insert(std::make_pair(Intrinsic::x86_rdpmc,
15149 IntrinsicData(RDPMC, X86ISD::RDPMC_DAG, 0)));
15150 Initialized = true;
15153 static SDValue LowerINTRINSIC_W_CHAIN(SDValue Op, const X86Subtarget *Subtarget,
15154 SelectionDAG &DAG) {
15155 InitIntinsicsMap();
15156 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
15157 std::map < unsigned, IntrinsicData>::const_iterator itr = IntrMap.find(IntNo);
15158 if (itr == IntrMap.end())
15162 IntrinsicData Intr = itr->second;
15163 switch(Intr.Type) {
15166 // Emit the node with the right value type.
15167 SDVTList VTs = DAG.getVTList(Op->getValueType(0), MVT::Glue, MVT::Other);
15168 SDValue Result = DAG.getNode(Intr.Opc0, dl, VTs, Op.getOperand(0));
15170 // If the value returned by RDRAND/RDSEED was valid (CF=1), return 1.
15171 // Otherwise return the value from Rand, which is always 0, casted to i32.
15172 SDValue Ops[] = { DAG.getZExtOrTrunc(Result, dl, Op->getValueType(1)),
15173 DAG.getConstant(1, Op->getValueType(1)),
15174 DAG.getConstant(X86::COND_B, MVT::i32),
15175 SDValue(Result.getNode(), 1) };
15176 SDValue isValid = DAG.getNode(X86ISD::CMOV, dl,
15177 DAG.getVTList(Op->getValueType(1), MVT::Glue),
15180 // Return { result, isValid, chain }.
15181 return DAG.getNode(ISD::MERGE_VALUES, dl, Op->getVTList(), Result, isValid,
15182 SDValue(Result.getNode(), 2));
15185 //gather(v1, mask, index, base, scale);
15186 SDValue Chain = Op.getOperand(0);
15187 SDValue Src = Op.getOperand(2);
15188 SDValue Base = Op.getOperand(3);
15189 SDValue Index = Op.getOperand(4);
15190 SDValue Mask = Op.getOperand(5);
15191 SDValue Scale = Op.getOperand(6);
15192 return getGatherNode(Intr.Opc0, Op, DAG, Src, Mask, Base, Index, Scale, Chain,
15196 //scatter(base, mask, index, v1, scale);
15197 SDValue Chain = Op.getOperand(0);
15198 SDValue Base = Op.getOperand(2);
15199 SDValue Mask = Op.getOperand(3);
15200 SDValue Index = Op.getOperand(4);
15201 SDValue Src = Op.getOperand(5);
15202 SDValue Scale = Op.getOperand(6);
15203 return getScatterNode(Intr.Opc0, Op, DAG, Src, Mask, Base, Index, Scale, Chain);
15206 SDValue Hint = Op.getOperand(6);
15208 if (dyn_cast<ConstantSDNode> (Hint) == nullptr ||
15209 (HintVal = dyn_cast<ConstantSDNode> (Hint)->getZExtValue()) > 1)
15210 llvm_unreachable("Wrong prefetch hint in intrinsic: should be 0 or 1");
15211 unsigned Opcode = (HintVal ? Intr.Opc1 : Intr.Opc0);
15212 SDValue Chain = Op.getOperand(0);
15213 SDValue Mask = Op.getOperand(2);
15214 SDValue Index = Op.getOperand(3);
15215 SDValue Base = Op.getOperand(4);
15216 SDValue Scale = Op.getOperand(5);
15217 return getPrefetchNode(Opcode, Op, DAG, Mask, Base, Index, Scale, Chain);
15219 // Read Time Stamp Counter (RDTSC) and Processor ID (RDTSCP).
15221 SmallVector<SDValue, 2> Results;
15222 getReadTimeStampCounter(Op.getNode(), dl, Intr.Opc0, DAG, Subtarget, Results);
15223 return DAG.getMergeValues(Results, dl);
15225 // Read Performance Monitoring Counters.
15227 SmallVector<SDValue, 2> Results;
15228 getReadPerformanceCounter(Op.getNode(), dl, DAG, Subtarget, Results);
15229 return DAG.getMergeValues(Results, dl);
15231 // XTEST intrinsics.
15233 SDVTList VTs = DAG.getVTList(Op->getValueType(0), MVT::Other);
15234 SDValue InTrans = DAG.getNode(X86ISD::XTEST, dl, VTs, Op.getOperand(0));
15235 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
15236 DAG.getConstant(X86::COND_NE, MVT::i8),
15238 SDValue Ret = DAG.getNode(ISD::ZERO_EXTEND, dl, Op->getValueType(0), SetCC);
15239 return DAG.getNode(ISD::MERGE_VALUES, dl, Op->getVTList(),
15240 Ret, SDValue(InTrans.getNode(), 1));
15243 llvm_unreachable("Unknown Intrinsic Type");
15246 SDValue X86TargetLowering::LowerRETURNADDR(SDValue Op,
15247 SelectionDAG &DAG) const {
15248 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
15249 MFI->setReturnAddressIsTaken(true);
15251 if (verifyReturnAddressArgumentIsConstant(Op, DAG))
15254 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
15256 EVT PtrVT = getPointerTy();
15259 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
15260 const X86RegisterInfo *RegInfo = static_cast<const X86RegisterInfo *>(
15261 DAG.getSubtarget().getRegisterInfo());
15262 SDValue Offset = DAG.getConstant(RegInfo->getSlotSize(), PtrVT);
15263 return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
15264 DAG.getNode(ISD::ADD, dl, PtrVT,
15265 FrameAddr, Offset),
15266 MachinePointerInfo(), false, false, false, 0);
15269 // Just load the return address.
15270 SDValue RetAddrFI = getReturnAddressFrameIndex(DAG);
15271 return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
15272 RetAddrFI, MachinePointerInfo(), false, false, false, 0);
15275 SDValue X86TargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
15276 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
15277 MFI->setFrameAddressIsTaken(true);
15279 EVT VT = Op.getValueType();
15280 SDLoc dl(Op); // FIXME probably not meaningful
15281 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
15282 const X86RegisterInfo *RegInfo = static_cast<const X86RegisterInfo *>(
15283 DAG.getSubtarget().getRegisterInfo());
15284 unsigned FrameReg = RegInfo->getFrameRegister(DAG.getMachineFunction());
15285 assert(((FrameReg == X86::RBP && VT == MVT::i64) ||
15286 (FrameReg == X86::EBP && VT == MVT::i32)) &&
15287 "Invalid Frame Register!");
15288 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
15290 FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr,
15291 MachinePointerInfo(),
15292 false, false, false, 0);
15296 // FIXME? Maybe this could be a TableGen attribute on some registers and
15297 // this table could be generated automatically from RegInfo.
15298 unsigned X86TargetLowering::getRegisterByName(const char* RegName,
15300 unsigned Reg = StringSwitch<unsigned>(RegName)
15301 .Case("esp", X86::ESP)
15302 .Case("rsp", X86::RSP)
15306 report_fatal_error("Invalid register name global variable");
15309 SDValue X86TargetLowering::LowerFRAME_TO_ARGS_OFFSET(SDValue Op,
15310 SelectionDAG &DAG) const {
15311 const X86RegisterInfo *RegInfo = static_cast<const X86RegisterInfo *>(
15312 DAG.getSubtarget().getRegisterInfo());
15313 return DAG.getIntPtrConstant(2 * RegInfo->getSlotSize());
15316 SDValue X86TargetLowering::LowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const {
15317 SDValue Chain = Op.getOperand(0);
15318 SDValue Offset = Op.getOperand(1);
15319 SDValue Handler = Op.getOperand(2);
15322 EVT PtrVT = getPointerTy();
15323 const X86RegisterInfo *RegInfo = static_cast<const X86RegisterInfo *>(
15324 DAG.getSubtarget().getRegisterInfo());
15325 unsigned FrameReg = RegInfo->getFrameRegister(DAG.getMachineFunction());
15326 assert(((FrameReg == X86::RBP && PtrVT == MVT::i64) ||
15327 (FrameReg == X86::EBP && PtrVT == MVT::i32)) &&
15328 "Invalid Frame Register!");
15329 SDValue Frame = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, PtrVT);
15330 unsigned StoreAddrReg = (PtrVT == MVT::i64) ? X86::RCX : X86::ECX;
15332 SDValue StoreAddr = DAG.getNode(ISD::ADD, dl, PtrVT, Frame,
15333 DAG.getIntPtrConstant(RegInfo->getSlotSize()));
15334 StoreAddr = DAG.getNode(ISD::ADD, dl, PtrVT, StoreAddr, Offset);
15335 Chain = DAG.getStore(Chain, dl, Handler, StoreAddr, MachinePointerInfo(),
15337 Chain = DAG.getCopyToReg(Chain, dl, StoreAddrReg, StoreAddr);
15339 return DAG.getNode(X86ISD::EH_RETURN, dl, MVT::Other, Chain,
15340 DAG.getRegister(StoreAddrReg, PtrVT));
15343 SDValue X86TargetLowering::lowerEH_SJLJ_SETJMP(SDValue Op,
15344 SelectionDAG &DAG) const {
15346 return DAG.getNode(X86ISD::EH_SJLJ_SETJMP, DL,
15347 DAG.getVTList(MVT::i32, MVT::Other),
15348 Op.getOperand(0), Op.getOperand(1));
15351 SDValue X86TargetLowering::lowerEH_SJLJ_LONGJMP(SDValue Op,
15352 SelectionDAG &DAG) const {
15354 return DAG.getNode(X86ISD::EH_SJLJ_LONGJMP, DL, MVT::Other,
15355 Op.getOperand(0), Op.getOperand(1));
15358 static SDValue LowerADJUST_TRAMPOLINE(SDValue Op, SelectionDAG &DAG) {
15359 return Op.getOperand(0);
15362 SDValue X86TargetLowering::LowerINIT_TRAMPOLINE(SDValue Op,
15363 SelectionDAG &DAG) const {
15364 SDValue Root = Op.getOperand(0);
15365 SDValue Trmp = Op.getOperand(1); // trampoline
15366 SDValue FPtr = Op.getOperand(2); // nested function
15367 SDValue Nest = Op.getOperand(3); // 'nest' parameter value
15370 const Value *TrmpAddr = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
15371 const TargetRegisterInfo *TRI = DAG.getSubtarget().getRegisterInfo();
15373 if (Subtarget->is64Bit()) {
15374 SDValue OutChains[6];
15376 // Large code-model.
15377 const unsigned char JMP64r = 0xFF; // 64-bit jmp through register opcode.
15378 const unsigned char MOV64ri = 0xB8; // X86::MOV64ri opcode.
15380 const unsigned char N86R10 = TRI->getEncodingValue(X86::R10) & 0x7;
15381 const unsigned char N86R11 = TRI->getEncodingValue(X86::R11) & 0x7;
15383 const unsigned char REX_WB = 0x40 | 0x08 | 0x01; // REX prefix
15385 // Load the pointer to the nested function into R11.
15386 unsigned OpCode = ((MOV64ri | N86R11) << 8) | REX_WB; // movabsq r11
15387 SDValue Addr = Trmp;
15388 OutChains[0] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
15389 Addr, MachinePointerInfo(TrmpAddr),
15392 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
15393 DAG.getConstant(2, MVT::i64));
15394 OutChains[1] = DAG.getStore(Root, dl, FPtr, Addr,
15395 MachinePointerInfo(TrmpAddr, 2),
15398 // Load the 'nest' parameter value into R10.
15399 // R10 is specified in X86CallingConv.td
15400 OpCode = ((MOV64ri | N86R10) << 8) | REX_WB; // movabsq r10
15401 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
15402 DAG.getConstant(10, MVT::i64));
15403 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
15404 Addr, MachinePointerInfo(TrmpAddr, 10),
15407 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
15408 DAG.getConstant(12, MVT::i64));
15409 OutChains[3] = DAG.getStore(Root, dl, Nest, Addr,
15410 MachinePointerInfo(TrmpAddr, 12),
15413 // Jump to the nested function.
15414 OpCode = (JMP64r << 8) | REX_WB; // jmpq *...
15415 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
15416 DAG.getConstant(20, MVT::i64));
15417 OutChains[4] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
15418 Addr, MachinePointerInfo(TrmpAddr, 20),
15421 unsigned char ModRM = N86R11 | (4 << 3) | (3 << 6); // ...r11
15422 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
15423 DAG.getConstant(22, MVT::i64));
15424 OutChains[5] = DAG.getStore(Root, dl, DAG.getConstant(ModRM, MVT::i8), Addr,
15425 MachinePointerInfo(TrmpAddr, 22),
15428 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains);
15430 const Function *Func =
15431 cast<Function>(cast<SrcValueSDNode>(Op.getOperand(5))->getValue());
15432 CallingConv::ID CC = Func->getCallingConv();
15437 llvm_unreachable("Unsupported calling convention");
15438 case CallingConv::C:
15439 case CallingConv::X86_StdCall: {
15440 // Pass 'nest' parameter in ECX.
15441 // Must be kept in sync with X86CallingConv.td
15442 NestReg = X86::ECX;
15444 // Check that ECX wasn't needed by an 'inreg' parameter.
15445 FunctionType *FTy = Func->getFunctionType();
15446 const AttributeSet &Attrs = Func->getAttributes();
15448 if (!Attrs.isEmpty() && !Func->isVarArg()) {
15449 unsigned InRegCount = 0;
15452 for (FunctionType::param_iterator I = FTy->param_begin(),
15453 E = FTy->param_end(); I != E; ++I, ++Idx)
15454 if (Attrs.hasAttribute(Idx, Attribute::InReg))
15455 // FIXME: should only count parameters that are lowered to integers.
15456 InRegCount += (TD->getTypeSizeInBits(*I) + 31) / 32;
15458 if (InRegCount > 2) {
15459 report_fatal_error("Nest register in use - reduce number of inreg"
15465 case CallingConv::X86_FastCall:
15466 case CallingConv::X86_ThisCall:
15467 case CallingConv::Fast:
15468 // Pass 'nest' parameter in EAX.
15469 // Must be kept in sync with X86CallingConv.td
15470 NestReg = X86::EAX;
15474 SDValue OutChains[4];
15475 SDValue Addr, Disp;
15477 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
15478 DAG.getConstant(10, MVT::i32));
15479 Disp = DAG.getNode(ISD::SUB, dl, MVT::i32, FPtr, Addr);
15481 // This is storing the opcode for MOV32ri.
15482 const unsigned char MOV32ri = 0xB8; // X86::MOV32ri's opcode byte.
15483 const unsigned char N86Reg = TRI->getEncodingValue(NestReg) & 0x7;
15484 OutChains[0] = DAG.getStore(Root, dl,
15485 DAG.getConstant(MOV32ri|N86Reg, MVT::i8),
15486 Trmp, MachinePointerInfo(TrmpAddr),
15489 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
15490 DAG.getConstant(1, MVT::i32));
15491 OutChains[1] = DAG.getStore(Root, dl, Nest, Addr,
15492 MachinePointerInfo(TrmpAddr, 1),
15495 const unsigned char JMP = 0xE9; // jmp <32bit dst> opcode.
15496 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
15497 DAG.getConstant(5, MVT::i32));
15498 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(JMP, MVT::i8), Addr,
15499 MachinePointerInfo(TrmpAddr, 5),
15502 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
15503 DAG.getConstant(6, MVT::i32));
15504 OutChains[3] = DAG.getStore(Root, dl, Disp, Addr,
15505 MachinePointerInfo(TrmpAddr, 6),
15508 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains);
15512 SDValue X86TargetLowering::LowerFLT_ROUNDS_(SDValue Op,
15513 SelectionDAG &DAG) const {
15515 The rounding mode is in bits 11:10 of FPSR, and has the following
15517 00 Round to nearest
15522 FLT_ROUNDS, on the other hand, expects the following:
15529 To perform the conversion, we do:
15530 (((((FPSR & 0x800) >> 11) | ((FPSR & 0x400) >> 9)) + 1) & 3)
15533 MachineFunction &MF = DAG.getMachineFunction();
15534 const TargetMachine &TM = MF.getTarget();
15535 const TargetFrameLowering &TFI = *TM.getSubtargetImpl()->getFrameLowering();
15536 unsigned StackAlignment = TFI.getStackAlignment();
15537 MVT VT = Op.getSimpleValueType();
15540 // Save FP Control Word to stack slot
15541 int SSFI = MF.getFrameInfo()->CreateStackObject(2, StackAlignment, false);
15542 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
15544 MachineMemOperand *MMO =
15545 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
15546 MachineMemOperand::MOStore, 2, 2);
15548 SDValue Ops[] = { DAG.getEntryNode(), StackSlot };
15549 SDValue Chain = DAG.getMemIntrinsicNode(X86ISD::FNSTCW16m, DL,
15550 DAG.getVTList(MVT::Other),
15551 Ops, MVT::i16, MMO);
15553 // Load FP Control Word from stack slot
15554 SDValue CWD = DAG.getLoad(MVT::i16, DL, Chain, StackSlot,
15555 MachinePointerInfo(), false, false, false, 0);
15557 // Transform as necessary
15559 DAG.getNode(ISD::SRL, DL, MVT::i16,
15560 DAG.getNode(ISD::AND, DL, MVT::i16,
15561 CWD, DAG.getConstant(0x800, MVT::i16)),
15562 DAG.getConstant(11, MVT::i8));
15564 DAG.getNode(ISD::SRL, DL, MVT::i16,
15565 DAG.getNode(ISD::AND, DL, MVT::i16,
15566 CWD, DAG.getConstant(0x400, MVT::i16)),
15567 DAG.getConstant(9, MVT::i8));
15570 DAG.getNode(ISD::AND, DL, MVT::i16,
15571 DAG.getNode(ISD::ADD, DL, MVT::i16,
15572 DAG.getNode(ISD::OR, DL, MVT::i16, CWD1, CWD2),
15573 DAG.getConstant(1, MVT::i16)),
15574 DAG.getConstant(3, MVT::i16));
15576 return DAG.getNode((VT.getSizeInBits() < 16 ?
15577 ISD::TRUNCATE : ISD::ZERO_EXTEND), DL, VT, RetVal);
15580 static SDValue LowerCTLZ(SDValue Op, SelectionDAG &DAG) {
15581 MVT VT = Op.getSimpleValueType();
15583 unsigned NumBits = VT.getSizeInBits();
15586 Op = Op.getOperand(0);
15587 if (VT == MVT::i8) {
15588 // Zero extend to i32 since there is not an i8 bsr.
15590 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
15593 // Issue a bsr (scan bits in reverse) which also sets EFLAGS.
15594 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
15595 Op = DAG.getNode(X86ISD::BSR, dl, VTs, Op);
15597 // If src is zero (i.e. bsr sets ZF), returns NumBits.
15600 DAG.getConstant(NumBits+NumBits-1, OpVT),
15601 DAG.getConstant(X86::COND_E, MVT::i8),
15604 Op = DAG.getNode(X86ISD::CMOV, dl, OpVT, Ops);
15606 // Finally xor with NumBits-1.
15607 Op = DAG.getNode(ISD::XOR, dl, OpVT, Op, DAG.getConstant(NumBits-1, OpVT));
15610 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
15614 static SDValue LowerCTLZ_ZERO_UNDEF(SDValue Op, SelectionDAG &DAG) {
15615 MVT VT = Op.getSimpleValueType();
15617 unsigned NumBits = VT.getSizeInBits();
15620 Op = Op.getOperand(0);
15621 if (VT == MVT::i8) {
15622 // Zero extend to i32 since there is not an i8 bsr.
15624 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
15627 // Issue a bsr (scan bits in reverse).
15628 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
15629 Op = DAG.getNode(X86ISD::BSR, dl, VTs, Op);
15631 // And xor with NumBits-1.
15632 Op = DAG.getNode(ISD::XOR, dl, OpVT, Op, DAG.getConstant(NumBits-1, OpVT));
15635 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
15639 static SDValue LowerCTTZ(SDValue Op, SelectionDAG &DAG) {
15640 MVT VT = Op.getSimpleValueType();
15641 unsigned NumBits = VT.getSizeInBits();
15643 Op = Op.getOperand(0);
15645 // Issue a bsf (scan bits forward) which also sets EFLAGS.
15646 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
15647 Op = DAG.getNode(X86ISD::BSF, dl, VTs, Op);
15649 // If src is zero (i.e. bsf sets ZF), returns NumBits.
15652 DAG.getConstant(NumBits, VT),
15653 DAG.getConstant(X86::COND_E, MVT::i8),
15656 return DAG.getNode(X86ISD::CMOV, dl, VT, Ops);
15659 // Lower256IntArith - Break a 256-bit integer operation into two new 128-bit
15660 // ones, and then concatenate the result back.
15661 static SDValue Lower256IntArith(SDValue Op, SelectionDAG &DAG) {
15662 MVT VT = Op.getSimpleValueType();
15664 assert(VT.is256BitVector() && VT.isInteger() &&
15665 "Unsupported value type for operation");
15667 unsigned NumElems = VT.getVectorNumElements();
15670 // Extract the LHS vectors
15671 SDValue LHS = Op.getOperand(0);
15672 SDValue LHS1 = Extract128BitVector(LHS, 0, DAG, dl);
15673 SDValue LHS2 = Extract128BitVector(LHS, NumElems/2, DAG, dl);
15675 // Extract the RHS vectors
15676 SDValue RHS = Op.getOperand(1);
15677 SDValue RHS1 = Extract128BitVector(RHS, 0, DAG, dl);
15678 SDValue RHS2 = Extract128BitVector(RHS, NumElems/2, DAG, dl);
15680 MVT EltVT = VT.getVectorElementType();
15681 MVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
15683 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT,
15684 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, RHS1),
15685 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, RHS2));
15688 static SDValue LowerADD(SDValue Op, SelectionDAG &DAG) {
15689 assert(Op.getSimpleValueType().is256BitVector() &&
15690 Op.getSimpleValueType().isInteger() &&
15691 "Only handle AVX 256-bit vector integer operation");
15692 return Lower256IntArith(Op, DAG);
15695 static SDValue LowerSUB(SDValue Op, SelectionDAG &DAG) {
15696 assert(Op.getSimpleValueType().is256BitVector() &&
15697 Op.getSimpleValueType().isInteger() &&
15698 "Only handle AVX 256-bit vector integer operation");
15699 return Lower256IntArith(Op, DAG);
15702 static SDValue LowerMUL(SDValue Op, const X86Subtarget *Subtarget,
15703 SelectionDAG &DAG) {
15705 MVT VT = Op.getSimpleValueType();
15707 // Decompose 256-bit ops into smaller 128-bit ops.
15708 if (VT.is256BitVector() && !Subtarget->hasInt256())
15709 return Lower256IntArith(Op, DAG);
15711 SDValue A = Op.getOperand(0);
15712 SDValue B = Op.getOperand(1);
15714 // Lower v4i32 mul as 2x shuffle, 2x pmuludq, 2x shuffle.
15715 if (VT == MVT::v4i32) {
15716 assert(Subtarget->hasSSE2() && !Subtarget->hasSSE41() &&
15717 "Should not custom lower when pmuldq is available!");
15719 // Extract the odd parts.
15720 static const int UnpackMask[] = { 1, -1, 3, -1 };
15721 SDValue Aodds = DAG.getVectorShuffle(VT, dl, A, A, UnpackMask);
15722 SDValue Bodds = DAG.getVectorShuffle(VT, dl, B, B, UnpackMask);
15724 // Multiply the even parts.
15725 SDValue Evens = DAG.getNode(X86ISD::PMULUDQ, dl, MVT::v2i64, A, B);
15726 // Now multiply odd parts.
15727 SDValue Odds = DAG.getNode(X86ISD::PMULUDQ, dl, MVT::v2i64, Aodds, Bodds);
15729 Evens = DAG.getNode(ISD::BITCAST, dl, VT, Evens);
15730 Odds = DAG.getNode(ISD::BITCAST, dl, VT, Odds);
15732 // Merge the two vectors back together with a shuffle. This expands into 2
15734 static const int ShufMask[] = { 0, 4, 2, 6 };
15735 return DAG.getVectorShuffle(VT, dl, Evens, Odds, ShufMask);
15738 assert((VT == MVT::v2i64 || VT == MVT::v4i64 || VT == MVT::v8i64) &&
15739 "Only know how to lower V2I64/V4I64/V8I64 multiply");
15741 // Ahi = psrlqi(a, 32);
15742 // Bhi = psrlqi(b, 32);
15744 // AloBlo = pmuludq(a, b);
15745 // AloBhi = pmuludq(a, Bhi);
15746 // AhiBlo = pmuludq(Ahi, b);
15748 // AloBhi = psllqi(AloBhi, 32);
15749 // AhiBlo = psllqi(AhiBlo, 32);
15750 // return AloBlo + AloBhi + AhiBlo;
15752 SDValue Ahi = getTargetVShiftByConstNode(X86ISD::VSRLI, dl, VT, A, 32, DAG);
15753 SDValue Bhi = getTargetVShiftByConstNode(X86ISD::VSRLI, dl, VT, B, 32, DAG);
15755 // Bit cast to 32-bit vectors for MULUDQ
15756 EVT MulVT = (VT == MVT::v2i64) ? MVT::v4i32 :
15757 (VT == MVT::v4i64) ? MVT::v8i32 : MVT::v16i32;
15758 A = DAG.getNode(ISD::BITCAST, dl, MulVT, A);
15759 B = DAG.getNode(ISD::BITCAST, dl, MulVT, B);
15760 Ahi = DAG.getNode(ISD::BITCAST, dl, MulVT, Ahi);
15761 Bhi = DAG.getNode(ISD::BITCAST, dl, MulVT, Bhi);
15763 SDValue AloBlo = DAG.getNode(X86ISD::PMULUDQ, dl, VT, A, B);
15764 SDValue AloBhi = DAG.getNode(X86ISD::PMULUDQ, dl, VT, A, Bhi);
15765 SDValue AhiBlo = DAG.getNode(X86ISD::PMULUDQ, dl, VT, Ahi, B);
15767 AloBhi = getTargetVShiftByConstNode(X86ISD::VSHLI, dl, VT, AloBhi, 32, DAG);
15768 AhiBlo = getTargetVShiftByConstNode(X86ISD::VSHLI, dl, VT, AhiBlo, 32, DAG);
15770 SDValue Res = DAG.getNode(ISD::ADD, dl, VT, AloBlo, AloBhi);
15771 return DAG.getNode(ISD::ADD, dl, VT, Res, AhiBlo);
15774 SDValue X86TargetLowering::LowerWin64_i128OP(SDValue Op, SelectionDAG &DAG) const {
15775 assert(Subtarget->isTargetWin64() && "Unexpected target");
15776 EVT VT = Op.getValueType();
15777 assert(VT.isInteger() && VT.getSizeInBits() == 128 &&
15778 "Unexpected return type for lowering");
15782 switch (Op->getOpcode()) {
15783 default: llvm_unreachable("Unexpected request for libcall!");
15784 case ISD::SDIV: isSigned = true; LC = RTLIB::SDIV_I128; break;
15785 case ISD::UDIV: isSigned = false; LC = RTLIB::UDIV_I128; break;
15786 case ISD::SREM: isSigned = true; LC = RTLIB::SREM_I128; break;
15787 case ISD::UREM: isSigned = false; LC = RTLIB::UREM_I128; break;
15788 case ISD::SDIVREM: isSigned = true; LC = RTLIB::SDIVREM_I128; break;
15789 case ISD::UDIVREM: isSigned = false; LC = RTLIB::UDIVREM_I128; break;
15793 SDValue InChain = DAG.getEntryNode();
15795 TargetLowering::ArgListTy Args;
15796 TargetLowering::ArgListEntry Entry;
15797 for (unsigned i = 0, e = Op->getNumOperands(); i != e; ++i) {
15798 EVT ArgVT = Op->getOperand(i).getValueType();
15799 assert(ArgVT.isInteger() && ArgVT.getSizeInBits() == 128 &&
15800 "Unexpected argument type for lowering");
15801 SDValue StackPtr = DAG.CreateStackTemporary(ArgVT, 16);
15802 Entry.Node = StackPtr;
15803 InChain = DAG.getStore(InChain, dl, Op->getOperand(i), StackPtr, MachinePointerInfo(),
15805 Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
15806 Entry.Ty = PointerType::get(ArgTy,0);
15807 Entry.isSExt = false;
15808 Entry.isZExt = false;
15809 Args.push_back(Entry);
15812 SDValue Callee = DAG.getExternalSymbol(getLibcallName(LC),
15815 TargetLowering::CallLoweringInfo CLI(DAG);
15816 CLI.setDebugLoc(dl).setChain(InChain)
15817 .setCallee(getLibcallCallingConv(LC),
15818 static_cast<EVT>(MVT::v2i64).getTypeForEVT(*DAG.getContext()),
15819 Callee, std::move(Args), 0)
15820 .setInRegister().setSExtResult(isSigned).setZExtResult(!isSigned);
15822 std::pair<SDValue, SDValue> CallInfo = LowerCallTo(CLI);
15823 return DAG.getNode(ISD::BITCAST, dl, VT, CallInfo.first);
15826 static SDValue LowerMUL_LOHI(SDValue Op, const X86Subtarget *Subtarget,
15827 SelectionDAG &DAG) {
15828 SDValue Op0 = Op.getOperand(0), Op1 = Op.getOperand(1);
15829 EVT VT = Op0.getValueType();
15832 assert((VT == MVT::v4i32 && Subtarget->hasSSE2()) ||
15833 (VT == MVT::v8i32 && Subtarget->hasInt256()));
15835 // PMULxD operations multiply each even value (starting at 0) of LHS with
15836 // the related value of RHS and produce a widen result.
15837 // E.g., PMULUDQ <4 x i32> <a|b|c|d>, <4 x i32> <e|f|g|h>
15838 // => <2 x i64> <ae|cg>
15840 // In other word, to have all the results, we need to perform two PMULxD:
15841 // 1. one with the even values.
15842 // 2. one with the odd values.
15843 // To achieve #2, with need to place the odd values at an even position.
15845 // Place the odd value at an even position (basically, shift all values 1
15846 // step to the left):
15847 const int Mask[] = {1, -1, 3, -1, 5, -1, 7, -1};
15848 // <a|b|c|d> => <b|undef|d|undef>
15849 SDValue Odd0 = DAG.getVectorShuffle(VT, dl, Op0, Op0, Mask);
15850 // <e|f|g|h> => <f|undef|h|undef>
15851 SDValue Odd1 = DAG.getVectorShuffle(VT, dl, Op1, Op1, Mask);
15853 // Emit two multiplies, one for the lower 2 ints and one for the higher 2
15855 MVT MulVT = VT == MVT::v4i32 ? MVT::v2i64 : MVT::v4i64;
15856 bool IsSigned = Op->getOpcode() == ISD::SMUL_LOHI;
15858 (!IsSigned || !Subtarget->hasSSE41()) ? X86ISD::PMULUDQ : X86ISD::PMULDQ;
15859 // PMULUDQ <4 x i32> <a|b|c|d>, <4 x i32> <e|f|g|h>
15860 // => <2 x i64> <ae|cg>
15861 SDValue Mul1 = DAG.getNode(ISD::BITCAST, dl, VT,
15862 DAG.getNode(Opcode, dl, MulVT, Op0, Op1));
15863 // PMULUDQ <4 x i32> <b|undef|d|undef>, <4 x i32> <f|undef|h|undef>
15864 // => <2 x i64> <bf|dh>
15865 SDValue Mul2 = DAG.getNode(ISD::BITCAST, dl, VT,
15866 DAG.getNode(Opcode, dl, MulVT, Odd0, Odd1));
15868 // Shuffle it back into the right order.
15869 SDValue Highs, Lows;
15870 if (VT == MVT::v8i32) {
15871 const int HighMask[] = {1, 9, 3, 11, 5, 13, 7, 15};
15872 Highs = DAG.getVectorShuffle(VT, dl, Mul1, Mul2, HighMask);
15873 const int LowMask[] = {0, 8, 2, 10, 4, 12, 6, 14};
15874 Lows = DAG.getVectorShuffle(VT, dl, Mul1, Mul2, LowMask);
15876 const int HighMask[] = {1, 5, 3, 7};
15877 Highs = DAG.getVectorShuffle(VT, dl, Mul1, Mul2, HighMask);
15878 const int LowMask[] = {1, 4, 2, 6};
15879 Lows = DAG.getVectorShuffle(VT, dl, Mul1, Mul2, LowMask);
15882 // If we have a signed multiply but no PMULDQ fix up the high parts of a
15883 // unsigned multiply.
15884 if (IsSigned && !Subtarget->hasSSE41()) {
15886 DAG.getConstant(31, DAG.getTargetLoweringInfo().getShiftAmountTy(VT));
15887 SDValue T1 = DAG.getNode(ISD::AND, dl, VT,
15888 DAG.getNode(ISD::SRA, dl, VT, Op0, ShAmt), Op1);
15889 SDValue T2 = DAG.getNode(ISD::AND, dl, VT,
15890 DAG.getNode(ISD::SRA, dl, VT, Op1, ShAmt), Op0);
15892 SDValue Fixup = DAG.getNode(ISD::ADD, dl, VT, T1, T2);
15893 Highs = DAG.getNode(ISD::SUB, dl, VT, Highs, Fixup);
15896 // The first result of MUL_LOHI is actually the low value, followed by the
15898 SDValue Ops[] = {Lows, Highs};
15899 return DAG.getMergeValues(Ops, dl);
15902 static SDValue LowerScalarImmediateShift(SDValue Op, SelectionDAG &DAG,
15903 const X86Subtarget *Subtarget) {
15904 MVT VT = Op.getSimpleValueType();
15906 SDValue R = Op.getOperand(0);
15907 SDValue Amt = Op.getOperand(1);
15909 // Optimize shl/srl/sra with constant shift amount.
15910 if (auto *BVAmt = dyn_cast<BuildVectorSDNode>(Amt)) {
15911 if (auto *ShiftConst = BVAmt->getConstantSplatNode()) {
15912 uint64_t ShiftAmt = ShiftConst->getZExtValue();
15914 if (VT == MVT::v2i64 || VT == MVT::v4i32 || VT == MVT::v8i16 ||
15915 (Subtarget->hasInt256() &&
15916 (VT == MVT::v4i64 || VT == MVT::v8i32 || VT == MVT::v16i16)) ||
15917 (Subtarget->hasAVX512() &&
15918 (VT == MVT::v8i64 || VT == MVT::v16i32))) {
15919 if (Op.getOpcode() == ISD::SHL)
15920 return getTargetVShiftByConstNode(X86ISD::VSHLI, dl, VT, R, ShiftAmt,
15922 if (Op.getOpcode() == ISD::SRL)
15923 return getTargetVShiftByConstNode(X86ISD::VSRLI, dl, VT, R, ShiftAmt,
15925 if (Op.getOpcode() == ISD::SRA && VT != MVT::v2i64 && VT != MVT::v4i64)
15926 return getTargetVShiftByConstNode(X86ISD::VSRAI, dl, VT, R, ShiftAmt,
15930 if (VT == MVT::v16i8) {
15931 if (Op.getOpcode() == ISD::SHL) {
15932 // Make a large shift.
15933 SDValue SHL = getTargetVShiftByConstNode(X86ISD::VSHLI, dl,
15934 MVT::v8i16, R, ShiftAmt,
15936 SHL = DAG.getNode(ISD::BITCAST, dl, VT, SHL);
15937 // Zero out the rightmost bits.
15938 SmallVector<SDValue, 16> V(16,
15939 DAG.getConstant(uint8_t(-1U << ShiftAmt),
15941 return DAG.getNode(ISD::AND, dl, VT, SHL,
15942 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, V));
15944 if (Op.getOpcode() == ISD::SRL) {
15945 // Make a large shift.
15946 SDValue SRL = getTargetVShiftByConstNode(X86ISD::VSRLI, dl,
15947 MVT::v8i16, R, ShiftAmt,
15949 SRL = DAG.getNode(ISD::BITCAST, dl, VT, SRL);
15950 // Zero out the leftmost bits.
15951 SmallVector<SDValue, 16> V(16,
15952 DAG.getConstant(uint8_t(-1U) >> ShiftAmt,
15954 return DAG.getNode(ISD::AND, dl, VT, SRL,
15955 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, V));
15957 if (Op.getOpcode() == ISD::SRA) {
15958 if (ShiftAmt == 7) {
15959 // R s>> 7 === R s< 0
15960 SDValue Zeros = getZeroVector(VT, Subtarget, DAG, dl);
15961 return DAG.getNode(X86ISD::PCMPGT, dl, VT, Zeros, R);
15964 // R s>> a === ((R u>> a) ^ m) - m
15965 SDValue Res = DAG.getNode(ISD::SRL, dl, VT, R, Amt);
15966 SmallVector<SDValue, 16> V(16, DAG.getConstant(128 >> ShiftAmt,
15968 SDValue Mask = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, V);
15969 Res = DAG.getNode(ISD::XOR, dl, VT, Res, Mask);
15970 Res = DAG.getNode(ISD::SUB, dl, VT, Res, Mask);
15973 llvm_unreachable("Unknown shift opcode.");
15976 if (Subtarget->hasInt256() && VT == MVT::v32i8) {
15977 if (Op.getOpcode() == ISD::SHL) {
15978 // Make a large shift.
15979 SDValue SHL = getTargetVShiftByConstNode(X86ISD::VSHLI, dl,
15980 MVT::v16i16, R, ShiftAmt,
15982 SHL = DAG.getNode(ISD::BITCAST, dl, VT, SHL);
15983 // Zero out the rightmost bits.
15984 SmallVector<SDValue, 32> V(32,
15985 DAG.getConstant(uint8_t(-1U << ShiftAmt),
15987 return DAG.getNode(ISD::AND, dl, VT, SHL,
15988 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, V));
15990 if (Op.getOpcode() == ISD::SRL) {
15991 // Make a large shift.
15992 SDValue SRL = getTargetVShiftByConstNode(X86ISD::VSRLI, dl,
15993 MVT::v16i16, R, ShiftAmt,
15995 SRL = DAG.getNode(ISD::BITCAST, dl, VT, SRL);
15996 // Zero out the leftmost bits.
15997 SmallVector<SDValue, 32> V(32,
15998 DAG.getConstant(uint8_t(-1U) >> ShiftAmt,
16000 return DAG.getNode(ISD::AND, dl, VT, SRL,
16001 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, V));
16003 if (Op.getOpcode() == ISD::SRA) {
16004 if (ShiftAmt == 7) {
16005 // R s>> 7 === R s< 0
16006 SDValue Zeros = getZeroVector(VT, Subtarget, DAG, dl);
16007 return DAG.getNode(X86ISD::PCMPGT, dl, VT, Zeros, R);
16010 // R s>> a === ((R u>> a) ^ m) - m
16011 SDValue Res = DAG.getNode(ISD::SRL, dl, VT, R, Amt);
16012 SmallVector<SDValue, 32> V(32, DAG.getConstant(128 >> ShiftAmt,
16014 SDValue Mask = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, V);
16015 Res = DAG.getNode(ISD::XOR, dl, VT, Res, Mask);
16016 Res = DAG.getNode(ISD::SUB, dl, VT, Res, Mask);
16019 llvm_unreachable("Unknown shift opcode.");
16024 // Special case in 32-bit mode, where i64 is expanded into high and low parts.
16025 if (!Subtarget->is64Bit() &&
16026 (VT == MVT::v2i64 || (Subtarget->hasInt256() && VT == MVT::v4i64)) &&
16027 Amt.getOpcode() == ISD::BITCAST &&
16028 Amt.getOperand(0).getOpcode() == ISD::BUILD_VECTOR) {
16029 Amt = Amt.getOperand(0);
16030 unsigned Ratio = Amt.getSimpleValueType().getVectorNumElements() /
16031 VT.getVectorNumElements();
16032 unsigned RatioInLog2 = Log2_32_Ceil(Ratio);
16033 uint64_t ShiftAmt = 0;
16034 for (unsigned i = 0; i != Ratio; ++i) {
16035 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Amt.getOperand(i));
16039 ShiftAmt |= C->getZExtValue() << (i * (1 << (6 - RatioInLog2)));
16041 // Check remaining shift amounts.
16042 for (unsigned i = Ratio; i != Amt.getNumOperands(); i += Ratio) {
16043 uint64_t ShAmt = 0;
16044 for (unsigned j = 0; j != Ratio; ++j) {
16045 ConstantSDNode *C =
16046 dyn_cast<ConstantSDNode>(Amt.getOperand(i + j));
16050 ShAmt |= C->getZExtValue() << (j * (1 << (6 - RatioInLog2)));
16052 if (ShAmt != ShiftAmt)
16055 switch (Op.getOpcode()) {
16057 llvm_unreachable("Unknown shift opcode!");
16059 return getTargetVShiftByConstNode(X86ISD::VSHLI, dl, VT, R, ShiftAmt,
16062 return getTargetVShiftByConstNode(X86ISD::VSRLI, dl, VT, R, ShiftAmt,
16065 return getTargetVShiftByConstNode(X86ISD::VSRAI, dl, VT, R, ShiftAmt,
16073 static SDValue LowerScalarVariableShift(SDValue Op, SelectionDAG &DAG,
16074 const X86Subtarget* Subtarget) {
16075 MVT VT = Op.getSimpleValueType();
16077 SDValue R = Op.getOperand(0);
16078 SDValue Amt = Op.getOperand(1);
16080 if ((VT == MVT::v2i64 && Op.getOpcode() != ISD::SRA) ||
16081 VT == MVT::v4i32 || VT == MVT::v8i16 ||
16082 (Subtarget->hasInt256() &&
16083 ((VT == MVT::v4i64 && Op.getOpcode() != ISD::SRA) ||
16084 VT == MVT::v8i32 || VT == MVT::v16i16)) ||
16085 (Subtarget->hasAVX512() && (VT == MVT::v8i64 || VT == MVT::v16i32))) {
16087 EVT EltVT = VT.getVectorElementType();
16089 if (Amt.getOpcode() == ISD::BUILD_VECTOR) {
16090 unsigned NumElts = VT.getVectorNumElements();
16092 for (i = 0; i != NumElts; ++i) {
16093 if (Amt.getOperand(i).getOpcode() == ISD::UNDEF)
16097 for (j = i; j != NumElts; ++j) {
16098 SDValue Arg = Amt.getOperand(j);
16099 if (Arg.getOpcode() == ISD::UNDEF) continue;
16100 if (Arg != Amt.getOperand(i))
16103 if (i != NumElts && j == NumElts)
16104 BaseShAmt = Amt.getOperand(i);
16106 if (Amt.getOpcode() == ISD::EXTRACT_SUBVECTOR)
16107 Amt = Amt.getOperand(0);
16108 if (Amt.getOpcode() == ISD::VECTOR_SHUFFLE &&
16109 cast<ShuffleVectorSDNode>(Amt)->isSplat()) {
16110 SDValue InVec = Amt.getOperand(0);
16111 if (InVec.getOpcode() == ISD::BUILD_VECTOR) {
16112 unsigned NumElts = InVec.getValueType().getVectorNumElements();
16114 for (; i != NumElts; ++i) {
16115 SDValue Arg = InVec.getOperand(i);
16116 if (Arg.getOpcode() == ISD::UNDEF) continue;
16120 } else if (InVec.getOpcode() == ISD::INSERT_VECTOR_ELT) {
16121 if (ConstantSDNode *C =
16122 dyn_cast<ConstantSDNode>(InVec.getOperand(2))) {
16123 unsigned SplatIdx =
16124 cast<ShuffleVectorSDNode>(Amt)->getSplatIndex();
16125 if (C->getZExtValue() == SplatIdx)
16126 BaseShAmt = InVec.getOperand(1);
16129 if (!BaseShAmt.getNode())
16130 BaseShAmt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, Amt,
16131 DAG.getIntPtrConstant(0));
16135 if (BaseShAmt.getNode()) {
16136 if (EltVT.bitsGT(MVT::i32))
16137 BaseShAmt = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, BaseShAmt);
16138 else if (EltVT.bitsLT(MVT::i32))
16139 BaseShAmt = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, BaseShAmt);
16141 switch (Op.getOpcode()) {
16143 llvm_unreachable("Unknown shift opcode!");
16145 switch (VT.SimpleTy) {
16146 default: return SDValue();
16155 return getTargetVShiftNode(X86ISD::VSHLI, dl, VT, R, BaseShAmt, DAG);
16158 switch (VT.SimpleTy) {
16159 default: return SDValue();
16166 return getTargetVShiftNode(X86ISD::VSRAI, dl, VT, R, BaseShAmt, DAG);
16169 switch (VT.SimpleTy) {
16170 default: return SDValue();
16179 return getTargetVShiftNode(X86ISD::VSRLI, dl, VT, R, BaseShAmt, DAG);
16185 // Special case in 32-bit mode, where i64 is expanded into high and low parts.
16186 if (!Subtarget->is64Bit() &&
16187 (VT == MVT::v2i64 || (Subtarget->hasInt256() && VT == MVT::v4i64) ||
16188 (Subtarget->hasAVX512() && VT == MVT::v8i64)) &&
16189 Amt.getOpcode() == ISD::BITCAST &&
16190 Amt.getOperand(0).getOpcode() == ISD::BUILD_VECTOR) {
16191 Amt = Amt.getOperand(0);
16192 unsigned Ratio = Amt.getSimpleValueType().getVectorNumElements() /
16193 VT.getVectorNumElements();
16194 std::vector<SDValue> Vals(Ratio);
16195 for (unsigned i = 0; i != Ratio; ++i)
16196 Vals[i] = Amt.getOperand(i);
16197 for (unsigned i = Ratio; i != Amt.getNumOperands(); i += Ratio) {
16198 for (unsigned j = 0; j != Ratio; ++j)
16199 if (Vals[j] != Amt.getOperand(i + j))
16202 switch (Op.getOpcode()) {
16204 llvm_unreachable("Unknown shift opcode!");
16206 return DAG.getNode(X86ISD::VSHL, dl, VT, R, Op.getOperand(1));
16208 return DAG.getNode(X86ISD::VSRL, dl, VT, R, Op.getOperand(1));
16210 return DAG.getNode(X86ISD::VSRA, dl, VT, R, Op.getOperand(1));
16217 static SDValue LowerShift(SDValue Op, const X86Subtarget* Subtarget,
16218 SelectionDAG &DAG) {
16219 MVT VT = Op.getSimpleValueType();
16221 SDValue R = Op.getOperand(0);
16222 SDValue Amt = Op.getOperand(1);
16225 assert(VT.isVector() && "Custom lowering only for vector shifts!");
16226 assert(Subtarget->hasSSE2() && "Only custom lower when we have SSE2!");
16228 V = LowerScalarImmediateShift(Op, DAG, Subtarget);
16232 V = LowerScalarVariableShift(Op, DAG, Subtarget);
16236 if (Subtarget->hasAVX512() && (VT == MVT::v16i32 || VT == MVT::v8i64))
16238 // AVX2 has VPSLLV/VPSRAV/VPSRLV.
16239 if (Subtarget->hasInt256()) {
16240 if (Op.getOpcode() == ISD::SRL &&
16241 (VT == MVT::v2i64 || VT == MVT::v4i32 ||
16242 VT == MVT::v4i64 || VT == MVT::v8i32))
16244 if (Op.getOpcode() == ISD::SHL &&
16245 (VT == MVT::v2i64 || VT == MVT::v4i32 ||
16246 VT == MVT::v4i64 || VT == MVT::v8i32))
16248 if (Op.getOpcode() == ISD::SRA && (VT == MVT::v4i32 || VT == MVT::v8i32))
16252 // If possible, lower this packed shift into a vector multiply instead of
16253 // expanding it into a sequence of scalar shifts.
16254 // Do this only if the vector shift count is a constant build_vector.
16255 if (Op.getOpcode() == ISD::SHL &&
16256 (VT == MVT::v8i16 || VT == MVT::v4i32 ||
16257 (Subtarget->hasInt256() && VT == MVT::v16i16)) &&
16258 ISD::isBuildVectorOfConstantSDNodes(Amt.getNode())) {
16259 SmallVector<SDValue, 8> Elts;
16260 EVT SVT = VT.getScalarType();
16261 unsigned SVTBits = SVT.getSizeInBits();
16262 const APInt &One = APInt(SVTBits, 1);
16263 unsigned NumElems = VT.getVectorNumElements();
16265 for (unsigned i=0; i !=NumElems; ++i) {
16266 SDValue Op = Amt->getOperand(i);
16267 if (Op->getOpcode() == ISD::UNDEF) {
16268 Elts.push_back(Op);
16272 ConstantSDNode *ND = cast<ConstantSDNode>(Op);
16273 const APInt &C = APInt(SVTBits, ND->getAPIntValue().getZExtValue());
16274 uint64_t ShAmt = C.getZExtValue();
16275 if (ShAmt >= SVTBits) {
16276 Elts.push_back(DAG.getUNDEF(SVT));
16279 Elts.push_back(DAG.getConstant(One.shl(ShAmt), SVT));
16281 SDValue BV = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, Elts);
16282 return DAG.getNode(ISD::MUL, dl, VT, R, BV);
16285 // Lower SHL with variable shift amount.
16286 if (VT == MVT::v4i32 && Op->getOpcode() == ISD::SHL) {
16287 Op = DAG.getNode(ISD::SHL, dl, VT, Amt, DAG.getConstant(23, VT));
16289 Op = DAG.getNode(ISD::ADD, dl, VT, Op, DAG.getConstant(0x3f800000U, VT));
16290 Op = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, Op);
16291 Op = DAG.getNode(ISD::FP_TO_SINT, dl, VT, Op);
16292 return DAG.getNode(ISD::MUL, dl, VT, Op, R);
16295 // If possible, lower this shift as a sequence of two shifts by
16296 // constant plus a MOVSS/MOVSD instead of scalarizing it.
16298 // (v4i32 (srl A, (build_vector < X, Y, Y, Y>)))
16300 // Could be rewritten as:
16301 // (v4i32 (MOVSS (srl A, <Y,Y,Y,Y>), (srl A, <X,X,X,X>)))
16303 // The advantage is that the two shifts from the example would be
16304 // lowered as X86ISD::VSRLI nodes. This would be cheaper than scalarizing
16305 // the vector shift into four scalar shifts plus four pairs of vector
16307 if ((VT == MVT::v8i16 || VT == MVT::v4i32) &&
16308 ISD::isBuildVectorOfConstantSDNodes(Amt.getNode())) {
16309 unsigned TargetOpcode = X86ISD::MOVSS;
16310 bool CanBeSimplified;
16311 // The splat value for the first packed shift (the 'X' from the example).
16312 SDValue Amt1 = Amt->getOperand(0);
16313 // The splat value for the second packed shift (the 'Y' from the example).
16314 SDValue Amt2 = (VT == MVT::v4i32) ? Amt->getOperand(1) :
16315 Amt->getOperand(2);
16317 // See if it is possible to replace this node with a sequence of
16318 // two shifts followed by a MOVSS/MOVSD
16319 if (VT == MVT::v4i32) {
16320 // Check if it is legal to use a MOVSS.
16321 CanBeSimplified = Amt2 == Amt->getOperand(2) &&
16322 Amt2 == Amt->getOperand(3);
16323 if (!CanBeSimplified) {
16324 // Otherwise, check if we can still simplify this node using a MOVSD.
16325 CanBeSimplified = Amt1 == Amt->getOperand(1) &&
16326 Amt->getOperand(2) == Amt->getOperand(3);
16327 TargetOpcode = X86ISD::MOVSD;
16328 Amt2 = Amt->getOperand(2);
16331 // Do similar checks for the case where the machine value type
16333 CanBeSimplified = Amt1 == Amt->getOperand(1);
16334 for (unsigned i=3; i != 8 && CanBeSimplified; ++i)
16335 CanBeSimplified = Amt2 == Amt->getOperand(i);
16337 if (!CanBeSimplified) {
16338 TargetOpcode = X86ISD::MOVSD;
16339 CanBeSimplified = true;
16340 Amt2 = Amt->getOperand(4);
16341 for (unsigned i=0; i != 4 && CanBeSimplified; ++i)
16342 CanBeSimplified = Amt1 == Amt->getOperand(i);
16343 for (unsigned j=4; j != 8 && CanBeSimplified; ++j)
16344 CanBeSimplified = Amt2 == Amt->getOperand(j);
16348 if (CanBeSimplified && isa<ConstantSDNode>(Amt1) &&
16349 isa<ConstantSDNode>(Amt2)) {
16350 // Replace this node with two shifts followed by a MOVSS/MOVSD.
16351 EVT CastVT = MVT::v4i32;
16353 DAG.getConstant(cast<ConstantSDNode>(Amt1)->getAPIntValue(), VT);
16354 SDValue Shift1 = DAG.getNode(Op->getOpcode(), dl, VT, R, Splat1);
16356 DAG.getConstant(cast<ConstantSDNode>(Amt2)->getAPIntValue(), VT);
16357 SDValue Shift2 = DAG.getNode(Op->getOpcode(), dl, VT, R, Splat2);
16358 if (TargetOpcode == X86ISD::MOVSD)
16359 CastVT = MVT::v2i64;
16360 SDValue BitCast1 = DAG.getNode(ISD::BITCAST, dl, CastVT, Shift1);
16361 SDValue BitCast2 = DAG.getNode(ISD::BITCAST, dl, CastVT, Shift2);
16362 SDValue Result = getTargetShuffleNode(TargetOpcode, dl, CastVT, BitCast2,
16364 return DAG.getNode(ISD::BITCAST, dl, VT, Result);
16368 if (VT == MVT::v16i8 && Op->getOpcode() == ISD::SHL) {
16369 assert(Subtarget->hasSSE2() && "Need SSE2 for pslli/pcmpeq.");
16372 Op = DAG.getNode(ISD::SHL, dl, VT, Amt, DAG.getConstant(5, VT));
16373 Op = DAG.getNode(ISD::BITCAST, dl, VT, Op);
16375 // Turn 'a' into a mask suitable for VSELECT
16376 SDValue VSelM = DAG.getConstant(0x80, VT);
16377 SDValue OpVSel = DAG.getNode(ISD::AND, dl, VT, VSelM, Op);
16378 OpVSel = DAG.getNode(X86ISD::PCMPEQ, dl, VT, OpVSel, VSelM);
16380 SDValue CM1 = DAG.getConstant(0x0f, VT);
16381 SDValue CM2 = DAG.getConstant(0x3f, VT);
16383 // r = VSELECT(r, psllw(r & (char16)15, 4), a);
16384 SDValue M = DAG.getNode(ISD::AND, dl, VT, R, CM1);
16385 M = getTargetVShiftByConstNode(X86ISD::VSHLI, dl, MVT::v8i16, M, 4, DAG);
16386 M = DAG.getNode(ISD::BITCAST, dl, VT, M);
16387 R = DAG.getNode(ISD::VSELECT, dl, VT, OpVSel, M, R);
16390 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Op);
16391 OpVSel = DAG.getNode(ISD::AND, dl, VT, VSelM, Op);
16392 OpVSel = DAG.getNode(X86ISD::PCMPEQ, dl, VT, OpVSel, VSelM);
16394 // r = VSELECT(r, psllw(r & (char16)63, 2), a);
16395 M = DAG.getNode(ISD::AND, dl, VT, R, CM2);
16396 M = getTargetVShiftByConstNode(X86ISD::VSHLI, dl, MVT::v8i16, M, 2, DAG);
16397 M = DAG.getNode(ISD::BITCAST, dl, VT, M);
16398 R = DAG.getNode(ISD::VSELECT, dl, VT, OpVSel, M, R);
16401 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Op);
16402 OpVSel = DAG.getNode(ISD::AND, dl, VT, VSelM, Op);
16403 OpVSel = DAG.getNode(X86ISD::PCMPEQ, dl, VT, OpVSel, VSelM);
16405 // return VSELECT(r, r+r, a);
16406 R = DAG.getNode(ISD::VSELECT, dl, VT, OpVSel,
16407 DAG.getNode(ISD::ADD, dl, VT, R, R), R);
16411 // It's worth extending once and using the v8i32 shifts for 16-bit types, but
16412 // the extra overheads to get from v16i8 to v8i32 make the existing SSE
16413 // solution better.
16414 if (Subtarget->hasInt256() && VT == MVT::v8i16) {
16415 MVT NewVT = VT == MVT::v8i16 ? MVT::v8i32 : MVT::v16i16;
16417 Op.getOpcode() == ISD::SRA ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND;
16418 R = DAG.getNode(ExtOpc, dl, NewVT, R);
16419 Amt = DAG.getNode(ISD::ANY_EXTEND, dl, NewVT, Amt);
16420 return DAG.getNode(ISD::TRUNCATE, dl, VT,
16421 DAG.getNode(Op.getOpcode(), dl, NewVT, R, Amt));
16424 // Decompose 256-bit shifts into smaller 128-bit shifts.
16425 if (VT.is256BitVector()) {
16426 unsigned NumElems = VT.getVectorNumElements();
16427 MVT EltVT = VT.getVectorElementType();
16428 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
16430 // Extract the two vectors
16431 SDValue V1 = Extract128BitVector(R, 0, DAG, dl);
16432 SDValue V2 = Extract128BitVector(R, NumElems/2, DAG, dl);
16434 // Recreate the shift amount vectors
16435 SDValue Amt1, Amt2;
16436 if (Amt.getOpcode() == ISD::BUILD_VECTOR) {
16437 // Constant shift amount
16438 SmallVector<SDValue, 4> Amt1Csts;
16439 SmallVector<SDValue, 4> Amt2Csts;
16440 for (unsigned i = 0; i != NumElems/2; ++i)
16441 Amt1Csts.push_back(Amt->getOperand(i));
16442 for (unsigned i = NumElems/2; i != NumElems; ++i)
16443 Amt2Csts.push_back(Amt->getOperand(i));
16445 Amt1 = DAG.getNode(ISD::BUILD_VECTOR, dl, NewVT, Amt1Csts);
16446 Amt2 = DAG.getNode(ISD::BUILD_VECTOR, dl, NewVT, Amt2Csts);
16448 // Variable shift amount
16449 Amt1 = Extract128BitVector(Amt, 0, DAG, dl);
16450 Amt2 = Extract128BitVector(Amt, NumElems/2, DAG, dl);
16453 // Issue new vector shifts for the smaller types
16454 V1 = DAG.getNode(Op.getOpcode(), dl, NewVT, V1, Amt1);
16455 V2 = DAG.getNode(Op.getOpcode(), dl, NewVT, V2, Amt2);
16457 // Concatenate the result back
16458 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, V1, V2);
16464 static SDValue LowerXALUO(SDValue Op, SelectionDAG &DAG) {
16465 // Lower the "add/sub/mul with overflow" instruction into a regular ins plus
16466 // a "setcc" instruction that checks the overflow flag. The "brcond" lowering
16467 // looks for this combo and may remove the "setcc" instruction if the "setcc"
16468 // has only one use.
16469 SDNode *N = Op.getNode();
16470 SDValue LHS = N->getOperand(0);
16471 SDValue RHS = N->getOperand(1);
16472 unsigned BaseOp = 0;
16475 switch (Op.getOpcode()) {
16476 default: llvm_unreachable("Unknown ovf instruction!");
16478 // A subtract of one will be selected as a INC. Note that INC doesn't
16479 // set CF, so we can't do this for UADDO.
16480 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS))
16482 BaseOp = X86ISD::INC;
16483 Cond = X86::COND_O;
16486 BaseOp = X86ISD::ADD;
16487 Cond = X86::COND_O;
16490 BaseOp = X86ISD::ADD;
16491 Cond = X86::COND_B;
16494 // A subtract of one will be selected as a DEC. Note that DEC doesn't
16495 // set CF, so we can't do this for USUBO.
16496 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS))
16498 BaseOp = X86ISD::DEC;
16499 Cond = X86::COND_O;
16502 BaseOp = X86ISD::SUB;
16503 Cond = X86::COND_O;
16506 BaseOp = X86ISD::SUB;
16507 Cond = X86::COND_B;
16510 BaseOp = X86ISD::SMUL;
16511 Cond = X86::COND_O;
16513 case ISD::UMULO: { // i64, i8 = umulo lhs, rhs --> i64, i64, i32 umul lhs,rhs
16514 SDVTList VTs = DAG.getVTList(N->getValueType(0), N->getValueType(0),
16516 SDValue Sum = DAG.getNode(X86ISD::UMUL, DL, VTs, LHS, RHS);
16519 DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
16520 DAG.getConstant(X86::COND_O, MVT::i32),
16521 SDValue(Sum.getNode(), 2));
16523 return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), Sum, SetCC);
16527 // Also sets EFLAGS.
16528 SDVTList VTs = DAG.getVTList(N->getValueType(0), MVT::i32);
16529 SDValue Sum = DAG.getNode(BaseOp, DL, VTs, LHS, RHS);
16532 DAG.getNode(X86ISD::SETCC, DL, N->getValueType(1),
16533 DAG.getConstant(Cond, MVT::i32),
16534 SDValue(Sum.getNode(), 1));
16536 return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), Sum, SetCC);
16539 SDValue X86TargetLowering::LowerSIGN_EXTEND_INREG(SDValue Op,
16540 SelectionDAG &DAG) const {
16542 EVT ExtraVT = cast<VTSDNode>(Op.getOperand(1))->getVT();
16543 MVT VT = Op.getSimpleValueType();
16545 if (!Subtarget->hasSSE2() || !VT.isVector())
16548 unsigned BitsDiff = VT.getScalarType().getSizeInBits() -
16549 ExtraVT.getScalarType().getSizeInBits();
16551 switch (VT.SimpleTy) {
16552 default: return SDValue();
16555 if (!Subtarget->hasFp256())
16557 if (!Subtarget->hasInt256()) {
16558 // needs to be split
16559 unsigned NumElems = VT.getVectorNumElements();
16561 // Extract the LHS vectors
16562 SDValue LHS = Op.getOperand(0);
16563 SDValue LHS1 = Extract128BitVector(LHS, 0, DAG, dl);
16564 SDValue LHS2 = Extract128BitVector(LHS, NumElems/2, DAG, dl);
16566 MVT EltVT = VT.getVectorElementType();
16567 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
16569 EVT ExtraEltVT = ExtraVT.getVectorElementType();
16570 unsigned ExtraNumElems = ExtraVT.getVectorNumElements();
16571 ExtraVT = EVT::getVectorVT(*DAG.getContext(), ExtraEltVT,
16573 SDValue Extra = DAG.getValueType(ExtraVT);
16575 LHS1 = DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, Extra);
16576 LHS2 = DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, Extra);
16578 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, LHS1, LHS2);
16583 SDValue Op0 = Op.getOperand(0);
16584 SDValue Op00 = Op0.getOperand(0);
16586 // Hopefully, this VECTOR_SHUFFLE is just a VZEXT.
16587 if (Op0.getOpcode() == ISD::BITCAST &&
16588 Op00.getOpcode() == ISD::VECTOR_SHUFFLE) {
16589 // (sext (vzext x)) -> (vsext x)
16590 Tmp1 = LowerVectorIntExtend(Op00, Subtarget, DAG);
16591 if (Tmp1.getNode()) {
16592 EVT ExtraEltVT = ExtraVT.getVectorElementType();
16593 // This folding is only valid when the in-reg type is a vector of i8,
16595 if (ExtraEltVT == MVT::i8 || ExtraEltVT == MVT::i16 ||
16596 ExtraEltVT == MVT::i32) {
16597 SDValue Tmp1Op0 = Tmp1.getOperand(0);
16598 assert(Tmp1Op0.getOpcode() == X86ISD::VZEXT &&
16599 "This optimization is invalid without a VZEXT.");
16600 return DAG.getNode(X86ISD::VSEXT, dl, VT, Tmp1Op0.getOperand(0));
16606 // If the above didn't work, then just use Shift-Left + Shift-Right.
16607 Tmp1 = getTargetVShiftByConstNode(X86ISD::VSHLI, dl, VT, Op0, BitsDiff,
16609 return getTargetVShiftByConstNode(X86ISD::VSRAI, dl, VT, Tmp1, BitsDiff,
16615 static SDValue LowerATOMIC_FENCE(SDValue Op, const X86Subtarget *Subtarget,
16616 SelectionDAG &DAG) {
16618 AtomicOrdering FenceOrdering = static_cast<AtomicOrdering>(
16619 cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue());
16620 SynchronizationScope FenceScope = static_cast<SynchronizationScope>(
16621 cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue());
16623 // The only fence that needs an instruction is a sequentially-consistent
16624 // cross-thread fence.
16625 if (FenceOrdering == SequentiallyConsistent && FenceScope == CrossThread) {
16626 // Use mfence if we have SSE2 or we're on x86-64 (even if we asked for
16627 // no-sse2). There isn't any reason to disable it if the target processor
16629 if (Subtarget->hasSSE2() || Subtarget->is64Bit())
16630 return DAG.getNode(X86ISD::MFENCE, dl, MVT::Other, Op.getOperand(0));
16632 SDValue Chain = Op.getOperand(0);
16633 SDValue Zero = DAG.getConstant(0, MVT::i32);
16635 DAG.getRegister(X86::ESP, MVT::i32), // Base
16636 DAG.getTargetConstant(1, MVT::i8), // Scale
16637 DAG.getRegister(0, MVT::i32), // Index
16638 DAG.getTargetConstant(0, MVT::i32), // Disp
16639 DAG.getRegister(0, MVT::i32), // Segment.
16643 SDNode *Res = DAG.getMachineNode(X86::OR32mrLocked, dl, MVT::Other, Ops);
16644 return SDValue(Res, 0);
16647 // MEMBARRIER is a compiler barrier; it codegens to a no-op.
16648 return DAG.getNode(X86ISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0));
16651 static SDValue LowerCMP_SWAP(SDValue Op, const X86Subtarget *Subtarget,
16652 SelectionDAG &DAG) {
16653 MVT T = Op.getSimpleValueType();
16657 switch(T.SimpleTy) {
16658 default: llvm_unreachable("Invalid value type!");
16659 case MVT::i8: Reg = X86::AL; size = 1; break;
16660 case MVT::i16: Reg = X86::AX; size = 2; break;
16661 case MVT::i32: Reg = X86::EAX; size = 4; break;
16663 assert(Subtarget->is64Bit() && "Node not type legal!");
16664 Reg = X86::RAX; size = 8;
16667 SDValue cpIn = DAG.getCopyToReg(Op.getOperand(0), DL, Reg,
16668 Op.getOperand(2), SDValue());
16669 SDValue Ops[] = { cpIn.getValue(0),
16672 DAG.getTargetConstant(size, MVT::i8),
16673 cpIn.getValue(1) };
16674 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
16675 MachineMemOperand *MMO = cast<AtomicSDNode>(Op)->getMemOperand();
16676 SDValue Result = DAG.getMemIntrinsicNode(X86ISD::LCMPXCHG_DAG, DL, Tys,
16680 DAG.getCopyFromReg(Result.getValue(0), DL, Reg, T, Result.getValue(1));
16681 SDValue EFLAGS = DAG.getCopyFromReg(cpOut.getValue(1), DL, X86::EFLAGS,
16682 MVT::i32, cpOut.getValue(2));
16683 SDValue Success = DAG.getNode(X86ISD::SETCC, DL, Op->getValueType(1),
16684 DAG.getConstant(X86::COND_E, MVT::i8), EFLAGS);
16686 DAG.ReplaceAllUsesOfValueWith(Op.getValue(0), cpOut);
16687 DAG.ReplaceAllUsesOfValueWith(Op.getValue(1), Success);
16688 DAG.ReplaceAllUsesOfValueWith(Op.getValue(2), EFLAGS.getValue(1));
16692 static SDValue LowerBITCAST(SDValue Op, const X86Subtarget *Subtarget,
16693 SelectionDAG &DAG) {
16694 MVT SrcVT = Op.getOperand(0).getSimpleValueType();
16695 MVT DstVT = Op.getSimpleValueType();
16697 if (SrcVT == MVT::v2i32 || SrcVT == MVT::v4i16 || SrcVT == MVT::v8i8) {
16698 assert(Subtarget->hasSSE2() && "Requires at least SSE2!");
16699 if (DstVT != MVT::f64)
16700 // This conversion needs to be expanded.
16703 SDValue InVec = Op->getOperand(0);
16705 unsigned NumElts = SrcVT.getVectorNumElements();
16706 EVT SVT = SrcVT.getVectorElementType();
16708 // Widen the vector in input in the case of MVT::v2i32.
16709 // Example: from MVT::v2i32 to MVT::v4i32.
16710 SmallVector<SDValue, 16> Elts;
16711 for (unsigned i = 0, e = NumElts; i != e; ++i)
16712 Elts.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, SVT, InVec,
16713 DAG.getIntPtrConstant(i)));
16715 // Explicitly mark the extra elements as Undef.
16716 SDValue Undef = DAG.getUNDEF(SVT);
16717 for (unsigned i = NumElts, e = NumElts * 2; i != e; ++i)
16718 Elts.push_back(Undef);
16720 EVT NewVT = EVT::getVectorVT(*DAG.getContext(), SVT, NumElts * 2);
16721 SDValue BV = DAG.getNode(ISD::BUILD_VECTOR, dl, NewVT, Elts);
16722 SDValue ToV2F64 = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, BV);
16723 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, ToV2F64,
16724 DAG.getIntPtrConstant(0));
16727 assert(Subtarget->is64Bit() && !Subtarget->hasSSE2() &&
16728 Subtarget->hasMMX() && "Unexpected custom BITCAST");
16729 assert((DstVT == MVT::i64 ||
16730 (DstVT.isVector() && DstVT.getSizeInBits()==64)) &&
16731 "Unexpected custom BITCAST");
16732 // i64 <=> MMX conversions are Legal.
16733 if (SrcVT==MVT::i64 && DstVT.isVector())
16735 if (DstVT==MVT::i64 && SrcVT.isVector())
16737 // MMX <=> MMX conversions are Legal.
16738 if (SrcVT.isVector() && DstVT.isVector())
16740 // All other conversions need to be expanded.
16744 static SDValue LowerLOAD_SUB(SDValue Op, SelectionDAG &DAG) {
16745 SDNode *Node = Op.getNode();
16747 EVT T = Node->getValueType(0);
16748 SDValue negOp = DAG.getNode(ISD::SUB, dl, T,
16749 DAG.getConstant(0, T), Node->getOperand(2));
16750 return DAG.getAtomic(ISD::ATOMIC_LOAD_ADD, dl,
16751 cast<AtomicSDNode>(Node)->getMemoryVT(),
16752 Node->getOperand(0),
16753 Node->getOperand(1), negOp,
16754 cast<AtomicSDNode>(Node)->getMemOperand(),
16755 cast<AtomicSDNode>(Node)->getOrdering(),
16756 cast<AtomicSDNode>(Node)->getSynchScope());
16759 static SDValue LowerATOMIC_STORE(SDValue Op, SelectionDAG &DAG) {
16760 SDNode *Node = Op.getNode();
16762 EVT VT = cast<AtomicSDNode>(Node)->getMemoryVT();
16764 // Convert seq_cst store -> xchg
16765 // Convert wide store -> swap (-> cmpxchg8b/cmpxchg16b)
16766 // FIXME: On 32-bit, store -> fist or movq would be more efficient
16767 // (The only way to get a 16-byte store is cmpxchg16b)
16768 // FIXME: 16-byte ATOMIC_SWAP isn't actually hooked up at the moment.
16769 if (cast<AtomicSDNode>(Node)->getOrdering() == SequentiallyConsistent ||
16770 !DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
16771 SDValue Swap = DAG.getAtomic(ISD::ATOMIC_SWAP, dl,
16772 cast<AtomicSDNode>(Node)->getMemoryVT(),
16773 Node->getOperand(0),
16774 Node->getOperand(1), Node->getOperand(2),
16775 cast<AtomicSDNode>(Node)->getMemOperand(),
16776 cast<AtomicSDNode>(Node)->getOrdering(),
16777 cast<AtomicSDNode>(Node)->getSynchScope());
16778 return Swap.getValue(1);
16780 // Other atomic stores have a simple pattern.
16784 static SDValue LowerADDC_ADDE_SUBC_SUBE(SDValue Op, SelectionDAG &DAG) {
16785 EVT VT = Op.getNode()->getSimpleValueType(0);
16787 // Let legalize expand this if it isn't a legal type yet.
16788 if (!DAG.getTargetLoweringInfo().isTypeLegal(VT))
16791 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
16794 bool ExtraOp = false;
16795 switch (Op.getOpcode()) {
16796 default: llvm_unreachable("Invalid code");
16797 case ISD::ADDC: Opc = X86ISD::ADD; break;
16798 case ISD::ADDE: Opc = X86ISD::ADC; ExtraOp = true; break;
16799 case ISD::SUBC: Opc = X86ISD::SUB; break;
16800 case ISD::SUBE: Opc = X86ISD::SBB; ExtraOp = true; break;
16804 return DAG.getNode(Opc, SDLoc(Op), VTs, Op.getOperand(0),
16806 return DAG.getNode(Opc, SDLoc(Op), VTs, Op.getOperand(0),
16807 Op.getOperand(1), Op.getOperand(2));
16810 static SDValue LowerFSINCOS(SDValue Op, const X86Subtarget *Subtarget,
16811 SelectionDAG &DAG) {
16812 assert(Subtarget->isTargetDarwin() && Subtarget->is64Bit());
16814 // For MacOSX, we want to call an alternative entry point: __sincos_stret,
16815 // which returns the values as { float, float } (in XMM0) or
16816 // { double, double } (which is returned in XMM0, XMM1).
16818 SDValue Arg = Op.getOperand(0);
16819 EVT ArgVT = Arg.getValueType();
16820 Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
16822 TargetLowering::ArgListTy Args;
16823 TargetLowering::ArgListEntry Entry;
16827 Entry.isSExt = false;
16828 Entry.isZExt = false;
16829 Args.push_back(Entry);
16831 bool isF64 = ArgVT == MVT::f64;
16832 // Only optimize x86_64 for now. i386 is a bit messy. For f32,
16833 // the small struct {f32, f32} is returned in (eax, edx). For f64,
16834 // the results are returned via SRet in memory.
16835 const char *LibcallName = isF64 ? "__sincos_stret" : "__sincosf_stret";
16836 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
16837 SDValue Callee = DAG.getExternalSymbol(LibcallName, TLI.getPointerTy());
16839 Type *RetTy = isF64
16840 ? (Type*)StructType::get(ArgTy, ArgTy, NULL)
16841 : (Type*)VectorType::get(ArgTy, 4);
16843 TargetLowering::CallLoweringInfo CLI(DAG);
16844 CLI.setDebugLoc(dl).setChain(DAG.getEntryNode())
16845 .setCallee(CallingConv::C, RetTy, Callee, std::move(Args), 0);
16847 std::pair<SDValue, SDValue> CallResult = TLI.LowerCallTo(CLI);
16850 // Returned in xmm0 and xmm1.
16851 return CallResult.first;
16853 // Returned in bits 0:31 and 32:64 xmm0.
16854 SDValue SinVal = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, ArgVT,
16855 CallResult.first, DAG.getIntPtrConstant(0));
16856 SDValue CosVal = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, ArgVT,
16857 CallResult.first, DAG.getIntPtrConstant(1));
16858 SDVTList Tys = DAG.getVTList(ArgVT, ArgVT);
16859 return DAG.getNode(ISD::MERGE_VALUES, dl, Tys, SinVal, CosVal);
16862 /// LowerOperation - Provide custom lowering hooks for some operations.
16864 SDValue X86TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
16865 switch (Op.getOpcode()) {
16866 default: llvm_unreachable("Should not custom lower this!");
16867 case ISD::SIGN_EXTEND_INREG: return LowerSIGN_EXTEND_INREG(Op,DAG);
16868 case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, Subtarget, DAG);
16869 case ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS:
16870 return LowerCMP_SWAP(Op, Subtarget, DAG);
16871 case ISD::ATOMIC_LOAD_SUB: return LowerLOAD_SUB(Op,DAG);
16872 case ISD::ATOMIC_STORE: return LowerATOMIC_STORE(Op,DAG);
16873 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG);
16874 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
16875 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
16876 case ISD::VSELECT: return LowerVSELECT(Op, DAG);
16877 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
16878 case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
16879 case ISD::EXTRACT_SUBVECTOR: return LowerEXTRACT_SUBVECTOR(Op,Subtarget,DAG);
16880 case ISD::INSERT_SUBVECTOR: return LowerINSERT_SUBVECTOR(Op, Subtarget,DAG);
16881 case ISD::SCALAR_TO_VECTOR: return LowerSCALAR_TO_VECTOR(Op, DAG);
16882 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
16883 case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
16884 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
16885 case ISD::ExternalSymbol: return LowerExternalSymbol(Op, DAG);
16886 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
16887 case ISD::SHL_PARTS:
16888 case ISD::SRA_PARTS:
16889 case ISD::SRL_PARTS: return LowerShiftParts(Op, DAG);
16890 case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
16891 case ISD::UINT_TO_FP: return LowerUINT_TO_FP(Op, DAG);
16892 case ISD::TRUNCATE: return LowerTRUNCATE(Op, DAG);
16893 case ISD::ZERO_EXTEND: return LowerZERO_EXTEND(Op, Subtarget, DAG);
16894 case ISD::SIGN_EXTEND: return LowerSIGN_EXTEND(Op, Subtarget, DAG);
16895 case ISD::ANY_EXTEND: return LowerANY_EXTEND(Op, Subtarget, DAG);
16896 case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
16897 case ISD::FP_TO_UINT: return LowerFP_TO_UINT(Op, DAG);
16898 case ISD::FP_EXTEND: return LowerFP_EXTEND(Op, DAG);
16899 case ISD::LOAD: return LowerExtendedLoad(Op, Subtarget, DAG);
16900 case ISD::FABS: return LowerFABS(Op, DAG);
16901 case ISD::FNEG: return LowerFNEG(Op, DAG);
16902 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
16903 case ISD::FGETSIGN: return LowerFGETSIGN(Op, DAG);
16904 case ISD::SETCC: return LowerSETCC(Op, DAG);
16905 case ISD::SELECT: return LowerSELECT(Op, DAG);
16906 case ISD::BRCOND: return LowerBRCOND(Op, DAG);
16907 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
16908 case ISD::VASTART: return LowerVASTART(Op, DAG);
16909 case ISD::VAARG: return LowerVAARG(Op, DAG);
16910 case ISD::VACOPY: return LowerVACOPY(Op, Subtarget, DAG);
16911 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
16912 case ISD::INTRINSIC_VOID:
16913 case ISD::INTRINSIC_W_CHAIN: return LowerINTRINSIC_W_CHAIN(Op, Subtarget, DAG);
16914 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
16915 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
16916 case ISD::FRAME_TO_ARGS_OFFSET:
16917 return LowerFRAME_TO_ARGS_OFFSET(Op, DAG);
16918 case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
16919 case ISD::EH_RETURN: return LowerEH_RETURN(Op, DAG);
16920 case ISD::EH_SJLJ_SETJMP: return lowerEH_SJLJ_SETJMP(Op, DAG);
16921 case ISD::EH_SJLJ_LONGJMP: return lowerEH_SJLJ_LONGJMP(Op, DAG);
16922 case ISD::INIT_TRAMPOLINE: return LowerINIT_TRAMPOLINE(Op, DAG);
16923 case ISD::ADJUST_TRAMPOLINE: return LowerADJUST_TRAMPOLINE(Op, DAG);
16924 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
16925 case ISD::CTLZ: return LowerCTLZ(Op, DAG);
16926 case ISD::CTLZ_ZERO_UNDEF: return LowerCTLZ_ZERO_UNDEF(Op, DAG);
16927 case ISD::CTTZ: return LowerCTTZ(Op, DAG);
16928 case ISD::MUL: return LowerMUL(Op, Subtarget, DAG);
16929 case ISD::UMUL_LOHI:
16930 case ISD::SMUL_LOHI: return LowerMUL_LOHI(Op, Subtarget, DAG);
16933 case ISD::SHL: return LowerShift(Op, Subtarget, DAG);
16939 case ISD::UMULO: return LowerXALUO(Op, DAG);
16940 case ISD::READCYCLECOUNTER: return LowerREADCYCLECOUNTER(Op, Subtarget,DAG);
16941 case ISD::BITCAST: return LowerBITCAST(Op, Subtarget, DAG);
16945 case ISD::SUBE: return LowerADDC_ADDE_SUBC_SUBE(Op, DAG);
16946 case ISD::ADD: return LowerADD(Op, DAG);
16947 case ISD::SUB: return LowerSUB(Op, DAG);
16948 case ISD::FSINCOS: return LowerFSINCOS(Op, Subtarget, DAG);
16952 static void ReplaceATOMIC_LOAD(SDNode *Node,
16953 SmallVectorImpl<SDValue> &Results,
16954 SelectionDAG &DAG) {
16956 EVT VT = cast<AtomicSDNode>(Node)->getMemoryVT();
16958 // Convert wide load -> cmpxchg8b/cmpxchg16b
16959 // FIXME: On 32-bit, load -> fild or movq would be more efficient
16960 // (The only way to get a 16-byte load is cmpxchg16b)
16961 // FIXME: 16-byte ATOMIC_CMP_SWAP isn't actually hooked up at the moment.
16962 SDValue Zero = DAG.getConstant(0, VT);
16963 SDVTList VTs = DAG.getVTList(VT, MVT::i1, MVT::Other);
16965 DAG.getAtomicCmpSwap(ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS, dl, VT, VTs,
16966 Node->getOperand(0), Node->getOperand(1), Zero, Zero,
16967 cast<AtomicSDNode>(Node)->getMemOperand(),
16968 cast<AtomicSDNode>(Node)->getOrdering(),
16969 cast<AtomicSDNode>(Node)->getOrdering(),
16970 cast<AtomicSDNode>(Node)->getSynchScope());
16971 Results.push_back(Swap.getValue(0));
16972 Results.push_back(Swap.getValue(2));
16975 /// ReplaceNodeResults - Replace a node with an illegal result type
16976 /// with a new node built out of custom code.
16977 void X86TargetLowering::ReplaceNodeResults(SDNode *N,
16978 SmallVectorImpl<SDValue>&Results,
16979 SelectionDAG &DAG) const {
16981 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
16982 switch (N->getOpcode()) {
16984 llvm_unreachable("Do not know how to custom type legalize this operation!");
16985 case ISD::SIGN_EXTEND_INREG:
16990 // We don't want to expand or promote these.
16997 case ISD::UDIVREM: {
16998 SDValue V = LowerWin64_i128OP(SDValue(N,0), DAG);
16999 Results.push_back(V);
17002 case ISD::FP_TO_SINT:
17003 case ISD::FP_TO_UINT: {
17004 bool IsSigned = N->getOpcode() == ISD::FP_TO_SINT;
17006 if (!IsSigned && !isIntegerTypeFTOL(SDValue(N, 0).getValueType()))
17009 std::pair<SDValue,SDValue> Vals =
17010 FP_TO_INTHelper(SDValue(N, 0), DAG, IsSigned, /*IsReplace=*/ true);
17011 SDValue FIST = Vals.first, StackSlot = Vals.second;
17012 if (FIST.getNode()) {
17013 EVT VT = N->getValueType(0);
17014 // Return a load from the stack slot.
17015 if (StackSlot.getNode())
17016 Results.push_back(DAG.getLoad(VT, dl, FIST, StackSlot,
17017 MachinePointerInfo(),
17018 false, false, false, 0));
17020 Results.push_back(FIST);
17024 case ISD::UINT_TO_FP: {
17025 assert(Subtarget->hasSSE2() && "Requires at least SSE2!");
17026 if (N->getOperand(0).getValueType() != MVT::v2i32 ||
17027 N->getValueType(0) != MVT::v2f32)
17029 SDValue ZExtIn = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v2i64,
17031 SDValue Bias = DAG.getConstantFP(BitsToDouble(0x4330000000000000ULL),
17033 SDValue VBias = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v2f64, Bias, Bias);
17034 SDValue Or = DAG.getNode(ISD::OR, dl, MVT::v2i64, ZExtIn,
17035 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, VBias));
17036 Or = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Or);
17037 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::v2f64, Or, VBias);
17038 Results.push_back(DAG.getNode(X86ISD::VFPROUND, dl, MVT::v4f32, Sub));
17041 case ISD::FP_ROUND: {
17042 if (!TLI.isTypeLegal(N->getOperand(0).getValueType()))
17044 SDValue V = DAG.getNode(X86ISD::VFPROUND, dl, MVT::v4f32, N->getOperand(0));
17045 Results.push_back(V);
17048 case ISD::INTRINSIC_W_CHAIN: {
17049 unsigned IntNo = cast<ConstantSDNode>(N->getOperand(1))->getZExtValue();
17051 default : llvm_unreachable("Do not know how to custom type "
17052 "legalize this intrinsic operation!");
17053 case Intrinsic::x86_rdtsc:
17054 return getReadTimeStampCounter(N, dl, X86ISD::RDTSC_DAG, DAG, Subtarget,
17056 case Intrinsic::x86_rdtscp:
17057 return getReadTimeStampCounter(N, dl, X86ISD::RDTSCP_DAG, DAG, Subtarget,
17059 case Intrinsic::x86_rdpmc:
17060 return getReadPerformanceCounter(N, dl, DAG, Subtarget, Results);
17063 case ISD::READCYCLECOUNTER: {
17064 return getReadTimeStampCounter(N, dl, X86ISD::RDTSC_DAG, DAG, Subtarget,
17067 case ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS: {
17068 EVT T = N->getValueType(0);
17069 assert((T == MVT::i64 || T == MVT::i128) && "can only expand cmpxchg pair");
17070 bool Regs64bit = T == MVT::i128;
17071 EVT HalfT = Regs64bit ? MVT::i64 : MVT::i32;
17072 SDValue cpInL, cpInH;
17073 cpInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(2),
17074 DAG.getConstant(0, HalfT));
17075 cpInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(2),
17076 DAG.getConstant(1, HalfT));
17077 cpInL = DAG.getCopyToReg(N->getOperand(0), dl,
17078 Regs64bit ? X86::RAX : X86::EAX,
17080 cpInH = DAG.getCopyToReg(cpInL.getValue(0), dl,
17081 Regs64bit ? X86::RDX : X86::EDX,
17082 cpInH, cpInL.getValue(1));
17083 SDValue swapInL, swapInH;
17084 swapInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(3),
17085 DAG.getConstant(0, HalfT));
17086 swapInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(3),
17087 DAG.getConstant(1, HalfT));
17088 swapInL = DAG.getCopyToReg(cpInH.getValue(0), dl,
17089 Regs64bit ? X86::RBX : X86::EBX,
17090 swapInL, cpInH.getValue(1));
17091 swapInH = DAG.getCopyToReg(swapInL.getValue(0), dl,
17092 Regs64bit ? X86::RCX : X86::ECX,
17093 swapInH, swapInL.getValue(1));
17094 SDValue Ops[] = { swapInH.getValue(0),
17096 swapInH.getValue(1) };
17097 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
17098 MachineMemOperand *MMO = cast<AtomicSDNode>(N)->getMemOperand();
17099 unsigned Opcode = Regs64bit ? X86ISD::LCMPXCHG16_DAG :
17100 X86ISD::LCMPXCHG8_DAG;
17101 SDValue Result = DAG.getMemIntrinsicNode(Opcode, dl, Tys, Ops, T, MMO);
17102 SDValue cpOutL = DAG.getCopyFromReg(Result.getValue(0), dl,
17103 Regs64bit ? X86::RAX : X86::EAX,
17104 HalfT, Result.getValue(1));
17105 SDValue cpOutH = DAG.getCopyFromReg(cpOutL.getValue(1), dl,
17106 Regs64bit ? X86::RDX : X86::EDX,
17107 HalfT, cpOutL.getValue(2));
17108 SDValue OpsF[] = { cpOutL.getValue(0), cpOutH.getValue(0)};
17110 SDValue EFLAGS = DAG.getCopyFromReg(cpOutH.getValue(1), dl, X86::EFLAGS,
17111 MVT::i32, cpOutH.getValue(2));
17113 DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
17114 DAG.getConstant(X86::COND_E, MVT::i8), EFLAGS);
17115 Success = DAG.getZExtOrTrunc(Success, dl, N->getValueType(1));
17117 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, T, OpsF));
17118 Results.push_back(Success);
17119 Results.push_back(EFLAGS.getValue(1));
17122 case ISD::ATOMIC_SWAP:
17123 case ISD::ATOMIC_LOAD_ADD:
17124 case ISD::ATOMIC_LOAD_SUB:
17125 case ISD::ATOMIC_LOAD_AND:
17126 case ISD::ATOMIC_LOAD_OR:
17127 case ISD::ATOMIC_LOAD_XOR:
17128 case ISD::ATOMIC_LOAD_NAND:
17129 case ISD::ATOMIC_LOAD_MIN:
17130 case ISD::ATOMIC_LOAD_MAX:
17131 case ISD::ATOMIC_LOAD_UMIN:
17132 case ISD::ATOMIC_LOAD_UMAX:
17133 // Delegate to generic TypeLegalization. Situations we can really handle
17134 // should have already been dealt with by X86AtomicExpandPass.cpp.
17136 case ISD::ATOMIC_LOAD: {
17137 ReplaceATOMIC_LOAD(N, Results, DAG);
17140 case ISD::BITCAST: {
17141 assert(Subtarget->hasSSE2() && "Requires at least SSE2!");
17142 EVT DstVT = N->getValueType(0);
17143 EVT SrcVT = N->getOperand(0)->getValueType(0);
17145 if (SrcVT != MVT::f64 ||
17146 (DstVT != MVT::v2i32 && DstVT != MVT::v4i16 && DstVT != MVT::v8i8))
17149 unsigned NumElts = DstVT.getVectorNumElements();
17150 EVT SVT = DstVT.getVectorElementType();
17151 EVT WiderVT = EVT::getVectorVT(*DAG.getContext(), SVT, NumElts * 2);
17152 SDValue Expanded = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
17153 MVT::v2f64, N->getOperand(0));
17154 SDValue ToVecInt = DAG.getNode(ISD::BITCAST, dl, WiderVT, Expanded);
17156 if (ExperimentalVectorWideningLegalization) {
17157 // If we are legalizing vectors by widening, we already have the desired
17158 // legal vector type, just return it.
17159 Results.push_back(ToVecInt);
17163 SmallVector<SDValue, 8> Elts;
17164 for (unsigned i = 0, e = NumElts; i != e; ++i)
17165 Elts.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, SVT,
17166 ToVecInt, DAG.getIntPtrConstant(i)));
17168 Results.push_back(DAG.getNode(ISD::BUILD_VECTOR, dl, DstVT, Elts));
17173 const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const {
17175 default: return nullptr;
17176 case X86ISD::BSF: return "X86ISD::BSF";
17177 case X86ISD::BSR: return "X86ISD::BSR";
17178 case X86ISD::SHLD: return "X86ISD::SHLD";
17179 case X86ISD::SHRD: return "X86ISD::SHRD";
17180 case X86ISD::FAND: return "X86ISD::FAND";
17181 case X86ISD::FANDN: return "X86ISD::FANDN";
17182 case X86ISD::FOR: return "X86ISD::FOR";
17183 case X86ISD::FXOR: return "X86ISD::FXOR";
17184 case X86ISD::FSRL: return "X86ISD::FSRL";
17185 case X86ISD::FILD: return "X86ISD::FILD";
17186 case X86ISD::FILD_FLAG: return "X86ISD::FILD_FLAG";
17187 case X86ISD::FP_TO_INT16_IN_MEM: return "X86ISD::FP_TO_INT16_IN_MEM";
17188 case X86ISD::FP_TO_INT32_IN_MEM: return "X86ISD::FP_TO_INT32_IN_MEM";
17189 case X86ISD::FP_TO_INT64_IN_MEM: return "X86ISD::FP_TO_INT64_IN_MEM";
17190 case X86ISD::FLD: return "X86ISD::FLD";
17191 case X86ISD::FST: return "X86ISD::FST";
17192 case X86ISD::CALL: return "X86ISD::CALL";
17193 case X86ISD::RDTSC_DAG: return "X86ISD::RDTSC_DAG";
17194 case X86ISD::RDTSCP_DAG: return "X86ISD::RDTSCP_DAG";
17195 case X86ISD::RDPMC_DAG: return "X86ISD::RDPMC_DAG";
17196 case X86ISD::BT: return "X86ISD::BT";
17197 case X86ISD::CMP: return "X86ISD::CMP";
17198 case X86ISD::COMI: return "X86ISD::COMI";
17199 case X86ISD::UCOMI: return "X86ISD::UCOMI";
17200 case X86ISD::CMPM: return "X86ISD::CMPM";
17201 case X86ISD::CMPMU: return "X86ISD::CMPMU";
17202 case X86ISD::SETCC: return "X86ISD::SETCC";
17203 case X86ISD::SETCC_CARRY: return "X86ISD::SETCC_CARRY";
17204 case X86ISD::FSETCC: return "X86ISD::FSETCC";
17205 case X86ISD::CMOV: return "X86ISD::CMOV";
17206 case X86ISD::BRCOND: return "X86ISD::BRCOND";
17207 case X86ISD::RET_FLAG: return "X86ISD::RET_FLAG";
17208 case X86ISD::REP_STOS: return "X86ISD::REP_STOS";
17209 case X86ISD::REP_MOVS: return "X86ISD::REP_MOVS";
17210 case X86ISD::GlobalBaseReg: return "X86ISD::GlobalBaseReg";
17211 case X86ISD::Wrapper: return "X86ISD::Wrapper";
17212 case X86ISD::WrapperRIP: return "X86ISD::WrapperRIP";
17213 case X86ISD::PEXTRB: return "X86ISD::PEXTRB";
17214 case X86ISD::PEXTRW: return "X86ISD::PEXTRW";
17215 case X86ISD::INSERTPS: return "X86ISD::INSERTPS";
17216 case X86ISD::PINSRB: return "X86ISD::PINSRB";
17217 case X86ISD::PINSRW: return "X86ISD::PINSRW";
17218 case X86ISD::PSHUFB: return "X86ISD::PSHUFB";
17219 case X86ISD::ANDNP: return "X86ISD::ANDNP";
17220 case X86ISD::PSIGN: return "X86ISD::PSIGN";
17221 case X86ISD::BLENDV: return "X86ISD::BLENDV";
17222 case X86ISD::BLENDI: return "X86ISD::BLENDI";
17223 case X86ISD::SUBUS: return "X86ISD::SUBUS";
17224 case X86ISD::HADD: return "X86ISD::HADD";
17225 case X86ISD::HSUB: return "X86ISD::HSUB";
17226 case X86ISD::FHADD: return "X86ISD::FHADD";
17227 case X86ISD::FHSUB: return "X86ISD::FHSUB";
17228 case X86ISD::UMAX: return "X86ISD::UMAX";
17229 case X86ISD::UMIN: return "X86ISD::UMIN";
17230 case X86ISD::SMAX: return "X86ISD::SMAX";
17231 case X86ISD::SMIN: return "X86ISD::SMIN";
17232 case X86ISD::FMAX: return "X86ISD::FMAX";
17233 case X86ISD::FMIN: return "X86ISD::FMIN";
17234 case X86ISD::FMAXC: return "X86ISD::FMAXC";
17235 case X86ISD::FMINC: return "X86ISD::FMINC";
17236 case X86ISD::FRSQRT: return "X86ISD::FRSQRT";
17237 case X86ISD::FRCP: return "X86ISD::FRCP";
17238 case X86ISD::TLSADDR: return "X86ISD::TLSADDR";
17239 case X86ISD::TLSBASEADDR: return "X86ISD::TLSBASEADDR";
17240 case X86ISD::TLSCALL: return "X86ISD::TLSCALL";
17241 case X86ISD::EH_SJLJ_SETJMP: return "X86ISD::EH_SJLJ_SETJMP";
17242 case X86ISD::EH_SJLJ_LONGJMP: return "X86ISD::EH_SJLJ_LONGJMP";
17243 case X86ISD::EH_RETURN: return "X86ISD::EH_RETURN";
17244 case X86ISD::TC_RETURN: return "X86ISD::TC_RETURN";
17245 case X86ISD::FNSTCW16m: return "X86ISD::FNSTCW16m";
17246 case X86ISD::FNSTSW16r: return "X86ISD::FNSTSW16r";
17247 case X86ISD::LCMPXCHG_DAG: return "X86ISD::LCMPXCHG_DAG";
17248 case X86ISD::LCMPXCHG8_DAG: return "X86ISD::LCMPXCHG8_DAG";
17249 case X86ISD::LCMPXCHG16_DAG: return "X86ISD::LCMPXCHG16_DAG";
17250 case X86ISD::VZEXT_MOVL: return "X86ISD::VZEXT_MOVL";
17251 case X86ISD::VZEXT_LOAD: return "X86ISD::VZEXT_LOAD";
17252 case X86ISD::VZEXT: return "X86ISD::VZEXT";
17253 case X86ISD::VSEXT: return "X86ISD::VSEXT";
17254 case X86ISD::VTRUNC: return "X86ISD::VTRUNC";
17255 case X86ISD::VTRUNCM: return "X86ISD::VTRUNCM";
17256 case X86ISD::VINSERT: return "X86ISD::VINSERT";
17257 case X86ISD::VFPEXT: return "X86ISD::VFPEXT";
17258 case X86ISD::VFPROUND: return "X86ISD::VFPROUND";
17259 case X86ISD::VSHLDQ: return "X86ISD::VSHLDQ";
17260 case X86ISD::VSRLDQ: return "X86ISD::VSRLDQ";
17261 case X86ISD::VSHL: return "X86ISD::VSHL";
17262 case X86ISD::VSRL: return "X86ISD::VSRL";
17263 case X86ISD::VSRA: return "X86ISD::VSRA";
17264 case X86ISD::VSHLI: return "X86ISD::VSHLI";
17265 case X86ISD::VSRLI: return "X86ISD::VSRLI";
17266 case X86ISD::VSRAI: return "X86ISD::VSRAI";
17267 case X86ISD::CMPP: return "X86ISD::CMPP";
17268 case X86ISD::PCMPEQ: return "X86ISD::PCMPEQ";
17269 case X86ISD::PCMPGT: return "X86ISD::PCMPGT";
17270 case X86ISD::PCMPEQM: return "X86ISD::PCMPEQM";
17271 case X86ISD::PCMPGTM: return "X86ISD::PCMPGTM";
17272 case X86ISD::ADD: return "X86ISD::ADD";
17273 case X86ISD::SUB: return "X86ISD::SUB";
17274 case X86ISD::ADC: return "X86ISD::ADC";
17275 case X86ISD::SBB: return "X86ISD::SBB";
17276 case X86ISD::SMUL: return "X86ISD::SMUL";
17277 case X86ISD::UMUL: return "X86ISD::UMUL";
17278 case X86ISD::INC: return "X86ISD::INC";
17279 case X86ISD::DEC: return "X86ISD::DEC";
17280 case X86ISD::OR: return "X86ISD::OR";
17281 case X86ISD::XOR: return "X86ISD::XOR";
17282 case X86ISD::AND: return "X86ISD::AND";
17283 case X86ISD::BEXTR: return "X86ISD::BEXTR";
17284 case X86ISD::MUL_IMM: return "X86ISD::MUL_IMM";
17285 case X86ISD::PTEST: return "X86ISD::PTEST";
17286 case X86ISD::TESTP: return "X86ISD::TESTP";
17287 case X86ISD::TESTM: return "X86ISD::TESTM";
17288 case X86ISD::TESTNM: return "X86ISD::TESTNM";
17289 case X86ISD::KORTEST: return "X86ISD::KORTEST";
17290 case X86ISD::PACKSS: return "X86ISD::PACKSS";
17291 case X86ISD::PACKUS: return "X86ISD::PACKUS";
17292 case X86ISD::PALIGNR: return "X86ISD::PALIGNR";
17293 case X86ISD::VALIGN: return "X86ISD::VALIGN";
17294 case X86ISD::PSHUFD: return "X86ISD::PSHUFD";
17295 case X86ISD::PSHUFHW: return "X86ISD::PSHUFHW";
17296 case X86ISD::PSHUFLW: return "X86ISD::PSHUFLW";
17297 case X86ISD::SHUFP: return "X86ISD::SHUFP";
17298 case X86ISD::MOVLHPS: return "X86ISD::MOVLHPS";
17299 case X86ISD::MOVLHPD: return "X86ISD::MOVLHPD";
17300 case X86ISD::MOVHLPS: return "X86ISD::MOVHLPS";
17301 case X86ISD::MOVLPS: return "X86ISD::MOVLPS";
17302 case X86ISD::MOVLPD: return "X86ISD::MOVLPD";
17303 case X86ISD::MOVDDUP: return "X86ISD::MOVDDUP";
17304 case X86ISD::MOVSHDUP: return "X86ISD::MOVSHDUP";
17305 case X86ISD::MOVSLDUP: return "X86ISD::MOVSLDUP";
17306 case X86ISD::MOVSD: return "X86ISD::MOVSD";
17307 case X86ISD::MOVSS: return "X86ISD::MOVSS";
17308 case X86ISD::UNPCKL: return "X86ISD::UNPCKL";
17309 case X86ISD::UNPCKH: return "X86ISD::UNPCKH";
17310 case X86ISD::VBROADCAST: return "X86ISD::VBROADCAST";
17311 case X86ISD::VBROADCASTM: return "X86ISD::VBROADCASTM";
17312 case X86ISD::VEXTRACT: return "X86ISD::VEXTRACT";
17313 case X86ISD::VPERMILP: return "X86ISD::VPERMILP";
17314 case X86ISD::VPERM2X128: return "X86ISD::VPERM2X128";
17315 case X86ISD::VPERMV: return "X86ISD::VPERMV";
17316 case X86ISD::VPERMV3: return "X86ISD::VPERMV3";
17317 case X86ISD::VPERMIV3: return "X86ISD::VPERMIV3";
17318 case X86ISD::VPERMI: return "X86ISD::VPERMI";
17319 case X86ISD::PMULUDQ: return "X86ISD::PMULUDQ";
17320 case X86ISD::PMULDQ: return "X86ISD::PMULDQ";
17321 case X86ISD::VASTART_SAVE_XMM_REGS: return "X86ISD::VASTART_SAVE_XMM_REGS";
17322 case X86ISD::VAARG_64: return "X86ISD::VAARG_64";
17323 case X86ISD::WIN_ALLOCA: return "X86ISD::WIN_ALLOCA";
17324 case X86ISD::MEMBARRIER: return "X86ISD::MEMBARRIER";
17325 case X86ISD::SEG_ALLOCA: return "X86ISD::SEG_ALLOCA";
17326 case X86ISD::WIN_FTOL: return "X86ISD::WIN_FTOL";
17327 case X86ISD::SAHF: return "X86ISD::SAHF";
17328 case X86ISD::RDRAND: return "X86ISD::RDRAND";
17329 case X86ISD::RDSEED: return "X86ISD::RDSEED";
17330 case X86ISD::FMADD: return "X86ISD::FMADD";
17331 case X86ISD::FMSUB: return "X86ISD::FMSUB";
17332 case X86ISD::FNMADD: return "X86ISD::FNMADD";
17333 case X86ISD::FNMSUB: return "X86ISD::FNMSUB";
17334 case X86ISD::FMADDSUB: return "X86ISD::FMADDSUB";
17335 case X86ISD::FMSUBADD: return "X86ISD::FMSUBADD";
17336 case X86ISD::PCMPESTRI: return "X86ISD::PCMPESTRI";
17337 case X86ISD::PCMPISTRI: return "X86ISD::PCMPISTRI";
17338 case X86ISD::XTEST: return "X86ISD::XTEST";
17342 // isLegalAddressingMode - Return true if the addressing mode represented
17343 // by AM is legal for this target, for a load/store of the specified type.
17344 bool X86TargetLowering::isLegalAddressingMode(const AddrMode &AM,
17346 // X86 supports extremely general addressing modes.
17347 CodeModel::Model M = getTargetMachine().getCodeModel();
17348 Reloc::Model R = getTargetMachine().getRelocationModel();
17350 // X86 allows a sign-extended 32-bit immediate field as a displacement.
17351 if (!X86::isOffsetSuitableForCodeModel(AM.BaseOffs, M, AM.BaseGV != nullptr))
17356 Subtarget->ClassifyGlobalReference(AM.BaseGV, getTargetMachine());
17358 // If a reference to this global requires an extra load, we can't fold it.
17359 if (isGlobalStubReference(GVFlags))
17362 // If BaseGV requires a register for the PIC base, we cannot also have a
17363 // BaseReg specified.
17364 if (AM.HasBaseReg && isGlobalRelativeToPICBase(GVFlags))
17367 // If lower 4G is not available, then we must use rip-relative addressing.
17368 if ((M != CodeModel::Small || R != Reloc::Static) &&
17369 Subtarget->is64Bit() && (AM.BaseOffs || AM.Scale > 1))
17373 switch (AM.Scale) {
17379 // These scales always work.
17384 // These scales are formed with basereg+scalereg. Only accept if there is
17389 default: // Other stuff never works.
17396 bool X86TargetLowering::isVectorShiftByScalarCheap(Type *Ty) const {
17397 unsigned Bits = Ty->getScalarSizeInBits();
17399 // 8-bit shifts are always expensive, but versions with a scalar amount aren't
17400 // particularly cheaper than those without.
17404 // On AVX2 there are new vpsllv[dq] instructions (and other shifts), that make
17405 // variable shifts just as cheap as scalar ones.
17406 if (Subtarget->hasInt256() && (Bits == 32 || Bits == 64))
17409 // Otherwise, it's significantly cheaper to shift by a scalar amount than by a
17410 // fully general vector.
17414 bool X86TargetLowering::isTruncateFree(Type *Ty1, Type *Ty2) const {
17415 if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy())
17417 unsigned NumBits1 = Ty1->getPrimitiveSizeInBits();
17418 unsigned NumBits2 = Ty2->getPrimitiveSizeInBits();
17419 return NumBits1 > NumBits2;
17422 bool X86TargetLowering::allowTruncateForTailCall(Type *Ty1, Type *Ty2) const {
17423 if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy())
17426 if (!isTypeLegal(EVT::getEVT(Ty1)))
17429 assert(Ty1->getPrimitiveSizeInBits() <= 64 && "i128 is probably not a noop");
17431 // Assuming the caller doesn't have a zeroext or signext return parameter,
17432 // truncation all the way down to i1 is valid.
17436 bool X86TargetLowering::isLegalICmpImmediate(int64_t Imm) const {
17437 return isInt<32>(Imm);
17440 bool X86TargetLowering::isLegalAddImmediate(int64_t Imm) const {
17441 // Can also use sub to handle negated immediates.
17442 return isInt<32>(Imm);
17445 bool X86TargetLowering::isTruncateFree(EVT VT1, EVT VT2) const {
17446 if (!VT1.isInteger() || !VT2.isInteger())
17448 unsigned NumBits1 = VT1.getSizeInBits();
17449 unsigned NumBits2 = VT2.getSizeInBits();
17450 return NumBits1 > NumBits2;
17453 bool X86TargetLowering::isZExtFree(Type *Ty1, Type *Ty2) const {
17454 // x86-64 implicitly zero-extends 32-bit results in 64-bit registers.
17455 return Ty1->isIntegerTy(32) && Ty2->isIntegerTy(64) && Subtarget->is64Bit();
17458 bool X86TargetLowering::isZExtFree(EVT VT1, EVT VT2) const {
17459 // x86-64 implicitly zero-extends 32-bit results in 64-bit registers.
17460 return VT1 == MVT::i32 && VT2 == MVT::i64 && Subtarget->is64Bit();
17463 bool X86TargetLowering::isZExtFree(SDValue Val, EVT VT2) const {
17464 EVT VT1 = Val.getValueType();
17465 if (isZExtFree(VT1, VT2))
17468 if (Val.getOpcode() != ISD::LOAD)
17471 if (!VT1.isSimple() || !VT1.isInteger() ||
17472 !VT2.isSimple() || !VT2.isInteger())
17475 switch (VT1.getSimpleVT().SimpleTy) {
17480 // X86 has 8, 16, and 32-bit zero-extending loads.
17488 X86TargetLowering::isFMAFasterThanFMulAndFAdd(EVT VT) const {
17489 if (!(Subtarget->hasFMA() || Subtarget->hasFMA4()))
17492 VT = VT.getScalarType();
17494 if (!VT.isSimple())
17497 switch (VT.getSimpleVT().SimpleTy) {
17508 bool X86TargetLowering::isNarrowingProfitable(EVT VT1, EVT VT2) const {
17509 // i16 instructions are longer (0x66 prefix) and potentially slower.
17510 return !(VT1 == MVT::i32 && VT2 == MVT::i16);
17513 /// isShuffleMaskLegal - Targets can use this to indicate that they only
17514 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
17515 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
17516 /// are assumed to be legal.
17518 X86TargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &M,
17520 if (!VT.isSimple())
17523 MVT SVT = VT.getSimpleVT();
17525 // Very little shuffling can be done for 64-bit vectors right now.
17526 if (VT.getSizeInBits() == 64)
17529 // If this is a single-input shuffle with no 128 bit lane crossings we can
17530 // lower it into pshufb.
17531 if ((SVT.is128BitVector() && Subtarget->hasSSSE3()) ||
17532 (SVT.is256BitVector() && Subtarget->hasInt256())) {
17533 bool isLegal = true;
17534 for (unsigned I = 0, E = M.size(); I != E; ++I) {
17535 if (M[I] >= (int)SVT.getVectorNumElements() ||
17536 ShuffleCrosses128bitLane(SVT, I, M[I])) {
17545 // FIXME: blends, shifts.
17546 return (SVT.getVectorNumElements() == 2 ||
17547 ShuffleVectorSDNode::isSplatMask(&M[0], VT) ||
17548 isMOVLMask(M, SVT) ||
17549 isMOVHLPSMask(M, SVT) ||
17550 isSHUFPMask(M, SVT) ||
17551 isPSHUFDMask(M, SVT) ||
17552 isPSHUFHWMask(M, SVT, Subtarget->hasInt256()) ||
17553 isPSHUFLWMask(M, SVT, Subtarget->hasInt256()) ||
17554 isPALIGNRMask(M, SVT, Subtarget) ||
17555 isUNPCKLMask(M, SVT, Subtarget->hasInt256()) ||
17556 isUNPCKHMask(M, SVT, Subtarget->hasInt256()) ||
17557 isUNPCKL_v_undef_Mask(M, SVT, Subtarget->hasInt256()) ||
17558 isUNPCKH_v_undef_Mask(M, SVT, Subtarget->hasInt256()) ||
17559 isBlendMask(M, SVT, Subtarget->hasSSE41(), Subtarget->hasInt256()));
17563 X86TargetLowering::isVectorClearMaskLegal(const SmallVectorImpl<int> &Mask,
17565 if (!VT.isSimple())
17568 MVT SVT = VT.getSimpleVT();
17569 unsigned NumElts = SVT.getVectorNumElements();
17570 // FIXME: This collection of masks seems suspect.
17573 if (NumElts == 4 && SVT.is128BitVector()) {
17574 return (isMOVLMask(Mask, SVT) ||
17575 isCommutedMOVLMask(Mask, SVT, true) ||
17576 isSHUFPMask(Mask, SVT) ||
17577 isSHUFPMask(Mask, SVT, /* Commuted */ true));
17582 //===----------------------------------------------------------------------===//
17583 // X86 Scheduler Hooks
17584 //===----------------------------------------------------------------------===//
17586 /// Utility function to emit xbegin specifying the start of an RTM region.
17587 static MachineBasicBlock *EmitXBegin(MachineInstr *MI, MachineBasicBlock *MBB,
17588 const TargetInstrInfo *TII) {
17589 DebugLoc DL = MI->getDebugLoc();
17591 const BasicBlock *BB = MBB->getBasicBlock();
17592 MachineFunction::iterator I = MBB;
17595 // For the v = xbegin(), we generate
17606 MachineBasicBlock *thisMBB = MBB;
17607 MachineFunction *MF = MBB->getParent();
17608 MachineBasicBlock *mainMBB = MF->CreateMachineBasicBlock(BB);
17609 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(BB);
17610 MF->insert(I, mainMBB);
17611 MF->insert(I, sinkMBB);
17613 // Transfer the remainder of BB and its successor edges to sinkMBB.
17614 sinkMBB->splice(sinkMBB->begin(), MBB,
17615 std::next(MachineBasicBlock::iterator(MI)), MBB->end());
17616 sinkMBB->transferSuccessorsAndUpdatePHIs(MBB);
17620 // # fallthrough to mainMBB
17621 // # abortion to sinkMBB
17622 BuildMI(thisMBB, DL, TII->get(X86::XBEGIN_4)).addMBB(sinkMBB);
17623 thisMBB->addSuccessor(mainMBB);
17624 thisMBB->addSuccessor(sinkMBB);
17628 BuildMI(mainMBB, DL, TII->get(X86::MOV32ri), X86::EAX).addImm(-1);
17629 mainMBB->addSuccessor(sinkMBB);
17632 // EAX is live into the sinkMBB
17633 sinkMBB->addLiveIn(X86::EAX);
17634 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
17635 TII->get(TargetOpcode::COPY), MI->getOperand(0).getReg())
17638 MI->eraseFromParent();
17642 // FIXME: When we get size specific XMM0 registers, i.e. XMM0_V16I8
17643 // or XMM0_V32I8 in AVX all of this code can be replaced with that
17644 // in the .td file.
17645 static MachineBasicBlock *EmitPCMPSTRM(MachineInstr *MI, MachineBasicBlock *BB,
17646 const TargetInstrInfo *TII) {
17648 switch (MI->getOpcode()) {
17649 default: llvm_unreachable("illegal opcode!");
17650 case X86::PCMPISTRM128REG: Opc = X86::PCMPISTRM128rr; break;
17651 case X86::VPCMPISTRM128REG: Opc = X86::VPCMPISTRM128rr; break;
17652 case X86::PCMPISTRM128MEM: Opc = X86::PCMPISTRM128rm; break;
17653 case X86::VPCMPISTRM128MEM: Opc = X86::VPCMPISTRM128rm; break;
17654 case X86::PCMPESTRM128REG: Opc = X86::PCMPESTRM128rr; break;
17655 case X86::VPCMPESTRM128REG: Opc = X86::VPCMPESTRM128rr; break;
17656 case X86::PCMPESTRM128MEM: Opc = X86::PCMPESTRM128rm; break;
17657 case X86::VPCMPESTRM128MEM: Opc = X86::VPCMPESTRM128rm; break;
17660 DebugLoc dl = MI->getDebugLoc();
17661 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(Opc));
17663 unsigned NumArgs = MI->getNumOperands();
17664 for (unsigned i = 1; i < NumArgs; ++i) {
17665 MachineOperand &Op = MI->getOperand(i);
17666 if (!(Op.isReg() && Op.isImplicit()))
17667 MIB.addOperand(Op);
17669 if (MI->hasOneMemOperand())
17670 MIB->setMemRefs(MI->memoperands_begin(), MI->memoperands_end());
17672 BuildMI(*BB, MI, dl,
17673 TII->get(TargetOpcode::COPY), MI->getOperand(0).getReg())
17674 .addReg(X86::XMM0);
17676 MI->eraseFromParent();
17680 // FIXME: Custom handling because TableGen doesn't support multiple implicit
17681 // defs in an instruction pattern
17682 static MachineBasicBlock *EmitPCMPSTRI(MachineInstr *MI, MachineBasicBlock *BB,
17683 const TargetInstrInfo *TII) {
17685 switch (MI->getOpcode()) {
17686 default: llvm_unreachable("illegal opcode!");
17687 case X86::PCMPISTRIREG: Opc = X86::PCMPISTRIrr; break;
17688 case X86::VPCMPISTRIREG: Opc = X86::VPCMPISTRIrr; break;
17689 case X86::PCMPISTRIMEM: Opc = X86::PCMPISTRIrm; break;
17690 case X86::VPCMPISTRIMEM: Opc = X86::VPCMPISTRIrm; break;
17691 case X86::PCMPESTRIREG: Opc = X86::PCMPESTRIrr; break;
17692 case X86::VPCMPESTRIREG: Opc = X86::VPCMPESTRIrr; break;
17693 case X86::PCMPESTRIMEM: Opc = X86::PCMPESTRIrm; break;
17694 case X86::VPCMPESTRIMEM: Opc = X86::VPCMPESTRIrm; break;
17697 DebugLoc dl = MI->getDebugLoc();
17698 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(Opc));
17700 unsigned NumArgs = MI->getNumOperands(); // remove the results
17701 for (unsigned i = 1; i < NumArgs; ++i) {
17702 MachineOperand &Op = MI->getOperand(i);
17703 if (!(Op.isReg() && Op.isImplicit()))
17704 MIB.addOperand(Op);
17706 if (MI->hasOneMemOperand())
17707 MIB->setMemRefs(MI->memoperands_begin(), MI->memoperands_end());
17709 BuildMI(*BB, MI, dl,
17710 TII->get(TargetOpcode::COPY), MI->getOperand(0).getReg())
17713 MI->eraseFromParent();
17717 static MachineBasicBlock * EmitMonitor(MachineInstr *MI, MachineBasicBlock *BB,
17718 const TargetInstrInfo *TII,
17719 const X86Subtarget* Subtarget) {
17720 DebugLoc dl = MI->getDebugLoc();
17722 // Address into RAX/EAX, other two args into ECX, EDX.
17723 unsigned MemOpc = Subtarget->is64Bit() ? X86::LEA64r : X86::LEA32r;
17724 unsigned MemReg = Subtarget->is64Bit() ? X86::RAX : X86::EAX;
17725 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(MemOpc), MemReg);
17726 for (int i = 0; i < X86::AddrNumOperands; ++i)
17727 MIB.addOperand(MI->getOperand(i));
17729 unsigned ValOps = X86::AddrNumOperands;
17730 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::ECX)
17731 .addReg(MI->getOperand(ValOps).getReg());
17732 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::EDX)
17733 .addReg(MI->getOperand(ValOps+1).getReg());
17735 // The instruction doesn't actually take any operands though.
17736 BuildMI(*BB, MI, dl, TII->get(X86::MONITORrrr));
17738 MI->eraseFromParent(); // The pseudo is gone now.
17742 MachineBasicBlock *
17743 X86TargetLowering::EmitVAARG64WithCustomInserter(
17745 MachineBasicBlock *MBB) const {
17746 // Emit va_arg instruction on X86-64.
17748 // Operands to this pseudo-instruction:
17749 // 0 ) Output : destination address (reg)
17750 // 1-5) Input : va_list address (addr, i64mem)
17751 // 6 ) ArgSize : Size (in bytes) of vararg type
17752 // 7 ) ArgMode : 0=overflow only, 1=use gp_offset, 2=use fp_offset
17753 // 8 ) Align : Alignment of type
17754 // 9 ) EFLAGS (implicit-def)
17756 assert(MI->getNumOperands() == 10 && "VAARG_64 should have 10 operands!");
17757 assert(X86::AddrNumOperands == 5 && "VAARG_64 assumes 5 address operands");
17759 unsigned DestReg = MI->getOperand(0).getReg();
17760 MachineOperand &Base = MI->getOperand(1);
17761 MachineOperand &Scale = MI->getOperand(2);
17762 MachineOperand &Index = MI->getOperand(3);
17763 MachineOperand &Disp = MI->getOperand(4);
17764 MachineOperand &Segment = MI->getOperand(5);
17765 unsigned ArgSize = MI->getOperand(6).getImm();
17766 unsigned ArgMode = MI->getOperand(7).getImm();
17767 unsigned Align = MI->getOperand(8).getImm();
17769 // Memory Reference
17770 assert(MI->hasOneMemOperand() && "Expected VAARG_64 to have one memoperand");
17771 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
17772 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
17774 // Machine Information
17775 const TargetInstrInfo *TII = MBB->getParent()->getSubtarget().getInstrInfo();
17776 MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo();
17777 const TargetRegisterClass *AddrRegClass = getRegClassFor(MVT::i64);
17778 const TargetRegisterClass *OffsetRegClass = getRegClassFor(MVT::i32);
17779 DebugLoc DL = MI->getDebugLoc();
17781 // struct va_list {
17784 // i64 overflow_area (address)
17785 // i64 reg_save_area (address)
17787 // sizeof(va_list) = 24
17788 // alignment(va_list) = 8
17790 unsigned TotalNumIntRegs = 6;
17791 unsigned TotalNumXMMRegs = 8;
17792 bool UseGPOffset = (ArgMode == 1);
17793 bool UseFPOffset = (ArgMode == 2);
17794 unsigned MaxOffset = TotalNumIntRegs * 8 +
17795 (UseFPOffset ? TotalNumXMMRegs * 16 : 0);
17797 /* Align ArgSize to a multiple of 8 */
17798 unsigned ArgSizeA8 = (ArgSize + 7) & ~7;
17799 bool NeedsAlign = (Align > 8);
17801 MachineBasicBlock *thisMBB = MBB;
17802 MachineBasicBlock *overflowMBB;
17803 MachineBasicBlock *offsetMBB;
17804 MachineBasicBlock *endMBB;
17806 unsigned OffsetDestReg = 0; // Argument address computed by offsetMBB
17807 unsigned OverflowDestReg = 0; // Argument address computed by overflowMBB
17808 unsigned OffsetReg = 0;
17810 if (!UseGPOffset && !UseFPOffset) {
17811 // If we only pull from the overflow region, we don't create a branch.
17812 // We don't need to alter control flow.
17813 OffsetDestReg = 0; // unused
17814 OverflowDestReg = DestReg;
17816 offsetMBB = nullptr;
17817 overflowMBB = thisMBB;
17820 // First emit code to check if gp_offset (or fp_offset) is below the bound.
17821 // If so, pull the argument from reg_save_area. (branch to offsetMBB)
17822 // If not, pull from overflow_area. (branch to overflowMBB)
17827 // offsetMBB overflowMBB
17832 // Registers for the PHI in endMBB
17833 OffsetDestReg = MRI.createVirtualRegister(AddrRegClass);
17834 OverflowDestReg = MRI.createVirtualRegister(AddrRegClass);
17836 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
17837 MachineFunction *MF = MBB->getParent();
17838 overflowMBB = MF->CreateMachineBasicBlock(LLVM_BB);
17839 offsetMBB = MF->CreateMachineBasicBlock(LLVM_BB);
17840 endMBB = MF->CreateMachineBasicBlock(LLVM_BB);
17842 MachineFunction::iterator MBBIter = MBB;
17845 // Insert the new basic blocks
17846 MF->insert(MBBIter, offsetMBB);
17847 MF->insert(MBBIter, overflowMBB);
17848 MF->insert(MBBIter, endMBB);
17850 // Transfer the remainder of MBB and its successor edges to endMBB.
17851 endMBB->splice(endMBB->begin(), thisMBB,
17852 std::next(MachineBasicBlock::iterator(MI)), thisMBB->end());
17853 endMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
17855 // Make offsetMBB and overflowMBB successors of thisMBB
17856 thisMBB->addSuccessor(offsetMBB);
17857 thisMBB->addSuccessor(overflowMBB);
17859 // endMBB is a successor of both offsetMBB and overflowMBB
17860 offsetMBB->addSuccessor(endMBB);
17861 overflowMBB->addSuccessor(endMBB);
17863 // Load the offset value into a register
17864 OffsetReg = MRI.createVirtualRegister(OffsetRegClass);
17865 BuildMI(thisMBB, DL, TII->get(X86::MOV32rm), OffsetReg)
17869 .addDisp(Disp, UseFPOffset ? 4 : 0)
17870 .addOperand(Segment)
17871 .setMemRefs(MMOBegin, MMOEnd);
17873 // Check if there is enough room left to pull this argument.
17874 BuildMI(thisMBB, DL, TII->get(X86::CMP32ri))
17876 .addImm(MaxOffset + 8 - ArgSizeA8);
17878 // Branch to "overflowMBB" if offset >= max
17879 // Fall through to "offsetMBB" otherwise
17880 BuildMI(thisMBB, DL, TII->get(X86::GetCondBranchFromCond(X86::COND_AE)))
17881 .addMBB(overflowMBB);
17884 // In offsetMBB, emit code to use the reg_save_area.
17886 assert(OffsetReg != 0);
17888 // Read the reg_save_area address.
17889 unsigned RegSaveReg = MRI.createVirtualRegister(AddrRegClass);
17890 BuildMI(offsetMBB, DL, TII->get(X86::MOV64rm), RegSaveReg)
17895 .addOperand(Segment)
17896 .setMemRefs(MMOBegin, MMOEnd);
17898 // Zero-extend the offset
17899 unsigned OffsetReg64 = MRI.createVirtualRegister(AddrRegClass);
17900 BuildMI(offsetMBB, DL, TII->get(X86::SUBREG_TO_REG), OffsetReg64)
17903 .addImm(X86::sub_32bit);
17905 // Add the offset to the reg_save_area to get the final address.
17906 BuildMI(offsetMBB, DL, TII->get(X86::ADD64rr), OffsetDestReg)
17907 .addReg(OffsetReg64)
17908 .addReg(RegSaveReg);
17910 // Compute the offset for the next argument
17911 unsigned NextOffsetReg = MRI.createVirtualRegister(OffsetRegClass);
17912 BuildMI(offsetMBB, DL, TII->get(X86::ADD32ri), NextOffsetReg)
17914 .addImm(UseFPOffset ? 16 : 8);
17916 // Store it back into the va_list.
17917 BuildMI(offsetMBB, DL, TII->get(X86::MOV32mr))
17921 .addDisp(Disp, UseFPOffset ? 4 : 0)
17922 .addOperand(Segment)
17923 .addReg(NextOffsetReg)
17924 .setMemRefs(MMOBegin, MMOEnd);
17927 BuildMI(offsetMBB, DL, TII->get(X86::JMP_4))
17932 // Emit code to use overflow area
17935 // Load the overflow_area address into a register.
17936 unsigned OverflowAddrReg = MRI.createVirtualRegister(AddrRegClass);
17937 BuildMI(overflowMBB, DL, TII->get(X86::MOV64rm), OverflowAddrReg)
17942 .addOperand(Segment)
17943 .setMemRefs(MMOBegin, MMOEnd);
17945 // If we need to align it, do so. Otherwise, just copy the address
17946 // to OverflowDestReg.
17948 // Align the overflow address
17949 assert((Align & (Align-1)) == 0 && "Alignment must be a power of 2");
17950 unsigned TmpReg = MRI.createVirtualRegister(AddrRegClass);
17952 // aligned_addr = (addr + (align-1)) & ~(align-1)
17953 BuildMI(overflowMBB, DL, TII->get(X86::ADD64ri32), TmpReg)
17954 .addReg(OverflowAddrReg)
17957 BuildMI(overflowMBB, DL, TII->get(X86::AND64ri32), OverflowDestReg)
17959 .addImm(~(uint64_t)(Align-1));
17961 BuildMI(overflowMBB, DL, TII->get(TargetOpcode::COPY), OverflowDestReg)
17962 .addReg(OverflowAddrReg);
17965 // Compute the next overflow address after this argument.
17966 // (the overflow address should be kept 8-byte aligned)
17967 unsigned NextAddrReg = MRI.createVirtualRegister(AddrRegClass);
17968 BuildMI(overflowMBB, DL, TII->get(X86::ADD64ri32), NextAddrReg)
17969 .addReg(OverflowDestReg)
17970 .addImm(ArgSizeA8);
17972 // Store the new overflow address.
17973 BuildMI(overflowMBB, DL, TII->get(X86::MOV64mr))
17978 .addOperand(Segment)
17979 .addReg(NextAddrReg)
17980 .setMemRefs(MMOBegin, MMOEnd);
17982 // If we branched, emit the PHI to the front of endMBB.
17984 BuildMI(*endMBB, endMBB->begin(), DL,
17985 TII->get(X86::PHI), DestReg)
17986 .addReg(OffsetDestReg).addMBB(offsetMBB)
17987 .addReg(OverflowDestReg).addMBB(overflowMBB);
17990 // Erase the pseudo instruction
17991 MI->eraseFromParent();
17996 MachineBasicBlock *
17997 X86TargetLowering::EmitVAStartSaveXMMRegsWithCustomInserter(
17999 MachineBasicBlock *MBB) const {
18000 // Emit code to save XMM registers to the stack. The ABI says that the
18001 // number of registers to save is given in %al, so it's theoretically
18002 // possible to do an indirect jump trick to avoid saving all of them,
18003 // however this code takes a simpler approach and just executes all
18004 // of the stores if %al is non-zero. It's less code, and it's probably
18005 // easier on the hardware branch predictor, and stores aren't all that
18006 // expensive anyway.
18008 // Create the new basic blocks. One block contains all the XMM stores,
18009 // and one block is the final destination regardless of whether any
18010 // stores were performed.
18011 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
18012 MachineFunction *F = MBB->getParent();
18013 MachineFunction::iterator MBBIter = MBB;
18015 MachineBasicBlock *XMMSaveMBB = F->CreateMachineBasicBlock(LLVM_BB);
18016 MachineBasicBlock *EndMBB = F->CreateMachineBasicBlock(LLVM_BB);
18017 F->insert(MBBIter, XMMSaveMBB);
18018 F->insert(MBBIter, EndMBB);
18020 // Transfer the remainder of MBB and its successor edges to EndMBB.
18021 EndMBB->splice(EndMBB->begin(), MBB,
18022 std::next(MachineBasicBlock::iterator(MI)), MBB->end());
18023 EndMBB->transferSuccessorsAndUpdatePHIs(MBB);
18025 // The original block will now fall through to the XMM save block.
18026 MBB->addSuccessor(XMMSaveMBB);
18027 // The XMMSaveMBB will fall through to the end block.
18028 XMMSaveMBB->addSuccessor(EndMBB);
18030 // Now add the instructions.
18031 const TargetInstrInfo *TII = MBB->getParent()->getSubtarget().getInstrInfo();
18032 DebugLoc DL = MI->getDebugLoc();
18034 unsigned CountReg = MI->getOperand(0).getReg();
18035 int64_t RegSaveFrameIndex = MI->getOperand(1).getImm();
18036 int64_t VarArgsFPOffset = MI->getOperand(2).getImm();
18038 if (!Subtarget->isTargetWin64()) {
18039 // If %al is 0, branch around the XMM save block.
18040 BuildMI(MBB, DL, TII->get(X86::TEST8rr)).addReg(CountReg).addReg(CountReg);
18041 BuildMI(MBB, DL, TII->get(X86::JE_4)).addMBB(EndMBB);
18042 MBB->addSuccessor(EndMBB);
18045 // Make sure the last operand is EFLAGS, which gets clobbered by the branch
18046 // that was just emitted, but clearly shouldn't be "saved".
18047 assert((MI->getNumOperands() <= 3 ||
18048 !MI->getOperand(MI->getNumOperands() - 1).isReg() ||
18049 MI->getOperand(MI->getNumOperands() - 1).getReg() == X86::EFLAGS)
18050 && "Expected last argument to be EFLAGS");
18051 unsigned MOVOpc = Subtarget->hasFp256() ? X86::VMOVAPSmr : X86::MOVAPSmr;
18052 // In the XMM save block, save all the XMM argument registers.
18053 for (int i = 3, e = MI->getNumOperands() - 1; i != e; ++i) {
18054 int64_t Offset = (i - 3) * 16 + VarArgsFPOffset;
18055 MachineMemOperand *MMO =
18056 F->getMachineMemOperand(
18057 MachinePointerInfo::getFixedStack(RegSaveFrameIndex, Offset),
18058 MachineMemOperand::MOStore,
18059 /*Size=*/16, /*Align=*/16);
18060 BuildMI(XMMSaveMBB, DL, TII->get(MOVOpc))
18061 .addFrameIndex(RegSaveFrameIndex)
18062 .addImm(/*Scale=*/1)
18063 .addReg(/*IndexReg=*/0)
18064 .addImm(/*Disp=*/Offset)
18065 .addReg(/*Segment=*/0)
18066 .addReg(MI->getOperand(i).getReg())
18067 .addMemOperand(MMO);
18070 MI->eraseFromParent(); // The pseudo instruction is gone now.
18075 // The EFLAGS operand of SelectItr might be missing a kill marker
18076 // because there were multiple uses of EFLAGS, and ISel didn't know
18077 // which to mark. Figure out whether SelectItr should have had a
18078 // kill marker, and set it if it should. Returns the correct kill
18080 static bool checkAndUpdateEFLAGSKill(MachineBasicBlock::iterator SelectItr,
18081 MachineBasicBlock* BB,
18082 const TargetRegisterInfo* TRI) {
18083 // Scan forward through BB for a use/def of EFLAGS.
18084 MachineBasicBlock::iterator miI(std::next(SelectItr));
18085 for (MachineBasicBlock::iterator miE = BB->end(); miI != miE; ++miI) {
18086 const MachineInstr& mi = *miI;
18087 if (mi.readsRegister(X86::EFLAGS))
18089 if (mi.definesRegister(X86::EFLAGS))
18090 break; // Should have kill-flag - update below.
18093 // If we hit the end of the block, check whether EFLAGS is live into a
18095 if (miI == BB->end()) {
18096 for (MachineBasicBlock::succ_iterator sItr = BB->succ_begin(),
18097 sEnd = BB->succ_end();
18098 sItr != sEnd; ++sItr) {
18099 MachineBasicBlock* succ = *sItr;
18100 if (succ->isLiveIn(X86::EFLAGS))
18105 // We found a def, or hit the end of the basic block and EFLAGS wasn't live
18106 // out. SelectMI should have a kill flag on EFLAGS.
18107 SelectItr->addRegisterKilled(X86::EFLAGS, TRI);
18111 MachineBasicBlock *
18112 X86TargetLowering::EmitLoweredSelect(MachineInstr *MI,
18113 MachineBasicBlock *BB) const {
18114 const TargetInstrInfo *TII = BB->getParent()->getSubtarget().getInstrInfo();
18115 DebugLoc DL = MI->getDebugLoc();
18117 // To "insert" a SELECT_CC instruction, we actually have to insert the
18118 // diamond control-flow pattern. The incoming instruction knows the
18119 // destination vreg to set, the condition code register to branch on, the
18120 // true/false values to select between, and a branch opcode to use.
18121 const BasicBlock *LLVM_BB = BB->getBasicBlock();
18122 MachineFunction::iterator It = BB;
18128 // cmpTY ccX, r1, r2
18130 // fallthrough --> copy0MBB
18131 MachineBasicBlock *thisMBB = BB;
18132 MachineFunction *F = BB->getParent();
18133 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
18134 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
18135 F->insert(It, copy0MBB);
18136 F->insert(It, sinkMBB);
18138 // If the EFLAGS register isn't dead in the terminator, then claim that it's
18139 // live into the sink and copy blocks.
18140 const TargetRegisterInfo *TRI =
18141 BB->getParent()->getSubtarget().getRegisterInfo();
18142 if (!MI->killsRegister(X86::EFLAGS) &&
18143 !checkAndUpdateEFLAGSKill(MI, BB, TRI)) {
18144 copy0MBB->addLiveIn(X86::EFLAGS);
18145 sinkMBB->addLiveIn(X86::EFLAGS);
18148 // Transfer the remainder of BB and its successor edges to sinkMBB.
18149 sinkMBB->splice(sinkMBB->begin(), BB,
18150 std::next(MachineBasicBlock::iterator(MI)), BB->end());
18151 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
18153 // Add the true and fallthrough blocks as its successors.
18154 BB->addSuccessor(copy0MBB);
18155 BB->addSuccessor(sinkMBB);
18157 // Create the conditional branch instruction.
18159 X86::GetCondBranchFromCond((X86::CondCode)MI->getOperand(3).getImm());
18160 BuildMI(BB, DL, TII->get(Opc)).addMBB(sinkMBB);
18163 // %FalseValue = ...
18164 // # fallthrough to sinkMBB
18165 copy0MBB->addSuccessor(sinkMBB);
18168 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
18170 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
18171 TII->get(X86::PHI), MI->getOperand(0).getReg())
18172 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
18173 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
18175 MI->eraseFromParent(); // The pseudo instruction is gone now.
18179 MachineBasicBlock *
18180 X86TargetLowering::EmitLoweredSegAlloca(MachineInstr *MI, MachineBasicBlock *BB,
18181 bool Is64Bit) const {
18182 MachineFunction *MF = BB->getParent();
18183 const TargetInstrInfo *TII = MF->getSubtarget().getInstrInfo();
18184 DebugLoc DL = MI->getDebugLoc();
18185 const BasicBlock *LLVM_BB = BB->getBasicBlock();
18187 assert(MF->shouldSplitStack());
18189 unsigned TlsReg = Is64Bit ? X86::FS : X86::GS;
18190 unsigned TlsOffset = Is64Bit ? 0x70 : 0x30;
18193 // ... [Till the alloca]
18194 // If stacklet is not large enough, jump to mallocMBB
18197 // Allocate by subtracting from RSP
18198 // Jump to continueMBB
18201 // Allocate by call to runtime
18205 // [rest of original BB]
18208 MachineBasicBlock *mallocMBB = MF->CreateMachineBasicBlock(LLVM_BB);
18209 MachineBasicBlock *bumpMBB = MF->CreateMachineBasicBlock(LLVM_BB);
18210 MachineBasicBlock *continueMBB = MF->CreateMachineBasicBlock(LLVM_BB);
18212 MachineRegisterInfo &MRI = MF->getRegInfo();
18213 const TargetRegisterClass *AddrRegClass =
18214 getRegClassFor(Is64Bit ? MVT::i64:MVT::i32);
18216 unsigned mallocPtrVReg = MRI.createVirtualRegister(AddrRegClass),
18217 bumpSPPtrVReg = MRI.createVirtualRegister(AddrRegClass),
18218 tmpSPVReg = MRI.createVirtualRegister(AddrRegClass),
18219 SPLimitVReg = MRI.createVirtualRegister(AddrRegClass),
18220 sizeVReg = MI->getOperand(1).getReg(),
18221 physSPReg = Is64Bit ? X86::RSP : X86::ESP;
18223 MachineFunction::iterator MBBIter = BB;
18226 MF->insert(MBBIter, bumpMBB);
18227 MF->insert(MBBIter, mallocMBB);
18228 MF->insert(MBBIter, continueMBB);
18230 continueMBB->splice(continueMBB->begin(), BB,
18231 std::next(MachineBasicBlock::iterator(MI)), BB->end());
18232 continueMBB->transferSuccessorsAndUpdatePHIs(BB);
18234 // Add code to the main basic block to check if the stack limit has been hit,
18235 // and if so, jump to mallocMBB otherwise to bumpMBB.
18236 BuildMI(BB, DL, TII->get(TargetOpcode::COPY), tmpSPVReg).addReg(physSPReg);
18237 BuildMI(BB, DL, TII->get(Is64Bit ? X86::SUB64rr:X86::SUB32rr), SPLimitVReg)
18238 .addReg(tmpSPVReg).addReg(sizeVReg);
18239 BuildMI(BB, DL, TII->get(Is64Bit ? X86::CMP64mr:X86::CMP32mr))
18240 .addReg(0).addImm(1).addReg(0).addImm(TlsOffset).addReg(TlsReg)
18241 .addReg(SPLimitVReg);
18242 BuildMI(BB, DL, TII->get(X86::JG_4)).addMBB(mallocMBB);
18244 // bumpMBB simply decreases the stack pointer, since we know the current
18245 // stacklet has enough space.
18246 BuildMI(bumpMBB, DL, TII->get(TargetOpcode::COPY), physSPReg)
18247 .addReg(SPLimitVReg);
18248 BuildMI(bumpMBB, DL, TII->get(TargetOpcode::COPY), bumpSPPtrVReg)
18249 .addReg(SPLimitVReg);
18250 BuildMI(bumpMBB, DL, TII->get(X86::JMP_4)).addMBB(continueMBB);
18252 // Calls into a routine in libgcc to allocate more space from the heap.
18253 const uint32_t *RegMask = MF->getTarget()
18254 .getSubtargetImpl()
18255 ->getRegisterInfo()
18256 ->getCallPreservedMask(CallingConv::C);
18258 BuildMI(mallocMBB, DL, TII->get(X86::MOV64rr), X86::RDI)
18260 BuildMI(mallocMBB, DL, TII->get(X86::CALL64pcrel32))
18261 .addExternalSymbol("__morestack_allocate_stack_space")
18262 .addRegMask(RegMask)
18263 .addReg(X86::RDI, RegState::Implicit)
18264 .addReg(X86::RAX, RegState::ImplicitDefine);
18266 BuildMI(mallocMBB, DL, TII->get(X86::SUB32ri), physSPReg).addReg(physSPReg)
18268 BuildMI(mallocMBB, DL, TII->get(X86::PUSH32r)).addReg(sizeVReg);
18269 BuildMI(mallocMBB, DL, TII->get(X86::CALLpcrel32))
18270 .addExternalSymbol("__morestack_allocate_stack_space")
18271 .addRegMask(RegMask)
18272 .addReg(X86::EAX, RegState::ImplicitDefine);
18276 BuildMI(mallocMBB, DL, TII->get(X86::ADD32ri), physSPReg).addReg(physSPReg)
18279 BuildMI(mallocMBB, DL, TII->get(TargetOpcode::COPY), mallocPtrVReg)
18280 .addReg(Is64Bit ? X86::RAX : X86::EAX);
18281 BuildMI(mallocMBB, DL, TII->get(X86::JMP_4)).addMBB(continueMBB);
18283 // Set up the CFG correctly.
18284 BB->addSuccessor(bumpMBB);
18285 BB->addSuccessor(mallocMBB);
18286 mallocMBB->addSuccessor(continueMBB);
18287 bumpMBB->addSuccessor(continueMBB);
18289 // Take care of the PHI nodes.
18290 BuildMI(*continueMBB, continueMBB->begin(), DL, TII->get(X86::PHI),
18291 MI->getOperand(0).getReg())
18292 .addReg(mallocPtrVReg).addMBB(mallocMBB)
18293 .addReg(bumpSPPtrVReg).addMBB(bumpMBB);
18295 // Delete the original pseudo instruction.
18296 MI->eraseFromParent();
18299 return continueMBB;
18302 MachineBasicBlock *
18303 X86TargetLowering::EmitLoweredWinAlloca(MachineInstr *MI,
18304 MachineBasicBlock *BB) const {
18305 const TargetInstrInfo *TII = BB->getParent()->getSubtarget().getInstrInfo();
18306 DebugLoc DL = MI->getDebugLoc();
18308 assert(!Subtarget->isTargetMacho());
18310 // The lowering is pretty easy: we're just emitting the call to _alloca. The
18311 // non-trivial part is impdef of ESP.
18313 if (Subtarget->isTargetWin64()) {
18314 if (Subtarget->isTargetCygMing()) {
18315 // ___chkstk(Mingw64):
18316 // Clobbers R10, R11, RAX and EFLAGS.
18318 BuildMI(*BB, MI, DL, TII->get(X86::W64ALLOCA))
18319 .addExternalSymbol("___chkstk")
18320 .addReg(X86::RAX, RegState::Implicit)
18321 .addReg(X86::RSP, RegState::Implicit)
18322 .addReg(X86::RAX, RegState::Define | RegState::Implicit)
18323 .addReg(X86::RSP, RegState::Define | RegState::Implicit)
18324 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
18326 // __chkstk(MSVCRT): does not update stack pointer.
18327 // Clobbers R10, R11 and EFLAGS.
18328 BuildMI(*BB, MI, DL, TII->get(X86::W64ALLOCA))
18329 .addExternalSymbol("__chkstk")
18330 .addReg(X86::RAX, RegState::Implicit)
18331 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
18332 // RAX has the offset to be subtracted from RSP.
18333 BuildMI(*BB, MI, DL, TII->get(X86::SUB64rr), X86::RSP)
18338 const char *StackProbeSymbol =
18339 Subtarget->isTargetKnownWindowsMSVC() ? "_chkstk" : "_alloca";
18341 BuildMI(*BB, MI, DL, TII->get(X86::CALLpcrel32))
18342 .addExternalSymbol(StackProbeSymbol)
18343 .addReg(X86::EAX, RegState::Implicit)
18344 .addReg(X86::ESP, RegState::Implicit)
18345 .addReg(X86::EAX, RegState::Define | RegState::Implicit)
18346 .addReg(X86::ESP, RegState::Define | RegState::Implicit)
18347 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
18350 MI->eraseFromParent(); // The pseudo instruction is gone now.
18354 MachineBasicBlock *
18355 X86TargetLowering::EmitLoweredTLSCall(MachineInstr *MI,
18356 MachineBasicBlock *BB) const {
18357 // This is pretty easy. We're taking the value that we received from
18358 // our load from the relocation, sticking it in either RDI (x86-64)
18359 // or EAX and doing an indirect call. The return value will then
18360 // be in the normal return register.
18361 MachineFunction *F = BB->getParent();
18362 const X86InstrInfo *TII =
18363 static_cast<const X86InstrInfo *>(F->getSubtarget().getInstrInfo());
18364 DebugLoc DL = MI->getDebugLoc();
18366 assert(Subtarget->isTargetDarwin() && "Darwin only instr emitted?");
18367 assert(MI->getOperand(3).isGlobal() && "This should be a global");
18369 // Get a register mask for the lowered call.
18370 // FIXME: The 32-bit calls have non-standard calling conventions. Use a
18371 // proper register mask.
18372 const uint32_t *RegMask = F->getTarget()
18373 .getSubtargetImpl()
18374 ->getRegisterInfo()
18375 ->getCallPreservedMask(CallingConv::C);
18376 if (Subtarget->is64Bit()) {
18377 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
18378 TII->get(X86::MOV64rm), X86::RDI)
18380 .addImm(0).addReg(0)
18381 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
18382 MI->getOperand(3).getTargetFlags())
18384 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL64m));
18385 addDirectMem(MIB, X86::RDI);
18386 MIB.addReg(X86::RAX, RegState::ImplicitDefine).addRegMask(RegMask);
18387 } else if (F->getTarget().getRelocationModel() != Reloc::PIC_) {
18388 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
18389 TII->get(X86::MOV32rm), X86::EAX)
18391 .addImm(0).addReg(0)
18392 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
18393 MI->getOperand(3).getTargetFlags())
18395 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m));
18396 addDirectMem(MIB, X86::EAX);
18397 MIB.addReg(X86::EAX, RegState::ImplicitDefine).addRegMask(RegMask);
18399 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
18400 TII->get(X86::MOV32rm), X86::EAX)
18401 .addReg(TII->getGlobalBaseReg(F))
18402 .addImm(0).addReg(0)
18403 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
18404 MI->getOperand(3).getTargetFlags())
18406 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m));
18407 addDirectMem(MIB, X86::EAX);
18408 MIB.addReg(X86::EAX, RegState::ImplicitDefine).addRegMask(RegMask);
18411 MI->eraseFromParent(); // The pseudo instruction is gone now.
18415 MachineBasicBlock *
18416 X86TargetLowering::emitEHSjLjSetJmp(MachineInstr *MI,
18417 MachineBasicBlock *MBB) const {
18418 DebugLoc DL = MI->getDebugLoc();
18419 MachineFunction *MF = MBB->getParent();
18420 const TargetInstrInfo *TII = MF->getSubtarget().getInstrInfo();
18421 MachineRegisterInfo &MRI = MF->getRegInfo();
18423 const BasicBlock *BB = MBB->getBasicBlock();
18424 MachineFunction::iterator I = MBB;
18427 // Memory Reference
18428 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
18429 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
18432 unsigned MemOpndSlot = 0;
18434 unsigned CurOp = 0;
18436 DstReg = MI->getOperand(CurOp++).getReg();
18437 const TargetRegisterClass *RC = MRI.getRegClass(DstReg);
18438 assert(RC->hasType(MVT::i32) && "Invalid destination!");
18439 unsigned mainDstReg = MRI.createVirtualRegister(RC);
18440 unsigned restoreDstReg = MRI.createVirtualRegister(RC);
18442 MemOpndSlot = CurOp;
18444 MVT PVT = getPointerTy();
18445 assert((PVT == MVT::i64 || PVT == MVT::i32) &&
18446 "Invalid Pointer Size!");
18448 // For v = setjmp(buf), we generate
18451 // buf[LabelOffset] = restoreMBB
18452 // SjLjSetup restoreMBB
18458 // v = phi(main, restore)
18463 MachineBasicBlock *thisMBB = MBB;
18464 MachineBasicBlock *mainMBB = MF->CreateMachineBasicBlock(BB);
18465 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(BB);
18466 MachineBasicBlock *restoreMBB = MF->CreateMachineBasicBlock(BB);
18467 MF->insert(I, mainMBB);
18468 MF->insert(I, sinkMBB);
18469 MF->push_back(restoreMBB);
18471 MachineInstrBuilder MIB;
18473 // Transfer the remainder of BB and its successor edges to sinkMBB.
18474 sinkMBB->splice(sinkMBB->begin(), MBB,
18475 std::next(MachineBasicBlock::iterator(MI)), MBB->end());
18476 sinkMBB->transferSuccessorsAndUpdatePHIs(MBB);
18479 unsigned PtrStoreOpc = 0;
18480 unsigned LabelReg = 0;
18481 const int64_t LabelOffset = 1 * PVT.getStoreSize();
18482 Reloc::Model RM = MF->getTarget().getRelocationModel();
18483 bool UseImmLabel = (MF->getTarget().getCodeModel() == CodeModel::Small) &&
18484 (RM == Reloc::Static || RM == Reloc::DynamicNoPIC);
18486 // Prepare IP either in reg or imm.
18487 if (!UseImmLabel) {
18488 PtrStoreOpc = (PVT == MVT::i64) ? X86::MOV64mr : X86::MOV32mr;
18489 const TargetRegisterClass *PtrRC = getRegClassFor(PVT);
18490 LabelReg = MRI.createVirtualRegister(PtrRC);
18491 if (Subtarget->is64Bit()) {
18492 MIB = BuildMI(*thisMBB, MI, DL, TII->get(X86::LEA64r), LabelReg)
18496 .addMBB(restoreMBB)
18499 const X86InstrInfo *XII = static_cast<const X86InstrInfo*>(TII);
18500 MIB = BuildMI(*thisMBB, MI, DL, TII->get(X86::LEA32r), LabelReg)
18501 .addReg(XII->getGlobalBaseReg(MF))
18504 .addMBB(restoreMBB, Subtarget->ClassifyBlockAddressReference())
18508 PtrStoreOpc = (PVT == MVT::i64) ? X86::MOV64mi32 : X86::MOV32mi;
18510 MIB = BuildMI(*thisMBB, MI, DL, TII->get(PtrStoreOpc));
18511 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
18512 if (i == X86::AddrDisp)
18513 MIB.addDisp(MI->getOperand(MemOpndSlot + i), LabelOffset);
18515 MIB.addOperand(MI->getOperand(MemOpndSlot + i));
18518 MIB.addReg(LabelReg);
18520 MIB.addMBB(restoreMBB);
18521 MIB.setMemRefs(MMOBegin, MMOEnd);
18523 MIB = BuildMI(*thisMBB, MI, DL, TII->get(X86::EH_SjLj_Setup))
18524 .addMBB(restoreMBB);
18526 const X86RegisterInfo *RegInfo = static_cast<const X86RegisterInfo *>(
18527 MF->getSubtarget().getRegisterInfo());
18528 MIB.addRegMask(RegInfo->getNoPreservedMask());
18529 thisMBB->addSuccessor(mainMBB);
18530 thisMBB->addSuccessor(restoreMBB);
18534 BuildMI(mainMBB, DL, TII->get(X86::MOV32r0), mainDstReg);
18535 mainMBB->addSuccessor(sinkMBB);
18538 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
18539 TII->get(X86::PHI), DstReg)
18540 .addReg(mainDstReg).addMBB(mainMBB)
18541 .addReg(restoreDstReg).addMBB(restoreMBB);
18544 BuildMI(restoreMBB, DL, TII->get(X86::MOV32ri), restoreDstReg).addImm(1);
18545 BuildMI(restoreMBB, DL, TII->get(X86::JMP_4)).addMBB(sinkMBB);
18546 restoreMBB->addSuccessor(sinkMBB);
18548 MI->eraseFromParent();
18552 MachineBasicBlock *
18553 X86TargetLowering::emitEHSjLjLongJmp(MachineInstr *MI,
18554 MachineBasicBlock *MBB) const {
18555 DebugLoc DL = MI->getDebugLoc();
18556 MachineFunction *MF = MBB->getParent();
18557 const TargetInstrInfo *TII = MF->getSubtarget().getInstrInfo();
18558 MachineRegisterInfo &MRI = MF->getRegInfo();
18560 // Memory Reference
18561 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
18562 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
18564 MVT PVT = getPointerTy();
18565 assert((PVT == MVT::i64 || PVT == MVT::i32) &&
18566 "Invalid Pointer Size!");
18568 const TargetRegisterClass *RC =
18569 (PVT == MVT::i64) ? &X86::GR64RegClass : &X86::GR32RegClass;
18570 unsigned Tmp = MRI.createVirtualRegister(RC);
18571 // Since FP is only updated here but NOT referenced, it's treated as GPR.
18572 const X86RegisterInfo *RegInfo = static_cast<const X86RegisterInfo *>(
18573 MF->getSubtarget().getRegisterInfo());
18574 unsigned FP = (PVT == MVT::i64) ? X86::RBP : X86::EBP;
18575 unsigned SP = RegInfo->getStackRegister();
18577 MachineInstrBuilder MIB;
18579 const int64_t LabelOffset = 1 * PVT.getStoreSize();
18580 const int64_t SPOffset = 2 * PVT.getStoreSize();
18582 unsigned PtrLoadOpc = (PVT == MVT::i64) ? X86::MOV64rm : X86::MOV32rm;
18583 unsigned IJmpOpc = (PVT == MVT::i64) ? X86::JMP64r : X86::JMP32r;
18586 MIB = BuildMI(*MBB, MI, DL, TII->get(PtrLoadOpc), FP);
18587 for (unsigned i = 0; i < X86::AddrNumOperands; ++i)
18588 MIB.addOperand(MI->getOperand(i));
18589 MIB.setMemRefs(MMOBegin, MMOEnd);
18591 MIB = BuildMI(*MBB, MI, DL, TII->get(PtrLoadOpc), Tmp);
18592 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
18593 if (i == X86::AddrDisp)
18594 MIB.addDisp(MI->getOperand(i), LabelOffset);
18596 MIB.addOperand(MI->getOperand(i));
18598 MIB.setMemRefs(MMOBegin, MMOEnd);
18600 MIB = BuildMI(*MBB, MI, DL, TII->get(PtrLoadOpc), SP);
18601 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
18602 if (i == X86::AddrDisp)
18603 MIB.addDisp(MI->getOperand(i), SPOffset);
18605 MIB.addOperand(MI->getOperand(i));
18607 MIB.setMemRefs(MMOBegin, MMOEnd);
18609 BuildMI(*MBB, MI, DL, TII->get(IJmpOpc)).addReg(Tmp);
18611 MI->eraseFromParent();
18615 // Replace 213-type (isel default) FMA3 instructions with 231-type for
18616 // accumulator loops. Writing back to the accumulator allows the coalescer
18617 // to remove extra copies in the loop.
18618 MachineBasicBlock *
18619 X86TargetLowering::emitFMA3Instr(MachineInstr *MI,
18620 MachineBasicBlock *MBB) const {
18621 MachineOperand &AddendOp = MI->getOperand(3);
18623 // Bail out early if the addend isn't a register - we can't switch these.
18624 if (!AddendOp.isReg())
18627 MachineFunction &MF = *MBB->getParent();
18628 MachineRegisterInfo &MRI = MF.getRegInfo();
18630 // Check whether the addend is defined by a PHI:
18631 assert(MRI.hasOneDef(AddendOp.getReg()) && "Multiple defs in SSA?");
18632 MachineInstr &AddendDef = *MRI.def_instr_begin(AddendOp.getReg());
18633 if (!AddendDef.isPHI())
18636 // Look for the following pattern:
18638 // %addend = phi [%entry, 0], [%loop, %result]
18640 // %result<tied1> = FMA213 %m2<tied0>, %m1, %addend
18644 // %addend = phi [%entry, 0], [%loop, %result]
18646 // %result<tied1> = FMA231 %addend<tied0>, %m1, %m2
18648 for (unsigned i = 1, e = AddendDef.getNumOperands(); i < e; i += 2) {
18649 assert(AddendDef.getOperand(i).isReg());
18650 MachineOperand PHISrcOp = AddendDef.getOperand(i);
18651 MachineInstr &PHISrcInst = *MRI.def_instr_begin(PHISrcOp.getReg());
18652 if (&PHISrcInst == MI) {
18653 // Found a matching instruction.
18654 unsigned NewFMAOpc = 0;
18655 switch (MI->getOpcode()) {
18656 case X86::VFMADDPDr213r: NewFMAOpc = X86::VFMADDPDr231r; break;
18657 case X86::VFMADDPSr213r: NewFMAOpc = X86::VFMADDPSr231r; break;
18658 case X86::VFMADDSDr213r: NewFMAOpc = X86::VFMADDSDr231r; break;
18659 case X86::VFMADDSSr213r: NewFMAOpc = X86::VFMADDSSr231r; break;
18660 case X86::VFMSUBPDr213r: NewFMAOpc = X86::VFMSUBPDr231r; break;
18661 case X86::VFMSUBPSr213r: NewFMAOpc = X86::VFMSUBPSr231r; break;
18662 case X86::VFMSUBSDr213r: NewFMAOpc = X86::VFMSUBSDr231r; break;
18663 case X86::VFMSUBSSr213r: NewFMAOpc = X86::VFMSUBSSr231r; break;
18664 case X86::VFNMADDPDr213r: NewFMAOpc = X86::VFNMADDPDr231r; break;
18665 case X86::VFNMADDPSr213r: NewFMAOpc = X86::VFNMADDPSr231r; break;
18666 case X86::VFNMADDSDr213r: NewFMAOpc = X86::VFNMADDSDr231r; break;
18667 case X86::VFNMADDSSr213r: NewFMAOpc = X86::VFNMADDSSr231r; break;
18668 case X86::VFNMSUBPDr213r: NewFMAOpc = X86::VFNMSUBPDr231r; break;
18669 case X86::VFNMSUBPSr213r: NewFMAOpc = X86::VFNMSUBPSr231r; break;
18670 case X86::VFNMSUBSDr213r: NewFMAOpc = X86::VFNMSUBSDr231r; break;
18671 case X86::VFNMSUBSSr213r: NewFMAOpc = X86::VFNMSUBSSr231r; break;
18672 case X86::VFMADDPDr213rY: NewFMAOpc = X86::VFMADDPDr231rY; break;
18673 case X86::VFMADDPSr213rY: NewFMAOpc = X86::VFMADDPSr231rY; break;
18674 case X86::VFMSUBPDr213rY: NewFMAOpc = X86::VFMSUBPDr231rY; break;
18675 case X86::VFMSUBPSr213rY: NewFMAOpc = X86::VFMSUBPSr231rY; break;
18676 case X86::VFNMADDPDr213rY: NewFMAOpc = X86::VFNMADDPDr231rY; break;
18677 case X86::VFNMADDPSr213rY: NewFMAOpc = X86::VFNMADDPSr231rY; break;
18678 case X86::VFNMSUBPDr213rY: NewFMAOpc = X86::VFNMSUBPDr231rY; break;
18679 case X86::VFNMSUBPSr213rY: NewFMAOpc = X86::VFNMSUBPSr231rY; break;
18680 default: llvm_unreachable("Unrecognized FMA variant.");
18683 const TargetInstrInfo &TII = *MF.getSubtarget().getInstrInfo();
18684 MachineInstrBuilder MIB =
18685 BuildMI(MF, MI->getDebugLoc(), TII.get(NewFMAOpc))
18686 .addOperand(MI->getOperand(0))
18687 .addOperand(MI->getOperand(3))
18688 .addOperand(MI->getOperand(2))
18689 .addOperand(MI->getOperand(1));
18690 MBB->insert(MachineBasicBlock::iterator(MI), MIB);
18691 MI->eraseFromParent();
18698 MachineBasicBlock *
18699 X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
18700 MachineBasicBlock *BB) const {
18701 switch (MI->getOpcode()) {
18702 default: llvm_unreachable("Unexpected instr type to insert");
18703 case X86::TAILJMPd64:
18704 case X86::TAILJMPr64:
18705 case X86::TAILJMPm64:
18706 llvm_unreachable("TAILJMP64 would not be touched here.");
18707 case X86::TCRETURNdi64:
18708 case X86::TCRETURNri64:
18709 case X86::TCRETURNmi64:
18711 case X86::WIN_ALLOCA:
18712 return EmitLoweredWinAlloca(MI, BB);
18713 case X86::SEG_ALLOCA_32:
18714 return EmitLoweredSegAlloca(MI, BB, false);
18715 case X86::SEG_ALLOCA_64:
18716 return EmitLoweredSegAlloca(MI, BB, true);
18717 case X86::TLSCall_32:
18718 case X86::TLSCall_64:
18719 return EmitLoweredTLSCall(MI, BB);
18720 case X86::CMOV_GR8:
18721 case X86::CMOV_FR32:
18722 case X86::CMOV_FR64:
18723 case X86::CMOV_V4F32:
18724 case X86::CMOV_V2F64:
18725 case X86::CMOV_V2I64:
18726 case X86::CMOV_V8F32:
18727 case X86::CMOV_V4F64:
18728 case X86::CMOV_V4I64:
18729 case X86::CMOV_V16F32:
18730 case X86::CMOV_V8F64:
18731 case X86::CMOV_V8I64:
18732 case X86::CMOV_GR16:
18733 case X86::CMOV_GR32:
18734 case X86::CMOV_RFP32:
18735 case X86::CMOV_RFP64:
18736 case X86::CMOV_RFP80:
18737 return EmitLoweredSelect(MI, BB);
18739 case X86::FP32_TO_INT16_IN_MEM:
18740 case X86::FP32_TO_INT32_IN_MEM:
18741 case X86::FP32_TO_INT64_IN_MEM:
18742 case X86::FP64_TO_INT16_IN_MEM:
18743 case X86::FP64_TO_INT32_IN_MEM:
18744 case X86::FP64_TO_INT64_IN_MEM:
18745 case X86::FP80_TO_INT16_IN_MEM:
18746 case X86::FP80_TO_INT32_IN_MEM:
18747 case X86::FP80_TO_INT64_IN_MEM: {
18748 MachineFunction *F = BB->getParent();
18749 const TargetInstrInfo *TII = F->getSubtarget().getInstrInfo();
18750 DebugLoc DL = MI->getDebugLoc();
18752 // Change the floating point control register to use "round towards zero"
18753 // mode when truncating to an integer value.
18754 int CWFrameIdx = F->getFrameInfo()->CreateStackObject(2, 2, false);
18755 addFrameReference(BuildMI(*BB, MI, DL,
18756 TII->get(X86::FNSTCW16m)), CWFrameIdx);
18758 // Load the old value of the high byte of the control word...
18760 F->getRegInfo().createVirtualRegister(&X86::GR16RegClass);
18761 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16rm), OldCW),
18764 // Set the high part to be round to zero...
18765 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mi)), CWFrameIdx)
18768 // Reload the modified control word now...
18769 addFrameReference(BuildMI(*BB, MI, DL,
18770 TII->get(X86::FLDCW16m)), CWFrameIdx);
18772 // Restore the memory image of control word to original value
18773 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mr)), CWFrameIdx)
18776 // Get the X86 opcode to use.
18778 switch (MI->getOpcode()) {
18779 default: llvm_unreachable("illegal opcode!");
18780 case X86::FP32_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m32; break;
18781 case X86::FP32_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m32; break;
18782 case X86::FP32_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m32; break;
18783 case X86::FP64_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m64; break;
18784 case X86::FP64_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m64; break;
18785 case X86::FP64_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m64; break;
18786 case X86::FP80_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m80; break;
18787 case X86::FP80_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m80; break;
18788 case X86::FP80_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m80; break;
18792 MachineOperand &Op = MI->getOperand(0);
18794 AM.BaseType = X86AddressMode::RegBase;
18795 AM.Base.Reg = Op.getReg();
18797 AM.BaseType = X86AddressMode::FrameIndexBase;
18798 AM.Base.FrameIndex = Op.getIndex();
18800 Op = MI->getOperand(1);
18802 AM.Scale = Op.getImm();
18803 Op = MI->getOperand(2);
18805 AM.IndexReg = Op.getImm();
18806 Op = MI->getOperand(3);
18807 if (Op.isGlobal()) {
18808 AM.GV = Op.getGlobal();
18810 AM.Disp = Op.getImm();
18812 addFullAddress(BuildMI(*BB, MI, DL, TII->get(Opc)), AM)
18813 .addReg(MI->getOperand(X86::AddrNumOperands).getReg());
18815 // Reload the original control word now.
18816 addFrameReference(BuildMI(*BB, MI, DL,
18817 TII->get(X86::FLDCW16m)), CWFrameIdx);
18819 MI->eraseFromParent(); // The pseudo instruction is gone now.
18822 // String/text processing lowering.
18823 case X86::PCMPISTRM128REG:
18824 case X86::VPCMPISTRM128REG:
18825 case X86::PCMPISTRM128MEM:
18826 case X86::VPCMPISTRM128MEM:
18827 case X86::PCMPESTRM128REG:
18828 case X86::VPCMPESTRM128REG:
18829 case X86::PCMPESTRM128MEM:
18830 case X86::VPCMPESTRM128MEM:
18831 assert(Subtarget->hasSSE42() &&
18832 "Target must have SSE4.2 or AVX features enabled");
18833 return EmitPCMPSTRM(MI, BB, BB->getParent()->getSubtarget().getInstrInfo());
18835 // String/text processing lowering.
18836 case X86::PCMPISTRIREG:
18837 case X86::VPCMPISTRIREG:
18838 case X86::PCMPISTRIMEM:
18839 case X86::VPCMPISTRIMEM:
18840 case X86::PCMPESTRIREG:
18841 case X86::VPCMPESTRIREG:
18842 case X86::PCMPESTRIMEM:
18843 case X86::VPCMPESTRIMEM:
18844 assert(Subtarget->hasSSE42() &&
18845 "Target must have SSE4.2 or AVX features enabled");
18846 return EmitPCMPSTRI(MI, BB, BB->getParent()->getSubtarget().getInstrInfo());
18848 // Thread synchronization.
18850 return EmitMonitor(MI, BB, BB->getParent()->getSubtarget().getInstrInfo(),
18855 return EmitXBegin(MI, BB, BB->getParent()->getSubtarget().getInstrInfo());
18857 case X86::VASTART_SAVE_XMM_REGS:
18858 return EmitVAStartSaveXMMRegsWithCustomInserter(MI, BB);
18860 case X86::VAARG_64:
18861 return EmitVAARG64WithCustomInserter(MI, BB);
18863 case X86::EH_SjLj_SetJmp32:
18864 case X86::EH_SjLj_SetJmp64:
18865 return emitEHSjLjSetJmp(MI, BB);
18867 case X86::EH_SjLj_LongJmp32:
18868 case X86::EH_SjLj_LongJmp64:
18869 return emitEHSjLjLongJmp(MI, BB);
18871 case TargetOpcode::STACKMAP:
18872 case TargetOpcode::PATCHPOINT:
18873 return emitPatchPoint(MI, BB);
18875 case X86::VFMADDPDr213r:
18876 case X86::VFMADDPSr213r:
18877 case X86::VFMADDSDr213r:
18878 case X86::VFMADDSSr213r:
18879 case X86::VFMSUBPDr213r:
18880 case X86::VFMSUBPSr213r:
18881 case X86::VFMSUBSDr213r:
18882 case X86::VFMSUBSSr213r:
18883 case X86::VFNMADDPDr213r:
18884 case X86::VFNMADDPSr213r:
18885 case X86::VFNMADDSDr213r:
18886 case X86::VFNMADDSSr213r:
18887 case X86::VFNMSUBPDr213r:
18888 case X86::VFNMSUBPSr213r:
18889 case X86::VFNMSUBSDr213r:
18890 case X86::VFNMSUBSSr213r:
18891 case X86::VFMADDPDr213rY:
18892 case X86::VFMADDPSr213rY:
18893 case X86::VFMSUBPDr213rY:
18894 case X86::VFMSUBPSr213rY:
18895 case X86::VFNMADDPDr213rY:
18896 case X86::VFNMADDPSr213rY:
18897 case X86::VFNMSUBPDr213rY:
18898 case X86::VFNMSUBPSr213rY:
18899 return emitFMA3Instr(MI, BB);
18903 //===----------------------------------------------------------------------===//
18904 // X86 Optimization Hooks
18905 //===----------------------------------------------------------------------===//
18907 void X86TargetLowering::computeKnownBitsForTargetNode(const SDValue Op,
18910 const SelectionDAG &DAG,
18911 unsigned Depth) const {
18912 unsigned BitWidth = KnownZero.getBitWidth();
18913 unsigned Opc = Op.getOpcode();
18914 assert((Opc >= ISD::BUILTIN_OP_END ||
18915 Opc == ISD::INTRINSIC_WO_CHAIN ||
18916 Opc == ISD::INTRINSIC_W_CHAIN ||
18917 Opc == ISD::INTRINSIC_VOID) &&
18918 "Should use MaskedValueIsZero if you don't know whether Op"
18919 " is a target node!");
18921 KnownZero = KnownOne = APInt(BitWidth, 0); // Don't know anything.
18935 // These nodes' second result is a boolean.
18936 if (Op.getResNo() == 0)
18939 case X86ISD::SETCC:
18940 KnownZero |= APInt::getHighBitsSet(BitWidth, BitWidth - 1);
18942 case ISD::INTRINSIC_WO_CHAIN: {
18943 unsigned IntId = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
18944 unsigned NumLoBits = 0;
18947 case Intrinsic::x86_sse_movmsk_ps:
18948 case Intrinsic::x86_avx_movmsk_ps_256:
18949 case Intrinsic::x86_sse2_movmsk_pd:
18950 case Intrinsic::x86_avx_movmsk_pd_256:
18951 case Intrinsic::x86_mmx_pmovmskb:
18952 case Intrinsic::x86_sse2_pmovmskb_128:
18953 case Intrinsic::x86_avx2_pmovmskb: {
18954 // High bits of movmskp{s|d}, pmovmskb are known zero.
18956 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
18957 case Intrinsic::x86_sse_movmsk_ps: NumLoBits = 4; break;
18958 case Intrinsic::x86_avx_movmsk_ps_256: NumLoBits = 8; break;
18959 case Intrinsic::x86_sse2_movmsk_pd: NumLoBits = 2; break;
18960 case Intrinsic::x86_avx_movmsk_pd_256: NumLoBits = 4; break;
18961 case Intrinsic::x86_mmx_pmovmskb: NumLoBits = 8; break;
18962 case Intrinsic::x86_sse2_pmovmskb_128: NumLoBits = 16; break;
18963 case Intrinsic::x86_avx2_pmovmskb: NumLoBits = 32; break;
18965 KnownZero = APInt::getHighBitsSet(BitWidth, BitWidth - NumLoBits);
18974 unsigned X86TargetLowering::ComputeNumSignBitsForTargetNode(
18976 const SelectionDAG &,
18977 unsigned Depth) const {
18978 // SETCC_CARRY sets the dest to ~0 for true or 0 for false.
18979 if (Op.getOpcode() == X86ISD::SETCC_CARRY)
18980 return Op.getValueType().getScalarType().getSizeInBits();
18986 /// isGAPlusOffset - Returns true (and the GlobalValue and the offset) if the
18987 /// node is a GlobalAddress + offset.
18988 bool X86TargetLowering::isGAPlusOffset(SDNode *N,
18989 const GlobalValue* &GA,
18990 int64_t &Offset) const {
18991 if (N->getOpcode() == X86ISD::Wrapper) {
18992 if (isa<GlobalAddressSDNode>(N->getOperand(0))) {
18993 GA = cast<GlobalAddressSDNode>(N->getOperand(0))->getGlobal();
18994 Offset = cast<GlobalAddressSDNode>(N->getOperand(0))->getOffset();
18998 return TargetLowering::isGAPlusOffset(N, GA, Offset);
19001 /// isShuffleHigh128VectorInsertLow - Checks whether the shuffle node is the
19002 /// same as extracting the high 128-bit part of 256-bit vector and then
19003 /// inserting the result into the low part of a new 256-bit vector
19004 static bool isShuffleHigh128VectorInsertLow(ShuffleVectorSDNode *SVOp) {
19005 EVT VT = SVOp->getValueType(0);
19006 unsigned NumElems = VT.getVectorNumElements();
19008 // vector_shuffle <4, 5, 6, 7, u, u, u, u> or <2, 3, u, u>
19009 for (unsigned i = 0, j = NumElems/2; i != NumElems/2; ++i, ++j)
19010 if (!isUndefOrEqual(SVOp->getMaskElt(i), j) ||
19011 SVOp->getMaskElt(j) >= 0)
19017 /// isShuffleLow128VectorInsertHigh - Checks whether the shuffle node is the
19018 /// same as extracting the low 128-bit part of 256-bit vector and then
19019 /// inserting the result into the high part of a new 256-bit vector
19020 static bool isShuffleLow128VectorInsertHigh(ShuffleVectorSDNode *SVOp) {
19021 EVT VT = SVOp->getValueType(0);
19022 unsigned NumElems = VT.getVectorNumElements();
19024 // vector_shuffle <u, u, u, u, 0, 1, 2, 3> or <u, u, 0, 1>
19025 for (unsigned i = NumElems/2, j = 0; i != NumElems; ++i, ++j)
19026 if (!isUndefOrEqual(SVOp->getMaskElt(i), j) ||
19027 SVOp->getMaskElt(j) >= 0)
19033 /// PerformShuffleCombine256 - Performs shuffle combines for 256-bit vectors.
19034 static SDValue PerformShuffleCombine256(SDNode *N, SelectionDAG &DAG,
19035 TargetLowering::DAGCombinerInfo &DCI,
19036 const X86Subtarget* Subtarget) {
19038 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
19039 SDValue V1 = SVOp->getOperand(0);
19040 SDValue V2 = SVOp->getOperand(1);
19041 EVT VT = SVOp->getValueType(0);
19042 unsigned NumElems = VT.getVectorNumElements();
19044 if (V1.getOpcode() == ISD::CONCAT_VECTORS &&
19045 V2.getOpcode() == ISD::CONCAT_VECTORS) {
19049 // V UNDEF BUILD_VECTOR UNDEF
19051 // CONCAT_VECTOR CONCAT_VECTOR
19054 // RESULT: V + zero extended
19056 if (V2.getOperand(0).getOpcode() != ISD::BUILD_VECTOR ||
19057 V2.getOperand(1).getOpcode() != ISD::UNDEF ||
19058 V1.getOperand(1).getOpcode() != ISD::UNDEF)
19061 if (!ISD::isBuildVectorAllZeros(V2.getOperand(0).getNode()))
19064 // To match the shuffle mask, the first half of the mask should
19065 // be exactly the first vector, and all the rest a splat with the
19066 // first element of the second one.
19067 for (unsigned i = 0; i != NumElems/2; ++i)
19068 if (!isUndefOrEqual(SVOp->getMaskElt(i), i) ||
19069 !isUndefOrEqual(SVOp->getMaskElt(i+NumElems/2), NumElems))
19072 // If V1 is coming from a vector load then just fold to a VZEXT_LOAD.
19073 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(V1.getOperand(0))) {
19074 if (Ld->hasNUsesOfValue(1, 0)) {
19075 SDVTList Tys = DAG.getVTList(MVT::v4i64, MVT::Other);
19076 SDValue Ops[] = { Ld->getChain(), Ld->getBasePtr() };
19078 DAG.getMemIntrinsicNode(X86ISD::VZEXT_LOAD, dl, Tys, Ops,
19080 Ld->getPointerInfo(),
19081 Ld->getAlignment(),
19082 false/*isVolatile*/, true/*ReadMem*/,
19083 false/*WriteMem*/);
19085 // Make sure the newly-created LOAD is in the same position as Ld in
19086 // terms of dependency. We create a TokenFactor for Ld and ResNode,
19087 // and update uses of Ld's output chain to use the TokenFactor.
19088 if (Ld->hasAnyUseOfValue(1)) {
19089 SDValue NewChain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
19090 SDValue(Ld, 1), SDValue(ResNode.getNode(), 1));
19091 DAG.ReplaceAllUsesOfValueWith(SDValue(Ld, 1), NewChain);
19092 DAG.UpdateNodeOperands(NewChain.getNode(), SDValue(Ld, 1),
19093 SDValue(ResNode.getNode(), 1));
19096 return DAG.getNode(ISD::BITCAST, dl, VT, ResNode);
19100 // Emit a zeroed vector and insert the desired subvector on its
19102 SDValue Zeros = getZeroVector(VT, Subtarget, DAG, dl);
19103 SDValue InsV = Insert128BitVector(Zeros, V1.getOperand(0), 0, DAG, dl);
19104 return DCI.CombineTo(N, InsV);
19107 //===--------------------------------------------------------------------===//
19108 // Combine some shuffles into subvector extracts and inserts:
19111 // vector_shuffle <4, 5, 6, 7, u, u, u, u> or <2, 3, u, u>
19112 if (isShuffleHigh128VectorInsertLow(SVOp)) {
19113 SDValue V = Extract128BitVector(V1, NumElems/2, DAG, dl);
19114 SDValue InsV = Insert128BitVector(DAG.getUNDEF(VT), V, 0, DAG, dl);
19115 return DCI.CombineTo(N, InsV);
19118 // vector_shuffle <u, u, u, u, 0, 1, 2, 3> or <u, u, 0, 1>
19119 if (isShuffleLow128VectorInsertHigh(SVOp)) {
19120 SDValue V = Extract128BitVector(V1, 0, DAG, dl);
19121 SDValue InsV = Insert128BitVector(DAG.getUNDEF(VT), V, NumElems/2, DAG, dl);
19122 return DCI.CombineTo(N, InsV);
19128 /// \brief Combine an arbitrary chain of shuffles into a single instruction if
19131 /// This is the leaf of the recursive combinine below. When we have found some
19132 /// chain of single-use x86 shuffle instructions and accumulated the combined
19133 /// shuffle mask represented by them, this will try to pattern match that mask
19134 /// into either a single instruction if there is a special purpose instruction
19135 /// for this operation, or into a PSHUFB instruction which is a fully general
19136 /// instruction but should only be used to replace chains over a certain depth.
19137 static bool combineX86ShuffleChain(SDValue Op, SDValue Root, ArrayRef<int> Mask,
19138 int Depth, bool HasPSHUFB, SelectionDAG &DAG,
19139 TargetLowering::DAGCombinerInfo &DCI,
19140 const X86Subtarget *Subtarget) {
19141 assert(!Mask.empty() && "Cannot combine an empty shuffle mask!");
19143 // Find the operand that enters the chain. Note that multiple uses are OK
19144 // here, we're not going to remove the operand we find.
19145 SDValue Input = Op.getOperand(0);
19146 while (Input.getOpcode() == ISD::BITCAST)
19147 Input = Input.getOperand(0);
19149 MVT VT = Input.getSimpleValueType();
19150 MVT RootVT = Root.getSimpleValueType();
19153 // Just remove no-op shuffle masks.
19154 if (Mask.size() == 1) {
19155 DCI.CombineTo(Root.getNode(), DAG.getNode(ISD::BITCAST, DL, RootVT, Input),
19160 // Use the float domain if the operand type is a floating point type.
19161 bool FloatDomain = VT.isFloatingPoint();
19163 // If we don't have access to VEX encodings, the generic PSHUF instructions
19164 // are preferable to some of the specialized forms despite requiring one more
19165 // byte to encode because they can implicitly copy.
19167 // IF we *do* have VEX encodings, than we can use shorter, more specific
19168 // shuffle instructions freely as they can copy due to the extra register
19170 if (Subtarget->hasAVX()) {
19171 // We have both floating point and integer variants of shuffles that dup
19172 // either the low or high half of the vector.
19173 if (Mask.equals(0, 0) || Mask.equals(1, 1)) {
19174 bool Lo = Mask.equals(0, 0);
19175 unsigned Shuffle = FloatDomain ? (Lo ? X86ISD::MOVLHPS : X86ISD::MOVHLPS)
19176 : (Lo ? X86ISD::UNPCKL : X86ISD::UNPCKH);
19177 if (Depth == 1 && Root->getOpcode() == Shuffle)
19178 return false; // Nothing to do!
19179 MVT ShuffleVT = FloatDomain ? MVT::v4f32 : MVT::v2i64;
19180 Op = DAG.getNode(ISD::BITCAST, DL, ShuffleVT, Input);
19181 DCI.AddToWorklist(Op.getNode());
19182 Op = DAG.getNode(Shuffle, DL, ShuffleVT, Op, Op);
19183 DCI.AddToWorklist(Op.getNode());
19184 DCI.CombineTo(Root.getNode(), DAG.getNode(ISD::BITCAST, DL, RootVT, Op),
19189 // FIXME: We should match UNPCKLPS and UNPCKHPS here.
19191 // For the integer domain we have specialized instructions for duplicating
19192 // any element size from the low or high half.
19193 if (!FloatDomain &&
19194 (Mask.equals(0, 0, 1, 1) || Mask.equals(2, 2, 3, 3) ||
19195 Mask.equals(0, 0, 1, 1, 2, 2, 3, 3) ||
19196 Mask.equals(4, 4, 5, 5, 6, 6, 7, 7) ||
19197 Mask.equals(0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7) ||
19198 Mask.equals(8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15,
19200 bool Lo = Mask[0] == 0;
19201 unsigned Shuffle = Lo ? X86ISD::UNPCKL : X86ISD::UNPCKH;
19202 if (Depth == 1 && Root->getOpcode() == Shuffle)
19203 return false; // Nothing to do!
19205 switch (Mask.size()) {
19206 case 4: ShuffleVT = MVT::v4i32; break;
19207 case 8: ShuffleVT = MVT::v8i16; break;
19208 case 16: ShuffleVT = MVT::v16i8; break;
19210 Op = DAG.getNode(ISD::BITCAST, DL, ShuffleVT, Input);
19211 DCI.AddToWorklist(Op.getNode());
19212 Op = DAG.getNode(Shuffle, DL, ShuffleVT, Op, Op);
19213 DCI.AddToWorklist(Op.getNode());
19214 DCI.CombineTo(Root.getNode(), DAG.getNode(ISD::BITCAST, DL, RootVT, Op),
19220 // Don't try to re-form single instruction chains under any circumstances now
19221 // that we've done encoding canonicalization for them.
19225 // If we have 3 or more shuffle instructions or a chain involving PSHUFB, we
19226 // can replace them with a single PSHUFB instruction profitably. Intel's
19227 // manuals suggest only using PSHUFB if doing so replacing 5 instructions, but
19228 // in practice PSHUFB tends to be *very* fast so we're more aggressive.
19229 if ((Depth >= 3 || HasPSHUFB) && Subtarget->hasSSSE3()) {
19230 SmallVector<SDValue, 16> PSHUFBMask;
19231 assert(Mask.size() <= 16 && "Can't shuffle elements smaller than bytes!");
19232 int Ratio = 16 / Mask.size();
19233 for (unsigned i = 0; i < 16; ++i) {
19234 int M = Ratio * Mask[i / Ratio] + i % Ratio;
19235 PSHUFBMask.push_back(DAG.getConstant(M, MVT::i8));
19237 Op = DAG.getNode(ISD::BITCAST, DL, MVT::v16i8, Input);
19238 DCI.AddToWorklist(Op.getNode());
19239 SDValue PSHUFBMaskOp =
19240 DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v16i8, PSHUFBMask);
19241 DCI.AddToWorklist(PSHUFBMaskOp.getNode());
19242 Op = DAG.getNode(X86ISD::PSHUFB, DL, MVT::v16i8, Op, PSHUFBMaskOp);
19243 DCI.AddToWorklist(Op.getNode());
19244 DCI.CombineTo(Root.getNode(), DAG.getNode(ISD::BITCAST, DL, RootVT, Op),
19249 // Failed to find any combines.
19253 /// \brief Fully generic combining of x86 shuffle instructions.
19255 /// This should be the last combine run over the x86 shuffle instructions. Once
19256 /// they have been fully optimized, this will recursively consider all chains
19257 /// of single-use shuffle instructions, build a generic model of the cumulative
19258 /// shuffle operation, and check for simpler instructions which implement this
19259 /// operation. We use this primarily for two purposes:
19261 /// 1) Collapse generic shuffles to specialized single instructions when
19262 /// equivalent. In most cases, this is just an encoding size win, but
19263 /// sometimes we will collapse multiple generic shuffles into a single
19264 /// special-purpose shuffle.
19265 /// 2) Look for sequences of shuffle instructions with 3 or more total
19266 /// instructions, and replace them with the slightly more expensive SSSE3
19267 /// PSHUFB instruction if available. We do this as the last combining step
19268 /// to ensure we avoid using PSHUFB if we can implement the shuffle with
19269 /// a suitable short sequence of other instructions. The PHUFB will either
19270 /// use a register or have to read from memory and so is slightly (but only
19271 /// slightly) more expensive than the other shuffle instructions.
19273 /// Because this is inherently a quadratic operation (for each shuffle in
19274 /// a chain, we recurse up the chain), the depth is limited to 8 instructions.
19275 /// This should never be an issue in practice as the shuffle lowering doesn't
19276 /// produce sequences of more than 8 instructions.
19278 /// FIXME: We will currently miss some cases where the redundant shuffling
19279 /// would simplify under the threshold for PSHUFB formation because of
19280 /// combine-ordering. To fix this, we should do the redundant instruction
19281 /// combining in this recursive walk.
19282 static bool combineX86ShufflesRecursively(SDValue Op, SDValue Root,
19283 ArrayRef<int> IncomingMask, int Depth,
19284 bool HasPSHUFB, SelectionDAG &DAG,
19285 TargetLowering::DAGCombinerInfo &DCI,
19286 const X86Subtarget *Subtarget) {
19287 // Bound the depth of our recursive combine because this is ultimately
19288 // quadratic in nature.
19292 // Directly rip through bitcasts to find the underlying operand.
19293 while (Op.getOpcode() == ISD::BITCAST && Op.getOperand(0).hasOneUse())
19294 Op = Op.getOperand(0);
19296 MVT VT = Op.getSimpleValueType();
19297 if (!VT.isVector())
19298 return false; // Bail if we hit a non-vector.
19299 // FIXME: This routine should be taught about 256-bit shuffles, or a 256-bit
19300 // version should be added.
19301 if (VT.getSizeInBits() != 128)
19304 assert(Root.getSimpleValueType().isVector() &&
19305 "Shuffles operate on vector types!");
19306 assert(VT.getSizeInBits() == Root.getSimpleValueType().getSizeInBits() &&
19307 "Can only combine shuffles of the same vector register size.");
19309 if (!isTargetShuffle(Op.getOpcode()))
19311 SmallVector<int, 16> OpMask;
19313 bool HaveMask = getTargetShuffleMask(Op.getNode(), VT, OpMask, IsUnary);
19314 // We only can combine unary shuffles which we can decode the mask for.
19315 if (!HaveMask || !IsUnary)
19318 assert(VT.getVectorNumElements() == OpMask.size() &&
19319 "Different mask size from vector size!");
19321 SmallVector<int, 16> Mask;
19322 Mask.reserve(std::max(OpMask.size(), IncomingMask.size()));
19324 // Merge this shuffle operation's mask into our accumulated mask. This is
19325 // a bit tricky as the shuffle may have a different size from the root.
19326 if (OpMask.size() == IncomingMask.size()) {
19327 for (int M : IncomingMask)
19328 Mask.push_back(OpMask[M]);
19329 } else if (OpMask.size() < IncomingMask.size()) {
19330 assert(IncomingMask.size() % OpMask.size() == 0 &&
19331 "The smaller number of elements must divide the larger.");
19332 int Ratio = IncomingMask.size() / OpMask.size();
19333 for (int M : IncomingMask)
19334 Mask.push_back(Ratio * OpMask[M / Ratio] + M % Ratio);
19336 assert(OpMask.size() > IncomingMask.size() && "All other cases handled!");
19337 assert(OpMask.size() % IncomingMask.size() == 0 &&
19338 "The smaller number of elements must divide the larger.");
19339 int Ratio = OpMask.size() / IncomingMask.size();
19340 for (int i = 0, e = OpMask.size(); i < e; ++i)
19341 Mask.push_back(OpMask[Ratio * IncomingMask[i / Ratio] + i % Ratio]);
19344 // See if we can recurse into the operand to combine more things.
19345 switch (Op.getOpcode()) {
19346 case X86ISD::PSHUFB:
19348 case X86ISD::PSHUFD:
19349 case X86ISD::PSHUFHW:
19350 case X86ISD::PSHUFLW:
19351 if (Op.getOperand(0).hasOneUse() &&
19352 combineX86ShufflesRecursively(Op.getOperand(0), Root, Mask, Depth + 1,
19353 HasPSHUFB, DAG, DCI, Subtarget))
19357 case X86ISD::UNPCKL:
19358 case X86ISD::UNPCKH:
19359 assert(Op.getOperand(0) == Op.getOperand(1) && "We only combine unary shuffles!");
19360 // We can't check for single use, we have to check that this shuffle is the only user.
19361 if (Op->isOnlyUserOf(Op.getOperand(0).getNode()) &&
19362 combineX86ShufflesRecursively(Op.getOperand(0), Root, Mask, Depth + 1,
19363 HasPSHUFB, DAG, DCI, Subtarget))
19368 // Minor canonicalization of the accumulated shuffle mask to make it easier
19369 // to match below. All this does is detect masks with squential pairs of
19370 // elements, and shrink them to the half-width mask. It does this in a loop
19371 // so it will reduce the size of the mask to the minimal width mask which
19372 // performs an equivalent shuffle.
19373 while (Mask.size() > 1) {
19374 SmallVector<int, 16> NewMask;
19375 for (int i = 0, e = Mask.size()/2; i < e; ++i) {
19376 if (Mask[2*i] % 2 != 0 || Mask[2*i] != Mask[2*i + 1] + 1) {
19380 NewMask.push_back(Mask[2*i] / 2);
19382 if (NewMask.empty())
19384 Mask.swap(NewMask);
19387 return combineX86ShuffleChain(Op, Root, Mask, Depth, HasPSHUFB, DAG, DCI,
19391 /// \brief Get the PSHUF-style mask from PSHUF node.
19393 /// This is a very minor wrapper around getTargetShuffleMask to easy forming v4
19394 /// PSHUF-style masks that can be reused with such instructions.
19395 static SmallVector<int, 4> getPSHUFShuffleMask(SDValue N) {
19396 SmallVector<int, 4> Mask;
19398 bool HaveMask = getTargetShuffleMask(N.getNode(), N.getSimpleValueType(), Mask, IsUnary);
19402 switch (N.getOpcode()) {
19403 case X86ISD::PSHUFD:
19405 case X86ISD::PSHUFLW:
19408 case X86ISD::PSHUFHW:
19409 Mask.erase(Mask.begin(), Mask.begin() + 4);
19410 for (int &M : Mask)
19414 llvm_unreachable("No valid shuffle instruction found!");
19418 /// \brief Search for a combinable shuffle across a chain ending in pshufd.
19420 /// We walk up the chain and look for a combinable shuffle, skipping over
19421 /// shuffles that we could hoist this shuffle's transformation past without
19422 /// altering anything.
19423 static bool combineRedundantDWordShuffle(SDValue N, MutableArrayRef<int> Mask,
19425 TargetLowering::DAGCombinerInfo &DCI) {
19426 assert(N.getOpcode() == X86ISD::PSHUFD &&
19427 "Called with something other than an x86 128-bit half shuffle!");
19430 // Walk up a single-use chain looking for a combinable shuffle.
19431 SDValue V = N.getOperand(0);
19432 for (; V.hasOneUse(); V = V.getOperand(0)) {
19433 switch (V.getOpcode()) {
19435 return false; // Nothing combined!
19438 // Skip bitcasts as we always know the type for the target specific
19442 case X86ISD::PSHUFD:
19443 // Found another dword shuffle.
19446 case X86ISD::PSHUFLW:
19447 // Check that the low words (being shuffled) are the identity in the
19448 // dword shuffle, and the high words are self-contained.
19449 if (Mask[0] != 0 || Mask[1] != 1 ||
19450 !(Mask[2] >= 2 && Mask[2] < 4 && Mask[3] >= 2 && Mask[3] < 4))
19455 case X86ISD::PSHUFHW:
19456 // Check that the high words (being shuffled) are the identity in the
19457 // dword shuffle, and the low words are self-contained.
19458 if (Mask[2] != 2 || Mask[3] != 3 ||
19459 !(Mask[0] >= 0 && Mask[0] < 2 && Mask[1] >= 0 && Mask[1] < 2))
19464 case X86ISD::UNPCKL:
19465 case X86ISD::UNPCKH:
19466 // For either i8 -> i16 or i16 -> i32 unpacks, we can combine a dword
19467 // shuffle into a preceding word shuffle.
19468 if (V.getValueType() != MVT::v16i8 && V.getValueType() != MVT::v8i16)
19471 // Search for a half-shuffle which we can combine with.
19472 unsigned CombineOp =
19473 V.getOpcode() == X86ISD::UNPCKL ? X86ISD::PSHUFLW : X86ISD::PSHUFHW;
19474 if (V.getOperand(0) != V.getOperand(1) ||
19475 !V->isOnlyUserOf(V.getOperand(0).getNode()))
19477 V = V.getOperand(0);
19479 switch (V.getOpcode()) {
19481 return false; // Nothing to combine.
19483 case X86ISD::PSHUFLW:
19484 case X86ISD::PSHUFHW:
19485 if (V.getOpcode() == CombineOp)
19490 V = V.getOperand(0);
19494 } while (V.hasOneUse());
19497 // Break out of the loop if we break out of the switch.
19501 if (!V.hasOneUse())
19502 // We fell out of the loop without finding a viable combining instruction.
19505 // Record the old value to use in RAUW-ing.
19508 // Merge this node's mask and our incoming mask.
19509 SmallVector<int, 4> VMask = getPSHUFShuffleMask(V);
19510 for (int &M : Mask)
19512 V = DAG.getNode(V.getOpcode(), DL, V.getValueType(), V.getOperand(0),
19513 getV4X86ShuffleImm8ForMask(Mask, DAG));
19515 // It is possible that one of the combinable shuffles was completely absorbed
19516 // by the other, just replace it and revisit all users in that case.
19517 if (Old.getNode() == V.getNode()) {
19518 DCI.CombineTo(N.getNode(), N.getOperand(0), /*AddTo=*/true);
19522 // Replace N with its operand as we're going to combine that shuffle away.
19523 DAG.ReplaceAllUsesWith(N, N.getOperand(0));
19525 // Replace the combinable shuffle with the combined one, updating all users
19526 // so that we re-evaluate the chain here.
19527 DCI.CombineTo(Old.getNode(), V, /*AddTo*/ true);
19531 /// \brief Search for a combinable shuffle across a chain ending in pshuflw or pshufhw.
19533 /// We walk up the chain, skipping shuffles of the other half and looking
19534 /// through shuffles which switch halves trying to find a shuffle of the same
19535 /// pair of dwords.
19536 static bool combineRedundantHalfShuffle(SDValue N, MutableArrayRef<int> Mask,
19538 TargetLowering::DAGCombinerInfo &DCI) {
19540 (N.getOpcode() == X86ISD::PSHUFLW || N.getOpcode() == X86ISD::PSHUFHW) &&
19541 "Called with something other than an x86 128-bit half shuffle!");
19543 unsigned CombineOpcode = N.getOpcode();
19545 // Walk up a single-use chain looking for a combinable shuffle.
19546 SDValue V = N.getOperand(0);
19547 for (; V.hasOneUse(); V = V.getOperand(0)) {
19548 switch (V.getOpcode()) {
19550 return false; // Nothing combined!
19553 // Skip bitcasts as we always know the type for the target specific
19557 case X86ISD::PSHUFLW:
19558 case X86ISD::PSHUFHW:
19559 if (V.getOpcode() == CombineOpcode)
19562 // Other-half shuffles are no-ops.
19565 // Break out of the loop if we break out of the switch.
19569 if (!V.hasOneUse())
19570 // We fell out of the loop without finding a viable combining instruction.
19573 // Combine away the bottom node as its shuffle will be accumulated into
19574 // a preceding shuffle.
19575 DCI.CombineTo(N.getNode(), N.getOperand(0), /*AddTo*/ true);
19577 // Record the old value.
19580 // Merge this node's mask and our incoming mask (adjusted to account for all
19581 // the pshufd instructions encountered).
19582 SmallVector<int, 4> VMask = getPSHUFShuffleMask(V);
19583 for (int &M : Mask)
19585 V = DAG.getNode(V.getOpcode(), DL, MVT::v8i16, V.getOperand(0),
19586 getV4X86ShuffleImm8ForMask(Mask, DAG));
19588 // Check that the shuffles didn't cancel each other out. If not, we need to
19589 // combine to the new one.
19591 // Replace the combinable shuffle with the combined one, updating all users
19592 // so that we re-evaluate the chain here.
19593 DCI.CombineTo(Old.getNode(), V, /*AddTo*/ true);
19598 /// \brief Try to combine x86 target specific shuffles.
19599 static SDValue PerformTargetShuffleCombine(SDValue N, SelectionDAG &DAG,
19600 TargetLowering::DAGCombinerInfo &DCI,
19601 const X86Subtarget *Subtarget) {
19603 MVT VT = N.getSimpleValueType();
19604 SmallVector<int, 4> Mask;
19606 switch (N.getOpcode()) {
19607 case X86ISD::PSHUFD:
19608 case X86ISD::PSHUFLW:
19609 case X86ISD::PSHUFHW:
19610 Mask = getPSHUFShuffleMask(N);
19611 assert(Mask.size() == 4);
19617 // Nuke no-op shuffles that show up after combining.
19618 if (isNoopShuffleMask(Mask))
19619 return DCI.CombineTo(N.getNode(), N.getOperand(0), /*AddTo*/ true);
19621 // Look for simplifications involving one or two shuffle instructions.
19622 SDValue V = N.getOperand(0);
19623 switch (N.getOpcode()) {
19626 case X86ISD::PSHUFLW:
19627 case X86ISD::PSHUFHW:
19628 assert(VT == MVT::v8i16);
19631 if (combineRedundantHalfShuffle(N, Mask, DAG, DCI))
19632 return SDValue(); // We combined away this shuffle, so we're done.
19634 // See if this reduces to a PSHUFD which is no more expensive and can
19635 // combine with more operations.
19636 if (canWidenShuffleElements(Mask)) {
19637 int DMask[] = {-1, -1, -1, -1};
19638 int DOffset = N.getOpcode() == X86ISD::PSHUFLW ? 0 : 2;
19639 DMask[DOffset + 0] = DOffset + Mask[0] / 2;
19640 DMask[DOffset + 1] = DOffset + Mask[2] / 2;
19641 V = DAG.getNode(ISD::BITCAST, DL, MVT::v4i32, V);
19642 DCI.AddToWorklist(V.getNode());
19643 V = DAG.getNode(X86ISD::PSHUFD, DL, MVT::v4i32, V,
19644 getV4X86ShuffleImm8ForMask(DMask, DAG));
19645 DCI.AddToWorklist(V.getNode());
19646 return DAG.getNode(ISD::BITCAST, DL, MVT::v8i16, V);
19649 // Look for shuffle patterns which can be implemented as a single unpack.
19650 // FIXME: This doesn't handle the location of the PSHUFD generically, and
19651 // only works when we have a PSHUFD followed by two half-shuffles.
19652 if (Mask[0] == Mask[1] && Mask[2] == Mask[3] &&
19653 (V.getOpcode() == X86ISD::PSHUFLW ||
19654 V.getOpcode() == X86ISD::PSHUFHW) &&
19655 V.getOpcode() != N.getOpcode() &&
19657 SDValue D = V.getOperand(0);
19658 while (D.getOpcode() == ISD::BITCAST && D.hasOneUse())
19659 D = D.getOperand(0);
19660 if (D.getOpcode() == X86ISD::PSHUFD && D.hasOneUse()) {
19661 SmallVector<int, 4> VMask = getPSHUFShuffleMask(V);
19662 SmallVector<int, 4> DMask = getPSHUFShuffleMask(D);
19663 int NOffset = N.getOpcode() == X86ISD::PSHUFLW ? 0 : 4;
19664 int VOffset = V.getOpcode() == X86ISD::PSHUFLW ? 0 : 4;
19666 for (int i = 0; i < 4; ++i) {
19667 WordMask[i + NOffset] = Mask[i] + NOffset;
19668 WordMask[i + VOffset] = VMask[i] + VOffset;
19670 // Map the word mask through the DWord mask.
19672 for (int i = 0; i < 8; ++i)
19673 MappedMask[i] = 2 * DMask[WordMask[i] / 2] + WordMask[i] % 2;
19674 const int UnpackLoMask[] = {0, 0, 1, 1, 2, 2, 3, 3};
19675 const int UnpackHiMask[] = {4, 4, 5, 5, 6, 6, 7, 7};
19676 if (std::equal(std::begin(MappedMask), std::end(MappedMask),
19677 std::begin(UnpackLoMask)) ||
19678 std::equal(std::begin(MappedMask), std::end(MappedMask),
19679 std::begin(UnpackHiMask))) {
19680 // We can replace all three shuffles with an unpack.
19681 V = DAG.getNode(ISD::BITCAST, DL, MVT::v8i16, D.getOperand(0));
19682 DCI.AddToWorklist(V.getNode());
19683 return DAG.getNode(MappedMask[0] == 0 ? X86ISD::UNPCKL
19685 DL, MVT::v8i16, V, V);
19692 case X86ISD::PSHUFD:
19693 if (combineRedundantDWordShuffle(N, Mask, DAG, DCI))
19694 return SDValue(); // We combined away this shuffle.
19702 /// PerformShuffleCombine - Performs several different shuffle combines.
19703 static SDValue PerformShuffleCombine(SDNode *N, SelectionDAG &DAG,
19704 TargetLowering::DAGCombinerInfo &DCI,
19705 const X86Subtarget *Subtarget) {
19707 SDValue N0 = N->getOperand(0);
19708 SDValue N1 = N->getOperand(1);
19709 EVT VT = N->getValueType(0);
19711 // Don't create instructions with illegal types after legalize types has run.
19712 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
19713 if (!DCI.isBeforeLegalize() && !TLI.isTypeLegal(VT.getVectorElementType()))
19716 // Combine 256-bit vector shuffles. This is only profitable when in AVX mode
19717 if (Subtarget->hasFp256() && VT.is256BitVector() &&
19718 N->getOpcode() == ISD::VECTOR_SHUFFLE)
19719 return PerformShuffleCombine256(N, DAG, DCI, Subtarget);
19721 // During Type Legalization, when promoting illegal vector types,
19722 // the backend might introduce new shuffle dag nodes and bitcasts.
19724 // This code performs the following transformation:
19725 // fold: (shuffle (bitcast (BINOP A, B)), Undef, <Mask>) ->
19726 // (shuffle (BINOP (bitcast A), (bitcast B)), Undef, <Mask>)
19728 // We do this only if both the bitcast and the BINOP dag nodes have
19729 // one use. Also, perform this transformation only if the new binary
19730 // operation is legal. This is to avoid introducing dag nodes that
19731 // potentially need to be further expanded (or custom lowered) into a
19732 // less optimal sequence of dag nodes.
19733 if (!DCI.isBeforeLegalize() && DCI.isBeforeLegalizeOps() &&
19734 N1.getOpcode() == ISD::UNDEF && N0.hasOneUse() &&
19735 N0.getOpcode() == ISD::BITCAST) {
19736 SDValue BC0 = N0.getOperand(0);
19737 EVT SVT = BC0.getValueType();
19738 unsigned Opcode = BC0.getOpcode();
19739 unsigned NumElts = VT.getVectorNumElements();
19741 if (BC0.hasOneUse() && SVT.isVector() &&
19742 SVT.getVectorNumElements() * 2 == NumElts &&
19743 TLI.isOperationLegal(Opcode, VT)) {
19744 bool CanFold = false;
19756 unsigned SVTNumElts = SVT.getVectorNumElements();
19757 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
19758 for (unsigned i = 0, e = SVTNumElts; i != e && CanFold; ++i)
19759 CanFold = SVOp->getMaskElt(i) == (int)(i * 2);
19760 for (unsigned i = SVTNumElts, e = NumElts; i != e && CanFold; ++i)
19761 CanFold = SVOp->getMaskElt(i) < 0;
19764 SDValue BC00 = DAG.getNode(ISD::BITCAST, dl, VT, BC0.getOperand(0));
19765 SDValue BC01 = DAG.getNode(ISD::BITCAST, dl, VT, BC0.getOperand(1));
19766 SDValue NewBinOp = DAG.getNode(BC0.getOpcode(), dl, VT, BC00, BC01);
19767 return DAG.getVectorShuffle(VT, dl, NewBinOp, N1, &SVOp->getMask()[0]);
19772 // Only handle 128 wide vector from here on.
19773 if (!VT.is128BitVector())
19776 // Combine a vector_shuffle that is equal to build_vector load1, load2, load3,
19777 // load4, <0, 1, 2, 3> into a 128-bit load if the load addresses are
19778 // consecutive, non-overlapping, and in the right order.
19779 SmallVector<SDValue, 16> Elts;
19780 for (unsigned i = 0, e = VT.getVectorNumElements(); i != e; ++i)
19781 Elts.push_back(getShuffleScalarElt(N, i, DAG, 0));
19783 SDValue LD = EltsFromConsecutiveLoads(VT, Elts, dl, DAG, true);
19787 if (isTargetShuffle(N->getOpcode())) {
19789 PerformTargetShuffleCombine(SDValue(N, 0), DAG, DCI, Subtarget);
19790 if (Shuffle.getNode())
19793 // Try recursively combining arbitrary sequences of x86 shuffle
19794 // instructions into higher-order shuffles. We do this after combining
19795 // specific PSHUF instruction sequences into their minimal form so that we
19796 // can evaluate how many specialized shuffle instructions are involved in
19797 // a particular chain.
19798 SmallVector<int, 1> NonceMask; // Just a placeholder.
19799 NonceMask.push_back(0);
19800 if (combineX86ShufflesRecursively(SDValue(N, 0), SDValue(N, 0), NonceMask,
19801 /*Depth*/ 1, /*HasPSHUFB*/ false, DAG,
19803 return SDValue(); // This routine will use CombineTo to replace N.
19809 /// PerformTruncateCombine - Converts truncate operation to
19810 /// a sequence of vector shuffle operations.
19811 /// It is possible when we truncate 256-bit vector to 128-bit vector
19812 static SDValue PerformTruncateCombine(SDNode *N, SelectionDAG &DAG,
19813 TargetLowering::DAGCombinerInfo &DCI,
19814 const X86Subtarget *Subtarget) {
19818 /// XFormVExtractWithShuffleIntoLoad - Check if a vector extract from a target
19819 /// specific shuffle of a load can be folded into a single element load.
19820 /// Similar handling for VECTOR_SHUFFLE is performed by DAGCombiner, but
19821 /// shuffles have been customed lowered so we need to handle those here.
19822 static SDValue XFormVExtractWithShuffleIntoLoad(SDNode *N, SelectionDAG &DAG,
19823 TargetLowering::DAGCombinerInfo &DCI) {
19824 if (DCI.isBeforeLegalizeOps())
19827 SDValue InVec = N->getOperand(0);
19828 SDValue EltNo = N->getOperand(1);
19830 if (!isa<ConstantSDNode>(EltNo))
19833 EVT VT = InVec.getValueType();
19835 bool HasShuffleIntoBitcast = false;
19836 if (InVec.getOpcode() == ISD::BITCAST) {
19837 // Don't duplicate a load with other uses.
19838 if (!InVec.hasOneUse())
19840 EVT BCVT = InVec.getOperand(0).getValueType();
19841 if (BCVT.getVectorNumElements() != VT.getVectorNumElements())
19843 InVec = InVec.getOperand(0);
19844 HasShuffleIntoBitcast = true;
19847 if (!isTargetShuffle(InVec.getOpcode()))
19850 // Don't duplicate a load with other uses.
19851 if (!InVec.hasOneUse())
19854 SmallVector<int, 16> ShuffleMask;
19856 if (!getTargetShuffleMask(InVec.getNode(), VT.getSimpleVT(), ShuffleMask,
19860 // Select the input vector, guarding against out of range extract vector.
19861 unsigned NumElems = VT.getVectorNumElements();
19862 int Elt = cast<ConstantSDNode>(EltNo)->getZExtValue();
19863 int Idx = (Elt > (int)NumElems) ? -1 : ShuffleMask[Elt];
19864 SDValue LdNode = (Idx < (int)NumElems) ? InVec.getOperand(0)
19865 : InVec.getOperand(1);
19867 // If inputs to shuffle are the same for both ops, then allow 2 uses
19868 unsigned AllowedUses = InVec.getOperand(0) == InVec.getOperand(1) ? 2 : 1;
19870 if (LdNode.getOpcode() == ISD::BITCAST) {
19871 // Don't duplicate a load with other uses.
19872 if (!LdNode.getNode()->hasNUsesOfValue(AllowedUses, 0))
19875 AllowedUses = 1; // only allow 1 load use if we have a bitcast
19876 LdNode = LdNode.getOperand(0);
19879 if (!ISD::isNormalLoad(LdNode.getNode()))
19882 LoadSDNode *LN0 = cast<LoadSDNode>(LdNode);
19884 if (!LN0 ||!LN0->hasNUsesOfValue(AllowedUses, 0) || LN0->isVolatile())
19887 if (HasShuffleIntoBitcast) {
19888 // If there's a bitcast before the shuffle, check if the load type and
19889 // alignment is valid.
19890 unsigned Align = LN0->getAlignment();
19891 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
19892 unsigned NewAlign = TLI.getDataLayout()->
19893 getABITypeAlignment(VT.getTypeForEVT(*DAG.getContext()));
19895 if (NewAlign > Align || !TLI.isOperationLegalOrCustom(ISD::LOAD, VT))
19899 // All checks match so transform back to vector_shuffle so that DAG combiner
19900 // can finish the job
19903 // Create shuffle node taking into account the case that its a unary shuffle
19904 SDValue Shuffle = (UnaryShuffle) ? DAG.getUNDEF(VT) : InVec.getOperand(1);
19905 Shuffle = DAG.getVectorShuffle(InVec.getValueType(), dl,
19906 InVec.getOperand(0), Shuffle,
19908 Shuffle = DAG.getNode(ISD::BITCAST, dl, VT, Shuffle);
19909 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, N->getValueType(0), Shuffle,
19913 /// PerformEXTRACT_VECTOR_ELTCombine - Detect vector gather/scatter index
19914 /// generation and convert it from being a bunch of shuffles and extracts
19915 /// to a simple store and scalar loads to extract the elements.
19916 static SDValue PerformEXTRACT_VECTOR_ELTCombine(SDNode *N, SelectionDAG &DAG,
19917 TargetLowering::DAGCombinerInfo &DCI) {
19918 SDValue NewOp = XFormVExtractWithShuffleIntoLoad(N, DAG, DCI);
19919 if (NewOp.getNode())
19922 SDValue InputVector = N->getOperand(0);
19924 // Detect whether we are trying to convert from mmx to i32 and the bitcast
19925 // from mmx to v2i32 has a single usage.
19926 if (InputVector.getNode()->getOpcode() == llvm::ISD::BITCAST &&
19927 InputVector.getNode()->getOperand(0).getValueType() == MVT::x86mmx &&
19928 InputVector.hasOneUse() && N->getValueType(0) == MVT::i32)
19929 return DAG.getNode(X86ISD::MMX_MOVD2W, SDLoc(InputVector),
19930 N->getValueType(0),
19931 InputVector.getNode()->getOperand(0));
19933 // Only operate on vectors of 4 elements, where the alternative shuffling
19934 // gets to be more expensive.
19935 if (InputVector.getValueType() != MVT::v4i32)
19938 // Check whether every use of InputVector is an EXTRACT_VECTOR_ELT with a
19939 // single use which is a sign-extend or zero-extend, and all elements are
19941 SmallVector<SDNode *, 4> Uses;
19942 unsigned ExtractedElements = 0;
19943 for (SDNode::use_iterator UI = InputVector.getNode()->use_begin(),
19944 UE = InputVector.getNode()->use_end(); UI != UE; ++UI) {
19945 if (UI.getUse().getResNo() != InputVector.getResNo())
19948 SDNode *Extract = *UI;
19949 if (Extract->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
19952 if (Extract->getValueType(0) != MVT::i32)
19954 if (!Extract->hasOneUse())
19956 if (Extract->use_begin()->getOpcode() != ISD::SIGN_EXTEND &&
19957 Extract->use_begin()->getOpcode() != ISD::ZERO_EXTEND)
19959 if (!isa<ConstantSDNode>(Extract->getOperand(1)))
19962 // Record which element was extracted.
19963 ExtractedElements |=
19964 1 << cast<ConstantSDNode>(Extract->getOperand(1))->getZExtValue();
19966 Uses.push_back(Extract);
19969 // If not all the elements were used, this may not be worthwhile.
19970 if (ExtractedElements != 15)
19973 // Ok, we've now decided to do the transformation.
19974 SDLoc dl(InputVector);
19976 // Store the value to a temporary stack slot.
19977 SDValue StackPtr = DAG.CreateStackTemporary(InputVector.getValueType());
19978 SDValue Ch = DAG.getStore(DAG.getEntryNode(), dl, InputVector, StackPtr,
19979 MachinePointerInfo(), false, false, 0);
19981 // Replace each use (extract) with a load of the appropriate element.
19982 for (SmallVectorImpl<SDNode *>::iterator UI = Uses.begin(),
19983 UE = Uses.end(); UI != UE; ++UI) {
19984 SDNode *Extract = *UI;
19986 // cOMpute the element's address.
19987 SDValue Idx = Extract->getOperand(1);
19989 InputVector.getValueType().getVectorElementType().getSizeInBits()/8;
19990 uint64_t Offset = EltSize * cast<ConstantSDNode>(Idx)->getZExtValue();
19991 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
19992 SDValue OffsetVal = DAG.getConstant(Offset, TLI.getPointerTy());
19994 SDValue ScalarAddr = DAG.getNode(ISD::ADD, dl, TLI.getPointerTy(),
19995 StackPtr, OffsetVal);
19997 // Load the scalar.
19998 SDValue LoadScalar = DAG.getLoad(Extract->getValueType(0), dl, Ch,
19999 ScalarAddr, MachinePointerInfo(),
20000 false, false, false, 0);
20002 // Replace the exact with the load.
20003 DAG.ReplaceAllUsesOfValueWith(SDValue(Extract, 0), LoadScalar);
20006 // The replacement was made in place; don't return anything.
20010 /// \brief Matches a VSELECT onto min/max or return 0 if the node doesn't match.
20011 static std::pair<unsigned, bool>
20012 matchIntegerMINMAX(SDValue Cond, EVT VT, SDValue LHS, SDValue RHS,
20013 SelectionDAG &DAG, const X86Subtarget *Subtarget) {
20014 if (!VT.isVector())
20015 return std::make_pair(0, false);
20017 bool NeedSplit = false;
20018 switch (VT.getSimpleVT().SimpleTy) {
20019 default: return std::make_pair(0, false);
20023 if (!Subtarget->hasAVX2())
20025 if (!Subtarget->hasAVX())
20026 return std::make_pair(0, false);
20031 if (!Subtarget->hasSSE2())
20032 return std::make_pair(0, false);
20035 // SSE2 has only a small subset of the operations.
20036 bool hasUnsigned = Subtarget->hasSSE41() ||
20037 (Subtarget->hasSSE2() && VT == MVT::v16i8);
20038 bool hasSigned = Subtarget->hasSSE41() ||
20039 (Subtarget->hasSSE2() && VT == MVT::v8i16);
20041 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
20044 // Check for x CC y ? x : y.
20045 if (DAG.isEqualTo(LHS, Cond.getOperand(0)) &&
20046 DAG.isEqualTo(RHS, Cond.getOperand(1))) {
20051 Opc = hasUnsigned ? X86ISD::UMIN : 0; break;
20054 Opc = hasUnsigned ? X86ISD::UMAX : 0; break;
20057 Opc = hasSigned ? X86ISD::SMIN : 0; break;
20060 Opc = hasSigned ? X86ISD::SMAX : 0; break;
20062 // Check for x CC y ? y : x -- a min/max with reversed arms.
20063 } else if (DAG.isEqualTo(LHS, Cond.getOperand(1)) &&
20064 DAG.isEqualTo(RHS, Cond.getOperand(0))) {
20069 Opc = hasUnsigned ? X86ISD::UMAX : 0; break;
20072 Opc = hasUnsigned ? X86ISD::UMIN : 0; break;
20075 Opc = hasSigned ? X86ISD::SMAX : 0; break;
20078 Opc = hasSigned ? X86ISD::SMIN : 0; break;
20082 return std::make_pair(Opc, NeedSplit);
20086 TransformVSELECTtoBlendVECTOR_SHUFFLE(SDNode *N, SelectionDAG &DAG,
20087 const X86Subtarget *Subtarget) {
20089 SDValue Cond = N->getOperand(0);
20090 SDValue LHS = N->getOperand(1);
20091 SDValue RHS = N->getOperand(2);
20093 if (Cond.getOpcode() == ISD::SIGN_EXTEND) {
20094 SDValue CondSrc = Cond->getOperand(0);
20095 if (CondSrc->getOpcode() == ISD::SIGN_EXTEND_INREG)
20096 Cond = CondSrc->getOperand(0);
20099 MVT VT = N->getSimpleValueType(0);
20100 MVT EltVT = VT.getVectorElementType();
20101 unsigned NumElems = VT.getVectorNumElements();
20102 // There is no blend with immediate in AVX-512.
20103 if (VT.is512BitVector())
20106 if (!Subtarget->hasSSE41() || EltVT == MVT::i8)
20108 if (!Subtarget->hasInt256() && VT == MVT::v16i16)
20111 if (!ISD::isBuildVectorOfConstantSDNodes(Cond.getNode()))
20114 unsigned MaskValue = 0;
20115 if (!BUILD_VECTORtoBlendMask(cast<BuildVectorSDNode>(Cond), MaskValue))
20118 SmallVector<int, 8> ShuffleMask(NumElems, -1);
20119 for (unsigned i = 0; i < NumElems; ++i) {
20120 // Be sure we emit undef where we can.
20121 if (Cond.getOperand(i)->getOpcode() == ISD::UNDEF)
20122 ShuffleMask[i] = -1;
20124 ShuffleMask[i] = i + NumElems * ((MaskValue >> i) & 1);
20127 return DAG.getVectorShuffle(VT, dl, LHS, RHS, &ShuffleMask[0]);
20130 /// PerformSELECTCombine - Do target-specific dag combines on SELECT and VSELECT
20132 static SDValue PerformSELECTCombine(SDNode *N, SelectionDAG &DAG,
20133 TargetLowering::DAGCombinerInfo &DCI,
20134 const X86Subtarget *Subtarget) {
20136 SDValue Cond = N->getOperand(0);
20137 // Get the LHS/RHS of the select.
20138 SDValue LHS = N->getOperand(1);
20139 SDValue RHS = N->getOperand(2);
20140 EVT VT = LHS.getValueType();
20141 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
20143 // If we have SSE[12] support, try to form min/max nodes. SSE min/max
20144 // instructions match the semantics of the common C idiom x<y?x:y but not
20145 // x<=y?x:y, because of how they handle negative zero (which can be
20146 // ignored in unsafe-math mode).
20147 if (Cond.getOpcode() == ISD::SETCC && VT.isFloatingPoint() &&
20148 VT != MVT::f80 && TLI.isTypeLegal(VT) &&
20149 (Subtarget->hasSSE2() ||
20150 (Subtarget->hasSSE1() && VT.getScalarType() == MVT::f32))) {
20151 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
20153 unsigned Opcode = 0;
20154 // Check for x CC y ? x : y.
20155 if (DAG.isEqualTo(LHS, Cond.getOperand(0)) &&
20156 DAG.isEqualTo(RHS, Cond.getOperand(1))) {
20160 // Converting this to a min would handle NaNs incorrectly, and swapping
20161 // the operands would cause it to handle comparisons between positive
20162 // and negative zero incorrectly.
20163 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) {
20164 if (!DAG.getTarget().Options.UnsafeFPMath &&
20165 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
20167 std::swap(LHS, RHS);
20169 Opcode = X86ISD::FMIN;
20172 // Converting this to a min would handle comparisons between positive
20173 // and negative zero incorrectly.
20174 if (!DAG.getTarget().Options.UnsafeFPMath &&
20175 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS))
20177 Opcode = X86ISD::FMIN;
20180 // Converting this to a min would handle both negative zeros and NaNs
20181 // incorrectly, but we can swap the operands to fix both.
20182 std::swap(LHS, RHS);
20186 Opcode = X86ISD::FMIN;
20190 // Converting this to a max would handle comparisons between positive
20191 // and negative zero incorrectly.
20192 if (!DAG.getTarget().Options.UnsafeFPMath &&
20193 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS))
20195 Opcode = X86ISD::FMAX;
20198 // Converting this to a max would handle NaNs incorrectly, and swapping
20199 // the operands would cause it to handle comparisons between positive
20200 // and negative zero incorrectly.
20201 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) {
20202 if (!DAG.getTarget().Options.UnsafeFPMath &&
20203 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
20205 std::swap(LHS, RHS);
20207 Opcode = X86ISD::FMAX;
20210 // Converting this to a max would handle both negative zeros and NaNs
20211 // incorrectly, but we can swap the operands to fix both.
20212 std::swap(LHS, RHS);
20216 Opcode = X86ISD::FMAX;
20219 // Check for x CC y ? y : x -- a min/max with reversed arms.
20220 } else if (DAG.isEqualTo(LHS, Cond.getOperand(1)) &&
20221 DAG.isEqualTo(RHS, Cond.getOperand(0))) {
20225 // Converting this to a min would handle comparisons between positive
20226 // and negative zero incorrectly, and swapping the operands would
20227 // cause it to handle NaNs incorrectly.
20228 if (!DAG.getTarget().Options.UnsafeFPMath &&
20229 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS))) {
20230 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
20232 std::swap(LHS, RHS);
20234 Opcode = X86ISD::FMIN;
20237 // Converting this to a min would handle NaNs incorrectly.
20238 if (!DAG.getTarget().Options.UnsafeFPMath &&
20239 (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)))
20241 Opcode = X86ISD::FMIN;
20244 // Converting this to a min would handle both negative zeros and NaNs
20245 // incorrectly, but we can swap the operands to fix both.
20246 std::swap(LHS, RHS);
20250 Opcode = X86ISD::FMIN;
20254 // Converting this to a max would handle NaNs incorrectly.
20255 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
20257 Opcode = X86ISD::FMAX;
20260 // Converting this to a max would handle comparisons between positive
20261 // and negative zero incorrectly, and swapping the operands would
20262 // cause it to handle NaNs incorrectly.
20263 if (!DAG.getTarget().Options.UnsafeFPMath &&
20264 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS)) {
20265 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
20267 std::swap(LHS, RHS);
20269 Opcode = X86ISD::FMAX;
20272 // Converting this to a max would handle both negative zeros and NaNs
20273 // incorrectly, but we can swap the operands to fix both.
20274 std::swap(LHS, RHS);
20278 Opcode = X86ISD::FMAX;
20284 return DAG.getNode(Opcode, DL, N->getValueType(0), LHS, RHS);
20287 EVT CondVT = Cond.getValueType();
20288 if (Subtarget->hasAVX512() && VT.isVector() && CondVT.isVector() &&
20289 CondVT.getVectorElementType() == MVT::i1) {
20290 // v16i8 (select v16i1, v16i8, v16i8) does not have a proper
20291 // lowering on AVX-512. In this case we convert it to
20292 // v16i8 (select v16i8, v16i8, v16i8) and use AVX instruction.
20293 // The same situation for all 128 and 256-bit vectors of i8 and i16
20294 EVT OpVT = LHS.getValueType();
20295 if ((OpVT.is128BitVector() || OpVT.is256BitVector()) &&
20296 (OpVT.getVectorElementType() == MVT::i8 ||
20297 OpVT.getVectorElementType() == MVT::i16)) {
20298 Cond = DAG.getNode(ISD::SIGN_EXTEND, DL, OpVT, Cond);
20299 DCI.AddToWorklist(Cond.getNode());
20300 return DAG.getNode(N->getOpcode(), DL, OpVT, Cond, LHS, RHS);
20303 // If this is a select between two integer constants, try to do some
20305 if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(LHS)) {
20306 if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(RHS))
20307 // Don't do this for crazy integer types.
20308 if (DAG.getTargetLoweringInfo().isTypeLegal(LHS.getValueType())) {
20309 // If this is efficiently invertible, canonicalize the LHSC/RHSC values
20310 // so that TrueC (the true value) is larger than FalseC.
20311 bool NeedsCondInvert = false;
20313 if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue()) &&
20314 // Efficiently invertible.
20315 (Cond.getOpcode() == ISD::SETCC || // setcc -> invertible.
20316 (Cond.getOpcode() == ISD::XOR && // xor(X, C) -> invertible.
20317 isa<ConstantSDNode>(Cond.getOperand(1))))) {
20318 NeedsCondInvert = true;
20319 std::swap(TrueC, FalseC);
20322 // Optimize C ? 8 : 0 -> zext(C) << 3. Likewise for any pow2/0.
20323 if (FalseC->getAPIntValue() == 0 &&
20324 TrueC->getAPIntValue().isPowerOf2()) {
20325 if (NeedsCondInvert) // Invert the condition if needed.
20326 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
20327 DAG.getConstant(1, Cond.getValueType()));
20329 // Zero extend the condition if needed.
20330 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, LHS.getValueType(), Cond);
20332 unsigned ShAmt = TrueC->getAPIntValue().logBase2();
20333 return DAG.getNode(ISD::SHL, DL, LHS.getValueType(), Cond,
20334 DAG.getConstant(ShAmt, MVT::i8));
20337 // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst.
20338 if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) {
20339 if (NeedsCondInvert) // Invert the condition if needed.
20340 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
20341 DAG.getConstant(1, Cond.getValueType()));
20343 // Zero extend the condition if needed.
20344 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL,
20345 FalseC->getValueType(0), Cond);
20346 return DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
20347 SDValue(FalseC, 0));
20350 // Optimize cases that will turn into an LEA instruction. This requires
20351 // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9).
20352 if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) {
20353 uint64_t Diff = TrueC->getZExtValue()-FalseC->getZExtValue();
20354 if (N->getValueType(0) == MVT::i32) Diff = (unsigned)Diff;
20356 bool isFastMultiplier = false;
20358 switch ((unsigned char)Diff) {
20360 case 1: // result = add base, cond
20361 case 2: // result = lea base( , cond*2)
20362 case 3: // result = lea base(cond, cond*2)
20363 case 4: // result = lea base( , cond*4)
20364 case 5: // result = lea base(cond, cond*4)
20365 case 8: // result = lea base( , cond*8)
20366 case 9: // result = lea base(cond, cond*8)
20367 isFastMultiplier = true;
20372 if (isFastMultiplier) {
20373 APInt Diff = TrueC->getAPIntValue()-FalseC->getAPIntValue();
20374 if (NeedsCondInvert) // Invert the condition if needed.
20375 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
20376 DAG.getConstant(1, Cond.getValueType()));
20378 // Zero extend the condition if needed.
20379 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0),
20381 // Scale the condition by the difference.
20383 Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond,
20384 DAG.getConstant(Diff, Cond.getValueType()));
20386 // Add the base if non-zero.
20387 if (FalseC->getAPIntValue() != 0)
20388 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
20389 SDValue(FalseC, 0));
20396 // Canonicalize max and min:
20397 // (x > y) ? x : y -> (x >= y) ? x : y
20398 // (x < y) ? x : y -> (x <= y) ? x : y
20399 // This allows use of COND_S / COND_NS (see TranslateX86CC) which eliminates
20400 // the need for an extra compare
20401 // against zero. e.g.
20402 // (x - y) > 0 : (x - y) ? 0 -> (x - y) >= 0 : (x - y) ? 0
20404 // testl %edi, %edi
20406 // cmovgl %edi, %eax
20410 // cmovsl %eax, %edi
20411 if (N->getOpcode() == ISD::SELECT && Cond.getOpcode() == ISD::SETCC &&
20412 DAG.isEqualTo(LHS, Cond.getOperand(0)) &&
20413 DAG.isEqualTo(RHS, Cond.getOperand(1))) {
20414 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
20419 ISD::CondCode NewCC = (CC == ISD::SETLT) ? ISD::SETLE : ISD::SETGE;
20420 Cond = DAG.getSetCC(SDLoc(Cond), Cond.getValueType(),
20421 Cond.getOperand(0), Cond.getOperand(1), NewCC);
20422 return DAG.getNode(ISD::SELECT, DL, VT, Cond, LHS, RHS);
20427 // Early exit check
20428 if (!TLI.isTypeLegal(VT))
20431 // Match VSELECTs into subs with unsigned saturation.
20432 if (N->getOpcode() == ISD::VSELECT && Cond.getOpcode() == ISD::SETCC &&
20433 // psubus is available in SSE2 and AVX2 for i8 and i16 vectors.
20434 ((Subtarget->hasSSE2() && (VT == MVT::v16i8 || VT == MVT::v8i16)) ||
20435 (Subtarget->hasAVX2() && (VT == MVT::v32i8 || VT == MVT::v16i16)))) {
20436 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
20438 // Check if one of the arms of the VSELECT is a zero vector. If it's on the
20439 // left side invert the predicate to simplify logic below.
20441 if (ISD::isBuildVectorAllZeros(LHS.getNode())) {
20443 CC = ISD::getSetCCInverse(CC, true);
20444 } else if (ISD::isBuildVectorAllZeros(RHS.getNode())) {
20448 if (Other.getNode() && Other->getNumOperands() == 2 &&
20449 DAG.isEqualTo(Other->getOperand(0), Cond.getOperand(0))) {
20450 SDValue OpLHS = Other->getOperand(0), OpRHS = Other->getOperand(1);
20451 SDValue CondRHS = Cond->getOperand(1);
20453 // Look for a general sub with unsigned saturation first.
20454 // x >= y ? x-y : 0 --> subus x, y
20455 // x > y ? x-y : 0 --> subus x, y
20456 if ((CC == ISD::SETUGE || CC == ISD::SETUGT) &&
20457 Other->getOpcode() == ISD::SUB && DAG.isEqualTo(OpRHS, CondRHS))
20458 return DAG.getNode(X86ISD::SUBUS, DL, VT, OpLHS, OpRHS);
20460 if (auto *OpRHSBV = dyn_cast<BuildVectorSDNode>(OpRHS))
20461 if (auto *OpRHSConst = OpRHSBV->getConstantSplatNode()) {
20462 if (auto *CondRHSBV = dyn_cast<BuildVectorSDNode>(CondRHS))
20463 if (auto *CondRHSConst = CondRHSBV->getConstantSplatNode())
20464 // If the RHS is a constant we have to reverse the const
20465 // canonicalization.
20466 // x > C-1 ? x+-C : 0 --> subus x, C
20467 if (CC == ISD::SETUGT && Other->getOpcode() == ISD::ADD &&
20468 CondRHSConst->getAPIntValue() ==
20469 (-OpRHSConst->getAPIntValue() - 1))
20470 return DAG.getNode(
20471 X86ISD::SUBUS, DL, VT, OpLHS,
20472 DAG.getConstant(-OpRHSConst->getAPIntValue(), VT));
20474 // Another special case: If C was a sign bit, the sub has been
20475 // canonicalized into a xor.
20476 // FIXME: Would it be better to use computeKnownBits to determine
20477 // whether it's safe to decanonicalize the xor?
20478 // x s< 0 ? x^C : 0 --> subus x, C
20479 if (CC == ISD::SETLT && Other->getOpcode() == ISD::XOR &&
20480 ISD::isBuildVectorAllZeros(CondRHS.getNode()) &&
20481 OpRHSConst->getAPIntValue().isSignBit())
20482 // Note that we have to rebuild the RHS constant here to ensure we
20483 // don't rely on particular values of undef lanes.
20484 return DAG.getNode(
20485 X86ISD::SUBUS, DL, VT, OpLHS,
20486 DAG.getConstant(OpRHSConst->getAPIntValue(), VT));
20491 // Try to match a min/max vector operation.
20492 if (N->getOpcode() == ISD::VSELECT && Cond.getOpcode() == ISD::SETCC) {
20493 std::pair<unsigned, bool> ret = matchIntegerMINMAX(Cond, VT, LHS, RHS, DAG, Subtarget);
20494 unsigned Opc = ret.first;
20495 bool NeedSplit = ret.second;
20497 if (Opc && NeedSplit) {
20498 unsigned NumElems = VT.getVectorNumElements();
20499 // Extract the LHS vectors
20500 SDValue LHS1 = Extract128BitVector(LHS, 0, DAG, DL);
20501 SDValue LHS2 = Extract128BitVector(LHS, NumElems/2, DAG, DL);
20503 // Extract the RHS vectors
20504 SDValue RHS1 = Extract128BitVector(RHS, 0, DAG, DL);
20505 SDValue RHS2 = Extract128BitVector(RHS, NumElems/2, DAG, DL);
20507 // Create min/max for each subvector
20508 LHS = DAG.getNode(Opc, DL, LHS1.getValueType(), LHS1, RHS1);
20509 RHS = DAG.getNode(Opc, DL, LHS2.getValueType(), LHS2, RHS2);
20511 // Merge the result
20512 return DAG.getNode(ISD::CONCAT_VECTORS, DL, VT, LHS, RHS);
20514 return DAG.getNode(Opc, DL, VT, LHS, RHS);
20517 // Simplify vector selection if the selector will be produced by CMPP*/PCMP*.
20518 if (N->getOpcode() == ISD::VSELECT && Cond.getOpcode() == ISD::SETCC &&
20519 // Check if SETCC has already been promoted
20520 TLI.getSetCCResultType(*DAG.getContext(), VT) == CondVT &&
20521 // Check that condition value type matches vselect operand type
20524 assert(Cond.getValueType().isVector() &&
20525 "vector select expects a vector selector!");
20527 bool TValIsAllOnes = ISD::isBuildVectorAllOnes(LHS.getNode());
20528 bool FValIsAllZeros = ISD::isBuildVectorAllZeros(RHS.getNode());
20530 if (!TValIsAllOnes && !FValIsAllZeros) {
20531 // Try invert the condition if true value is not all 1s and false value
20533 bool TValIsAllZeros = ISD::isBuildVectorAllZeros(LHS.getNode());
20534 bool FValIsAllOnes = ISD::isBuildVectorAllOnes(RHS.getNode());
20536 if (TValIsAllZeros || FValIsAllOnes) {
20537 SDValue CC = Cond.getOperand(2);
20538 ISD::CondCode NewCC =
20539 ISD::getSetCCInverse(cast<CondCodeSDNode>(CC)->get(),
20540 Cond.getOperand(0).getValueType().isInteger());
20541 Cond = DAG.getSetCC(DL, CondVT, Cond.getOperand(0), Cond.getOperand(1), NewCC);
20542 std::swap(LHS, RHS);
20543 TValIsAllOnes = FValIsAllOnes;
20544 FValIsAllZeros = TValIsAllZeros;
20548 if (TValIsAllOnes || FValIsAllZeros) {
20551 if (TValIsAllOnes && FValIsAllZeros)
20553 else if (TValIsAllOnes)
20554 Ret = DAG.getNode(ISD::OR, DL, CondVT, Cond,
20555 DAG.getNode(ISD::BITCAST, DL, CondVT, RHS));
20556 else if (FValIsAllZeros)
20557 Ret = DAG.getNode(ISD::AND, DL, CondVT, Cond,
20558 DAG.getNode(ISD::BITCAST, DL, CondVT, LHS));
20560 return DAG.getNode(ISD::BITCAST, DL, VT, Ret);
20564 // Try to fold this VSELECT into a MOVSS/MOVSD
20565 if (N->getOpcode() == ISD::VSELECT &&
20566 Cond.getOpcode() == ISD::BUILD_VECTOR && !DCI.isBeforeLegalize()) {
20567 if (VT == MVT::v4i32 || VT == MVT::v4f32 ||
20568 (Subtarget->hasSSE2() && (VT == MVT::v2i64 || VT == MVT::v2f64))) {
20569 bool CanFold = false;
20570 unsigned NumElems = Cond.getNumOperands();
20574 if (isZero(Cond.getOperand(0))) {
20577 // fold (vselect <0,-1,-1,-1>, A, B) -> (movss A, B)
20578 // fold (vselect <0,-1> -> (movsd A, B)
20579 for (unsigned i = 1, e = NumElems; i != e && CanFold; ++i)
20580 CanFold = isAllOnes(Cond.getOperand(i));
20581 } else if (isAllOnes(Cond.getOperand(0))) {
20585 // fold (vselect <-1,0,0,0>, A, B) -> (movss B, A)
20586 // fold (vselect <-1,0> -> (movsd B, A)
20587 for (unsigned i = 1, e = NumElems; i != e && CanFold; ++i)
20588 CanFold = isZero(Cond.getOperand(i));
20592 if (VT == MVT::v4i32 || VT == MVT::v4f32)
20593 return getTargetShuffleNode(X86ISD::MOVSS, DL, VT, A, B, DAG);
20594 return getTargetShuffleNode(X86ISD::MOVSD, DL, VT, A, B, DAG);
20597 if (Subtarget->hasSSE2() && (VT == MVT::v4i32 || VT == MVT::v4f32)) {
20598 // fold (v4i32: vselect <0,0,-1,-1>, A, B) ->
20599 // (v4i32 (bitcast (movsd (v2i64 (bitcast A)),
20600 // (v2i64 (bitcast B)))))
20602 // fold (v4f32: vselect <0,0,-1,-1>, A, B) ->
20603 // (v4f32 (bitcast (movsd (v2f64 (bitcast A)),
20604 // (v2f64 (bitcast B)))))
20606 // fold (v4i32: vselect <-1,-1,0,0>, A, B) ->
20607 // (v4i32 (bitcast (movsd (v2i64 (bitcast B)),
20608 // (v2i64 (bitcast A)))))
20610 // fold (v4f32: vselect <-1,-1,0,0>, A, B) ->
20611 // (v4f32 (bitcast (movsd (v2f64 (bitcast B)),
20612 // (v2f64 (bitcast A)))))
20614 CanFold = (isZero(Cond.getOperand(0)) &&
20615 isZero(Cond.getOperand(1)) &&
20616 isAllOnes(Cond.getOperand(2)) &&
20617 isAllOnes(Cond.getOperand(3)));
20619 if (!CanFold && isAllOnes(Cond.getOperand(0)) &&
20620 isAllOnes(Cond.getOperand(1)) &&
20621 isZero(Cond.getOperand(2)) &&
20622 isZero(Cond.getOperand(3))) {
20624 std::swap(LHS, RHS);
20628 EVT NVT = (VT == MVT::v4i32) ? MVT::v2i64 : MVT::v2f64;
20629 SDValue NewA = DAG.getNode(ISD::BITCAST, DL, NVT, LHS);
20630 SDValue NewB = DAG.getNode(ISD::BITCAST, DL, NVT, RHS);
20631 SDValue Select = getTargetShuffleNode(X86ISD::MOVSD, DL, NVT, NewA,
20633 return DAG.getNode(ISD::BITCAST, DL, VT, Select);
20639 // If we know that this node is legal then we know that it is going to be
20640 // matched by one of the SSE/AVX BLEND instructions. These instructions only
20641 // depend on the highest bit in each word. Try to use SimplifyDemandedBits
20642 // to simplify previous instructions.
20643 if (N->getOpcode() == ISD::VSELECT && DCI.isBeforeLegalizeOps() &&
20644 !DCI.isBeforeLegalize() &&
20645 // We explicitly check against v8i16 and v16i16 because, although
20646 // they're marked as Custom, they might only be legal when Cond is a
20647 // build_vector of constants. This will be taken care in a later
20649 (TLI.isOperationLegalOrCustom(ISD::VSELECT, VT) && VT != MVT::v16i16 &&
20650 VT != MVT::v8i16)) {
20651 unsigned BitWidth = Cond.getValueType().getScalarType().getSizeInBits();
20653 // Don't optimize vector selects that map to mask-registers.
20657 // Check all uses of that condition operand to check whether it will be
20658 // consumed by non-BLEND instructions, which may depend on all bits are set
20660 for (SDNode::use_iterator I = Cond->use_begin(),
20661 E = Cond->use_end(); I != E; ++I)
20662 if (I->getOpcode() != ISD::VSELECT)
20663 // TODO: Add other opcodes eventually lowered into BLEND.
20666 assert(BitWidth >= 8 && BitWidth <= 64 && "Invalid mask size");
20667 APInt DemandedMask = APInt::getHighBitsSet(BitWidth, 1);
20669 APInt KnownZero, KnownOne;
20670 TargetLowering::TargetLoweringOpt TLO(DAG, DCI.isBeforeLegalize(),
20671 DCI.isBeforeLegalizeOps());
20672 if (TLO.ShrinkDemandedConstant(Cond, DemandedMask) ||
20673 TLI.SimplifyDemandedBits(Cond, DemandedMask, KnownZero, KnownOne, TLO))
20674 DCI.CommitTargetLoweringOpt(TLO);
20677 // We should generate an X86ISD::BLENDI from a vselect if its argument
20678 // is a sign_extend_inreg of an any_extend of a BUILD_VECTOR of
20679 // constants. This specific pattern gets generated when we split a
20680 // selector for a 512 bit vector in a machine without AVX512 (but with
20681 // 256-bit vectors), during legalization:
20683 // (vselect (sign_extend (any_extend (BUILD_VECTOR)) i1) LHS RHS)
20685 // Iff we find this pattern and the build_vectors are built from
20686 // constants, we translate the vselect into a shuffle_vector that we
20687 // know will be matched by LowerVECTOR_SHUFFLEtoBlend.
20688 if (N->getOpcode() == ISD::VSELECT && !DCI.isBeforeLegalize()) {
20689 SDValue Shuffle = TransformVSELECTtoBlendVECTOR_SHUFFLE(N, DAG, Subtarget);
20690 if (Shuffle.getNode())
20697 // Check whether a boolean test is testing a boolean value generated by
20698 // X86ISD::SETCC. If so, return the operand of that SETCC and proper condition
20701 // Simplify the following patterns:
20702 // (Op (CMP (SETCC Cond EFLAGS) 1) EQ) or
20703 // (Op (CMP (SETCC Cond EFLAGS) 0) NEQ)
20704 // to (Op EFLAGS Cond)
20706 // (Op (CMP (SETCC Cond EFLAGS) 0) EQ) or
20707 // (Op (CMP (SETCC Cond EFLAGS) 1) NEQ)
20708 // to (Op EFLAGS !Cond)
20710 // where Op could be BRCOND or CMOV.
20712 static SDValue checkBoolTestSetCCCombine(SDValue Cmp, X86::CondCode &CC) {
20713 // Quit if not CMP and SUB with its value result used.
20714 if (Cmp.getOpcode() != X86ISD::CMP &&
20715 (Cmp.getOpcode() != X86ISD::SUB || Cmp.getNode()->hasAnyUseOfValue(0)))
20718 // Quit if not used as a boolean value.
20719 if (CC != X86::COND_E && CC != X86::COND_NE)
20722 // Check CMP operands. One of them should be 0 or 1 and the other should be
20723 // an SetCC or extended from it.
20724 SDValue Op1 = Cmp.getOperand(0);
20725 SDValue Op2 = Cmp.getOperand(1);
20728 const ConstantSDNode* C = nullptr;
20729 bool needOppositeCond = (CC == X86::COND_E);
20730 bool checkAgainstTrue = false; // Is it a comparison against 1?
20732 if ((C = dyn_cast<ConstantSDNode>(Op1)))
20734 else if ((C = dyn_cast<ConstantSDNode>(Op2)))
20736 else // Quit if all operands are not constants.
20739 if (C->getZExtValue() == 1) {
20740 needOppositeCond = !needOppositeCond;
20741 checkAgainstTrue = true;
20742 } else if (C->getZExtValue() != 0)
20743 // Quit if the constant is neither 0 or 1.
20746 bool truncatedToBoolWithAnd = false;
20747 // Skip (zext $x), (trunc $x), or (and $x, 1) node.
20748 while (SetCC.getOpcode() == ISD::ZERO_EXTEND ||
20749 SetCC.getOpcode() == ISD::TRUNCATE ||
20750 SetCC.getOpcode() == ISD::AND) {
20751 if (SetCC.getOpcode() == ISD::AND) {
20753 ConstantSDNode *CS;
20754 if ((CS = dyn_cast<ConstantSDNode>(SetCC.getOperand(0))) &&
20755 CS->getZExtValue() == 1)
20757 if ((CS = dyn_cast<ConstantSDNode>(SetCC.getOperand(1))) &&
20758 CS->getZExtValue() == 1)
20762 SetCC = SetCC.getOperand(OpIdx);
20763 truncatedToBoolWithAnd = true;
20765 SetCC = SetCC.getOperand(0);
20768 switch (SetCC.getOpcode()) {
20769 case X86ISD::SETCC_CARRY:
20770 // Since SETCC_CARRY gives output based on R = CF ? ~0 : 0, it's unsafe to
20771 // simplify it if the result of SETCC_CARRY is not canonicalized to 0 or 1,
20772 // i.e. it's a comparison against true but the result of SETCC_CARRY is not
20773 // truncated to i1 using 'and'.
20774 if (checkAgainstTrue && !truncatedToBoolWithAnd)
20776 assert(X86::CondCode(SetCC.getConstantOperandVal(0)) == X86::COND_B &&
20777 "Invalid use of SETCC_CARRY!");
20779 case X86ISD::SETCC:
20780 // Set the condition code or opposite one if necessary.
20781 CC = X86::CondCode(SetCC.getConstantOperandVal(0));
20782 if (needOppositeCond)
20783 CC = X86::GetOppositeBranchCondition(CC);
20784 return SetCC.getOperand(1);
20785 case X86ISD::CMOV: {
20786 // Check whether false/true value has canonical one, i.e. 0 or 1.
20787 ConstantSDNode *FVal = dyn_cast<ConstantSDNode>(SetCC.getOperand(0));
20788 ConstantSDNode *TVal = dyn_cast<ConstantSDNode>(SetCC.getOperand(1));
20789 // Quit if true value is not a constant.
20792 // Quit if false value is not a constant.
20794 SDValue Op = SetCC.getOperand(0);
20795 // Skip 'zext' or 'trunc' node.
20796 if (Op.getOpcode() == ISD::ZERO_EXTEND ||
20797 Op.getOpcode() == ISD::TRUNCATE)
20798 Op = Op.getOperand(0);
20799 // A special case for rdrand/rdseed, where 0 is set if false cond is
20801 if ((Op.getOpcode() != X86ISD::RDRAND &&
20802 Op.getOpcode() != X86ISD::RDSEED) || Op.getResNo() != 0)
20805 // Quit if false value is not the constant 0 or 1.
20806 bool FValIsFalse = true;
20807 if (FVal && FVal->getZExtValue() != 0) {
20808 if (FVal->getZExtValue() != 1)
20810 // If FVal is 1, opposite cond is needed.
20811 needOppositeCond = !needOppositeCond;
20812 FValIsFalse = false;
20814 // Quit if TVal is not the constant opposite of FVal.
20815 if (FValIsFalse && TVal->getZExtValue() != 1)
20817 if (!FValIsFalse && TVal->getZExtValue() != 0)
20819 CC = X86::CondCode(SetCC.getConstantOperandVal(2));
20820 if (needOppositeCond)
20821 CC = X86::GetOppositeBranchCondition(CC);
20822 return SetCC.getOperand(3);
20829 /// Optimize X86ISD::CMOV [LHS, RHS, CONDCODE (e.g. X86::COND_NE), CONDVAL]
20830 static SDValue PerformCMOVCombine(SDNode *N, SelectionDAG &DAG,
20831 TargetLowering::DAGCombinerInfo &DCI,
20832 const X86Subtarget *Subtarget) {
20835 // If the flag operand isn't dead, don't touch this CMOV.
20836 if (N->getNumValues() == 2 && !SDValue(N, 1).use_empty())
20839 SDValue FalseOp = N->getOperand(0);
20840 SDValue TrueOp = N->getOperand(1);
20841 X86::CondCode CC = (X86::CondCode)N->getConstantOperandVal(2);
20842 SDValue Cond = N->getOperand(3);
20844 if (CC == X86::COND_E || CC == X86::COND_NE) {
20845 switch (Cond.getOpcode()) {
20849 // If operand of BSR / BSF are proven never zero, then ZF cannot be set.
20850 if (DAG.isKnownNeverZero(Cond.getOperand(0)))
20851 return (CC == X86::COND_E) ? FalseOp : TrueOp;
20857 Flags = checkBoolTestSetCCCombine(Cond, CC);
20858 if (Flags.getNode() &&
20859 // Extra check as FCMOV only supports a subset of X86 cond.
20860 (FalseOp.getValueType() != MVT::f80 || hasFPCMov(CC))) {
20861 SDValue Ops[] = { FalseOp, TrueOp,
20862 DAG.getConstant(CC, MVT::i8), Flags };
20863 return DAG.getNode(X86ISD::CMOV, DL, N->getVTList(), Ops);
20866 // If this is a select between two integer constants, try to do some
20867 // optimizations. Note that the operands are ordered the opposite of SELECT
20869 if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(TrueOp)) {
20870 if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(FalseOp)) {
20871 // Canonicalize the TrueC/FalseC values so that TrueC (the true value) is
20872 // larger than FalseC (the false value).
20873 if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue())) {
20874 CC = X86::GetOppositeBranchCondition(CC);
20875 std::swap(TrueC, FalseC);
20876 std::swap(TrueOp, FalseOp);
20879 // Optimize C ? 8 : 0 -> zext(setcc(C)) << 3. Likewise for any pow2/0.
20880 // This is efficient for any integer data type (including i8/i16) and
20882 if (FalseC->getAPIntValue() == 0 && TrueC->getAPIntValue().isPowerOf2()) {
20883 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
20884 DAG.getConstant(CC, MVT::i8), Cond);
20886 // Zero extend the condition if needed.
20887 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, TrueC->getValueType(0), Cond);
20889 unsigned ShAmt = TrueC->getAPIntValue().logBase2();
20890 Cond = DAG.getNode(ISD::SHL, DL, Cond.getValueType(), Cond,
20891 DAG.getConstant(ShAmt, MVT::i8));
20892 if (N->getNumValues() == 2) // Dead flag value?
20893 return DCI.CombineTo(N, Cond, SDValue());
20897 // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst. This is efficient
20898 // for any integer data type, including i8/i16.
20899 if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) {
20900 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
20901 DAG.getConstant(CC, MVT::i8), Cond);
20903 // Zero extend the condition if needed.
20904 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL,
20905 FalseC->getValueType(0), Cond);
20906 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
20907 SDValue(FalseC, 0));
20909 if (N->getNumValues() == 2) // Dead flag value?
20910 return DCI.CombineTo(N, Cond, SDValue());
20914 // Optimize cases that will turn into an LEA instruction. This requires
20915 // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9).
20916 if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) {
20917 uint64_t Diff = TrueC->getZExtValue()-FalseC->getZExtValue();
20918 if (N->getValueType(0) == MVT::i32) Diff = (unsigned)Diff;
20920 bool isFastMultiplier = false;
20922 switch ((unsigned char)Diff) {
20924 case 1: // result = add base, cond
20925 case 2: // result = lea base( , cond*2)
20926 case 3: // result = lea base(cond, cond*2)
20927 case 4: // result = lea base( , cond*4)
20928 case 5: // result = lea base(cond, cond*4)
20929 case 8: // result = lea base( , cond*8)
20930 case 9: // result = lea base(cond, cond*8)
20931 isFastMultiplier = true;
20936 if (isFastMultiplier) {
20937 APInt Diff = TrueC->getAPIntValue()-FalseC->getAPIntValue();
20938 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
20939 DAG.getConstant(CC, MVT::i8), Cond);
20940 // Zero extend the condition if needed.
20941 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0),
20943 // Scale the condition by the difference.
20945 Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond,
20946 DAG.getConstant(Diff, Cond.getValueType()));
20948 // Add the base if non-zero.
20949 if (FalseC->getAPIntValue() != 0)
20950 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
20951 SDValue(FalseC, 0));
20952 if (N->getNumValues() == 2) // Dead flag value?
20953 return DCI.CombineTo(N, Cond, SDValue());
20960 // Handle these cases:
20961 // (select (x != c), e, c) -> select (x != c), e, x),
20962 // (select (x == c), c, e) -> select (x == c), x, e)
20963 // where the c is an integer constant, and the "select" is the combination
20964 // of CMOV and CMP.
20966 // The rationale for this change is that the conditional-move from a constant
20967 // needs two instructions, however, conditional-move from a register needs
20968 // only one instruction.
20970 // CAVEAT: By replacing a constant with a symbolic value, it may obscure
20971 // some instruction-combining opportunities. This opt needs to be
20972 // postponed as late as possible.
20974 if (!DCI.isBeforeLegalize() && !DCI.isBeforeLegalizeOps()) {
20975 // the DCI.xxxx conditions are provided to postpone the optimization as
20976 // late as possible.
20978 ConstantSDNode *CmpAgainst = nullptr;
20979 if ((Cond.getOpcode() == X86ISD::CMP || Cond.getOpcode() == X86ISD::SUB) &&
20980 (CmpAgainst = dyn_cast<ConstantSDNode>(Cond.getOperand(1))) &&
20981 !isa<ConstantSDNode>(Cond.getOperand(0))) {
20983 if (CC == X86::COND_NE &&
20984 CmpAgainst == dyn_cast<ConstantSDNode>(FalseOp)) {
20985 CC = X86::GetOppositeBranchCondition(CC);
20986 std::swap(TrueOp, FalseOp);
20989 if (CC == X86::COND_E &&
20990 CmpAgainst == dyn_cast<ConstantSDNode>(TrueOp)) {
20991 SDValue Ops[] = { FalseOp, Cond.getOperand(0),
20992 DAG.getConstant(CC, MVT::i8), Cond };
20993 return DAG.getNode(X86ISD::CMOV, DL, N->getVTList (), Ops);
21001 static SDValue PerformINTRINSIC_WO_CHAINCombine(SDNode *N, SelectionDAG &DAG,
21002 const X86Subtarget *Subtarget) {
21003 unsigned IntNo = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue();
21005 default: return SDValue();
21006 // SSE/AVX/AVX2 blend intrinsics.
21007 case Intrinsic::x86_avx2_pblendvb:
21008 case Intrinsic::x86_avx2_pblendw:
21009 case Intrinsic::x86_avx2_pblendd_128:
21010 case Intrinsic::x86_avx2_pblendd_256:
21011 // Don't try to simplify this intrinsic if we don't have AVX2.
21012 if (!Subtarget->hasAVX2())
21015 case Intrinsic::x86_avx_blend_pd_256:
21016 case Intrinsic::x86_avx_blend_ps_256:
21017 case Intrinsic::x86_avx_blendv_pd_256:
21018 case Intrinsic::x86_avx_blendv_ps_256:
21019 // Don't try to simplify this intrinsic if we don't have AVX.
21020 if (!Subtarget->hasAVX())
21023 case Intrinsic::x86_sse41_pblendw:
21024 case Intrinsic::x86_sse41_blendpd:
21025 case Intrinsic::x86_sse41_blendps:
21026 case Intrinsic::x86_sse41_blendvps:
21027 case Intrinsic::x86_sse41_blendvpd:
21028 case Intrinsic::x86_sse41_pblendvb: {
21029 SDValue Op0 = N->getOperand(1);
21030 SDValue Op1 = N->getOperand(2);
21031 SDValue Mask = N->getOperand(3);
21033 // Don't try to simplify this intrinsic if we don't have SSE4.1.
21034 if (!Subtarget->hasSSE41())
21037 // fold (blend A, A, Mask) -> A
21040 // fold (blend A, B, allZeros) -> A
21041 if (ISD::isBuildVectorAllZeros(Mask.getNode()))
21043 // fold (blend A, B, allOnes) -> B
21044 if (ISD::isBuildVectorAllOnes(Mask.getNode()))
21047 // Simplify the case where the mask is a constant i32 value.
21048 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Mask)) {
21049 if (C->isNullValue())
21051 if (C->isAllOnesValue())
21058 // Packed SSE2/AVX2 arithmetic shift immediate intrinsics.
21059 case Intrinsic::x86_sse2_psrai_w:
21060 case Intrinsic::x86_sse2_psrai_d:
21061 case Intrinsic::x86_avx2_psrai_w:
21062 case Intrinsic::x86_avx2_psrai_d:
21063 case Intrinsic::x86_sse2_psra_w:
21064 case Intrinsic::x86_sse2_psra_d:
21065 case Intrinsic::x86_avx2_psra_w:
21066 case Intrinsic::x86_avx2_psra_d: {
21067 SDValue Op0 = N->getOperand(1);
21068 SDValue Op1 = N->getOperand(2);
21069 EVT VT = Op0.getValueType();
21070 assert(VT.isVector() && "Expected a vector type!");
21072 if (isa<BuildVectorSDNode>(Op1))
21073 Op1 = Op1.getOperand(0);
21075 if (!isa<ConstantSDNode>(Op1))
21078 EVT SVT = VT.getVectorElementType();
21079 unsigned SVTBits = SVT.getSizeInBits();
21081 ConstantSDNode *CND = cast<ConstantSDNode>(Op1);
21082 const APInt &C = APInt(SVTBits, CND->getAPIntValue().getZExtValue());
21083 uint64_t ShAmt = C.getZExtValue();
21085 // Don't try to convert this shift into a ISD::SRA if the shift
21086 // count is bigger than or equal to the element size.
21087 if (ShAmt >= SVTBits)
21090 // Trivial case: if the shift count is zero, then fold this
21091 // into the first operand.
21095 // Replace this packed shift intrinsic with a target independent
21097 SDValue Splat = DAG.getConstant(C, VT);
21098 return DAG.getNode(ISD::SRA, SDLoc(N), VT, Op0, Splat);
21103 /// PerformMulCombine - Optimize a single multiply with constant into two
21104 /// in order to implement it with two cheaper instructions, e.g.
21105 /// LEA + SHL, LEA + LEA.
21106 static SDValue PerformMulCombine(SDNode *N, SelectionDAG &DAG,
21107 TargetLowering::DAGCombinerInfo &DCI) {
21108 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
21111 EVT VT = N->getValueType(0);
21112 if (VT != MVT::i64)
21115 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1));
21118 uint64_t MulAmt = C->getZExtValue();
21119 if (isPowerOf2_64(MulAmt) || MulAmt == 3 || MulAmt == 5 || MulAmt == 9)
21122 uint64_t MulAmt1 = 0;
21123 uint64_t MulAmt2 = 0;
21124 if ((MulAmt % 9) == 0) {
21126 MulAmt2 = MulAmt / 9;
21127 } else if ((MulAmt % 5) == 0) {
21129 MulAmt2 = MulAmt / 5;
21130 } else if ((MulAmt % 3) == 0) {
21132 MulAmt2 = MulAmt / 3;
21135 (isPowerOf2_64(MulAmt2) || MulAmt2 == 3 || MulAmt2 == 5 || MulAmt2 == 9)){
21138 if (isPowerOf2_64(MulAmt2) &&
21139 !(N->hasOneUse() && N->use_begin()->getOpcode() == ISD::ADD))
21140 // If second multiplifer is pow2, issue it first. We want the multiply by
21141 // 3, 5, or 9 to be folded into the addressing mode unless the lone use
21143 std::swap(MulAmt1, MulAmt2);
21146 if (isPowerOf2_64(MulAmt1))
21147 NewMul = DAG.getNode(ISD::SHL, DL, VT, N->getOperand(0),
21148 DAG.getConstant(Log2_64(MulAmt1), MVT::i8));
21150 NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, N->getOperand(0),
21151 DAG.getConstant(MulAmt1, VT));
21153 if (isPowerOf2_64(MulAmt2))
21154 NewMul = DAG.getNode(ISD::SHL, DL, VT, NewMul,
21155 DAG.getConstant(Log2_64(MulAmt2), MVT::i8));
21157 NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, NewMul,
21158 DAG.getConstant(MulAmt2, VT));
21160 // Do not add new nodes to DAG combiner worklist.
21161 DCI.CombineTo(N, NewMul, false);
21166 static SDValue PerformSHLCombine(SDNode *N, SelectionDAG &DAG) {
21167 SDValue N0 = N->getOperand(0);
21168 SDValue N1 = N->getOperand(1);
21169 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
21170 EVT VT = N0.getValueType();
21172 // fold (shl (and (setcc_c), c1), c2) -> (and setcc_c, (c1 << c2))
21173 // since the result of setcc_c is all zero's or all ones.
21174 if (VT.isInteger() && !VT.isVector() &&
21175 N1C && N0.getOpcode() == ISD::AND &&
21176 N0.getOperand(1).getOpcode() == ISD::Constant) {
21177 SDValue N00 = N0.getOperand(0);
21178 if (N00.getOpcode() == X86ISD::SETCC_CARRY ||
21179 ((N00.getOpcode() == ISD::ANY_EXTEND ||
21180 N00.getOpcode() == ISD::ZERO_EXTEND) &&
21181 N00.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY)) {
21182 APInt Mask = cast<ConstantSDNode>(N0.getOperand(1))->getAPIntValue();
21183 APInt ShAmt = N1C->getAPIntValue();
21184 Mask = Mask.shl(ShAmt);
21186 return DAG.getNode(ISD::AND, SDLoc(N), VT,
21187 N00, DAG.getConstant(Mask, VT));
21191 // Hardware support for vector shifts is sparse which makes us scalarize the
21192 // vector operations in many cases. Also, on sandybridge ADD is faster than
21194 // (shl V, 1) -> add V,V
21195 if (auto *N1BV = dyn_cast<BuildVectorSDNode>(N1))
21196 if (auto *N1SplatC = N1BV->getConstantSplatNode()) {
21197 assert(N0.getValueType().isVector() && "Invalid vector shift type");
21198 // We shift all of the values by one. In many cases we do not have
21199 // hardware support for this operation. This is better expressed as an ADD
21201 if (N1SplatC->getZExtValue() == 1)
21202 return DAG.getNode(ISD::ADD, SDLoc(N), VT, N0, N0);
21208 /// \brief Returns a vector of 0s if the node in input is a vector logical
21209 /// shift by a constant amount which is known to be bigger than or equal
21210 /// to the vector element size in bits.
21211 static SDValue performShiftToAllZeros(SDNode *N, SelectionDAG &DAG,
21212 const X86Subtarget *Subtarget) {
21213 EVT VT = N->getValueType(0);
21215 if (VT != MVT::v2i64 && VT != MVT::v4i32 && VT != MVT::v8i16 &&
21216 (!Subtarget->hasInt256() ||
21217 (VT != MVT::v4i64 && VT != MVT::v8i32 && VT != MVT::v16i16)))
21220 SDValue Amt = N->getOperand(1);
21222 if (auto *AmtBV = dyn_cast<BuildVectorSDNode>(Amt))
21223 if (auto *AmtSplat = AmtBV->getConstantSplatNode()) {
21224 APInt ShiftAmt = AmtSplat->getAPIntValue();
21225 unsigned MaxAmount = VT.getVectorElementType().getSizeInBits();
21227 // SSE2/AVX2 logical shifts always return a vector of 0s
21228 // if the shift amount is bigger than or equal to
21229 // the element size. The constant shift amount will be
21230 // encoded as a 8-bit immediate.
21231 if (ShiftAmt.trunc(8).uge(MaxAmount))
21232 return getZeroVector(VT, Subtarget, DAG, DL);
21238 /// PerformShiftCombine - Combine shifts.
21239 static SDValue PerformShiftCombine(SDNode* N, SelectionDAG &DAG,
21240 TargetLowering::DAGCombinerInfo &DCI,
21241 const X86Subtarget *Subtarget) {
21242 if (N->getOpcode() == ISD::SHL) {
21243 SDValue V = PerformSHLCombine(N, DAG);
21244 if (V.getNode()) return V;
21247 if (N->getOpcode() != ISD::SRA) {
21248 // Try to fold this logical shift into a zero vector.
21249 SDValue V = performShiftToAllZeros(N, DAG, Subtarget);
21250 if (V.getNode()) return V;
21256 // CMPEQCombine - Recognize the distinctive (AND (setcc ...) (setcc ..))
21257 // where both setccs reference the same FP CMP, and rewrite for CMPEQSS
21258 // and friends. Likewise for OR -> CMPNEQSS.
21259 static SDValue CMPEQCombine(SDNode *N, SelectionDAG &DAG,
21260 TargetLowering::DAGCombinerInfo &DCI,
21261 const X86Subtarget *Subtarget) {
21264 // SSE1 supports CMP{eq|ne}SS, and SSE2 added CMP{eq|ne}SD, but
21265 // we're requiring SSE2 for both.
21266 if (Subtarget->hasSSE2() && isAndOrOfSetCCs(SDValue(N, 0U), opcode)) {
21267 SDValue N0 = N->getOperand(0);
21268 SDValue N1 = N->getOperand(1);
21269 SDValue CMP0 = N0->getOperand(1);
21270 SDValue CMP1 = N1->getOperand(1);
21273 // The SETCCs should both refer to the same CMP.
21274 if (CMP0.getOpcode() != X86ISD::CMP || CMP0 != CMP1)
21277 SDValue CMP00 = CMP0->getOperand(0);
21278 SDValue CMP01 = CMP0->getOperand(1);
21279 EVT VT = CMP00.getValueType();
21281 if (VT == MVT::f32 || VT == MVT::f64) {
21282 bool ExpectingFlags = false;
21283 // Check for any users that want flags:
21284 for (SDNode::use_iterator UI = N->use_begin(), UE = N->use_end();
21285 !ExpectingFlags && UI != UE; ++UI)
21286 switch (UI->getOpcode()) {
21291 ExpectingFlags = true;
21293 case ISD::CopyToReg:
21294 case ISD::SIGN_EXTEND:
21295 case ISD::ZERO_EXTEND:
21296 case ISD::ANY_EXTEND:
21300 if (!ExpectingFlags) {
21301 enum X86::CondCode cc0 = (enum X86::CondCode)N0.getConstantOperandVal(0);
21302 enum X86::CondCode cc1 = (enum X86::CondCode)N1.getConstantOperandVal(0);
21304 if (cc1 == X86::COND_E || cc1 == X86::COND_NE) {
21305 X86::CondCode tmp = cc0;
21310 if ((cc0 == X86::COND_E && cc1 == X86::COND_NP) ||
21311 (cc0 == X86::COND_NE && cc1 == X86::COND_P)) {
21312 // FIXME: need symbolic constants for these magic numbers.
21313 // See X86ATTInstPrinter.cpp:printSSECC().
21314 unsigned x86cc = (cc0 == X86::COND_E) ? 0 : 4;
21315 if (Subtarget->hasAVX512()) {
21316 SDValue FSetCC = DAG.getNode(X86ISD::FSETCC, DL, MVT::i1, CMP00,
21317 CMP01, DAG.getConstant(x86cc, MVT::i8));
21318 if (N->getValueType(0) != MVT::i1)
21319 return DAG.getNode(ISD::ZERO_EXTEND, DL, N->getValueType(0),
21323 SDValue OnesOrZeroesF = DAG.getNode(X86ISD::FSETCC, DL,
21324 CMP00.getValueType(), CMP00, CMP01,
21325 DAG.getConstant(x86cc, MVT::i8));
21327 bool is64BitFP = (CMP00.getValueType() == MVT::f64);
21328 MVT IntVT = is64BitFP ? MVT::i64 : MVT::i32;
21330 if (is64BitFP && !Subtarget->is64Bit()) {
21331 // On a 32-bit target, we cannot bitcast the 64-bit float to a
21332 // 64-bit integer, since that's not a legal type. Since
21333 // OnesOrZeroesF is all ones of all zeroes, we don't need all the
21334 // bits, but can do this little dance to extract the lowest 32 bits
21335 // and work with those going forward.
21336 SDValue Vector64 = DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, MVT::v2f64,
21338 SDValue Vector32 = DAG.getNode(ISD::BITCAST, DL, MVT::v4f32,
21340 OnesOrZeroesF = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32,
21341 Vector32, DAG.getIntPtrConstant(0));
21345 SDValue OnesOrZeroesI = DAG.getNode(ISD::BITCAST, DL, IntVT, OnesOrZeroesF);
21346 SDValue ANDed = DAG.getNode(ISD::AND, DL, IntVT, OnesOrZeroesI,
21347 DAG.getConstant(1, IntVT));
21348 SDValue OneBitOfTruth = DAG.getNode(ISD::TRUNCATE, DL, MVT::i8, ANDed);
21349 return OneBitOfTruth;
21357 /// CanFoldXORWithAllOnes - Test whether the XOR operand is a AllOnes vector
21358 /// so it can be folded inside ANDNP.
21359 static bool CanFoldXORWithAllOnes(const SDNode *N) {
21360 EVT VT = N->getValueType(0);
21362 // Match direct AllOnes for 128 and 256-bit vectors
21363 if (ISD::isBuildVectorAllOnes(N))
21366 // Look through a bit convert.
21367 if (N->getOpcode() == ISD::BITCAST)
21368 N = N->getOperand(0).getNode();
21370 // Sometimes the operand may come from a insert_subvector building a 256-bit
21372 if (VT.is256BitVector() &&
21373 N->getOpcode() == ISD::INSERT_SUBVECTOR) {
21374 SDValue V1 = N->getOperand(0);
21375 SDValue V2 = N->getOperand(1);
21377 if (V1.getOpcode() == ISD::INSERT_SUBVECTOR &&
21378 V1.getOperand(0).getOpcode() == ISD::UNDEF &&
21379 ISD::isBuildVectorAllOnes(V1.getOperand(1).getNode()) &&
21380 ISD::isBuildVectorAllOnes(V2.getNode()))
21387 // On AVX/AVX2 the type v8i1 is legalized to v8i16, which is an XMM sized
21388 // register. In most cases we actually compare or select YMM-sized registers
21389 // and mixing the two types creates horrible code. This method optimizes
21390 // some of the transition sequences.
21391 static SDValue WidenMaskArithmetic(SDNode *N, SelectionDAG &DAG,
21392 TargetLowering::DAGCombinerInfo &DCI,
21393 const X86Subtarget *Subtarget) {
21394 EVT VT = N->getValueType(0);
21395 if (!VT.is256BitVector())
21398 assert((N->getOpcode() == ISD::ANY_EXTEND ||
21399 N->getOpcode() == ISD::ZERO_EXTEND ||
21400 N->getOpcode() == ISD::SIGN_EXTEND) && "Invalid Node");
21402 SDValue Narrow = N->getOperand(0);
21403 EVT NarrowVT = Narrow->getValueType(0);
21404 if (!NarrowVT.is128BitVector())
21407 if (Narrow->getOpcode() != ISD::XOR &&
21408 Narrow->getOpcode() != ISD::AND &&
21409 Narrow->getOpcode() != ISD::OR)
21412 SDValue N0 = Narrow->getOperand(0);
21413 SDValue N1 = Narrow->getOperand(1);
21416 // The Left side has to be a trunc.
21417 if (N0.getOpcode() != ISD::TRUNCATE)
21420 // The type of the truncated inputs.
21421 EVT WideVT = N0->getOperand(0)->getValueType(0);
21425 // The right side has to be a 'trunc' or a constant vector.
21426 bool RHSTrunc = N1.getOpcode() == ISD::TRUNCATE;
21427 ConstantSDNode *RHSConstSplat = nullptr;
21428 if (auto *RHSBV = dyn_cast<BuildVectorSDNode>(N1))
21429 RHSConstSplat = RHSBV->getConstantSplatNode();
21430 if (!RHSTrunc && !RHSConstSplat)
21433 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
21435 if (!TLI.isOperationLegalOrPromote(Narrow->getOpcode(), WideVT))
21438 // Set N0 and N1 to hold the inputs to the new wide operation.
21439 N0 = N0->getOperand(0);
21440 if (RHSConstSplat) {
21441 N1 = DAG.getNode(ISD::ZERO_EXTEND, DL, WideVT.getScalarType(),
21442 SDValue(RHSConstSplat, 0));
21443 SmallVector<SDValue, 8> C(WideVT.getVectorNumElements(), N1);
21444 N1 = DAG.getNode(ISD::BUILD_VECTOR, DL, WideVT, C);
21445 } else if (RHSTrunc) {
21446 N1 = N1->getOperand(0);
21449 // Generate the wide operation.
21450 SDValue Op = DAG.getNode(Narrow->getOpcode(), DL, WideVT, N0, N1);
21451 unsigned Opcode = N->getOpcode();
21453 case ISD::ANY_EXTEND:
21455 case ISD::ZERO_EXTEND: {
21456 unsigned InBits = NarrowVT.getScalarType().getSizeInBits();
21457 APInt Mask = APInt::getAllOnesValue(InBits);
21458 Mask = Mask.zext(VT.getScalarType().getSizeInBits());
21459 return DAG.getNode(ISD::AND, DL, VT,
21460 Op, DAG.getConstant(Mask, VT));
21462 case ISD::SIGN_EXTEND:
21463 return DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, VT,
21464 Op, DAG.getValueType(NarrowVT));
21466 llvm_unreachable("Unexpected opcode");
21470 static SDValue PerformAndCombine(SDNode *N, SelectionDAG &DAG,
21471 TargetLowering::DAGCombinerInfo &DCI,
21472 const X86Subtarget *Subtarget) {
21473 EVT VT = N->getValueType(0);
21474 if (DCI.isBeforeLegalizeOps())
21477 SDValue R = CMPEQCombine(N, DAG, DCI, Subtarget);
21481 // Create BEXTR instructions
21482 // BEXTR is ((X >> imm) & (2**size-1))
21483 if (VT == MVT::i32 || VT == MVT::i64) {
21484 SDValue N0 = N->getOperand(0);
21485 SDValue N1 = N->getOperand(1);
21488 // Check for BEXTR.
21489 if ((Subtarget->hasBMI() || Subtarget->hasTBM()) &&
21490 (N0.getOpcode() == ISD::SRA || N0.getOpcode() == ISD::SRL)) {
21491 ConstantSDNode *MaskNode = dyn_cast<ConstantSDNode>(N1);
21492 ConstantSDNode *ShiftNode = dyn_cast<ConstantSDNode>(N0.getOperand(1));
21493 if (MaskNode && ShiftNode) {
21494 uint64_t Mask = MaskNode->getZExtValue();
21495 uint64_t Shift = ShiftNode->getZExtValue();
21496 if (isMask_64(Mask)) {
21497 uint64_t MaskSize = CountPopulation_64(Mask);
21498 if (Shift + MaskSize <= VT.getSizeInBits())
21499 return DAG.getNode(X86ISD::BEXTR, DL, VT, N0.getOperand(0),
21500 DAG.getConstant(Shift | (MaskSize << 8), VT));
21508 // Want to form ANDNP nodes:
21509 // 1) In the hopes of then easily combining them with OR and AND nodes
21510 // to form PBLEND/PSIGN.
21511 // 2) To match ANDN packed intrinsics
21512 if (VT != MVT::v2i64 && VT != MVT::v4i64)
21515 SDValue N0 = N->getOperand(0);
21516 SDValue N1 = N->getOperand(1);
21519 // Check LHS for vnot
21520 if (N0.getOpcode() == ISD::XOR &&
21521 //ISD::isBuildVectorAllOnes(N0.getOperand(1).getNode()))
21522 CanFoldXORWithAllOnes(N0.getOperand(1).getNode()))
21523 return DAG.getNode(X86ISD::ANDNP, DL, VT, N0.getOperand(0), N1);
21525 // Check RHS for vnot
21526 if (N1.getOpcode() == ISD::XOR &&
21527 //ISD::isBuildVectorAllOnes(N1.getOperand(1).getNode()))
21528 CanFoldXORWithAllOnes(N1.getOperand(1).getNode()))
21529 return DAG.getNode(X86ISD::ANDNP, DL, VT, N1.getOperand(0), N0);
21534 static SDValue PerformOrCombine(SDNode *N, SelectionDAG &DAG,
21535 TargetLowering::DAGCombinerInfo &DCI,
21536 const X86Subtarget *Subtarget) {
21537 if (DCI.isBeforeLegalizeOps())
21540 SDValue R = CMPEQCombine(N, DAG, DCI, Subtarget);
21544 SDValue N0 = N->getOperand(0);
21545 SDValue N1 = N->getOperand(1);
21546 EVT VT = N->getValueType(0);
21548 // look for psign/blend
21549 if (VT == MVT::v2i64 || VT == MVT::v4i64) {
21550 if (!Subtarget->hasSSSE3() ||
21551 (VT == MVT::v4i64 && !Subtarget->hasInt256()))
21554 // Canonicalize pandn to RHS
21555 if (N0.getOpcode() == X86ISD::ANDNP)
21557 // or (and (m, y), (pandn m, x))
21558 if (N0.getOpcode() == ISD::AND && N1.getOpcode() == X86ISD::ANDNP) {
21559 SDValue Mask = N1.getOperand(0);
21560 SDValue X = N1.getOperand(1);
21562 if (N0.getOperand(0) == Mask)
21563 Y = N0.getOperand(1);
21564 if (N0.getOperand(1) == Mask)
21565 Y = N0.getOperand(0);
21567 // Check to see if the mask appeared in both the AND and ANDNP and
21571 // Validate that X, Y, and Mask are BIT_CONVERTS, and see through them.
21572 // Look through mask bitcast.
21573 if (Mask.getOpcode() == ISD::BITCAST)
21574 Mask = Mask.getOperand(0);
21575 if (X.getOpcode() == ISD::BITCAST)
21576 X = X.getOperand(0);
21577 if (Y.getOpcode() == ISD::BITCAST)
21578 Y = Y.getOperand(0);
21580 EVT MaskVT = Mask.getValueType();
21582 // Validate that the Mask operand is a vector sra node.
21583 // FIXME: what to do for bytes, since there is a psignb/pblendvb, but
21584 // there is no psrai.b
21585 unsigned EltBits = MaskVT.getVectorElementType().getSizeInBits();
21586 unsigned SraAmt = ~0;
21587 if (Mask.getOpcode() == ISD::SRA) {
21588 if (auto *AmtBV = dyn_cast<BuildVectorSDNode>(Mask.getOperand(1)))
21589 if (auto *AmtConst = AmtBV->getConstantSplatNode())
21590 SraAmt = AmtConst->getZExtValue();
21591 } else if (Mask.getOpcode() == X86ISD::VSRAI) {
21592 SDValue SraC = Mask.getOperand(1);
21593 SraAmt = cast<ConstantSDNode>(SraC)->getZExtValue();
21595 if ((SraAmt + 1) != EltBits)
21600 // Now we know we at least have a plendvb with the mask val. See if
21601 // we can form a psignb/w/d.
21602 // psign = x.type == y.type == mask.type && y = sub(0, x);
21603 if (Y.getOpcode() == ISD::SUB && Y.getOperand(1) == X &&
21604 ISD::isBuildVectorAllZeros(Y.getOperand(0).getNode()) &&
21605 X.getValueType() == MaskVT && Y.getValueType() == MaskVT) {
21606 assert((EltBits == 8 || EltBits == 16 || EltBits == 32) &&
21607 "Unsupported VT for PSIGN");
21608 Mask = DAG.getNode(X86ISD::PSIGN, DL, MaskVT, X, Mask.getOperand(0));
21609 return DAG.getNode(ISD::BITCAST, DL, VT, Mask);
21611 // PBLENDVB only available on SSE 4.1
21612 if (!Subtarget->hasSSE41())
21615 EVT BlendVT = (VT == MVT::v4i64) ? MVT::v32i8 : MVT::v16i8;
21617 X = DAG.getNode(ISD::BITCAST, DL, BlendVT, X);
21618 Y = DAG.getNode(ISD::BITCAST, DL, BlendVT, Y);
21619 Mask = DAG.getNode(ISD::BITCAST, DL, BlendVT, Mask);
21620 Mask = DAG.getNode(ISD::VSELECT, DL, BlendVT, Mask, Y, X);
21621 return DAG.getNode(ISD::BITCAST, DL, VT, Mask);
21625 if (VT != MVT::i16 && VT != MVT::i32 && VT != MVT::i64)
21628 // fold (or (x << c) | (y >> (64 - c))) ==> (shld64 x, y, c)
21629 MachineFunction &MF = DAG.getMachineFunction();
21630 bool OptForSize = MF.getFunction()->getAttributes().
21631 hasAttribute(AttributeSet::FunctionIndex, Attribute::OptimizeForSize);
21633 // SHLD/SHRD instructions have lower register pressure, but on some
21634 // platforms they have higher latency than the equivalent
21635 // series of shifts/or that would otherwise be generated.
21636 // Don't fold (or (x << c) | (y >> (64 - c))) if SHLD/SHRD instructions
21637 // have higher latencies and we are not optimizing for size.
21638 if (!OptForSize && Subtarget->isSHLDSlow())
21641 if (N0.getOpcode() == ISD::SRL && N1.getOpcode() == ISD::SHL)
21643 if (N0.getOpcode() != ISD::SHL || N1.getOpcode() != ISD::SRL)
21645 if (!N0.hasOneUse() || !N1.hasOneUse())
21648 SDValue ShAmt0 = N0.getOperand(1);
21649 if (ShAmt0.getValueType() != MVT::i8)
21651 SDValue ShAmt1 = N1.getOperand(1);
21652 if (ShAmt1.getValueType() != MVT::i8)
21654 if (ShAmt0.getOpcode() == ISD::TRUNCATE)
21655 ShAmt0 = ShAmt0.getOperand(0);
21656 if (ShAmt1.getOpcode() == ISD::TRUNCATE)
21657 ShAmt1 = ShAmt1.getOperand(0);
21660 unsigned Opc = X86ISD::SHLD;
21661 SDValue Op0 = N0.getOperand(0);
21662 SDValue Op1 = N1.getOperand(0);
21663 if (ShAmt0.getOpcode() == ISD::SUB) {
21664 Opc = X86ISD::SHRD;
21665 std::swap(Op0, Op1);
21666 std::swap(ShAmt0, ShAmt1);
21669 unsigned Bits = VT.getSizeInBits();
21670 if (ShAmt1.getOpcode() == ISD::SUB) {
21671 SDValue Sum = ShAmt1.getOperand(0);
21672 if (ConstantSDNode *SumC = dyn_cast<ConstantSDNode>(Sum)) {
21673 SDValue ShAmt1Op1 = ShAmt1.getOperand(1);
21674 if (ShAmt1Op1.getNode()->getOpcode() == ISD::TRUNCATE)
21675 ShAmt1Op1 = ShAmt1Op1.getOperand(0);
21676 if (SumC->getSExtValue() == Bits && ShAmt1Op1 == ShAmt0)
21677 return DAG.getNode(Opc, DL, VT,
21679 DAG.getNode(ISD::TRUNCATE, DL,
21682 } else if (ConstantSDNode *ShAmt1C = dyn_cast<ConstantSDNode>(ShAmt1)) {
21683 ConstantSDNode *ShAmt0C = dyn_cast<ConstantSDNode>(ShAmt0);
21685 ShAmt0C->getSExtValue() + ShAmt1C->getSExtValue() == Bits)
21686 return DAG.getNode(Opc, DL, VT,
21687 N0.getOperand(0), N1.getOperand(0),
21688 DAG.getNode(ISD::TRUNCATE, DL,
21695 // Generate NEG and CMOV for integer abs.
21696 static SDValue performIntegerAbsCombine(SDNode *N, SelectionDAG &DAG) {
21697 EVT VT = N->getValueType(0);
21699 // Since X86 does not have CMOV for 8-bit integer, we don't convert
21700 // 8-bit integer abs to NEG and CMOV.
21701 if (VT.isInteger() && VT.getSizeInBits() == 8)
21704 SDValue N0 = N->getOperand(0);
21705 SDValue N1 = N->getOperand(1);
21708 // Check pattern of XOR(ADD(X,Y), Y) where Y is SRA(X, size(X)-1)
21709 // and change it to SUB and CMOV.
21710 if (VT.isInteger() && N->getOpcode() == ISD::XOR &&
21711 N0.getOpcode() == ISD::ADD &&
21712 N0.getOperand(1) == N1 &&
21713 N1.getOpcode() == ISD::SRA &&
21714 N1.getOperand(0) == N0.getOperand(0))
21715 if (ConstantSDNode *Y1C = dyn_cast<ConstantSDNode>(N1.getOperand(1)))
21716 if (Y1C->getAPIntValue() == VT.getSizeInBits()-1) {
21717 // Generate SUB & CMOV.
21718 SDValue Neg = DAG.getNode(X86ISD::SUB, DL, DAG.getVTList(VT, MVT::i32),
21719 DAG.getConstant(0, VT), N0.getOperand(0));
21721 SDValue Ops[] = { N0.getOperand(0), Neg,
21722 DAG.getConstant(X86::COND_GE, MVT::i8),
21723 SDValue(Neg.getNode(), 1) };
21724 return DAG.getNode(X86ISD::CMOV, DL, DAG.getVTList(VT, MVT::Glue), Ops);
21729 // PerformXorCombine - Attempts to turn XOR nodes into BLSMSK nodes
21730 static SDValue PerformXorCombine(SDNode *N, SelectionDAG &DAG,
21731 TargetLowering::DAGCombinerInfo &DCI,
21732 const X86Subtarget *Subtarget) {
21733 if (DCI.isBeforeLegalizeOps())
21736 if (Subtarget->hasCMov()) {
21737 SDValue RV = performIntegerAbsCombine(N, DAG);
21745 /// PerformLOADCombine - Do target-specific dag combines on LOAD nodes.
21746 static SDValue PerformLOADCombine(SDNode *N, SelectionDAG &DAG,
21747 TargetLowering::DAGCombinerInfo &DCI,
21748 const X86Subtarget *Subtarget) {
21749 LoadSDNode *Ld = cast<LoadSDNode>(N);
21750 EVT RegVT = Ld->getValueType(0);
21751 EVT MemVT = Ld->getMemoryVT();
21753 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
21755 // On Sandybridge unaligned 256bit loads are inefficient.
21756 ISD::LoadExtType Ext = Ld->getExtensionType();
21757 unsigned Alignment = Ld->getAlignment();
21758 bool IsAligned = Alignment == 0 || Alignment >= MemVT.getSizeInBits()/8;
21759 if (RegVT.is256BitVector() && !Subtarget->hasInt256() &&
21760 !DCI.isBeforeLegalizeOps() && !IsAligned && Ext == ISD::NON_EXTLOAD) {
21761 unsigned NumElems = RegVT.getVectorNumElements();
21765 SDValue Ptr = Ld->getBasePtr();
21766 SDValue Increment = DAG.getConstant(16, TLI.getPointerTy());
21768 EVT HalfVT = EVT::getVectorVT(*DAG.getContext(), MemVT.getScalarType(),
21770 SDValue Load1 = DAG.getLoad(HalfVT, dl, Ld->getChain(), Ptr,
21771 Ld->getPointerInfo(), Ld->isVolatile(),
21772 Ld->isNonTemporal(), Ld->isInvariant(),
21774 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr, Increment);
21775 SDValue Load2 = DAG.getLoad(HalfVT, dl, Ld->getChain(), Ptr,
21776 Ld->getPointerInfo(), Ld->isVolatile(),
21777 Ld->isNonTemporal(), Ld->isInvariant(),
21778 std::min(16U, Alignment));
21779 SDValue TF = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
21781 Load2.getValue(1));
21783 SDValue NewVec = DAG.getUNDEF(RegVT);
21784 NewVec = Insert128BitVector(NewVec, Load1, 0, DAG, dl);
21785 NewVec = Insert128BitVector(NewVec, Load2, NumElems/2, DAG, dl);
21786 return DCI.CombineTo(N, NewVec, TF, true);
21792 /// PerformSTORECombine - Do target-specific dag combines on STORE nodes.
21793 static SDValue PerformSTORECombine(SDNode *N, SelectionDAG &DAG,
21794 const X86Subtarget *Subtarget) {
21795 StoreSDNode *St = cast<StoreSDNode>(N);
21796 EVT VT = St->getValue().getValueType();
21797 EVT StVT = St->getMemoryVT();
21799 SDValue StoredVal = St->getOperand(1);
21800 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
21802 // If we are saving a concatenation of two XMM registers, perform two stores.
21803 // On Sandy Bridge, 256-bit memory operations are executed by two
21804 // 128-bit ports. However, on Haswell it is better to issue a single 256-bit
21805 // memory operation.
21806 unsigned Alignment = St->getAlignment();
21807 bool IsAligned = Alignment == 0 || Alignment >= VT.getSizeInBits()/8;
21808 if (VT.is256BitVector() && !Subtarget->hasInt256() &&
21809 StVT == VT && !IsAligned) {
21810 unsigned NumElems = VT.getVectorNumElements();
21814 SDValue Value0 = Extract128BitVector(StoredVal, 0, DAG, dl);
21815 SDValue Value1 = Extract128BitVector(StoredVal, NumElems/2, DAG, dl);
21817 SDValue Stride = DAG.getConstant(16, TLI.getPointerTy());
21818 SDValue Ptr0 = St->getBasePtr();
21819 SDValue Ptr1 = DAG.getNode(ISD::ADD, dl, Ptr0.getValueType(), Ptr0, Stride);
21821 SDValue Ch0 = DAG.getStore(St->getChain(), dl, Value0, Ptr0,
21822 St->getPointerInfo(), St->isVolatile(),
21823 St->isNonTemporal(), Alignment);
21824 SDValue Ch1 = DAG.getStore(St->getChain(), dl, Value1, Ptr1,
21825 St->getPointerInfo(), St->isVolatile(),
21826 St->isNonTemporal(),
21827 std::min(16U, Alignment));
21828 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Ch0, Ch1);
21831 // Optimize trunc store (of multiple scalars) to shuffle and store.
21832 // First, pack all of the elements in one place. Next, store to memory
21833 // in fewer chunks.
21834 if (St->isTruncatingStore() && VT.isVector()) {
21835 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
21836 unsigned NumElems = VT.getVectorNumElements();
21837 assert(StVT != VT && "Cannot truncate to the same type");
21838 unsigned FromSz = VT.getVectorElementType().getSizeInBits();
21839 unsigned ToSz = StVT.getVectorElementType().getSizeInBits();
21841 // From, To sizes and ElemCount must be pow of two
21842 if (!isPowerOf2_32(NumElems * FromSz * ToSz)) return SDValue();
21843 // We are going to use the original vector elt for storing.
21844 // Accumulated smaller vector elements must be a multiple of the store size.
21845 if (0 != (NumElems * FromSz) % ToSz) return SDValue();
21847 unsigned SizeRatio = FromSz / ToSz;
21849 assert(SizeRatio * NumElems * ToSz == VT.getSizeInBits());
21851 // Create a type on which we perform the shuffle
21852 EVT WideVecVT = EVT::getVectorVT(*DAG.getContext(),
21853 StVT.getScalarType(), NumElems*SizeRatio);
21855 assert(WideVecVT.getSizeInBits() == VT.getSizeInBits());
21857 SDValue WideVec = DAG.getNode(ISD::BITCAST, dl, WideVecVT, St->getValue());
21858 SmallVector<int, 8> ShuffleVec(NumElems * SizeRatio, -1);
21859 for (unsigned i = 0; i != NumElems; ++i)
21860 ShuffleVec[i] = i * SizeRatio;
21862 // Can't shuffle using an illegal type.
21863 if (!TLI.isTypeLegal(WideVecVT))
21866 SDValue Shuff = DAG.getVectorShuffle(WideVecVT, dl, WideVec,
21867 DAG.getUNDEF(WideVecVT),
21869 // At this point all of the data is stored at the bottom of the
21870 // register. We now need to save it to mem.
21872 // Find the largest store unit
21873 MVT StoreType = MVT::i8;
21874 for (unsigned tp = MVT::FIRST_INTEGER_VALUETYPE;
21875 tp < MVT::LAST_INTEGER_VALUETYPE; ++tp) {
21876 MVT Tp = (MVT::SimpleValueType)tp;
21877 if (TLI.isTypeLegal(Tp) && Tp.getSizeInBits() <= NumElems * ToSz)
21881 // On 32bit systems, we can't save 64bit integers. Try bitcasting to F64.
21882 if (TLI.isTypeLegal(MVT::f64) && StoreType.getSizeInBits() < 64 &&
21883 (64 <= NumElems * ToSz))
21884 StoreType = MVT::f64;
21886 // Bitcast the original vector into a vector of store-size units
21887 EVT StoreVecVT = EVT::getVectorVT(*DAG.getContext(),
21888 StoreType, VT.getSizeInBits()/StoreType.getSizeInBits());
21889 assert(StoreVecVT.getSizeInBits() == VT.getSizeInBits());
21890 SDValue ShuffWide = DAG.getNode(ISD::BITCAST, dl, StoreVecVT, Shuff);
21891 SmallVector<SDValue, 8> Chains;
21892 SDValue Increment = DAG.getConstant(StoreType.getSizeInBits()/8,
21893 TLI.getPointerTy());
21894 SDValue Ptr = St->getBasePtr();
21896 // Perform one or more big stores into memory.
21897 for (unsigned i=0, e=(ToSz*NumElems)/StoreType.getSizeInBits(); i!=e; ++i) {
21898 SDValue SubVec = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl,
21899 StoreType, ShuffWide,
21900 DAG.getIntPtrConstant(i));
21901 SDValue Ch = DAG.getStore(St->getChain(), dl, SubVec, Ptr,
21902 St->getPointerInfo(), St->isVolatile(),
21903 St->isNonTemporal(), St->getAlignment());
21904 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr, Increment);
21905 Chains.push_back(Ch);
21908 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Chains);
21911 // Turn load->store of MMX types into GPR load/stores. This avoids clobbering
21912 // the FP state in cases where an emms may be missing.
21913 // A preferable solution to the general problem is to figure out the right
21914 // places to insert EMMS. This qualifies as a quick hack.
21916 // Similarly, turn load->store of i64 into double load/stores in 32-bit mode.
21917 if (VT.getSizeInBits() != 64)
21920 const Function *F = DAG.getMachineFunction().getFunction();
21921 bool NoImplicitFloatOps = F->getAttributes().
21922 hasAttribute(AttributeSet::FunctionIndex, Attribute::NoImplicitFloat);
21923 bool F64IsLegal = !DAG.getTarget().Options.UseSoftFloat && !NoImplicitFloatOps
21924 && Subtarget->hasSSE2();
21925 if ((VT.isVector() ||
21926 (VT == MVT::i64 && F64IsLegal && !Subtarget->is64Bit())) &&
21927 isa<LoadSDNode>(St->getValue()) &&
21928 !cast<LoadSDNode>(St->getValue())->isVolatile() &&
21929 St->getChain().hasOneUse() && !St->isVolatile()) {
21930 SDNode* LdVal = St->getValue().getNode();
21931 LoadSDNode *Ld = nullptr;
21932 int TokenFactorIndex = -1;
21933 SmallVector<SDValue, 8> Ops;
21934 SDNode* ChainVal = St->getChain().getNode();
21935 // Must be a store of a load. We currently handle two cases: the load
21936 // is a direct child, and it's under an intervening TokenFactor. It is
21937 // possible to dig deeper under nested TokenFactors.
21938 if (ChainVal == LdVal)
21939 Ld = cast<LoadSDNode>(St->getChain());
21940 else if (St->getValue().hasOneUse() &&
21941 ChainVal->getOpcode() == ISD::TokenFactor) {
21942 for (unsigned i = 0, e = ChainVal->getNumOperands(); i != e; ++i) {
21943 if (ChainVal->getOperand(i).getNode() == LdVal) {
21944 TokenFactorIndex = i;
21945 Ld = cast<LoadSDNode>(St->getValue());
21947 Ops.push_back(ChainVal->getOperand(i));
21951 if (!Ld || !ISD::isNormalLoad(Ld))
21954 // If this is not the MMX case, i.e. we are just turning i64 load/store
21955 // into f64 load/store, avoid the transformation if there are multiple
21956 // uses of the loaded value.
21957 if (!VT.isVector() && !Ld->hasNUsesOfValue(1, 0))
21962 // If we are a 64-bit capable x86, lower to a single movq load/store pair.
21963 // Otherwise, if it's legal to use f64 SSE instructions, use f64 load/store
21965 if (Subtarget->is64Bit() || F64IsLegal) {
21966 EVT LdVT = Subtarget->is64Bit() ? MVT::i64 : MVT::f64;
21967 SDValue NewLd = DAG.getLoad(LdVT, LdDL, Ld->getChain(), Ld->getBasePtr(),
21968 Ld->getPointerInfo(), Ld->isVolatile(),
21969 Ld->isNonTemporal(), Ld->isInvariant(),
21970 Ld->getAlignment());
21971 SDValue NewChain = NewLd.getValue(1);
21972 if (TokenFactorIndex != -1) {
21973 Ops.push_back(NewChain);
21974 NewChain = DAG.getNode(ISD::TokenFactor, LdDL, MVT::Other, Ops);
21976 return DAG.getStore(NewChain, StDL, NewLd, St->getBasePtr(),
21977 St->getPointerInfo(),
21978 St->isVolatile(), St->isNonTemporal(),
21979 St->getAlignment());
21982 // Otherwise, lower to two pairs of 32-bit loads / stores.
21983 SDValue LoAddr = Ld->getBasePtr();
21984 SDValue HiAddr = DAG.getNode(ISD::ADD, LdDL, MVT::i32, LoAddr,
21985 DAG.getConstant(4, MVT::i32));
21987 SDValue LoLd = DAG.getLoad(MVT::i32, LdDL, Ld->getChain(), LoAddr,
21988 Ld->getPointerInfo(),
21989 Ld->isVolatile(), Ld->isNonTemporal(),
21990 Ld->isInvariant(), Ld->getAlignment());
21991 SDValue HiLd = DAG.getLoad(MVT::i32, LdDL, Ld->getChain(), HiAddr,
21992 Ld->getPointerInfo().getWithOffset(4),
21993 Ld->isVolatile(), Ld->isNonTemporal(),
21995 MinAlign(Ld->getAlignment(), 4));
21997 SDValue NewChain = LoLd.getValue(1);
21998 if (TokenFactorIndex != -1) {
21999 Ops.push_back(LoLd);
22000 Ops.push_back(HiLd);
22001 NewChain = DAG.getNode(ISD::TokenFactor, LdDL, MVT::Other, Ops);
22004 LoAddr = St->getBasePtr();
22005 HiAddr = DAG.getNode(ISD::ADD, StDL, MVT::i32, LoAddr,
22006 DAG.getConstant(4, MVT::i32));
22008 SDValue LoSt = DAG.getStore(NewChain, StDL, LoLd, LoAddr,
22009 St->getPointerInfo(),
22010 St->isVolatile(), St->isNonTemporal(),
22011 St->getAlignment());
22012 SDValue HiSt = DAG.getStore(NewChain, StDL, HiLd, HiAddr,
22013 St->getPointerInfo().getWithOffset(4),
22015 St->isNonTemporal(),
22016 MinAlign(St->getAlignment(), 4));
22017 return DAG.getNode(ISD::TokenFactor, StDL, MVT::Other, LoSt, HiSt);
22022 /// isHorizontalBinOp - Return 'true' if this vector operation is "horizontal"
22023 /// and return the operands for the horizontal operation in LHS and RHS. A
22024 /// horizontal operation performs the binary operation on successive elements
22025 /// of its first operand, then on successive elements of its second operand,
22026 /// returning the resulting values in a vector. For example, if
22027 /// A = < float a0, float a1, float a2, float a3 >
22029 /// B = < float b0, float b1, float b2, float b3 >
22030 /// then the result of doing a horizontal operation on A and B is
22031 /// A horizontal-op B = < a0 op a1, a2 op a3, b0 op b1, b2 op b3 >.
22032 /// In short, LHS and RHS are inspected to see if LHS op RHS is of the form
22033 /// A horizontal-op B, for some already available A and B, and if so then LHS is
22034 /// set to A, RHS to B, and the routine returns 'true'.
22035 /// Note that the binary operation should have the property that if one of the
22036 /// operands is UNDEF then the result is UNDEF.
22037 static bool isHorizontalBinOp(SDValue &LHS, SDValue &RHS, bool IsCommutative) {
22038 // Look for the following pattern: if
22039 // A = < float a0, float a1, float a2, float a3 >
22040 // B = < float b0, float b1, float b2, float b3 >
22042 // LHS = VECTOR_SHUFFLE A, B, <0, 2, 4, 6>
22043 // RHS = VECTOR_SHUFFLE A, B, <1, 3, 5, 7>
22044 // then LHS op RHS = < a0 op a1, a2 op a3, b0 op b1, b2 op b3 >
22045 // which is A horizontal-op B.
22047 // At least one of the operands should be a vector shuffle.
22048 if (LHS.getOpcode() != ISD::VECTOR_SHUFFLE &&
22049 RHS.getOpcode() != ISD::VECTOR_SHUFFLE)
22052 MVT VT = LHS.getSimpleValueType();
22054 assert((VT.is128BitVector() || VT.is256BitVector()) &&
22055 "Unsupported vector type for horizontal add/sub");
22057 // Handle 128 and 256-bit vector lengths. AVX defines horizontal add/sub to
22058 // operate independently on 128-bit lanes.
22059 unsigned NumElts = VT.getVectorNumElements();
22060 unsigned NumLanes = VT.getSizeInBits()/128;
22061 unsigned NumLaneElts = NumElts / NumLanes;
22062 assert((NumLaneElts % 2 == 0) &&
22063 "Vector type should have an even number of elements in each lane");
22064 unsigned HalfLaneElts = NumLaneElts/2;
22066 // View LHS in the form
22067 // LHS = VECTOR_SHUFFLE A, B, LMask
22068 // If LHS is not a shuffle then pretend it is the shuffle
22069 // LHS = VECTOR_SHUFFLE LHS, undef, <0, 1, ..., N-1>
22070 // NOTE: in what follows a default initialized SDValue represents an UNDEF of
22073 SmallVector<int, 16> LMask(NumElts);
22074 if (LHS.getOpcode() == ISD::VECTOR_SHUFFLE) {
22075 if (LHS.getOperand(0).getOpcode() != ISD::UNDEF)
22076 A = LHS.getOperand(0);
22077 if (LHS.getOperand(1).getOpcode() != ISD::UNDEF)
22078 B = LHS.getOperand(1);
22079 ArrayRef<int> Mask = cast<ShuffleVectorSDNode>(LHS.getNode())->getMask();
22080 std::copy(Mask.begin(), Mask.end(), LMask.begin());
22082 if (LHS.getOpcode() != ISD::UNDEF)
22084 for (unsigned i = 0; i != NumElts; ++i)
22088 // Likewise, view RHS in the form
22089 // RHS = VECTOR_SHUFFLE C, D, RMask
22091 SmallVector<int, 16> RMask(NumElts);
22092 if (RHS.getOpcode() == ISD::VECTOR_SHUFFLE) {
22093 if (RHS.getOperand(0).getOpcode() != ISD::UNDEF)
22094 C = RHS.getOperand(0);
22095 if (RHS.getOperand(1).getOpcode() != ISD::UNDEF)
22096 D = RHS.getOperand(1);
22097 ArrayRef<int> Mask = cast<ShuffleVectorSDNode>(RHS.getNode())->getMask();
22098 std::copy(Mask.begin(), Mask.end(), RMask.begin());
22100 if (RHS.getOpcode() != ISD::UNDEF)
22102 for (unsigned i = 0; i != NumElts; ++i)
22106 // Check that the shuffles are both shuffling the same vectors.
22107 if (!(A == C && B == D) && !(A == D && B == C))
22110 // If everything is UNDEF then bail out: it would be better to fold to UNDEF.
22111 if (!A.getNode() && !B.getNode())
22114 // If A and B occur in reverse order in RHS, then "swap" them (which means
22115 // rewriting the mask).
22117 CommuteVectorShuffleMask(RMask, NumElts);
22119 // At this point LHS and RHS are equivalent to
22120 // LHS = VECTOR_SHUFFLE A, B, LMask
22121 // RHS = VECTOR_SHUFFLE A, B, RMask
22122 // Check that the masks correspond to performing a horizontal operation.
22123 for (unsigned l = 0; l != NumElts; l += NumLaneElts) {
22124 for (unsigned i = 0; i != NumLaneElts; ++i) {
22125 int LIdx = LMask[i+l], RIdx = RMask[i+l];
22127 // Ignore any UNDEF components.
22128 if (LIdx < 0 || RIdx < 0 ||
22129 (!A.getNode() && (LIdx < (int)NumElts || RIdx < (int)NumElts)) ||
22130 (!B.getNode() && (LIdx >= (int)NumElts || RIdx >= (int)NumElts)))
22133 // Check that successive elements are being operated on. If not, this is
22134 // not a horizontal operation.
22135 unsigned Src = (i/HalfLaneElts); // each lane is split between srcs
22136 int Index = 2*(i%HalfLaneElts) + NumElts*Src + l;
22137 if (!(LIdx == Index && RIdx == Index + 1) &&
22138 !(IsCommutative && LIdx == Index + 1 && RIdx == Index))
22143 LHS = A.getNode() ? A : B; // If A is 'UNDEF', use B for it.
22144 RHS = B.getNode() ? B : A; // If B is 'UNDEF', use A for it.
22148 /// PerformFADDCombine - Do target-specific dag combines on floating point adds.
22149 static SDValue PerformFADDCombine(SDNode *N, SelectionDAG &DAG,
22150 const X86Subtarget *Subtarget) {
22151 EVT VT = N->getValueType(0);
22152 SDValue LHS = N->getOperand(0);
22153 SDValue RHS = N->getOperand(1);
22155 // Try to synthesize horizontal adds from adds of shuffles.
22156 if (((Subtarget->hasSSE3() && (VT == MVT::v4f32 || VT == MVT::v2f64)) ||
22157 (Subtarget->hasFp256() && (VT == MVT::v8f32 || VT == MVT::v4f64))) &&
22158 isHorizontalBinOp(LHS, RHS, true))
22159 return DAG.getNode(X86ISD::FHADD, SDLoc(N), VT, LHS, RHS);
22163 /// PerformFSUBCombine - Do target-specific dag combines on floating point subs.
22164 static SDValue PerformFSUBCombine(SDNode *N, SelectionDAG &DAG,
22165 const X86Subtarget *Subtarget) {
22166 EVT VT = N->getValueType(0);
22167 SDValue LHS = N->getOperand(0);
22168 SDValue RHS = N->getOperand(1);
22170 // Try to synthesize horizontal subs from subs of shuffles.
22171 if (((Subtarget->hasSSE3() && (VT == MVT::v4f32 || VT == MVT::v2f64)) ||
22172 (Subtarget->hasFp256() && (VT == MVT::v8f32 || VT == MVT::v4f64))) &&
22173 isHorizontalBinOp(LHS, RHS, false))
22174 return DAG.getNode(X86ISD::FHSUB, SDLoc(N), VT, LHS, RHS);
22178 /// PerformFORCombine - Do target-specific dag combines on X86ISD::FOR and
22179 /// X86ISD::FXOR nodes.
22180 static SDValue PerformFORCombine(SDNode *N, SelectionDAG &DAG) {
22181 assert(N->getOpcode() == X86ISD::FOR || N->getOpcode() == X86ISD::FXOR);
22182 // F[X]OR(0.0, x) -> x
22183 // F[X]OR(x, 0.0) -> x
22184 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
22185 if (C->getValueAPF().isPosZero())
22186 return N->getOperand(1);
22187 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
22188 if (C->getValueAPF().isPosZero())
22189 return N->getOperand(0);
22193 /// PerformFMinFMaxCombine - Do target-specific dag combines on X86ISD::FMIN and
22194 /// X86ISD::FMAX nodes.
22195 static SDValue PerformFMinFMaxCombine(SDNode *N, SelectionDAG &DAG) {
22196 assert(N->getOpcode() == X86ISD::FMIN || N->getOpcode() == X86ISD::FMAX);
22198 // Only perform optimizations if UnsafeMath is used.
22199 if (!DAG.getTarget().Options.UnsafeFPMath)
22202 // If we run in unsafe-math mode, then convert the FMAX and FMIN nodes
22203 // into FMINC and FMAXC, which are Commutative operations.
22204 unsigned NewOp = 0;
22205 switch (N->getOpcode()) {
22206 default: llvm_unreachable("unknown opcode");
22207 case X86ISD::FMIN: NewOp = X86ISD::FMINC; break;
22208 case X86ISD::FMAX: NewOp = X86ISD::FMAXC; break;
22211 return DAG.getNode(NewOp, SDLoc(N), N->getValueType(0),
22212 N->getOperand(0), N->getOperand(1));
22215 /// PerformFANDCombine - Do target-specific dag combines on X86ISD::FAND nodes.
22216 static SDValue PerformFANDCombine(SDNode *N, SelectionDAG &DAG) {
22217 // FAND(0.0, x) -> 0.0
22218 // FAND(x, 0.0) -> 0.0
22219 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
22220 if (C->getValueAPF().isPosZero())
22221 return N->getOperand(0);
22222 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
22223 if (C->getValueAPF().isPosZero())
22224 return N->getOperand(1);
22228 /// PerformFANDNCombine - Do target-specific dag combines on X86ISD::FANDN nodes
22229 static SDValue PerformFANDNCombine(SDNode *N, SelectionDAG &DAG) {
22230 // FANDN(x, 0.0) -> 0.0
22231 // FANDN(0.0, x) -> x
22232 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
22233 if (C->getValueAPF().isPosZero())
22234 return N->getOperand(1);
22235 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
22236 if (C->getValueAPF().isPosZero())
22237 return N->getOperand(1);
22241 static SDValue PerformBTCombine(SDNode *N,
22243 TargetLowering::DAGCombinerInfo &DCI) {
22244 // BT ignores high bits in the bit index operand.
22245 SDValue Op1 = N->getOperand(1);
22246 if (Op1.hasOneUse()) {
22247 unsigned BitWidth = Op1.getValueSizeInBits();
22248 APInt DemandedMask = APInt::getLowBitsSet(BitWidth, Log2_32(BitWidth));
22249 APInt KnownZero, KnownOne;
22250 TargetLowering::TargetLoweringOpt TLO(DAG, !DCI.isBeforeLegalize(),
22251 !DCI.isBeforeLegalizeOps());
22252 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
22253 if (TLO.ShrinkDemandedConstant(Op1, DemandedMask) ||
22254 TLI.SimplifyDemandedBits(Op1, DemandedMask, KnownZero, KnownOne, TLO))
22255 DCI.CommitTargetLoweringOpt(TLO);
22260 static SDValue PerformVZEXT_MOVLCombine(SDNode *N, SelectionDAG &DAG) {
22261 SDValue Op = N->getOperand(0);
22262 if (Op.getOpcode() == ISD::BITCAST)
22263 Op = Op.getOperand(0);
22264 EVT VT = N->getValueType(0), OpVT = Op.getValueType();
22265 if (Op.getOpcode() == X86ISD::VZEXT_LOAD &&
22266 VT.getVectorElementType().getSizeInBits() ==
22267 OpVT.getVectorElementType().getSizeInBits()) {
22268 return DAG.getNode(ISD::BITCAST, SDLoc(N), VT, Op);
22273 static SDValue PerformSIGN_EXTEND_INREGCombine(SDNode *N, SelectionDAG &DAG,
22274 const X86Subtarget *Subtarget) {
22275 EVT VT = N->getValueType(0);
22276 if (!VT.isVector())
22279 SDValue N0 = N->getOperand(0);
22280 SDValue N1 = N->getOperand(1);
22281 EVT ExtraVT = cast<VTSDNode>(N1)->getVT();
22284 // The SIGN_EXTEND_INREG to v4i64 is expensive operation on the
22285 // both SSE and AVX2 since there is no sign-extended shift right
22286 // operation on a vector with 64-bit elements.
22287 //(sext_in_reg (v4i64 anyext (v4i32 x )), ExtraVT) ->
22288 // (v4i64 sext (v4i32 sext_in_reg (v4i32 x , ExtraVT)))
22289 if (VT == MVT::v4i64 && (N0.getOpcode() == ISD::ANY_EXTEND ||
22290 N0.getOpcode() == ISD::SIGN_EXTEND)) {
22291 SDValue N00 = N0.getOperand(0);
22293 // EXTLOAD has a better solution on AVX2,
22294 // it may be replaced with X86ISD::VSEXT node.
22295 if (N00.getOpcode() == ISD::LOAD && Subtarget->hasInt256())
22296 if (!ISD::isNormalLoad(N00.getNode()))
22299 if (N00.getValueType() == MVT::v4i32 && ExtraVT.getSizeInBits() < 128) {
22300 SDValue Tmp = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, MVT::v4i32,
22302 return DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i64, Tmp);
22308 static SDValue PerformSExtCombine(SDNode *N, SelectionDAG &DAG,
22309 TargetLowering::DAGCombinerInfo &DCI,
22310 const X86Subtarget *Subtarget) {
22311 if (!DCI.isBeforeLegalizeOps())
22314 if (!Subtarget->hasFp256())
22317 EVT VT = N->getValueType(0);
22318 if (VT.isVector() && VT.getSizeInBits() == 256) {
22319 SDValue R = WidenMaskArithmetic(N, DAG, DCI, Subtarget);
22327 static SDValue PerformFMACombine(SDNode *N, SelectionDAG &DAG,
22328 const X86Subtarget* Subtarget) {
22330 EVT VT = N->getValueType(0);
22332 // Let legalize expand this if it isn't a legal type yet.
22333 if (!DAG.getTargetLoweringInfo().isTypeLegal(VT))
22336 EVT ScalarVT = VT.getScalarType();
22337 if ((ScalarVT != MVT::f32 && ScalarVT != MVT::f64) ||
22338 (!Subtarget->hasFMA() && !Subtarget->hasFMA4()))
22341 SDValue A = N->getOperand(0);
22342 SDValue B = N->getOperand(1);
22343 SDValue C = N->getOperand(2);
22345 bool NegA = (A.getOpcode() == ISD::FNEG);
22346 bool NegB = (B.getOpcode() == ISD::FNEG);
22347 bool NegC = (C.getOpcode() == ISD::FNEG);
22349 // Negative multiplication when NegA xor NegB
22350 bool NegMul = (NegA != NegB);
22352 A = A.getOperand(0);
22354 B = B.getOperand(0);
22356 C = C.getOperand(0);
22360 Opcode = (!NegC) ? X86ISD::FMADD : X86ISD::FMSUB;
22362 Opcode = (!NegC) ? X86ISD::FNMADD : X86ISD::FNMSUB;
22364 return DAG.getNode(Opcode, dl, VT, A, B, C);
22367 static SDValue PerformZExtCombine(SDNode *N, SelectionDAG &DAG,
22368 TargetLowering::DAGCombinerInfo &DCI,
22369 const X86Subtarget *Subtarget) {
22370 // (i32 zext (and (i8 x86isd::setcc_carry), 1)) ->
22371 // (and (i32 x86isd::setcc_carry), 1)
22372 // This eliminates the zext. This transformation is necessary because
22373 // ISD::SETCC is always legalized to i8.
22375 SDValue N0 = N->getOperand(0);
22376 EVT VT = N->getValueType(0);
22378 if (N0.getOpcode() == ISD::AND &&
22380 N0.getOperand(0).hasOneUse()) {
22381 SDValue N00 = N0.getOperand(0);
22382 if (N00.getOpcode() == X86ISD::SETCC_CARRY) {
22383 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N0.getOperand(1));
22384 if (!C || C->getZExtValue() != 1)
22386 return DAG.getNode(ISD::AND, dl, VT,
22387 DAG.getNode(X86ISD::SETCC_CARRY, dl, VT,
22388 N00.getOperand(0), N00.getOperand(1)),
22389 DAG.getConstant(1, VT));
22393 if (N0.getOpcode() == ISD::TRUNCATE &&
22395 N0.getOperand(0).hasOneUse()) {
22396 SDValue N00 = N0.getOperand(0);
22397 if (N00.getOpcode() == X86ISD::SETCC_CARRY) {
22398 return DAG.getNode(ISD::AND, dl, VT,
22399 DAG.getNode(X86ISD::SETCC_CARRY, dl, VT,
22400 N00.getOperand(0), N00.getOperand(1)),
22401 DAG.getConstant(1, VT));
22404 if (VT.is256BitVector()) {
22405 SDValue R = WidenMaskArithmetic(N, DAG, DCI, Subtarget);
22413 // Optimize x == -y --> x+y == 0
22414 // x != -y --> x+y != 0
22415 static SDValue PerformISDSETCCCombine(SDNode *N, SelectionDAG &DAG,
22416 const X86Subtarget* Subtarget) {
22417 ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(2))->get();
22418 SDValue LHS = N->getOperand(0);
22419 SDValue RHS = N->getOperand(1);
22420 EVT VT = N->getValueType(0);
22423 if ((CC == ISD::SETNE || CC == ISD::SETEQ) && LHS.getOpcode() == ISD::SUB)
22424 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(LHS.getOperand(0)))
22425 if (C->getAPIntValue() == 0 && LHS.hasOneUse()) {
22426 SDValue addV = DAG.getNode(ISD::ADD, SDLoc(N),
22427 LHS.getValueType(), RHS, LHS.getOperand(1));
22428 return DAG.getSetCC(SDLoc(N), N->getValueType(0),
22429 addV, DAG.getConstant(0, addV.getValueType()), CC);
22431 if ((CC == ISD::SETNE || CC == ISD::SETEQ) && RHS.getOpcode() == ISD::SUB)
22432 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS.getOperand(0)))
22433 if (C->getAPIntValue() == 0 && RHS.hasOneUse()) {
22434 SDValue addV = DAG.getNode(ISD::ADD, SDLoc(N),
22435 RHS.getValueType(), LHS, RHS.getOperand(1));
22436 return DAG.getSetCC(SDLoc(N), N->getValueType(0),
22437 addV, DAG.getConstant(0, addV.getValueType()), CC);
22440 if (VT.getScalarType() == MVT::i1) {
22441 bool IsSEXT0 = (LHS.getOpcode() == ISD::SIGN_EXTEND) &&
22442 (LHS.getOperand(0).getValueType().getScalarType() == MVT::i1);
22443 bool IsVZero0 = ISD::isBuildVectorAllZeros(LHS.getNode());
22444 if (!IsSEXT0 && !IsVZero0)
22446 bool IsSEXT1 = (RHS.getOpcode() == ISD::SIGN_EXTEND) &&
22447 (RHS.getOperand(0).getValueType().getScalarType() == MVT::i1);
22448 bool IsVZero1 = ISD::isBuildVectorAllZeros(RHS.getNode());
22450 if (!IsSEXT1 && !IsVZero1)
22453 if (IsSEXT0 && IsVZero1) {
22454 assert(VT == LHS.getOperand(0).getValueType() && "Uexpected operand type");
22455 if (CC == ISD::SETEQ)
22456 return DAG.getNOT(DL, LHS.getOperand(0), VT);
22457 return LHS.getOperand(0);
22459 if (IsSEXT1 && IsVZero0) {
22460 assert(VT == RHS.getOperand(0).getValueType() && "Uexpected operand type");
22461 if (CC == ISD::SETEQ)
22462 return DAG.getNOT(DL, RHS.getOperand(0), VT);
22463 return RHS.getOperand(0);
22470 static SDValue PerformINSERTPSCombine(SDNode *N, SelectionDAG &DAG,
22471 const X86Subtarget *Subtarget) {
22473 MVT VT = N->getOperand(1)->getSimpleValueType(0);
22474 assert((VT == MVT::v4f32 || VT == MVT::v4i32) &&
22475 "X86insertps is only defined for v4x32");
22477 SDValue Ld = N->getOperand(1);
22478 if (MayFoldLoad(Ld)) {
22479 // Extract the countS bits from the immediate so we can get the proper
22480 // address when narrowing the vector load to a specific element.
22481 // When the second source op is a memory address, interps doesn't use
22482 // countS and just gets an f32 from that address.
22483 unsigned DestIndex =
22484 cast<ConstantSDNode>(N->getOperand(2))->getZExtValue() >> 6;
22485 Ld = NarrowVectorLoadToElement(cast<LoadSDNode>(Ld), DestIndex, DAG);
22489 // Create this as a scalar to vector to match the instruction pattern.
22490 SDValue LoadScalarToVector = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Ld);
22491 // countS bits are ignored when loading from memory on insertps, which
22492 // means we don't need to explicitly set them to 0.
22493 return DAG.getNode(X86ISD::INSERTPS, dl, VT, N->getOperand(0),
22494 LoadScalarToVector, N->getOperand(2));
22497 // Helper function of PerformSETCCCombine. It is to materialize "setb reg"
22498 // as "sbb reg,reg", since it can be extended without zext and produces
22499 // an all-ones bit which is more useful than 0/1 in some cases.
22500 static SDValue MaterializeSETB(SDLoc DL, SDValue EFLAGS, SelectionDAG &DAG,
22503 return DAG.getNode(ISD::AND, DL, VT,
22504 DAG.getNode(X86ISD::SETCC_CARRY, DL, MVT::i8,
22505 DAG.getConstant(X86::COND_B, MVT::i8), EFLAGS),
22506 DAG.getConstant(1, VT));
22507 assert (VT == MVT::i1 && "Unexpected type for SECCC node");
22508 return DAG.getNode(ISD::TRUNCATE, DL, MVT::i1,
22509 DAG.getNode(X86ISD::SETCC_CARRY, DL, MVT::i8,
22510 DAG.getConstant(X86::COND_B, MVT::i8), EFLAGS));
22513 // Optimize RES = X86ISD::SETCC CONDCODE, EFLAG_INPUT
22514 static SDValue PerformSETCCCombine(SDNode *N, SelectionDAG &DAG,
22515 TargetLowering::DAGCombinerInfo &DCI,
22516 const X86Subtarget *Subtarget) {
22518 X86::CondCode CC = X86::CondCode(N->getConstantOperandVal(0));
22519 SDValue EFLAGS = N->getOperand(1);
22521 if (CC == X86::COND_A) {
22522 // Try to convert COND_A into COND_B in an attempt to facilitate
22523 // materializing "setb reg".
22525 // Do not flip "e > c", where "c" is a constant, because Cmp instruction
22526 // cannot take an immediate as its first operand.
22528 if (EFLAGS.getOpcode() == X86ISD::SUB && EFLAGS.hasOneUse() &&
22529 EFLAGS.getValueType().isInteger() &&
22530 !isa<ConstantSDNode>(EFLAGS.getOperand(1))) {
22531 SDValue NewSub = DAG.getNode(X86ISD::SUB, SDLoc(EFLAGS),
22532 EFLAGS.getNode()->getVTList(),
22533 EFLAGS.getOperand(1), EFLAGS.getOperand(0));
22534 SDValue NewEFLAGS = SDValue(NewSub.getNode(), EFLAGS.getResNo());
22535 return MaterializeSETB(DL, NewEFLAGS, DAG, N->getSimpleValueType(0));
22539 // Materialize "setb reg" as "sbb reg,reg", since it can be extended without
22540 // a zext and produces an all-ones bit which is more useful than 0/1 in some
22542 if (CC == X86::COND_B)
22543 return MaterializeSETB(DL, EFLAGS, DAG, N->getSimpleValueType(0));
22547 Flags = checkBoolTestSetCCCombine(EFLAGS, CC);
22548 if (Flags.getNode()) {
22549 SDValue Cond = DAG.getConstant(CC, MVT::i8);
22550 return DAG.getNode(X86ISD::SETCC, DL, N->getVTList(), Cond, Flags);
22556 // Optimize branch condition evaluation.
22558 static SDValue PerformBrCondCombine(SDNode *N, SelectionDAG &DAG,
22559 TargetLowering::DAGCombinerInfo &DCI,
22560 const X86Subtarget *Subtarget) {
22562 SDValue Chain = N->getOperand(0);
22563 SDValue Dest = N->getOperand(1);
22564 SDValue EFLAGS = N->getOperand(3);
22565 X86::CondCode CC = X86::CondCode(N->getConstantOperandVal(2));
22569 Flags = checkBoolTestSetCCCombine(EFLAGS, CC);
22570 if (Flags.getNode()) {
22571 SDValue Cond = DAG.getConstant(CC, MVT::i8);
22572 return DAG.getNode(X86ISD::BRCOND, DL, N->getVTList(), Chain, Dest, Cond,
22579 static SDValue performVectorCompareAndMaskUnaryOpCombine(SDNode *N,
22580 SelectionDAG &DAG) {
22581 // Take advantage of vector comparisons producing 0 or -1 in each lane to
22582 // optimize away operation when it's from a constant.
22584 // The general transformation is:
22585 // UNARYOP(AND(VECTOR_CMP(x,y), constant)) -->
22586 // AND(VECTOR_CMP(x,y), constant2)
22587 // constant2 = UNARYOP(constant)
22589 // Early exit if this isn't a vector operation, the operand of the
22590 // unary operation isn't a bitwise AND, or if the sizes of the operations
22591 // aren't the same.
22592 EVT VT = N->getValueType(0);
22593 if (!VT.isVector() || N->getOperand(0)->getOpcode() != ISD::AND ||
22594 N->getOperand(0)->getOperand(0)->getOpcode() != ISD::SETCC ||
22595 VT.getSizeInBits() != N->getOperand(0)->getValueType(0).getSizeInBits())
22598 // Now check that the other operand of the AND is a constant. We could
22599 // make the transformation for non-constant splats as well, but it's unclear
22600 // that would be a benefit as it would not eliminate any operations, just
22601 // perform one more step in scalar code before moving to the vector unit.
22602 if (BuildVectorSDNode *BV =
22603 dyn_cast<BuildVectorSDNode>(N->getOperand(0)->getOperand(1))) {
22604 // Bail out if the vector isn't a constant.
22605 if (!BV->isConstant())
22608 // Everything checks out. Build up the new and improved node.
22610 EVT IntVT = BV->getValueType(0);
22611 // Create a new constant of the appropriate type for the transformed
22613 SDValue SourceConst = DAG.getNode(N->getOpcode(), DL, VT, SDValue(BV, 0));
22614 // The AND node needs bitcasts to/from an integer vector type around it.
22615 SDValue MaskConst = DAG.getNode(ISD::BITCAST, DL, IntVT, SourceConst);
22616 SDValue NewAnd = DAG.getNode(ISD::AND, DL, IntVT,
22617 N->getOperand(0)->getOperand(0), MaskConst);
22618 SDValue Res = DAG.getNode(ISD::BITCAST, DL, VT, NewAnd);
22625 static SDValue PerformSINT_TO_FPCombine(SDNode *N, SelectionDAG &DAG,
22626 const X86TargetLowering *XTLI) {
22627 // First try to optimize away the conversion entirely when it's
22628 // conditionally from a constant. Vectors only.
22629 SDValue Res = performVectorCompareAndMaskUnaryOpCombine(N, DAG);
22630 if (Res != SDValue())
22633 // Now move on to more general possibilities.
22634 SDValue Op0 = N->getOperand(0);
22635 EVT InVT = Op0->getValueType(0);
22637 // SINT_TO_FP(v4i8) -> SINT_TO_FP(SEXT(v4i8 to v4i32))
22638 if (InVT == MVT::v8i8 || InVT == MVT::v4i8) {
22640 MVT DstVT = InVT == MVT::v4i8 ? MVT::v4i32 : MVT::v8i32;
22641 SDValue P = DAG.getNode(ISD::SIGN_EXTEND, dl, DstVT, Op0);
22642 return DAG.getNode(ISD::SINT_TO_FP, dl, N->getValueType(0), P);
22645 // Transform (SINT_TO_FP (i64 ...)) into an x87 operation if we have
22646 // a 32-bit target where SSE doesn't support i64->FP operations.
22647 if (Op0.getOpcode() == ISD::LOAD) {
22648 LoadSDNode *Ld = cast<LoadSDNode>(Op0.getNode());
22649 EVT VT = Ld->getValueType(0);
22650 if (!Ld->isVolatile() && !N->getValueType(0).isVector() &&
22651 ISD::isNON_EXTLoad(Op0.getNode()) && Op0.hasOneUse() &&
22652 !XTLI->getSubtarget()->is64Bit() &&
22654 SDValue FILDChain = XTLI->BuildFILD(SDValue(N, 0), Ld->getValueType(0),
22655 Ld->getChain(), Op0, DAG);
22656 DAG.ReplaceAllUsesOfValueWith(Op0.getValue(1), FILDChain.getValue(1));
22663 // Optimize RES, EFLAGS = X86ISD::ADC LHS, RHS, EFLAGS
22664 static SDValue PerformADCCombine(SDNode *N, SelectionDAG &DAG,
22665 X86TargetLowering::DAGCombinerInfo &DCI) {
22666 // If the LHS and RHS of the ADC node are zero, then it can't overflow and
22667 // the result is either zero or one (depending on the input carry bit).
22668 // Strength reduce this down to a "set on carry" aka SETCC_CARRY&1.
22669 if (X86::isZeroNode(N->getOperand(0)) &&
22670 X86::isZeroNode(N->getOperand(1)) &&
22671 // We don't have a good way to replace an EFLAGS use, so only do this when
22673 SDValue(N, 1).use_empty()) {
22675 EVT VT = N->getValueType(0);
22676 SDValue CarryOut = DAG.getConstant(0, N->getValueType(1));
22677 SDValue Res1 = DAG.getNode(ISD::AND, DL, VT,
22678 DAG.getNode(X86ISD::SETCC_CARRY, DL, VT,
22679 DAG.getConstant(X86::COND_B,MVT::i8),
22681 DAG.getConstant(1, VT));
22682 return DCI.CombineTo(N, Res1, CarryOut);
22688 // fold (add Y, (sete X, 0)) -> adc 0, Y
22689 // (add Y, (setne X, 0)) -> sbb -1, Y
22690 // (sub (sete X, 0), Y) -> sbb 0, Y
22691 // (sub (setne X, 0), Y) -> adc -1, Y
22692 static SDValue OptimizeConditionalInDecrement(SDNode *N, SelectionDAG &DAG) {
22695 // Look through ZExts.
22696 SDValue Ext = N->getOperand(N->getOpcode() == ISD::SUB ? 1 : 0);
22697 if (Ext.getOpcode() != ISD::ZERO_EXTEND || !Ext.hasOneUse())
22700 SDValue SetCC = Ext.getOperand(0);
22701 if (SetCC.getOpcode() != X86ISD::SETCC || !SetCC.hasOneUse())
22704 X86::CondCode CC = (X86::CondCode)SetCC.getConstantOperandVal(0);
22705 if (CC != X86::COND_E && CC != X86::COND_NE)
22708 SDValue Cmp = SetCC.getOperand(1);
22709 if (Cmp.getOpcode() != X86ISD::CMP || !Cmp.hasOneUse() ||
22710 !X86::isZeroNode(Cmp.getOperand(1)) ||
22711 !Cmp.getOperand(0).getValueType().isInteger())
22714 SDValue CmpOp0 = Cmp.getOperand(0);
22715 SDValue NewCmp = DAG.getNode(X86ISD::CMP, DL, MVT::i32, CmpOp0,
22716 DAG.getConstant(1, CmpOp0.getValueType()));
22718 SDValue OtherVal = N->getOperand(N->getOpcode() == ISD::SUB ? 0 : 1);
22719 if (CC == X86::COND_NE)
22720 return DAG.getNode(N->getOpcode() == ISD::SUB ? X86ISD::ADC : X86ISD::SBB,
22721 DL, OtherVal.getValueType(), OtherVal,
22722 DAG.getConstant(-1ULL, OtherVal.getValueType()), NewCmp);
22723 return DAG.getNode(N->getOpcode() == ISD::SUB ? X86ISD::SBB : X86ISD::ADC,
22724 DL, OtherVal.getValueType(), OtherVal,
22725 DAG.getConstant(0, OtherVal.getValueType()), NewCmp);
22728 /// PerformADDCombine - Do target-specific dag combines on integer adds.
22729 static SDValue PerformAddCombine(SDNode *N, SelectionDAG &DAG,
22730 const X86Subtarget *Subtarget) {
22731 EVT VT = N->getValueType(0);
22732 SDValue Op0 = N->getOperand(0);
22733 SDValue Op1 = N->getOperand(1);
22735 // Try to synthesize horizontal adds from adds of shuffles.
22736 if (((Subtarget->hasSSSE3() && (VT == MVT::v8i16 || VT == MVT::v4i32)) ||
22737 (Subtarget->hasInt256() && (VT == MVT::v16i16 || VT == MVT::v8i32))) &&
22738 isHorizontalBinOp(Op0, Op1, true))
22739 return DAG.getNode(X86ISD::HADD, SDLoc(N), VT, Op0, Op1);
22741 return OptimizeConditionalInDecrement(N, DAG);
22744 static SDValue PerformSubCombine(SDNode *N, SelectionDAG &DAG,
22745 const X86Subtarget *Subtarget) {
22746 SDValue Op0 = N->getOperand(0);
22747 SDValue Op1 = N->getOperand(1);
22749 // X86 can't encode an immediate LHS of a sub. See if we can push the
22750 // negation into a preceding instruction.
22751 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op0)) {
22752 // If the RHS of the sub is a XOR with one use and a constant, invert the
22753 // immediate. Then add one to the LHS of the sub so we can turn
22754 // X-Y -> X+~Y+1, saving one register.
22755 if (Op1->hasOneUse() && Op1.getOpcode() == ISD::XOR &&
22756 isa<ConstantSDNode>(Op1.getOperand(1))) {
22757 APInt XorC = cast<ConstantSDNode>(Op1.getOperand(1))->getAPIntValue();
22758 EVT VT = Op0.getValueType();
22759 SDValue NewXor = DAG.getNode(ISD::XOR, SDLoc(Op1), VT,
22761 DAG.getConstant(~XorC, VT));
22762 return DAG.getNode(ISD::ADD, SDLoc(N), VT, NewXor,
22763 DAG.getConstant(C->getAPIntValue()+1, VT));
22767 // Try to synthesize horizontal adds from adds of shuffles.
22768 EVT VT = N->getValueType(0);
22769 if (((Subtarget->hasSSSE3() && (VT == MVT::v8i16 || VT == MVT::v4i32)) ||
22770 (Subtarget->hasInt256() && (VT == MVT::v16i16 || VT == MVT::v8i32))) &&
22771 isHorizontalBinOp(Op0, Op1, true))
22772 return DAG.getNode(X86ISD::HSUB, SDLoc(N), VT, Op0, Op1);
22774 return OptimizeConditionalInDecrement(N, DAG);
22777 /// performVZEXTCombine - Performs build vector combines
22778 static SDValue performVZEXTCombine(SDNode *N, SelectionDAG &DAG,
22779 TargetLowering::DAGCombinerInfo &DCI,
22780 const X86Subtarget *Subtarget) {
22781 // (vzext (bitcast (vzext (x)) -> (vzext x)
22782 SDValue In = N->getOperand(0);
22783 while (In.getOpcode() == ISD::BITCAST)
22784 In = In.getOperand(0);
22786 if (In.getOpcode() != X86ISD::VZEXT)
22789 return DAG.getNode(X86ISD::VZEXT, SDLoc(N), N->getValueType(0),
22793 SDValue X86TargetLowering::PerformDAGCombine(SDNode *N,
22794 DAGCombinerInfo &DCI) const {
22795 SelectionDAG &DAG = DCI.DAG;
22796 switch (N->getOpcode()) {
22798 case ISD::EXTRACT_VECTOR_ELT:
22799 return PerformEXTRACT_VECTOR_ELTCombine(N, DAG, DCI);
22801 case ISD::SELECT: return PerformSELECTCombine(N, DAG, DCI, Subtarget);
22802 case X86ISD::CMOV: return PerformCMOVCombine(N, DAG, DCI, Subtarget);
22803 case ISD::ADD: return PerformAddCombine(N, DAG, Subtarget);
22804 case ISD::SUB: return PerformSubCombine(N, DAG, Subtarget);
22805 case X86ISD::ADC: return PerformADCCombine(N, DAG, DCI);
22806 case ISD::MUL: return PerformMulCombine(N, DAG, DCI);
22809 case ISD::SRL: return PerformShiftCombine(N, DAG, DCI, Subtarget);
22810 case ISD::AND: return PerformAndCombine(N, DAG, DCI, Subtarget);
22811 case ISD::OR: return PerformOrCombine(N, DAG, DCI, Subtarget);
22812 case ISD::XOR: return PerformXorCombine(N, DAG, DCI, Subtarget);
22813 case ISD::LOAD: return PerformLOADCombine(N, DAG, DCI, Subtarget);
22814 case ISD::STORE: return PerformSTORECombine(N, DAG, Subtarget);
22815 case ISD::SINT_TO_FP: return PerformSINT_TO_FPCombine(N, DAG, this);
22816 case ISD::FADD: return PerformFADDCombine(N, DAG, Subtarget);
22817 case ISD::FSUB: return PerformFSUBCombine(N, DAG, Subtarget);
22819 case X86ISD::FOR: return PerformFORCombine(N, DAG);
22821 case X86ISD::FMAX: return PerformFMinFMaxCombine(N, DAG);
22822 case X86ISD::FAND: return PerformFANDCombine(N, DAG);
22823 case X86ISD::FANDN: return PerformFANDNCombine(N, DAG);
22824 case X86ISD::BT: return PerformBTCombine(N, DAG, DCI);
22825 case X86ISD::VZEXT_MOVL: return PerformVZEXT_MOVLCombine(N, DAG);
22826 case ISD::ANY_EXTEND:
22827 case ISD::ZERO_EXTEND: return PerformZExtCombine(N, DAG, DCI, Subtarget);
22828 case ISD::SIGN_EXTEND: return PerformSExtCombine(N, DAG, DCI, Subtarget);
22829 case ISD::SIGN_EXTEND_INREG:
22830 return PerformSIGN_EXTEND_INREGCombine(N, DAG, Subtarget);
22831 case ISD::TRUNCATE: return PerformTruncateCombine(N, DAG,DCI,Subtarget);
22832 case ISD::SETCC: return PerformISDSETCCCombine(N, DAG, Subtarget);
22833 case X86ISD::SETCC: return PerformSETCCCombine(N, DAG, DCI, Subtarget);
22834 case X86ISD::BRCOND: return PerformBrCondCombine(N, DAG, DCI, Subtarget);
22835 case X86ISD::VZEXT: return performVZEXTCombine(N, DAG, DCI, Subtarget);
22836 case X86ISD::SHUFP: // Handle all target specific shuffles
22837 case X86ISD::PALIGNR:
22838 case X86ISD::UNPCKH:
22839 case X86ISD::UNPCKL:
22840 case X86ISD::MOVHLPS:
22841 case X86ISD::MOVLHPS:
22842 case X86ISD::PSHUFB:
22843 case X86ISD::PSHUFD:
22844 case X86ISD::PSHUFHW:
22845 case X86ISD::PSHUFLW:
22846 case X86ISD::MOVSS:
22847 case X86ISD::MOVSD:
22848 case X86ISD::VPERMILP:
22849 case X86ISD::VPERM2X128:
22850 case ISD::VECTOR_SHUFFLE: return PerformShuffleCombine(N, DAG, DCI,Subtarget);
22851 case ISD::FMA: return PerformFMACombine(N, DAG, Subtarget);
22852 case ISD::INTRINSIC_WO_CHAIN:
22853 return PerformINTRINSIC_WO_CHAINCombine(N, DAG, Subtarget);
22854 case X86ISD::INSERTPS:
22855 return PerformINSERTPSCombine(N, DAG, Subtarget);
22856 case ISD::BUILD_VECTOR: return PerformBUILD_VECTORCombine(N, DAG, Subtarget);
22862 /// isTypeDesirableForOp - Return true if the target has native support for
22863 /// the specified value type and it is 'desirable' to use the type for the
22864 /// given node type. e.g. On x86 i16 is legal, but undesirable since i16
22865 /// instruction encodings are longer and some i16 instructions are slow.
22866 bool X86TargetLowering::isTypeDesirableForOp(unsigned Opc, EVT VT) const {
22867 if (!isTypeLegal(VT))
22869 if (VT != MVT::i16)
22876 case ISD::SIGN_EXTEND:
22877 case ISD::ZERO_EXTEND:
22878 case ISD::ANY_EXTEND:
22891 /// IsDesirableToPromoteOp - This method query the target whether it is
22892 /// beneficial for dag combiner to promote the specified node. If true, it
22893 /// should return the desired promotion type by reference.
22894 bool X86TargetLowering::IsDesirableToPromoteOp(SDValue Op, EVT &PVT) const {
22895 EVT VT = Op.getValueType();
22896 if (VT != MVT::i16)
22899 bool Promote = false;
22900 bool Commute = false;
22901 switch (Op.getOpcode()) {
22904 LoadSDNode *LD = cast<LoadSDNode>(Op);
22905 // If the non-extending load has a single use and it's not live out, then it
22906 // might be folded.
22907 if (LD->getExtensionType() == ISD::NON_EXTLOAD /*&&
22908 Op.hasOneUse()*/) {
22909 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
22910 UE = Op.getNode()->use_end(); UI != UE; ++UI) {
22911 // The only case where we'd want to promote LOAD (rather then it being
22912 // promoted as an operand is when it's only use is liveout.
22913 if (UI->getOpcode() != ISD::CopyToReg)
22920 case ISD::SIGN_EXTEND:
22921 case ISD::ZERO_EXTEND:
22922 case ISD::ANY_EXTEND:
22927 SDValue N0 = Op.getOperand(0);
22928 // Look out for (store (shl (load), x)).
22929 if (MayFoldLoad(N0) && MayFoldIntoStore(Op))
22942 SDValue N0 = Op.getOperand(0);
22943 SDValue N1 = Op.getOperand(1);
22944 if (!Commute && MayFoldLoad(N1))
22946 // Avoid disabling potential load folding opportunities.
22947 if (MayFoldLoad(N0) && (!isa<ConstantSDNode>(N1) || MayFoldIntoStore(Op)))
22949 if (MayFoldLoad(N1) && (!isa<ConstantSDNode>(N0) || MayFoldIntoStore(Op)))
22959 //===----------------------------------------------------------------------===//
22960 // X86 Inline Assembly Support
22961 //===----------------------------------------------------------------------===//
22964 // Helper to match a string separated by whitespace.
22965 bool matchAsmImpl(StringRef s, ArrayRef<const StringRef *> args) {
22966 s = s.substr(s.find_first_not_of(" \t")); // Skip leading whitespace.
22968 for (unsigned i = 0, e = args.size(); i != e; ++i) {
22969 StringRef piece(*args[i]);
22970 if (!s.startswith(piece)) // Check if the piece matches.
22973 s = s.substr(piece.size());
22974 StringRef::size_type pos = s.find_first_not_of(" \t");
22975 if (pos == 0) // We matched a prefix.
22983 const VariadicFunction1<bool, StringRef, StringRef, matchAsmImpl> matchAsm={};
22986 static bool clobbersFlagRegisters(const SmallVector<StringRef, 4> &AsmPieces) {
22988 if (AsmPieces.size() == 3 || AsmPieces.size() == 4) {
22989 if (std::count(AsmPieces.begin(), AsmPieces.end(), "~{cc}") &&
22990 std::count(AsmPieces.begin(), AsmPieces.end(), "~{flags}") &&
22991 std::count(AsmPieces.begin(), AsmPieces.end(), "~{fpsr}")) {
22993 if (AsmPieces.size() == 3)
22995 else if (std::count(AsmPieces.begin(), AsmPieces.end(), "~{dirflag}"))
23002 bool X86TargetLowering::ExpandInlineAsm(CallInst *CI) const {
23003 InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
23005 std::string AsmStr = IA->getAsmString();
23007 IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
23008 if (!Ty || Ty->getBitWidth() % 16 != 0)
23011 // TODO: should remove alternatives from the asmstring: "foo {a|b}" -> "foo a"
23012 SmallVector<StringRef, 4> AsmPieces;
23013 SplitString(AsmStr, AsmPieces, ";\n");
23015 switch (AsmPieces.size()) {
23016 default: return false;
23018 // FIXME: this should verify that we are targeting a 486 or better. If not,
23019 // we will turn this bswap into something that will be lowered to logical
23020 // ops instead of emitting the bswap asm. For now, we don't support 486 or
23021 // lower so don't worry about this.
23023 if (matchAsm(AsmPieces[0], "bswap", "$0") ||
23024 matchAsm(AsmPieces[0], "bswapl", "$0") ||
23025 matchAsm(AsmPieces[0], "bswapq", "$0") ||
23026 matchAsm(AsmPieces[0], "bswap", "${0:q}") ||
23027 matchAsm(AsmPieces[0], "bswapl", "${0:q}") ||
23028 matchAsm(AsmPieces[0], "bswapq", "${0:q}")) {
23029 // No need to check constraints, nothing other than the equivalent of
23030 // "=r,0" would be valid here.
23031 return IntrinsicLowering::LowerToByteSwap(CI);
23034 // rorw $$8, ${0:w} --> llvm.bswap.i16
23035 if (CI->getType()->isIntegerTy(16) &&
23036 IA->getConstraintString().compare(0, 5, "=r,0,") == 0 &&
23037 (matchAsm(AsmPieces[0], "rorw", "$$8,", "${0:w}") ||
23038 matchAsm(AsmPieces[0], "rolw", "$$8,", "${0:w}"))) {
23040 const std::string &ConstraintsStr = IA->getConstraintString();
23041 SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ",");
23042 array_pod_sort(AsmPieces.begin(), AsmPieces.end());
23043 if (clobbersFlagRegisters(AsmPieces))
23044 return IntrinsicLowering::LowerToByteSwap(CI);
23048 if (CI->getType()->isIntegerTy(32) &&
23049 IA->getConstraintString().compare(0, 5, "=r,0,") == 0 &&
23050 matchAsm(AsmPieces[0], "rorw", "$$8,", "${0:w}") &&
23051 matchAsm(AsmPieces[1], "rorl", "$$16,", "$0") &&
23052 matchAsm(AsmPieces[2], "rorw", "$$8,", "${0:w}")) {
23054 const std::string &ConstraintsStr = IA->getConstraintString();
23055 SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ",");
23056 array_pod_sort(AsmPieces.begin(), AsmPieces.end());
23057 if (clobbersFlagRegisters(AsmPieces))
23058 return IntrinsicLowering::LowerToByteSwap(CI);
23061 if (CI->getType()->isIntegerTy(64)) {
23062 InlineAsm::ConstraintInfoVector Constraints = IA->ParseConstraints();
23063 if (Constraints.size() >= 2 &&
23064 Constraints[0].Codes.size() == 1 && Constraints[0].Codes[0] == "A" &&
23065 Constraints[1].Codes.size() == 1 && Constraints[1].Codes[0] == "0") {
23066 // bswap %eax / bswap %edx / xchgl %eax, %edx -> llvm.bswap.i64
23067 if (matchAsm(AsmPieces[0], "bswap", "%eax") &&
23068 matchAsm(AsmPieces[1], "bswap", "%edx") &&
23069 matchAsm(AsmPieces[2], "xchgl", "%eax,", "%edx"))
23070 return IntrinsicLowering::LowerToByteSwap(CI);
23078 /// getConstraintType - Given a constraint letter, return the type of
23079 /// constraint it is for this target.
23080 X86TargetLowering::ConstraintType
23081 X86TargetLowering::getConstraintType(const std::string &Constraint) const {
23082 if (Constraint.size() == 1) {
23083 switch (Constraint[0]) {
23094 return C_RegisterClass;
23118 return TargetLowering::getConstraintType(Constraint);
23121 /// Examine constraint type and operand type and determine a weight value.
23122 /// This object must already have been set up with the operand type
23123 /// and the current alternative constraint selected.
23124 TargetLowering::ConstraintWeight
23125 X86TargetLowering::getSingleConstraintMatchWeight(
23126 AsmOperandInfo &info, const char *constraint) const {
23127 ConstraintWeight weight = CW_Invalid;
23128 Value *CallOperandVal = info.CallOperandVal;
23129 // If we don't have a value, we can't do a match,
23130 // but allow it at the lowest weight.
23131 if (!CallOperandVal)
23133 Type *type = CallOperandVal->getType();
23134 // Look at the constraint type.
23135 switch (*constraint) {
23137 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
23148 if (CallOperandVal->getType()->isIntegerTy())
23149 weight = CW_SpecificReg;
23154 if (type->isFloatingPointTy())
23155 weight = CW_SpecificReg;
23158 if (type->isX86_MMXTy() && Subtarget->hasMMX())
23159 weight = CW_SpecificReg;
23163 if (((type->getPrimitiveSizeInBits() == 128) && Subtarget->hasSSE1()) ||
23164 ((type->getPrimitiveSizeInBits() == 256) && Subtarget->hasFp256()))
23165 weight = CW_Register;
23168 if (ConstantInt *C = dyn_cast<ConstantInt>(info.CallOperandVal)) {
23169 if (C->getZExtValue() <= 31)
23170 weight = CW_Constant;
23174 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
23175 if (C->getZExtValue() <= 63)
23176 weight = CW_Constant;
23180 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
23181 if ((C->getSExtValue() >= -0x80) && (C->getSExtValue() <= 0x7f))
23182 weight = CW_Constant;
23186 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
23187 if ((C->getZExtValue() == 0xff) || (C->getZExtValue() == 0xffff))
23188 weight = CW_Constant;
23192 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
23193 if (C->getZExtValue() <= 3)
23194 weight = CW_Constant;
23198 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
23199 if (C->getZExtValue() <= 0xff)
23200 weight = CW_Constant;
23205 if (dyn_cast<ConstantFP>(CallOperandVal)) {
23206 weight = CW_Constant;
23210 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
23211 if ((C->getSExtValue() >= -0x80000000LL) &&
23212 (C->getSExtValue() <= 0x7fffffffLL))
23213 weight = CW_Constant;
23217 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
23218 if (C->getZExtValue() <= 0xffffffff)
23219 weight = CW_Constant;
23226 /// LowerXConstraint - try to replace an X constraint, which matches anything,
23227 /// with another that has more specific requirements based on the type of the
23228 /// corresponding operand.
23229 const char *X86TargetLowering::
23230 LowerXConstraint(EVT ConstraintVT) const {
23231 // FP X constraints get lowered to SSE1/2 registers if available, otherwise
23232 // 'f' like normal targets.
23233 if (ConstraintVT.isFloatingPoint()) {
23234 if (Subtarget->hasSSE2())
23236 if (Subtarget->hasSSE1())
23240 return TargetLowering::LowerXConstraint(ConstraintVT);
23243 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
23244 /// vector. If it is invalid, don't add anything to Ops.
23245 void X86TargetLowering::LowerAsmOperandForConstraint(SDValue Op,
23246 std::string &Constraint,
23247 std::vector<SDValue>&Ops,
23248 SelectionDAG &DAG) const {
23251 // Only support length 1 constraints for now.
23252 if (Constraint.length() > 1) return;
23254 char ConstraintLetter = Constraint[0];
23255 switch (ConstraintLetter) {
23258 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
23259 if (C->getZExtValue() <= 31) {
23260 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
23266 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
23267 if (C->getZExtValue() <= 63) {
23268 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
23274 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
23275 if (isInt<8>(C->getSExtValue())) {
23276 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
23282 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
23283 if (C->getZExtValue() <= 255) {
23284 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
23290 // 32-bit signed value
23291 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
23292 if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()),
23293 C->getSExtValue())) {
23294 // Widen to 64 bits here to get it sign extended.
23295 Result = DAG.getTargetConstant(C->getSExtValue(), MVT::i64);
23298 // FIXME gcc accepts some relocatable values here too, but only in certain
23299 // memory models; it's complicated.
23304 // 32-bit unsigned value
23305 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
23306 if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()),
23307 C->getZExtValue())) {
23308 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
23312 // FIXME gcc accepts some relocatable values here too, but only in certain
23313 // memory models; it's complicated.
23317 // Literal immediates are always ok.
23318 if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(Op)) {
23319 // Widen to 64 bits here to get it sign extended.
23320 Result = DAG.getTargetConstant(CST->getSExtValue(), MVT::i64);
23324 // In any sort of PIC mode addresses need to be computed at runtime by
23325 // adding in a register or some sort of table lookup. These can't
23326 // be used as immediates.
23327 if (Subtarget->isPICStyleGOT() || Subtarget->isPICStyleStubPIC())
23330 // If we are in non-pic codegen mode, we allow the address of a global (with
23331 // an optional displacement) to be used with 'i'.
23332 GlobalAddressSDNode *GA = nullptr;
23333 int64_t Offset = 0;
23335 // Match either (GA), (GA+C), (GA+C1+C2), etc.
23337 if ((GA = dyn_cast<GlobalAddressSDNode>(Op))) {
23338 Offset += GA->getOffset();
23340 } else if (Op.getOpcode() == ISD::ADD) {
23341 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
23342 Offset += C->getZExtValue();
23343 Op = Op.getOperand(0);
23346 } else if (Op.getOpcode() == ISD::SUB) {
23347 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
23348 Offset += -C->getZExtValue();
23349 Op = Op.getOperand(0);
23354 // Otherwise, this isn't something we can handle, reject it.
23358 const GlobalValue *GV = GA->getGlobal();
23359 // If we require an extra load to get this address, as in PIC mode, we
23360 // can't accept it.
23361 if (isGlobalStubReference(
23362 Subtarget->ClassifyGlobalReference(GV, DAG.getTarget())))
23365 Result = DAG.getTargetGlobalAddress(GV, SDLoc(Op),
23366 GA->getValueType(0), Offset);
23371 if (Result.getNode()) {
23372 Ops.push_back(Result);
23375 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
23378 std::pair<unsigned, const TargetRegisterClass*>
23379 X86TargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
23381 // First, see if this is a constraint that directly corresponds to an LLVM
23383 if (Constraint.size() == 1) {
23384 // GCC Constraint Letters
23385 switch (Constraint[0]) {
23387 // TODO: Slight differences here in allocation order and leaving
23388 // RIP in the class. Do they matter any more here than they do
23389 // in the normal allocation?
23390 case 'q': // GENERAL_REGS in 64-bit mode, Q_REGS in 32-bit mode.
23391 if (Subtarget->is64Bit()) {
23392 if (VT == MVT::i32 || VT == MVT::f32)
23393 return std::make_pair(0U, &X86::GR32RegClass);
23394 if (VT == MVT::i16)
23395 return std::make_pair(0U, &X86::GR16RegClass);
23396 if (VT == MVT::i8 || VT == MVT::i1)
23397 return std::make_pair(0U, &X86::GR8RegClass);
23398 if (VT == MVT::i64 || VT == MVT::f64)
23399 return std::make_pair(0U, &X86::GR64RegClass);
23402 // 32-bit fallthrough
23403 case 'Q': // Q_REGS
23404 if (VT == MVT::i32 || VT == MVT::f32)
23405 return std::make_pair(0U, &X86::GR32_ABCDRegClass);
23406 if (VT == MVT::i16)
23407 return std::make_pair(0U, &X86::GR16_ABCDRegClass);
23408 if (VT == MVT::i8 || VT == MVT::i1)
23409 return std::make_pair(0U, &X86::GR8_ABCD_LRegClass);
23410 if (VT == MVT::i64)
23411 return std::make_pair(0U, &X86::GR64_ABCDRegClass);
23413 case 'r': // GENERAL_REGS
23414 case 'l': // INDEX_REGS
23415 if (VT == MVT::i8 || VT == MVT::i1)
23416 return std::make_pair(0U, &X86::GR8RegClass);
23417 if (VT == MVT::i16)
23418 return std::make_pair(0U, &X86::GR16RegClass);
23419 if (VT == MVT::i32 || VT == MVT::f32 || !Subtarget->is64Bit())
23420 return std::make_pair(0U, &X86::GR32RegClass);
23421 return std::make_pair(0U, &X86::GR64RegClass);
23422 case 'R': // LEGACY_REGS
23423 if (VT == MVT::i8 || VT == MVT::i1)
23424 return std::make_pair(0U, &X86::GR8_NOREXRegClass);
23425 if (VT == MVT::i16)
23426 return std::make_pair(0U, &X86::GR16_NOREXRegClass);
23427 if (VT == MVT::i32 || !Subtarget->is64Bit())
23428 return std::make_pair(0U, &X86::GR32_NOREXRegClass);
23429 return std::make_pair(0U, &X86::GR64_NOREXRegClass);
23430 case 'f': // FP Stack registers.
23431 // If SSE is enabled for this VT, use f80 to ensure the isel moves the
23432 // value to the correct fpstack register class.
23433 if (VT == MVT::f32 && !isScalarFPTypeInSSEReg(VT))
23434 return std::make_pair(0U, &X86::RFP32RegClass);
23435 if (VT == MVT::f64 && !isScalarFPTypeInSSEReg(VT))
23436 return std::make_pair(0U, &X86::RFP64RegClass);
23437 return std::make_pair(0U, &X86::RFP80RegClass);
23438 case 'y': // MMX_REGS if MMX allowed.
23439 if (!Subtarget->hasMMX()) break;
23440 return std::make_pair(0U, &X86::VR64RegClass);
23441 case 'Y': // SSE_REGS if SSE2 allowed
23442 if (!Subtarget->hasSSE2()) break;
23444 case 'x': // SSE_REGS if SSE1 allowed or AVX_REGS if AVX allowed
23445 if (!Subtarget->hasSSE1()) break;
23447 switch (VT.SimpleTy) {
23449 // Scalar SSE types.
23452 return std::make_pair(0U, &X86::FR32RegClass);
23455 return std::make_pair(0U, &X86::FR64RegClass);
23463 return std::make_pair(0U, &X86::VR128RegClass);
23471 return std::make_pair(0U, &X86::VR256RegClass);
23476 return std::make_pair(0U, &X86::VR512RegClass);
23482 // Use the default implementation in TargetLowering to convert the register
23483 // constraint into a member of a register class.
23484 std::pair<unsigned, const TargetRegisterClass*> Res;
23485 Res = TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
23487 // Not found as a standard register?
23489 // Map st(0) -> st(7) -> ST0
23490 if (Constraint.size() == 7 && Constraint[0] == '{' &&
23491 tolower(Constraint[1]) == 's' &&
23492 tolower(Constraint[2]) == 't' &&
23493 Constraint[3] == '(' &&
23494 (Constraint[4] >= '0' && Constraint[4] <= '7') &&
23495 Constraint[5] == ')' &&
23496 Constraint[6] == '}') {
23498 Res.first = X86::FP0+Constraint[4]-'0';
23499 Res.second = &X86::RFP80RegClass;
23503 // GCC allows "st(0)" to be called just plain "st".
23504 if (StringRef("{st}").equals_lower(Constraint)) {
23505 Res.first = X86::FP0;
23506 Res.second = &X86::RFP80RegClass;
23511 if (StringRef("{flags}").equals_lower(Constraint)) {
23512 Res.first = X86::EFLAGS;
23513 Res.second = &X86::CCRRegClass;
23517 // 'A' means EAX + EDX.
23518 if (Constraint == "A") {
23519 Res.first = X86::EAX;
23520 Res.second = &X86::GR32_ADRegClass;
23526 // Otherwise, check to see if this is a register class of the wrong value
23527 // type. For example, we want to map "{ax},i32" -> {eax}, we don't want it to
23528 // turn into {ax},{dx}.
23529 if (Res.second->hasType(VT))
23530 return Res; // Correct type already, nothing to do.
23532 // All of the single-register GCC register classes map their values onto
23533 // 16-bit register pieces "ax","dx","cx","bx","si","di","bp","sp". If we
23534 // really want an 8-bit or 32-bit register, map to the appropriate register
23535 // class and return the appropriate register.
23536 if (Res.second == &X86::GR16RegClass) {
23537 if (VT == MVT::i8 || VT == MVT::i1) {
23538 unsigned DestReg = 0;
23539 switch (Res.first) {
23541 case X86::AX: DestReg = X86::AL; break;
23542 case X86::DX: DestReg = X86::DL; break;
23543 case X86::CX: DestReg = X86::CL; break;
23544 case X86::BX: DestReg = X86::BL; break;
23547 Res.first = DestReg;
23548 Res.second = &X86::GR8RegClass;
23550 } else if (VT == MVT::i32 || VT == MVT::f32) {
23551 unsigned DestReg = 0;
23552 switch (Res.first) {
23554 case X86::AX: DestReg = X86::EAX; break;
23555 case X86::DX: DestReg = X86::EDX; break;
23556 case X86::CX: DestReg = X86::ECX; break;
23557 case X86::BX: DestReg = X86::EBX; break;
23558 case X86::SI: DestReg = X86::ESI; break;
23559 case X86::DI: DestReg = X86::EDI; break;
23560 case X86::BP: DestReg = X86::EBP; break;
23561 case X86::SP: DestReg = X86::ESP; break;
23564 Res.first = DestReg;
23565 Res.second = &X86::GR32RegClass;
23567 } else if (VT == MVT::i64 || VT == MVT::f64) {
23568 unsigned DestReg = 0;
23569 switch (Res.first) {
23571 case X86::AX: DestReg = X86::RAX; break;
23572 case X86::DX: DestReg = X86::RDX; break;
23573 case X86::CX: DestReg = X86::RCX; break;
23574 case X86::BX: DestReg = X86::RBX; break;
23575 case X86::SI: DestReg = X86::RSI; break;
23576 case X86::DI: DestReg = X86::RDI; break;
23577 case X86::BP: DestReg = X86::RBP; break;
23578 case X86::SP: DestReg = X86::RSP; break;
23581 Res.first = DestReg;
23582 Res.second = &X86::GR64RegClass;
23585 } else if (Res.second == &X86::FR32RegClass ||
23586 Res.second == &X86::FR64RegClass ||
23587 Res.second == &X86::VR128RegClass ||
23588 Res.second == &X86::VR256RegClass ||
23589 Res.second == &X86::FR32XRegClass ||
23590 Res.second == &X86::FR64XRegClass ||
23591 Res.second == &X86::VR128XRegClass ||
23592 Res.second == &X86::VR256XRegClass ||
23593 Res.second == &X86::VR512RegClass) {
23594 // Handle references to XMM physical registers that got mapped into the
23595 // wrong class. This can happen with constraints like {xmm0} where the
23596 // target independent register mapper will just pick the first match it can
23597 // find, ignoring the required type.
23599 if (VT == MVT::f32 || VT == MVT::i32)
23600 Res.second = &X86::FR32RegClass;
23601 else if (VT == MVT::f64 || VT == MVT::i64)
23602 Res.second = &X86::FR64RegClass;
23603 else if (X86::VR128RegClass.hasType(VT))
23604 Res.second = &X86::VR128RegClass;
23605 else if (X86::VR256RegClass.hasType(VT))
23606 Res.second = &X86::VR256RegClass;
23607 else if (X86::VR512RegClass.hasType(VT))
23608 Res.second = &X86::VR512RegClass;
23614 int X86TargetLowering::getScalingFactorCost(const AddrMode &AM,
23616 // Scaling factors are not free at all.
23617 // An indexed folded instruction, i.e., inst (reg1, reg2, scale),
23618 // will take 2 allocations in the out of order engine instead of 1
23619 // for plain addressing mode, i.e. inst (reg1).
23621 // vaddps (%rsi,%drx), %ymm0, %ymm1
23622 // Requires two allocations (one for the load, one for the computation)
23624 // vaddps (%rsi), %ymm0, %ymm1
23625 // Requires just 1 allocation, i.e., freeing allocations for other operations
23626 // and having less micro operations to execute.
23628 // For some X86 architectures, this is even worse because for instance for
23629 // stores, the complex addressing mode forces the instruction to use the
23630 // "load" ports instead of the dedicated "store" port.
23631 // E.g., on Haswell:
23632 // vmovaps %ymm1, (%r8, %rdi) can use port 2 or 3.
23633 // vmovaps %ymm1, (%r8) can use port 2, 3, or 7.
23634 if (isLegalAddressingMode(AM, Ty))
23635 // Scale represents reg2 * scale, thus account for 1
23636 // as soon as we use a second register.
23637 return AM.Scale != 0;
23641 bool X86TargetLowering::isTargetFTOL() const {
23642 return Subtarget->isTargetKnownWindowsMSVC() && !Subtarget->is64Bit();