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 #define DEBUG_TYPE "x86-isel"
16 #include "X86ISelLowering.h"
17 #include "Utils/X86ShuffleDecode.h"
19 #include "X86InstrBuilder.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/VariadicFunction.h"
26 #include "llvm/CodeGen/IntrinsicLowering.h"
27 #include "llvm/CodeGen/MachineFrameInfo.h"
28 #include "llvm/CodeGen/MachineFunction.h"
29 #include "llvm/CodeGen/MachineInstrBuilder.h"
30 #include "llvm/CodeGen/MachineJumpTableInfo.h"
31 #include "llvm/CodeGen/MachineModuleInfo.h"
32 #include "llvm/CodeGen/MachineRegisterInfo.h"
33 #include "llvm/IR/CallingConv.h"
34 #include "llvm/IR/Constants.h"
35 #include "llvm/IR/DerivedTypes.h"
36 #include "llvm/IR/Function.h"
37 #include "llvm/IR/GlobalAlias.h"
38 #include "llvm/IR/GlobalVariable.h"
39 #include "llvm/IR/Instructions.h"
40 #include "llvm/IR/Intrinsics.h"
41 #include "llvm/IR/LLVMContext.h"
42 #include "llvm/MC/MCAsmInfo.h"
43 #include "llvm/MC/MCContext.h"
44 #include "llvm/MC/MCExpr.h"
45 #include "llvm/MC/MCSymbol.h"
46 #include "llvm/Support/CallSite.h"
47 #include "llvm/Support/Debug.h"
48 #include "llvm/Support/ErrorHandling.h"
49 #include "llvm/Support/MathExtras.h"
50 #include "llvm/Target/TargetOptions.h"
55 STATISTIC(NumTailCalls, "Number of tail calls");
57 // Forward declarations.
58 static SDValue getMOVL(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
61 /// Generate a DAG to grab 128-bits from a vector > 128 bits. This
62 /// sets things up to match to an AVX VEXTRACTF128 instruction or a
63 /// simple subregister reference. Idx is an index in the 128 bits we
64 /// want. It need not be aligned to a 128-bit bounday. That makes
65 /// lowering EXTRACT_VECTOR_ELT operations easier.
66 static SDValue Extract128BitVector(SDValue Vec, unsigned IdxVal,
67 SelectionDAG &DAG, DebugLoc dl) {
68 EVT VT = Vec.getValueType();
69 assert(VT.is256BitVector() && "Unexpected vector size!");
70 EVT ElVT = VT.getVectorElementType();
71 unsigned Factor = VT.getSizeInBits()/128;
72 EVT ResultVT = EVT::getVectorVT(*DAG.getContext(), ElVT,
73 VT.getVectorNumElements()/Factor);
75 // Extract from UNDEF is UNDEF.
76 if (Vec.getOpcode() == ISD::UNDEF)
77 return DAG.getUNDEF(ResultVT);
79 // Extract the relevant 128 bits. Generate an EXTRACT_SUBVECTOR
80 // we can match to VEXTRACTF128.
81 unsigned ElemsPerChunk = 128 / ElVT.getSizeInBits();
83 // This is the index of the first element of the 128-bit chunk
85 unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits()) / 128)
88 // If the input is a buildvector just emit a smaller one.
89 if (Vec.getOpcode() == ISD::BUILD_VECTOR)
90 return DAG.getNode(ISD::BUILD_VECTOR, dl, ResultVT,
91 Vec->op_begin()+NormalizedIdxVal, ElemsPerChunk);
93 SDValue VecIdx = DAG.getIntPtrConstant(NormalizedIdxVal);
94 SDValue Result = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, ResultVT, Vec,
100 /// Generate a DAG to put 128-bits into a vector > 128 bits. This
101 /// sets things up to match to an AVX VINSERTF128 instruction or a
102 /// simple superregister reference. Idx is an index in the 128 bits
103 /// we want. It need not be aligned to a 128-bit bounday. That makes
104 /// lowering INSERT_VECTOR_ELT operations easier.
105 static SDValue Insert128BitVector(SDValue Result, SDValue Vec,
106 unsigned IdxVal, SelectionDAG &DAG,
108 // Inserting UNDEF is Result
109 if (Vec.getOpcode() == ISD::UNDEF)
112 EVT VT = Vec.getValueType();
113 assert(VT.is128BitVector() && "Unexpected vector size!");
115 EVT ElVT = VT.getVectorElementType();
116 EVT ResultVT = Result.getValueType();
118 // Insert the relevant 128 bits.
119 unsigned ElemsPerChunk = 128/ElVT.getSizeInBits();
121 // This is the index of the first element of the 128-bit chunk
123 unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits())/128)
126 SDValue VecIdx = DAG.getIntPtrConstant(NormalizedIdxVal);
127 return DAG.getNode(ISD::INSERT_SUBVECTOR, dl, ResultVT, Result, Vec,
131 /// Concat two 128-bit vectors into a 256 bit vector using VINSERTF128
132 /// instructions. This is used because creating CONCAT_VECTOR nodes of
133 /// BUILD_VECTORS returns a larger BUILD_VECTOR while we're trying to lower
134 /// large BUILD_VECTORS.
135 static SDValue Concat128BitVectors(SDValue V1, SDValue V2, EVT VT,
136 unsigned NumElems, SelectionDAG &DAG,
138 SDValue V = Insert128BitVector(DAG.getUNDEF(VT), V1, 0, DAG, dl);
139 return Insert128BitVector(V, V2, NumElems/2, DAG, dl);
142 static TargetLoweringObjectFile *createTLOF(X86TargetMachine &TM) {
143 const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
144 bool is64Bit = Subtarget->is64Bit();
146 if (Subtarget->isTargetEnvMacho()) {
148 return new X86_64MachoTargetObjectFile();
149 return new TargetLoweringObjectFileMachO();
152 if (Subtarget->isTargetLinux())
153 return new X86LinuxTargetObjectFile();
154 if (Subtarget->isTargetELF())
155 return new TargetLoweringObjectFileELF();
156 if (Subtarget->isTargetCOFF() && !Subtarget->isTargetEnvMacho())
157 return new TargetLoweringObjectFileCOFF();
158 llvm_unreachable("unknown subtarget type");
161 X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
162 : TargetLowering(TM, createTLOF(TM)) {
163 Subtarget = &TM.getSubtarget<X86Subtarget>();
164 X86ScalarSSEf64 = Subtarget->hasSSE2();
165 X86ScalarSSEf32 = Subtarget->hasSSE1();
167 RegInfo = TM.getRegisterInfo();
168 TD = getDataLayout();
170 // Set up the TargetLowering object.
171 static const MVT IntVTs[] = { MVT::i8, MVT::i16, MVT::i32, MVT::i64 };
173 // X86 is weird, it always uses i8 for shift amounts and setcc results.
174 setBooleanContents(ZeroOrOneBooleanContent);
175 // X86-SSE is even stranger. It uses -1 or 0 for vector masks.
176 setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
178 // For 64-bit since we have so many registers use the ILP scheduler, for
179 // 32-bit code use the register pressure specific scheduling.
180 // For Atom, always use ILP scheduling.
181 if (Subtarget->isAtom())
182 setSchedulingPreference(Sched::ILP);
183 else if (Subtarget->is64Bit())
184 setSchedulingPreference(Sched::ILP);
186 setSchedulingPreference(Sched::RegPressure);
187 setStackPointerRegisterToSaveRestore(RegInfo->getStackRegister());
189 // Bypass expensive divides on Atom when compiling with O2
190 if (Subtarget->hasSlowDivide() && TM.getOptLevel() >= CodeGenOpt::Default) {
191 addBypassSlowDiv(32, 8);
192 if (Subtarget->is64Bit())
193 addBypassSlowDiv(64, 16);
196 if (Subtarget->isTargetWindows() && !Subtarget->isTargetCygMing()) {
197 // Setup Windows compiler runtime calls.
198 setLibcallName(RTLIB::SDIV_I64, "_alldiv");
199 setLibcallName(RTLIB::UDIV_I64, "_aulldiv");
200 setLibcallName(RTLIB::SREM_I64, "_allrem");
201 setLibcallName(RTLIB::UREM_I64, "_aullrem");
202 setLibcallName(RTLIB::MUL_I64, "_allmul");
203 setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::X86_StdCall);
204 setLibcallCallingConv(RTLIB::UDIV_I64, CallingConv::X86_StdCall);
205 setLibcallCallingConv(RTLIB::SREM_I64, CallingConv::X86_StdCall);
206 setLibcallCallingConv(RTLIB::UREM_I64, CallingConv::X86_StdCall);
207 setLibcallCallingConv(RTLIB::MUL_I64, CallingConv::X86_StdCall);
209 // The _ftol2 runtime function has an unusual calling conv, which
210 // is modeled by a special pseudo-instruction.
211 setLibcallName(RTLIB::FPTOUINT_F64_I64, 0);
212 setLibcallName(RTLIB::FPTOUINT_F32_I64, 0);
213 setLibcallName(RTLIB::FPTOUINT_F64_I32, 0);
214 setLibcallName(RTLIB::FPTOUINT_F32_I32, 0);
217 if (Subtarget->isTargetDarwin()) {
218 // Darwin should use _setjmp/_longjmp instead of setjmp/longjmp.
219 setUseUnderscoreSetJmp(false);
220 setUseUnderscoreLongJmp(false);
221 } else if (Subtarget->isTargetMingw()) {
222 // MS runtime is weird: it exports _setjmp, but longjmp!
223 setUseUnderscoreSetJmp(true);
224 setUseUnderscoreLongJmp(false);
226 setUseUnderscoreSetJmp(true);
227 setUseUnderscoreLongJmp(true);
230 // Set up the register classes.
231 addRegisterClass(MVT::i8, &X86::GR8RegClass);
232 addRegisterClass(MVT::i16, &X86::GR16RegClass);
233 addRegisterClass(MVT::i32, &X86::GR32RegClass);
234 if (Subtarget->is64Bit())
235 addRegisterClass(MVT::i64, &X86::GR64RegClass);
237 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
239 // We don't accept any truncstore of integer registers.
240 setTruncStoreAction(MVT::i64, MVT::i32, Expand);
241 setTruncStoreAction(MVT::i64, MVT::i16, Expand);
242 setTruncStoreAction(MVT::i64, MVT::i8 , Expand);
243 setTruncStoreAction(MVT::i32, MVT::i16, Expand);
244 setTruncStoreAction(MVT::i32, MVT::i8 , Expand);
245 setTruncStoreAction(MVT::i16, MVT::i8, Expand);
247 // SETOEQ and SETUNE require checking two conditions.
248 setCondCodeAction(ISD::SETOEQ, MVT::f32, Expand);
249 setCondCodeAction(ISD::SETOEQ, MVT::f64, Expand);
250 setCondCodeAction(ISD::SETOEQ, MVT::f80, Expand);
251 setCondCodeAction(ISD::SETUNE, MVT::f32, Expand);
252 setCondCodeAction(ISD::SETUNE, MVT::f64, Expand);
253 setCondCodeAction(ISD::SETUNE, MVT::f80, Expand);
255 // Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this
257 setOperationAction(ISD::UINT_TO_FP , MVT::i1 , Promote);
258 setOperationAction(ISD::UINT_TO_FP , MVT::i8 , Promote);
259 setOperationAction(ISD::UINT_TO_FP , MVT::i16 , Promote);
261 if (Subtarget->is64Bit()) {
262 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Promote);
263 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Custom);
264 } else if (!TM.Options.UseSoftFloat) {
265 // We have an algorithm for SSE2->double, and we turn this into a
266 // 64-bit FILD followed by conditional FADD for other targets.
267 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Custom);
268 // We have an algorithm for SSE2, and we turn this into a 64-bit
269 // FILD for other targets.
270 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Custom);
273 // Promote i1/i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have
275 setOperationAction(ISD::SINT_TO_FP , MVT::i1 , Promote);
276 setOperationAction(ISD::SINT_TO_FP , MVT::i8 , Promote);
278 if (!TM.Options.UseSoftFloat) {
279 // SSE has no i16 to fp conversion, only i32
280 if (X86ScalarSSEf32) {
281 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
282 // f32 and f64 cases are Legal, f80 case is not
283 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
285 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Custom);
286 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
289 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
290 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Promote);
293 // In 32-bit mode these are custom lowered. In 64-bit mode F32 and F64
294 // are Legal, f80 is custom lowered.
295 setOperationAction(ISD::FP_TO_SINT , MVT::i64 , Custom);
296 setOperationAction(ISD::SINT_TO_FP , MVT::i64 , Custom);
298 // Promote i1/i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have
300 setOperationAction(ISD::FP_TO_SINT , MVT::i1 , Promote);
301 setOperationAction(ISD::FP_TO_SINT , MVT::i8 , Promote);
303 if (X86ScalarSSEf32) {
304 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Promote);
305 // f32 and f64 cases are Legal, f80 case is not
306 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
308 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Custom);
309 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
312 // Handle FP_TO_UINT by promoting the destination to a larger signed
314 setOperationAction(ISD::FP_TO_UINT , MVT::i1 , Promote);
315 setOperationAction(ISD::FP_TO_UINT , MVT::i8 , Promote);
316 setOperationAction(ISD::FP_TO_UINT , MVT::i16 , Promote);
318 if (Subtarget->is64Bit()) {
319 setOperationAction(ISD::FP_TO_UINT , MVT::i64 , Expand);
320 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
321 } else if (!TM.Options.UseSoftFloat) {
322 // Since AVX is a superset of SSE3, only check for SSE here.
323 if (Subtarget->hasSSE1() && !Subtarget->hasSSE3())
324 // Expand FP_TO_UINT into a select.
325 // FIXME: We would like to use a Custom expander here eventually to do
326 // the optimal thing for SSE vs. the default expansion in the legalizer.
327 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Expand);
329 // With SSE3 we can use fisttpll to convert to a signed i64; without
330 // SSE, we're stuck with a fistpll.
331 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Custom);
334 if (isTargetFTOL()) {
335 // Use the _ftol2 runtime function, which has a pseudo-instruction
336 // to handle its weird calling convention.
337 setOperationAction(ISD::FP_TO_UINT , MVT::i64 , Custom);
340 // TODO: when we have SSE, these could be more efficient, by using movd/movq.
341 if (!X86ScalarSSEf64) {
342 setOperationAction(ISD::BITCAST , MVT::f32 , Expand);
343 setOperationAction(ISD::BITCAST , MVT::i32 , Expand);
344 if (Subtarget->is64Bit()) {
345 setOperationAction(ISD::BITCAST , MVT::f64 , Expand);
346 // Without SSE, i64->f64 goes through memory.
347 setOperationAction(ISD::BITCAST , MVT::i64 , Expand);
351 // Scalar integer divide and remainder are lowered to use operations that
352 // produce two results, to match the available instructions. This exposes
353 // the two-result form to trivial CSE, which is able to combine x/y and x%y
354 // into a single instruction.
356 // Scalar integer multiply-high is also lowered to use two-result
357 // operations, to match the available instructions. However, plain multiply
358 // (low) operations are left as Legal, as there are single-result
359 // instructions for this in x86. Using the two-result multiply instructions
360 // when both high and low results are needed must be arranged by dagcombine.
361 for (unsigned i = 0; i != array_lengthof(IntVTs); ++i) {
363 setOperationAction(ISD::MULHS, VT, Expand);
364 setOperationAction(ISD::MULHU, VT, Expand);
365 setOperationAction(ISD::SDIV, VT, Expand);
366 setOperationAction(ISD::UDIV, VT, Expand);
367 setOperationAction(ISD::SREM, VT, Expand);
368 setOperationAction(ISD::UREM, VT, Expand);
370 // Add/Sub overflow ops with MVT::Glues are lowered to EFLAGS dependences.
371 setOperationAction(ISD::ADDC, VT, Custom);
372 setOperationAction(ISD::ADDE, VT, Custom);
373 setOperationAction(ISD::SUBC, VT, Custom);
374 setOperationAction(ISD::SUBE, VT, Custom);
377 setOperationAction(ISD::BR_JT , MVT::Other, Expand);
378 setOperationAction(ISD::BRCOND , MVT::Other, Custom);
379 setOperationAction(ISD::BR_CC , MVT::f32, Expand);
380 setOperationAction(ISD::BR_CC , MVT::f64, Expand);
381 setOperationAction(ISD::BR_CC , MVT::f80, Expand);
382 setOperationAction(ISD::BR_CC , MVT::i8, Expand);
383 setOperationAction(ISD::BR_CC , MVT::i16, Expand);
384 setOperationAction(ISD::BR_CC , MVT::i32, Expand);
385 setOperationAction(ISD::BR_CC , MVT::i64, Expand);
386 setOperationAction(ISD::SELECT_CC , MVT::Other, Expand);
387 if (Subtarget->is64Bit())
388 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i32, Legal);
389 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16 , Legal);
390 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Legal);
391 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
392 setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
393 setOperationAction(ISD::FREM , MVT::f32 , Expand);
394 setOperationAction(ISD::FREM , MVT::f64 , Expand);
395 setOperationAction(ISD::FREM , MVT::f80 , Expand);
396 setOperationAction(ISD::FLT_ROUNDS_ , MVT::i32 , Custom);
398 // Promote the i8 variants and force them on up to i32 which has a shorter
400 setOperationAction(ISD::CTTZ , MVT::i8 , Promote);
401 AddPromotedToType (ISD::CTTZ , MVT::i8 , MVT::i32);
402 setOperationAction(ISD::CTTZ_ZERO_UNDEF , MVT::i8 , Promote);
403 AddPromotedToType (ISD::CTTZ_ZERO_UNDEF , MVT::i8 , MVT::i32);
404 if (Subtarget->hasBMI()) {
405 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i16 , Expand);
406 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32 , Expand);
407 if (Subtarget->is64Bit())
408 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i64, Expand);
410 setOperationAction(ISD::CTTZ , MVT::i16 , Custom);
411 setOperationAction(ISD::CTTZ , MVT::i32 , Custom);
412 if (Subtarget->is64Bit())
413 setOperationAction(ISD::CTTZ , MVT::i64 , Custom);
416 if (Subtarget->hasLZCNT()) {
417 // When promoting the i8 variants, force them to i32 for a shorter
419 setOperationAction(ISD::CTLZ , MVT::i8 , Promote);
420 AddPromotedToType (ISD::CTLZ , MVT::i8 , MVT::i32);
421 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i8 , Promote);
422 AddPromotedToType (ISD::CTLZ_ZERO_UNDEF, MVT::i8 , MVT::i32);
423 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i16 , Expand);
424 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32 , Expand);
425 if (Subtarget->is64Bit())
426 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Expand);
428 setOperationAction(ISD::CTLZ , MVT::i8 , Custom);
429 setOperationAction(ISD::CTLZ , MVT::i16 , Custom);
430 setOperationAction(ISD::CTLZ , MVT::i32 , Custom);
431 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i8 , Custom);
432 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i16 , Custom);
433 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32 , Custom);
434 if (Subtarget->is64Bit()) {
435 setOperationAction(ISD::CTLZ , MVT::i64 , Custom);
436 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Custom);
440 if (Subtarget->hasPOPCNT()) {
441 setOperationAction(ISD::CTPOP , MVT::i8 , Promote);
443 setOperationAction(ISD::CTPOP , MVT::i8 , Expand);
444 setOperationAction(ISD::CTPOP , MVT::i16 , Expand);
445 setOperationAction(ISD::CTPOP , MVT::i32 , Expand);
446 if (Subtarget->is64Bit())
447 setOperationAction(ISD::CTPOP , MVT::i64 , Expand);
450 setOperationAction(ISD::READCYCLECOUNTER , MVT::i64 , Custom);
451 setOperationAction(ISD::BSWAP , MVT::i16 , Expand);
453 // These should be promoted to a larger select which is supported.
454 setOperationAction(ISD::SELECT , MVT::i1 , Promote);
455 // X86 wants to expand cmov itself.
456 setOperationAction(ISD::SELECT , MVT::i8 , Custom);
457 setOperationAction(ISD::SELECT , MVT::i16 , Custom);
458 setOperationAction(ISD::SELECT , MVT::i32 , Custom);
459 setOperationAction(ISD::SELECT , MVT::f32 , Custom);
460 setOperationAction(ISD::SELECT , MVT::f64 , Custom);
461 setOperationAction(ISD::SELECT , MVT::f80 , Custom);
462 setOperationAction(ISD::SETCC , MVT::i8 , Custom);
463 setOperationAction(ISD::SETCC , MVT::i16 , Custom);
464 setOperationAction(ISD::SETCC , MVT::i32 , Custom);
465 setOperationAction(ISD::SETCC , MVT::f32 , Custom);
466 setOperationAction(ISD::SETCC , MVT::f64 , Custom);
467 setOperationAction(ISD::SETCC , MVT::f80 , Custom);
468 if (Subtarget->is64Bit()) {
469 setOperationAction(ISD::SELECT , MVT::i64 , Custom);
470 setOperationAction(ISD::SETCC , MVT::i64 , Custom);
472 setOperationAction(ISD::EH_RETURN , MVT::Other, Custom);
473 // NOTE: EH_SJLJ_SETJMP/_LONGJMP supported here is NOT intened to support
474 // SjLj exception handling but a light-weight setjmp/longjmp replacement to
475 // support continuation, user-level threading, and etc.. As a result, no
476 // other SjLj exception interfaces are implemented and please don't build
477 // your own exception handling based on them.
478 // LLVM/Clang supports zero-cost DWARF exception handling.
479 setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom);
480 setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom);
483 setOperationAction(ISD::ConstantPool , MVT::i32 , Custom);
484 setOperationAction(ISD::JumpTable , MVT::i32 , Custom);
485 setOperationAction(ISD::GlobalAddress , MVT::i32 , Custom);
486 setOperationAction(ISD::GlobalTLSAddress, MVT::i32 , Custom);
487 if (Subtarget->is64Bit())
488 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
489 setOperationAction(ISD::ExternalSymbol , MVT::i32 , Custom);
490 setOperationAction(ISD::BlockAddress , MVT::i32 , Custom);
491 if (Subtarget->is64Bit()) {
492 setOperationAction(ISD::ConstantPool , MVT::i64 , Custom);
493 setOperationAction(ISD::JumpTable , MVT::i64 , Custom);
494 setOperationAction(ISD::GlobalAddress , MVT::i64 , Custom);
495 setOperationAction(ISD::ExternalSymbol, MVT::i64 , Custom);
496 setOperationAction(ISD::BlockAddress , MVT::i64 , Custom);
498 // 64-bit addm sub, shl, sra, srl (iff 32-bit x86)
499 setOperationAction(ISD::SHL_PARTS , MVT::i32 , Custom);
500 setOperationAction(ISD::SRA_PARTS , MVT::i32 , Custom);
501 setOperationAction(ISD::SRL_PARTS , MVT::i32 , Custom);
502 if (Subtarget->is64Bit()) {
503 setOperationAction(ISD::SHL_PARTS , MVT::i64 , Custom);
504 setOperationAction(ISD::SRA_PARTS , MVT::i64 , Custom);
505 setOperationAction(ISD::SRL_PARTS , MVT::i64 , Custom);
508 if (Subtarget->hasSSE1())
509 setOperationAction(ISD::PREFETCH , MVT::Other, Legal);
511 setOperationAction(ISD::MEMBARRIER , MVT::Other, Custom);
512 setOperationAction(ISD::ATOMIC_FENCE , MVT::Other, Custom);
514 // On X86 and X86-64, atomic operations are lowered to locked instructions.
515 // Locked instructions, in turn, have implicit fence semantics (all memory
516 // operations are flushed before issuing the locked instruction, and they
517 // are not buffered), so we can fold away the common pattern of
518 // fence-atomic-fence.
519 setShouldFoldAtomicFences(true);
521 // Expand certain atomics
522 for (unsigned i = 0; i != array_lengthof(IntVTs); ++i) {
524 setOperationAction(ISD::ATOMIC_CMP_SWAP, VT, Custom);
525 setOperationAction(ISD::ATOMIC_LOAD_SUB, VT, Custom);
526 setOperationAction(ISD::ATOMIC_STORE, VT, Custom);
529 if (!Subtarget->is64Bit()) {
530 setOperationAction(ISD::ATOMIC_LOAD, MVT::i64, Custom);
531 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i64, Custom);
532 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i64, Custom);
533 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i64, Custom);
534 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i64, Custom);
535 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i64, Custom);
536 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i64, Custom);
537 setOperationAction(ISD::ATOMIC_SWAP, MVT::i64, Custom);
538 setOperationAction(ISD::ATOMIC_LOAD_MAX, MVT::i64, Custom);
539 setOperationAction(ISD::ATOMIC_LOAD_MIN, MVT::i64, Custom);
540 setOperationAction(ISD::ATOMIC_LOAD_UMAX, MVT::i64, Custom);
541 setOperationAction(ISD::ATOMIC_LOAD_UMIN, MVT::i64, Custom);
544 if (Subtarget->hasCmpxchg16b()) {
545 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i128, Custom);
548 // FIXME - use subtarget debug flags
549 if (!Subtarget->isTargetDarwin() &&
550 !Subtarget->isTargetELF() &&
551 !Subtarget->isTargetCygMing()) {
552 setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
555 setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
556 setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
557 setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
558 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
559 if (Subtarget->is64Bit()) {
560 setExceptionPointerRegister(X86::RAX);
561 setExceptionSelectorRegister(X86::RDX);
563 setExceptionPointerRegister(X86::EAX);
564 setExceptionSelectorRegister(X86::EDX);
566 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i32, Custom);
567 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i64, Custom);
569 setOperationAction(ISD::INIT_TRAMPOLINE, MVT::Other, Custom);
570 setOperationAction(ISD::ADJUST_TRAMPOLINE, MVT::Other, Custom);
572 setOperationAction(ISD::TRAP, MVT::Other, Legal);
573 setOperationAction(ISD::DEBUGTRAP, MVT::Other, Legal);
575 // VASTART needs to be custom lowered to use the VarArgsFrameIndex
576 setOperationAction(ISD::VASTART , MVT::Other, Custom);
577 setOperationAction(ISD::VAEND , MVT::Other, Expand);
578 if (Subtarget->is64Bit()) {
579 setOperationAction(ISD::VAARG , MVT::Other, Custom);
580 setOperationAction(ISD::VACOPY , MVT::Other, Custom);
582 setOperationAction(ISD::VAARG , MVT::Other, Expand);
583 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
586 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
587 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
589 if (Subtarget->isTargetCOFF() && !Subtarget->isTargetEnvMacho())
590 setOperationAction(ISD::DYNAMIC_STACKALLOC, Subtarget->is64Bit() ?
591 MVT::i64 : MVT::i32, Custom);
592 else if (TM.Options.EnableSegmentedStacks)
593 setOperationAction(ISD::DYNAMIC_STACKALLOC, Subtarget->is64Bit() ?
594 MVT::i64 : MVT::i32, Custom);
596 setOperationAction(ISD::DYNAMIC_STACKALLOC, Subtarget->is64Bit() ?
597 MVT::i64 : MVT::i32, Expand);
599 if (!TM.Options.UseSoftFloat && X86ScalarSSEf64) {
600 // f32 and f64 use SSE.
601 // Set up the FP register classes.
602 addRegisterClass(MVT::f32, &X86::FR32RegClass);
603 addRegisterClass(MVT::f64, &X86::FR64RegClass);
605 // Use ANDPD to simulate FABS.
606 setOperationAction(ISD::FABS , MVT::f64, Custom);
607 setOperationAction(ISD::FABS , MVT::f32, Custom);
609 // Use XORP to simulate FNEG.
610 setOperationAction(ISD::FNEG , MVT::f64, Custom);
611 setOperationAction(ISD::FNEG , MVT::f32, Custom);
613 // Use ANDPD and ORPD to simulate FCOPYSIGN.
614 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
615 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
617 // Lower this to FGETSIGNx86 plus an AND.
618 setOperationAction(ISD::FGETSIGN, MVT::i64, Custom);
619 setOperationAction(ISD::FGETSIGN, MVT::i32, Custom);
621 // We don't support sin/cos/fmod
622 setOperationAction(ISD::FSIN , MVT::f64, Expand);
623 setOperationAction(ISD::FCOS , MVT::f64, Expand);
624 setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
625 setOperationAction(ISD::FSIN , MVT::f32, Expand);
626 setOperationAction(ISD::FCOS , MVT::f32, Expand);
627 setOperationAction(ISD::FSINCOS, MVT::f32, Expand);
629 // Expand FP immediates into loads from the stack, except for the special
631 addLegalFPImmediate(APFloat(+0.0)); // xorpd
632 addLegalFPImmediate(APFloat(+0.0f)); // xorps
633 } else if (!TM.Options.UseSoftFloat && X86ScalarSSEf32) {
634 // Use SSE for f32, x87 for f64.
635 // Set up the FP register classes.
636 addRegisterClass(MVT::f32, &X86::FR32RegClass);
637 addRegisterClass(MVT::f64, &X86::RFP64RegClass);
639 // Use ANDPS to simulate FABS.
640 setOperationAction(ISD::FABS , MVT::f32, Custom);
642 // Use XORP to simulate FNEG.
643 setOperationAction(ISD::FNEG , MVT::f32, Custom);
645 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
647 // Use ANDPS and ORPS to simulate FCOPYSIGN.
648 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
649 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
651 // We don't support sin/cos/fmod
652 setOperationAction(ISD::FSIN , MVT::f32, Expand);
653 setOperationAction(ISD::FCOS , MVT::f32, Expand);
654 setOperationAction(ISD::FSINCOS, MVT::f32, Expand);
656 // Special cases we handle for FP constants.
657 addLegalFPImmediate(APFloat(+0.0f)); // xorps
658 addLegalFPImmediate(APFloat(+0.0)); // FLD0
659 addLegalFPImmediate(APFloat(+1.0)); // FLD1
660 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
661 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
663 if (!TM.Options.UnsafeFPMath) {
664 setOperationAction(ISD::FSIN , MVT::f64, Expand);
665 setOperationAction(ISD::FCOS , MVT::f64, Expand);
666 setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
668 } else if (!TM.Options.UseSoftFloat) {
669 // f32 and f64 in x87.
670 // Set up the FP register classes.
671 addRegisterClass(MVT::f64, &X86::RFP64RegClass);
672 addRegisterClass(MVT::f32, &X86::RFP32RegClass);
674 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
675 setOperationAction(ISD::UNDEF, MVT::f32, Expand);
676 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
677 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
679 if (!TM.Options.UnsafeFPMath) {
680 setOperationAction(ISD::FSIN , MVT::f64, Expand);
681 setOperationAction(ISD::FSIN , MVT::f32, Expand);
682 setOperationAction(ISD::FCOS , MVT::f64, Expand);
683 setOperationAction(ISD::FCOS , MVT::f32, Expand);
684 setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
685 setOperationAction(ISD::FSINCOS, MVT::f32, Expand);
687 addLegalFPImmediate(APFloat(+0.0)); // FLD0
688 addLegalFPImmediate(APFloat(+1.0)); // FLD1
689 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
690 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
691 addLegalFPImmediate(APFloat(+0.0f)); // FLD0
692 addLegalFPImmediate(APFloat(+1.0f)); // FLD1
693 addLegalFPImmediate(APFloat(-0.0f)); // FLD0/FCHS
694 addLegalFPImmediate(APFloat(-1.0f)); // FLD1/FCHS
697 // We don't support FMA.
698 setOperationAction(ISD::FMA, MVT::f64, Expand);
699 setOperationAction(ISD::FMA, MVT::f32, Expand);
701 // Long double always uses X87.
702 if (!TM.Options.UseSoftFloat) {
703 addRegisterClass(MVT::f80, &X86::RFP80RegClass);
704 setOperationAction(ISD::UNDEF, MVT::f80, Expand);
705 setOperationAction(ISD::FCOPYSIGN, MVT::f80, Expand);
707 APFloat TmpFlt = APFloat::getZero(APFloat::x87DoubleExtended);
708 addLegalFPImmediate(TmpFlt); // FLD0
710 addLegalFPImmediate(TmpFlt); // FLD0/FCHS
713 APFloat TmpFlt2(+1.0);
714 TmpFlt2.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven,
716 addLegalFPImmediate(TmpFlt2); // FLD1
717 TmpFlt2.changeSign();
718 addLegalFPImmediate(TmpFlt2); // FLD1/FCHS
721 if (!TM.Options.UnsafeFPMath) {
722 setOperationAction(ISD::FSIN , MVT::f80, Expand);
723 setOperationAction(ISD::FCOS , MVT::f80, Expand);
724 setOperationAction(ISD::FSINCOS, MVT::f80, Expand);
727 setOperationAction(ISD::FFLOOR, MVT::f80, Expand);
728 setOperationAction(ISD::FCEIL, MVT::f80, Expand);
729 setOperationAction(ISD::FTRUNC, MVT::f80, Expand);
730 setOperationAction(ISD::FRINT, MVT::f80, Expand);
731 setOperationAction(ISD::FNEARBYINT, MVT::f80, Expand);
732 setOperationAction(ISD::FMA, MVT::f80, Expand);
735 // Always use a library call for pow.
736 setOperationAction(ISD::FPOW , MVT::f32 , Expand);
737 setOperationAction(ISD::FPOW , MVT::f64 , Expand);
738 setOperationAction(ISD::FPOW , MVT::f80 , Expand);
740 setOperationAction(ISD::FLOG, MVT::f80, Expand);
741 setOperationAction(ISD::FLOG2, MVT::f80, Expand);
742 setOperationAction(ISD::FLOG10, MVT::f80, Expand);
743 setOperationAction(ISD::FEXP, MVT::f80, Expand);
744 setOperationAction(ISD::FEXP2, MVT::f80, Expand);
746 // First set operation action for all vector types to either promote
747 // (for widening) or expand (for scalarization). Then we will selectively
748 // turn on ones that can be effectively codegen'd.
749 for (int i = MVT::FIRST_VECTOR_VALUETYPE;
750 i <= MVT::LAST_VECTOR_VALUETYPE; ++i) {
751 MVT VT = (MVT::SimpleValueType)i;
752 setOperationAction(ISD::ADD , VT, Expand);
753 setOperationAction(ISD::SUB , VT, Expand);
754 setOperationAction(ISD::FADD, VT, Expand);
755 setOperationAction(ISD::FNEG, VT, Expand);
756 setOperationAction(ISD::FSUB, VT, Expand);
757 setOperationAction(ISD::MUL , VT, Expand);
758 setOperationAction(ISD::FMUL, VT, Expand);
759 setOperationAction(ISD::SDIV, VT, Expand);
760 setOperationAction(ISD::UDIV, VT, Expand);
761 setOperationAction(ISD::FDIV, VT, Expand);
762 setOperationAction(ISD::SREM, VT, Expand);
763 setOperationAction(ISD::UREM, VT, Expand);
764 setOperationAction(ISD::LOAD, VT, Expand);
765 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Expand);
766 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT,Expand);
767 setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Expand);
768 setOperationAction(ISD::EXTRACT_SUBVECTOR, VT,Expand);
769 setOperationAction(ISD::INSERT_SUBVECTOR, VT,Expand);
770 setOperationAction(ISD::FABS, VT, Expand);
771 setOperationAction(ISD::FSIN, VT, Expand);
772 setOperationAction(ISD::FSINCOS, VT, Expand);
773 setOperationAction(ISD::FCOS, VT, Expand);
774 setOperationAction(ISD::FSINCOS, VT, Expand);
775 setOperationAction(ISD::FREM, VT, Expand);
776 setOperationAction(ISD::FMA, VT, Expand);
777 setOperationAction(ISD::FPOWI, VT, Expand);
778 setOperationAction(ISD::FSQRT, VT, Expand);
779 setOperationAction(ISD::FCOPYSIGN, VT, Expand);
780 setOperationAction(ISD::FFLOOR, VT, Expand);
781 setOperationAction(ISD::FCEIL, VT, Expand);
782 setOperationAction(ISD::FTRUNC, VT, Expand);
783 setOperationAction(ISD::FRINT, VT, Expand);
784 setOperationAction(ISD::FNEARBYINT, VT, Expand);
785 setOperationAction(ISD::SMUL_LOHI, VT, Expand);
786 setOperationAction(ISD::UMUL_LOHI, VT, Expand);
787 setOperationAction(ISD::SDIVREM, VT, Expand);
788 setOperationAction(ISD::UDIVREM, VT, Expand);
789 setOperationAction(ISD::FPOW, VT, Expand);
790 setOperationAction(ISD::CTPOP, VT, Expand);
791 setOperationAction(ISD::CTTZ, VT, Expand);
792 setOperationAction(ISD::CTTZ_ZERO_UNDEF, VT, Expand);
793 setOperationAction(ISD::CTLZ, VT, Expand);
794 setOperationAction(ISD::CTLZ_ZERO_UNDEF, VT, Expand);
795 setOperationAction(ISD::SHL, VT, Expand);
796 setOperationAction(ISD::SRA, VT, Expand);
797 setOperationAction(ISD::SRL, VT, Expand);
798 setOperationAction(ISD::ROTL, VT, Expand);
799 setOperationAction(ISD::ROTR, VT, Expand);
800 setOperationAction(ISD::BSWAP, VT, Expand);
801 setOperationAction(ISD::SETCC, VT, Expand);
802 setOperationAction(ISD::FLOG, VT, Expand);
803 setOperationAction(ISD::FLOG2, VT, Expand);
804 setOperationAction(ISD::FLOG10, VT, Expand);
805 setOperationAction(ISD::FEXP, VT, Expand);
806 setOperationAction(ISD::FEXP2, VT, Expand);
807 setOperationAction(ISD::FP_TO_UINT, VT, Expand);
808 setOperationAction(ISD::FP_TO_SINT, VT, Expand);
809 setOperationAction(ISD::UINT_TO_FP, VT, Expand);
810 setOperationAction(ISD::SINT_TO_FP, VT, Expand);
811 setOperationAction(ISD::SIGN_EXTEND_INREG, VT,Expand);
812 setOperationAction(ISD::TRUNCATE, VT, Expand);
813 setOperationAction(ISD::SIGN_EXTEND, VT, Expand);
814 setOperationAction(ISD::ZERO_EXTEND, VT, Expand);
815 setOperationAction(ISD::ANY_EXTEND, VT, Expand);
816 setOperationAction(ISD::VSELECT, VT, Expand);
817 for (int InnerVT = MVT::FIRST_VECTOR_VALUETYPE;
818 InnerVT <= MVT::LAST_VECTOR_VALUETYPE; ++InnerVT)
819 setTruncStoreAction(VT,
820 (MVT::SimpleValueType)InnerVT, Expand);
821 setLoadExtAction(ISD::SEXTLOAD, VT, Expand);
822 setLoadExtAction(ISD::ZEXTLOAD, VT, Expand);
823 setLoadExtAction(ISD::EXTLOAD, VT, Expand);
826 // FIXME: In order to prevent SSE instructions being expanded to MMX ones
827 // with -msoft-float, disable use of MMX as well.
828 if (!TM.Options.UseSoftFloat && Subtarget->hasMMX()) {
829 addRegisterClass(MVT::x86mmx, &X86::VR64RegClass);
830 // No operations on x86mmx supported, everything uses intrinsics.
833 // MMX-sized vectors (other than x86mmx) are expected to be expanded
834 // into smaller operations.
835 setOperationAction(ISD::MULHS, MVT::v8i8, Expand);
836 setOperationAction(ISD::MULHS, MVT::v4i16, Expand);
837 setOperationAction(ISD::MULHS, MVT::v2i32, Expand);
838 setOperationAction(ISD::MULHS, MVT::v1i64, Expand);
839 setOperationAction(ISD::AND, MVT::v8i8, Expand);
840 setOperationAction(ISD::AND, MVT::v4i16, Expand);
841 setOperationAction(ISD::AND, MVT::v2i32, Expand);
842 setOperationAction(ISD::AND, MVT::v1i64, Expand);
843 setOperationAction(ISD::OR, MVT::v8i8, Expand);
844 setOperationAction(ISD::OR, MVT::v4i16, Expand);
845 setOperationAction(ISD::OR, MVT::v2i32, Expand);
846 setOperationAction(ISD::OR, MVT::v1i64, Expand);
847 setOperationAction(ISD::XOR, MVT::v8i8, Expand);
848 setOperationAction(ISD::XOR, MVT::v4i16, Expand);
849 setOperationAction(ISD::XOR, MVT::v2i32, Expand);
850 setOperationAction(ISD::XOR, MVT::v1i64, Expand);
851 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i8, Expand);
852 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i16, Expand);
853 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v2i32, Expand);
854 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v1i64, Expand);
855 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v1i64, Expand);
856 setOperationAction(ISD::SELECT, MVT::v8i8, Expand);
857 setOperationAction(ISD::SELECT, MVT::v4i16, Expand);
858 setOperationAction(ISD::SELECT, MVT::v2i32, Expand);
859 setOperationAction(ISD::SELECT, MVT::v1i64, Expand);
860 setOperationAction(ISD::BITCAST, MVT::v8i8, Expand);
861 setOperationAction(ISD::BITCAST, MVT::v4i16, Expand);
862 setOperationAction(ISD::BITCAST, MVT::v2i32, Expand);
863 setOperationAction(ISD::BITCAST, MVT::v1i64, Expand);
865 if (!TM.Options.UseSoftFloat && Subtarget->hasSSE1()) {
866 addRegisterClass(MVT::v4f32, &X86::VR128RegClass);
868 setOperationAction(ISD::FADD, MVT::v4f32, Legal);
869 setOperationAction(ISD::FSUB, MVT::v4f32, Legal);
870 setOperationAction(ISD::FMUL, MVT::v4f32, Legal);
871 setOperationAction(ISD::FDIV, MVT::v4f32, Legal);
872 setOperationAction(ISD::FSQRT, MVT::v4f32, Legal);
873 setOperationAction(ISD::FNEG, MVT::v4f32, Custom);
874 setOperationAction(ISD::FABS, MVT::v4f32, Custom);
875 setOperationAction(ISD::LOAD, MVT::v4f32, Legal);
876 setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
877 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4f32, Custom);
878 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
879 setOperationAction(ISD::SELECT, MVT::v4f32, Custom);
882 if (!TM.Options.UseSoftFloat && Subtarget->hasSSE2()) {
883 addRegisterClass(MVT::v2f64, &X86::VR128RegClass);
885 // FIXME: Unfortunately -soft-float and -no-implicit-float means XMM
886 // registers cannot be used even for integer operations.
887 addRegisterClass(MVT::v16i8, &X86::VR128RegClass);
888 addRegisterClass(MVT::v8i16, &X86::VR128RegClass);
889 addRegisterClass(MVT::v4i32, &X86::VR128RegClass);
890 addRegisterClass(MVT::v2i64, &X86::VR128RegClass);
892 setOperationAction(ISD::ADD, MVT::v16i8, Legal);
893 setOperationAction(ISD::ADD, MVT::v8i16, Legal);
894 setOperationAction(ISD::ADD, MVT::v4i32, Legal);
895 setOperationAction(ISD::ADD, MVT::v2i64, Legal);
896 setOperationAction(ISD::MUL, MVT::v4i32, Custom);
897 setOperationAction(ISD::MUL, MVT::v2i64, Custom);
898 setOperationAction(ISD::SUB, MVT::v16i8, Legal);
899 setOperationAction(ISD::SUB, MVT::v8i16, Legal);
900 setOperationAction(ISD::SUB, MVT::v4i32, Legal);
901 setOperationAction(ISD::SUB, MVT::v2i64, Legal);
902 setOperationAction(ISD::MUL, MVT::v8i16, Legal);
903 setOperationAction(ISD::FADD, MVT::v2f64, Legal);
904 setOperationAction(ISD::FSUB, MVT::v2f64, Legal);
905 setOperationAction(ISD::FMUL, MVT::v2f64, Legal);
906 setOperationAction(ISD::FDIV, MVT::v2f64, Legal);
907 setOperationAction(ISD::FSQRT, MVT::v2f64, Legal);
908 setOperationAction(ISD::FNEG, MVT::v2f64, Custom);
909 setOperationAction(ISD::FABS, MVT::v2f64, Custom);
911 setOperationAction(ISD::SETCC, MVT::v2i64, Custom);
912 setOperationAction(ISD::SETCC, MVT::v16i8, Custom);
913 setOperationAction(ISD::SETCC, MVT::v8i16, Custom);
914 setOperationAction(ISD::SETCC, MVT::v4i32, Custom);
916 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16i8, Custom);
917 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i16, Custom);
918 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
919 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
920 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
922 // Custom lower build_vector, vector_shuffle, and extract_vector_elt.
923 for (int i = MVT::v16i8; i != MVT::v2i64; ++i) {
924 MVT VT = (MVT::SimpleValueType)i;
925 // Do not attempt to custom lower non-power-of-2 vectors
926 if (!isPowerOf2_32(VT.getVectorNumElements()))
928 // Do not attempt to custom lower non-128-bit vectors
929 if (!VT.is128BitVector())
931 setOperationAction(ISD::BUILD_VECTOR, VT, Custom);
932 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom);
933 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom);
936 setOperationAction(ISD::BUILD_VECTOR, MVT::v2f64, Custom);
937 setOperationAction(ISD::BUILD_VECTOR, MVT::v2i64, Custom);
938 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Custom);
939 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Custom);
940 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2f64, Custom);
941 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Custom);
943 if (Subtarget->is64Bit()) {
944 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Custom);
945 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
948 // Promote v16i8, v8i16, v4i32 load, select, and, or, xor to v2i64.
949 for (int i = MVT::v16i8; i != MVT::v2i64; ++i) {
950 MVT VT = (MVT::SimpleValueType)i;
952 // Do not attempt to promote non-128-bit vectors
953 if (!VT.is128BitVector())
956 setOperationAction(ISD::AND, VT, Promote);
957 AddPromotedToType (ISD::AND, VT, MVT::v2i64);
958 setOperationAction(ISD::OR, VT, Promote);
959 AddPromotedToType (ISD::OR, VT, MVT::v2i64);
960 setOperationAction(ISD::XOR, VT, Promote);
961 AddPromotedToType (ISD::XOR, VT, MVT::v2i64);
962 setOperationAction(ISD::LOAD, VT, Promote);
963 AddPromotedToType (ISD::LOAD, VT, MVT::v2i64);
964 setOperationAction(ISD::SELECT, VT, Promote);
965 AddPromotedToType (ISD::SELECT, VT, MVT::v2i64);
968 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
970 // Custom lower v2i64 and v2f64 selects.
971 setOperationAction(ISD::LOAD, MVT::v2f64, Legal);
972 setOperationAction(ISD::LOAD, MVT::v2i64, Legal);
973 setOperationAction(ISD::SELECT, MVT::v2f64, Custom);
974 setOperationAction(ISD::SELECT, MVT::v2i64, Custom);
976 setOperationAction(ISD::FP_TO_SINT, MVT::v4i32, Legal);
977 setOperationAction(ISD::SINT_TO_FP, MVT::v4i32, Legal);
979 setOperationAction(ISD::UINT_TO_FP, MVT::v4i8, Custom);
980 setOperationAction(ISD::UINT_TO_FP, MVT::v4i16, Custom);
981 // As there is no 64-bit GPR available, we need build a special custom
982 // sequence to convert from v2i32 to v2f32.
983 if (!Subtarget->is64Bit())
984 setOperationAction(ISD::UINT_TO_FP, MVT::v2f32, Custom);
986 setOperationAction(ISD::FP_EXTEND, MVT::v2f32, Custom);
987 setOperationAction(ISD::FP_ROUND, MVT::v2f32, Custom);
989 setLoadExtAction(ISD::EXTLOAD, MVT::v2f32, Legal);
992 if (Subtarget->hasSSE41()) {
993 setOperationAction(ISD::FFLOOR, MVT::f32, Legal);
994 setOperationAction(ISD::FCEIL, MVT::f32, Legal);
995 setOperationAction(ISD::FTRUNC, MVT::f32, Legal);
996 setOperationAction(ISD::FRINT, MVT::f32, Legal);
997 setOperationAction(ISD::FNEARBYINT, MVT::f32, Legal);
998 setOperationAction(ISD::FFLOOR, MVT::f64, Legal);
999 setOperationAction(ISD::FCEIL, MVT::f64, Legal);
1000 setOperationAction(ISD::FTRUNC, MVT::f64, Legal);
1001 setOperationAction(ISD::FRINT, MVT::f64, Legal);
1002 setOperationAction(ISD::FNEARBYINT, MVT::f64, Legal);
1004 setOperationAction(ISD::FFLOOR, MVT::v4f32, Legal);
1005 setOperationAction(ISD::FCEIL, MVT::v4f32, Legal);
1006 setOperationAction(ISD::FTRUNC, MVT::v4f32, Legal);
1007 setOperationAction(ISD::FRINT, MVT::v4f32, Legal);
1008 setOperationAction(ISD::FNEARBYINT, MVT::v4f32, Legal);
1009 setOperationAction(ISD::FFLOOR, MVT::v2f64, Legal);
1010 setOperationAction(ISD::FCEIL, MVT::v2f64, Legal);
1011 setOperationAction(ISD::FTRUNC, MVT::v2f64, Legal);
1012 setOperationAction(ISD::FRINT, MVT::v2f64, Legal);
1013 setOperationAction(ISD::FNEARBYINT, MVT::v2f64, Legal);
1015 // FIXME: Do we need to handle scalar-to-vector here?
1016 setOperationAction(ISD::MUL, MVT::v4i32, Legal);
1018 setOperationAction(ISD::VSELECT, MVT::v2f64, Legal);
1019 setOperationAction(ISD::VSELECT, MVT::v2i64, Legal);
1020 setOperationAction(ISD::VSELECT, MVT::v16i8, Legal);
1021 setOperationAction(ISD::VSELECT, MVT::v4i32, Legal);
1022 setOperationAction(ISD::VSELECT, MVT::v4f32, Legal);
1024 // i8 and i16 vectors are custom , because the source register and source
1025 // source memory operand types are not the same width. f32 vectors are
1026 // custom since the immediate controlling the insert encodes additional
1028 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i8, Custom);
1029 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
1030 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
1031 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
1033 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v16i8, Custom);
1034 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v8i16, Custom);
1035 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4i32, Custom);
1036 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
1038 // FIXME: these should be Legal but thats only for the case where
1039 // the index is constant. For now custom expand to deal with that.
1040 if (Subtarget->is64Bit()) {
1041 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Custom);
1042 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
1046 if (Subtarget->hasSSE2()) {
1047 setOperationAction(ISD::SRL, MVT::v8i16, Custom);
1048 setOperationAction(ISD::SRL, MVT::v16i8, Custom);
1050 setOperationAction(ISD::SHL, MVT::v8i16, Custom);
1051 setOperationAction(ISD::SHL, MVT::v16i8, Custom);
1053 setOperationAction(ISD::SRA, MVT::v8i16, Custom);
1054 setOperationAction(ISD::SRA, MVT::v16i8, Custom);
1056 // In the customized shift lowering, the legal cases in AVX2 will be
1058 setOperationAction(ISD::SRL, MVT::v2i64, Custom);
1059 setOperationAction(ISD::SRL, MVT::v4i32, Custom);
1061 setOperationAction(ISD::SHL, MVT::v2i64, Custom);
1062 setOperationAction(ISD::SHL, MVT::v4i32, Custom);
1064 setOperationAction(ISD::SRA, MVT::v4i32, Custom);
1066 setOperationAction(ISD::SDIV, MVT::v8i16, Custom);
1067 setOperationAction(ISD::SDIV, MVT::v4i32, Custom);
1070 if (!TM.Options.UseSoftFloat && Subtarget->hasFp256()) {
1071 addRegisterClass(MVT::v32i8, &X86::VR256RegClass);
1072 addRegisterClass(MVT::v16i16, &X86::VR256RegClass);
1073 addRegisterClass(MVT::v8i32, &X86::VR256RegClass);
1074 addRegisterClass(MVT::v8f32, &X86::VR256RegClass);
1075 addRegisterClass(MVT::v4i64, &X86::VR256RegClass);
1076 addRegisterClass(MVT::v4f64, &X86::VR256RegClass);
1078 setOperationAction(ISD::LOAD, MVT::v8f32, Legal);
1079 setOperationAction(ISD::LOAD, MVT::v4f64, Legal);
1080 setOperationAction(ISD::LOAD, MVT::v4i64, Legal);
1082 setOperationAction(ISD::FADD, MVT::v8f32, Legal);
1083 setOperationAction(ISD::FSUB, MVT::v8f32, Legal);
1084 setOperationAction(ISD::FMUL, MVT::v8f32, Legal);
1085 setOperationAction(ISD::FDIV, MVT::v8f32, Legal);
1086 setOperationAction(ISD::FSQRT, MVT::v8f32, Legal);
1087 setOperationAction(ISD::FFLOOR, MVT::v8f32, Legal);
1088 setOperationAction(ISD::FCEIL, MVT::v8f32, Legal);
1089 setOperationAction(ISD::FTRUNC, MVT::v8f32, Legal);
1090 setOperationAction(ISD::FRINT, MVT::v8f32, Legal);
1091 setOperationAction(ISD::FNEARBYINT, MVT::v8f32, Legal);
1092 setOperationAction(ISD::FNEG, MVT::v8f32, Custom);
1093 setOperationAction(ISD::FABS, MVT::v8f32, Custom);
1095 setOperationAction(ISD::FADD, MVT::v4f64, Legal);
1096 setOperationAction(ISD::FSUB, MVT::v4f64, Legal);
1097 setOperationAction(ISD::FMUL, MVT::v4f64, Legal);
1098 setOperationAction(ISD::FDIV, MVT::v4f64, Legal);
1099 setOperationAction(ISD::FSQRT, MVT::v4f64, Legal);
1100 setOperationAction(ISD::FFLOOR, MVT::v4f64, Legal);
1101 setOperationAction(ISD::FCEIL, MVT::v4f64, Legal);
1102 setOperationAction(ISD::FTRUNC, MVT::v4f64, Legal);
1103 setOperationAction(ISD::FRINT, MVT::v4f64, Legal);
1104 setOperationAction(ISD::FNEARBYINT, MVT::v4f64, Legal);
1105 setOperationAction(ISD::FNEG, MVT::v4f64, Custom);
1106 setOperationAction(ISD::FABS, MVT::v4f64, Custom);
1108 setOperationAction(ISD::TRUNCATE, MVT::v8i16, Custom);
1109 setOperationAction(ISD::TRUNCATE, MVT::v4i32, Custom);
1111 setOperationAction(ISD::FP_TO_SINT, MVT::v8i16, Custom);
1113 setOperationAction(ISD::FP_TO_SINT, MVT::v8i32, Legal);
1114 setOperationAction(ISD::SINT_TO_FP, MVT::v8i32, Legal);
1115 setOperationAction(ISD::FP_ROUND, MVT::v4f32, Legal);
1117 setOperationAction(ISD::ZERO_EXTEND, MVT::v8i32, Custom);
1118 setOperationAction(ISD::UINT_TO_FP, MVT::v8i8, Custom);
1119 setOperationAction(ISD::UINT_TO_FP, MVT::v8i16, Custom);
1121 setLoadExtAction(ISD::EXTLOAD, MVT::v4f32, Legal);
1123 setOperationAction(ISD::SRL, MVT::v16i16, Custom);
1124 setOperationAction(ISD::SRL, MVT::v32i8, Custom);
1126 setOperationAction(ISD::SHL, MVT::v16i16, Custom);
1127 setOperationAction(ISD::SHL, MVT::v32i8, Custom);
1129 setOperationAction(ISD::SRA, MVT::v16i16, Custom);
1130 setOperationAction(ISD::SRA, MVT::v32i8, Custom);
1132 setOperationAction(ISD::SDIV, MVT::v16i16, Custom);
1134 setOperationAction(ISD::SETCC, MVT::v32i8, Custom);
1135 setOperationAction(ISD::SETCC, MVT::v16i16, Custom);
1136 setOperationAction(ISD::SETCC, MVT::v8i32, Custom);
1137 setOperationAction(ISD::SETCC, MVT::v4i64, Custom);
1139 setOperationAction(ISD::SELECT, MVT::v4f64, Custom);
1140 setOperationAction(ISD::SELECT, MVT::v4i64, Custom);
1141 setOperationAction(ISD::SELECT, MVT::v8f32, Custom);
1143 setOperationAction(ISD::VSELECT, MVT::v4f64, Legal);
1144 setOperationAction(ISD::VSELECT, MVT::v4i64, Legal);
1145 setOperationAction(ISD::VSELECT, MVT::v8i32, Legal);
1146 setOperationAction(ISD::VSELECT, MVT::v8f32, Legal);
1148 setOperationAction(ISD::SIGN_EXTEND, MVT::v4i64, Custom);
1149 setOperationAction(ISD::SIGN_EXTEND, MVT::v8i32, Custom);
1150 setOperationAction(ISD::ZERO_EXTEND, MVT::v4i64, Custom);
1151 setOperationAction(ISD::ZERO_EXTEND, MVT::v8i32, Custom);
1152 setOperationAction(ISD::ANY_EXTEND, MVT::v4i64, Custom);
1153 setOperationAction(ISD::ANY_EXTEND, MVT::v8i32, Custom);
1155 if (Subtarget->hasFMA() || Subtarget->hasFMA4()) {
1156 setOperationAction(ISD::FMA, MVT::v8f32, Legal);
1157 setOperationAction(ISD::FMA, MVT::v4f64, Legal);
1158 setOperationAction(ISD::FMA, MVT::v4f32, Legal);
1159 setOperationAction(ISD::FMA, MVT::v2f64, Legal);
1160 setOperationAction(ISD::FMA, MVT::f32, Legal);
1161 setOperationAction(ISD::FMA, MVT::f64, Legal);
1164 if (Subtarget->hasInt256()) {
1165 setOperationAction(ISD::ADD, MVT::v4i64, Legal);
1166 setOperationAction(ISD::ADD, MVT::v8i32, Legal);
1167 setOperationAction(ISD::ADD, MVT::v16i16, Legal);
1168 setOperationAction(ISD::ADD, MVT::v32i8, Legal);
1170 setOperationAction(ISD::SUB, MVT::v4i64, Legal);
1171 setOperationAction(ISD::SUB, MVT::v8i32, Legal);
1172 setOperationAction(ISD::SUB, MVT::v16i16, Legal);
1173 setOperationAction(ISD::SUB, MVT::v32i8, Legal);
1175 setOperationAction(ISD::MUL, MVT::v4i64, Custom);
1176 setOperationAction(ISD::MUL, MVT::v8i32, Legal);
1177 setOperationAction(ISD::MUL, MVT::v16i16, Legal);
1178 // Don't lower v32i8 because there is no 128-bit byte mul
1180 setOperationAction(ISD::VSELECT, MVT::v32i8, Legal);
1182 setOperationAction(ISD::SDIV, MVT::v8i32, Custom);
1184 setOperationAction(ISD::ADD, MVT::v4i64, Custom);
1185 setOperationAction(ISD::ADD, MVT::v8i32, Custom);
1186 setOperationAction(ISD::ADD, MVT::v16i16, Custom);
1187 setOperationAction(ISD::ADD, MVT::v32i8, Custom);
1189 setOperationAction(ISD::SUB, MVT::v4i64, Custom);
1190 setOperationAction(ISD::SUB, MVT::v8i32, Custom);
1191 setOperationAction(ISD::SUB, MVT::v16i16, Custom);
1192 setOperationAction(ISD::SUB, MVT::v32i8, Custom);
1194 setOperationAction(ISD::MUL, MVT::v4i64, Custom);
1195 setOperationAction(ISD::MUL, MVT::v8i32, Custom);
1196 setOperationAction(ISD::MUL, MVT::v16i16, Custom);
1197 // Don't lower v32i8 because there is no 128-bit byte mul
1200 // In the customized shift lowering, the legal cases in AVX2 will be
1202 setOperationAction(ISD::SRL, MVT::v4i64, Custom);
1203 setOperationAction(ISD::SRL, MVT::v8i32, Custom);
1205 setOperationAction(ISD::SHL, MVT::v4i64, Custom);
1206 setOperationAction(ISD::SHL, MVT::v8i32, Custom);
1208 setOperationAction(ISD::SRA, MVT::v8i32, Custom);
1210 // Custom lower several nodes for 256-bit types.
1211 for (int i = MVT::FIRST_VECTOR_VALUETYPE;
1212 i <= MVT::LAST_VECTOR_VALUETYPE; ++i) {
1213 MVT VT = (MVT::SimpleValueType)i;
1215 // Extract subvector is special because the value type
1216 // (result) is 128-bit but the source is 256-bit wide.
1217 if (VT.is128BitVector())
1218 setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Custom);
1220 // Do not attempt to custom lower other non-256-bit vectors
1221 if (!VT.is256BitVector())
1224 setOperationAction(ISD::BUILD_VECTOR, VT, Custom);
1225 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom);
1226 setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom);
1227 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom);
1228 setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Custom);
1229 setOperationAction(ISD::INSERT_SUBVECTOR, VT, Custom);
1230 setOperationAction(ISD::CONCAT_VECTORS, VT, Custom);
1233 // Promote v32i8, v16i16, v8i32 select, and, or, xor to v4i64.
1234 for (int i = MVT::v32i8; i != MVT::v4i64; ++i) {
1235 MVT VT = (MVT::SimpleValueType)i;
1237 // Do not attempt to promote non-256-bit vectors
1238 if (!VT.is256BitVector())
1241 setOperationAction(ISD::AND, VT, Promote);
1242 AddPromotedToType (ISD::AND, VT, MVT::v4i64);
1243 setOperationAction(ISD::OR, VT, Promote);
1244 AddPromotedToType (ISD::OR, VT, MVT::v4i64);
1245 setOperationAction(ISD::XOR, VT, Promote);
1246 AddPromotedToType (ISD::XOR, VT, MVT::v4i64);
1247 setOperationAction(ISD::LOAD, VT, Promote);
1248 AddPromotedToType (ISD::LOAD, VT, MVT::v4i64);
1249 setOperationAction(ISD::SELECT, VT, Promote);
1250 AddPromotedToType (ISD::SELECT, VT, MVT::v4i64);
1254 // SIGN_EXTEND_INREGs are evaluated by the extend type. Handle the expansion
1255 // of this type with custom code.
1256 for (int VT = MVT::FIRST_VECTOR_VALUETYPE;
1257 VT != MVT::LAST_VECTOR_VALUETYPE; VT++) {
1258 setOperationAction(ISD::SIGN_EXTEND_INREG, (MVT::SimpleValueType)VT,
1262 // We want to custom lower some of our intrinsics.
1263 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
1264 setOperationAction(ISD::INTRINSIC_W_CHAIN, MVT::Other, Custom);
1266 // Only custom-lower 64-bit SADDO and friends on 64-bit because we don't
1267 // handle type legalization for these operations here.
1269 // FIXME: We really should do custom legalization for addition and
1270 // subtraction on x86-32 once PR3203 is fixed. We really can't do much better
1271 // than generic legalization for 64-bit multiplication-with-overflow, though.
1272 for (unsigned i = 0, e = 3+Subtarget->is64Bit(); i != e; ++i) {
1273 // Add/Sub/Mul with overflow operations are custom lowered.
1275 setOperationAction(ISD::SADDO, VT, Custom);
1276 setOperationAction(ISD::UADDO, VT, Custom);
1277 setOperationAction(ISD::SSUBO, VT, Custom);
1278 setOperationAction(ISD::USUBO, VT, Custom);
1279 setOperationAction(ISD::SMULO, VT, Custom);
1280 setOperationAction(ISD::UMULO, VT, Custom);
1283 // There are no 8-bit 3-address imul/mul instructions
1284 setOperationAction(ISD::SMULO, MVT::i8, Expand);
1285 setOperationAction(ISD::UMULO, MVT::i8, Expand);
1287 if (!Subtarget->is64Bit()) {
1288 // These libcalls are not available in 32-bit.
1289 setLibcallName(RTLIB::SHL_I128, 0);
1290 setLibcallName(RTLIB::SRL_I128, 0);
1291 setLibcallName(RTLIB::SRA_I128, 0);
1294 // Combine sin / cos into one node or libcall if possible.
1295 if (Subtarget->hasSinCos()) {
1296 setLibcallName(RTLIB::SINCOS_F32, "sincosf");
1297 setLibcallName(RTLIB::SINCOS_F64, "sincos");
1298 if (Subtarget->isTargetDarwin()) {
1299 // For MacOSX, we don't want to the normal expansion of a libcall to
1300 // sincos. We want to issue a libcall to __sincos_stret to avoid memory
1302 setOperationAction(ISD::FSINCOS, MVT::f64, Custom);
1303 setOperationAction(ISD::FSINCOS, MVT::f32, Custom);
1307 // We have target-specific dag combine patterns for the following nodes:
1308 setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
1309 setTargetDAGCombine(ISD::EXTRACT_VECTOR_ELT);
1310 setTargetDAGCombine(ISD::VSELECT);
1311 setTargetDAGCombine(ISD::SELECT);
1312 setTargetDAGCombine(ISD::SHL);
1313 setTargetDAGCombine(ISD::SRA);
1314 setTargetDAGCombine(ISD::SRL);
1315 setTargetDAGCombine(ISD::OR);
1316 setTargetDAGCombine(ISD::AND);
1317 setTargetDAGCombine(ISD::ADD);
1318 setTargetDAGCombine(ISD::FADD);
1319 setTargetDAGCombine(ISD::FSUB);
1320 setTargetDAGCombine(ISD::FMA);
1321 setTargetDAGCombine(ISD::SUB);
1322 setTargetDAGCombine(ISD::LOAD);
1323 setTargetDAGCombine(ISD::STORE);
1324 setTargetDAGCombine(ISD::ZERO_EXTEND);
1325 setTargetDAGCombine(ISD::ANY_EXTEND);
1326 setTargetDAGCombine(ISD::SIGN_EXTEND);
1327 setTargetDAGCombine(ISD::SIGN_EXTEND_INREG);
1328 setTargetDAGCombine(ISD::TRUNCATE);
1329 setTargetDAGCombine(ISD::SINT_TO_FP);
1330 setTargetDAGCombine(ISD::SETCC);
1331 if (Subtarget->is64Bit())
1332 setTargetDAGCombine(ISD::MUL);
1333 setTargetDAGCombine(ISD::XOR);
1335 computeRegisterProperties();
1337 // On Darwin, -Os means optimize for size without hurting performance,
1338 // do not reduce the limit.
1339 MaxStoresPerMemset = 16; // For @llvm.memset -> sequence of stores
1340 MaxStoresPerMemsetOptSize = Subtarget->isTargetDarwin() ? 16 : 8;
1341 MaxStoresPerMemcpy = 8; // For @llvm.memcpy -> sequence of stores
1342 MaxStoresPerMemcpyOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
1343 MaxStoresPerMemmove = 8; // For @llvm.memmove -> sequence of stores
1344 MaxStoresPerMemmoveOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
1345 setPrefLoopAlignment(4); // 2^4 bytes.
1346 BenefitFromCodePlacementOpt = true;
1348 // Predictable cmov don't hurt on atom because it's in-order.
1349 PredictableSelectIsExpensive = !Subtarget->isAtom();
1351 setPrefFunctionAlignment(4); // 2^4 bytes.
1354 EVT X86TargetLowering::getSetCCResultType(EVT VT) const {
1355 if (!VT.isVector()) return MVT::i8;
1356 return VT.changeVectorElementTypeToInteger();
1359 /// getMaxByValAlign - Helper for getByValTypeAlignment to determine
1360 /// the desired ByVal argument alignment.
1361 static void getMaxByValAlign(Type *Ty, unsigned &MaxAlign) {
1364 if (VectorType *VTy = dyn_cast<VectorType>(Ty)) {
1365 if (VTy->getBitWidth() == 128)
1367 } else if (ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
1368 unsigned EltAlign = 0;
1369 getMaxByValAlign(ATy->getElementType(), EltAlign);
1370 if (EltAlign > MaxAlign)
1371 MaxAlign = EltAlign;
1372 } else if (StructType *STy = dyn_cast<StructType>(Ty)) {
1373 for (unsigned i = 0, e = STy->getNumElements(); i != e; ++i) {
1374 unsigned EltAlign = 0;
1375 getMaxByValAlign(STy->getElementType(i), EltAlign);
1376 if (EltAlign > MaxAlign)
1377 MaxAlign = EltAlign;
1384 /// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
1385 /// function arguments in the caller parameter area. For X86, aggregates
1386 /// that contain SSE vectors are placed at 16-byte boundaries while the rest
1387 /// are at 4-byte boundaries.
1388 unsigned X86TargetLowering::getByValTypeAlignment(Type *Ty) const {
1389 if (Subtarget->is64Bit()) {
1390 // Max of 8 and alignment of type.
1391 unsigned TyAlign = TD->getABITypeAlignment(Ty);
1398 if (Subtarget->hasSSE1())
1399 getMaxByValAlign(Ty, Align);
1403 /// getOptimalMemOpType - Returns the target specific optimal type for load
1404 /// and store operations as a result of memset, memcpy, and memmove
1405 /// lowering. If DstAlign is zero that means it's safe to destination
1406 /// alignment can satisfy any constraint. Similarly if SrcAlign is zero it
1407 /// means there isn't a need to check it against alignment requirement,
1408 /// probably because the source does not need to be loaded. If 'IsMemset' is
1409 /// true, that means it's expanding a memset. If 'ZeroMemset' is true, that
1410 /// means it's a memset of zero. 'MemcpyStrSrc' indicates whether the memcpy
1411 /// source is constant so it does not need to be loaded.
1412 /// It returns EVT::Other if the type should be determined using generic
1413 /// target-independent logic.
1415 X86TargetLowering::getOptimalMemOpType(uint64_t Size,
1416 unsigned DstAlign, unsigned SrcAlign,
1417 bool IsMemset, bool ZeroMemset,
1419 MachineFunction &MF) const {
1420 const Function *F = MF.getFunction();
1421 if ((!IsMemset || ZeroMemset) &&
1422 !F->getAttributes().hasAttribute(AttributeSet::FunctionIndex,
1423 Attribute::NoImplicitFloat)) {
1425 (Subtarget->isUnalignedMemAccessFast() ||
1426 ((DstAlign == 0 || DstAlign >= 16) &&
1427 (SrcAlign == 0 || SrcAlign >= 16)))) {
1429 if (Subtarget->hasInt256())
1431 if (Subtarget->hasFp256())
1434 if (Subtarget->hasSSE2())
1436 if (Subtarget->hasSSE1())
1438 } else if (!MemcpyStrSrc && Size >= 8 &&
1439 !Subtarget->is64Bit() &&
1440 Subtarget->hasSSE2()) {
1441 // Do not use f64 to lower memcpy if source is string constant. It's
1442 // better to use i32 to avoid the loads.
1446 if (Subtarget->is64Bit() && Size >= 8)
1451 bool X86TargetLowering::isSafeMemOpType(MVT VT) const {
1453 return X86ScalarSSEf32;
1454 else if (VT == MVT::f64)
1455 return X86ScalarSSEf64;
1460 X86TargetLowering::allowsUnalignedMemoryAccesses(EVT VT, bool *Fast) const {
1462 *Fast = Subtarget->isUnalignedMemAccessFast();
1466 /// getJumpTableEncoding - Return the entry encoding for a jump table in the
1467 /// current function. The returned value is a member of the
1468 /// MachineJumpTableInfo::JTEntryKind enum.
1469 unsigned X86TargetLowering::getJumpTableEncoding() const {
1470 // In GOT pic mode, each entry in the jump table is emitted as a @GOTOFF
1472 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1473 Subtarget->isPICStyleGOT())
1474 return MachineJumpTableInfo::EK_Custom32;
1476 // Otherwise, use the normal jump table encoding heuristics.
1477 return TargetLowering::getJumpTableEncoding();
1481 X86TargetLowering::LowerCustomJumpTableEntry(const MachineJumpTableInfo *MJTI,
1482 const MachineBasicBlock *MBB,
1483 unsigned uid,MCContext &Ctx) const{
1484 assert(getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1485 Subtarget->isPICStyleGOT());
1486 // In 32-bit ELF systems, our jump table entries are formed with @GOTOFF
1488 return MCSymbolRefExpr::Create(MBB->getSymbol(),
1489 MCSymbolRefExpr::VK_GOTOFF, Ctx);
1492 /// getPICJumpTableRelocaBase - Returns relocation base for the given PIC
1494 SDValue X86TargetLowering::getPICJumpTableRelocBase(SDValue Table,
1495 SelectionDAG &DAG) const {
1496 if (!Subtarget->is64Bit())
1497 // This doesn't have DebugLoc associated with it, but is not really the
1498 // same as a Register.
1499 return DAG.getNode(X86ISD::GlobalBaseReg, DebugLoc(), getPointerTy());
1503 /// getPICJumpTableRelocBaseExpr - This returns the relocation base for the
1504 /// given PIC jumptable, the same as getPICJumpTableRelocBase, but as an
1506 const MCExpr *X86TargetLowering::
1507 getPICJumpTableRelocBaseExpr(const MachineFunction *MF, unsigned JTI,
1508 MCContext &Ctx) const {
1509 // X86-64 uses RIP relative addressing based on the jump table label.
1510 if (Subtarget->isPICStyleRIPRel())
1511 return TargetLowering::getPICJumpTableRelocBaseExpr(MF, JTI, Ctx);
1513 // Otherwise, the reference is relative to the PIC base.
1514 return MCSymbolRefExpr::Create(MF->getPICBaseSymbol(), Ctx);
1517 // FIXME: Why this routine is here? Move to RegInfo!
1518 std::pair<const TargetRegisterClass*, uint8_t>
1519 X86TargetLowering::findRepresentativeClass(MVT VT) const{
1520 const TargetRegisterClass *RRC = 0;
1522 switch (VT.SimpleTy) {
1524 return TargetLowering::findRepresentativeClass(VT);
1525 case MVT::i8: case MVT::i16: case MVT::i32: case MVT::i64:
1526 RRC = Subtarget->is64Bit() ?
1527 (const TargetRegisterClass*)&X86::GR64RegClass :
1528 (const TargetRegisterClass*)&X86::GR32RegClass;
1531 RRC = &X86::VR64RegClass;
1533 case MVT::f32: case MVT::f64:
1534 case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64:
1535 case MVT::v4f32: case MVT::v2f64:
1536 case MVT::v32i8: case MVT::v8i32: case MVT::v4i64: case MVT::v8f32:
1538 RRC = &X86::VR128RegClass;
1541 return std::make_pair(RRC, Cost);
1544 bool X86TargetLowering::getStackCookieLocation(unsigned &AddressSpace,
1545 unsigned &Offset) const {
1546 if (!Subtarget->isTargetLinux())
1549 if (Subtarget->is64Bit()) {
1550 // %fs:0x28, unless we're using a Kernel code model, in which case it's %gs:
1552 if (getTargetMachine().getCodeModel() == CodeModel::Kernel)
1564 //===----------------------------------------------------------------------===//
1565 // Return Value Calling Convention Implementation
1566 //===----------------------------------------------------------------------===//
1568 #include "X86GenCallingConv.inc"
1571 X86TargetLowering::CanLowerReturn(CallingConv::ID CallConv,
1572 MachineFunction &MF, bool isVarArg,
1573 const SmallVectorImpl<ISD::OutputArg> &Outs,
1574 LLVMContext &Context) const {
1575 SmallVector<CCValAssign, 16> RVLocs;
1576 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
1578 return CCInfo.CheckReturn(Outs, RetCC_X86);
1582 X86TargetLowering::LowerReturn(SDValue Chain,
1583 CallingConv::ID CallConv, bool isVarArg,
1584 const SmallVectorImpl<ISD::OutputArg> &Outs,
1585 const SmallVectorImpl<SDValue> &OutVals,
1586 DebugLoc dl, SelectionDAG &DAG) const {
1587 MachineFunction &MF = DAG.getMachineFunction();
1588 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1590 SmallVector<CCValAssign, 16> RVLocs;
1591 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
1592 RVLocs, *DAG.getContext());
1593 CCInfo.AnalyzeReturn(Outs, RetCC_X86);
1596 SmallVector<SDValue, 6> RetOps;
1597 RetOps.push_back(Chain); // Operand #0 = Chain (updated below)
1598 // Operand #1 = Bytes To Pop
1599 RetOps.push_back(DAG.getTargetConstant(FuncInfo->getBytesToPopOnReturn(),
1602 // Copy the result values into the output registers.
1603 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1604 CCValAssign &VA = RVLocs[i];
1605 assert(VA.isRegLoc() && "Can only return in registers!");
1606 SDValue ValToCopy = OutVals[i];
1607 EVT ValVT = ValToCopy.getValueType();
1609 // Promote values to the appropriate types
1610 if (VA.getLocInfo() == CCValAssign::SExt)
1611 ValToCopy = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), ValToCopy);
1612 else if (VA.getLocInfo() == CCValAssign::ZExt)
1613 ValToCopy = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), ValToCopy);
1614 else if (VA.getLocInfo() == CCValAssign::AExt)
1615 ValToCopy = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), ValToCopy);
1616 else if (VA.getLocInfo() == CCValAssign::BCvt)
1617 ValToCopy = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), ValToCopy);
1619 // If this is x86-64, and we disabled SSE, we can't return FP values,
1620 // or SSE or MMX vectors.
1621 if ((ValVT == MVT::f32 || ValVT == MVT::f64 ||
1622 VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) &&
1623 (Subtarget->is64Bit() && !Subtarget->hasSSE1())) {
1624 report_fatal_error("SSE register return with SSE disabled");
1626 // Likewise we can't return F64 values with SSE1 only. gcc does so, but
1627 // llvm-gcc has never done it right and no one has noticed, so this
1628 // should be OK for now.
1629 if (ValVT == MVT::f64 &&
1630 (Subtarget->is64Bit() && !Subtarget->hasSSE2()))
1631 report_fatal_error("SSE2 register return with SSE2 disabled");
1633 // Returns in ST0/ST1 are handled specially: these are pushed as operands to
1634 // the RET instruction and handled by the FP Stackifier.
1635 if (VA.getLocReg() == X86::ST0 ||
1636 VA.getLocReg() == X86::ST1) {
1637 // If this is a copy from an xmm register to ST(0), use an FPExtend to
1638 // change the value to the FP stack register class.
1639 if (isScalarFPTypeInSSEReg(VA.getValVT()))
1640 ValToCopy = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f80, ValToCopy);
1641 RetOps.push_back(ValToCopy);
1642 // Don't emit a copytoreg.
1646 // 64-bit vector (MMX) values are returned in XMM0 / XMM1 except for v1i64
1647 // which is returned in RAX / RDX.
1648 if (Subtarget->is64Bit()) {
1649 if (ValVT == MVT::x86mmx) {
1650 if (VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) {
1651 ValToCopy = DAG.getNode(ISD::BITCAST, dl, MVT::i64, ValToCopy);
1652 ValToCopy = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64,
1654 // If we don't have SSE2 available, convert to v4f32 so the generated
1655 // register is legal.
1656 if (!Subtarget->hasSSE2())
1657 ValToCopy = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32,ValToCopy);
1662 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), ValToCopy, Flag);
1663 Flag = Chain.getValue(1);
1664 RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
1667 // The x86-64 ABIs require that for returning structs by value we copy
1668 // the sret argument into %rax/%eax (depending on ABI) for the return.
1669 // We saved the argument into a virtual register in the entry block,
1670 // so now we copy the value out and into %rax/%eax.
1671 if (Subtarget->is64Bit() &&
1672 DAG.getMachineFunction().getFunction()->hasStructRetAttr()) {
1673 MachineFunction &MF = DAG.getMachineFunction();
1674 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1675 unsigned Reg = FuncInfo->getSRetReturnReg();
1677 "SRetReturnReg should have been set in LowerFormalArguments().");
1678 SDValue Val = DAG.getCopyFromReg(Chain, dl, Reg, getPointerTy());
1680 unsigned RetValReg = Subtarget->isTarget64BitILP32() ? X86::EAX : X86::RAX;
1681 Chain = DAG.getCopyToReg(Chain, dl, RetValReg, Val, Flag);
1682 Flag = Chain.getValue(1);
1684 // RAX/EAX now acts like a return value.
1685 RetOps.push_back(DAG.getRegister(RetValReg, MVT::i64));
1688 RetOps[0] = Chain; // Update chain.
1690 // Add the flag if we have it.
1692 RetOps.push_back(Flag);
1694 return DAG.getNode(X86ISD::RET_FLAG, dl,
1695 MVT::Other, &RetOps[0], RetOps.size());
1698 bool X86TargetLowering::isUsedByReturnOnly(SDNode *N, SDValue &Chain) const {
1699 if (N->getNumValues() != 1)
1701 if (!N->hasNUsesOfValue(1, 0))
1704 SDValue TCChain = Chain;
1705 SDNode *Copy = *N->use_begin();
1706 if (Copy->getOpcode() == ISD::CopyToReg) {
1707 // If the copy has a glue operand, we conservatively assume it isn't safe to
1708 // perform a tail call.
1709 if (Copy->getOperand(Copy->getNumOperands()-1).getValueType() == MVT::Glue)
1711 TCChain = Copy->getOperand(0);
1712 } else if (Copy->getOpcode() != ISD::FP_EXTEND)
1715 bool HasRet = false;
1716 for (SDNode::use_iterator UI = Copy->use_begin(), UE = Copy->use_end();
1718 if (UI->getOpcode() != X86ISD::RET_FLAG)
1731 X86TargetLowering::getTypeForExtArgOrReturn(MVT VT,
1732 ISD::NodeType ExtendKind) const {
1734 // TODO: Is this also valid on 32-bit?
1735 if (Subtarget->is64Bit() && VT == MVT::i1 && ExtendKind == ISD::ZERO_EXTEND)
1736 ReturnMVT = MVT::i8;
1738 ReturnMVT = MVT::i32;
1740 MVT MinVT = getRegisterType(ReturnMVT);
1741 return VT.bitsLT(MinVT) ? MinVT : VT;
1744 /// LowerCallResult - Lower the result values of a call into the
1745 /// appropriate copies out of appropriate physical registers.
1748 X86TargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
1749 CallingConv::ID CallConv, bool isVarArg,
1750 const SmallVectorImpl<ISD::InputArg> &Ins,
1751 DebugLoc dl, SelectionDAG &DAG,
1752 SmallVectorImpl<SDValue> &InVals) const {
1754 // Assign locations to each value returned by this call.
1755 SmallVector<CCValAssign, 16> RVLocs;
1756 bool Is64Bit = Subtarget->is64Bit();
1757 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1758 getTargetMachine(), RVLocs, *DAG.getContext());
1759 CCInfo.AnalyzeCallResult(Ins, RetCC_X86);
1761 // Copy all of the result registers out of their specified physreg.
1762 for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) {
1763 CCValAssign &VA = RVLocs[i];
1764 EVT CopyVT = VA.getValVT();
1766 // If this is x86-64, and we disabled SSE, we can't return FP values
1767 if ((CopyVT == MVT::f32 || CopyVT == MVT::f64) &&
1768 ((Is64Bit || Ins[i].Flags.isInReg()) && !Subtarget->hasSSE1())) {
1769 report_fatal_error("SSE register return with SSE disabled");
1774 // If this is a call to a function that returns an fp value on the floating
1775 // point stack, we must guarantee the value is popped from the stack, so
1776 // a CopyFromReg is not good enough - the copy instruction may be eliminated
1777 // if the return value is not used. We use the FpPOP_RETVAL instruction
1779 if (VA.getLocReg() == X86::ST0 || VA.getLocReg() == X86::ST1) {
1780 // If we prefer to use the value in xmm registers, copy it out as f80 and
1781 // use a truncate to move it from fp stack reg to xmm reg.
1782 if (isScalarFPTypeInSSEReg(VA.getValVT())) CopyVT = MVT::f80;
1783 SDValue Ops[] = { Chain, InFlag };
1784 Chain = SDValue(DAG.getMachineNode(X86::FpPOP_RETVAL, dl, CopyVT,
1785 MVT::Other, MVT::Glue, Ops, 2), 1);
1786 Val = Chain.getValue(0);
1788 // Round the f80 to the right size, which also moves it to the appropriate
1790 if (CopyVT != VA.getValVT())
1791 Val = DAG.getNode(ISD::FP_ROUND, dl, VA.getValVT(), Val,
1792 // This truncation won't change the value.
1793 DAG.getIntPtrConstant(1));
1795 Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
1796 CopyVT, InFlag).getValue(1);
1797 Val = Chain.getValue(0);
1799 InFlag = Chain.getValue(2);
1800 InVals.push_back(Val);
1806 //===----------------------------------------------------------------------===//
1807 // C & StdCall & Fast Calling Convention implementation
1808 //===----------------------------------------------------------------------===//
1809 // StdCall calling convention seems to be standard for many Windows' API
1810 // routines and around. It differs from C calling convention just a little:
1811 // callee should clean up the stack, not caller. Symbols should be also
1812 // decorated in some fancy way :) It doesn't support any vector arguments.
1813 // For info on fast calling convention see Fast Calling Convention (tail call)
1814 // implementation LowerX86_32FastCCCallTo.
1816 /// CallIsStructReturn - Determines whether a call uses struct return
1818 enum StructReturnType {
1823 static StructReturnType
1824 callIsStructReturn(const SmallVectorImpl<ISD::OutputArg> &Outs) {
1826 return NotStructReturn;
1828 const ISD::ArgFlagsTy &Flags = Outs[0].Flags;
1829 if (!Flags.isSRet())
1830 return NotStructReturn;
1831 if (Flags.isInReg())
1832 return RegStructReturn;
1833 return StackStructReturn;
1836 /// ArgsAreStructReturn - Determines whether a function uses struct
1837 /// return semantics.
1838 static StructReturnType
1839 argsAreStructReturn(const SmallVectorImpl<ISD::InputArg> &Ins) {
1841 return NotStructReturn;
1843 const ISD::ArgFlagsTy &Flags = Ins[0].Flags;
1844 if (!Flags.isSRet())
1845 return NotStructReturn;
1846 if (Flags.isInReg())
1847 return RegStructReturn;
1848 return StackStructReturn;
1851 /// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
1852 /// by "Src" to address "Dst" with size and alignment information specified by
1853 /// the specific parameter attribute. The copy will be passed as a byval
1854 /// function parameter.
1856 CreateCopyOfByValArgument(SDValue Src, SDValue Dst, SDValue Chain,
1857 ISD::ArgFlagsTy Flags, SelectionDAG &DAG,
1859 SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), MVT::i32);
1861 return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
1862 /*isVolatile*/false, /*AlwaysInline=*/true,
1863 MachinePointerInfo(), MachinePointerInfo());
1866 /// IsTailCallConvention - Return true if the calling convention is one that
1867 /// supports tail call optimization.
1868 static bool IsTailCallConvention(CallingConv::ID CC) {
1869 return (CC == CallingConv::Fast || CC == CallingConv::GHC ||
1870 CC == CallingConv::HiPE);
1873 bool X86TargetLowering::mayBeEmittedAsTailCall(CallInst *CI) const {
1874 if (!CI->isTailCall() || getTargetMachine().Options.DisableTailCalls)
1878 CallingConv::ID CalleeCC = CS.getCallingConv();
1879 if (!IsTailCallConvention(CalleeCC) && CalleeCC != CallingConv::C)
1885 /// FuncIsMadeTailCallSafe - Return true if the function is being made into
1886 /// a tailcall target by changing its ABI.
1887 static bool FuncIsMadeTailCallSafe(CallingConv::ID CC,
1888 bool GuaranteedTailCallOpt) {
1889 return GuaranteedTailCallOpt && IsTailCallConvention(CC);
1893 X86TargetLowering::LowerMemArgument(SDValue Chain,
1894 CallingConv::ID CallConv,
1895 const SmallVectorImpl<ISD::InputArg> &Ins,
1896 DebugLoc dl, SelectionDAG &DAG,
1897 const CCValAssign &VA,
1898 MachineFrameInfo *MFI,
1900 // Create the nodes corresponding to a load from this parameter slot.
1901 ISD::ArgFlagsTy Flags = Ins[i].Flags;
1902 bool AlwaysUseMutable = FuncIsMadeTailCallSafe(CallConv,
1903 getTargetMachine().Options.GuaranteedTailCallOpt);
1904 bool isImmutable = !AlwaysUseMutable && !Flags.isByVal();
1907 // If value is passed by pointer we have address passed instead of the value
1909 if (VA.getLocInfo() == CCValAssign::Indirect)
1910 ValVT = VA.getLocVT();
1912 ValVT = VA.getValVT();
1914 // FIXME: For now, all byval parameter objects are marked mutable. This can be
1915 // changed with more analysis.
1916 // In case of tail call optimization mark all arguments mutable. Since they
1917 // could be overwritten by lowering of arguments in case of a tail call.
1918 if (Flags.isByVal()) {
1919 unsigned Bytes = Flags.getByValSize();
1920 if (Bytes == 0) Bytes = 1; // Don't create zero-sized stack objects.
1921 int FI = MFI->CreateFixedObject(Bytes, VA.getLocMemOffset(), isImmutable);
1922 return DAG.getFrameIndex(FI, getPointerTy());
1924 int FI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
1925 VA.getLocMemOffset(), isImmutable);
1926 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
1927 return DAG.getLoad(ValVT, dl, Chain, FIN,
1928 MachinePointerInfo::getFixedStack(FI),
1929 false, false, false, 0);
1934 X86TargetLowering::LowerFormalArguments(SDValue Chain,
1935 CallingConv::ID CallConv,
1937 const SmallVectorImpl<ISD::InputArg> &Ins,
1940 SmallVectorImpl<SDValue> &InVals)
1942 MachineFunction &MF = DAG.getMachineFunction();
1943 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1945 const Function* Fn = MF.getFunction();
1946 if (Fn->hasExternalLinkage() &&
1947 Subtarget->isTargetCygMing() &&
1948 Fn->getName() == "main")
1949 FuncInfo->setForceFramePointer(true);
1951 MachineFrameInfo *MFI = MF.getFrameInfo();
1952 bool Is64Bit = Subtarget->is64Bit();
1953 bool IsWindows = Subtarget->isTargetWindows();
1954 bool IsWin64 = Subtarget->isTargetWin64();
1956 assert(!(isVarArg && IsTailCallConvention(CallConv)) &&
1957 "Var args not supported with calling convention fastcc, ghc or hipe");
1959 // Assign locations to all of the incoming arguments.
1960 SmallVector<CCValAssign, 16> ArgLocs;
1961 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
1962 ArgLocs, *DAG.getContext());
1964 // Allocate shadow area for Win64
1966 CCInfo.AllocateStack(32, 8);
1969 CCInfo.AnalyzeFormalArguments(Ins, CC_X86);
1971 unsigned LastVal = ~0U;
1973 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
1974 CCValAssign &VA = ArgLocs[i];
1975 // TODO: If an arg is passed in two places (e.g. reg and stack), skip later
1977 assert(VA.getValNo() != LastVal &&
1978 "Don't support value assigned to multiple locs yet");
1980 LastVal = VA.getValNo();
1982 if (VA.isRegLoc()) {
1983 EVT RegVT = VA.getLocVT();
1984 const TargetRegisterClass *RC;
1985 if (RegVT == MVT::i32)
1986 RC = &X86::GR32RegClass;
1987 else if (Is64Bit && RegVT == MVT::i64)
1988 RC = &X86::GR64RegClass;
1989 else if (RegVT == MVT::f32)
1990 RC = &X86::FR32RegClass;
1991 else if (RegVT == MVT::f64)
1992 RC = &X86::FR64RegClass;
1993 else if (RegVT.is256BitVector())
1994 RC = &X86::VR256RegClass;
1995 else if (RegVT.is128BitVector())
1996 RC = &X86::VR128RegClass;
1997 else if (RegVT == MVT::x86mmx)
1998 RC = &X86::VR64RegClass;
2000 llvm_unreachable("Unknown argument type!");
2002 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
2003 ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
2005 // If this is an 8 or 16-bit value, it is really passed promoted to 32
2006 // bits. Insert an assert[sz]ext to capture this, then truncate to the
2008 if (VA.getLocInfo() == CCValAssign::SExt)
2009 ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue,
2010 DAG.getValueType(VA.getValVT()));
2011 else if (VA.getLocInfo() == CCValAssign::ZExt)
2012 ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue,
2013 DAG.getValueType(VA.getValVT()));
2014 else if (VA.getLocInfo() == CCValAssign::BCvt)
2015 ArgValue = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), ArgValue);
2017 if (VA.isExtInLoc()) {
2018 // Handle MMX values passed in XMM regs.
2019 if (RegVT.isVector())
2020 ArgValue = DAG.getNode(X86ISD::MOVDQ2Q, dl, VA.getValVT(), ArgValue);
2022 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
2025 assert(VA.isMemLoc());
2026 ArgValue = LowerMemArgument(Chain, CallConv, Ins, dl, DAG, VA, MFI, i);
2029 // If value is passed via pointer - do a load.
2030 if (VA.getLocInfo() == CCValAssign::Indirect)
2031 ArgValue = DAG.getLoad(VA.getValVT(), dl, Chain, ArgValue,
2032 MachinePointerInfo(), false, false, false, 0);
2034 InVals.push_back(ArgValue);
2037 // The x86-64 ABIs require that for returning structs by value we copy
2038 // the sret argument into %rax/%eax (depending on ABI) for the return.
2039 // Save the argument into a virtual register so that we can access it
2040 // from the return points.
2041 if (Is64Bit && MF.getFunction()->hasStructRetAttr()) {
2042 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
2043 unsigned Reg = FuncInfo->getSRetReturnReg();
2045 MVT PtrTy = getPointerTy();
2046 Reg = MF.getRegInfo().createVirtualRegister(getRegClassFor(PtrTy));
2047 FuncInfo->setSRetReturnReg(Reg);
2049 SDValue Copy = DAG.getCopyToReg(DAG.getEntryNode(), dl, Reg, InVals[0]);
2050 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Copy, Chain);
2053 unsigned StackSize = CCInfo.getNextStackOffset();
2054 // Align stack specially for tail calls.
2055 if (FuncIsMadeTailCallSafe(CallConv,
2056 MF.getTarget().Options.GuaranteedTailCallOpt))
2057 StackSize = GetAlignedArgumentStackSize(StackSize, DAG);
2059 // If the function takes variable number of arguments, make a frame index for
2060 // the start of the first vararg value... for expansion of llvm.va_start.
2062 if (Is64Bit || (CallConv != CallingConv::X86_FastCall &&
2063 CallConv != CallingConv::X86_ThisCall)) {
2064 FuncInfo->setVarArgsFrameIndex(MFI->CreateFixedObject(1, StackSize,true));
2067 unsigned TotalNumIntRegs = 0, TotalNumXMMRegs = 0;
2069 // FIXME: We should really autogenerate these arrays
2070 static const uint16_t GPR64ArgRegsWin64[] = {
2071 X86::RCX, X86::RDX, X86::R8, X86::R9
2073 static const uint16_t GPR64ArgRegs64Bit[] = {
2074 X86::RDI, X86::RSI, X86::RDX, X86::RCX, X86::R8, X86::R9
2076 static const uint16_t XMMArgRegs64Bit[] = {
2077 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
2078 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
2080 const uint16_t *GPR64ArgRegs;
2081 unsigned NumXMMRegs = 0;
2084 // The XMM registers which might contain var arg parameters are shadowed
2085 // in their paired GPR. So we only need to save the GPR to their home
2087 TotalNumIntRegs = 4;
2088 GPR64ArgRegs = GPR64ArgRegsWin64;
2090 TotalNumIntRegs = 6; TotalNumXMMRegs = 8;
2091 GPR64ArgRegs = GPR64ArgRegs64Bit;
2093 NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs64Bit,
2096 unsigned NumIntRegs = CCInfo.getFirstUnallocated(GPR64ArgRegs,
2099 bool NoImplicitFloatOps = Fn->getAttributes().
2100 hasAttribute(AttributeSet::FunctionIndex, Attribute::NoImplicitFloat);
2101 assert(!(NumXMMRegs && !Subtarget->hasSSE1()) &&
2102 "SSE register cannot be used when SSE is disabled!");
2103 assert(!(NumXMMRegs && MF.getTarget().Options.UseSoftFloat &&
2104 NoImplicitFloatOps) &&
2105 "SSE register cannot be used when SSE is disabled!");
2106 if (MF.getTarget().Options.UseSoftFloat || NoImplicitFloatOps ||
2107 !Subtarget->hasSSE1())
2108 // Kernel mode asks for SSE to be disabled, so don't push them
2110 TotalNumXMMRegs = 0;
2113 const TargetFrameLowering &TFI = *getTargetMachine().getFrameLowering();
2114 // Get to the caller-allocated home save location. Add 8 to account
2115 // for the return address.
2116 int HomeOffset = TFI.getOffsetOfLocalArea() + 8;
2117 FuncInfo->setRegSaveFrameIndex(
2118 MFI->CreateFixedObject(1, NumIntRegs * 8 + HomeOffset, false));
2119 // Fixup to set vararg frame on shadow area (4 x i64).
2121 FuncInfo->setVarArgsFrameIndex(FuncInfo->getRegSaveFrameIndex());
2123 // For X86-64, if there are vararg parameters that are passed via
2124 // registers, then we must store them to their spots on the stack so
2125 // they may be loaded by deferencing the result of va_next.
2126 FuncInfo->setVarArgsGPOffset(NumIntRegs * 8);
2127 FuncInfo->setVarArgsFPOffset(TotalNumIntRegs * 8 + NumXMMRegs * 16);
2128 FuncInfo->setRegSaveFrameIndex(
2129 MFI->CreateStackObject(TotalNumIntRegs * 8 + TotalNumXMMRegs * 16, 16,
2133 // Store the integer parameter registers.
2134 SmallVector<SDValue, 8> MemOps;
2135 SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(),
2137 unsigned Offset = FuncInfo->getVarArgsGPOffset();
2138 for (; NumIntRegs != TotalNumIntRegs; ++NumIntRegs) {
2139 SDValue FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), RSFIN,
2140 DAG.getIntPtrConstant(Offset));
2141 unsigned VReg = MF.addLiveIn(GPR64ArgRegs[NumIntRegs],
2142 &X86::GR64RegClass);
2143 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);
2145 DAG.getStore(Val.getValue(1), dl, Val, FIN,
2146 MachinePointerInfo::getFixedStack(
2147 FuncInfo->getRegSaveFrameIndex(), Offset),
2149 MemOps.push_back(Store);
2153 if (TotalNumXMMRegs != 0 && NumXMMRegs != TotalNumXMMRegs) {
2154 // Now store the XMM (fp + vector) parameter registers.
2155 SmallVector<SDValue, 11> SaveXMMOps;
2156 SaveXMMOps.push_back(Chain);
2158 unsigned AL = MF.addLiveIn(X86::AL, &X86::GR8RegClass);
2159 SDValue ALVal = DAG.getCopyFromReg(DAG.getEntryNode(), dl, AL, MVT::i8);
2160 SaveXMMOps.push_back(ALVal);
2162 SaveXMMOps.push_back(DAG.getIntPtrConstant(
2163 FuncInfo->getRegSaveFrameIndex()));
2164 SaveXMMOps.push_back(DAG.getIntPtrConstant(
2165 FuncInfo->getVarArgsFPOffset()));
2167 for (; NumXMMRegs != TotalNumXMMRegs; ++NumXMMRegs) {
2168 unsigned VReg = MF.addLiveIn(XMMArgRegs64Bit[NumXMMRegs],
2169 &X86::VR128RegClass);
2170 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::v4f32);
2171 SaveXMMOps.push_back(Val);
2173 MemOps.push_back(DAG.getNode(X86ISD::VASTART_SAVE_XMM_REGS, dl,
2175 &SaveXMMOps[0], SaveXMMOps.size()));
2178 if (!MemOps.empty())
2179 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2180 &MemOps[0], MemOps.size());
2184 // Some CCs need callee pop.
2185 if (X86::isCalleePop(CallConv, Is64Bit, isVarArg,
2186 MF.getTarget().Options.GuaranteedTailCallOpt)) {
2187 FuncInfo->setBytesToPopOnReturn(StackSize); // Callee pops everything.
2189 FuncInfo->setBytesToPopOnReturn(0); // Callee pops nothing.
2190 // If this is an sret function, the return should pop the hidden pointer.
2191 if (!Is64Bit && !IsTailCallConvention(CallConv) && !IsWindows &&
2192 argsAreStructReturn(Ins) == StackStructReturn)
2193 FuncInfo->setBytesToPopOnReturn(4);
2197 // RegSaveFrameIndex is X86-64 only.
2198 FuncInfo->setRegSaveFrameIndex(0xAAAAAAA);
2199 if (CallConv == CallingConv::X86_FastCall ||
2200 CallConv == CallingConv::X86_ThisCall)
2201 // fastcc functions can't have varargs.
2202 FuncInfo->setVarArgsFrameIndex(0xAAAAAAA);
2205 FuncInfo->setArgumentStackSize(StackSize);
2211 X86TargetLowering::LowerMemOpCallTo(SDValue Chain,
2212 SDValue StackPtr, SDValue Arg,
2213 DebugLoc dl, SelectionDAG &DAG,
2214 const CCValAssign &VA,
2215 ISD::ArgFlagsTy Flags) const {
2216 unsigned LocMemOffset = VA.getLocMemOffset();
2217 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
2218 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
2219 if (Flags.isByVal())
2220 return CreateCopyOfByValArgument(Arg, PtrOff, Chain, Flags, DAG, dl);
2222 return DAG.getStore(Chain, dl, Arg, PtrOff,
2223 MachinePointerInfo::getStack(LocMemOffset),
2227 /// EmitTailCallLoadRetAddr - Emit a load of return address if tail call
2228 /// optimization is performed and it is required.
2230 X86TargetLowering::EmitTailCallLoadRetAddr(SelectionDAG &DAG,
2231 SDValue &OutRetAddr, SDValue Chain,
2232 bool IsTailCall, bool Is64Bit,
2233 int FPDiff, DebugLoc dl) const {
2234 // Adjust the Return address stack slot.
2235 EVT VT = getPointerTy();
2236 OutRetAddr = getReturnAddressFrameIndex(DAG);
2238 // Load the "old" Return address.
2239 OutRetAddr = DAG.getLoad(VT, dl, Chain, OutRetAddr, MachinePointerInfo(),
2240 false, false, false, 0);
2241 return SDValue(OutRetAddr.getNode(), 1);
2244 /// EmitTailCallStoreRetAddr - Emit a store of the return address if tail call
2245 /// optimization is performed and it is required (FPDiff!=0).
2247 EmitTailCallStoreRetAddr(SelectionDAG & DAG, MachineFunction &MF,
2248 SDValue Chain, SDValue RetAddrFrIdx, EVT PtrVT,
2249 unsigned SlotSize, int FPDiff, DebugLoc dl) {
2250 // Store the return address to the appropriate stack slot.
2251 if (!FPDiff) return Chain;
2252 // Calculate the new stack slot for the return address.
2253 int NewReturnAddrFI =
2254 MF.getFrameInfo()->CreateFixedObject(SlotSize, FPDiff-SlotSize, false);
2255 SDValue NewRetAddrFrIdx = DAG.getFrameIndex(NewReturnAddrFI, PtrVT);
2256 Chain = DAG.getStore(Chain, dl, RetAddrFrIdx, NewRetAddrFrIdx,
2257 MachinePointerInfo::getFixedStack(NewReturnAddrFI),
2263 X86TargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
2264 SmallVectorImpl<SDValue> &InVals) const {
2265 SelectionDAG &DAG = CLI.DAG;
2266 DebugLoc &dl = CLI.DL;
2267 SmallVector<ISD::OutputArg, 32> &Outs = CLI.Outs;
2268 SmallVector<SDValue, 32> &OutVals = CLI.OutVals;
2269 SmallVector<ISD::InputArg, 32> &Ins = CLI.Ins;
2270 SDValue Chain = CLI.Chain;
2271 SDValue Callee = CLI.Callee;
2272 CallingConv::ID CallConv = CLI.CallConv;
2273 bool &isTailCall = CLI.IsTailCall;
2274 bool isVarArg = CLI.IsVarArg;
2276 MachineFunction &MF = DAG.getMachineFunction();
2277 bool Is64Bit = Subtarget->is64Bit();
2278 bool IsWin64 = Subtarget->isTargetWin64();
2279 bool IsWindows = Subtarget->isTargetWindows();
2280 StructReturnType SR = callIsStructReturn(Outs);
2281 bool IsSibcall = false;
2283 if (MF.getTarget().Options.DisableTailCalls)
2287 // Check if it's really possible to do a tail call.
2288 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv,
2289 isVarArg, SR != NotStructReturn,
2290 MF.getFunction()->hasStructRetAttr(), CLI.RetTy,
2291 Outs, OutVals, Ins, DAG);
2293 // Sibcalls are automatically detected tailcalls which do not require
2295 if (!MF.getTarget().Options.GuaranteedTailCallOpt && isTailCall)
2302 assert(!(isVarArg && IsTailCallConvention(CallConv)) &&
2303 "Var args not supported with calling convention fastcc, ghc or hipe");
2305 // Analyze operands of the call, assigning locations to each operand.
2306 SmallVector<CCValAssign, 16> ArgLocs;
2307 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
2308 ArgLocs, *DAG.getContext());
2310 // Allocate shadow area for Win64
2312 CCInfo.AllocateStack(32, 8);
2315 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2317 // Get a count of how many bytes are to be pushed on the stack.
2318 unsigned NumBytes = CCInfo.getNextStackOffset();
2320 // This is a sibcall. The memory operands are available in caller's
2321 // own caller's stack.
2323 else if (getTargetMachine().Options.GuaranteedTailCallOpt &&
2324 IsTailCallConvention(CallConv))
2325 NumBytes = GetAlignedArgumentStackSize(NumBytes, DAG);
2328 if (isTailCall && !IsSibcall) {
2329 // Lower arguments at fp - stackoffset + fpdiff.
2330 X86MachineFunctionInfo *X86Info = MF.getInfo<X86MachineFunctionInfo>();
2331 unsigned NumBytesCallerPushed = X86Info->getBytesToPopOnReturn();
2333 FPDiff = NumBytesCallerPushed - NumBytes;
2335 // Set the delta of movement of the returnaddr stackslot.
2336 // But only set if delta is greater than previous delta.
2337 if (FPDiff < X86Info->getTCReturnAddrDelta())
2338 X86Info->setTCReturnAddrDelta(FPDiff);
2342 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
2344 SDValue RetAddrFrIdx;
2345 // Load return address for tail calls.
2346 if (isTailCall && FPDiff)
2347 Chain = EmitTailCallLoadRetAddr(DAG, RetAddrFrIdx, Chain, isTailCall,
2348 Is64Bit, FPDiff, dl);
2350 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
2351 SmallVector<SDValue, 8> MemOpChains;
2354 // Walk the register/memloc assignments, inserting copies/loads. In the case
2355 // of tail call optimization arguments are handle later.
2356 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2357 CCValAssign &VA = ArgLocs[i];
2358 EVT RegVT = VA.getLocVT();
2359 SDValue Arg = OutVals[i];
2360 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2361 bool isByVal = Flags.isByVal();
2363 // Promote the value if needed.
2364 switch (VA.getLocInfo()) {
2365 default: llvm_unreachable("Unknown loc info!");
2366 case CCValAssign::Full: break;
2367 case CCValAssign::SExt:
2368 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, RegVT, Arg);
2370 case CCValAssign::ZExt:
2371 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, RegVT, Arg);
2373 case CCValAssign::AExt:
2374 if (RegVT.is128BitVector()) {
2375 // Special case: passing MMX values in XMM registers.
2376 Arg = DAG.getNode(ISD::BITCAST, dl, MVT::i64, Arg);
2377 Arg = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, Arg);
2378 Arg = getMOVL(DAG, dl, MVT::v2i64, DAG.getUNDEF(MVT::v2i64), Arg);
2380 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, RegVT, Arg);
2382 case CCValAssign::BCvt:
2383 Arg = DAG.getNode(ISD::BITCAST, dl, RegVT, Arg);
2385 case CCValAssign::Indirect: {
2386 // Store the argument.
2387 SDValue SpillSlot = DAG.CreateStackTemporary(VA.getValVT());
2388 int FI = cast<FrameIndexSDNode>(SpillSlot)->getIndex();
2389 Chain = DAG.getStore(Chain, dl, Arg, SpillSlot,
2390 MachinePointerInfo::getFixedStack(FI),
2397 if (VA.isRegLoc()) {
2398 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
2399 if (isVarArg && IsWin64) {
2400 // Win64 ABI requires argument XMM reg to be copied to the corresponding
2401 // shadow reg if callee is a varargs function.
2402 unsigned ShadowReg = 0;
2403 switch (VA.getLocReg()) {
2404 case X86::XMM0: ShadowReg = X86::RCX; break;
2405 case X86::XMM1: ShadowReg = X86::RDX; break;
2406 case X86::XMM2: ShadowReg = X86::R8; break;
2407 case X86::XMM3: ShadowReg = X86::R9; break;
2410 RegsToPass.push_back(std::make_pair(ShadowReg, Arg));
2412 } else if (!IsSibcall && (!isTailCall || isByVal)) {
2413 assert(VA.isMemLoc());
2414 if (StackPtr.getNode() == 0)
2415 StackPtr = DAG.getCopyFromReg(Chain, dl, RegInfo->getStackRegister(),
2417 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg,
2418 dl, DAG, VA, Flags));
2422 if (!MemOpChains.empty())
2423 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2424 &MemOpChains[0], MemOpChains.size());
2426 if (Subtarget->isPICStyleGOT()) {
2427 // ELF / PIC requires GOT in the EBX register before function calls via PLT
2430 RegsToPass.push_back(std::make_pair(unsigned(X86::EBX),
2431 DAG.getNode(X86ISD::GlobalBaseReg, DebugLoc(), getPointerTy())));
2433 // If we are tail calling and generating PIC/GOT style code load the
2434 // address of the callee into ECX. The value in ecx is used as target of
2435 // the tail jump. This is done to circumvent the ebx/callee-saved problem
2436 // for tail calls on PIC/GOT architectures. Normally we would just put the
2437 // address of GOT into ebx and then call target@PLT. But for tail calls
2438 // ebx would be restored (since ebx is callee saved) before jumping to the
2441 // Note: The actual moving to ECX is done further down.
2442 GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee);
2443 if (G && !G->getGlobal()->hasHiddenVisibility() &&
2444 !G->getGlobal()->hasProtectedVisibility())
2445 Callee = LowerGlobalAddress(Callee, DAG);
2446 else if (isa<ExternalSymbolSDNode>(Callee))
2447 Callee = LowerExternalSymbol(Callee, DAG);
2451 if (Is64Bit && isVarArg && !IsWin64) {
2452 // From AMD64 ABI document:
2453 // For calls that may call functions that use varargs or stdargs
2454 // (prototype-less calls or calls to functions containing ellipsis (...) in
2455 // the declaration) %al is used as hidden argument to specify the number
2456 // of SSE registers used. The contents of %al do not need to match exactly
2457 // the number of registers, but must be an ubound on the number of SSE
2458 // registers used and is in the range 0 - 8 inclusive.
2460 // Count the number of XMM registers allocated.
2461 static const uint16_t XMMArgRegs[] = {
2462 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
2463 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
2465 unsigned NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs, 8);
2466 assert((Subtarget->hasSSE1() || !NumXMMRegs)
2467 && "SSE registers cannot be used when SSE is disabled");
2469 RegsToPass.push_back(std::make_pair(unsigned(X86::AL),
2470 DAG.getConstant(NumXMMRegs, MVT::i8)));
2473 // For tail calls lower the arguments to the 'real' stack slot.
2475 // Force all the incoming stack arguments to be loaded from the stack
2476 // before any new outgoing arguments are stored to the stack, because the
2477 // outgoing stack slots may alias the incoming argument stack slots, and
2478 // the alias isn't otherwise explicit. This is slightly more conservative
2479 // than necessary, because it means that each store effectively depends
2480 // on every argument instead of just those arguments it would clobber.
2481 SDValue ArgChain = DAG.getStackArgumentTokenFactor(Chain);
2483 SmallVector<SDValue, 8> MemOpChains2;
2486 if (getTargetMachine().Options.GuaranteedTailCallOpt) {
2487 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2488 CCValAssign &VA = ArgLocs[i];
2491 assert(VA.isMemLoc());
2492 SDValue Arg = OutVals[i];
2493 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2494 // Create frame index.
2495 int32_t Offset = VA.getLocMemOffset()+FPDiff;
2496 uint32_t OpSize = (VA.getLocVT().getSizeInBits()+7)/8;
2497 FI = MF.getFrameInfo()->CreateFixedObject(OpSize, Offset, true);
2498 FIN = DAG.getFrameIndex(FI, getPointerTy());
2500 if (Flags.isByVal()) {
2501 // Copy relative to framepointer.
2502 SDValue Source = DAG.getIntPtrConstant(VA.getLocMemOffset());
2503 if (StackPtr.getNode() == 0)
2504 StackPtr = DAG.getCopyFromReg(Chain, dl,
2505 RegInfo->getStackRegister(),
2507 Source = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, Source);
2509 MemOpChains2.push_back(CreateCopyOfByValArgument(Source, FIN,
2513 // Store relative to framepointer.
2514 MemOpChains2.push_back(
2515 DAG.getStore(ArgChain, dl, Arg, FIN,
2516 MachinePointerInfo::getFixedStack(FI),
2522 if (!MemOpChains2.empty())
2523 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2524 &MemOpChains2[0], MemOpChains2.size());
2526 // Store the return address to the appropriate stack slot.
2527 Chain = EmitTailCallStoreRetAddr(DAG, MF, Chain, RetAddrFrIdx,
2528 getPointerTy(), RegInfo->getSlotSize(),
2532 // Build a sequence of copy-to-reg nodes chained together with token chain
2533 // and flag operands which copy the outgoing args into registers.
2535 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2536 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
2537 RegsToPass[i].second, InFlag);
2538 InFlag = Chain.getValue(1);
2541 if (getTargetMachine().getCodeModel() == CodeModel::Large) {
2542 assert(Is64Bit && "Large code model is only legal in 64-bit mode.");
2543 // In the 64-bit large code model, we have to make all calls
2544 // through a register, since the call instruction's 32-bit
2545 // pc-relative offset may not be large enough to hold the whole
2547 } else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2548 // If the callee is a GlobalAddress node (quite common, every direct call
2549 // is) turn it into a TargetGlobalAddress node so that legalize doesn't hack
2552 // We should use extra load for direct calls to dllimported functions in
2554 const GlobalValue *GV = G->getGlobal();
2555 if (!GV->hasDLLImportLinkage()) {
2556 unsigned char OpFlags = 0;
2557 bool ExtraLoad = false;
2558 unsigned WrapperKind = ISD::DELETED_NODE;
2560 // On ELF targets, in both X86-64 and X86-32 mode, direct calls to
2561 // external symbols most go through the PLT in PIC mode. If the symbol
2562 // has hidden or protected visibility, or if it is static or local, then
2563 // we don't need to use the PLT - we can directly call it.
2564 if (Subtarget->isTargetELF() &&
2565 getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
2566 GV->hasDefaultVisibility() && !GV->hasLocalLinkage()) {
2567 OpFlags = X86II::MO_PLT;
2568 } else if (Subtarget->isPICStyleStubAny() &&
2569 (GV->isDeclaration() || GV->isWeakForLinker()) &&
2570 (!Subtarget->getTargetTriple().isMacOSX() ||
2571 Subtarget->getTargetTriple().isMacOSXVersionLT(10, 5))) {
2572 // PC-relative references to external symbols should go through $stub,
2573 // unless we're building with the leopard linker or later, which
2574 // automatically synthesizes these stubs.
2575 OpFlags = X86II::MO_DARWIN_STUB;
2576 } else if (Subtarget->isPICStyleRIPRel() &&
2577 isa<Function>(GV) &&
2578 cast<Function>(GV)->getAttributes().
2579 hasAttribute(AttributeSet::FunctionIndex,
2580 Attribute::NonLazyBind)) {
2581 // If the function is marked as non-lazy, generate an indirect call
2582 // which loads from the GOT directly. This avoids runtime overhead
2583 // at the cost of eager binding (and one extra byte of encoding).
2584 OpFlags = X86II::MO_GOTPCREL;
2585 WrapperKind = X86ISD::WrapperRIP;
2589 Callee = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(),
2590 G->getOffset(), OpFlags);
2592 // Add a wrapper if needed.
2593 if (WrapperKind != ISD::DELETED_NODE)
2594 Callee = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Callee);
2595 // Add extra indirection if needed.
2597 Callee = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(), Callee,
2598 MachinePointerInfo::getGOT(),
2599 false, false, false, 0);
2601 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
2602 unsigned char OpFlags = 0;
2604 // On ELF targets, in either X86-64 or X86-32 mode, direct calls to
2605 // external symbols should go through the PLT.
2606 if (Subtarget->isTargetELF() &&
2607 getTargetMachine().getRelocationModel() == Reloc::PIC_) {
2608 OpFlags = X86II::MO_PLT;
2609 } else if (Subtarget->isPICStyleStubAny() &&
2610 (!Subtarget->getTargetTriple().isMacOSX() ||
2611 Subtarget->getTargetTriple().isMacOSXVersionLT(10, 5))) {
2612 // PC-relative references to external symbols should go through $stub,
2613 // unless we're building with the leopard linker or later, which
2614 // automatically synthesizes these stubs.
2615 OpFlags = X86II::MO_DARWIN_STUB;
2618 Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy(),
2622 // Returns a chain & a flag for retval copy to use.
2623 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
2624 SmallVector<SDValue, 8> Ops;
2626 if (!IsSibcall && isTailCall) {
2627 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
2628 DAG.getIntPtrConstant(0, true), InFlag);
2629 InFlag = Chain.getValue(1);
2632 Ops.push_back(Chain);
2633 Ops.push_back(Callee);
2636 Ops.push_back(DAG.getConstant(FPDiff, MVT::i32));
2638 // Add argument registers to the end of the list so that they are known live
2640 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
2641 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
2642 RegsToPass[i].second.getValueType()));
2644 // Add a register mask operand representing the call-preserved registers.
2645 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
2646 const uint32_t *Mask = TRI->getCallPreservedMask(CallConv);
2647 assert(Mask && "Missing call preserved mask for calling convention");
2648 Ops.push_back(DAG.getRegisterMask(Mask));
2650 if (InFlag.getNode())
2651 Ops.push_back(InFlag);
2655 //// If this is the first return lowered for this function, add the regs
2656 //// to the liveout set for the function.
2657 // This isn't right, although it's probably harmless on x86; liveouts
2658 // should be computed from returns not tail calls. Consider a void
2659 // function making a tail call to a function returning int.
2660 return DAG.getNode(X86ISD::TC_RETURN, dl, NodeTys, &Ops[0], Ops.size());
2663 Chain = DAG.getNode(X86ISD::CALL, dl, NodeTys, &Ops[0], Ops.size());
2664 InFlag = Chain.getValue(1);
2666 // Create the CALLSEQ_END node.
2667 unsigned NumBytesForCalleeToPush;
2668 if (X86::isCalleePop(CallConv, Is64Bit, isVarArg,
2669 getTargetMachine().Options.GuaranteedTailCallOpt))
2670 NumBytesForCalleeToPush = NumBytes; // Callee pops everything
2671 else if (!Is64Bit && !IsTailCallConvention(CallConv) && !IsWindows &&
2672 SR == StackStructReturn)
2673 // If this is a call to a struct-return function, the callee
2674 // pops the hidden struct pointer, so we have to push it back.
2675 // This is common for Darwin/X86, Linux & Mingw32 targets.
2676 // For MSVC Win32 targets, the caller pops the hidden struct pointer.
2677 NumBytesForCalleeToPush = 4;
2679 NumBytesForCalleeToPush = 0; // Callee pops nothing.
2681 // Returns a flag for retval copy to use.
2683 Chain = DAG.getCALLSEQ_END(Chain,
2684 DAG.getIntPtrConstant(NumBytes, true),
2685 DAG.getIntPtrConstant(NumBytesForCalleeToPush,
2688 InFlag = Chain.getValue(1);
2691 // Handle result values, copying them out of physregs into vregs that we
2693 return LowerCallResult(Chain, InFlag, CallConv, isVarArg,
2694 Ins, dl, DAG, InVals);
2697 //===----------------------------------------------------------------------===//
2698 // Fast Calling Convention (tail call) implementation
2699 //===----------------------------------------------------------------------===//
2701 // Like std call, callee cleans arguments, convention except that ECX is
2702 // reserved for storing the tail called function address. Only 2 registers are
2703 // free for argument passing (inreg). Tail call optimization is performed
2705 // * tailcallopt is enabled
2706 // * caller/callee are fastcc
2707 // On X86_64 architecture with GOT-style position independent code only local
2708 // (within module) calls are supported at the moment.
2709 // To keep the stack aligned according to platform abi the function
2710 // GetAlignedArgumentStackSize ensures that argument delta is always multiples
2711 // of stack alignment. (Dynamic linkers need this - darwin's dyld for example)
2712 // If a tail called function callee has more arguments than the caller the
2713 // caller needs to make sure that there is room to move the RETADDR to. This is
2714 // achieved by reserving an area the size of the argument delta right after the
2715 // original REtADDR, but before the saved framepointer or the spilled registers
2716 // e.g. caller(arg1, arg2) calls callee(arg1, arg2,arg3,arg4)
2728 /// GetAlignedArgumentStackSize - Make the stack size align e.g 16n + 12 aligned
2729 /// for a 16 byte align requirement.
2731 X86TargetLowering::GetAlignedArgumentStackSize(unsigned StackSize,
2732 SelectionDAG& DAG) const {
2733 MachineFunction &MF = DAG.getMachineFunction();
2734 const TargetMachine &TM = MF.getTarget();
2735 const TargetFrameLowering &TFI = *TM.getFrameLowering();
2736 unsigned StackAlignment = TFI.getStackAlignment();
2737 uint64_t AlignMask = StackAlignment - 1;
2738 int64_t Offset = StackSize;
2739 unsigned SlotSize = RegInfo->getSlotSize();
2740 if ( (Offset & AlignMask) <= (StackAlignment - SlotSize) ) {
2741 // Number smaller than 12 so just add the difference.
2742 Offset += ((StackAlignment - SlotSize) - (Offset & AlignMask));
2744 // Mask out lower bits, add stackalignment once plus the 12 bytes.
2745 Offset = ((~AlignMask) & Offset) + StackAlignment +
2746 (StackAlignment-SlotSize);
2751 /// MatchingStackOffset - Return true if the given stack call argument is
2752 /// already available in the same position (relatively) of the caller's
2753 /// incoming argument stack.
2755 bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags,
2756 MachineFrameInfo *MFI, const MachineRegisterInfo *MRI,
2757 const X86InstrInfo *TII) {
2758 unsigned Bytes = Arg.getValueType().getSizeInBits() / 8;
2760 if (Arg.getOpcode() == ISD::CopyFromReg) {
2761 unsigned VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg();
2762 if (!TargetRegisterInfo::isVirtualRegister(VR))
2764 MachineInstr *Def = MRI->getVRegDef(VR);
2767 if (!Flags.isByVal()) {
2768 if (!TII->isLoadFromStackSlot(Def, FI))
2771 unsigned Opcode = Def->getOpcode();
2772 if ((Opcode == X86::LEA32r || Opcode == X86::LEA64r) &&
2773 Def->getOperand(1).isFI()) {
2774 FI = Def->getOperand(1).getIndex();
2775 Bytes = Flags.getByValSize();
2779 } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) {
2780 if (Flags.isByVal())
2781 // ByVal argument is passed in as a pointer but it's now being
2782 // dereferenced. e.g.
2783 // define @foo(%struct.X* %A) {
2784 // tail call @bar(%struct.X* byval %A)
2787 SDValue Ptr = Ld->getBasePtr();
2788 FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr);
2791 FI = FINode->getIndex();
2792 } else if (Arg.getOpcode() == ISD::FrameIndex && Flags.isByVal()) {
2793 FrameIndexSDNode *FINode = cast<FrameIndexSDNode>(Arg);
2794 FI = FINode->getIndex();
2795 Bytes = Flags.getByValSize();
2799 assert(FI != INT_MAX);
2800 if (!MFI->isFixedObjectIndex(FI))
2802 return Offset == MFI->getObjectOffset(FI) && Bytes == MFI->getObjectSize(FI);
2805 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
2806 /// for tail call optimization. Targets which want to do tail call
2807 /// optimization should implement this function.
2809 X86TargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
2810 CallingConv::ID CalleeCC,
2812 bool isCalleeStructRet,
2813 bool isCallerStructRet,
2815 const SmallVectorImpl<ISD::OutputArg> &Outs,
2816 const SmallVectorImpl<SDValue> &OutVals,
2817 const SmallVectorImpl<ISD::InputArg> &Ins,
2818 SelectionDAG &DAG) const {
2819 if (!IsTailCallConvention(CalleeCC) &&
2820 CalleeCC != CallingConv::C)
2823 // If -tailcallopt is specified, make fastcc functions tail-callable.
2824 const MachineFunction &MF = DAG.getMachineFunction();
2825 const Function *CallerF = DAG.getMachineFunction().getFunction();
2827 // If the function return type is x86_fp80 and the callee return type is not,
2828 // then the FP_EXTEND of the call result is not a nop. It's not safe to
2829 // perform a tailcall optimization here.
2830 if (CallerF->getReturnType()->isX86_FP80Ty() && !RetTy->isX86_FP80Ty())
2833 CallingConv::ID CallerCC = CallerF->getCallingConv();
2834 bool CCMatch = CallerCC == CalleeCC;
2836 if (getTargetMachine().Options.GuaranteedTailCallOpt) {
2837 if (IsTailCallConvention(CalleeCC) && CCMatch)
2842 // Look for obvious safe cases to perform tail call optimization that do not
2843 // require ABI changes. This is what gcc calls sibcall.
2845 // Can't do sibcall if stack needs to be dynamically re-aligned. PEI needs to
2846 // emit a special epilogue.
2847 if (RegInfo->needsStackRealignment(MF))
2850 // Also avoid sibcall optimization if either caller or callee uses struct
2851 // return semantics.
2852 if (isCalleeStructRet || isCallerStructRet)
2855 // An stdcall caller is expected to clean up its arguments; the callee
2856 // isn't going to do that.
2857 if (!CCMatch && CallerCC == CallingConv::X86_StdCall)
2860 // Do not sibcall optimize vararg calls unless all arguments are passed via
2862 if (isVarArg && !Outs.empty()) {
2864 // Optimizing for varargs on Win64 is unlikely to be safe without
2865 // additional testing.
2866 if (Subtarget->isTargetWin64())
2869 SmallVector<CCValAssign, 16> ArgLocs;
2870 CCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
2871 getTargetMachine(), ArgLocs, *DAG.getContext());
2873 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2874 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i)
2875 if (!ArgLocs[i].isRegLoc())
2879 // If the call result is in ST0 / ST1, it needs to be popped off the x87
2880 // stack. Therefore, if it's not used by the call it is not safe to optimize
2881 // this into a sibcall.
2882 bool Unused = false;
2883 for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
2890 SmallVector<CCValAssign, 16> RVLocs;
2891 CCState CCInfo(CalleeCC, false, DAG.getMachineFunction(),
2892 getTargetMachine(), RVLocs, *DAG.getContext());
2893 CCInfo.AnalyzeCallResult(Ins, RetCC_X86);
2894 for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) {
2895 CCValAssign &VA = RVLocs[i];
2896 if (VA.getLocReg() == X86::ST0 || VA.getLocReg() == X86::ST1)
2901 // If the calling conventions do not match, then we'd better make sure the
2902 // results are returned in the same way as what the caller expects.
2904 SmallVector<CCValAssign, 16> RVLocs1;
2905 CCState CCInfo1(CalleeCC, false, DAG.getMachineFunction(),
2906 getTargetMachine(), RVLocs1, *DAG.getContext());
2907 CCInfo1.AnalyzeCallResult(Ins, RetCC_X86);
2909 SmallVector<CCValAssign, 16> RVLocs2;
2910 CCState CCInfo2(CallerCC, false, DAG.getMachineFunction(),
2911 getTargetMachine(), RVLocs2, *DAG.getContext());
2912 CCInfo2.AnalyzeCallResult(Ins, RetCC_X86);
2914 if (RVLocs1.size() != RVLocs2.size())
2916 for (unsigned i = 0, e = RVLocs1.size(); i != e; ++i) {
2917 if (RVLocs1[i].isRegLoc() != RVLocs2[i].isRegLoc())
2919 if (RVLocs1[i].getLocInfo() != RVLocs2[i].getLocInfo())
2921 if (RVLocs1[i].isRegLoc()) {
2922 if (RVLocs1[i].getLocReg() != RVLocs2[i].getLocReg())
2925 if (RVLocs1[i].getLocMemOffset() != RVLocs2[i].getLocMemOffset())
2931 // If the callee takes no arguments then go on to check the results of the
2933 if (!Outs.empty()) {
2934 // Check if stack adjustment is needed. For now, do not do this if any
2935 // argument is passed on the stack.
2936 SmallVector<CCValAssign, 16> ArgLocs;
2937 CCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
2938 getTargetMachine(), ArgLocs, *DAG.getContext());
2940 // Allocate shadow area for Win64
2941 if (Subtarget->isTargetWin64()) {
2942 CCInfo.AllocateStack(32, 8);
2945 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2946 if (CCInfo.getNextStackOffset()) {
2947 MachineFunction &MF = DAG.getMachineFunction();
2948 if (MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn())
2951 // Check if the arguments are already laid out in the right way as
2952 // the caller's fixed stack objects.
2953 MachineFrameInfo *MFI = MF.getFrameInfo();
2954 const MachineRegisterInfo *MRI = &MF.getRegInfo();
2955 const X86InstrInfo *TII =
2956 ((const X86TargetMachine&)getTargetMachine()).getInstrInfo();
2957 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2958 CCValAssign &VA = ArgLocs[i];
2959 SDValue Arg = OutVals[i];
2960 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2961 if (VA.getLocInfo() == CCValAssign::Indirect)
2963 if (!VA.isRegLoc()) {
2964 if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags,
2971 // If the tailcall address may be in a register, then make sure it's
2972 // possible to register allocate for it. In 32-bit, the call address can
2973 // only target EAX, EDX, or ECX since the tail call must be scheduled after
2974 // callee-saved registers are restored. These happen to be the same
2975 // registers used to pass 'inreg' arguments so watch out for those.
2976 if (!Subtarget->is64Bit() &&
2977 ((!isa<GlobalAddressSDNode>(Callee) &&
2978 !isa<ExternalSymbolSDNode>(Callee)) ||
2979 getTargetMachine().getRelocationModel() == Reloc::PIC_)) {
2980 unsigned NumInRegs = 0;
2981 // In PIC we need an extra register to formulate the address computation
2983 unsigned MaxInRegs =
2984 (getTargetMachine().getRelocationModel() == Reloc::PIC_) ? 2 : 3;
2986 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2987 CCValAssign &VA = ArgLocs[i];
2990 unsigned Reg = VA.getLocReg();
2993 case X86::EAX: case X86::EDX: case X86::ECX:
2994 if (++NumInRegs == MaxInRegs)
3006 X86TargetLowering::createFastISel(FunctionLoweringInfo &funcInfo,
3007 const TargetLibraryInfo *libInfo) const {
3008 return X86::createFastISel(funcInfo, libInfo);
3011 //===----------------------------------------------------------------------===//
3012 // Other Lowering Hooks
3013 //===----------------------------------------------------------------------===//
3015 static bool MayFoldLoad(SDValue Op) {
3016 return Op.hasOneUse() && ISD::isNormalLoad(Op.getNode());
3019 static bool MayFoldIntoStore(SDValue Op) {
3020 return Op.hasOneUse() && ISD::isNormalStore(*Op.getNode()->use_begin());
3023 static bool isTargetShuffle(unsigned Opcode) {
3025 default: return false;
3026 case X86ISD::PSHUFD:
3027 case X86ISD::PSHUFHW:
3028 case X86ISD::PSHUFLW:
3030 case X86ISD::PALIGNR:
3031 case X86ISD::MOVLHPS:
3032 case X86ISD::MOVLHPD:
3033 case X86ISD::MOVHLPS:
3034 case X86ISD::MOVLPS:
3035 case X86ISD::MOVLPD:
3036 case X86ISD::MOVSHDUP:
3037 case X86ISD::MOVSLDUP:
3038 case X86ISD::MOVDDUP:
3041 case X86ISD::UNPCKL:
3042 case X86ISD::UNPCKH:
3043 case X86ISD::VPERMILP:
3044 case X86ISD::VPERM2X128:
3045 case X86ISD::VPERMI:
3050 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
3051 SDValue V1, SelectionDAG &DAG) {
3053 default: llvm_unreachable("Unknown x86 shuffle node");
3054 case X86ISD::MOVSHDUP:
3055 case X86ISD::MOVSLDUP:
3056 case X86ISD::MOVDDUP:
3057 return DAG.getNode(Opc, dl, VT, V1);
3061 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
3062 SDValue V1, unsigned TargetMask,
3063 SelectionDAG &DAG) {
3065 default: llvm_unreachable("Unknown x86 shuffle node");
3066 case X86ISD::PSHUFD:
3067 case X86ISD::PSHUFHW:
3068 case X86ISD::PSHUFLW:
3069 case X86ISD::VPERMILP:
3070 case X86ISD::VPERMI:
3071 return DAG.getNode(Opc, dl, VT, V1, DAG.getConstant(TargetMask, MVT::i8));
3075 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
3076 SDValue V1, SDValue V2, unsigned TargetMask,
3077 SelectionDAG &DAG) {
3079 default: llvm_unreachable("Unknown x86 shuffle node");
3080 case X86ISD::PALIGNR:
3082 case X86ISD::VPERM2X128:
3083 return DAG.getNode(Opc, dl, VT, V1, V2,
3084 DAG.getConstant(TargetMask, MVT::i8));
3088 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
3089 SDValue V1, SDValue V2, SelectionDAG &DAG) {
3091 default: llvm_unreachable("Unknown x86 shuffle node");
3092 case X86ISD::MOVLHPS:
3093 case X86ISD::MOVLHPD:
3094 case X86ISD::MOVHLPS:
3095 case X86ISD::MOVLPS:
3096 case X86ISD::MOVLPD:
3099 case X86ISD::UNPCKL:
3100 case X86ISD::UNPCKH:
3101 return DAG.getNode(Opc, dl, VT, V1, V2);
3105 SDValue X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) const {
3106 MachineFunction &MF = DAG.getMachineFunction();
3107 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
3108 int ReturnAddrIndex = FuncInfo->getRAIndex();
3110 if (ReturnAddrIndex == 0) {
3111 // Set up a frame object for the return address.
3112 unsigned SlotSize = RegInfo->getSlotSize();
3113 ReturnAddrIndex = MF.getFrameInfo()->CreateFixedObject(SlotSize, -SlotSize,
3115 FuncInfo->setRAIndex(ReturnAddrIndex);
3118 return DAG.getFrameIndex(ReturnAddrIndex, getPointerTy());
3121 bool X86::isOffsetSuitableForCodeModel(int64_t Offset, CodeModel::Model M,
3122 bool hasSymbolicDisplacement) {
3123 // Offset should fit into 32 bit immediate field.
3124 if (!isInt<32>(Offset))
3127 // If we don't have a symbolic displacement - we don't have any extra
3129 if (!hasSymbolicDisplacement)
3132 // FIXME: Some tweaks might be needed for medium code model.
3133 if (M != CodeModel::Small && M != CodeModel::Kernel)
3136 // For small code model we assume that latest object is 16MB before end of 31
3137 // bits boundary. We may also accept pretty large negative constants knowing
3138 // that all objects are in the positive half of address space.
3139 if (M == CodeModel::Small && Offset < 16*1024*1024)
3142 // For kernel code model we know that all object resist in the negative half
3143 // of 32bits address space. We may not accept negative offsets, since they may
3144 // be just off and we may accept pretty large positive ones.
3145 if (M == CodeModel::Kernel && Offset > 0)
3151 /// isCalleePop - Determines whether the callee is required to pop its
3152 /// own arguments. Callee pop is necessary to support tail calls.
3153 bool X86::isCalleePop(CallingConv::ID CallingConv,
3154 bool is64Bit, bool IsVarArg, bool TailCallOpt) {
3158 switch (CallingConv) {
3161 case CallingConv::X86_StdCall:
3163 case CallingConv::X86_FastCall:
3165 case CallingConv::X86_ThisCall:
3167 case CallingConv::Fast:
3169 case CallingConv::GHC:
3171 case CallingConv::HiPE:
3176 /// TranslateX86CC - do a one to one translation of a ISD::CondCode to the X86
3177 /// specific condition code, returning the condition code and the LHS/RHS of the
3178 /// comparison to make.
3179 static unsigned TranslateX86CC(ISD::CondCode SetCCOpcode, bool isFP,
3180 SDValue &LHS, SDValue &RHS, SelectionDAG &DAG) {
3182 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS)) {
3183 if (SetCCOpcode == ISD::SETGT && RHSC->isAllOnesValue()) {
3184 // X > -1 -> X == 0, jump !sign.
3185 RHS = DAG.getConstant(0, RHS.getValueType());
3186 return X86::COND_NS;
3188 if (SetCCOpcode == ISD::SETLT && RHSC->isNullValue()) {
3189 // X < 0 -> X == 0, jump on sign.
3192 if (SetCCOpcode == ISD::SETLT && RHSC->getZExtValue() == 1) {
3194 RHS = DAG.getConstant(0, RHS.getValueType());
3195 return X86::COND_LE;
3199 switch (SetCCOpcode) {
3200 default: llvm_unreachable("Invalid integer condition!");
3201 case ISD::SETEQ: return X86::COND_E;
3202 case ISD::SETGT: return X86::COND_G;
3203 case ISD::SETGE: return X86::COND_GE;
3204 case ISD::SETLT: return X86::COND_L;
3205 case ISD::SETLE: return X86::COND_LE;
3206 case ISD::SETNE: return X86::COND_NE;
3207 case ISD::SETULT: return X86::COND_B;
3208 case ISD::SETUGT: return X86::COND_A;
3209 case ISD::SETULE: return X86::COND_BE;
3210 case ISD::SETUGE: return X86::COND_AE;
3214 // First determine if it is required or is profitable to flip the operands.
3216 // If LHS is a foldable load, but RHS is not, flip the condition.
3217 if (ISD::isNON_EXTLoad(LHS.getNode()) &&
3218 !ISD::isNON_EXTLoad(RHS.getNode())) {
3219 SetCCOpcode = getSetCCSwappedOperands(SetCCOpcode);
3220 std::swap(LHS, RHS);
3223 switch (SetCCOpcode) {
3229 std::swap(LHS, RHS);
3233 // On a floating point condition, the flags are set as follows:
3235 // 0 | 0 | 0 | X > Y
3236 // 0 | 0 | 1 | X < Y
3237 // 1 | 0 | 0 | X == Y
3238 // 1 | 1 | 1 | unordered
3239 switch (SetCCOpcode) {
3240 default: llvm_unreachable("Condcode should be pre-legalized away");
3242 case ISD::SETEQ: return X86::COND_E;
3243 case ISD::SETOLT: // flipped
3245 case ISD::SETGT: return X86::COND_A;
3246 case ISD::SETOLE: // flipped
3248 case ISD::SETGE: return X86::COND_AE;
3249 case ISD::SETUGT: // flipped
3251 case ISD::SETLT: return X86::COND_B;
3252 case ISD::SETUGE: // flipped
3254 case ISD::SETLE: return X86::COND_BE;
3256 case ISD::SETNE: return X86::COND_NE;
3257 case ISD::SETUO: return X86::COND_P;
3258 case ISD::SETO: return X86::COND_NP;
3260 case ISD::SETUNE: return X86::COND_INVALID;
3264 /// hasFPCMov - is there a floating point cmov for the specific X86 condition
3265 /// code. Current x86 isa includes the following FP cmov instructions:
3266 /// fcmovb, fcomvbe, fcomve, fcmovu, fcmovae, fcmova, fcmovne, fcmovnu.
3267 static bool hasFPCMov(unsigned X86CC) {
3283 /// isFPImmLegal - Returns true if the target can instruction select the
3284 /// specified FP immediate natively. If false, the legalizer will
3285 /// materialize the FP immediate as a load from a constant pool.
3286 bool X86TargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
3287 for (unsigned i = 0, e = LegalFPImmediates.size(); i != e; ++i) {
3288 if (Imm.bitwiseIsEqual(LegalFPImmediates[i]))
3294 /// isUndefOrInRange - Return true if Val is undef or if its value falls within
3295 /// the specified range (L, H].
3296 static bool isUndefOrInRange(int Val, int Low, int Hi) {
3297 return (Val < 0) || (Val >= Low && Val < Hi);
3300 /// isUndefOrEqual - Val is either less than zero (undef) or equal to the
3301 /// specified value.
3302 static bool isUndefOrEqual(int Val, int CmpVal) {
3303 return (Val < 0 || Val == CmpVal);
3306 /// isSequentialOrUndefInRange - Return true if every element in Mask, beginning
3307 /// from position Pos and ending in Pos+Size, falls within the specified
3308 /// sequential range (L, L+Pos]. or is undef.
3309 static bool isSequentialOrUndefInRange(ArrayRef<int> Mask,
3310 unsigned Pos, unsigned Size, int Low) {
3311 for (unsigned i = Pos, e = Pos+Size; i != e; ++i, ++Low)
3312 if (!isUndefOrEqual(Mask[i], Low))
3317 /// isPSHUFDMask - Return true if the node specifies a shuffle of elements that
3318 /// is suitable for input to PSHUFD or PSHUFW. That is, it doesn't reference
3319 /// the second operand.
3320 static bool isPSHUFDMask(ArrayRef<int> Mask, EVT VT) {
3321 if (VT == MVT::v4f32 || VT == MVT::v4i32 )
3322 return (Mask[0] < 4 && Mask[1] < 4 && Mask[2] < 4 && Mask[3] < 4);
3323 if (VT == MVT::v2f64 || VT == MVT::v2i64)
3324 return (Mask[0] < 2 && Mask[1] < 2);
3328 /// isPSHUFHWMask - Return true if the node specifies a shuffle of elements that
3329 /// is suitable for input to PSHUFHW.
3330 static bool isPSHUFHWMask(ArrayRef<int> Mask, EVT VT, bool HasInt256) {
3331 if (VT != MVT::v8i16 && (!HasInt256 || VT != MVT::v16i16))
3334 // Lower quadword copied in order or undef.
3335 if (!isSequentialOrUndefInRange(Mask, 0, 4, 0))
3338 // Upper quadword shuffled.
3339 for (unsigned i = 4; i != 8; ++i)
3340 if (!isUndefOrInRange(Mask[i], 4, 8))
3343 if (VT == MVT::v16i16) {
3344 // Lower quadword copied in order or undef.
3345 if (!isSequentialOrUndefInRange(Mask, 8, 4, 8))
3348 // Upper quadword shuffled.
3349 for (unsigned i = 12; i != 16; ++i)
3350 if (!isUndefOrInRange(Mask[i], 12, 16))
3357 /// isPSHUFLWMask - Return true if the node specifies a shuffle of elements that
3358 /// is suitable for input to PSHUFLW.
3359 static bool isPSHUFLWMask(ArrayRef<int> Mask, EVT VT, bool HasInt256) {
3360 if (VT != MVT::v8i16 && (!HasInt256 || VT != MVT::v16i16))
3363 // Upper quadword copied in order.
3364 if (!isSequentialOrUndefInRange(Mask, 4, 4, 4))
3367 // Lower quadword shuffled.
3368 for (unsigned i = 0; i != 4; ++i)
3369 if (!isUndefOrInRange(Mask[i], 0, 4))
3372 if (VT == MVT::v16i16) {
3373 // Upper quadword copied in order.
3374 if (!isSequentialOrUndefInRange(Mask, 12, 4, 12))
3377 // Lower quadword shuffled.
3378 for (unsigned i = 8; i != 12; ++i)
3379 if (!isUndefOrInRange(Mask[i], 8, 12))
3386 /// isPALIGNRMask - Return true if the node specifies a shuffle of elements that
3387 /// is suitable for input to PALIGNR.
3388 static bool isPALIGNRMask(ArrayRef<int> Mask, EVT VT,
3389 const X86Subtarget *Subtarget) {
3390 if ((VT.is128BitVector() && !Subtarget->hasSSSE3()) ||
3391 (VT.is256BitVector() && !Subtarget->hasInt256()))
3394 unsigned NumElts = VT.getVectorNumElements();
3395 unsigned NumLanes = VT.getSizeInBits()/128;
3396 unsigned NumLaneElts = NumElts/NumLanes;
3398 // Do not handle 64-bit element shuffles with palignr.
3399 if (NumLaneElts == 2)
3402 for (unsigned l = 0; l != NumElts; l+=NumLaneElts) {
3404 for (i = 0; i != NumLaneElts; ++i) {
3409 // Lane is all undef, go to next lane
3410 if (i == NumLaneElts)
3413 int Start = Mask[i+l];
3415 // Make sure its in this lane in one of the sources
3416 if (!isUndefOrInRange(Start, l, l+NumLaneElts) &&
3417 !isUndefOrInRange(Start, l+NumElts, l+NumElts+NumLaneElts))
3420 // If not lane 0, then we must match lane 0
3421 if (l != 0 && Mask[i] >= 0 && !isUndefOrEqual(Start, Mask[i]+l))
3424 // Correct second source to be contiguous with first source
3425 if (Start >= (int)NumElts)
3426 Start -= NumElts - NumLaneElts;
3428 // Make sure we're shifting in the right direction.
3429 if (Start <= (int)(i+l))
3434 // Check the rest of the elements to see if they are consecutive.
3435 for (++i; i != NumLaneElts; ++i) {
3436 int Idx = Mask[i+l];
3438 // Make sure its in this lane
3439 if (!isUndefOrInRange(Idx, l, l+NumLaneElts) &&
3440 !isUndefOrInRange(Idx, l+NumElts, l+NumElts+NumLaneElts))
3443 // If not lane 0, then we must match lane 0
3444 if (l != 0 && Mask[i] >= 0 && !isUndefOrEqual(Idx, Mask[i]+l))
3447 if (Idx >= (int)NumElts)
3448 Idx -= NumElts - NumLaneElts;
3450 if (!isUndefOrEqual(Idx, Start+i))
3459 /// CommuteVectorShuffleMask - Change values in a shuffle permute mask assuming
3460 /// the two vector operands have swapped position.
3461 static void CommuteVectorShuffleMask(SmallVectorImpl<int> &Mask,
3462 unsigned NumElems) {
3463 for (unsigned i = 0; i != NumElems; ++i) {
3467 else if (idx < (int)NumElems)
3468 Mask[i] = idx + NumElems;
3470 Mask[i] = idx - NumElems;
3474 /// isSHUFPMask - Return true if the specified VECTOR_SHUFFLE operand
3475 /// specifies a shuffle of elements that is suitable for input to 128/256-bit
3476 /// SHUFPS and SHUFPD. If Commuted is true, then it checks for sources to be
3477 /// reverse of what x86 shuffles want.
3478 static bool isSHUFPMask(ArrayRef<int> Mask, EVT VT, bool HasFp256,
3479 bool Commuted = false) {
3480 if (!HasFp256 && VT.is256BitVector())
3483 unsigned NumElems = VT.getVectorNumElements();
3484 unsigned NumLanes = VT.getSizeInBits()/128;
3485 unsigned NumLaneElems = NumElems/NumLanes;
3487 if (NumLaneElems != 2 && NumLaneElems != 4)
3490 // VSHUFPSY divides the resulting vector into 4 chunks.
3491 // The sources are also splitted into 4 chunks, and each destination
3492 // chunk must come from a different source chunk.
3494 // SRC1 => X7 X6 X5 X4 X3 X2 X1 X0
3495 // SRC2 => Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y9
3497 // DST => Y7..Y4, Y7..Y4, X7..X4, X7..X4,
3498 // Y3..Y0, Y3..Y0, X3..X0, X3..X0
3500 // VSHUFPDY divides the resulting vector into 4 chunks.
3501 // The sources are also splitted into 4 chunks, and each destination
3502 // chunk must come from a different source chunk.
3504 // SRC1 => X3 X2 X1 X0
3505 // SRC2 => Y3 Y2 Y1 Y0
3507 // DST => Y3..Y2, X3..X2, Y1..Y0, X1..X0
3509 unsigned HalfLaneElems = NumLaneElems/2;
3510 for (unsigned l = 0; l != NumElems; l += NumLaneElems) {
3511 for (unsigned i = 0; i != NumLaneElems; ++i) {
3512 int Idx = Mask[i+l];
3513 unsigned RngStart = l + ((Commuted == (i<HalfLaneElems)) ? NumElems : 0);
3514 if (!isUndefOrInRange(Idx, RngStart, RngStart+NumLaneElems))
3516 // For VSHUFPSY, the mask of the second half must be the same as the
3517 // first but with the appropriate offsets. This works in the same way as
3518 // VPERMILPS works with masks.
3519 if (NumElems != 8 || l == 0 || Mask[i] < 0)
3521 if (!isUndefOrEqual(Idx, Mask[i]+l))
3529 /// isMOVHLPSMask - Return true if the specified VECTOR_SHUFFLE operand
3530 /// specifies a shuffle of elements that is suitable for input to MOVHLPS.
3531 static bool isMOVHLPSMask(ArrayRef<int> Mask, EVT VT) {
3532 if (!VT.is128BitVector())
3535 unsigned NumElems = VT.getVectorNumElements();
3540 // Expect bit0 == 6, bit1 == 7, bit2 == 2, bit3 == 3
3541 return isUndefOrEqual(Mask[0], 6) &&
3542 isUndefOrEqual(Mask[1], 7) &&
3543 isUndefOrEqual(Mask[2], 2) &&
3544 isUndefOrEqual(Mask[3], 3);
3547 /// isMOVHLPS_v_undef_Mask - Special case of isMOVHLPSMask for canonical form
3548 /// of vector_shuffle v, v, <2, 3, 2, 3>, i.e. vector_shuffle v, undef,
3550 static bool isMOVHLPS_v_undef_Mask(ArrayRef<int> Mask, EVT VT) {
3551 if (!VT.is128BitVector())
3554 unsigned NumElems = VT.getVectorNumElements();
3559 return isUndefOrEqual(Mask[0], 2) &&
3560 isUndefOrEqual(Mask[1], 3) &&
3561 isUndefOrEqual(Mask[2], 2) &&
3562 isUndefOrEqual(Mask[3], 3);
3565 /// isMOVLPMask - Return true if the specified VECTOR_SHUFFLE operand
3566 /// specifies a shuffle of elements that is suitable for input to MOVLP{S|D}.
3567 static bool isMOVLPMask(ArrayRef<int> Mask, EVT VT) {
3568 if (!VT.is128BitVector())
3571 unsigned NumElems = VT.getVectorNumElements();
3573 if (NumElems != 2 && NumElems != 4)
3576 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
3577 if (!isUndefOrEqual(Mask[i], i + NumElems))
3580 for (unsigned i = NumElems/2, e = NumElems; i != e; ++i)
3581 if (!isUndefOrEqual(Mask[i], i))
3587 /// isMOVLHPSMask - Return true if the specified VECTOR_SHUFFLE operand
3588 /// specifies a shuffle of elements that is suitable for input to MOVLHPS.
3589 static bool isMOVLHPSMask(ArrayRef<int> Mask, EVT VT) {
3590 if (!VT.is128BitVector())
3593 unsigned NumElems = VT.getVectorNumElements();
3595 if (NumElems != 2 && NumElems != 4)
3598 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
3599 if (!isUndefOrEqual(Mask[i], i))
3602 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
3603 if (!isUndefOrEqual(Mask[i + e], i + NumElems))
3610 // Some special combinations that can be optimized.
3613 SDValue Compact8x32ShuffleNode(ShuffleVectorSDNode *SVOp,
3614 SelectionDAG &DAG) {
3615 MVT VT = SVOp->getValueType(0).getSimpleVT();
3616 DebugLoc dl = SVOp->getDebugLoc();
3618 if (VT != MVT::v8i32 && VT != MVT::v8f32)
3621 ArrayRef<int> Mask = SVOp->getMask();
3623 // These are the special masks that may be optimized.
3624 static const int MaskToOptimizeEven[] = {0, 8, 2, 10, 4, 12, 6, 14};
3625 static const int MaskToOptimizeOdd[] = {1, 9, 3, 11, 5, 13, 7, 15};
3626 bool MatchEvenMask = true;
3627 bool MatchOddMask = true;
3628 for (int i=0; i<8; ++i) {
3629 if (!isUndefOrEqual(Mask[i], MaskToOptimizeEven[i]))
3630 MatchEvenMask = false;
3631 if (!isUndefOrEqual(Mask[i], MaskToOptimizeOdd[i]))
3632 MatchOddMask = false;
3635 if (!MatchEvenMask && !MatchOddMask)
3638 SDValue UndefNode = DAG.getNode(ISD::UNDEF, dl, VT);
3640 SDValue Op0 = SVOp->getOperand(0);
3641 SDValue Op1 = SVOp->getOperand(1);
3643 if (MatchEvenMask) {
3644 // Shift the second operand right to 32 bits.
3645 static const int ShiftRightMask[] = {-1, 0, -1, 2, -1, 4, -1, 6 };
3646 Op1 = DAG.getVectorShuffle(VT, dl, Op1, UndefNode, ShiftRightMask);
3648 // Shift the first operand left to 32 bits.
3649 static const int ShiftLeftMask[] = {1, -1, 3, -1, 5, -1, 7, -1 };
3650 Op0 = DAG.getVectorShuffle(VT, dl, Op0, UndefNode, ShiftLeftMask);
3652 static const int BlendMask[] = {0, 9, 2, 11, 4, 13, 6, 15};
3653 return DAG.getVectorShuffle(VT, dl, Op0, Op1, BlendMask);
3656 /// isUNPCKLMask - Return true if the specified VECTOR_SHUFFLE operand
3657 /// specifies a shuffle of elements that is suitable for input to UNPCKL.
3658 static bool isUNPCKLMask(ArrayRef<int> Mask, EVT VT,
3659 bool HasInt256, bool V2IsSplat = false) {
3660 unsigned NumElts = VT.getVectorNumElements();
3662 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3663 "Unsupported vector type for unpckh");
3665 if (VT.is256BitVector() && NumElts != 4 && NumElts != 8 &&
3666 (!HasInt256 || (NumElts != 16 && NumElts != 32)))
3669 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3670 // independently on 128-bit lanes.
3671 unsigned NumLanes = VT.getSizeInBits()/128;
3672 unsigned NumLaneElts = NumElts/NumLanes;
3674 for (unsigned l = 0; l != NumLanes; ++l) {
3675 for (unsigned i = l*NumLaneElts, j = l*NumLaneElts;
3676 i != (l+1)*NumLaneElts;
3679 int BitI1 = Mask[i+1];
3680 if (!isUndefOrEqual(BitI, j))
3683 if (!isUndefOrEqual(BitI1, NumElts))
3686 if (!isUndefOrEqual(BitI1, j + NumElts))
3695 /// isUNPCKHMask - Return true if the specified VECTOR_SHUFFLE operand
3696 /// specifies a shuffle of elements that is suitable for input to UNPCKH.
3697 static bool isUNPCKHMask(ArrayRef<int> Mask, EVT VT,
3698 bool HasInt256, bool V2IsSplat = false) {
3699 unsigned NumElts = VT.getVectorNumElements();
3701 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3702 "Unsupported vector type for unpckh");
3704 if (VT.is256BitVector() && NumElts != 4 && NumElts != 8 &&
3705 (!HasInt256 || (NumElts != 16 && NumElts != 32)))
3708 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3709 // independently on 128-bit lanes.
3710 unsigned NumLanes = VT.getSizeInBits()/128;
3711 unsigned NumLaneElts = NumElts/NumLanes;
3713 for (unsigned l = 0; l != NumLanes; ++l) {
3714 for (unsigned i = l*NumLaneElts, j = (l*NumLaneElts)+NumLaneElts/2;
3715 i != (l+1)*NumLaneElts; i += 2, ++j) {
3717 int BitI1 = Mask[i+1];
3718 if (!isUndefOrEqual(BitI, j))
3721 if (isUndefOrEqual(BitI1, NumElts))
3724 if (!isUndefOrEqual(BitI1, j+NumElts))
3732 /// isUNPCKL_v_undef_Mask - Special case of isUNPCKLMask for canonical form
3733 /// of vector_shuffle v, v, <0, 4, 1, 5>, i.e. vector_shuffle v, undef,
3735 static bool isUNPCKL_v_undef_Mask(ArrayRef<int> Mask, EVT VT, bool HasInt256) {
3736 unsigned NumElts = VT.getVectorNumElements();
3737 bool Is256BitVec = VT.is256BitVector();
3739 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3740 "Unsupported vector type for unpckh");
3742 if (Is256BitVec && NumElts != 4 && NumElts != 8 &&
3743 (!HasInt256 || (NumElts != 16 && NumElts != 32)))
3746 // For 256-bit i64/f64, use MOVDDUPY instead, so reject the matching pattern
3747 // FIXME: Need a better way to get rid of this, there's no latency difference
3748 // between UNPCKLPD and MOVDDUP, the later should always be checked first and
3749 // the former later. We should also remove the "_undef" special mask.
3750 if (NumElts == 4 && Is256BitVec)
3753 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3754 // independently on 128-bit lanes.
3755 unsigned NumLanes = VT.getSizeInBits()/128;
3756 unsigned NumLaneElts = NumElts/NumLanes;
3758 for (unsigned l = 0; l != NumLanes; ++l) {
3759 for (unsigned i = l*NumLaneElts, j = l*NumLaneElts;
3760 i != (l+1)*NumLaneElts;
3763 int BitI1 = Mask[i+1];
3765 if (!isUndefOrEqual(BitI, j))
3767 if (!isUndefOrEqual(BitI1, j))
3775 /// isUNPCKH_v_undef_Mask - Special case of isUNPCKHMask for canonical form
3776 /// of vector_shuffle v, v, <2, 6, 3, 7>, i.e. vector_shuffle v, undef,
3778 static bool isUNPCKH_v_undef_Mask(ArrayRef<int> Mask, EVT VT, bool HasInt256) {
3779 unsigned NumElts = VT.getVectorNumElements();
3781 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3782 "Unsupported vector type for unpckh");
3784 if (VT.is256BitVector() && NumElts != 4 && NumElts != 8 &&
3785 (!HasInt256 || (NumElts != 16 && NumElts != 32)))
3788 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3789 // independently on 128-bit lanes.
3790 unsigned NumLanes = VT.getSizeInBits()/128;
3791 unsigned NumLaneElts = NumElts/NumLanes;
3793 for (unsigned l = 0; l != NumLanes; ++l) {
3794 for (unsigned i = l*NumLaneElts, j = (l*NumLaneElts)+NumLaneElts/2;
3795 i != (l+1)*NumLaneElts; i += 2, ++j) {
3797 int BitI1 = Mask[i+1];
3798 if (!isUndefOrEqual(BitI, j))
3800 if (!isUndefOrEqual(BitI1, j))
3807 /// isMOVLMask - Return true if the specified VECTOR_SHUFFLE operand
3808 /// specifies a shuffle of elements that is suitable for input to MOVSS,
3809 /// MOVSD, and MOVD, i.e. setting the lowest element.
3810 static bool isMOVLMask(ArrayRef<int> Mask, EVT VT) {
3811 if (VT.getVectorElementType().getSizeInBits() < 32)
3813 if (!VT.is128BitVector())
3816 unsigned NumElts = VT.getVectorNumElements();
3818 if (!isUndefOrEqual(Mask[0], NumElts))
3821 for (unsigned i = 1; i != NumElts; ++i)
3822 if (!isUndefOrEqual(Mask[i], i))
3828 /// isVPERM2X128Mask - Match 256-bit shuffles where the elements are considered
3829 /// as permutations between 128-bit chunks or halves. As an example: this
3831 /// vector_shuffle <4, 5, 6, 7, 12, 13, 14, 15>
3832 /// The first half comes from the second half of V1 and the second half from the
3833 /// the second half of V2.
3834 static bool isVPERM2X128Mask(ArrayRef<int> Mask, EVT VT, bool HasFp256) {
3835 if (!HasFp256 || !VT.is256BitVector())
3838 // The shuffle result is divided into half A and half B. In total the two
3839 // sources have 4 halves, namely: C, D, E, F. The final values of A and
3840 // B must come from C, D, E or F.
3841 unsigned HalfSize = VT.getVectorNumElements()/2;
3842 bool MatchA = false, MatchB = false;
3844 // Check if A comes from one of C, D, E, F.
3845 for (unsigned Half = 0; Half != 4; ++Half) {
3846 if (isSequentialOrUndefInRange(Mask, 0, HalfSize, Half*HalfSize)) {
3852 // Check if B comes from one of C, D, E, F.
3853 for (unsigned Half = 0; Half != 4; ++Half) {
3854 if (isSequentialOrUndefInRange(Mask, HalfSize, HalfSize, Half*HalfSize)) {
3860 return MatchA && MatchB;
3863 /// getShuffleVPERM2X128Immediate - Return the appropriate immediate to shuffle
3864 /// the specified VECTOR_MASK mask with VPERM2F128/VPERM2I128 instructions.
3865 static unsigned getShuffleVPERM2X128Immediate(ShuffleVectorSDNode *SVOp) {
3866 MVT VT = SVOp->getValueType(0).getSimpleVT();
3868 unsigned HalfSize = VT.getVectorNumElements()/2;
3870 unsigned FstHalf = 0, SndHalf = 0;
3871 for (unsigned i = 0; i < HalfSize; ++i) {
3872 if (SVOp->getMaskElt(i) > 0) {
3873 FstHalf = SVOp->getMaskElt(i)/HalfSize;
3877 for (unsigned i = HalfSize; i < HalfSize*2; ++i) {
3878 if (SVOp->getMaskElt(i) > 0) {
3879 SndHalf = SVOp->getMaskElt(i)/HalfSize;
3884 return (FstHalf | (SndHalf << 4));
3887 /// isVPERMILPMask - Return true if the specified VECTOR_SHUFFLE operand
3888 /// specifies a shuffle of elements that is suitable for input to VPERMILPD*.
3889 /// Note that VPERMIL mask matching is different depending whether theunderlying
3890 /// type is 32 or 64. In the VPERMILPS the high half of the mask should point
3891 /// to the same elements of the low, but to the higher half of the source.
3892 /// In VPERMILPD the two lanes could be shuffled independently of each other
3893 /// with the same restriction that lanes can't be crossed. Also handles PSHUFDY.
3894 static bool isVPERMILPMask(ArrayRef<int> Mask, EVT VT, bool HasFp256) {
3898 unsigned NumElts = VT.getVectorNumElements();
3899 // Only match 256-bit with 32/64-bit types
3900 if (!VT.is256BitVector() || (NumElts != 4 && NumElts != 8))
3903 unsigned NumLanes = VT.getSizeInBits()/128;
3904 unsigned LaneSize = NumElts/NumLanes;
3905 for (unsigned l = 0; l != NumElts; l += LaneSize) {
3906 for (unsigned i = 0; i != LaneSize; ++i) {
3907 if (!isUndefOrInRange(Mask[i+l], l, l+LaneSize))
3909 if (NumElts != 8 || l == 0)
3911 // VPERMILPS handling
3914 if (!isUndefOrEqual(Mask[i+l], Mask[i]+l))
3922 /// isCommutedMOVLMask - Returns true if the shuffle mask is except the reverse
3923 /// of what x86 movss want. X86 movs requires the lowest element to be lowest
3924 /// element of vector 2 and the other elements to come from vector 1 in order.
3925 static bool isCommutedMOVLMask(ArrayRef<int> Mask, EVT VT,
3926 bool V2IsSplat = false, bool V2IsUndef = false) {
3927 if (!VT.is128BitVector())
3930 unsigned NumOps = VT.getVectorNumElements();
3931 if (NumOps != 2 && NumOps != 4 && NumOps != 8 && NumOps != 16)
3934 if (!isUndefOrEqual(Mask[0], 0))
3937 for (unsigned i = 1; i != NumOps; ++i)
3938 if (!(isUndefOrEqual(Mask[i], i+NumOps) ||
3939 (V2IsUndef && isUndefOrInRange(Mask[i], NumOps, NumOps*2)) ||
3940 (V2IsSplat && isUndefOrEqual(Mask[i], NumOps))))
3946 /// isMOVSHDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3947 /// specifies a shuffle of elements that is suitable for input to MOVSHDUP.
3948 /// Masks to match: <1, 1, 3, 3> or <1, 1, 3, 3, 5, 5, 7, 7>
3949 static bool isMOVSHDUPMask(ArrayRef<int> Mask, EVT VT,
3950 const X86Subtarget *Subtarget) {
3951 if (!Subtarget->hasSSE3())
3954 unsigned NumElems = VT.getVectorNumElements();
3956 if ((VT.is128BitVector() && NumElems != 4) ||
3957 (VT.is256BitVector() && NumElems != 8))
3960 // "i+1" is the value the indexed mask element must have
3961 for (unsigned i = 0; i != NumElems; i += 2)
3962 if (!isUndefOrEqual(Mask[i], i+1) ||
3963 !isUndefOrEqual(Mask[i+1], i+1))
3969 /// isMOVSLDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3970 /// specifies a shuffle of elements that is suitable for input to MOVSLDUP.
3971 /// Masks to match: <0, 0, 2, 2> or <0, 0, 2, 2, 4, 4, 6, 6>
3972 static bool isMOVSLDUPMask(ArrayRef<int> Mask, EVT VT,
3973 const X86Subtarget *Subtarget) {
3974 if (!Subtarget->hasSSE3())
3977 unsigned NumElems = VT.getVectorNumElements();
3979 if ((VT.is128BitVector() && NumElems != 4) ||
3980 (VT.is256BitVector() && NumElems != 8))
3983 // "i" is the value the indexed mask element must have
3984 for (unsigned i = 0; i != NumElems; i += 2)
3985 if (!isUndefOrEqual(Mask[i], i) ||
3986 !isUndefOrEqual(Mask[i+1], i))
3992 /// isMOVDDUPYMask - Return true if the specified VECTOR_SHUFFLE operand
3993 /// specifies a shuffle of elements that is suitable for input to 256-bit
3994 /// version of MOVDDUP.
3995 static bool isMOVDDUPYMask(ArrayRef<int> Mask, EVT VT, bool HasFp256) {
3996 if (!HasFp256 || !VT.is256BitVector())
3999 unsigned NumElts = VT.getVectorNumElements();
4003 for (unsigned i = 0; i != NumElts/2; ++i)
4004 if (!isUndefOrEqual(Mask[i], 0))
4006 for (unsigned i = NumElts/2; i != NumElts; ++i)
4007 if (!isUndefOrEqual(Mask[i], NumElts/2))
4012 /// isMOVDDUPMask - Return true if the specified VECTOR_SHUFFLE operand
4013 /// specifies a shuffle of elements that is suitable for input to 128-bit
4014 /// version of MOVDDUP.
4015 static bool isMOVDDUPMask(ArrayRef<int> Mask, EVT VT) {
4016 if (!VT.is128BitVector())
4019 unsigned e = VT.getVectorNumElements() / 2;
4020 for (unsigned i = 0; i != e; ++i)
4021 if (!isUndefOrEqual(Mask[i], i))
4023 for (unsigned i = 0; i != e; ++i)
4024 if (!isUndefOrEqual(Mask[e+i], i))
4029 /// isVEXTRACTF128Index - Return true if the specified
4030 /// EXTRACT_SUBVECTOR operand specifies a vector extract that is
4031 /// suitable for input to VEXTRACTF128.
4032 bool X86::isVEXTRACTF128Index(SDNode *N) {
4033 if (!isa<ConstantSDNode>(N->getOperand(1).getNode()))
4036 // The index should be aligned on a 128-bit boundary.
4038 cast<ConstantSDNode>(N->getOperand(1).getNode())->getZExtValue();
4040 MVT VT = N->getValueType(0).getSimpleVT();
4041 unsigned ElSize = VT.getVectorElementType().getSizeInBits();
4042 bool Result = (Index * ElSize) % 128 == 0;
4047 /// isVINSERTF128Index - Return true if the specified INSERT_SUBVECTOR
4048 /// operand specifies a subvector insert that is suitable for input to
4050 bool X86::isVINSERTF128Index(SDNode *N) {
4051 if (!isa<ConstantSDNode>(N->getOperand(2).getNode()))
4054 // The index should be aligned on a 128-bit boundary.
4056 cast<ConstantSDNode>(N->getOperand(2).getNode())->getZExtValue();
4058 MVT VT = N->getValueType(0).getSimpleVT();
4059 unsigned ElSize = VT.getVectorElementType().getSizeInBits();
4060 bool Result = (Index * ElSize) % 128 == 0;
4065 /// getShuffleSHUFImmediate - Return the appropriate immediate to shuffle
4066 /// the specified VECTOR_SHUFFLE mask with PSHUF* and SHUFP* instructions.
4067 /// Handles 128-bit and 256-bit.
4068 static unsigned getShuffleSHUFImmediate(ShuffleVectorSDNode *N) {
4069 MVT VT = N->getValueType(0).getSimpleVT();
4071 assert((VT.is128BitVector() || VT.is256BitVector()) &&
4072 "Unsupported vector type for PSHUF/SHUFP");
4074 // Handle 128 and 256-bit vector lengths. AVX defines PSHUF/SHUFP to operate
4075 // independently on 128-bit lanes.
4076 unsigned NumElts = VT.getVectorNumElements();
4077 unsigned NumLanes = VT.getSizeInBits()/128;
4078 unsigned NumLaneElts = NumElts/NumLanes;
4080 assert((NumLaneElts == 2 || NumLaneElts == 4) &&
4081 "Only supports 2 or 4 elements per lane");
4083 unsigned Shift = (NumLaneElts == 4) ? 1 : 0;
4085 for (unsigned i = 0; i != NumElts; ++i) {
4086 int Elt = N->getMaskElt(i);
4087 if (Elt < 0) continue;
4088 Elt &= NumLaneElts - 1;
4089 unsigned ShAmt = (i << Shift) % 8;
4090 Mask |= Elt << ShAmt;
4096 /// getShufflePSHUFHWImmediate - Return the appropriate immediate to shuffle
4097 /// the specified VECTOR_SHUFFLE mask with the PSHUFHW instruction.
4098 static unsigned getShufflePSHUFHWImmediate(ShuffleVectorSDNode *N) {
4099 MVT VT = N->getValueType(0).getSimpleVT();
4101 assert((VT == MVT::v8i16 || VT == MVT::v16i16) &&
4102 "Unsupported vector type for PSHUFHW");
4104 unsigned NumElts = VT.getVectorNumElements();
4107 for (unsigned l = 0; l != NumElts; l += 8) {
4108 // 8 nodes per lane, but we only care about the last 4.
4109 for (unsigned i = 0; i < 4; ++i) {
4110 int Elt = N->getMaskElt(l+i+4);
4111 if (Elt < 0) continue;
4112 Elt &= 0x3; // only 2-bits.
4113 Mask |= Elt << (i * 2);
4120 /// getShufflePSHUFLWImmediate - Return the appropriate immediate to shuffle
4121 /// the specified VECTOR_SHUFFLE mask with the PSHUFLW instruction.
4122 static unsigned getShufflePSHUFLWImmediate(ShuffleVectorSDNode *N) {
4123 MVT VT = N->getValueType(0).getSimpleVT();
4125 assert((VT == MVT::v8i16 || VT == MVT::v16i16) &&
4126 "Unsupported vector type for PSHUFHW");
4128 unsigned NumElts = VT.getVectorNumElements();
4131 for (unsigned l = 0; l != NumElts; l += 8) {
4132 // 8 nodes per lane, but we only care about the first 4.
4133 for (unsigned i = 0; i < 4; ++i) {
4134 int Elt = N->getMaskElt(l+i);
4135 if (Elt < 0) continue;
4136 Elt &= 0x3; // only 2-bits
4137 Mask |= Elt << (i * 2);
4144 /// getShufflePALIGNRImmediate - Return the appropriate immediate to shuffle
4145 /// the specified VECTOR_SHUFFLE mask with the PALIGNR instruction.
4146 static unsigned getShufflePALIGNRImmediate(ShuffleVectorSDNode *SVOp) {
4147 MVT VT = SVOp->getValueType(0).getSimpleVT();
4148 unsigned EltSize = VT.getVectorElementType().getSizeInBits() >> 3;
4150 unsigned NumElts = VT.getVectorNumElements();
4151 unsigned NumLanes = VT.getSizeInBits()/128;
4152 unsigned NumLaneElts = NumElts/NumLanes;
4156 for (i = 0; i != NumElts; ++i) {
4157 Val = SVOp->getMaskElt(i);
4161 if (Val >= (int)NumElts)
4162 Val -= NumElts - NumLaneElts;
4164 assert(Val - i > 0 && "PALIGNR imm should be positive");
4165 return (Val - i) * EltSize;
4168 /// getExtractVEXTRACTF128Immediate - Return the appropriate immediate
4169 /// to extract the specified EXTRACT_SUBVECTOR index with VEXTRACTF128
4171 unsigned X86::getExtractVEXTRACTF128Immediate(SDNode *N) {
4172 if (!isa<ConstantSDNode>(N->getOperand(1).getNode()))
4173 llvm_unreachable("Illegal extract subvector for VEXTRACTF128");
4176 cast<ConstantSDNode>(N->getOperand(1).getNode())->getZExtValue();
4178 MVT VecVT = N->getOperand(0).getValueType().getSimpleVT();
4179 MVT ElVT = VecVT.getVectorElementType();
4181 unsigned NumElemsPerChunk = 128 / ElVT.getSizeInBits();
4182 return Index / NumElemsPerChunk;
4185 /// getInsertVINSERTF128Immediate - Return the appropriate immediate
4186 /// to insert at the specified INSERT_SUBVECTOR index with VINSERTF128
4188 unsigned X86::getInsertVINSERTF128Immediate(SDNode *N) {
4189 if (!isa<ConstantSDNode>(N->getOperand(2).getNode()))
4190 llvm_unreachable("Illegal insert subvector for VINSERTF128");
4193 cast<ConstantSDNode>(N->getOperand(2).getNode())->getZExtValue();
4195 MVT VecVT = N->getValueType(0).getSimpleVT();
4196 MVT ElVT = VecVT.getVectorElementType();
4198 unsigned NumElemsPerChunk = 128 / ElVT.getSizeInBits();
4199 return Index / NumElemsPerChunk;
4202 /// getShuffleCLImmediate - Return the appropriate immediate to shuffle
4203 /// the specified VECTOR_SHUFFLE mask with VPERMQ and VPERMPD instructions.
4204 /// Handles 256-bit.
4205 static unsigned getShuffleCLImmediate(ShuffleVectorSDNode *N) {
4206 MVT VT = N->getValueType(0).getSimpleVT();
4208 unsigned NumElts = VT.getVectorNumElements();
4210 assert((VT.is256BitVector() && NumElts == 4) &&
4211 "Unsupported vector type for VPERMQ/VPERMPD");
4214 for (unsigned i = 0; i != NumElts; ++i) {
4215 int Elt = N->getMaskElt(i);
4218 Mask |= Elt << (i*2);
4223 /// isZeroNode - Returns true if Elt is a constant zero or a floating point
4225 bool X86::isZeroNode(SDValue Elt) {
4226 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Elt))
4227 return CN->isNullValue();
4228 if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Elt))
4229 return CFP->getValueAPF().isPosZero();
4233 /// CommuteVectorShuffle - Swap vector_shuffle operands as well as values in
4234 /// their permute mask.
4235 static SDValue CommuteVectorShuffle(ShuffleVectorSDNode *SVOp,
4236 SelectionDAG &DAG) {
4237 MVT VT = SVOp->getValueType(0).getSimpleVT();
4238 unsigned NumElems = VT.getVectorNumElements();
4239 SmallVector<int, 8> MaskVec;
4241 for (unsigned i = 0; i != NumElems; ++i) {
4242 int Idx = SVOp->getMaskElt(i);
4244 if (Idx < (int)NumElems)
4249 MaskVec.push_back(Idx);
4251 return DAG.getVectorShuffle(VT, SVOp->getDebugLoc(), SVOp->getOperand(1),
4252 SVOp->getOperand(0), &MaskVec[0]);
4255 /// ShouldXformToMOVHLPS - Return true if the node should be transformed to
4256 /// match movhlps. The lower half elements should come from upper half of
4257 /// V1 (and in order), and the upper half elements should come from the upper
4258 /// half of V2 (and in order).
4259 static bool ShouldXformToMOVHLPS(ArrayRef<int> Mask, EVT VT) {
4260 if (!VT.is128BitVector())
4262 if (VT.getVectorNumElements() != 4)
4264 for (unsigned i = 0, e = 2; i != e; ++i)
4265 if (!isUndefOrEqual(Mask[i], i+2))
4267 for (unsigned i = 2; i != 4; ++i)
4268 if (!isUndefOrEqual(Mask[i], i+4))
4273 /// isScalarLoadToVector - Returns true if the node is a scalar load that
4274 /// is promoted to a vector. It also returns the LoadSDNode by reference if
4276 static bool isScalarLoadToVector(SDNode *N, LoadSDNode **LD = NULL) {
4277 if (N->getOpcode() != ISD::SCALAR_TO_VECTOR)
4279 N = N->getOperand(0).getNode();
4280 if (!ISD::isNON_EXTLoad(N))
4283 *LD = cast<LoadSDNode>(N);
4287 // Test whether the given value is a vector value which will be legalized
4289 static bool WillBeConstantPoolLoad(SDNode *N) {
4290 if (N->getOpcode() != ISD::BUILD_VECTOR)
4293 // Check for any non-constant elements.
4294 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
4295 switch (N->getOperand(i).getNode()->getOpcode()) {
4297 case ISD::ConstantFP:
4304 // Vectors of all-zeros and all-ones are materialized with special
4305 // instructions rather than being loaded.
4306 return !ISD::isBuildVectorAllZeros(N) &&
4307 !ISD::isBuildVectorAllOnes(N);
4310 /// ShouldXformToMOVLP{S|D} - Return true if the node should be transformed to
4311 /// match movlp{s|d}. The lower half elements should come from lower half of
4312 /// V1 (and in order), and the upper half elements should come from the upper
4313 /// half of V2 (and in order). And since V1 will become the source of the
4314 /// MOVLP, it must be either a vector load or a scalar load to vector.
4315 static bool ShouldXformToMOVLP(SDNode *V1, SDNode *V2,
4316 ArrayRef<int> Mask, EVT VT) {
4317 if (!VT.is128BitVector())
4320 if (!ISD::isNON_EXTLoad(V1) && !isScalarLoadToVector(V1))
4322 // Is V2 is a vector load, don't do this transformation. We will try to use
4323 // load folding shufps op.
4324 if (ISD::isNON_EXTLoad(V2) || WillBeConstantPoolLoad(V2))
4327 unsigned NumElems = VT.getVectorNumElements();
4329 if (NumElems != 2 && NumElems != 4)
4331 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
4332 if (!isUndefOrEqual(Mask[i], i))
4334 for (unsigned i = NumElems/2, e = NumElems; i != e; ++i)
4335 if (!isUndefOrEqual(Mask[i], i+NumElems))
4340 /// isSplatVector - Returns true if N is a BUILD_VECTOR node whose elements are
4342 static bool isSplatVector(SDNode *N) {
4343 if (N->getOpcode() != ISD::BUILD_VECTOR)
4346 SDValue SplatValue = N->getOperand(0);
4347 for (unsigned i = 1, e = N->getNumOperands(); i != e; ++i)
4348 if (N->getOperand(i) != SplatValue)
4353 /// isZeroShuffle - Returns true if N is a VECTOR_SHUFFLE that can be resolved
4354 /// to an zero vector.
4355 /// FIXME: move to dag combiner / method on ShuffleVectorSDNode
4356 static bool isZeroShuffle(ShuffleVectorSDNode *N) {
4357 SDValue V1 = N->getOperand(0);
4358 SDValue V2 = N->getOperand(1);
4359 unsigned NumElems = N->getValueType(0).getVectorNumElements();
4360 for (unsigned i = 0; i != NumElems; ++i) {
4361 int Idx = N->getMaskElt(i);
4362 if (Idx >= (int)NumElems) {
4363 unsigned Opc = V2.getOpcode();
4364 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V2.getNode()))
4366 if (Opc != ISD::BUILD_VECTOR ||
4367 !X86::isZeroNode(V2.getOperand(Idx-NumElems)))
4369 } else if (Idx >= 0) {
4370 unsigned Opc = V1.getOpcode();
4371 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V1.getNode()))
4373 if (Opc != ISD::BUILD_VECTOR ||
4374 !X86::isZeroNode(V1.getOperand(Idx)))
4381 /// getZeroVector - Returns a vector of specified type with all zero elements.
4383 static SDValue getZeroVector(EVT VT, const X86Subtarget *Subtarget,
4384 SelectionDAG &DAG, DebugLoc dl) {
4385 assert(VT.isVector() && "Expected a vector type");
4387 // Always build SSE zero vectors as <4 x i32> bitcasted
4388 // to their dest type. This ensures they get CSE'd.
4390 if (VT.is128BitVector()) { // SSE
4391 if (Subtarget->hasSSE2()) { // SSE2
4392 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
4393 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
4395 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
4396 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4f32, Cst, Cst, Cst, Cst);
4398 } else if (VT.is256BitVector()) { // AVX
4399 if (Subtarget->hasInt256()) { // AVX2
4400 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
4401 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
4402 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8i32, Ops, 8);
4404 // 256-bit logic and arithmetic instructions in AVX are all
4405 // floating-point, no support for integer ops. Emit fp zeroed vectors.
4406 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
4407 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
4408 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8f32, Ops, 8);
4411 llvm_unreachable("Unexpected vector type");
4413 return DAG.getNode(ISD::BITCAST, dl, VT, Vec);
4416 /// getOnesVector - Returns a vector of specified type with all bits set.
4417 /// Always build ones vectors as <4 x i32> or <8 x i32>. For 256-bit types with
4418 /// no AVX2 supprt, use two <4 x i32> inserted in a <8 x i32> appropriately.
4419 /// Then bitcast to their original type, ensuring they get CSE'd.
4420 static SDValue getOnesVector(MVT VT, bool HasInt256, SelectionDAG &DAG,
4422 assert(VT.isVector() && "Expected a vector type");
4424 SDValue Cst = DAG.getTargetConstant(~0U, MVT::i32);
4426 if (VT.is256BitVector()) {
4427 if (HasInt256) { // AVX2
4428 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
4429 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8i32, Ops, 8);
4431 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
4432 Vec = Concat128BitVectors(Vec, Vec, MVT::v8i32, 8, DAG, dl);
4434 } else if (VT.is128BitVector()) {
4435 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
4437 llvm_unreachable("Unexpected vector type");
4439 return DAG.getNode(ISD::BITCAST, dl, VT, Vec);
4442 /// NormalizeMask - V2 is a splat, modify the mask (if needed) so all elements
4443 /// that point to V2 points to its first element.
4444 static void NormalizeMask(SmallVectorImpl<int> &Mask, unsigned NumElems) {
4445 for (unsigned i = 0; i != NumElems; ++i) {
4446 if (Mask[i] > (int)NumElems) {
4452 /// getMOVLMask - Returns a vector_shuffle mask for an movs{s|d}, movd
4453 /// operation of specified width.
4454 static SDValue getMOVL(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
4456 unsigned NumElems = VT.getVectorNumElements();
4457 SmallVector<int, 8> Mask;
4458 Mask.push_back(NumElems);
4459 for (unsigned i = 1; i != NumElems; ++i)
4461 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
4464 /// getUnpackl - Returns a vector_shuffle node for an unpackl operation.
4465 static SDValue getUnpackl(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
4467 unsigned NumElems = VT.getVectorNumElements();
4468 SmallVector<int, 8> Mask;
4469 for (unsigned i = 0, e = NumElems/2; i != e; ++i) {
4471 Mask.push_back(i + NumElems);
4473 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
4476 /// getUnpackh - Returns a vector_shuffle node for an unpackh operation.
4477 static SDValue getUnpackh(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
4479 unsigned NumElems = VT.getVectorNumElements();
4480 SmallVector<int, 8> Mask;
4481 for (unsigned i = 0, Half = NumElems/2; i != Half; ++i) {
4482 Mask.push_back(i + Half);
4483 Mask.push_back(i + NumElems + Half);
4485 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
4488 // PromoteSplati8i16 - All i16 and i8 vector types can't be used directly by
4489 // a generic shuffle instruction because the target has no such instructions.
4490 // Generate shuffles which repeat i16 and i8 several times until they can be
4491 // represented by v4f32 and then be manipulated by target suported shuffles.
4492 static SDValue PromoteSplati8i16(SDValue V, SelectionDAG &DAG, int &EltNo) {
4493 EVT VT = V.getValueType();
4494 int NumElems = VT.getVectorNumElements();
4495 DebugLoc dl = V.getDebugLoc();
4497 while (NumElems > 4) {
4498 if (EltNo < NumElems/2) {
4499 V = getUnpackl(DAG, dl, VT, V, V);
4501 V = getUnpackh(DAG, dl, VT, V, V);
4502 EltNo -= NumElems/2;
4509 /// getLegalSplat - Generate a legal splat with supported x86 shuffles
4510 static SDValue getLegalSplat(SelectionDAG &DAG, SDValue V, int EltNo) {
4511 EVT VT = V.getValueType();
4512 DebugLoc dl = V.getDebugLoc();
4514 if (VT.is128BitVector()) {
4515 V = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, V);
4516 int SplatMask[4] = { EltNo, EltNo, EltNo, EltNo };
4517 V = DAG.getVectorShuffle(MVT::v4f32, dl, V, DAG.getUNDEF(MVT::v4f32),
4519 } else if (VT.is256BitVector()) {
4520 // To use VPERMILPS to splat scalars, the second half of indicies must
4521 // refer to the higher part, which is a duplication of the lower one,
4522 // because VPERMILPS can only handle in-lane permutations.
4523 int SplatMask[8] = { EltNo, EltNo, EltNo, EltNo,
4524 EltNo+4, EltNo+4, EltNo+4, EltNo+4 };
4526 V = DAG.getNode(ISD::BITCAST, dl, MVT::v8f32, V);
4527 V = DAG.getVectorShuffle(MVT::v8f32, dl, V, DAG.getUNDEF(MVT::v8f32),
4530 llvm_unreachable("Vector size not supported");
4532 return DAG.getNode(ISD::BITCAST, dl, VT, V);
4535 /// PromoteSplat - Splat is promoted to target supported vector shuffles.
4536 static SDValue PromoteSplat(ShuffleVectorSDNode *SV, SelectionDAG &DAG) {
4537 EVT SrcVT = SV->getValueType(0);
4538 SDValue V1 = SV->getOperand(0);
4539 DebugLoc dl = SV->getDebugLoc();
4541 int EltNo = SV->getSplatIndex();
4542 int NumElems = SrcVT.getVectorNumElements();
4543 bool Is256BitVec = SrcVT.is256BitVector();
4545 assert(((SrcVT.is128BitVector() && NumElems > 4) || Is256BitVec) &&
4546 "Unknown how to promote splat for type");
4548 // Extract the 128-bit part containing the splat element and update
4549 // the splat element index when it refers to the higher register.
4551 V1 = Extract128BitVector(V1, EltNo, DAG, dl);
4552 if (EltNo >= NumElems/2)
4553 EltNo -= NumElems/2;
4556 // All i16 and i8 vector types can't be used directly by a generic shuffle
4557 // instruction because the target has no such instruction. Generate shuffles
4558 // which repeat i16 and i8 several times until they fit in i32, and then can
4559 // be manipulated by target suported shuffles.
4560 EVT EltVT = SrcVT.getVectorElementType();
4561 if (EltVT == MVT::i8 || EltVT == MVT::i16)
4562 V1 = PromoteSplati8i16(V1, DAG, EltNo);
4564 // Recreate the 256-bit vector and place the same 128-bit vector
4565 // into the low and high part. This is necessary because we want
4566 // to use VPERM* to shuffle the vectors
4568 V1 = DAG.getNode(ISD::CONCAT_VECTORS, dl, SrcVT, V1, V1);
4571 return getLegalSplat(DAG, V1, EltNo);
4574 /// getShuffleVectorZeroOrUndef - Return a vector_shuffle of the specified
4575 /// vector of zero or undef vector. This produces a shuffle where the low
4576 /// element of V2 is swizzled into the zero/undef vector, landing at element
4577 /// Idx. This produces a shuffle mask like 4,1,2,3 (idx=0) or 0,1,2,4 (idx=3).
4578 static SDValue getShuffleVectorZeroOrUndef(SDValue V2, unsigned Idx,
4580 const X86Subtarget *Subtarget,
4581 SelectionDAG &DAG) {
4582 EVT VT = V2.getValueType();
4584 ? getZeroVector(VT, Subtarget, DAG, V2.getDebugLoc()) : DAG.getUNDEF(VT);
4585 unsigned NumElems = VT.getVectorNumElements();
4586 SmallVector<int, 16> MaskVec;
4587 for (unsigned i = 0; i != NumElems; ++i)
4588 // If this is the insertion idx, put the low elt of V2 here.
4589 MaskVec.push_back(i == Idx ? NumElems : i);
4590 return DAG.getVectorShuffle(VT, V2.getDebugLoc(), V1, V2, &MaskVec[0]);
4593 /// getTargetShuffleMask - Calculates the shuffle mask corresponding to the
4594 /// target specific opcode. Returns true if the Mask could be calculated.
4595 /// Sets IsUnary to true if only uses one source.
4596 static bool getTargetShuffleMask(SDNode *N, MVT VT,
4597 SmallVectorImpl<int> &Mask, bool &IsUnary) {
4598 unsigned NumElems = VT.getVectorNumElements();
4602 switch(N->getOpcode()) {
4604 ImmN = N->getOperand(N->getNumOperands()-1);
4605 DecodeSHUFPMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4607 case X86ISD::UNPCKH:
4608 DecodeUNPCKHMask(VT, Mask);
4610 case X86ISD::UNPCKL:
4611 DecodeUNPCKLMask(VT, Mask);
4613 case X86ISD::MOVHLPS:
4614 DecodeMOVHLPSMask(NumElems, Mask);
4616 case X86ISD::MOVLHPS:
4617 DecodeMOVLHPSMask(NumElems, Mask);
4619 case X86ISD::PALIGNR:
4620 ImmN = N->getOperand(N->getNumOperands()-1);
4621 DecodePALIGNRMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4623 case X86ISD::PSHUFD:
4624 case X86ISD::VPERMILP:
4625 ImmN = N->getOperand(N->getNumOperands()-1);
4626 DecodePSHUFMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4629 case X86ISD::PSHUFHW:
4630 ImmN = N->getOperand(N->getNumOperands()-1);
4631 DecodePSHUFHWMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4634 case X86ISD::PSHUFLW:
4635 ImmN = N->getOperand(N->getNumOperands()-1);
4636 DecodePSHUFLWMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4639 case X86ISD::VPERMI:
4640 ImmN = N->getOperand(N->getNumOperands()-1);
4641 DecodeVPERMMask(cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4645 case X86ISD::MOVSD: {
4646 // The index 0 always comes from the first element of the second source,
4647 // this is why MOVSS and MOVSD are used in the first place. The other
4648 // elements come from the other positions of the first source vector
4649 Mask.push_back(NumElems);
4650 for (unsigned i = 1; i != NumElems; ++i) {
4655 case X86ISD::VPERM2X128:
4656 ImmN = N->getOperand(N->getNumOperands()-1);
4657 DecodeVPERM2X128Mask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4658 if (Mask.empty()) return false;
4660 case X86ISD::MOVDDUP:
4661 case X86ISD::MOVLHPD:
4662 case X86ISD::MOVLPD:
4663 case X86ISD::MOVLPS:
4664 case X86ISD::MOVSHDUP:
4665 case X86ISD::MOVSLDUP:
4666 // Not yet implemented
4668 default: llvm_unreachable("unknown target shuffle node");
4674 /// getShuffleScalarElt - Returns the scalar element that will make up the ith
4675 /// element of the result of the vector shuffle.
4676 static SDValue getShuffleScalarElt(SDNode *N, unsigned Index, SelectionDAG &DAG,
4679 return SDValue(); // Limit search depth.
4681 SDValue V = SDValue(N, 0);
4682 EVT VT = V.getValueType();
4683 unsigned Opcode = V.getOpcode();
4685 // Recurse into ISD::VECTOR_SHUFFLE node to find scalars.
4686 if (const ShuffleVectorSDNode *SV = dyn_cast<ShuffleVectorSDNode>(N)) {
4687 int Elt = SV->getMaskElt(Index);
4690 return DAG.getUNDEF(VT.getVectorElementType());
4692 unsigned NumElems = VT.getVectorNumElements();
4693 SDValue NewV = (Elt < (int)NumElems) ? SV->getOperand(0)
4694 : SV->getOperand(1);
4695 return getShuffleScalarElt(NewV.getNode(), Elt % NumElems, DAG, Depth+1);
4698 // Recurse into target specific vector shuffles to find scalars.
4699 if (isTargetShuffle(Opcode)) {
4700 MVT ShufVT = V.getValueType().getSimpleVT();
4701 unsigned NumElems = ShufVT.getVectorNumElements();
4702 SmallVector<int, 16> ShuffleMask;
4705 if (!getTargetShuffleMask(N, ShufVT, ShuffleMask, IsUnary))
4708 int Elt = ShuffleMask[Index];
4710 return DAG.getUNDEF(ShufVT.getVectorElementType());
4712 SDValue NewV = (Elt < (int)NumElems) ? N->getOperand(0)
4714 return getShuffleScalarElt(NewV.getNode(), Elt % NumElems, DAG,
4718 // Actual nodes that may contain scalar elements
4719 if (Opcode == ISD::BITCAST) {
4720 V = V.getOperand(0);
4721 EVT SrcVT = V.getValueType();
4722 unsigned NumElems = VT.getVectorNumElements();
4724 if (!SrcVT.isVector() || SrcVT.getVectorNumElements() != NumElems)
4728 if (V.getOpcode() == ISD::SCALAR_TO_VECTOR)
4729 return (Index == 0) ? V.getOperand(0)
4730 : DAG.getUNDEF(VT.getVectorElementType());
4732 if (V.getOpcode() == ISD::BUILD_VECTOR)
4733 return V.getOperand(Index);
4738 /// getNumOfConsecutiveZeros - Return the number of elements of a vector
4739 /// shuffle operation which come from a consecutively from a zero. The
4740 /// search can start in two different directions, from left or right.
4742 unsigned getNumOfConsecutiveZeros(ShuffleVectorSDNode *SVOp, unsigned NumElems,
4743 bool ZerosFromLeft, SelectionDAG &DAG) {
4745 for (i = 0; i != NumElems; ++i) {
4746 unsigned Index = ZerosFromLeft ? i : NumElems-i-1;
4747 SDValue Elt = getShuffleScalarElt(SVOp, Index, DAG, 0);
4748 if (!(Elt.getNode() &&
4749 (Elt.getOpcode() == ISD::UNDEF || X86::isZeroNode(Elt))))
4756 /// isShuffleMaskConsecutive - Check if the shuffle mask indicies [MaskI, MaskE)
4757 /// correspond consecutively to elements from one of the vector operands,
4758 /// starting from its index OpIdx. Also tell OpNum which source vector operand.
4760 bool isShuffleMaskConsecutive(ShuffleVectorSDNode *SVOp,
4761 unsigned MaskI, unsigned MaskE, unsigned OpIdx,
4762 unsigned NumElems, unsigned &OpNum) {
4763 bool SeenV1 = false;
4764 bool SeenV2 = false;
4766 for (unsigned i = MaskI; i != MaskE; ++i, ++OpIdx) {
4767 int Idx = SVOp->getMaskElt(i);
4768 // Ignore undef indicies
4772 if (Idx < (int)NumElems)
4777 // Only accept consecutive elements from the same vector
4778 if ((Idx % NumElems != OpIdx) || (SeenV1 && SeenV2))
4782 OpNum = SeenV1 ? 0 : 1;
4786 /// isVectorShiftRight - Returns true if the shuffle can be implemented as a
4787 /// logical left shift of a vector.
4788 static bool isVectorShiftRight(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4789 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4790 unsigned NumElems = SVOp->getValueType(0).getVectorNumElements();
4791 unsigned NumZeros = getNumOfConsecutiveZeros(SVOp, NumElems,
4792 false /* check zeros from right */, DAG);
4798 // Considering the elements in the mask that are not consecutive zeros,
4799 // check if they consecutively come from only one of the source vectors.
4801 // V1 = {X, A, B, C} 0
4803 // vector_shuffle V1, V2 <1, 2, 3, X>
4805 if (!isShuffleMaskConsecutive(SVOp,
4806 0, // Mask Start Index
4807 NumElems-NumZeros, // Mask End Index(exclusive)
4808 NumZeros, // Where to start looking in the src vector
4809 NumElems, // Number of elements in vector
4810 OpSrc)) // Which source operand ?
4815 ShVal = SVOp->getOperand(OpSrc);
4819 /// isVectorShiftLeft - Returns true if the shuffle can be implemented as a
4820 /// logical left shift of a vector.
4821 static bool isVectorShiftLeft(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4822 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4823 unsigned NumElems = SVOp->getValueType(0).getVectorNumElements();
4824 unsigned NumZeros = getNumOfConsecutiveZeros(SVOp, NumElems,
4825 true /* check zeros from left */, DAG);
4831 // Considering the elements in the mask that are not consecutive zeros,
4832 // check if they consecutively come from only one of the source vectors.
4834 // 0 { A, B, X, X } = V2
4836 // vector_shuffle V1, V2 <X, X, 4, 5>
4838 if (!isShuffleMaskConsecutive(SVOp,
4839 NumZeros, // Mask Start Index
4840 NumElems, // Mask End Index(exclusive)
4841 0, // Where to start looking in the src vector
4842 NumElems, // Number of elements in vector
4843 OpSrc)) // Which source operand ?
4848 ShVal = SVOp->getOperand(OpSrc);
4852 /// isVectorShift - Returns true if the shuffle can be implemented as a
4853 /// logical left or right shift of a vector.
4854 static bool isVectorShift(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4855 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4856 // Although the logic below support any bitwidth size, there are no
4857 // shift instructions which handle more than 128-bit vectors.
4858 if (!SVOp->getValueType(0).is128BitVector())
4861 if (isVectorShiftLeft(SVOp, DAG, isLeft, ShVal, ShAmt) ||
4862 isVectorShiftRight(SVOp, DAG, isLeft, ShVal, ShAmt))
4868 /// LowerBuildVectorv16i8 - Custom lower build_vector of v16i8.
4870 static SDValue LowerBuildVectorv16i8(SDValue Op, unsigned NonZeros,
4871 unsigned NumNonZero, unsigned NumZero,
4873 const X86Subtarget* Subtarget,
4874 const TargetLowering &TLI) {
4878 DebugLoc dl = Op.getDebugLoc();
4881 for (unsigned i = 0; i < 16; ++i) {
4882 bool ThisIsNonZero = (NonZeros & (1 << i)) != 0;
4883 if (ThisIsNonZero && First) {
4885 V = getZeroVector(MVT::v8i16, Subtarget, DAG, dl);
4887 V = DAG.getUNDEF(MVT::v8i16);
4892 SDValue ThisElt(0, 0), LastElt(0, 0);
4893 bool LastIsNonZero = (NonZeros & (1 << (i-1))) != 0;
4894 if (LastIsNonZero) {
4895 LastElt = DAG.getNode(ISD::ZERO_EXTEND, dl,
4896 MVT::i16, Op.getOperand(i-1));
4898 if (ThisIsNonZero) {
4899 ThisElt = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i16, Op.getOperand(i));
4900 ThisElt = DAG.getNode(ISD::SHL, dl, MVT::i16,
4901 ThisElt, DAG.getConstant(8, MVT::i8));
4903 ThisElt = DAG.getNode(ISD::OR, dl, MVT::i16, ThisElt, LastElt);
4907 if (ThisElt.getNode())
4908 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, V, ThisElt,
4909 DAG.getIntPtrConstant(i/2));
4913 return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V);
4916 /// LowerBuildVectorv8i16 - Custom lower build_vector of v8i16.
4918 static SDValue LowerBuildVectorv8i16(SDValue Op, unsigned NonZeros,
4919 unsigned NumNonZero, unsigned NumZero,
4921 const X86Subtarget* Subtarget,
4922 const TargetLowering &TLI) {
4926 DebugLoc dl = Op.getDebugLoc();
4929 for (unsigned i = 0; i < 8; ++i) {
4930 bool isNonZero = (NonZeros & (1 << i)) != 0;
4934 V = getZeroVector(MVT::v8i16, Subtarget, DAG, dl);
4936 V = DAG.getUNDEF(MVT::v8i16);
4939 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl,
4940 MVT::v8i16, V, Op.getOperand(i),
4941 DAG.getIntPtrConstant(i));
4948 /// getVShift - Return a vector logical shift node.
4950 static SDValue getVShift(bool isLeft, EVT VT, SDValue SrcOp,
4951 unsigned NumBits, SelectionDAG &DAG,
4952 const TargetLowering &TLI, DebugLoc dl) {
4953 assert(VT.is128BitVector() && "Unknown type for VShift");
4954 EVT ShVT = MVT::v2i64;
4955 unsigned Opc = isLeft ? X86ISD::VSHLDQ : X86ISD::VSRLDQ;
4956 SrcOp = DAG.getNode(ISD::BITCAST, dl, ShVT, SrcOp);
4957 return DAG.getNode(ISD::BITCAST, dl, VT,
4958 DAG.getNode(Opc, dl, ShVT, SrcOp,
4959 DAG.getConstant(NumBits,
4960 TLI.getScalarShiftAmountTy(SrcOp.getValueType()))));
4964 X86TargetLowering::LowerAsSplatVectorLoad(SDValue SrcOp, EVT VT, DebugLoc dl,
4965 SelectionDAG &DAG) const {
4967 // Check if the scalar load can be widened into a vector load. And if
4968 // the address is "base + cst" see if the cst can be "absorbed" into
4969 // the shuffle mask.
4970 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(SrcOp)) {
4971 SDValue Ptr = LD->getBasePtr();
4972 if (!ISD::isNormalLoad(LD) || LD->isVolatile())
4974 EVT PVT = LD->getValueType(0);
4975 if (PVT != MVT::i32 && PVT != MVT::f32)
4980 if (FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr)) {
4981 FI = FINode->getIndex();
4983 } else if (DAG.isBaseWithConstantOffset(Ptr) &&
4984 isa<FrameIndexSDNode>(Ptr.getOperand(0))) {
4985 FI = cast<FrameIndexSDNode>(Ptr.getOperand(0))->getIndex();
4986 Offset = Ptr.getConstantOperandVal(1);
4987 Ptr = Ptr.getOperand(0);
4992 // FIXME: 256-bit vector instructions don't require a strict alignment,
4993 // improve this code to support it better.
4994 unsigned RequiredAlign = VT.getSizeInBits()/8;
4995 SDValue Chain = LD->getChain();
4996 // Make sure the stack object alignment is at least 16 or 32.
4997 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
4998 if (DAG.InferPtrAlignment(Ptr) < RequiredAlign) {
4999 if (MFI->isFixedObjectIndex(FI)) {
5000 // Can't change the alignment. FIXME: It's possible to compute
5001 // the exact stack offset and reference FI + adjust offset instead.
5002 // If someone *really* cares about this. That's the way to implement it.
5005 MFI->setObjectAlignment(FI, RequiredAlign);
5009 // (Offset % 16 or 32) must be multiple of 4. Then address is then
5010 // Ptr + (Offset & ~15).
5013 if ((Offset % RequiredAlign) & 3)
5015 int64_t StartOffset = Offset & ~(RequiredAlign-1);
5017 Ptr = DAG.getNode(ISD::ADD, Ptr.getDebugLoc(), Ptr.getValueType(),
5018 Ptr,DAG.getConstant(StartOffset, Ptr.getValueType()));
5020 int EltNo = (Offset - StartOffset) >> 2;
5021 unsigned NumElems = VT.getVectorNumElements();
5023 EVT NVT = EVT::getVectorVT(*DAG.getContext(), PVT, NumElems);
5024 SDValue V1 = DAG.getLoad(NVT, dl, Chain, Ptr,
5025 LD->getPointerInfo().getWithOffset(StartOffset),
5026 false, false, false, 0);
5028 SmallVector<int, 8> Mask;
5029 for (unsigned i = 0; i != NumElems; ++i)
5030 Mask.push_back(EltNo);
5032 return DAG.getVectorShuffle(NVT, dl, V1, DAG.getUNDEF(NVT), &Mask[0]);
5038 /// EltsFromConsecutiveLoads - Given the initializing elements 'Elts' of a
5039 /// vector of type 'VT', see if the elements can be replaced by a single large
5040 /// load which has the same value as a build_vector whose operands are 'elts'.
5042 /// Example: <load i32 *a, load i32 *a+4, undef, undef> -> zextload a
5044 /// FIXME: we'd also like to handle the case where the last elements are zero
5045 /// rather than undef via VZEXT_LOAD, but we do not detect that case today.
5046 /// There's even a handy isZeroNode for that purpose.
5047 static SDValue EltsFromConsecutiveLoads(EVT VT, SmallVectorImpl<SDValue> &Elts,
5048 DebugLoc &DL, SelectionDAG &DAG) {
5049 EVT EltVT = VT.getVectorElementType();
5050 unsigned NumElems = Elts.size();
5052 LoadSDNode *LDBase = NULL;
5053 unsigned LastLoadedElt = -1U;
5055 // For each element in the initializer, see if we've found a load or an undef.
5056 // If we don't find an initial load element, or later load elements are
5057 // non-consecutive, bail out.
5058 for (unsigned i = 0; i < NumElems; ++i) {
5059 SDValue Elt = Elts[i];
5061 if (!Elt.getNode() ||
5062 (Elt.getOpcode() != ISD::UNDEF && !ISD::isNON_EXTLoad(Elt.getNode())))
5065 if (Elt.getNode()->getOpcode() == ISD::UNDEF)
5067 LDBase = cast<LoadSDNode>(Elt.getNode());
5071 if (Elt.getOpcode() == ISD::UNDEF)
5074 LoadSDNode *LD = cast<LoadSDNode>(Elt);
5075 if (!DAG.isConsecutiveLoad(LD, LDBase, EltVT.getSizeInBits()/8, i))
5080 // If we have found an entire vector of loads and undefs, then return a large
5081 // load of the entire vector width starting at the base pointer. If we found
5082 // consecutive loads for the low half, generate a vzext_load node.
5083 if (LastLoadedElt == NumElems - 1) {
5084 if (DAG.InferPtrAlignment(LDBase->getBasePtr()) >= 16)
5085 return DAG.getLoad(VT, DL, LDBase->getChain(), LDBase->getBasePtr(),
5086 LDBase->getPointerInfo(),
5087 LDBase->isVolatile(), LDBase->isNonTemporal(),
5088 LDBase->isInvariant(), 0);
5089 return DAG.getLoad(VT, DL, LDBase->getChain(), LDBase->getBasePtr(),
5090 LDBase->getPointerInfo(),
5091 LDBase->isVolatile(), LDBase->isNonTemporal(),
5092 LDBase->isInvariant(), LDBase->getAlignment());
5094 if (NumElems == 4 && LastLoadedElt == 1 &&
5095 DAG.getTargetLoweringInfo().isTypeLegal(MVT::v2i64)) {
5096 SDVTList Tys = DAG.getVTList(MVT::v2i64, MVT::Other);
5097 SDValue Ops[] = { LDBase->getChain(), LDBase->getBasePtr() };
5099 DAG.getMemIntrinsicNode(X86ISD::VZEXT_LOAD, DL, Tys, Ops, 2, MVT::i64,
5100 LDBase->getPointerInfo(),
5101 LDBase->getAlignment(),
5102 false/*isVolatile*/, true/*ReadMem*/,
5105 // Make sure the newly-created LOAD is in the same position as LDBase in
5106 // terms of dependency. We create a TokenFactor for LDBase and ResNode, and
5107 // update uses of LDBase's output chain to use the TokenFactor.
5108 if (LDBase->hasAnyUseOfValue(1)) {
5109 SDValue NewChain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
5110 SDValue(LDBase, 1), SDValue(ResNode.getNode(), 1));
5111 DAG.ReplaceAllUsesOfValueWith(SDValue(LDBase, 1), NewChain);
5112 DAG.UpdateNodeOperands(NewChain.getNode(), SDValue(LDBase, 1),
5113 SDValue(ResNode.getNode(), 1));
5116 return DAG.getNode(ISD::BITCAST, DL, VT, ResNode);
5121 /// LowerVectorBroadcast - Attempt to use the vbroadcast instruction
5122 /// to generate a splat value for the following cases:
5123 /// 1. A splat BUILD_VECTOR which uses a single scalar load, or a constant.
5124 /// 2. A splat shuffle which uses a scalar_to_vector node which comes from
5125 /// a scalar load, or a constant.
5126 /// The VBROADCAST node is returned when a pattern is found,
5127 /// or SDValue() otherwise.
5129 X86TargetLowering::LowerVectorBroadcast(SDValue Op, SelectionDAG &DAG) const {
5130 if (!Subtarget->hasFp256())
5133 MVT VT = Op.getValueType().getSimpleVT();
5134 DebugLoc dl = Op.getDebugLoc();
5136 assert((VT.is128BitVector() || VT.is256BitVector()) &&
5137 "Unsupported vector type for broadcast.");
5142 switch (Op.getOpcode()) {
5144 // Unknown pattern found.
5147 case ISD::BUILD_VECTOR: {
5148 // The BUILD_VECTOR node must be a splat.
5149 if (!isSplatVector(Op.getNode()))
5152 Ld = Op.getOperand(0);
5153 ConstSplatVal = (Ld.getOpcode() == ISD::Constant ||
5154 Ld.getOpcode() == ISD::ConstantFP);
5156 // The suspected load node has several users. Make sure that all
5157 // of its users are from the BUILD_VECTOR node.
5158 // Constants may have multiple users.
5159 if (!ConstSplatVal && !Ld->hasNUsesOfValue(VT.getVectorNumElements(), 0))
5164 case ISD::VECTOR_SHUFFLE: {
5165 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
5167 // Shuffles must have a splat mask where the first element is
5169 if ((!SVOp->isSplat()) || SVOp->getMaskElt(0) != 0)
5172 SDValue Sc = Op.getOperand(0);
5173 if (Sc.getOpcode() != ISD::SCALAR_TO_VECTOR &&
5174 Sc.getOpcode() != ISD::BUILD_VECTOR) {
5176 if (!Subtarget->hasInt256())
5179 // Use the register form of the broadcast instruction available on AVX2.
5180 if (VT.is256BitVector())
5181 Sc = Extract128BitVector(Sc, 0, DAG, dl);
5182 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Sc);
5185 Ld = Sc.getOperand(0);
5186 ConstSplatVal = (Ld.getOpcode() == ISD::Constant ||
5187 Ld.getOpcode() == ISD::ConstantFP);
5189 // The scalar_to_vector node and the suspected
5190 // load node must have exactly one user.
5191 // Constants may have multiple users.
5192 if (!ConstSplatVal && (!Sc.hasOneUse() || !Ld.hasOneUse()))
5198 bool Is256 = VT.is256BitVector();
5200 // Handle the broadcasting a single constant scalar from the constant pool
5201 // into a vector. On Sandybridge it is still better to load a constant vector
5202 // from the constant pool and not to broadcast it from a scalar.
5203 if (ConstSplatVal && Subtarget->hasInt256()) {
5204 EVT CVT = Ld.getValueType();
5205 assert(!CVT.isVector() && "Must not broadcast a vector type");
5206 unsigned ScalarSize = CVT.getSizeInBits();
5208 if (ScalarSize == 32 || (Is256 && ScalarSize == 64)) {
5209 const Constant *C = 0;
5210 if (ConstantSDNode *CI = dyn_cast<ConstantSDNode>(Ld))
5211 C = CI->getConstantIntValue();
5212 else if (ConstantFPSDNode *CF = dyn_cast<ConstantFPSDNode>(Ld))
5213 C = CF->getConstantFPValue();
5215 assert(C && "Invalid constant type");
5217 SDValue CP = DAG.getConstantPool(C, getPointerTy());
5218 unsigned Alignment = cast<ConstantPoolSDNode>(CP)->getAlignment();
5219 Ld = DAG.getLoad(CVT, dl, DAG.getEntryNode(), CP,
5220 MachinePointerInfo::getConstantPool(),
5221 false, false, false, Alignment);
5223 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld);
5227 bool IsLoad = ISD::isNormalLoad(Ld.getNode());
5228 unsigned ScalarSize = Ld.getValueType().getSizeInBits();
5230 // Handle AVX2 in-register broadcasts.
5231 if (!IsLoad && Subtarget->hasInt256() &&
5232 (ScalarSize == 32 || (Is256 && ScalarSize == 64)))
5233 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld);
5235 // The scalar source must be a normal load.
5239 if (ScalarSize == 32 || (Is256 && ScalarSize == 64))
5240 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld);
5242 // The integer check is needed for the 64-bit into 128-bit so it doesn't match
5243 // double since there is no vbroadcastsd xmm
5244 if (Subtarget->hasInt256() && Ld.getValueType().isInteger()) {
5245 if (ScalarSize == 8 || ScalarSize == 16 || ScalarSize == 64)
5246 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld);
5249 // Unsupported broadcast.
5254 X86TargetLowering::buildFromShuffleMostly(SDValue Op, SelectionDAG &DAG) const {
5255 EVT VT = Op.getValueType();
5257 // Skip if insert_vec_elt is not supported.
5258 if (!isOperationLegalOrCustom(ISD::INSERT_VECTOR_ELT, VT))
5261 DebugLoc DL = Op.getDebugLoc();
5262 unsigned NumElems = Op.getNumOperands();
5266 SmallVector<unsigned, 4> InsertIndices;
5267 SmallVector<int, 8> Mask(NumElems, -1);
5269 for (unsigned i = 0; i != NumElems; ++i) {
5270 unsigned Opc = Op.getOperand(i).getOpcode();
5272 if (Opc == ISD::UNDEF)
5275 if (Opc != ISD::EXTRACT_VECTOR_ELT) {
5276 // Quit if more than 1 elements need inserting.
5277 if (InsertIndices.size() > 1)
5280 InsertIndices.push_back(i);
5284 SDValue ExtractedFromVec = Op.getOperand(i).getOperand(0);
5285 SDValue ExtIdx = Op.getOperand(i).getOperand(1);
5287 // Quit if extracted from vector of different type.
5288 if (ExtractedFromVec.getValueType() != VT)
5291 // Quit if non-constant index.
5292 if (!isa<ConstantSDNode>(ExtIdx))
5295 if (VecIn1.getNode() == 0)
5296 VecIn1 = ExtractedFromVec;
5297 else if (VecIn1 != ExtractedFromVec) {
5298 if (VecIn2.getNode() == 0)
5299 VecIn2 = ExtractedFromVec;
5300 else if (VecIn2 != ExtractedFromVec)
5301 // Quit if more than 2 vectors to shuffle
5305 unsigned Idx = cast<ConstantSDNode>(ExtIdx)->getZExtValue();
5307 if (ExtractedFromVec == VecIn1)
5309 else if (ExtractedFromVec == VecIn2)
5310 Mask[i] = Idx + NumElems;
5313 if (VecIn1.getNode() == 0)
5316 VecIn2 = VecIn2.getNode() ? VecIn2 : DAG.getUNDEF(VT);
5317 SDValue NV = DAG.getVectorShuffle(VT, DL, VecIn1, VecIn2, &Mask[0]);
5318 for (unsigned i = 0, e = InsertIndices.size(); i != e; ++i) {
5319 unsigned Idx = InsertIndices[i];
5320 NV = DAG.getNode(ISD::INSERT_VECTOR_ELT, DL, VT, NV, Op.getOperand(Idx),
5321 DAG.getIntPtrConstant(Idx));
5328 X86TargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const {
5329 DebugLoc dl = Op.getDebugLoc();
5331 MVT VT = Op.getValueType().getSimpleVT();
5332 MVT ExtVT = VT.getVectorElementType();
5333 unsigned NumElems = Op.getNumOperands();
5335 // Vectors containing all zeros can be matched by pxor and xorps later
5336 if (ISD::isBuildVectorAllZeros(Op.getNode())) {
5337 // Canonicalize this to <4 x i32> to 1) ensure the zero vectors are CSE'd
5338 // and 2) ensure that i64 scalars are eliminated on x86-32 hosts.
5339 if (VT == MVT::v4i32 || VT == MVT::v8i32)
5342 return getZeroVector(VT, Subtarget, DAG, dl);
5345 // Vectors containing all ones can be matched by pcmpeqd on 128-bit width
5346 // vectors or broken into v4i32 operations on 256-bit vectors. AVX2 can use
5347 // vpcmpeqd on 256-bit vectors.
5348 if (Subtarget->hasSSE2() && ISD::isBuildVectorAllOnes(Op.getNode())) {
5349 if (VT == MVT::v4i32 || (VT == MVT::v8i32 && Subtarget->hasInt256()))
5352 return getOnesVector(VT, Subtarget->hasInt256(), DAG, dl);
5355 SDValue Broadcast = LowerVectorBroadcast(Op, DAG);
5356 if (Broadcast.getNode())
5359 unsigned EVTBits = ExtVT.getSizeInBits();
5361 unsigned NumZero = 0;
5362 unsigned NumNonZero = 0;
5363 unsigned NonZeros = 0;
5364 bool IsAllConstants = true;
5365 SmallSet<SDValue, 8> Values;
5366 for (unsigned i = 0; i < NumElems; ++i) {
5367 SDValue Elt = Op.getOperand(i);
5368 if (Elt.getOpcode() == ISD::UNDEF)
5371 if (Elt.getOpcode() != ISD::Constant &&
5372 Elt.getOpcode() != ISD::ConstantFP)
5373 IsAllConstants = false;
5374 if (X86::isZeroNode(Elt))
5377 NonZeros |= (1 << i);
5382 // All undef vector. Return an UNDEF. All zero vectors were handled above.
5383 if (NumNonZero == 0)
5384 return DAG.getUNDEF(VT);
5386 // Special case for single non-zero, non-undef, element.
5387 if (NumNonZero == 1) {
5388 unsigned Idx = CountTrailingZeros_32(NonZeros);
5389 SDValue Item = Op.getOperand(Idx);
5391 // If this is an insertion of an i64 value on x86-32, and if the top bits of
5392 // the value are obviously zero, truncate the value to i32 and do the
5393 // insertion that way. Only do this if the value is non-constant or if the
5394 // value is a constant being inserted into element 0. It is cheaper to do
5395 // a constant pool load than it is to do a movd + shuffle.
5396 if (ExtVT == MVT::i64 && !Subtarget->is64Bit() &&
5397 (!IsAllConstants || Idx == 0)) {
5398 if (DAG.MaskedValueIsZero(Item, APInt::getBitsSet(64, 32, 64))) {
5400 assert(VT == MVT::v2i64 && "Expected an SSE value type!");
5401 EVT VecVT = MVT::v4i32;
5402 unsigned VecElts = 4;
5404 // Truncate the value (which may itself be a constant) to i32, and
5405 // convert it to a vector with movd (S2V+shuffle to zero extend).
5406 Item = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, Item);
5407 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VecVT, Item);
5408 Item = getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
5410 // Now we have our 32-bit value zero extended in the low element of
5411 // a vector. If Idx != 0, swizzle it into place.
5413 SmallVector<int, 4> Mask;
5414 Mask.push_back(Idx);
5415 for (unsigned i = 1; i != VecElts; ++i)
5417 Item = DAG.getVectorShuffle(VecVT, dl, Item, DAG.getUNDEF(VecVT),
5420 return DAG.getNode(ISD::BITCAST, dl, VT, Item);
5424 // If we have a constant or non-constant insertion into the low element of
5425 // a vector, we can do this with SCALAR_TO_VECTOR + shuffle of zero into
5426 // the rest of the elements. This will be matched as movd/movq/movss/movsd
5427 // depending on what the source datatype is.
5430 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
5432 if (ExtVT == MVT::i32 || ExtVT == MVT::f32 || ExtVT == MVT::f64 ||
5433 (ExtVT == MVT::i64 && Subtarget->is64Bit())) {
5434 if (VT.is256BitVector()) {
5435 SDValue ZeroVec = getZeroVector(VT, Subtarget, DAG, dl);
5436 return DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, ZeroVec,
5437 Item, DAG.getIntPtrConstant(0));
5439 assert(VT.is128BitVector() && "Expected an SSE value type!");
5440 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
5441 // Turn it into a MOVL (i.e. movss, movsd, or movd) to a zero vector.
5442 return getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
5445 if (ExtVT == MVT::i16 || ExtVT == MVT::i8) {
5446 Item = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, Item);
5447 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32, Item);
5448 if (VT.is256BitVector()) {
5449 SDValue ZeroVec = getZeroVector(MVT::v8i32, Subtarget, DAG, dl);
5450 Item = Insert128BitVector(ZeroVec, Item, 0, DAG, dl);
5452 assert(VT.is128BitVector() && "Expected an SSE value type!");
5453 Item = getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
5455 return DAG.getNode(ISD::BITCAST, dl, VT, Item);
5459 // Is it a vector logical left shift?
5460 if (NumElems == 2 && Idx == 1 &&
5461 X86::isZeroNode(Op.getOperand(0)) &&
5462 !X86::isZeroNode(Op.getOperand(1))) {
5463 unsigned NumBits = VT.getSizeInBits();
5464 return getVShift(true, VT,
5465 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
5466 VT, Op.getOperand(1)),
5467 NumBits/2, DAG, *this, dl);
5470 if (IsAllConstants) // Otherwise, it's better to do a constpool load.
5473 // Otherwise, if this is a vector with i32 or f32 elements, and the element
5474 // is a non-constant being inserted into an element other than the low one,
5475 // we can't use a constant pool load. Instead, use SCALAR_TO_VECTOR (aka
5476 // movd/movss) to move this into the low element, then shuffle it into
5478 if (EVTBits == 32) {
5479 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
5481 // Turn it into a shuffle of zero and zero-extended scalar to vector.
5482 Item = getShuffleVectorZeroOrUndef(Item, 0, NumZero > 0, Subtarget, DAG);
5483 SmallVector<int, 8> MaskVec;
5484 for (unsigned i = 0; i != NumElems; ++i)
5485 MaskVec.push_back(i == Idx ? 0 : 1);
5486 return DAG.getVectorShuffle(VT, dl, Item, DAG.getUNDEF(VT), &MaskVec[0]);
5490 // Splat is obviously ok. Let legalizer expand it to a shuffle.
5491 if (Values.size() == 1) {
5492 if (EVTBits == 32) {
5493 // Instead of a shuffle like this:
5494 // shuffle (scalar_to_vector (load (ptr + 4))), undef, <0, 0, 0, 0>
5495 // Check if it's possible to issue this instead.
5496 // shuffle (vload ptr)), undef, <1, 1, 1, 1>
5497 unsigned Idx = CountTrailingZeros_32(NonZeros);
5498 SDValue Item = Op.getOperand(Idx);
5499 if (Op.getNode()->isOnlyUserOf(Item.getNode()))
5500 return LowerAsSplatVectorLoad(Item, VT, dl, DAG);
5505 // A vector full of immediates; various special cases are already
5506 // handled, so this is best done with a single constant-pool load.
5510 // For AVX-length vectors, build the individual 128-bit pieces and use
5511 // shuffles to put them in place.
5512 if (VT.is256BitVector()) {
5513 SmallVector<SDValue, 32> V;
5514 for (unsigned i = 0; i != NumElems; ++i)
5515 V.push_back(Op.getOperand(i));
5517 EVT HVT = EVT::getVectorVT(*DAG.getContext(), ExtVT, NumElems/2);
5519 // Build both the lower and upper subvector.
5520 SDValue Lower = DAG.getNode(ISD::BUILD_VECTOR, dl, HVT, &V[0], NumElems/2);
5521 SDValue Upper = DAG.getNode(ISD::BUILD_VECTOR, dl, HVT, &V[NumElems / 2],
5524 // Recreate the wider vector with the lower and upper part.
5525 return Concat128BitVectors(Lower, Upper, VT, NumElems, DAG, dl);
5528 // Let legalizer expand 2-wide build_vectors.
5529 if (EVTBits == 64) {
5530 if (NumNonZero == 1) {
5531 // One half is zero or undef.
5532 unsigned Idx = CountTrailingZeros_32(NonZeros);
5533 SDValue V2 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT,
5534 Op.getOperand(Idx));
5535 return getShuffleVectorZeroOrUndef(V2, Idx, true, Subtarget, DAG);
5540 // If element VT is < 32 bits, convert it to inserts into a zero vector.
5541 if (EVTBits == 8 && NumElems == 16) {
5542 SDValue V = LowerBuildVectorv16i8(Op, NonZeros,NumNonZero,NumZero, DAG,
5544 if (V.getNode()) return V;
5547 if (EVTBits == 16 && NumElems == 8) {
5548 SDValue V = LowerBuildVectorv8i16(Op, NonZeros,NumNonZero,NumZero, DAG,
5550 if (V.getNode()) return V;
5553 // If element VT is == 32 bits, turn it into a number of shuffles.
5554 SmallVector<SDValue, 8> V(NumElems);
5555 if (NumElems == 4 && NumZero > 0) {
5556 for (unsigned i = 0; i < 4; ++i) {
5557 bool isZero = !(NonZeros & (1 << i));
5559 V[i] = getZeroVector(VT, Subtarget, DAG, dl);
5561 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
5564 for (unsigned i = 0; i < 2; ++i) {
5565 switch ((NonZeros & (0x3 << i*2)) >> (i*2)) {
5568 V[i] = V[i*2]; // Must be a zero vector.
5571 V[i] = getMOVL(DAG, dl, VT, V[i*2+1], V[i*2]);
5574 V[i] = getMOVL(DAG, dl, VT, V[i*2], V[i*2+1]);
5577 V[i] = getUnpackl(DAG, dl, VT, V[i*2], V[i*2+1]);
5582 bool Reverse1 = (NonZeros & 0x3) == 2;
5583 bool Reverse2 = ((NonZeros & (0x3 << 2)) >> 2) == 2;
5587 static_cast<int>(Reverse2 ? NumElems+1 : NumElems),
5588 static_cast<int>(Reverse2 ? NumElems : NumElems+1)
5590 return DAG.getVectorShuffle(VT, dl, V[0], V[1], &MaskVec[0]);
5593 if (Values.size() > 1 && VT.is128BitVector()) {
5594 // Check for a build vector of consecutive loads.
5595 for (unsigned i = 0; i < NumElems; ++i)
5596 V[i] = Op.getOperand(i);
5598 // Check for elements which are consecutive loads.
5599 SDValue LD = EltsFromConsecutiveLoads(VT, V, dl, DAG);
5603 // Check for a build vector from mostly shuffle plus few inserting.
5604 SDValue Sh = buildFromShuffleMostly(Op, DAG);
5608 // For SSE 4.1, use insertps to put the high elements into the low element.
5609 if (getSubtarget()->hasSSE41()) {
5611 if (Op.getOperand(0).getOpcode() != ISD::UNDEF)
5612 Result = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(0));
5614 Result = DAG.getUNDEF(VT);
5616 for (unsigned i = 1; i < NumElems; ++i) {
5617 if (Op.getOperand(i).getOpcode() == ISD::UNDEF) continue;
5618 Result = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Result,
5619 Op.getOperand(i), DAG.getIntPtrConstant(i));
5624 // Otherwise, expand into a number of unpckl*, start by extending each of
5625 // our (non-undef) elements to the full vector width with the element in the
5626 // bottom slot of the vector (which generates no code for SSE).
5627 for (unsigned i = 0; i < NumElems; ++i) {
5628 if (Op.getOperand(i).getOpcode() != ISD::UNDEF)
5629 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
5631 V[i] = DAG.getUNDEF(VT);
5634 // Next, we iteratively mix elements, e.g. for v4f32:
5635 // Step 1: unpcklps 0, 2 ==> X: <?, ?, 2, 0>
5636 // : unpcklps 1, 3 ==> Y: <?, ?, 3, 1>
5637 // Step 2: unpcklps X, Y ==> <3, 2, 1, 0>
5638 unsigned EltStride = NumElems >> 1;
5639 while (EltStride != 0) {
5640 for (unsigned i = 0; i < EltStride; ++i) {
5641 // If V[i+EltStride] is undef and this is the first round of mixing,
5642 // then it is safe to just drop this shuffle: V[i] is already in the
5643 // right place, the one element (since it's the first round) being
5644 // inserted as undef can be dropped. This isn't safe for successive
5645 // rounds because they will permute elements within both vectors.
5646 if (V[i+EltStride].getOpcode() == ISD::UNDEF &&
5647 EltStride == NumElems/2)
5650 V[i] = getUnpackl(DAG, dl, VT, V[i], V[i + EltStride]);
5659 // LowerAVXCONCAT_VECTORS - 256-bit AVX can use the vinsertf128 instruction
5660 // to create 256-bit vectors from two other 128-bit ones.
5661 static SDValue LowerAVXCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
5662 DebugLoc dl = Op.getDebugLoc();
5663 MVT ResVT = Op.getValueType().getSimpleVT();
5665 assert(ResVT.is256BitVector() && "Value type must be 256-bit wide");
5667 SDValue V1 = Op.getOperand(0);
5668 SDValue V2 = Op.getOperand(1);
5669 unsigned NumElems = ResVT.getVectorNumElements();
5671 return Concat128BitVectors(V1, V2, ResVT, NumElems, DAG, dl);
5674 static SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
5675 assert(Op.getNumOperands() == 2);
5677 // 256-bit AVX can use the vinsertf128 instruction to create 256-bit vectors
5678 // from two other 128-bit ones.
5679 return LowerAVXCONCAT_VECTORS(Op, DAG);
5682 // Try to lower a shuffle node into a simple blend instruction.
5684 LowerVECTOR_SHUFFLEtoBlend(ShuffleVectorSDNode *SVOp,
5685 const X86Subtarget *Subtarget, SelectionDAG &DAG) {
5686 SDValue V1 = SVOp->getOperand(0);
5687 SDValue V2 = SVOp->getOperand(1);
5688 DebugLoc dl = SVOp->getDebugLoc();
5689 MVT VT = SVOp->getValueType(0).getSimpleVT();
5690 MVT EltVT = VT.getVectorElementType();
5691 unsigned NumElems = VT.getVectorNumElements();
5693 if (!Subtarget->hasSSE41() || EltVT == MVT::i8)
5695 if (!Subtarget->hasInt256() && VT == MVT::v16i16)
5698 // Check the mask for BLEND and build the value.
5699 unsigned MaskValue = 0;
5700 // There are 2 lanes if (NumElems > 8), and 1 lane otherwise.
5701 unsigned NumLanes = (NumElems-1)/8 + 1;
5702 unsigned NumElemsInLane = NumElems / NumLanes;
5704 // Blend for v16i16 should be symetric for the both lanes.
5705 for (unsigned i = 0; i < NumElemsInLane; ++i) {
5707 int SndLaneEltIdx = (NumLanes == 2) ?
5708 SVOp->getMaskElt(i + NumElemsInLane) : -1;
5709 int EltIdx = SVOp->getMaskElt(i);
5711 if ((EltIdx < 0 || EltIdx == (int)i) &&
5712 (SndLaneEltIdx < 0 || SndLaneEltIdx == (int)(i + NumElemsInLane)))
5715 if (((unsigned)EltIdx == (i + NumElems)) &&
5716 (SndLaneEltIdx < 0 ||
5717 (unsigned)SndLaneEltIdx == i + NumElems + NumElemsInLane))
5718 MaskValue |= (1<<i);
5723 // Convert i32 vectors to floating point if it is not AVX2.
5724 // AVX2 introduced VPBLENDD instruction for 128 and 256-bit vectors.
5726 if (EltVT == MVT::i64 || (EltVT == MVT::i32 && !Subtarget->hasInt256())) {
5727 BlendVT = MVT::getVectorVT(MVT::getFloatingPointVT(EltVT.getSizeInBits()),
5729 V1 = DAG.getNode(ISD::BITCAST, dl, VT, V1);
5730 V2 = DAG.getNode(ISD::BITCAST, dl, VT, V2);
5733 SDValue Ret = DAG.getNode(X86ISD::BLENDI, dl, BlendVT, V1, V2,
5734 DAG.getConstant(MaskValue, MVT::i32));
5735 return DAG.getNode(ISD::BITCAST, dl, VT, Ret);
5738 // v8i16 shuffles - Prefer shuffles in the following order:
5739 // 1. [all] pshuflw, pshufhw, optional move
5740 // 2. [ssse3] 1 x pshufb
5741 // 3. [ssse3] 2 x pshufb + 1 x por
5742 // 4. [all] mov + pshuflw + pshufhw + N x (pextrw + pinsrw)
5744 LowerVECTOR_SHUFFLEv8i16(SDValue Op, const X86Subtarget *Subtarget,
5745 SelectionDAG &DAG) {
5746 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
5747 SDValue V1 = SVOp->getOperand(0);
5748 SDValue V2 = SVOp->getOperand(1);
5749 DebugLoc dl = SVOp->getDebugLoc();
5750 SmallVector<int, 8> MaskVals;
5752 // Determine if more than 1 of the words in each of the low and high quadwords
5753 // of the result come from the same quadword of one of the two inputs. Undef
5754 // mask values count as coming from any quadword, for better codegen.
5755 unsigned LoQuad[] = { 0, 0, 0, 0 };
5756 unsigned HiQuad[] = { 0, 0, 0, 0 };
5757 std::bitset<4> InputQuads;
5758 for (unsigned i = 0; i < 8; ++i) {
5759 unsigned *Quad = i < 4 ? LoQuad : HiQuad;
5760 int EltIdx = SVOp->getMaskElt(i);
5761 MaskVals.push_back(EltIdx);
5770 InputQuads.set(EltIdx / 4);
5773 int BestLoQuad = -1;
5774 unsigned MaxQuad = 1;
5775 for (unsigned i = 0; i < 4; ++i) {
5776 if (LoQuad[i] > MaxQuad) {
5778 MaxQuad = LoQuad[i];
5782 int BestHiQuad = -1;
5784 for (unsigned i = 0; i < 4; ++i) {
5785 if (HiQuad[i] > MaxQuad) {
5787 MaxQuad = HiQuad[i];
5791 // For SSSE3, If all 8 words of the result come from only 1 quadword of each
5792 // of the two input vectors, shuffle them into one input vector so only a
5793 // single pshufb instruction is necessary. If There are more than 2 input
5794 // quads, disable the next transformation since it does not help SSSE3.
5795 bool V1Used = InputQuads[0] || InputQuads[1];
5796 bool V2Used = InputQuads[2] || InputQuads[3];
5797 if (Subtarget->hasSSSE3()) {
5798 if (InputQuads.count() == 2 && V1Used && V2Used) {
5799 BestLoQuad = InputQuads[0] ? 0 : 1;
5800 BestHiQuad = InputQuads[2] ? 2 : 3;
5802 if (InputQuads.count() > 2) {
5808 // If BestLoQuad or BestHiQuad are set, shuffle the quads together and update
5809 // the shuffle mask. If a quad is scored as -1, that means that it contains
5810 // words from all 4 input quadwords.
5812 if (BestLoQuad >= 0 || BestHiQuad >= 0) {
5814 BestLoQuad < 0 ? 0 : BestLoQuad,
5815 BestHiQuad < 0 ? 1 : BestHiQuad
5817 NewV = DAG.getVectorShuffle(MVT::v2i64, dl,
5818 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V1),
5819 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V2), &MaskV[0]);
5820 NewV = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, NewV);
5822 // Rewrite the MaskVals and assign NewV to V1 if NewV now contains all the
5823 // source words for the shuffle, to aid later transformations.
5824 bool AllWordsInNewV = true;
5825 bool InOrder[2] = { true, true };
5826 for (unsigned i = 0; i != 8; ++i) {
5827 int idx = MaskVals[i];
5829 InOrder[i/4] = false;
5830 if (idx < 0 || (idx/4) == BestLoQuad || (idx/4) == BestHiQuad)
5832 AllWordsInNewV = false;
5836 bool pshuflw = AllWordsInNewV, pshufhw = AllWordsInNewV;
5837 if (AllWordsInNewV) {
5838 for (int i = 0; i != 8; ++i) {
5839 int idx = MaskVals[i];
5842 idx = MaskVals[i] = (idx / 4) == BestLoQuad ? (idx & 3) : (idx & 3) + 4;
5843 if ((idx != i) && idx < 4)
5845 if ((idx != i) && idx > 3)
5854 // If we've eliminated the use of V2, and the new mask is a pshuflw or
5855 // pshufhw, that's as cheap as it gets. Return the new shuffle.
5856 if ((pshufhw && InOrder[0]) || (pshuflw && InOrder[1])) {
5857 unsigned Opc = pshufhw ? X86ISD::PSHUFHW : X86ISD::PSHUFLW;
5858 unsigned TargetMask = 0;
5859 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV,
5860 DAG.getUNDEF(MVT::v8i16), &MaskVals[0]);
5861 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(NewV.getNode());
5862 TargetMask = pshufhw ? getShufflePSHUFHWImmediate(SVOp):
5863 getShufflePSHUFLWImmediate(SVOp);
5864 V1 = NewV.getOperand(0);
5865 return getTargetShuffleNode(Opc, dl, MVT::v8i16, V1, TargetMask, DAG);
5869 // Promote splats to a larger type which usually leads to more efficient code.
5870 // FIXME: Is this true if pshufb is available?
5871 if (SVOp->isSplat())
5872 return PromoteSplat(SVOp, DAG);
5874 // If we have SSSE3, and all words of the result are from 1 input vector,
5875 // case 2 is generated, otherwise case 3 is generated. If no SSSE3
5876 // is present, fall back to case 4.
5877 if (Subtarget->hasSSSE3()) {
5878 SmallVector<SDValue,16> pshufbMask;
5880 // If we have elements from both input vectors, set the high bit of the
5881 // shuffle mask element to zero out elements that come from V2 in the V1
5882 // mask, and elements that come from V1 in the V2 mask, so that the two
5883 // results can be OR'd together.
5884 bool TwoInputs = V1Used && V2Used;
5885 for (unsigned i = 0; i != 8; ++i) {
5886 int EltIdx = MaskVals[i] * 2;
5887 int Idx0 = (TwoInputs && (EltIdx >= 16)) ? 0x80 : EltIdx;
5888 int Idx1 = (TwoInputs && (EltIdx >= 16)) ? 0x80 : EltIdx+1;
5889 pshufbMask.push_back(DAG.getConstant(Idx0, MVT::i8));
5890 pshufbMask.push_back(DAG.getConstant(Idx1, MVT::i8));
5892 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V1);
5893 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
5894 DAG.getNode(ISD::BUILD_VECTOR, dl,
5895 MVT::v16i8, &pshufbMask[0], 16));
5897 return DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
5899 // Calculate the shuffle mask for the second input, shuffle it, and
5900 // OR it with the first shuffled input.
5902 for (unsigned i = 0; i != 8; ++i) {
5903 int EltIdx = MaskVals[i] * 2;
5904 int Idx0 = (EltIdx < 16) ? 0x80 : EltIdx - 16;
5905 int Idx1 = (EltIdx < 16) ? 0x80 : EltIdx - 15;
5906 pshufbMask.push_back(DAG.getConstant(Idx0, MVT::i8));
5907 pshufbMask.push_back(DAG.getConstant(Idx1, MVT::i8));
5909 V2 = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V2);
5910 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
5911 DAG.getNode(ISD::BUILD_VECTOR, dl,
5912 MVT::v16i8, &pshufbMask[0], 16));
5913 V1 = DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
5914 return DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
5917 // If BestLoQuad >= 0, generate a pshuflw to put the low elements in order,
5918 // and update MaskVals with new element order.
5919 std::bitset<8> InOrder;
5920 if (BestLoQuad >= 0) {
5921 int MaskV[] = { -1, -1, -1, -1, 4, 5, 6, 7 };
5922 for (int i = 0; i != 4; ++i) {
5923 int idx = MaskVals[i];
5926 } else if ((idx / 4) == BestLoQuad) {
5931 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV, DAG.getUNDEF(MVT::v8i16),
5934 if (NewV.getOpcode() == ISD::VECTOR_SHUFFLE && Subtarget->hasSSSE3()) {
5935 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(NewV.getNode());
5936 NewV = getTargetShuffleNode(X86ISD::PSHUFLW, dl, MVT::v8i16,
5938 getShufflePSHUFLWImmediate(SVOp), DAG);
5942 // If BestHi >= 0, generate a pshufhw to put the high elements in order,
5943 // and update MaskVals with the new element order.
5944 if (BestHiQuad >= 0) {
5945 int MaskV[] = { 0, 1, 2, 3, -1, -1, -1, -1 };
5946 for (unsigned i = 4; i != 8; ++i) {
5947 int idx = MaskVals[i];
5950 } else if ((idx / 4) == BestHiQuad) {
5951 MaskV[i] = (idx & 3) + 4;
5955 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV, DAG.getUNDEF(MVT::v8i16),
5958 if (NewV.getOpcode() == ISD::VECTOR_SHUFFLE && Subtarget->hasSSSE3()) {
5959 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(NewV.getNode());
5960 NewV = getTargetShuffleNode(X86ISD::PSHUFHW, dl, MVT::v8i16,
5962 getShufflePSHUFHWImmediate(SVOp), DAG);
5966 // In case BestHi & BestLo were both -1, which means each quadword has a word
5967 // from each of the four input quadwords, calculate the InOrder bitvector now
5968 // before falling through to the insert/extract cleanup.
5969 if (BestLoQuad == -1 && BestHiQuad == -1) {
5971 for (int i = 0; i != 8; ++i)
5972 if (MaskVals[i] < 0 || MaskVals[i] == i)
5976 // The other elements are put in the right place using pextrw and pinsrw.
5977 for (unsigned i = 0; i != 8; ++i) {
5980 int EltIdx = MaskVals[i];
5983 SDValue ExtOp = (EltIdx < 8) ?
5984 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V1,
5985 DAG.getIntPtrConstant(EltIdx)) :
5986 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V2,
5987 DAG.getIntPtrConstant(EltIdx - 8));
5988 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, ExtOp,
5989 DAG.getIntPtrConstant(i));
5994 // v16i8 shuffles - Prefer shuffles in the following order:
5995 // 1. [ssse3] 1 x pshufb
5996 // 2. [ssse3] 2 x pshufb + 1 x por
5997 // 3. [all] v8i16 shuffle + N x pextrw + rotate + pinsrw
5999 SDValue LowerVECTOR_SHUFFLEv16i8(ShuffleVectorSDNode *SVOp,
6001 const X86TargetLowering &TLI) {
6002 SDValue V1 = SVOp->getOperand(0);
6003 SDValue V2 = SVOp->getOperand(1);
6004 DebugLoc dl = SVOp->getDebugLoc();
6005 ArrayRef<int> MaskVals = SVOp->getMask();
6007 // Promote splats to a larger type which usually leads to more efficient code.
6008 // FIXME: Is this true if pshufb is available?
6009 if (SVOp->isSplat())
6010 return PromoteSplat(SVOp, DAG);
6012 // If we have SSSE3, case 1 is generated when all result bytes come from
6013 // one of the inputs. Otherwise, case 2 is generated. If no SSSE3 is
6014 // present, fall back to case 3.
6016 // If SSSE3, use 1 pshufb instruction per vector with elements in the result.
6017 if (TLI.getSubtarget()->hasSSSE3()) {
6018 SmallVector<SDValue,16> pshufbMask;
6020 // If all result elements are from one input vector, then only translate
6021 // undef mask values to 0x80 (zero out result) in the pshufb mask.
6023 // Otherwise, we have elements from both input vectors, and must zero out
6024 // elements that come from V2 in the first mask, and V1 in the second mask
6025 // so that we can OR them together.
6026 for (unsigned i = 0; i != 16; ++i) {
6027 int EltIdx = MaskVals[i];
6028 if (EltIdx < 0 || EltIdx >= 16)
6030 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
6032 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
6033 DAG.getNode(ISD::BUILD_VECTOR, dl,
6034 MVT::v16i8, &pshufbMask[0], 16));
6036 // As PSHUFB will zero elements with negative indices, it's safe to ignore
6037 // the 2nd operand if it's undefined or zero.
6038 if (V2.getOpcode() == ISD::UNDEF ||
6039 ISD::isBuildVectorAllZeros(V2.getNode()))
6042 // Calculate the shuffle mask for the second input, shuffle it, and
6043 // OR it with the first shuffled input.
6045 for (unsigned i = 0; i != 16; ++i) {
6046 int EltIdx = MaskVals[i];
6047 EltIdx = (EltIdx < 16) ? 0x80 : EltIdx - 16;
6048 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
6050 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
6051 DAG.getNode(ISD::BUILD_VECTOR, dl,
6052 MVT::v16i8, &pshufbMask[0], 16));
6053 return DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
6056 // No SSSE3 - Calculate in place words and then fix all out of place words
6057 // With 0-16 extracts & inserts. Worst case is 16 bytes out of order from
6058 // the 16 different words that comprise the two doublequadword input vectors.
6059 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
6060 V2 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V2);
6062 for (int i = 0; i != 8; ++i) {
6063 int Elt0 = MaskVals[i*2];
6064 int Elt1 = MaskVals[i*2+1];
6066 // This word of the result is all undef, skip it.
6067 if (Elt0 < 0 && Elt1 < 0)
6070 // This word of the result is already in the correct place, skip it.
6071 if ((Elt0 == i*2) && (Elt1 == i*2+1))
6074 SDValue Elt0Src = Elt0 < 16 ? V1 : V2;
6075 SDValue Elt1Src = Elt1 < 16 ? V1 : V2;
6078 // If Elt0 and Elt1 are defined, are consecutive, and can be load
6079 // using a single extract together, load it and store it.
6080 if ((Elt0 >= 0) && ((Elt0 + 1) == Elt1) && ((Elt0 & 1) == 0)) {
6081 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
6082 DAG.getIntPtrConstant(Elt1 / 2));
6083 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
6084 DAG.getIntPtrConstant(i));
6088 // If Elt1 is defined, extract it from the appropriate source. If the
6089 // source byte is not also odd, shift the extracted word left 8 bits
6090 // otherwise clear the bottom 8 bits if we need to do an or.
6092 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
6093 DAG.getIntPtrConstant(Elt1 / 2));
6094 if ((Elt1 & 1) == 0)
6095 InsElt = DAG.getNode(ISD::SHL, dl, MVT::i16, InsElt,
6097 TLI.getShiftAmountTy(InsElt.getValueType())));
6099 InsElt = DAG.getNode(ISD::AND, dl, MVT::i16, InsElt,
6100 DAG.getConstant(0xFF00, MVT::i16));
6102 // If Elt0 is defined, extract it from the appropriate source. If the
6103 // source byte is not also even, shift the extracted word right 8 bits. If
6104 // Elt1 was also defined, OR the extracted values together before
6105 // inserting them in the result.
6107 SDValue InsElt0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16,
6108 Elt0Src, DAG.getIntPtrConstant(Elt0 / 2));
6109 if ((Elt0 & 1) != 0)
6110 InsElt0 = DAG.getNode(ISD::SRL, dl, MVT::i16, InsElt0,
6112 TLI.getShiftAmountTy(InsElt0.getValueType())));
6114 InsElt0 = DAG.getNode(ISD::AND, dl, MVT::i16, InsElt0,
6115 DAG.getConstant(0x00FF, MVT::i16));
6116 InsElt = Elt1 >= 0 ? DAG.getNode(ISD::OR, dl, MVT::i16, InsElt, InsElt0)
6119 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
6120 DAG.getIntPtrConstant(i));
6122 return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, NewV);
6125 // v32i8 shuffles - Translate to VPSHUFB if possible.
6127 SDValue LowerVECTOR_SHUFFLEv32i8(ShuffleVectorSDNode *SVOp,
6128 const X86Subtarget *Subtarget,
6129 SelectionDAG &DAG) {
6130 MVT VT = SVOp->getValueType(0).getSimpleVT();
6131 SDValue V1 = SVOp->getOperand(0);
6132 SDValue V2 = SVOp->getOperand(1);
6133 DebugLoc dl = SVOp->getDebugLoc();
6134 SmallVector<int, 32> MaskVals(SVOp->getMask().begin(), SVOp->getMask().end());
6136 bool V2IsUndef = V2.getOpcode() == ISD::UNDEF;
6137 bool V1IsAllZero = ISD::isBuildVectorAllZeros(V1.getNode());
6138 bool V2IsAllZero = ISD::isBuildVectorAllZeros(V2.getNode());
6140 // VPSHUFB may be generated if
6141 // (1) one of input vector is undefined or zeroinitializer.
6142 // The mask value 0x80 puts 0 in the corresponding slot of the vector.
6143 // And (2) the mask indexes don't cross the 128-bit lane.
6144 if (VT != MVT::v32i8 || !Subtarget->hasInt256() ||
6145 (!V2IsUndef && !V2IsAllZero && !V1IsAllZero))
6148 if (V1IsAllZero && !V2IsAllZero) {
6149 CommuteVectorShuffleMask(MaskVals, 32);
6152 SmallVector<SDValue, 32> pshufbMask;
6153 for (unsigned i = 0; i != 32; i++) {
6154 int EltIdx = MaskVals[i];
6155 if (EltIdx < 0 || EltIdx >= 32)
6158 if ((EltIdx >= 16 && i < 16) || (EltIdx < 16 && i >= 16))
6159 // Cross lane is not allowed.
6163 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
6165 return DAG.getNode(X86ISD::PSHUFB, dl, MVT::v32i8, V1,
6166 DAG.getNode(ISD::BUILD_VECTOR, dl,
6167 MVT::v32i8, &pshufbMask[0], 32));
6170 /// RewriteAsNarrowerShuffle - Try rewriting v8i16 and v16i8 shuffles as 4 wide
6171 /// ones, or rewriting v4i32 / v4f32 as 2 wide ones if possible. This can be
6172 /// done when every pair / quad of shuffle mask elements point to elements in
6173 /// the right sequence. e.g.
6174 /// vector_shuffle X, Y, <2, 3, | 10, 11, | 0, 1, | 14, 15>
6176 SDValue RewriteAsNarrowerShuffle(ShuffleVectorSDNode *SVOp,
6177 SelectionDAG &DAG) {
6178 MVT VT = SVOp->getValueType(0).getSimpleVT();
6179 DebugLoc dl = SVOp->getDebugLoc();
6180 unsigned NumElems = VT.getVectorNumElements();
6183 switch (VT.SimpleTy) {
6184 default: llvm_unreachable("Unexpected!");
6185 case MVT::v4f32: NewVT = MVT::v2f64; Scale = 2; break;
6186 case MVT::v4i32: NewVT = MVT::v2i64; Scale = 2; break;
6187 case MVT::v8i16: NewVT = MVT::v4i32; Scale = 2; break;
6188 case MVT::v16i8: NewVT = MVT::v4i32; Scale = 4; break;
6189 case MVT::v16i16: NewVT = MVT::v8i32; Scale = 2; break;
6190 case MVT::v32i8: NewVT = MVT::v8i32; Scale = 4; break;
6193 SmallVector<int, 8> MaskVec;
6194 for (unsigned i = 0; i != NumElems; i += Scale) {
6196 for (unsigned j = 0; j != Scale; ++j) {
6197 int EltIdx = SVOp->getMaskElt(i+j);
6201 StartIdx = (EltIdx / Scale);
6202 if (EltIdx != (int)(StartIdx*Scale + j))
6205 MaskVec.push_back(StartIdx);
6208 SDValue V1 = DAG.getNode(ISD::BITCAST, dl, NewVT, SVOp->getOperand(0));
6209 SDValue V2 = DAG.getNode(ISD::BITCAST, dl, NewVT, SVOp->getOperand(1));
6210 return DAG.getVectorShuffle(NewVT, dl, V1, V2, &MaskVec[0]);
6213 /// getVZextMovL - Return a zero-extending vector move low node.
6215 static SDValue getVZextMovL(MVT VT, EVT OpVT,
6216 SDValue SrcOp, SelectionDAG &DAG,
6217 const X86Subtarget *Subtarget, DebugLoc dl) {
6218 if (VT == MVT::v2f64 || VT == MVT::v4f32) {
6219 LoadSDNode *LD = NULL;
6220 if (!isScalarLoadToVector(SrcOp.getNode(), &LD))
6221 LD = dyn_cast<LoadSDNode>(SrcOp);
6223 // movssrr and movsdrr do not clear top bits. Try to use movd, movq
6225 MVT ExtVT = (OpVT == MVT::v2f64) ? MVT::i64 : MVT::i32;
6226 if ((ExtVT != MVT::i64 || Subtarget->is64Bit()) &&
6227 SrcOp.getOpcode() == ISD::SCALAR_TO_VECTOR &&
6228 SrcOp.getOperand(0).getOpcode() == ISD::BITCAST &&
6229 SrcOp.getOperand(0).getOperand(0).getValueType() == ExtVT) {
6231 OpVT = (OpVT == MVT::v2f64) ? MVT::v2i64 : MVT::v4i32;
6232 return DAG.getNode(ISD::BITCAST, dl, VT,
6233 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
6234 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
6242 return DAG.getNode(ISD::BITCAST, dl, VT,
6243 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
6244 DAG.getNode(ISD::BITCAST, dl,
6248 /// LowerVECTOR_SHUFFLE_256 - Handle all 256-bit wide vectors shuffles
6249 /// which could not be matched by any known target speficic shuffle
6251 LowerVECTOR_SHUFFLE_256(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
6253 SDValue NewOp = Compact8x32ShuffleNode(SVOp, DAG);
6254 if (NewOp.getNode())
6257 MVT VT = SVOp->getValueType(0).getSimpleVT();
6259 unsigned NumElems = VT.getVectorNumElements();
6260 unsigned NumLaneElems = NumElems / 2;
6262 DebugLoc dl = SVOp->getDebugLoc();
6263 MVT EltVT = VT.getVectorElementType();
6264 MVT NVT = MVT::getVectorVT(EltVT, NumLaneElems);
6267 SmallVector<int, 16> Mask;
6268 for (unsigned l = 0; l < 2; ++l) {
6269 // Build a shuffle mask for the output, discovering on the fly which
6270 // input vectors to use as shuffle operands (recorded in InputUsed).
6271 // If building a suitable shuffle vector proves too hard, then bail
6272 // out with UseBuildVector set.
6273 bool UseBuildVector = false;
6274 int InputUsed[2] = { -1, -1 }; // Not yet discovered.
6275 unsigned LaneStart = l * NumLaneElems;
6276 for (unsigned i = 0; i != NumLaneElems; ++i) {
6277 // The mask element. This indexes into the input.
6278 int Idx = SVOp->getMaskElt(i+LaneStart);
6280 // the mask element does not index into any input vector.
6285 // The input vector this mask element indexes into.
6286 int Input = Idx / NumLaneElems;
6288 // Turn the index into an offset from the start of the input vector.
6289 Idx -= Input * NumLaneElems;
6291 // Find or create a shuffle vector operand to hold this input.
6293 for (OpNo = 0; OpNo < array_lengthof(InputUsed); ++OpNo) {
6294 if (InputUsed[OpNo] == Input)
6295 // This input vector is already an operand.
6297 if (InputUsed[OpNo] < 0) {
6298 // Create a new operand for this input vector.
6299 InputUsed[OpNo] = Input;
6304 if (OpNo >= array_lengthof(InputUsed)) {
6305 // More than two input vectors used! Give up on trying to create a
6306 // shuffle vector. Insert all elements into a BUILD_VECTOR instead.
6307 UseBuildVector = true;
6311 // Add the mask index for the new shuffle vector.
6312 Mask.push_back(Idx + OpNo * NumLaneElems);
6315 if (UseBuildVector) {
6316 SmallVector<SDValue, 16> SVOps;
6317 for (unsigned i = 0; i != NumLaneElems; ++i) {
6318 // The mask element. This indexes into the input.
6319 int Idx = SVOp->getMaskElt(i+LaneStart);
6321 SVOps.push_back(DAG.getUNDEF(EltVT));
6325 // The input vector this mask element indexes into.
6326 int Input = Idx / NumElems;
6328 // Turn the index into an offset from the start of the input vector.
6329 Idx -= Input * NumElems;
6331 // Extract the vector element by hand.
6332 SVOps.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT,
6333 SVOp->getOperand(Input),
6334 DAG.getIntPtrConstant(Idx)));
6337 // Construct the output using a BUILD_VECTOR.
6338 Output[l] = DAG.getNode(ISD::BUILD_VECTOR, dl, NVT, &SVOps[0],
6340 } else if (InputUsed[0] < 0) {
6341 // No input vectors were used! The result is undefined.
6342 Output[l] = DAG.getUNDEF(NVT);
6344 SDValue Op0 = Extract128BitVector(SVOp->getOperand(InputUsed[0] / 2),
6345 (InputUsed[0] % 2) * NumLaneElems,
6347 // If only one input was used, use an undefined vector for the other.
6348 SDValue Op1 = (InputUsed[1] < 0) ? DAG.getUNDEF(NVT) :
6349 Extract128BitVector(SVOp->getOperand(InputUsed[1] / 2),
6350 (InputUsed[1] % 2) * NumLaneElems, DAG, dl);
6351 // At least one input vector was used. Create a new shuffle vector.
6352 Output[l] = DAG.getVectorShuffle(NVT, dl, Op0, Op1, &Mask[0]);
6358 // Concatenate the result back
6359 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, Output[0], Output[1]);
6362 /// LowerVECTOR_SHUFFLE_128v4 - Handle all 128-bit wide vectors with
6363 /// 4 elements, and match them with several different shuffle types.
6365 LowerVECTOR_SHUFFLE_128v4(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
6366 SDValue V1 = SVOp->getOperand(0);
6367 SDValue V2 = SVOp->getOperand(1);
6368 DebugLoc dl = SVOp->getDebugLoc();
6369 MVT VT = SVOp->getValueType(0).getSimpleVT();
6371 assert(VT.is128BitVector() && "Unsupported vector size");
6373 std::pair<int, int> Locs[4];
6374 int Mask1[] = { -1, -1, -1, -1 };
6375 SmallVector<int, 8> PermMask(SVOp->getMask().begin(), SVOp->getMask().end());
6379 for (unsigned i = 0; i != 4; ++i) {
6380 int Idx = PermMask[i];
6382 Locs[i] = std::make_pair(-1, -1);
6384 assert(Idx < 8 && "Invalid VECTOR_SHUFFLE index!");
6386 Locs[i] = std::make_pair(0, NumLo);
6390 Locs[i] = std::make_pair(1, NumHi);
6392 Mask1[2+NumHi] = Idx;
6398 if (NumLo <= 2 && NumHi <= 2) {
6399 // If no more than two elements come from either vector. This can be
6400 // implemented with two shuffles. First shuffle gather the elements.
6401 // The second shuffle, which takes the first shuffle as both of its
6402 // vector operands, put the elements into the right order.
6403 V1 = DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
6405 int Mask2[] = { -1, -1, -1, -1 };
6407 for (unsigned i = 0; i != 4; ++i)
6408 if (Locs[i].first != -1) {
6409 unsigned Idx = (i < 2) ? 0 : 4;
6410 Idx += Locs[i].first * 2 + Locs[i].second;
6414 return DAG.getVectorShuffle(VT, dl, V1, V1, &Mask2[0]);
6417 if (NumLo == 3 || NumHi == 3) {
6418 // Otherwise, we must have three elements from one vector, call it X, and
6419 // one element from the other, call it Y. First, use a shufps to build an
6420 // intermediate vector with the one element from Y and the element from X
6421 // that will be in the same half in the final destination (the indexes don't
6422 // matter). Then, use a shufps to build the final vector, taking the half
6423 // containing the element from Y from the intermediate, and the other half
6426 // Normalize it so the 3 elements come from V1.
6427 CommuteVectorShuffleMask(PermMask, 4);
6431 // Find the element from V2.
6433 for (HiIndex = 0; HiIndex < 3; ++HiIndex) {
6434 int Val = PermMask[HiIndex];
6441 Mask1[0] = PermMask[HiIndex];
6443 Mask1[2] = PermMask[HiIndex^1];
6445 V2 = DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
6448 Mask1[0] = PermMask[0];
6449 Mask1[1] = PermMask[1];
6450 Mask1[2] = HiIndex & 1 ? 6 : 4;
6451 Mask1[3] = HiIndex & 1 ? 4 : 6;
6452 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
6455 Mask1[0] = HiIndex & 1 ? 2 : 0;
6456 Mask1[1] = HiIndex & 1 ? 0 : 2;
6457 Mask1[2] = PermMask[2];
6458 Mask1[3] = PermMask[3];
6463 return DAG.getVectorShuffle(VT, dl, V2, V1, &Mask1[0]);
6466 // Break it into (shuffle shuffle_hi, shuffle_lo).
6467 int LoMask[] = { -1, -1, -1, -1 };
6468 int HiMask[] = { -1, -1, -1, -1 };
6470 int *MaskPtr = LoMask;
6471 unsigned MaskIdx = 0;
6474 for (unsigned i = 0; i != 4; ++i) {
6481 int Idx = PermMask[i];
6483 Locs[i] = std::make_pair(-1, -1);
6484 } else if (Idx < 4) {
6485 Locs[i] = std::make_pair(MaskIdx, LoIdx);
6486 MaskPtr[LoIdx] = Idx;
6489 Locs[i] = std::make_pair(MaskIdx, HiIdx);
6490 MaskPtr[HiIdx] = Idx;
6495 SDValue LoShuffle = DAG.getVectorShuffle(VT, dl, V1, V2, &LoMask[0]);
6496 SDValue HiShuffle = DAG.getVectorShuffle(VT, dl, V1, V2, &HiMask[0]);
6497 int MaskOps[] = { -1, -1, -1, -1 };
6498 for (unsigned i = 0; i != 4; ++i)
6499 if (Locs[i].first != -1)
6500 MaskOps[i] = Locs[i].first * 4 + Locs[i].second;
6501 return DAG.getVectorShuffle(VT, dl, LoShuffle, HiShuffle, &MaskOps[0]);
6504 static bool MayFoldVectorLoad(SDValue V) {
6505 while (V.hasOneUse() && V.getOpcode() == ISD::BITCAST)
6506 V = V.getOperand(0);
6508 if (V.hasOneUse() && V.getOpcode() == ISD::SCALAR_TO_VECTOR)
6509 V = V.getOperand(0);
6510 if (V.hasOneUse() && V.getOpcode() == ISD::BUILD_VECTOR &&
6511 V.getNumOperands() == 2 && V.getOperand(1).getOpcode() == ISD::UNDEF)
6512 // BUILD_VECTOR (load), undef
6513 V = V.getOperand(0);
6515 return MayFoldLoad(V);
6519 SDValue getMOVDDup(SDValue &Op, DebugLoc &dl, SDValue V1, SelectionDAG &DAG) {
6520 EVT VT = Op.getValueType();
6522 // Canonizalize to v2f64.
6523 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, V1);
6524 return DAG.getNode(ISD::BITCAST, dl, VT,
6525 getTargetShuffleNode(X86ISD::MOVDDUP, dl, MVT::v2f64,
6530 SDValue getMOVLowToHigh(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG,
6532 SDValue V1 = Op.getOperand(0);
6533 SDValue V2 = Op.getOperand(1);
6534 EVT VT = Op.getValueType();
6536 assert(VT != MVT::v2i64 && "unsupported shuffle type");
6538 if (HasSSE2 && VT == MVT::v2f64)
6539 return getTargetShuffleNode(X86ISD::MOVLHPD, dl, VT, V1, V2, DAG);
6541 // v4f32 or v4i32: canonizalized to v4f32 (which is legal for SSE1)
6542 return DAG.getNode(ISD::BITCAST, dl, VT,
6543 getTargetShuffleNode(X86ISD::MOVLHPS, dl, MVT::v4f32,
6544 DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, V1),
6545 DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, V2), DAG));
6549 SDValue getMOVHighToLow(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG) {
6550 SDValue V1 = Op.getOperand(0);
6551 SDValue V2 = Op.getOperand(1);
6552 EVT VT = Op.getValueType();
6554 assert((VT == MVT::v4i32 || VT == MVT::v4f32) &&
6555 "unsupported shuffle type");
6557 if (V2.getOpcode() == ISD::UNDEF)
6561 return getTargetShuffleNode(X86ISD::MOVHLPS, dl, VT, V1, V2, DAG);
6565 SDValue getMOVLP(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG, bool HasSSE2) {
6566 SDValue V1 = Op.getOperand(0);
6567 SDValue V2 = Op.getOperand(1);
6568 EVT VT = Op.getValueType();
6569 unsigned NumElems = VT.getVectorNumElements();
6571 // Use MOVLPS and MOVLPD in case V1 or V2 are loads. During isel, the second
6572 // operand of these instructions is only memory, so check if there's a
6573 // potencial load folding here, otherwise use SHUFPS or MOVSD to match the
6575 bool CanFoldLoad = false;
6577 // Trivial case, when V2 comes from a load.
6578 if (MayFoldVectorLoad(V2))
6581 // When V1 is a load, it can be folded later into a store in isel, example:
6582 // (store (v4f32 (X86Movlps (load addr:$src1), VR128:$src2)), addr:$src1)
6584 // (MOVLPSmr addr:$src1, VR128:$src2)
6585 // So, recognize this potential and also use MOVLPS or MOVLPD
6586 else if (MayFoldVectorLoad(V1) && MayFoldIntoStore(Op))
6589 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
6591 if (HasSSE2 && NumElems == 2)
6592 return getTargetShuffleNode(X86ISD::MOVLPD, dl, VT, V1, V2, DAG);
6595 // If we don't care about the second element, proceed to use movss.
6596 if (SVOp->getMaskElt(1) != -1)
6597 return getTargetShuffleNode(X86ISD::MOVLPS, dl, VT, V1, V2, DAG);
6600 // movl and movlp will both match v2i64, but v2i64 is never matched by
6601 // movl earlier because we make it strict to avoid messing with the movlp load
6602 // folding logic (see the code above getMOVLP call). Match it here then,
6603 // this is horrible, but will stay like this until we move all shuffle
6604 // matching to x86 specific nodes. Note that for the 1st condition all
6605 // types are matched with movsd.
6607 // FIXME: isMOVLMask should be checked and matched before getMOVLP,
6608 // as to remove this logic from here, as much as possible
6609 if (NumElems == 2 || !isMOVLMask(SVOp->getMask(), VT))
6610 return getTargetShuffleNode(X86ISD::MOVSD, dl, VT, V1, V2, DAG);
6611 return getTargetShuffleNode(X86ISD::MOVSS, dl, VT, V1, V2, DAG);
6614 assert(VT != MVT::v4i32 && "unsupported shuffle type");
6616 // Invert the operand order and use SHUFPS to match it.
6617 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V2, V1,
6618 getShuffleSHUFImmediate(SVOp), DAG);
6621 // Reduce a vector shuffle to zext.
6623 X86TargetLowering::LowerVectorIntExtend(SDValue Op, SelectionDAG &DAG) const {
6624 // PMOVZX is only available from SSE41.
6625 if (!Subtarget->hasSSE41())
6628 EVT VT = Op.getValueType();
6630 // Only AVX2 support 256-bit vector integer extending.
6631 if (!Subtarget->hasInt256() && VT.is256BitVector())
6634 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
6635 DebugLoc DL = Op.getDebugLoc();
6636 SDValue V1 = Op.getOperand(0);
6637 SDValue V2 = Op.getOperand(1);
6638 unsigned NumElems = VT.getVectorNumElements();
6640 // Extending is an unary operation and the element type of the source vector
6641 // won't be equal to or larger than i64.
6642 if (V2.getOpcode() != ISD::UNDEF || !VT.isInteger() ||
6643 VT.getVectorElementType() == MVT::i64)
6646 // Find the expansion ratio, e.g. expanding from i8 to i32 has a ratio of 4.
6647 unsigned Shift = 1; // Start from 2, i.e. 1 << 1.
6648 while ((1U << Shift) < NumElems) {
6649 if (SVOp->getMaskElt(1U << Shift) == 1)
6652 // The maximal ratio is 8, i.e. from i8 to i64.
6657 // Check the shuffle mask.
6658 unsigned Mask = (1U << Shift) - 1;
6659 for (unsigned i = 0; i != NumElems; ++i) {
6660 int EltIdx = SVOp->getMaskElt(i);
6661 if ((i & Mask) != 0 && EltIdx != -1)
6663 if ((i & Mask) == 0 && (unsigned)EltIdx != (i >> Shift))
6667 LLVMContext *Context = DAG.getContext();
6668 unsigned NBits = VT.getVectorElementType().getSizeInBits() << Shift;
6669 EVT NeVT = EVT::getIntegerVT(*Context, NBits);
6670 EVT NVT = EVT::getVectorVT(*Context, NeVT, NumElems >> Shift);
6672 if (!isTypeLegal(NVT))
6675 // Simplify the operand as it's prepared to be fed into shuffle.
6676 unsigned SignificantBits = NVT.getSizeInBits() >> Shift;
6677 if (V1.getOpcode() == ISD::BITCAST &&
6678 V1.getOperand(0).getOpcode() == ISD::SCALAR_TO_VECTOR &&
6679 V1.getOperand(0).getOperand(0).getOpcode() == ISD::EXTRACT_VECTOR_ELT &&
6681 .getOperand(0).getValueType().getSizeInBits() == SignificantBits) {
6682 // (bitcast (sclr2vec (ext_vec_elt x))) -> (bitcast x)
6683 SDValue V = V1.getOperand(0).getOperand(0).getOperand(0);
6684 ConstantSDNode *CIdx =
6685 dyn_cast<ConstantSDNode>(V1.getOperand(0).getOperand(0).getOperand(1));
6686 // If it's foldable, i.e. normal load with single use, we will let code
6687 // selection to fold it. Otherwise, we will short the conversion sequence.
6688 if (CIdx && CIdx->getZExtValue() == 0 &&
6689 (!ISD::isNormalLoad(V.getNode()) || !V.hasOneUse())) {
6690 if (V.getValueSizeInBits() > V1.getValueSizeInBits()) {
6691 // The "ext_vec_elt" node is wider than the result node.
6692 // In this case we should extract subvector from V.
6693 // (bitcast (sclr2vec (ext_vec_elt x))) -> (bitcast (extract_subvector x)).
6694 unsigned Ratio = V.getValueSizeInBits() / V1.getValueSizeInBits();
6695 EVT FullVT = V.getValueType();
6696 EVT SubVecVT = EVT::getVectorVT(*Context,
6697 FullVT.getVectorElementType(),
6698 FullVT.getVectorNumElements()/Ratio);
6699 V = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, SubVecVT, V,
6700 DAG.getIntPtrConstant(0));
6702 V1 = DAG.getNode(ISD::BITCAST, DL, V1.getValueType(), V);
6706 return DAG.getNode(ISD::BITCAST, DL, VT,
6707 DAG.getNode(X86ISD::VZEXT, DL, NVT, V1));
6711 X86TargetLowering::NormalizeVectorShuffle(SDValue Op, SelectionDAG &DAG) const {
6712 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
6713 MVT VT = Op.getValueType().getSimpleVT();
6714 DebugLoc dl = Op.getDebugLoc();
6715 SDValue V1 = Op.getOperand(0);
6716 SDValue V2 = Op.getOperand(1);
6718 if (isZeroShuffle(SVOp))
6719 return getZeroVector(VT, Subtarget, DAG, dl);
6721 // Handle splat operations
6722 if (SVOp->isSplat()) {
6723 // Use vbroadcast whenever the splat comes from a foldable load
6724 SDValue Broadcast = LowerVectorBroadcast(Op, DAG);
6725 if (Broadcast.getNode())
6729 // Check integer expanding shuffles.
6730 SDValue NewOp = LowerVectorIntExtend(Op, DAG);
6731 if (NewOp.getNode())
6734 // If the shuffle can be profitably rewritten as a narrower shuffle, then
6736 if (VT == MVT::v8i16 || VT == MVT::v16i8 ||
6737 VT == MVT::v16i16 || VT == MVT::v32i8) {
6738 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG);
6739 if (NewOp.getNode())
6740 return DAG.getNode(ISD::BITCAST, dl, VT, NewOp);
6741 } else if ((VT == MVT::v4i32 ||
6742 (VT == MVT::v4f32 && Subtarget->hasSSE2()))) {
6743 // FIXME: Figure out a cleaner way to do this.
6744 // Try to make use of movq to zero out the top part.
6745 if (ISD::isBuildVectorAllZeros(V2.getNode())) {
6746 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG);
6747 if (NewOp.getNode()) {
6748 MVT NewVT = NewOp.getValueType().getSimpleVT();
6749 if (isCommutedMOVLMask(cast<ShuffleVectorSDNode>(NewOp)->getMask(),
6750 NewVT, true, false))
6751 return getVZextMovL(VT, NewVT, NewOp.getOperand(0),
6752 DAG, Subtarget, dl);
6754 } else if (ISD::isBuildVectorAllZeros(V1.getNode())) {
6755 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG);
6756 if (NewOp.getNode()) {
6757 MVT NewVT = NewOp.getValueType().getSimpleVT();
6758 if (isMOVLMask(cast<ShuffleVectorSDNode>(NewOp)->getMask(), NewVT))
6759 return getVZextMovL(VT, NewVT, NewOp.getOperand(1),
6760 DAG, Subtarget, dl);
6768 X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const {
6769 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
6770 SDValue V1 = Op.getOperand(0);
6771 SDValue V2 = Op.getOperand(1);
6772 MVT VT = Op.getValueType().getSimpleVT();
6773 DebugLoc dl = Op.getDebugLoc();
6774 unsigned NumElems = VT.getVectorNumElements();
6775 bool V1IsUndef = V1.getOpcode() == ISD::UNDEF;
6776 bool V2IsUndef = V2.getOpcode() == ISD::UNDEF;
6777 bool V1IsSplat = false;
6778 bool V2IsSplat = false;
6779 bool HasSSE2 = Subtarget->hasSSE2();
6780 bool HasFp256 = Subtarget->hasFp256();
6781 bool HasInt256 = Subtarget->hasInt256();
6782 MachineFunction &MF = DAG.getMachineFunction();
6783 bool OptForSize = MF.getFunction()->getAttributes().
6784 hasAttribute(AttributeSet::FunctionIndex, Attribute::OptimizeForSize);
6786 assert(VT.getSizeInBits() != 64 && "Can't lower MMX shuffles");
6788 if (V1IsUndef && V2IsUndef)
6789 return DAG.getUNDEF(VT);
6791 assert(!V1IsUndef && "Op 1 of shuffle should not be undef");
6793 // Vector shuffle lowering takes 3 steps:
6795 // 1) Normalize the input vectors. Here splats, zeroed vectors, profitable
6796 // narrowing and commutation of operands should be handled.
6797 // 2) Matching of shuffles with known shuffle masks to x86 target specific
6799 // 3) Rewriting of unmatched masks into new generic shuffle operations,
6800 // so the shuffle can be broken into other shuffles and the legalizer can
6801 // try the lowering again.
6803 // The general idea is that no vector_shuffle operation should be left to
6804 // be matched during isel, all of them must be converted to a target specific
6807 // Normalize the input vectors. Here splats, zeroed vectors, profitable
6808 // narrowing and commutation of operands should be handled. The actual code
6809 // doesn't include all of those, work in progress...
6810 SDValue NewOp = NormalizeVectorShuffle(Op, DAG);
6811 if (NewOp.getNode())
6814 SmallVector<int, 8> M(SVOp->getMask().begin(), SVOp->getMask().end());
6816 // NOTE: isPSHUFDMask can also match both masks below (unpckl_undef and
6817 // unpckh_undef). Only use pshufd if speed is more important than size.
6818 if (OptForSize && isUNPCKL_v_undef_Mask(M, VT, HasInt256))
6819 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V1, DAG);
6820 if (OptForSize && isUNPCKH_v_undef_Mask(M, VT, HasInt256))
6821 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V1, DAG);
6823 if (isMOVDDUPMask(M, VT) && Subtarget->hasSSE3() &&
6824 V2IsUndef && MayFoldVectorLoad(V1))
6825 return getMOVDDup(Op, dl, V1, DAG);
6827 if (isMOVHLPS_v_undef_Mask(M, VT))
6828 return getMOVHighToLow(Op, dl, DAG);
6830 // Use to match splats
6831 if (HasSSE2 && isUNPCKHMask(M, VT, HasInt256) && V2IsUndef &&
6832 (VT == MVT::v2f64 || VT == MVT::v2i64))
6833 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V1, DAG);
6835 if (isPSHUFDMask(M, VT)) {
6836 // The actual implementation will match the mask in the if above and then
6837 // during isel it can match several different instructions, not only pshufd
6838 // as its name says, sad but true, emulate the behavior for now...
6839 if (isMOVDDUPMask(M, VT) && ((VT == MVT::v4f32 || VT == MVT::v2i64)))
6840 return getTargetShuffleNode(X86ISD::MOVLHPS, dl, VT, V1, V1, DAG);
6842 unsigned TargetMask = getShuffleSHUFImmediate(SVOp);
6844 if (HasSSE2 && (VT == MVT::v4f32 || VT == MVT::v4i32))
6845 return getTargetShuffleNode(X86ISD::PSHUFD, dl, VT, V1, TargetMask, DAG);
6847 if (HasFp256 && (VT == MVT::v4f32 || VT == MVT::v2f64))
6848 return getTargetShuffleNode(X86ISD::VPERMILP, dl, VT, V1, TargetMask,
6851 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V1, V1,
6855 // Check if this can be converted into a logical shift.
6856 bool isLeft = false;
6859 bool isShift = HasSSE2 && isVectorShift(SVOp, DAG, isLeft, ShVal, ShAmt);
6860 if (isShift && ShVal.hasOneUse()) {
6861 // If the shifted value has multiple uses, it may be cheaper to use
6862 // v_set0 + movlhps or movhlps, etc.
6863 MVT EltVT = VT.getVectorElementType();
6864 ShAmt *= EltVT.getSizeInBits();
6865 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
6868 if (isMOVLMask(M, VT)) {
6869 if (ISD::isBuildVectorAllZeros(V1.getNode()))
6870 return getVZextMovL(VT, VT, V2, DAG, Subtarget, dl);
6871 if (!isMOVLPMask(M, VT)) {
6872 if (HasSSE2 && (VT == MVT::v2i64 || VT == MVT::v2f64))
6873 return getTargetShuffleNode(X86ISD::MOVSD, dl, VT, V1, V2, DAG);
6875 if (VT == MVT::v4i32 || VT == MVT::v4f32)
6876 return getTargetShuffleNode(X86ISD::MOVSS, dl, VT, V1, V2, DAG);
6880 // FIXME: fold these into legal mask.
6881 if (isMOVLHPSMask(M, VT) && !isUNPCKLMask(M, VT, HasInt256))
6882 return getMOVLowToHigh(Op, dl, DAG, HasSSE2);
6884 if (isMOVHLPSMask(M, VT))
6885 return getMOVHighToLow(Op, dl, DAG);
6887 if (V2IsUndef && isMOVSHDUPMask(M, VT, Subtarget))
6888 return getTargetShuffleNode(X86ISD::MOVSHDUP, dl, VT, V1, DAG);
6890 if (V2IsUndef && isMOVSLDUPMask(M, VT, Subtarget))
6891 return getTargetShuffleNode(X86ISD::MOVSLDUP, dl, VT, V1, DAG);
6893 if (isMOVLPMask(M, VT))
6894 return getMOVLP(Op, dl, DAG, HasSSE2);
6896 if (ShouldXformToMOVHLPS(M, VT) ||
6897 ShouldXformToMOVLP(V1.getNode(), V2.getNode(), M, VT))
6898 return CommuteVectorShuffle(SVOp, DAG);
6901 // No better options. Use a vshldq / vsrldq.
6902 MVT EltVT = VT.getVectorElementType();
6903 ShAmt *= EltVT.getSizeInBits();
6904 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
6907 bool Commuted = false;
6908 // FIXME: This should also accept a bitcast of a splat? Be careful, not
6909 // 1,1,1,1 -> v8i16 though.
6910 V1IsSplat = isSplatVector(V1.getNode());
6911 V2IsSplat = isSplatVector(V2.getNode());
6913 // Canonicalize the splat or undef, if present, to be on the RHS.
6914 if (!V2IsUndef && V1IsSplat && !V2IsSplat) {
6915 CommuteVectorShuffleMask(M, NumElems);
6917 std::swap(V1IsSplat, V2IsSplat);
6921 if (isCommutedMOVLMask(M, VT, V2IsSplat, V2IsUndef)) {
6922 // Shuffling low element of v1 into undef, just return v1.
6925 // If V2 is a splat, the mask may be malformed such as <4,3,3,3>, which
6926 // the instruction selector will not match, so get a canonical MOVL with
6927 // swapped operands to undo the commute.
6928 return getMOVL(DAG, dl, VT, V2, V1);
6931 if (isUNPCKLMask(M, VT, HasInt256))
6932 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V2, DAG);
6934 if (isUNPCKHMask(M, VT, HasInt256))
6935 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V2, DAG);
6938 // Normalize mask so all entries that point to V2 points to its first
6939 // element then try to match unpck{h|l} again. If match, return a
6940 // new vector_shuffle with the corrected mask.p
6941 SmallVector<int, 8> NewMask(M.begin(), M.end());
6942 NormalizeMask(NewMask, NumElems);
6943 if (isUNPCKLMask(NewMask, VT, HasInt256, true))
6944 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V2, DAG);
6945 if (isUNPCKHMask(NewMask, VT, HasInt256, true))
6946 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V2, DAG);
6950 // Commute is back and try unpck* again.
6951 // FIXME: this seems wrong.
6952 CommuteVectorShuffleMask(M, NumElems);
6954 std::swap(V1IsSplat, V2IsSplat);
6957 if (isUNPCKLMask(M, VT, HasInt256))
6958 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V2, DAG);
6960 if (isUNPCKHMask(M, VT, HasInt256))
6961 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V2, DAG);
6964 // Normalize the node to match x86 shuffle ops if needed
6965 if (!V2IsUndef && (isSHUFPMask(M, VT, HasFp256, /* Commuted */ true)))
6966 return CommuteVectorShuffle(SVOp, DAG);
6968 // The checks below are all present in isShuffleMaskLegal, but they are
6969 // inlined here right now to enable us to directly emit target specific
6970 // nodes, and remove one by one until they don't return Op anymore.
6972 if (isPALIGNRMask(M, VT, Subtarget))
6973 return getTargetShuffleNode(X86ISD::PALIGNR, dl, VT, V1, V2,
6974 getShufflePALIGNRImmediate(SVOp),
6977 if (ShuffleVectorSDNode::isSplatMask(&M[0], VT) &&
6978 SVOp->getSplatIndex() == 0 && V2IsUndef) {
6979 if (VT == MVT::v2f64 || VT == MVT::v2i64)
6980 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V1, DAG);
6983 if (isPSHUFHWMask(M, VT, HasInt256))
6984 return getTargetShuffleNode(X86ISD::PSHUFHW, dl, VT, V1,
6985 getShufflePSHUFHWImmediate(SVOp),
6988 if (isPSHUFLWMask(M, VT, HasInt256))
6989 return getTargetShuffleNode(X86ISD::PSHUFLW, dl, VT, V1,
6990 getShufflePSHUFLWImmediate(SVOp),
6993 if (isSHUFPMask(M, VT, HasFp256))
6994 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V1, V2,
6995 getShuffleSHUFImmediate(SVOp), DAG);
6997 if (isUNPCKL_v_undef_Mask(M, VT, HasInt256))
6998 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V1, DAG);
6999 if (isUNPCKH_v_undef_Mask(M, VT, HasInt256))
7000 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V1, DAG);
7002 //===--------------------------------------------------------------------===//
7003 // Generate target specific nodes for 128 or 256-bit shuffles only
7004 // supported in the AVX instruction set.
7007 // Handle VMOVDDUPY permutations
7008 if (V2IsUndef && isMOVDDUPYMask(M, VT, HasFp256))
7009 return getTargetShuffleNode(X86ISD::MOVDDUP, dl, VT, V1, DAG);
7011 // Handle VPERMILPS/D* permutations
7012 if (isVPERMILPMask(M, VT, HasFp256)) {
7013 if (HasInt256 && VT == MVT::v8i32)
7014 return getTargetShuffleNode(X86ISD::PSHUFD, dl, VT, V1,
7015 getShuffleSHUFImmediate(SVOp), DAG);
7016 return getTargetShuffleNode(X86ISD::VPERMILP, dl, VT, V1,
7017 getShuffleSHUFImmediate(SVOp), DAG);
7020 // Handle VPERM2F128/VPERM2I128 permutations
7021 if (isVPERM2X128Mask(M, VT, HasFp256))
7022 return getTargetShuffleNode(X86ISD::VPERM2X128, dl, VT, V1,
7023 V2, getShuffleVPERM2X128Immediate(SVOp), DAG);
7025 SDValue BlendOp = LowerVECTOR_SHUFFLEtoBlend(SVOp, Subtarget, DAG);
7026 if (BlendOp.getNode())
7029 if (V2IsUndef && HasInt256 && (VT == MVT::v8i32 || VT == MVT::v8f32)) {
7030 SmallVector<SDValue, 8> permclMask;
7031 for (unsigned i = 0; i != 8; ++i) {
7032 permclMask.push_back(DAG.getConstant((M[i]>=0) ? M[i] : 0, MVT::i32));
7034 SDValue Mask = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8i32,
7036 // Bitcast is for VPERMPS since mask is v8i32 but node takes v8f32
7037 return DAG.getNode(X86ISD::VPERMV, dl, VT,
7038 DAG.getNode(ISD::BITCAST, dl, VT, Mask), V1);
7041 if (V2IsUndef && HasInt256 && (VT == MVT::v4i64 || VT == MVT::v4f64))
7042 return getTargetShuffleNode(X86ISD::VPERMI, dl, VT, V1,
7043 getShuffleCLImmediate(SVOp), DAG);
7045 //===--------------------------------------------------------------------===//
7046 // Since no target specific shuffle was selected for this generic one,
7047 // lower it into other known shuffles. FIXME: this isn't true yet, but
7048 // this is the plan.
7051 // Handle v8i16 specifically since SSE can do byte extraction and insertion.
7052 if (VT == MVT::v8i16) {
7053 SDValue NewOp = LowerVECTOR_SHUFFLEv8i16(Op, Subtarget, DAG);
7054 if (NewOp.getNode())
7058 if (VT == MVT::v16i8) {
7059 SDValue NewOp = LowerVECTOR_SHUFFLEv16i8(SVOp, DAG, *this);
7060 if (NewOp.getNode())
7064 if (VT == MVT::v32i8) {
7065 SDValue NewOp = LowerVECTOR_SHUFFLEv32i8(SVOp, Subtarget, DAG);
7066 if (NewOp.getNode())
7070 // Handle all 128-bit wide vectors with 4 elements, and match them with
7071 // several different shuffle types.
7072 if (NumElems == 4 && VT.is128BitVector())
7073 return LowerVECTOR_SHUFFLE_128v4(SVOp, DAG);
7075 // Handle general 256-bit shuffles
7076 if (VT.is256BitVector())
7077 return LowerVECTOR_SHUFFLE_256(SVOp, DAG);
7082 static SDValue LowerEXTRACT_VECTOR_ELT_SSE4(SDValue Op, SelectionDAG &DAG) {
7083 MVT VT = Op.getValueType().getSimpleVT();
7084 DebugLoc dl = Op.getDebugLoc();
7086 if (!Op.getOperand(0).getValueType().getSimpleVT().is128BitVector())
7089 if (VT.getSizeInBits() == 8) {
7090 SDValue Extract = DAG.getNode(X86ISD::PEXTRB, dl, MVT::i32,
7091 Op.getOperand(0), Op.getOperand(1));
7092 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
7093 DAG.getValueType(VT));
7094 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
7097 if (VT.getSizeInBits() == 16) {
7098 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
7099 // If Idx is 0, it's cheaper to do a move instead of a pextrw.
7101 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
7102 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
7103 DAG.getNode(ISD::BITCAST, dl,
7107 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, MVT::i32,
7108 Op.getOperand(0), Op.getOperand(1));
7109 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
7110 DAG.getValueType(VT));
7111 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
7114 if (VT == MVT::f32) {
7115 // EXTRACTPS outputs to a GPR32 register which will require a movd to copy
7116 // the result back to FR32 register. It's only worth matching if the
7117 // result has a single use which is a store or a bitcast to i32. And in
7118 // the case of a store, it's not worth it if the index is a constant 0,
7119 // because a MOVSSmr can be used instead, which is smaller and faster.
7120 if (!Op.hasOneUse())
7122 SDNode *User = *Op.getNode()->use_begin();
7123 if ((User->getOpcode() != ISD::STORE ||
7124 (isa<ConstantSDNode>(Op.getOperand(1)) &&
7125 cast<ConstantSDNode>(Op.getOperand(1))->isNullValue())) &&
7126 (User->getOpcode() != ISD::BITCAST ||
7127 User->getValueType(0) != MVT::i32))
7129 SDValue Extract = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
7130 DAG.getNode(ISD::BITCAST, dl, MVT::v4i32,
7133 return DAG.getNode(ISD::BITCAST, dl, MVT::f32, Extract);
7136 if (VT == MVT::i32 || VT == MVT::i64) {
7137 // ExtractPS/pextrq works with constant index.
7138 if (isa<ConstantSDNode>(Op.getOperand(1)))
7145 X86TargetLowering::LowerEXTRACT_VECTOR_ELT(SDValue Op,
7146 SelectionDAG &DAG) const {
7147 if (!isa<ConstantSDNode>(Op.getOperand(1)))
7150 SDValue Vec = Op.getOperand(0);
7151 MVT VecVT = Vec.getValueType().getSimpleVT();
7153 // If this is a 256-bit vector result, first extract the 128-bit vector and
7154 // then extract the element from the 128-bit vector.
7155 if (VecVT.is256BitVector()) {
7156 DebugLoc dl = Op.getNode()->getDebugLoc();
7157 unsigned NumElems = VecVT.getVectorNumElements();
7158 SDValue Idx = Op.getOperand(1);
7159 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
7161 // Get the 128-bit vector.
7162 Vec = Extract128BitVector(Vec, IdxVal, DAG, dl);
7164 if (IdxVal >= NumElems/2)
7165 IdxVal -= NumElems/2;
7166 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, Op.getValueType(), Vec,
7167 DAG.getConstant(IdxVal, MVT::i32));
7170 assert(VecVT.is128BitVector() && "Unexpected vector length");
7172 if (Subtarget->hasSSE41()) {
7173 SDValue Res = LowerEXTRACT_VECTOR_ELT_SSE4(Op, DAG);
7178 MVT VT = Op.getValueType().getSimpleVT();
7179 DebugLoc dl = Op.getDebugLoc();
7180 // TODO: handle v16i8.
7181 if (VT.getSizeInBits() == 16) {
7182 SDValue Vec = Op.getOperand(0);
7183 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
7185 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
7186 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
7187 DAG.getNode(ISD::BITCAST, dl,
7190 // Transform it so it match pextrw which produces a 32-bit result.
7191 MVT EltVT = MVT::i32;
7192 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, EltVT,
7193 Op.getOperand(0), Op.getOperand(1));
7194 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, EltVT, Extract,
7195 DAG.getValueType(VT));
7196 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
7199 if (VT.getSizeInBits() == 32) {
7200 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
7204 // SHUFPS the element to the lowest double word, then movss.
7205 int Mask[4] = { static_cast<int>(Idx), -1, -1, -1 };
7206 MVT VVT = Op.getOperand(0).getValueType().getSimpleVT();
7207 SDValue Vec = DAG.getVectorShuffle(VVT, dl, Op.getOperand(0),
7208 DAG.getUNDEF(VVT), Mask);
7209 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
7210 DAG.getIntPtrConstant(0));
7213 if (VT.getSizeInBits() == 64) {
7214 // FIXME: .td only matches this for <2 x f64>, not <2 x i64> on 32b
7215 // FIXME: seems like this should be unnecessary if mov{h,l}pd were taught
7216 // to match extract_elt for f64.
7217 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
7221 // UNPCKHPD the element to the lowest double word, then movsd.
7222 // Note if the lower 64 bits of the result of the UNPCKHPD is then stored
7223 // to a f64mem, the whole operation is folded into a single MOVHPDmr.
7224 int Mask[2] = { 1, -1 };
7225 MVT VVT = Op.getOperand(0).getValueType().getSimpleVT();
7226 SDValue Vec = DAG.getVectorShuffle(VVT, dl, Op.getOperand(0),
7227 DAG.getUNDEF(VVT), Mask);
7228 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
7229 DAG.getIntPtrConstant(0));
7235 static SDValue LowerINSERT_VECTOR_ELT_SSE4(SDValue Op, SelectionDAG &DAG) {
7236 MVT VT = Op.getValueType().getSimpleVT();
7237 MVT EltVT = VT.getVectorElementType();
7238 DebugLoc dl = Op.getDebugLoc();
7240 SDValue N0 = Op.getOperand(0);
7241 SDValue N1 = Op.getOperand(1);
7242 SDValue N2 = Op.getOperand(2);
7244 if (!VT.is128BitVector())
7247 if ((EltVT.getSizeInBits() == 8 || EltVT.getSizeInBits() == 16) &&
7248 isa<ConstantSDNode>(N2)) {
7250 if (VT == MVT::v8i16)
7251 Opc = X86ISD::PINSRW;
7252 else if (VT == MVT::v16i8)
7253 Opc = X86ISD::PINSRB;
7255 Opc = X86ISD::PINSRB;
7257 // Transform it so it match pinsr{b,w} which expects a GR32 as its second
7259 if (N1.getValueType() != MVT::i32)
7260 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
7261 if (N2.getValueType() != MVT::i32)
7262 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
7263 return DAG.getNode(Opc, dl, VT, N0, N1, N2);
7266 if (EltVT == MVT::f32 && isa<ConstantSDNode>(N2)) {
7267 // Bits [7:6] of the constant are the source select. This will always be
7268 // zero here. The DAG Combiner may combine an extract_elt index into these
7269 // bits. For example (insert (extract, 3), 2) could be matched by putting
7270 // the '3' into bits [7:6] of X86ISD::INSERTPS.
7271 // Bits [5:4] of the constant are the destination select. This is the
7272 // value of the incoming immediate.
7273 // Bits [3:0] of the constant are the zero mask. The DAG Combiner may
7274 // combine either bitwise AND or insert of float 0.0 to set these bits.
7275 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue() << 4);
7276 // Create this as a scalar to vector..
7277 N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4f32, N1);
7278 return DAG.getNode(X86ISD::INSERTPS, dl, VT, N0, N1, N2);
7281 if ((EltVT == MVT::i32 || EltVT == MVT::i64) && isa<ConstantSDNode>(N2)) {
7282 // PINSR* works with constant index.
7289 X86TargetLowering::LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const {
7290 MVT VT = Op.getValueType().getSimpleVT();
7291 MVT EltVT = VT.getVectorElementType();
7293 DebugLoc dl = Op.getDebugLoc();
7294 SDValue N0 = Op.getOperand(0);
7295 SDValue N1 = Op.getOperand(1);
7296 SDValue N2 = Op.getOperand(2);
7298 // If this is a 256-bit vector result, first extract the 128-bit vector,
7299 // insert the element into the extracted half and then place it back.
7300 if (VT.is256BitVector()) {
7301 if (!isa<ConstantSDNode>(N2))
7304 // Get the desired 128-bit vector half.
7305 unsigned NumElems = VT.getVectorNumElements();
7306 unsigned IdxVal = cast<ConstantSDNode>(N2)->getZExtValue();
7307 SDValue V = Extract128BitVector(N0, IdxVal, DAG, dl);
7309 // Insert the element into the desired half.
7310 bool Upper = IdxVal >= NumElems/2;
7311 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, V.getValueType(), V, N1,
7312 DAG.getConstant(Upper ? IdxVal-NumElems/2 : IdxVal, MVT::i32));
7314 // Insert the changed part back to the 256-bit vector
7315 return Insert128BitVector(N0, V, IdxVal, DAG, dl);
7318 if (Subtarget->hasSSE41())
7319 return LowerINSERT_VECTOR_ELT_SSE4(Op, DAG);
7321 if (EltVT == MVT::i8)
7324 if (EltVT.getSizeInBits() == 16 && isa<ConstantSDNode>(N2)) {
7325 // Transform it so it match pinsrw which expects a 16-bit value in a GR32
7326 // as its second argument.
7327 if (N1.getValueType() != MVT::i32)
7328 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
7329 if (N2.getValueType() != MVT::i32)
7330 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
7331 return DAG.getNode(X86ISD::PINSRW, dl, VT, N0, N1, N2);
7336 static SDValue LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) {
7337 LLVMContext *Context = DAG.getContext();
7338 DebugLoc dl = Op.getDebugLoc();
7339 MVT OpVT = Op.getValueType().getSimpleVT();
7341 // If this is a 256-bit vector result, first insert into a 128-bit
7342 // vector and then insert into the 256-bit vector.
7343 if (!OpVT.is128BitVector()) {
7344 // Insert into a 128-bit vector.
7345 EVT VT128 = EVT::getVectorVT(*Context,
7346 OpVT.getVectorElementType(),
7347 OpVT.getVectorNumElements() / 2);
7349 Op = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT128, Op.getOperand(0));
7351 // Insert the 128-bit vector.
7352 return Insert128BitVector(DAG.getUNDEF(OpVT), Op, 0, DAG, dl);
7355 if (OpVT == MVT::v1i64 &&
7356 Op.getOperand(0).getValueType() == MVT::i64)
7357 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v1i64, Op.getOperand(0));
7359 SDValue AnyExt = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, Op.getOperand(0));
7360 assert(OpVT.is128BitVector() && "Expected an SSE type!");
7361 return DAG.getNode(ISD::BITCAST, dl, OpVT,
7362 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,AnyExt));
7365 // Lower a node with an EXTRACT_SUBVECTOR opcode. This may result in
7366 // a simple subregister reference or explicit instructions to grab
7367 // upper bits of a vector.
7368 static SDValue LowerEXTRACT_SUBVECTOR(SDValue Op, const X86Subtarget *Subtarget,
7369 SelectionDAG &DAG) {
7370 if (Subtarget->hasFp256()) {
7371 DebugLoc dl = Op.getNode()->getDebugLoc();
7372 SDValue Vec = Op.getNode()->getOperand(0);
7373 SDValue Idx = Op.getNode()->getOperand(1);
7375 if (Op.getNode()->getValueType(0).is128BitVector() &&
7376 Vec.getNode()->getValueType(0).is256BitVector() &&
7377 isa<ConstantSDNode>(Idx)) {
7378 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
7379 return Extract128BitVector(Vec, IdxVal, DAG, dl);
7385 // Lower a node with an INSERT_SUBVECTOR opcode. This may result in a
7386 // simple superregister reference or explicit instructions to insert
7387 // the upper bits of a vector.
7388 static SDValue LowerINSERT_SUBVECTOR(SDValue Op, const X86Subtarget *Subtarget,
7389 SelectionDAG &DAG) {
7390 if (Subtarget->hasFp256()) {
7391 DebugLoc dl = Op.getNode()->getDebugLoc();
7392 SDValue Vec = Op.getNode()->getOperand(0);
7393 SDValue SubVec = Op.getNode()->getOperand(1);
7394 SDValue Idx = Op.getNode()->getOperand(2);
7396 if (Op.getNode()->getValueType(0).is256BitVector() &&
7397 SubVec.getNode()->getValueType(0).is128BitVector() &&
7398 isa<ConstantSDNode>(Idx)) {
7399 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
7400 return Insert128BitVector(Vec, SubVec, IdxVal, DAG, dl);
7406 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
7407 // their target countpart wrapped in the X86ISD::Wrapper node. Suppose N is
7408 // one of the above mentioned nodes. It has to be wrapped because otherwise
7409 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
7410 // be used to form addressing mode. These wrapped nodes will be selected
7413 X86TargetLowering::LowerConstantPool(SDValue Op, SelectionDAG &DAG) const {
7414 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
7416 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7418 unsigned char OpFlag = 0;
7419 unsigned WrapperKind = X86ISD::Wrapper;
7420 CodeModel::Model M = getTargetMachine().getCodeModel();
7422 if (Subtarget->isPICStyleRIPRel() &&
7423 (M == CodeModel::Small || M == CodeModel::Kernel))
7424 WrapperKind = X86ISD::WrapperRIP;
7425 else if (Subtarget->isPICStyleGOT())
7426 OpFlag = X86II::MO_GOTOFF;
7427 else if (Subtarget->isPICStyleStubPIC())
7428 OpFlag = X86II::MO_PIC_BASE_OFFSET;
7430 SDValue Result = DAG.getTargetConstantPool(CP->getConstVal(), getPointerTy(),
7432 CP->getOffset(), OpFlag);
7433 DebugLoc DL = CP->getDebugLoc();
7434 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7435 // With PIC, the address is actually $g + Offset.
7437 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7438 DAG.getNode(X86ISD::GlobalBaseReg,
7439 DebugLoc(), getPointerTy()),
7446 SDValue X86TargetLowering::LowerJumpTable(SDValue Op, SelectionDAG &DAG) const {
7447 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
7449 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7451 unsigned char OpFlag = 0;
7452 unsigned WrapperKind = X86ISD::Wrapper;
7453 CodeModel::Model M = getTargetMachine().getCodeModel();
7455 if (Subtarget->isPICStyleRIPRel() &&
7456 (M == CodeModel::Small || M == CodeModel::Kernel))
7457 WrapperKind = X86ISD::WrapperRIP;
7458 else if (Subtarget->isPICStyleGOT())
7459 OpFlag = X86II::MO_GOTOFF;
7460 else if (Subtarget->isPICStyleStubPIC())
7461 OpFlag = X86II::MO_PIC_BASE_OFFSET;
7463 SDValue Result = DAG.getTargetJumpTable(JT->getIndex(), getPointerTy(),
7465 DebugLoc DL = JT->getDebugLoc();
7466 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7468 // With PIC, the address is actually $g + Offset.
7470 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7471 DAG.getNode(X86ISD::GlobalBaseReg,
7472 DebugLoc(), getPointerTy()),
7479 X86TargetLowering::LowerExternalSymbol(SDValue Op, SelectionDAG &DAG) const {
7480 const char *Sym = cast<ExternalSymbolSDNode>(Op)->getSymbol();
7482 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7484 unsigned char OpFlag = 0;
7485 unsigned WrapperKind = X86ISD::Wrapper;
7486 CodeModel::Model M = getTargetMachine().getCodeModel();
7488 if (Subtarget->isPICStyleRIPRel() &&
7489 (M == CodeModel::Small || M == CodeModel::Kernel)) {
7490 if (Subtarget->isTargetDarwin() || Subtarget->isTargetELF())
7491 OpFlag = X86II::MO_GOTPCREL;
7492 WrapperKind = X86ISD::WrapperRIP;
7493 } else if (Subtarget->isPICStyleGOT()) {
7494 OpFlag = X86II::MO_GOT;
7495 } else if (Subtarget->isPICStyleStubPIC()) {
7496 OpFlag = X86II::MO_DARWIN_NONLAZY_PIC_BASE;
7497 } else if (Subtarget->isPICStyleStubNoDynamic()) {
7498 OpFlag = X86II::MO_DARWIN_NONLAZY;
7501 SDValue Result = DAG.getTargetExternalSymbol(Sym, getPointerTy(), OpFlag);
7503 DebugLoc DL = Op.getDebugLoc();
7504 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7506 // With PIC, the address is actually $g + Offset.
7507 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
7508 !Subtarget->is64Bit()) {
7509 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7510 DAG.getNode(X86ISD::GlobalBaseReg,
7511 DebugLoc(), getPointerTy()),
7515 // For symbols that require a load from a stub to get the address, emit the
7517 if (isGlobalStubReference(OpFlag))
7518 Result = DAG.getLoad(getPointerTy(), DL, DAG.getEntryNode(), Result,
7519 MachinePointerInfo::getGOT(), false, false, false, 0);
7525 X86TargetLowering::LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const {
7526 // Create the TargetBlockAddressAddress node.
7527 unsigned char OpFlags =
7528 Subtarget->ClassifyBlockAddressReference();
7529 CodeModel::Model M = getTargetMachine().getCodeModel();
7530 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
7531 int64_t Offset = cast<BlockAddressSDNode>(Op)->getOffset();
7532 DebugLoc dl = Op.getDebugLoc();
7533 SDValue Result = DAG.getTargetBlockAddress(BA, getPointerTy(), Offset,
7536 if (Subtarget->isPICStyleRIPRel() &&
7537 (M == CodeModel::Small || M == CodeModel::Kernel))
7538 Result = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Result);
7540 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
7542 // With PIC, the address is actually $g + Offset.
7543 if (isGlobalRelativeToPICBase(OpFlags)) {
7544 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
7545 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
7553 X86TargetLowering::LowerGlobalAddress(const GlobalValue *GV, DebugLoc dl,
7554 int64_t Offset, SelectionDAG &DAG) const {
7555 // Create the TargetGlobalAddress node, folding in the constant
7556 // offset if it is legal.
7557 unsigned char OpFlags =
7558 Subtarget->ClassifyGlobalReference(GV, getTargetMachine());
7559 CodeModel::Model M = getTargetMachine().getCodeModel();
7561 if (OpFlags == X86II::MO_NO_FLAG &&
7562 X86::isOffsetSuitableForCodeModel(Offset, M)) {
7563 // A direct static reference to a global.
7564 Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), Offset);
7567 Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), 0, OpFlags);
7570 if (Subtarget->isPICStyleRIPRel() &&
7571 (M == CodeModel::Small || M == CodeModel::Kernel))
7572 Result = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Result);
7574 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
7576 // With PIC, the address is actually $g + Offset.
7577 if (isGlobalRelativeToPICBase(OpFlags)) {
7578 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
7579 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
7583 // For globals that require a load from a stub to get the address, emit the
7585 if (isGlobalStubReference(OpFlags))
7586 Result = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(), Result,
7587 MachinePointerInfo::getGOT(), false, false, false, 0);
7589 // If there was a non-zero offset that we didn't fold, create an explicit
7592 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(), Result,
7593 DAG.getConstant(Offset, getPointerTy()));
7599 X86TargetLowering::LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const {
7600 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
7601 int64_t Offset = cast<GlobalAddressSDNode>(Op)->getOffset();
7602 return LowerGlobalAddress(GV, Op.getDebugLoc(), Offset, DAG);
7606 GetTLSADDR(SelectionDAG &DAG, SDValue Chain, GlobalAddressSDNode *GA,
7607 SDValue *InFlag, const EVT PtrVT, unsigned ReturnReg,
7608 unsigned char OperandFlags, bool LocalDynamic = false) {
7609 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
7610 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
7611 DebugLoc dl = GA->getDebugLoc();
7612 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
7613 GA->getValueType(0),
7617 X86ISD::NodeType CallType = LocalDynamic ? X86ISD::TLSBASEADDR
7621 SDValue Ops[] = { Chain, TGA, *InFlag };
7622 Chain = DAG.getNode(CallType, dl, NodeTys, Ops, 3);
7624 SDValue Ops[] = { Chain, TGA };
7625 Chain = DAG.getNode(CallType, dl, NodeTys, Ops, 2);
7628 // TLSADDR will be codegen'ed as call. Inform MFI that function has calls.
7629 MFI->setAdjustsStack(true);
7631 SDValue Flag = Chain.getValue(1);
7632 return DAG.getCopyFromReg(Chain, dl, ReturnReg, PtrVT, Flag);
7635 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 32 bit
7637 LowerToTLSGeneralDynamicModel32(GlobalAddressSDNode *GA, SelectionDAG &DAG,
7640 DebugLoc dl = GA->getDebugLoc(); // ? function entry point might be better
7641 SDValue Chain = DAG.getCopyToReg(DAG.getEntryNode(), dl, X86::EBX,
7642 DAG.getNode(X86ISD::GlobalBaseReg,
7643 DebugLoc(), PtrVT), InFlag);
7644 InFlag = Chain.getValue(1);
7646 return GetTLSADDR(DAG, Chain, GA, &InFlag, PtrVT, X86::EAX, X86II::MO_TLSGD);
7649 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 64 bit
7651 LowerToTLSGeneralDynamicModel64(GlobalAddressSDNode *GA, SelectionDAG &DAG,
7653 return GetTLSADDR(DAG, DAG.getEntryNode(), GA, NULL, PtrVT,
7654 X86::RAX, X86II::MO_TLSGD);
7657 static SDValue LowerToTLSLocalDynamicModel(GlobalAddressSDNode *GA,
7661 DebugLoc dl = GA->getDebugLoc();
7663 // Get the start address of the TLS block for this module.
7664 X86MachineFunctionInfo* MFI = DAG.getMachineFunction()
7665 .getInfo<X86MachineFunctionInfo>();
7666 MFI->incNumLocalDynamicTLSAccesses();
7670 Base = GetTLSADDR(DAG, DAG.getEntryNode(), GA, NULL, PtrVT, X86::RAX,
7671 X86II::MO_TLSLD, /*LocalDynamic=*/true);
7674 SDValue Chain = DAG.getCopyToReg(DAG.getEntryNode(), dl, X86::EBX,
7675 DAG.getNode(X86ISD::GlobalBaseReg, DebugLoc(), PtrVT), InFlag);
7676 InFlag = Chain.getValue(1);
7677 Base = GetTLSADDR(DAG, Chain, GA, &InFlag, PtrVT, X86::EAX,
7678 X86II::MO_TLSLDM, /*LocalDynamic=*/true);
7681 // Note: the CleanupLocalDynamicTLSPass will remove redundant computations
7685 unsigned char OperandFlags = X86II::MO_DTPOFF;
7686 unsigned WrapperKind = X86ISD::Wrapper;
7687 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
7688 GA->getValueType(0),
7689 GA->getOffset(), OperandFlags);
7690 SDValue Offset = DAG.getNode(WrapperKind, dl, PtrVT, TGA);
7692 // Add x@dtpoff with the base.
7693 return DAG.getNode(ISD::ADD, dl, PtrVT, Offset, Base);
7696 // Lower ISD::GlobalTLSAddress using the "initial exec" or "local exec" model.
7697 static SDValue LowerToTLSExecModel(GlobalAddressSDNode *GA, SelectionDAG &DAG,
7698 const EVT PtrVT, TLSModel::Model model,
7699 bool is64Bit, bool isPIC) {
7700 DebugLoc dl = GA->getDebugLoc();
7702 // Get the Thread Pointer, which is %gs:0 (32-bit) or %fs:0 (64-bit).
7703 Value *Ptr = Constant::getNullValue(Type::getInt8PtrTy(*DAG.getContext(),
7704 is64Bit ? 257 : 256));
7706 SDValue ThreadPointer = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
7707 DAG.getIntPtrConstant(0),
7708 MachinePointerInfo(Ptr),
7709 false, false, false, 0);
7711 unsigned char OperandFlags = 0;
7712 // Most TLS accesses are not RIP relative, even on x86-64. One exception is
7714 unsigned WrapperKind = X86ISD::Wrapper;
7715 if (model == TLSModel::LocalExec) {
7716 OperandFlags = is64Bit ? X86II::MO_TPOFF : X86II::MO_NTPOFF;
7717 } else if (model == TLSModel::InitialExec) {
7719 OperandFlags = X86II::MO_GOTTPOFF;
7720 WrapperKind = X86ISD::WrapperRIP;
7722 OperandFlags = isPIC ? X86II::MO_GOTNTPOFF : X86II::MO_INDNTPOFF;
7725 llvm_unreachable("Unexpected model");
7728 // emit "addl x@ntpoff,%eax" (local exec)
7729 // or "addl x@indntpoff,%eax" (initial exec)
7730 // or "addl x@gotntpoff(%ebx) ,%eax" (initial exec, 32-bit pic)
7731 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
7732 GA->getValueType(0),
7733 GA->getOffset(), OperandFlags);
7734 SDValue Offset = DAG.getNode(WrapperKind, dl, PtrVT, TGA);
7736 if (model == TLSModel::InitialExec) {
7737 if (isPIC && !is64Bit) {
7738 Offset = DAG.getNode(ISD::ADD, dl, PtrVT,
7739 DAG.getNode(X86ISD::GlobalBaseReg, DebugLoc(), PtrVT),
7743 Offset = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Offset,
7744 MachinePointerInfo::getGOT(), false, false, false,
7748 // The address of the thread local variable is the add of the thread
7749 // pointer with the offset of the variable.
7750 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
7754 X86TargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const {
7756 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
7757 const GlobalValue *GV = GA->getGlobal();
7759 if (Subtarget->isTargetELF()) {
7760 TLSModel::Model model = getTargetMachine().getTLSModel(GV);
7763 case TLSModel::GeneralDynamic:
7764 if (Subtarget->is64Bit())
7765 return LowerToTLSGeneralDynamicModel64(GA, DAG, getPointerTy());
7766 return LowerToTLSGeneralDynamicModel32(GA, DAG, getPointerTy());
7767 case TLSModel::LocalDynamic:
7768 return LowerToTLSLocalDynamicModel(GA, DAG, getPointerTy(),
7769 Subtarget->is64Bit());
7770 case TLSModel::InitialExec:
7771 case TLSModel::LocalExec:
7772 return LowerToTLSExecModel(GA, DAG, getPointerTy(), model,
7773 Subtarget->is64Bit(),
7774 getTargetMachine().getRelocationModel() == Reloc::PIC_);
7776 llvm_unreachable("Unknown TLS model.");
7779 if (Subtarget->isTargetDarwin()) {
7780 // Darwin only has one model of TLS. Lower to that.
7781 unsigned char OpFlag = 0;
7782 unsigned WrapperKind = Subtarget->isPICStyleRIPRel() ?
7783 X86ISD::WrapperRIP : X86ISD::Wrapper;
7785 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7787 bool PIC32 = (getTargetMachine().getRelocationModel() == Reloc::PIC_) &&
7788 !Subtarget->is64Bit();
7790 OpFlag = X86II::MO_TLVP_PIC_BASE;
7792 OpFlag = X86II::MO_TLVP;
7793 DebugLoc DL = Op.getDebugLoc();
7794 SDValue Result = DAG.getTargetGlobalAddress(GA->getGlobal(), DL,
7795 GA->getValueType(0),
7796 GA->getOffset(), OpFlag);
7797 SDValue Offset = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7799 // With PIC32, the address is actually $g + Offset.
7801 Offset = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7802 DAG.getNode(X86ISD::GlobalBaseReg,
7803 DebugLoc(), getPointerTy()),
7806 // Lowering the machine isd will make sure everything is in the right
7808 SDValue Chain = DAG.getEntryNode();
7809 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
7810 SDValue Args[] = { Chain, Offset };
7811 Chain = DAG.getNode(X86ISD::TLSCALL, DL, NodeTys, Args, 2);
7813 // TLSCALL will be codegen'ed as call. Inform MFI that function has calls.
7814 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
7815 MFI->setAdjustsStack(true);
7817 // And our return value (tls address) is in the standard call return value
7819 unsigned Reg = Subtarget->is64Bit() ? X86::RAX : X86::EAX;
7820 return DAG.getCopyFromReg(Chain, DL, Reg, getPointerTy(),
7824 if (Subtarget->isTargetWindows() || Subtarget->isTargetMingw()) {
7825 // Just use the implicit TLS architecture
7826 // Need to generate someting similar to:
7827 // mov rdx, qword [gs:abs 58H]; Load pointer to ThreadLocalStorage
7829 // mov ecx, dword [rel _tls_index]: Load index (from C runtime)
7830 // mov rcx, qword [rdx+rcx*8]
7831 // mov eax, .tls$:tlsvar
7832 // [rax+rcx] contains the address
7833 // Windows 64bit: gs:0x58
7834 // Windows 32bit: fs:__tls_array
7836 // If GV is an alias then use the aliasee for determining
7837 // thread-localness.
7838 if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV))
7839 GV = GA->resolveAliasedGlobal(false);
7840 DebugLoc dl = GA->getDebugLoc();
7841 SDValue Chain = DAG.getEntryNode();
7843 // Get the Thread Pointer, which is %fs:__tls_array (32-bit) or
7844 // %gs:0x58 (64-bit). On MinGW, __tls_array is not available, so directly
7845 // use its literal value of 0x2C.
7846 Value *Ptr = Constant::getNullValue(Subtarget->is64Bit()
7847 ? Type::getInt8PtrTy(*DAG.getContext(),
7849 : Type::getInt32PtrTy(*DAG.getContext(),
7852 SDValue TlsArray = Subtarget->is64Bit() ? DAG.getIntPtrConstant(0x58) :
7853 (Subtarget->isTargetMingw() ? DAG.getIntPtrConstant(0x2C) :
7854 DAG.getExternalSymbol("_tls_array", getPointerTy()));
7856 SDValue ThreadPointer = DAG.getLoad(getPointerTy(), dl, Chain, TlsArray,
7857 MachinePointerInfo(Ptr),
7858 false, false, false, 0);
7860 // Load the _tls_index variable
7861 SDValue IDX = DAG.getExternalSymbol("_tls_index", getPointerTy());
7862 if (Subtarget->is64Bit())
7863 IDX = DAG.getExtLoad(ISD::ZEXTLOAD, dl, getPointerTy(), Chain,
7864 IDX, MachinePointerInfo(), MVT::i32,
7867 IDX = DAG.getLoad(getPointerTy(), dl, Chain, IDX, MachinePointerInfo(),
7868 false, false, false, 0);
7870 SDValue Scale = DAG.getConstant(Log2_64_Ceil(TD->getPointerSize()),
7872 IDX = DAG.getNode(ISD::SHL, dl, getPointerTy(), IDX, Scale);
7874 SDValue res = DAG.getNode(ISD::ADD, dl, getPointerTy(), ThreadPointer, IDX);
7875 res = DAG.getLoad(getPointerTy(), dl, Chain, res, MachinePointerInfo(),
7876 false, false, false, 0);
7878 // Get the offset of start of .tls section
7879 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
7880 GA->getValueType(0),
7881 GA->getOffset(), X86II::MO_SECREL);
7882 SDValue Offset = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), TGA);
7884 // The address of the thread local variable is the add of the thread
7885 // pointer with the offset of the variable.
7886 return DAG.getNode(ISD::ADD, dl, getPointerTy(), res, Offset);
7889 llvm_unreachable("TLS not implemented for this target.");
7892 /// LowerShiftParts - Lower SRA_PARTS and friends, which return two i32 values
7893 /// and take a 2 x i32 value to shift plus a shift amount.
7894 SDValue X86TargetLowering::LowerShiftParts(SDValue Op, SelectionDAG &DAG) const{
7895 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
7896 EVT VT = Op.getValueType();
7897 unsigned VTBits = VT.getSizeInBits();
7898 DebugLoc dl = Op.getDebugLoc();
7899 bool isSRA = Op.getOpcode() == ISD::SRA_PARTS;
7900 SDValue ShOpLo = Op.getOperand(0);
7901 SDValue ShOpHi = Op.getOperand(1);
7902 SDValue ShAmt = Op.getOperand(2);
7903 SDValue Tmp1 = isSRA ? DAG.getNode(ISD::SRA, dl, VT, ShOpHi,
7904 DAG.getConstant(VTBits - 1, MVT::i8))
7905 : DAG.getConstant(0, VT);
7908 if (Op.getOpcode() == ISD::SHL_PARTS) {
7909 Tmp2 = DAG.getNode(X86ISD::SHLD, dl, VT, ShOpHi, ShOpLo, ShAmt);
7910 Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt);
7912 Tmp2 = DAG.getNode(X86ISD::SHRD, dl, VT, ShOpLo, ShOpHi, ShAmt);
7913 Tmp3 = DAG.getNode(isSRA ? ISD::SRA : ISD::SRL, dl, VT, ShOpHi, ShAmt);
7916 SDValue AndNode = DAG.getNode(ISD::AND, dl, MVT::i8, ShAmt,
7917 DAG.getConstant(VTBits, MVT::i8));
7918 SDValue Cond = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
7919 AndNode, DAG.getConstant(0, MVT::i8));
7922 SDValue CC = DAG.getConstant(X86::COND_NE, MVT::i8);
7923 SDValue Ops0[4] = { Tmp2, Tmp3, CC, Cond };
7924 SDValue Ops1[4] = { Tmp3, Tmp1, CC, Cond };
7926 if (Op.getOpcode() == ISD::SHL_PARTS) {
7927 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0, 4);
7928 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1, 4);
7930 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0, 4);
7931 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1, 4);
7934 SDValue Ops[2] = { Lo, Hi };
7935 return DAG.getMergeValues(Ops, 2, dl);
7938 SDValue X86TargetLowering::LowerSINT_TO_FP(SDValue Op,
7939 SelectionDAG &DAG) const {
7940 EVT SrcVT = Op.getOperand(0).getValueType();
7942 if (SrcVT.isVector())
7945 assert(SrcVT.getSimpleVT() <= MVT::i64 && SrcVT.getSimpleVT() >= MVT::i16 &&
7946 "Unknown SINT_TO_FP to lower!");
7948 // These are really Legal; return the operand so the caller accepts it as
7950 if (SrcVT == MVT::i32 && isScalarFPTypeInSSEReg(Op.getValueType()))
7952 if (SrcVT == MVT::i64 && isScalarFPTypeInSSEReg(Op.getValueType()) &&
7953 Subtarget->is64Bit()) {
7957 DebugLoc dl = Op.getDebugLoc();
7958 unsigned Size = SrcVT.getSizeInBits()/8;
7959 MachineFunction &MF = DAG.getMachineFunction();
7960 int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size, false);
7961 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7962 SDValue Chain = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
7964 MachinePointerInfo::getFixedStack(SSFI),
7966 return BuildFILD(Op, SrcVT, Chain, StackSlot, DAG);
7969 SDValue X86TargetLowering::BuildFILD(SDValue Op, EVT SrcVT, SDValue Chain,
7971 SelectionDAG &DAG) const {
7973 DebugLoc DL = Op.getDebugLoc();
7975 bool useSSE = isScalarFPTypeInSSEReg(Op.getValueType());
7977 Tys = DAG.getVTList(MVT::f64, MVT::Other, MVT::Glue);
7979 Tys = DAG.getVTList(Op.getValueType(), MVT::Other);
7981 unsigned ByteSize = SrcVT.getSizeInBits()/8;
7983 FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(StackSlot);
7984 MachineMemOperand *MMO;
7986 int SSFI = FI->getIndex();
7988 DAG.getMachineFunction()
7989 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7990 MachineMemOperand::MOLoad, ByteSize, ByteSize);
7992 MMO = cast<LoadSDNode>(StackSlot)->getMemOperand();
7993 StackSlot = StackSlot.getOperand(1);
7995 SDValue Ops[] = { Chain, StackSlot, DAG.getValueType(SrcVT) };
7996 SDValue Result = DAG.getMemIntrinsicNode(useSSE ? X86ISD::FILD_FLAG :
7998 Tys, Ops, array_lengthof(Ops),
8002 Chain = Result.getValue(1);
8003 SDValue InFlag = Result.getValue(2);
8005 // FIXME: Currently the FST is flagged to the FILD_FLAG. This
8006 // shouldn't be necessary except that RFP cannot be live across
8007 // multiple blocks. When stackifier is fixed, they can be uncoupled.
8008 MachineFunction &MF = DAG.getMachineFunction();
8009 unsigned SSFISize = Op.getValueType().getSizeInBits()/8;
8010 int SSFI = MF.getFrameInfo()->CreateStackObject(SSFISize, SSFISize, false);
8011 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
8012 Tys = DAG.getVTList(MVT::Other);
8014 Chain, Result, StackSlot, DAG.getValueType(Op.getValueType()), InFlag
8016 MachineMemOperand *MMO =
8017 DAG.getMachineFunction()
8018 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
8019 MachineMemOperand::MOStore, SSFISize, SSFISize);
8021 Chain = DAG.getMemIntrinsicNode(X86ISD::FST, DL, Tys,
8022 Ops, array_lengthof(Ops),
8023 Op.getValueType(), MMO);
8024 Result = DAG.getLoad(Op.getValueType(), DL, Chain, StackSlot,
8025 MachinePointerInfo::getFixedStack(SSFI),
8026 false, false, false, 0);
8032 // LowerUINT_TO_FP_i64 - 64-bit unsigned integer to double expansion.
8033 SDValue X86TargetLowering::LowerUINT_TO_FP_i64(SDValue Op,
8034 SelectionDAG &DAG) const {
8035 // This algorithm is not obvious. Here it is what we're trying to output:
8038 punpckldq (c0), %xmm0 // c0: (uint4){ 0x43300000U, 0x45300000U, 0U, 0U }
8039 subpd (c1), %xmm0 // c1: (double2){ 0x1.0p52, 0x1.0p52 * 0x1.0p32 }
8043 pshufd $0x4e, %xmm0, %xmm1
8048 DebugLoc dl = Op.getDebugLoc();
8049 LLVMContext *Context = DAG.getContext();
8051 // Build some magic constants.
8052 const uint32_t CV0[] = { 0x43300000, 0x45300000, 0, 0 };
8053 Constant *C0 = ConstantDataVector::get(*Context, CV0);
8054 SDValue CPIdx0 = DAG.getConstantPool(C0, getPointerTy(), 16);
8056 SmallVector<Constant*,2> CV1;
8058 ConstantFP::get(*Context, APFloat(APFloat::IEEEdouble,
8059 APInt(64, 0x4330000000000000ULL))));
8061 ConstantFP::get(*Context, APFloat(APFloat::IEEEdouble,
8062 APInt(64, 0x4530000000000000ULL))));
8063 Constant *C1 = ConstantVector::get(CV1);
8064 SDValue CPIdx1 = DAG.getConstantPool(C1, getPointerTy(), 16);
8066 // Load the 64-bit value into an XMM register.
8067 SDValue XR1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64,
8069 SDValue CLod0 = DAG.getLoad(MVT::v4i32, dl, DAG.getEntryNode(), CPIdx0,
8070 MachinePointerInfo::getConstantPool(),
8071 false, false, false, 16);
8072 SDValue Unpck1 = getUnpackl(DAG, dl, MVT::v4i32,
8073 DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, XR1),
8076 SDValue CLod1 = DAG.getLoad(MVT::v2f64, dl, CLod0.getValue(1), CPIdx1,
8077 MachinePointerInfo::getConstantPool(),
8078 false, false, false, 16);
8079 SDValue XR2F = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Unpck1);
8080 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::v2f64, XR2F, CLod1);
8083 if (Subtarget->hasSSE3()) {
8084 // FIXME: The 'haddpd' instruction may be slower than 'movhlps + addsd'.
8085 Result = DAG.getNode(X86ISD::FHADD, dl, MVT::v2f64, Sub, Sub);
8087 SDValue S2F = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Sub);
8088 SDValue Shuffle = getTargetShuffleNode(X86ISD::PSHUFD, dl, MVT::v4i32,
8090 Result = DAG.getNode(ISD::FADD, dl, MVT::v2f64,
8091 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Shuffle),
8095 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Result,
8096 DAG.getIntPtrConstant(0));
8099 // LowerUINT_TO_FP_i32 - 32-bit unsigned integer to float expansion.
8100 SDValue X86TargetLowering::LowerUINT_TO_FP_i32(SDValue Op,
8101 SelectionDAG &DAG) const {
8102 DebugLoc dl = Op.getDebugLoc();
8103 // FP constant to bias correct the final result.
8104 SDValue Bias = DAG.getConstantFP(BitsToDouble(0x4330000000000000ULL),
8107 // Load the 32-bit value into an XMM register.
8108 SDValue Load = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,
8111 // Zero out the upper parts of the register.
8112 Load = getShuffleVectorZeroOrUndef(Load, 0, true, Subtarget, DAG);
8114 Load = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
8115 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Load),
8116 DAG.getIntPtrConstant(0));
8118 // Or the load with the bias.
8119 SDValue Or = DAG.getNode(ISD::OR, dl, MVT::v2i64,
8120 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
8121 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
8123 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
8124 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
8125 MVT::v2f64, Bias)));
8126 Or = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
8127 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Or),
8128 DAG.getIntPtrConstant(0));
8130 // Subtract the bias.
8131 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::f64, Or, Bias);
8133 // Handle final rounding.
8134 EVT DestVT = Op.getValueType();
8136 if (DestVT.bitsLT(MVT::f64))
8137 return DAG.getNode(ISD::FP_ROUND, dl, DestVT, Sub,
8138 DAG.getIntPtrConstant(0));
8139 if (DestVT.bitsGT(MVT::f64))
8140 return DAG.getNode(ISD::FP_EXTEND, dl, DestVT, Sub);
8142 // Handle final rounding.
8146 SDValue X86TargetLowering::lowerUINT_TO_FP_vec(SDValue Op,
8147 SelectionDAG &DAG) const {
8148 SDValue N0 = Op.getOperand(0);
8149 EVT SVT = N0.getValueType();
8150 DebugLoc dl = Op.getDebugLoc();
8152 assert((SVT == MVT::v4i8 || SVT == MVT::v4i16 ||
8153 SVT == MVT::v8i8 || SVT == MVT::v8i16) &&
8154 "Custom UINT_TO_FP is not supported!");
8156 EVT NVT = EVT::getVectorVT(*DAG.getContext(), MVT::i32,
8157 SVT.getVectorNumElements());
8158 return DAG.getNode(ISD::SINT_TO_FP, dl, Op.getValueType(),
8159 DAG.getNode(ISD::ZERO_EXTEND, dl, NVT, N0));
8162 SDValue X86TargetLowering::LowerUINT_TO_FP(SDValue Op,
8163 SelectionDAG &DAG) const {
8164 SDValue N0 = Op.getOperand(0);
8165 DebugLoc dl = Op.getDebugLoc();
8167 if (Op.getValueType().isVector())
8168 return lowerUINT_TO_FP_vec(Op, DAG);
8170 // Since UINT_TO_FP is legal (it's marked custom), dag combiner won't
8171 // optimize it to a SINT_TO_FP when the sign bit is known zero. Perform
8172 // the optimization here.
8173 if (DAG.SignBitIsZero(N0))
8174 return DAG.getNode(ISD::SINT_TO_FP, dl, Op.getValueType(), N0);
8176 EVT SrcVT = N0.getValueType();
8177 EVT DstVT = Op.getValueType();
8178 if (SrcVT == MVT::i64 && DstVT == MVT::f64 && X86ScalarSSEf64)
8179 return LowerUINT_TO_FP_i64(Op, DAG);
8180 if (SrcVT == MVT::i32 && X86ScalarSSEf64)
8181 return LowerUINT_TO_FP_i32(Op, DAG);
8182 if (Subtarget->is64Bit() && SrcVT == MVT::i64 && DstVT == MVT::f32)
8185 // Make a 64-bit buffer, and use it to build an FILD.
8186 SDValue StackSlot = DAG.CreateStackTemporary(MVT::i64);
8187 if (SrcVT == MVT::i32) {
8188 SDValue WordOff = DAG.getConstant(4, getPointerTy());
8189 SDValue OffsetSlot = DAG.getNode(ISD::ADD, dl,
8190 getPointerTy(), StackSlot, WordOff);
8191 SDValue Store1 = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
8192 StackSlot, MachinePointerInfo(),
8194 SDValue Store2 = DAG.getStore(Store1, dl, DAG.getConstant(0, MVT::i32),
8195 OffsetSlot, MachinePointerInfo(),
8197 SDValue Fild = BuildFILD(Op, MVT::i64, Store2, StackSlot, DAG);
8201 assert(SrcVT == MVT::i64 && "Unexpected type in UINT_TO_FP");
8202 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
8203 StackSlot, MachinePointerInfo(),
8205 // For i64 source, we need to add the appropriate power of 2 if the input
8206 // was negative. This is the same as the optimization in
8207 // DAGTypeLegalizer::ExpandIntOp_UNIT_TO_FP, and for it to be safe here,
8208 // we must be careful to do the computation in x87 extended precision, not
8209 // in SSE. (The generic code can't know it's OK to do this, or how to.)
8210 int SSFI = cast<FrameIndexSDNode>(StackSlot)->getIndex();
8211 MachineMemOperand *MMO =
8212 DAG.getMachineFunction()
8213 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
8214 MachineMemOperand::MOLoad, 8, 8);
8216 SDVTList Tys = DAG.getVTList(MVT::f80, MVT::Other);
8217 SDValue Ops[] = { Store, StackSlot, DAG.getValueType(MVT::i64) };
8218 SDValue Fild = DAG.getMemIntrinsicNode(X86ISD::FILD, dl, Tys, Ops, 3,
8221 APInt FF(32, 0x5F800000ULL);
8223 // Check whether the sign bit is set.
8224 SDValue SignSet = DAG.getSetCC(dl, getSetCCResultType(MVT::i64),
8225 Op.getOperand(0), DAG.getConstant(0, MVT::i64),
8228 // Build a 64 bit pair (0, FF) in the constant pool, with FF in the lo bits.
8229 SDValue FudgePtr = DAG.getConstantPool(
8230 ConstantInt::get(*DAG.getContext(), FF.zext(64)),
8233 // Get a pointer to FF if the sign bit was set, or to 0 otherwise.
8234 SDValue Zero = DAG.getIntPtrConstant(0);
8235 SDValue Four = DAG.getIntPtrConstant(4);
8236 SDValue Offset = DAG.getNode(ISD::SELECT, dl, Zero.getValueType(), SignSet,
8238 FudgePtr = DAG.getNode(ISD::ADD, dl, getPointerTy(), FudgePtr, Offset);
8240 // Load the value out, extending it from f32 to f80.
8241 // FIXME: Avoid the extend by constructing the right constant pool?
8242 SDValue Fudge = DAG.getExtLoad(ISD::EXTLOAD, dl, MVT::f80, DAG.getEntryNode(),
8243 FudgePtr, MachinePointerInfo::getConstantPool(),
8244 MVT::f32, false, false, 4);
8245 // Extend everything to 80 bits to force it to be done on x87.
8246 SDValue Add = DAG.getNode(ISD::FADD, dl, MVT::f80, Fild, Fudge);
8247 return DAG.getNode(ISD::FP_ROUND, dl, DstVT, Add, DAG.getIntPtrConstant(0));
8250 std::pair<SDValue,SDValue>
8251 X86TargetLowering:: FP_TO_INTHelper(SDValue Op, SelectionDAG &DAG,
8252 bool IsSigned, bool IsReplace) const {
8253 DebugLoc DL = Op.getDebugLoc();
8255 EVT DstTy = Op.getValueType();
8257 if (!IsSigned && !isIntegerTypeFTOL(DstTy)) {
8258 assert(DstTy == MVT::i32 && "Unexpected FP_TO_UINT");
8262 assert(DstTy.getSimpleVT() <= MVT::i64 &&
8263 DstTy.getSimpleVT() >= MVT::i16 &&
8264 "Unknown FP_TO_INT to lower!");
8266 // These are really Legal.
8267 if (DstTy == MVT::i32 &&
8268 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
8269 return std::make_pair(SDValue(), SDValue());
8270 if (Subtarget->is64Bit() &&
8271 DstTy == MVT::i64 &&
8272 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
8273 return std::make_pair(SDValue(), SDValue());
8275 // We lower FP->int64 either into FISTP64 followed by a load from a temporary
8276 // stack slot, or into the FTOL runtime function.
8277 MachineFunction &MF = DAG.getMachineFunction();
8278 unsigned MemSize = DstTy.getSizeInBits()/8;
8279 int SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize, false);
8280 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
8283 if (!IsSigned && isIntegerTypeFTOL(DstTy))
8284 Opc = X86ISD::WIN_FTOL;
8286 switch (DstTy.getSimpleVT().SimpleTy) {
8287 default: llvm_unreachable("Invalid FP_TO_SINT to lower!");
8288 case MVT::i16: Opc = X86ISD::FP_TO_INT16_IN_MEM; break;
8289 case MVT::i32: Opc = X86ISD::FP_TO_INT32_IN_MEM; break;
8290 case MVT::i64: Opc = X86ISD::FP_TO_INT64_IN_MEM; break;
8293 SDValue Chain = DAG.getEntryNode();
8294 SDValue Value = Op.getOperand(0);
8295 EVT TheVT = Op.getOperand(0).getValueType();
8296 // FIXME This causes a redundant load/store if the SSE-class value is already
8297 // in memory, such as if it is on the callstack.
8298 if (isScalarFPTypeInSSEReg(TheVT)) {
8299 assert(DstTy == MVT::i64 && "Invalid FP_TO_SINT to lower!");
8300 Chain = DAG.getStore(Chain, DL, Value, StackSlot,
8301 MachinePointerInfo::getFixedStack(SSFI),
8303 SDVTList Tys = DAG.getVTList(Op.getOperand(0).getValueType(), MVT::Other);
8305 Chain, StackSlot, DAG.getValueType(TheVT)
8308 MachineMemOperand *MMO =
8309 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
8310 MachineMemOperand::MOLoad, MemSize, MemSize);
8311 Value = DAG.getMemIntrinsicNode(X86ISD::FLD, DL, Tys, Ops, 3,
8313 Chain = Value.getValue(1);
8314 SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize, false);
8315 StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
8318 MachineMemOperand *MMO =
8319 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
8320 MachineMemOperand::MOStore, MemSize, MemSize);
8322 if (Opc != X86ISD::WIN_FTOL) {
8323 // Build the FP_TO_INT*_IN_MEM
8324 SDValue Ops[] = { Chain, Value, StackSlot };
8325 SDValue FIST = DAG.getMemIntrinsicNode(Opc, DL, DAG.getVTList(MVT::Other),
8326 Ops, 3, DstTy, MMO);
8327 return std::make_pair(FIST, StackSlot);
8329 SDValue ftol = DAG.getNode(X86ISD::WIN_FTOL, DL,
8330 DAG.getVTList(MVT::Other, MVT::Glue),
8332 SDValue eax = DAG.getCopyFromReg(ftol, DL, X86::EAX,
8333 MVT::i32, ftol.getValue(1));
8334 SDValue edx = DAG.getCopyFromReg(eax.getValue(1), DL, X86::EDX,
8335 MVT::i32, eax.getValue(2));
8336 SDValue Ops[] = { eax, edx };
8337 SDValue pair = IsReplace
8338 ? DAG.getNode(ISD::BUILD_PAIR, DL, MVT::i64, Ops, 2)
8339 : DAG.getMergeValues(Ops, 2, DL);
8340 return std::make_pair(pair, SDValue());
8344 static SDValue LowerAVXExtend(SDValue Op, SelectionDAG &DAG,
8345 const X86Subtarget *Subtarget) {
8346 MVT VT = Op->getValueType(0).getSimpleVT();
8347 SDValue In = Op->getOperand(0);
8348 MVT InVT = In.getValueType().getSimpleVT();
8349 DebugLoc dl = Op->getDebugLoc();
8351 // Optimize vectors in AVX mode:
8354 // Use vpunpcklwd for 4 lower elements v8i16 -> v4i32.
8355 // Use vpunpckhwd for 4 upper elements v8i16 -> v4i32.
8356 // Concat upper and lower parts.
8359 // Use vpunpckldq for 4 lower elements v4i32 -> v2i64.
8360 // Use vpunpckhdq for 4 upper elements v4i32 -> v2i64.
8361 // Concat upper and lower parts.
8364 if (((VT != MVT::v8i32) || (InVT != MVT::v8i16)) &&
8365 ((VT != MVT::v4i64) || (InVT != MVT::v4i32)))
8368 if (Subtarget->hasInt256())
8369 return DAG.getNode(X86ISD::VZEXT_MOVL, dl, VT, In);
8371 SDValue ZeroVec = getZeroVector(InVT, Subtarget, DAG, dl);
8372 SDValue Undef = DAG.getUNDEF(InVT);
8373 bool NeedZero = Op.getOpcode() == ISD::ZERO_EXTEND;
8374 SDValue OpLo = getUnpackl(DAG, dl, InVT, In, NeedZero ? ZeroVec : Undef);
8375 SDValue OpHi = getUnpackh(DAG, dl, InVT, In, NeedZero ? ZeroVec : Undef);
8377 MVT HVT = MVT::getVectorVT(VT.getVectorElementType(),
8378 VT.getVectorNumElements()/2);
8380 OpLo = DAG.getNode(ISD::BITCAST, dl, HVT, OpLo);
8381 OpHi = DAG.getNode(ISD::BITCAST, dl, HVT, OpHi);
8383 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, OpLo, OpHi);
8386 SDValue X86TargetLowering::LowerANY_EXTEND(SDValue Op,
8387 SelectionDAG &DAG) const {
8388 if (Subtarget->hasFp256()) {
8389 SDValue Res = LowerAVXExtend(Op, DAG, Subtarget);
8396 SDValue X86TargetLowering::LowerZERO_EXTEND(SDValue Op,
8397 SelectionDAG &DAG) const {
8398 DebugLoc DL = Op.getDebugLoc();
8399 MVT VT = Op.getValueType().getSimpleVT();
8400 SDValue In = Op.getOperand(0);
8401 MVT SVT = In.getValueType().getSimpleVT();
8403 if (Subtarget->hasFp256()) {
8404 SDValue Res = LowerAVXExtend(Op, DAG, Subtarget);
8409 if (!VT.is256BitVector() || !SVT.is128BitVector() ||
8410 VT.getVectorNumElements() != SVT.getVectorNumElements())
8413 assert(Subtarget->hasFp256() && "256-bit vector is observed without AVX!");
8415 // AVX2 has better support of integer extending.
8416 if (Subtarget->hasInt256())
8417 return DAG.getNode(X86ISD::VZEXT, DL, VT, In);
8419 SDValue Lo = DAG.getNode(X86ISD::VZEXT, DL, MVT::v4i32, In);
8420 static const int Mask[] = {4, 5, 6, 7, -1, -1, -1, -1};
8421 SDValue Hi = DAG.getNode(X86ISD::VZEXT, DL, MVT::v4i32,
8422 DAG.getVectorShuffle(MVT::v8i16, DL, In,
8423 DAG.getUNDEF(MVT::v8i16),
8426 return DAG.getNode(ISD::CONCAT_VECTORS, DL, MVT::v8i32, Lo, Hi);
8429 SDValue X86TargetLowering::LowerTRUNCATE(SDValue Op, SelectionDAG &DAG) const {
8430 DebugLoc DL = Op.getDebugLoc();
8431 MVT VT = Op.getValueType().getSimpleVT();
8432 SDValue In = Op.getOperand(0);
8433 MVT SVT = In.getValueType().getSimpleVT();
8435 if ((VT == MVT::v4i32) && (SVT == MVT::v4i64)) {
8436 // On AVX2, v4i64 -> v4i32 becomes VPERMD.
8437 if (Subtarget->hasInt256()) {
8438 static const int ShufMask[] = {0, 2, 4, 6, -1, -1, -1, -1};
8439 In = DAG.getNode(ISD::BITCAST, DL, MVT::v8i32, In);
8440 In = DAG.getVectorShuffle(MVT::v8i32, DL, In, DAG.getUNDEF(MVT::v8i32),
8442 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, In,
8443 DAG.getIntPtrConstant(0));
8446 // On AVX, v4i64 -> v4i32 becomes a sequence that uses PSHUFD and MOVLHPS.
8447 SDValue OpLo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v2i64, In,
8448 DAG.getIntPtrConstant(0));
8449 SDValue OpHi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v2i64, In,
8450 DAG.getIntPtrConstant(2));
8452 OpLo = DAG.getNode(ISD::BITCAST, DL, MVT::v4i32, OpLo);
8453 OpHi = DAG.getNode(ISD::BITCAST, DL, MVT::v4i32, OpHi);
8456 static const int ShufMask1[] = {0, 2, 0, 0};
8457 SDValue Undef = DAG.getUNDEF(VT);
8458 OpLo = DAG.getVectorShuffle(VT, DL, OpLo, Undef, ShufMask1);
8459 OpHi = DAG.getVectorShuffle(VT, DL, OpHi, Undef, ShufMask1);
8461 // The MOVLHPS mask:
8462 static const int ShufMask2[] = {0, 1, 4, 5};
8463 return DAG.getVectorShuffle(VT, DL, OpLo, OpHi, ShufMask2);
8466 if ((VT == MVT::v8i16) && (SVT == MVT::v8i32)) {
8467 // On AVX2, v8i32 -> v8i16 becomed PSHUFB.
8468 if (Subtarget->hasInt256()) {
8469 In = DAG.getNode(ISD::BITCAST, DL, MVT::v32i8, In);
8471 SmallVector<SDValue,32> pshufbMask;
8472 for (unsigned i = 0; i < 2; ++i) {
8473 pshufbMask.push_back(DAG.getConstant(0x0, MVT::i8));
8474 pshufbMask.push_back(DAG.getConstant(0x1, MVT::i8));
8475 pshufbMask.push_back(DAG.getConstant(0x4, MVT::i8));
8476 pshufbMask.push_back(DAG.getConstant(0x5, MVT::i8));
8477 pshufbMask.push_back(DAG.getConstant(0x8, MVT::i8));
8478 pshufbMask.push_back(DAG.getConstant(0x9, MVT::i8));
8479 pshufbMask.push_back(DAG.getConstant(0xc, MVT::i8));
8480 pshufbMask.push_back(DAG.getConstant(0xd, MVT::i8));
8481 for (unsigned j = 0; j < 8; ++j)
8482 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
8484 SDValue BV = DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v32i8,
8485 &pshufbMask[0], 32);
8486 In = DAG.getNode(X86ISD::PSHUFB, DL, MVT::v32i8, In, BV);
8487 In = DAG.getNode(ISD::BITCAST, DL, MVT::v4i64, In);
8489 static const int ShufMask[] = {0, 2, -1, -1};
8490 In = DAG.getVectorShuffle(MVT::v4i64, DL, In, DAG.getUNDEF(MVT::v4i64),
8492 In = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v2i64, In,
8493 DAG.getIntPtrConstant(0));
8494 return DAG.getNode(ISD::BITCAST, DL, VT, In);
8497 SDValue OpLo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v4i32, In,
8498 DAG.getIntPtrConstant(0));
8500 SDValue OpHi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v4i32, In,
8501 DAG.getIntPtrConstant(4));
8503 OpLo = DAG.getNode(ISD::BITCAST, DL, MVT::v16i8, OpLo);
8504 OpHi = DAG.getNode(ISD::BITCAST, DL, MVT::v16i8, OpHi);
8507 static const int ShufMask1[] = {0, 1, 4, 5, 8, 9, 12, 13,
8508 -1, -1, -1, -1, -1, -1, -1, -1};
8510 SDValue Undef = DAG.getUNDEF(MVT::v16i8);
8511 OpLo = DAG.getVectorShuffle(MVT::v16i8, DL, OpLo, Undef, ShufMask1);
8512 OpHi = DAG.getVectorShuffle(MVT::v16i8, DL, OpHi, Undef, ShufMask1);
8514 OpLo = DAG.getNode(ISD::BITCAST, DL, MVT::v4i32, OpLo);
8515 OpHi = DAG.getNode(ISD::BITCAST, DL, MVT::v4i32, OpHi);
8517 // The MOVLHPS Mask:
8518 static const int ShufMask2[] = {0, 1, 4, 5};
8519 SDValue res = DAG.getVectorShuffle(MVT::v4i32, DL, OpLo, OpHi, ShufMask2);
8520 return DAG.getNode(ISD::BITCAST, DL, MVT::v8i16, res);
8523 // Handle truncation of V256 to V128 using shuffles.
8524 if (!VT.is128BitVector() || !SVT.is256BitVector())
8527 assert(VT.getVectorNumElements() != SVT.getVectorNumElements() &&
8529 assert(Subtarget->hasFp256() && "256-bit vector without AVX!");
8531 unsigned NumElems = VT.getVectorNumElements();
8532 EVT NVT = EVT::getVectorVT(*DAG.getContext(), VT.getVectorElementType(),
8535 SmallVector<int, 16> MaskVec(NumElems * 2, -1);
8536 // Prepare truncation shuffle mask
8537 for (unsigned i = 0; i != NumElems; ++i)
8539 SDValue V = DAG.getVectorShuffle(NVT, DL,
8540 DAG.getNode(ISD::BITCAST, DL, NVT, In),
8541 DAG.getUNDEF(NVT), &MaskVec[0]);
8542 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, V,
8543 DAG.getIntPtrConstant(0));
8546 SDValue X86TargetLowering::LowerFP_TO_SINT(SDValue Op,
8547 SelectionDAG &DAG) const {
8548 MVT VT = Op.getValueType().getSimpleVT();
8549 if (VT.isVector()) {
8550 if (VT == MVT::v8i16)
8551 return DAG.getNode(ISD::TRUNCATE, Op.getDebugLoc(), VT,
8552 DAG.getNode(ISD::FP_TO_SINT, Op.getDebugLoc(),
8553 MVT::v8i32, Op.getOperand(0)));
8557 std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG,
8558 /*IsSigned=*/ true, /*IsReplace=*/ false);
8559 SDValue FIST = Vals.first, StackSlot = Vals.second;
8560 // If FP_TO_INTHelper failed, the node is actually supposed to be Legal.
8561 if (FIST.getNode() == 0) return Op;
8563 if (StackSlot.getNode())
8565 return DAG.getLoad(Op.getValueType(), Op.getDebugLoc(),
8566 FIST, StackSlot, MachinePointerInfo(),
8567 false, false, false, 0);
8569 // The node is the result.
8573 SDValue X86TargetLowering::LowerFP_TO_UINT(SDValue Op,
8574 SelectionDAG &DAG) const {
8575 std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG,
8576 /*IsSigned=*/ false, /*IsReplace=*/ false);
8577 SDValue FIST = Vals.first, StackSlot = Vals.second;
8578 assert(FIST.getNode() && "Unexpected failure");
8580 if (StackSlot.getNode())
8582 return DAG.getLoad(Op.getValueType(), Op.getDebugLoc(),
8583 FIST, StackSlot, MachinePointerInfo(),
8584 false, false, false, 0);
8586 // The node is the result.
8590 static SDValue LowerFP_EXTEND(SDValue Op, SelectionDAG &DAG) {
8591 DebugLoc DL = Op.getDebugLoc();
8592 MVT VT = Op.getValueType().getSimpleVT();
8593 SDValue In = Op.getOperand(0);
8594 MVT SVT = In.getValueType().getSimpleVT();
8596 assert(SVT == MVT::v2f32 && "Only customize MVT::v2f32 type legalization!");
8598 return DAG.getNode(X86ISD::VFPEXT, DL, VT,
8599 DAG.getNode(ISD::CONCAT_VECTORS, DL, MVT::v4f32,
8600 In, DAG.getUNDEF(SVT)));
8603 SDValue X86TargetLowering::LowerFABS(SDValue Op, SelectionDAG &DAG) const {
8604 LLVMContext *Context = DAG.getContext();
8605 DebugLoc dl = Op.getDebugLoc();
8606 MVT VT = Op.getValueType().getSimpleVT();
8608 unsigned NumElts = VT == MVT::f64 ? 2 : 4;
8609 if (VT.isVector()) {
8610 EltVT = VT.getVectorElementType();
8611 NumElts = VT.getVectorNumElements();
8614 if (EltVT == MVT::f64)
8615 C = ConstantFP::get(*Context, APFloat(APFloat::IEEEdouble,
8616 APInt(64, ~(1ULL << 63))));
8618 C = ConstantFP::get(*Context, APFloat(APFloat::IEEEsingle,
8619 APInt(32, ~(1U << 31))));
8620 C = ConstantVector::getSplat(NumElts, C);
8621 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy());
8622 unsigned Alignment = cast<ConstantPoolSDNode>(CPIdx)->getAlignment();
8623 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
8624 MachinePointerInfo::getConstantPool(),
8625 false, false, false, Alignment);
8626 if (VT.isVector()) {
8627 MVT ANDVT = VT.is128BitVector() ? MVT::v2i64 : MVT::v4i64;
8628 return DAG.getNode(ISD::BITCAST, dl, VT,
8629 DAG.getNode(ISD::AND, dl, ANDVT,
8630 DAG.getNode(ISD::BITCAST, dl, ANDVT,
8632 DAG.getNode(ISD::BITCAST, dl, ANDVT, Mask)));
8634 return DAG.getNode(X86ISD::FAND, dl, VT, Op.getOperand(0), Mask);
8637 SDValue X86TargetLowering::LowerFNEG(SDValue Op, SelectionDAG &DAG) const {
8638 LLVMContext *Context = DAG.getContext();
8639 DebugLoc dl = Op.getDebugLoc();
8640 MVT VT = Op.getValueType().getSimpleVT();
8642 unsigned NumElts = VT == MVT::f64 ? 2 : 4;
8643 if (VT.isVector()) {
8644 EltVT = VT.getVectorElementType();
8645 NumElts = VT.getVectorNumElements();
8648 if (EltVT == MVT::f64)
8649 C = ConstantFP::get(*Context, APFloat(APFloat::IEEEdouble,
8650 APInt(64, 1ULL << 63)));
8652 C = ConstantFP::get(*Context, APFloat(APFloat::IEEEsingle,
8653 APInt(32, 1U << 31)));
8654 C = ConstantVector::getSplat(NumElts, C);
8655 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy());
8656 unsigned Alignment = cast<ConstantPoolSDNode>(CPIdx)->getAlignment();
8657 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
8658 MachinePointerInfo::getConstantPool(),
8659 false, false, false, Alignment);
8660 if (VT.isVector()) {
8661 MVT XORVT = VT.is128BitVector() ? MVT::v2i64 : MVT::v4i64;
8662 return DAG.getNode(ISD::BITCAST, dl, VT,
8663 DAG.getNode(ISD::XOR, dl, XORVT,
8664 DAG.getNode(ISD::BITCAST, dl, XORVT,
8666 DAG.getNode(ISD::BITCAST, dl, XORVT, Mask)));
8669 return DAG.getNode(X86ISD::FXOR, dl, VT, Op.getOperand(0), Mask);
8672 SDValue X86TargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
8673 LLVMContext *Context = DAG.getContext();
8674 SDValue Op0 = Op.getOperand(0);
8675 SDValue Op1 = Op.getOperand(1);
8676 DebugLoc dl = Op.getDebugLoc();
8677 MVT VT = Op.getValueType().getSimpleVT();
8678 MVT SrcVT = Op1.getValueType().getSimpleVT();
8680 // If second operand is smaller, extend it first.
8681 if (SrcVT.bitsLT(VT)) {
8682 Op1 = DAG.getNode(ISD::FP_EXTEND, dl, VT, Op1);
8685 // And if it is bigger, shrink it first.
8686 if (SrcVT.bitsGT(VT)) {
8687 Op1 = DAG.getNode(ISD::FP_ROUND, dl, VT, Op1, DAG.getIntPtrConstant(1));
8691 // At this point the operands and the result should have the same
8692 // type, and that won't be f80 since that is not custom lowered.
8694 // First get the sign bit of second operand.
8695 SmallVector<Constant*,4> CV;
8696 if (SrcVT == MVT::f64) {
8697 const fltSemantics &Sem = APFloat::IEEEdouble;
8698 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(64, 1ULL << 63))));
8699 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(64, 0))));
8701 const fltSemantics &Sem = APFloat::IEEEsingle;
8702 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 1U << 31))));
8703 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 0))));
8704 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 0))));
8705 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 0))));
8707 Constant *C = ConstantVector::get(CV);
8708 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
8709 SDValue Mask1 = DAG.getLoad(SrcVT, dl, DAG.getEntryNode(), CPIdx,
8710 MachinePointerInfo::getConstantPool(),
8711 false, false, false, 16);
8712 SDValue SignBit = DAG.getNode(X86ISD::FAND, dl, SrcVT, Op1, Mask1);
8714 // Shift sign bit right or left if the two operands have different types.
8715 if (SrcVT.bitsGT(VT)) {
8716 // Op0 is MVT::f32, Op1 is MVT::f64.
8717 SignBit = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f64, SignBit);
8718 SignBit = DAG.getNode(X86ISD::FSRL, dl, MVT::v2f64, SignBit,
8719 DAG.getConstant(32, MVT::i32));
8720 SignBit = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, SignBit);
8721 SignBit = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, SignBit,
8722 DAG.getIntPtrConstant(0));
8725 // Clear first operand sign bit.
8727 if (VT == MVT::f64) {
8728 const fltSemantics &Sem = APFloat::IEEEdouble;
8729 CV.push_back(ConstantFP::get(*Context, APFloat(Sem,
8730 APInt(64, ~(1ULL << 63)))));
8731 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(64, 0))));
8733 const fltSemantics &Sem = APFloat::IEEEsingle;
8734 CV.push_back(ConstantFP::get(*Context, APFloat(Sem,
8735 APInt(32, ~(1U << 31)))));
8736 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 0))));
8737 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 0))));
8738 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 0))));
8740 C = ConstantVector::get(CV);
8741 CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
8742 SDValue Mask2 = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
8743 MachinePointerInfo::getConstantPool(),
8744 false, false, false, 16);
8745 SDValue Val = DAG.getNode(X86ISD::FAND, dl, VT, Op0, Mask2);
8747 // Or the value with the sign bit.
8748 return DAG.getNode(X86ISD::FOR, dl, VT, Val, SignBit);
8751 static SDValue LowerFGETSIGN(SDValue Op, SelectionDAG &DAG) {
8752 SDValue N0 = Op.getOperand(0);
8753 DebugLoc dl = Op.getDebugLoc();
8754 MVT VT = Op.getValueType().getSimpleVT();
8756 // Lower ISD::FGETSIGN to (AND (X86ISD::FGETSIGNx86 ...) 1).
8757 SDValue xFGETSIGN = DAG.getNode(X86ISD::FGETSIGNx86, dl, VT, N0,
8758 DAG.getConstant(1, VT));
8759 return DAG.getNode(ISD::AND, dl, VT, xFGETSIGN, DAG.getConstant(1, VT));
8762 // LowerVectorAllZeroTest - Check whether an OR'd tree is PTEST-able.
8764 SDValue X86TargetLowering::LowerVectorAllZeroTest(SDValue Op,
8765 SelectionDAG &DAG) const {
8766 assert(Op.getOpcode() == ISD::OR && "Only check OR'd tree.");
8768 if (!Subtarget->hasSSE41())
8771 if (!Op->hasOneUse())
8774 SDNode *N = Op.getNode();
8775 DebugLoc DL = N->getDebugLoc();
8777 SmallVector<SDValue, 8> Opnds;
8778 DenseMap<SDValue, unsigned> VecInMap;
8779 EVT VT = MVT::Other;
8781 // Recognize a special case where a vector is casted into wide integer to
8783 Opnds.push_back(N->getOperand(0));
8784 Opnds.push_back(N->getOperand(1));
8786 for (unsigned Slot = 0, e = Opnds.size(); Slot < e; ++Slot) {
8787 SmallVector<SDValue, 8>::const_iterator I = Opnds.begin() + Slot;
8788 // BFS traverse all OR'd operands.
8789 if (I->getOpcode() == ISD::OR) {
8790 Opnds.push_back(I->getOperand(0));
8791 Opnds.push_back(I->getOperand(1));
8792 // Re-evaluate the number of nodes to be traversed.
8793 e += 2; // 2 more nodes (LHS and RHS) are pushed.
8797 // Quit if a non-EXTRACT_VECTOR_ELT
8798 if (I->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
8801 // Quit if without a constant index.
8802 SDValue Idx = I->getOperand(1);
8803 if (!isa<ConstantSDNode>(Idx))
8806 SDValue ExtractedFromVec = I->getOperand(0);
8807 DenseMap<SDValue, unsigned>::iterator M = VecInMap.find(ExtractedFromVec);
8808 if (M == VecInMap.end()) {
8809 VT = ExtractedFromVec.getValueType();
8810 // Quit if not 128/256-bit vector.
8811 if (!VT.is128BitVector() && !VT.is256BitVector())
8813 // Quit if not the same type.
8814 if (VecInMap.begin() != VecInMap.end() &&
8815 VT != VecInMap.begin()->first.getValueType())
8817 M = VecInMap.insert(std::make_pair(ExtractedFromVec, 0)).first;
8819 M->second |= 1U << cast<ConstantSDNode>(Idx)->getZExtValue();
8822 assert((VT.is128BitVector() || VT.is256BitVector()) &&
8823 "Not extracted from 128-/256-bit vector.");
8825 unsigned FullMask = (1U << VT.getVectorNumElements()) - 1U;
8826 SmallVector<SDValue, 8> VecIns;
8828 for (DenseMap<SDValue, unsigned>::const_iterator
8829 I = VecInMap.begin(), E = VecInMap.end(); I != E; ++I) {
8830 // Quit if not all elements are used.
8831 if (I->second != FullMask)
8833 VecIns.push_back(I->first);
8836 EVT TestVT = VT.is128BitVector() ? MVT::v2i64 : MVT::v4i64;
8838 // Cast all vectors into TestVT for PTEST.
8839 for (unsigned i = 0, e = VecIns.size(); i < e; ++i)
8840 VecIns[i] = DAG.getNode(ISD::BITCAST, DL, TestVT, VecIns[i]);
8842 // If more than one full vectors are evaluated, OR them first before PTEST.
8843 for (unsigned Slot = 0, e = VecIns.size(); e - Slot > 1; Slot += 2, e += 1) {
8844 // Each iteration will OR 2 nodes and append the result until there is only
8845 // 1 node left, i.e. the final OR'd value of all vectors.
8846 SDValue LHS = VecIns[Slot];
8847 SDValue RHS = VecIns[Slot + 1];
8848 VecIns.push_back(DAG.getNode(ISD::OR, DL, TestVT, LHS, RHS));
8851 return DAG.getNode(X86ISD::PTEST, DL, MVT::i32,
8852 VecIns.back(), VecIns.back());
8855 /// Emit nodes that will be selected as "test Op0,Op0", or something
8857 SDValue X86TargetLowering::EmitTest(SDValue Op, unsigned X86CC,
8858 SelectionDAG &DAG) const {
8859 DebugLoc dl = Op.getDebugLoc();
8861 // CF and OF aren't always set the way we want. Determine which
8862 // of these we need.
8863 bool NeedCF = false;
8864 bool NeedOF = false;
8867 case X86::COND_A: case X86::COND_AE:
8868 case X86::COND_B: case X86::COND_BE:
8871 case X86::COND_G: case X86::COND_GE:
8872 case X86::COND_L: case X86::COND_LE:
8873 case X86::COND_O: case X86::COND_NO:
8878 // See if we can use the EFLAGS value from the operand instead of
8879 // doing a separate TEST. TEST always sets OF and CF to 0, so unless
8880 // we prove that the arithmetic won't overflow, we can't use OF or CF.
8881 if (Op.getResNo() != 0 || NeedOF || NeedCF)
8882 // Emit a CMP with 0, which is the TEST pattern.
8883 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
8884 DAG.getConstant(0, Op.getValueType()));
8886 unsigned Opcode = 0;
8887 unsigned NumOperands = 0;
8889 // Truncate operations may prevent the merge of the SETCC instruction
8890 // and the arithmetic intruction before it. Attempt to truncate the operands
8891 // of the arithmetic instruction and use a reduced bit-width instruction.
8892 bool NeedTruncation = false;
8893 SDValue ArithOp = Op;
8894 if (Op->getOpcode() == ISD::TRUNCATE && Op->hasOneUse()) {
8895 SDValue Arith = Op->getOperand(0);
8896 // Both the trunc and the arithmetic op need to have one user each.
8897 if (Arith->hasOneUse())
8898 switch (Arith.getOpcode()) {
8905 NeedTruncation = true;
8911 // NOTICE: In the code below we use ArithOp to hold the arithmetic operation
8912 // which may be the result of a CAST. We use the variable 'Op', which is the
8913 // non-casted variable when we check for possible users.
8914 switch (ArithOp.getOpcode()) {
8916 // Due to an isel shortcoming, be conservative if this add is likely to be
8917 // selected as part of a load-modify-store instruction. When the root node
8918 // in a match is a store, isel doesn't know how to remap non-chain non-flag
8919 // uses of other nodes in the match, such as the ADD in this case. This
8920 // leads to the ADD being left around and reselected, with the result being
8921 // two adds in the output. Alas, even if none our users are stores, that
8922 // doesn't prove we're O.K. Ergo, if we have any parents that aren't
8923 // CopyToReg or SETCC, eschew INC/DEC. A better fix seems to require
8924 // climbing the DAG back to the root, and it doesn't seem to be worth the
8926 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
8927 UE = Op.getNode()->use_end(); UI != UE; ++UI)
8928 if (UI->getOpcode() != ISD::CopyToReg &&
8929 UI->getOpcode() != ISD::SETCC &&
8930 UI->getOpcode() != ISD::STORE)
8933 if (ConstantSDNode *C =
8934 dyn_cast<ConstantSDNode>(ArithOp.getNode()->getOperand(1))) {
8935 // An add of one will be selected as an INC.
8936 if (C->getAPIntValue() == 1) {
8937 Opcode = X86ISD::INC;
8942 // An add of negative one (subtract of one) will be selected as a DEC.
8943 if (C->getAPIntValue().isAllOnesValue()) {
8944 Opcode = X86ISD::DEC;
8950 // Otherwise use a regular EFLAGS-setting add.
8951 Opcode = X86ISD::ADD;
8955 // If the primary and result isn't used, don't bother using X86ISD::AND,
8956 // because a TEST instruction will be better.
8957 bool NonFlagUse = false;
8958 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
8959 UE = Op.getNode()->use_end(); UI != UE; ++UI) {
8961 unsigned UOpNo = UI.getOperandNo();
8962 if (User->getOpcode() == ISD::TRUNCATE && User->hasOneUse()) {
8963 // Look pass truncate.
8964 UOpNo = User->use_begin().getOperandNo();
8965 User = *User->use_begin();
8968 if (User->getOpcode() != ISD::BRCOND &&
8969 User->getOpcode() != ISD::SETCC &&
8970 !(User->getOpcode() == ISD::SELECT && UOpNo == 0)) {
8983 // Due to the ISEL shortcoming noted above, be conservative if this op is
8984 // likely to be selected as part of a load-modify-store instruction.
8985 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
8986 UE = Op.getNode()->use_end(); UI != UE; ++UI)
8987 if (UI->getOpcode() == ISD::STORE)
8990 // Otherwise use a regular EFLAGS-setting instruction.
8991 switch (ArithOp.getOpcode()) {
8992 default: llvm_unreachable("unexpected operator!");
8993 case ISD::SUB: Opcode = X86ISD::SUB; break;
8994 case ISD::XOR: Opcode = X86ISD::XOR; break;
8995 case ISD::AND: Opcode = X86ISD::AND; break;
8997 if (!NeedTruncation && (X86CC == X86::COND_E || X86CC == X86::COND_NE)) {
8998 SDValue EFLAGS = LowerVectorAllZeroTest(Op, DAG);
8999 if (EFLAGS.getNode())
9002 Opcode = X86ISD::OR;
9016 return SDValue(Op.getNode(), 1);
9022 // If we found that truncation is beneficial, perform the truncation and
9024 if (NeedTruncation) {
9025 EVT VT = Op.getValueType();
9026 SDValue WideVal = Op->getOperand(0);
9027 EVT WideVT = WideVal.getValueType();
9028 unsigned ConvertedOp = 0;
9029 // Use a target machine opcode to prevent further DAGCombine
9030 // optimizations that may separate the arithmetic operations
9031 // from the setcc node.
9032 switch (WideVal.getOpcode()) {
9034 case ISD::ADD: ConvertedOp = X86ISD::ADD; break;
9035 case ISD::SUB: ConvertedOp = X86ISD::SUB; break;
9036 case ISD::AND: ConvertedOp = X86ISD::AND; break;
9037 case ISD::OR: ConvertedOp = X86ISD::OR; break;
9038 case ISD::XOR: ConvertedOp = X86ISD::XOR; break;
9042 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
9043 if (TLI.isOperationLegal(WideVal.getOpcode(), WideVT)) {
9044 SDValue V0 = DAG.getNode(ISD::TRUNCATE, dl, VT, WideVal.getOperand(0));
9045 SDValue V1 = DAG.getNode(ISD::TRUNCATE, dl, VT, WideVal.getOperand(1));
9046 Op = DAG.getNode(ConvertedOp, dl, VT, V0, V1);
9052 // Emit a CMP with 0, which is the TEST pattern.
9053 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
9054 DAG.getConstant(0, Op.getValueType()));
9056 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32);
9057 SmallVector<SDValue, 4> Ops;
9058 for (unsigned i = 0; i != NumOperands; ++i)
9059 Ops.push_back(Op.getOperand(i));
9061 SDValue New = DAG.getNode(Opcode, dl, VTs, &Ops[0], NumOperands);
9062 DAG.ReplaceAllUsesWith(Op, New);
9063 return SDValue(New.getNode(), 1);
9066 /// Emit nodes that will be selected as "cmp Op0,Op1", or something
9068 SDValue X86TargetLowering::EmitCmp(SDValue Op0, SDValue Op1, unsigned X86CC,
9069 SelectionDAG &DAG) const {
9070 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op1))
9071 if (C->getAPIntValue() == 0)
9072 return EmitTest(Op0, X86CC, DAG);
9074 DebugLoc dl = Op0.getDebugLoc();
9075 if ((Op0.getValueType() == MVT::i8 || Op0.getValueType() == MVT::i16 ||
9076 Op0.getValueType() == MVT::i32 || Op0.getValueType() == MVT::i64)) {
9077 // Use SUB instead of CMP to enable CSE between SUB and CMP.
9078 SDVTList VTs = DAG.getVTList(Op0.getValueType(), MVT::i32);
9079 SDValue Sub = DAG.getNode(X86ISD::SUB, dl, VTs,
9081 return SDValue(Sub.getNode(), 1);
9083 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op0, Op1);
9086 /// Convert a comparison if required by the subtarget.
9087 SDValue X86TargetLowering::ConvertCmpIfNecessary(SDValue Cmp,
9088 SelectionDAG &DAG) const {
9089 // If the subtarget does not support the FUCOMI instruction, floating-point
9090 // comparisons have to be converted.
9091 if (Subtarget->hasCMov() ||
9092 Cmp.getOpcode() != X86ISD::CMP ||
9093 !Cmp.getOperand(0).getValueType().isFloatingPoint() ||
9094 !Cmp.getOperand(1).getValueType().isFloatingPoint())
9097 // The instruction selector will select an FUCOM instruction instead of
9098 // FUCOMI, which writes the comparison result to FPSW instead of EFLAGS. Hence
9099 // build an SDNode sequence that transfers the result from FPSW into EFLAGS:
9100 // (X86sahf (trunc (srl (X86fp_stsw (trunc (X86cmp ...)), 8))))
9101 DebugLoc dl = Cmp.getDebugLoc();
9102 SDValue TruncFPSW = DAG.getNode(ISD::TRUNCATE, dl, MVT::i16, Cmp);
9103 SDValue FNStSW = DAG.getNode(X86ISD::FNSTSW16r, dl, MVT::i16, TruncFPSW);
9104 SDValue Srl = DAG.getNode(ISD::SRL, dl, MVT::i16, FNStSW,
9105 DAG.getConstant(8, MVT::i8));
9106 SDValue TruncSrl = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Srl);
9107 return DAG.getNode(X86ISD::SAHF, dl, MVT::i32, TruncSrl);
9110 static bool isAllOnes(SDValue V) {
9111 ConstantSDNode *C = dyn_cast<ConstantSDNode>(V);
9112 return C && C->isAllOnesValue();
9115 /// LowerToBT - Result of 'and' is compared against zero. Turn it into a BT node
9116 /// if it's possible.
9117 SDValue X86TargetLowering::LowerToBT(SDValue And, ISD::CondCode CC,
9118 DebugLoc dl, SelectionDAG &DAG) const {
9119 SDValue Op0 = And.getOperand(0);
9120 SDValue Op1 = And.getOperand(1);
9121 if (Op0.getOpcode() == ISD::TRUNCATE)
9122 Op0 = Op0.getOperand(0);
9123 if (Op1.getOpcode() == ISD::TRUNCATE)
9124 Op1 = Op1.getOperand(0);
9127 if (Op1.getOpcode() == ISD::SHL)
9128 std::swap(Op0, Op1);
9129 if (Op0.getOpcode() == ISD::SHL) {
9130 if (ConstantSDNode *And00C = dyn_cast<ConstantSDNode>(Op0.getOperand(0)))
9131 if (And00C->getZExtValue() == 1) {
9132 // If we looked past a truncate, check that it's only truncating away
9134 unsigned BitWidth = Op0.getValueSizeInBits();
9135 unsigned AndBitWidth = And.getValueSizeInBits();
9136 if (BitWidth > AndBitWidth) {
9138 DAG.ComputeMaskedBits(Op0, Zeros, Ones);
9139 if (Zeros.countLeadingOnes() < BitWidth - AndBitWidth)
9143 RHS = Op0.getOperand(1);
9145 } else if (Op1.getOpcode() == ISD::Constant) {
9146 ConstantSDNode *AndRHS = cast<ConstantSDNode>(Op1);
9147 uint64_t AndRHSVal = AndRHS->getZExtValue();
9148 SDValue AndLHS = Op0;
9150 if (AndRHSVal == 1 && AndLHS.getOpcode() == ISD::SRL) {
9151 LHS = AndLHS.getOperand(0);
9152 RHS = AndLHS.getOperand(1);
9155 // Use BT if the immediate can't be encoded in a TEST instruction.
9156 if (!isUInt<32>(AndRHSVal) && isPowerOf2_64(AndRHSVal)) {
9158 RHS = DAG.getConstant(Log2_64_Ceil(AndRHSVal), LHS.getValueType());
9162 if (LHS.getNode()) {
9163 // If the LHS is of the form (x ^ -1) then replace the LHS with x and flip
9164 // the condition code later.
9165 bool Invert = false;
9166 if (LHS.getOpcode() == ISD::XOR && isAllOnes(LHS.getOperand(1))) {
9168 LHS = LHS.getOperand(0);
9171 // If LHS is i8, promote it to i32 with any_extend. There is no i8 BT
9172 // instruction. Since the shift amount is in-range-or-undefined, we know
9173 // that doing a bittest on the i32 value is ok. We extend to i32 because
9174 // the encoding for the i16 version is larger than the i32 version.
9175 // Also promote i16 to i32 for performance / code size reason.
9176 if (LHS.getValueType() == MVT::i8 ||
9177 LHS.getValueType() == MVT::i16)
9178 LHS = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, LHS);
9180 // If the operand types disagree, extend the shift amount to match. Since
9181 // BT ignores high bits (like shifts) we can use anyextend.
9182 if (LHS.getValueType() != RHS.getValueType())
9183 RHS = DAG.getNode(ISD::ANY_EXTEND, dl, LHS.getValueType(), RHS);
9185 SDValue BT = DAG.getNode(X86ISD::BT, dl, MVT::i32, LHS, RHS);
9186 X86::CondCode Cond = CC == ISD::SETEQ ? X86::COND_AE : X86::COND_B;
9187 // Flip the condition if the LHS was a not instruction
9189 Cond = X86::GetOppositeBranchCondition(Cond);
9190 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
9191 DAG.getConstant(Cond, MVT::i8), BT);
9197 // Lower256IntVSETCC - Break a VSETCC 256-bit integer VSETCC into two new 128
9198 // ones, and then concatenate the result back.
9199 static SDValue Lower256IntVSETCC(SDValue Op, SelectionDAG &DAG) {
9200 MVT VT = Op.getValueType().getSimpleVT();
9202 assert(VT.is256BitVector() && Op.getOpcode() == ISD::SETCC &&
9203 "Unsupported value type for operation");
9205 unsigned NumElems = VT.getVectorNumElements();
9206 DebugLoc dl = Op.getDebugLoc();
9207 SDValue CC = Op.getOperand(2);
9209 // Extract the LHS vectors
9210 SDValue LHS = Op.getOperand(0);
9211 SDValue LHS1 = Extract128BitVector(LHS, 0, DAG, dl);
9212 SDValue LHS2 = Extract128BitVector(LHS, NumElems/2, DAG, dl);
9214 // Extract the RHS vectors
9215 SDValue RHS = Op.getOperand(1);
9216 SDValue RHS1 = Extract128BitVector(RHS, 0, DAG, dl);
9217 SDValue RHS2 = Extract128BitVector(RHS, NumElems/2, DAG, dl);
9219 // Issue the operation on the smaller types and concatenate the result back
9220 MVT EltVT = VT.getVectorElementType();
9221 MVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
9222 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT,
9223 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, RHS1, CC),
9224 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, RHS2, CC));
9227 static SDValue LowerVSETCC(SDValue Op, const X86Subtarget *Subtarget,
9228 SelectionDAG &DAG) {
9230 SDValue Op0 = Op.getOperand(0);
9231 SDValue Op1 = Op.getOperand(1);
9232 SDValue CC = Op.getOperand(2);
9233 MVT VT = Op.getValueType().getSimpleVT();
9234 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
9235 bool isFP = Op.getOperand(1).getValueType().getSimpleVT().isFloatingPoint();
9236 DebugLoc dl = Op.getDebugLoc();
9240 MVT EltVT = Op0.getValueType().getVectorElementType().getSimpleVT();
9241 assert(EltVT == MVT::f32 || EltVT == MVT::f64);
9247 // SSE Condition code mapping:
9256 switch (SetCCOpcode) {
9257 default: llvm_unreachable("Unexpected SETCC condition");
9259 case ISD::SETEQ: SSECC = 0; break;
9261 case ISD::SETGT: Swap = true; // Fallthrough
9263 case ISD::SETOLT: SSECC = 1; break;
9265 case ISD::SETGE: Swap = true; // Fallthrough
9267 case ISD::SETOLE: SSECC = 2; break;
9268 case ISD::SETUO: SSECC = 3; break;
9270 case ISD::SETNE: SSECC = 4; break;
9271 case ISD::SETULE: Swap = true; // Fallthrough
9272 case ISD::SETUGE: SSECC = 5; break;
9273 case ISD::SETULT: Swap = true; // Fallthrough
9274 case ISD::SETUGT: SSECC = 6; break;
9275 case ISD::SETO: SSECC = 7; break;
9277 case ISD::SETONE: SSECC = 8; break;
9280 std::swap(Op0, Op1);
9282 // In the two special cases we can't handle, emit two comparisons.
9285 unsigned CombineOpc;
9286 if (SetCCOpcode == ISD::SETUEQ) {
9287 CC0 = 3; CC1 = 0; CombineOpc = ISD::OR;
9289 assert(SetCCOpcode == ISD::SETONE);
9290 CC0 = 7; CC1 = 4; CombineOpc = ISD::AND;
9293 SDValue Cmp0 = DAG.getNode(X86ISD::CMPP, dl, VT, Op0, Op1,
9294 DAG.getConstant(CC0, MVT::i8));
9295 SDValue Cmp1 = DAG.getNode(X86ISD::CMPP, dl, VT, Op0, Op1,
9296 DAG.getConstant(CC1, MVT::i8));
9297 return DAG.getNode(CombineOpc, dl, VT, Cmp0, Cmp1);
9299 // Handle all other FP comparisons here.
9300 return DAG.getNode(X86ISD::CMPP, dl, VT, Op0, Op1,
9301 DAG.getConstant(SSECC, MVT::i8));
9304 // Break 256-bit integer vector compare into smaller ones.
9305 if (VT.is256BitVector() && !Subtarget->hasInt256())
9306 return Lower256IntVSETCC(Op, DAG);
9308 // We are handling one of the integer comparisons here. Since SSE only has
9309 // GT and EQ comparisons for integer, swapping operands and multiple
9310 // operations may be required for some comparisons.
9312 bool Swap = false, Invert = false, FlipSigns = false;
9314 switch (SetCCOpcode) {
9315 default: llvm_unreachable("Unexpected SETCC condition");
9316 case ISD::SETNE: Invert = true;
9317 case ISD::SETEQ: Opc = X86ISD::PCMPEQ; break;
9318 case ISD::SETLT: Swap = true;
9319 case ISD::SETGT: Opc = X86ISD::PCMPGT; break;
9320 case ISD::SETGE: Swap = true;
9321 case ISD::SETLE: Opc = X86ISD::PCMPGT; Invert = true; break;
9322 case ISD::SETULT: Swap = true;
9323 case ISD::SETUGT: Opc = X86ISD::PCMPGT; FlipSigns = true; break;
9324 case ISD::SETUGE: Swap = true;
9325 case ISD::SETULE: Opc = X86ISD::PCMPGT; FlipSigns = true; Invert = true; break;
9328 std::swap(Op0, Op1);
9330 // Check that the operation in question is available (most are plain SSE2,
9331 // but PCMPGTQ and PCMPEQQ have different requirements).
9332 if (VT == MVT::v2i64) {
9333 if (Opc == X86ISD::PCMPGT && !Subtarget->hasSSE42())
9335 if (Opc == X86ISD::PCMPEQ && !Subtarget->hasSSE41()) {
9336 // If pcmpeqq is missing but pcmpeqd is available synthesize pcmpeqq with
9337 // pcmpeqd + pshufd + pand.
9338 assert(Subtarget->hasSSE2() && !FlipSigns && "Don't know how to lower!");
9340 // First cast everything to the right type,
9341 Op0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Op0);
9342 Op1 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Op1);
9345 SDValue Result = DAG.getNode(Opc, dl, MVT::v4i32, Op0, Op1);
9347 // Make sure the lower and upper halves are both all-ones.
9348 const int Mask[] = { 1, 0, 3, 2 };
9349 SDValue Shuf = DAG.getVectorShuffle(MVT::v4i32, dl, Result, Result, Mask);
9350 Result = DAG.getNode(ISD::AND, dl, MVT::v4i32, Result, Shuf);
9353 Result = DAG.getNOT(dl, Result, MVT::v4i32);
9355 return DAG.getNode(ISD::BITCAST, dl, VT, Result);
9359 // Since SSE has no unsigned integer comparisons, we need to flip the sign
9360 // bits of the inputs before performing those operations.
9362 EVT EltVT = VT.getVectorElementType();
9363 SDValue SignBit = DAG.getConstant(APInt::getSignBit(EltVT.getSizeInBits()),
9365 std::vector<SDValue> SignBits(VT.getVectorNumElements(), SignBit);
9366 SDValue SignVec = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &SignBits[0],
9368 Op0 = DAG.getNode(ISD::XOR, dl, VT, Op0, SignVec);
9369 Op1 = DAG.getNode(ISD::XOR, dl, VT, Op1, SignVec);
9372 SDValue Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
9374 // If the logical-not of the result is required, perform that now.
9376 Result = DAG.getNOT(dl, Result, VT);
9381 SDValue X86TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
9383 MVT VT = Op.getValueType().getSimpleVT();
9385 if (VT.isVector()) return LowerVSETCC(Op, Subtarget, DAG);
9387 assert(VT == MVT::i8 && "SetCC type must be 8-bit integer");
9388 SDValue Op0 = Op.getOperand(0);
9389 SDValue Op1 = Op.getOperand(1);
9390 DebugLoc dl = Op.getDebugLoc();
9391 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
9393 // Optimize to BT if possible.
9394 // Lower (X & (1 << N)) == 0 to BT(X, N).
9395 // Lower ((X >>u N) & 1) != 0 to BT(X, N).
9396 // Lower ((X >>s N) & 1) != 0 to BT(X, N).
9397 if (Op0.getOpcode() == ISD::AND && Op0.hasOneUse() &&
9398 Op1.getOpcode() == ISD::Constant &&
9399 cast<ConstantSDNode>(Op1)->isNullValue() &&
9400 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
9401 SDValue NewSetCC = LowerToBT(Op0, CC, dl, DAG);
9402 if (NewSetCC.getNode())
9406 // Look for X == 0, X == 1, X != 0, or X != 1. We can simplify some forms of
9408 if (Op1.getOpcode() == ISD::Constant &&
9409 (cast<ConstantSDNode>(Op1)->getZExtValue() == 1 ||
9410 cast<ConstantSDNode>(Op1)->isNullValue()) &&
9411 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
9413 // If the input is a setcc, then reuse the input setcc or use a new one with
9414 // the inverted condition.
9415 if (Op0.getOpcode() == X86ISD::SETCC) {
9416 X86::CondCode CCode = (X86::CondCode)Op0.getConstantOperandVal(0);
9417 bool Invert = (CC == ISD::SETNE) ^
9418 cast<ConstantSDNode>(Op1)->isNullValue();
9419 if (!Invert) return Op0;
9421 CCode = X86::GetOppositeBranchCondition(CCode);
9422 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
9423 DAG.getConstant(CCode, MVT::i8), Op0.getOperand(1));
9427 bool isFP = Op1.getValueType().getSimpleVT().isFloatingPoint();
9428 unsigned X86CC = TranslateX86CC(CC, isFP, Op0, Op1, DAG);
9429 if (X86CC == X86::COND_INVALID)
9432 SDValue EFLAGS = EmitCmp(Op0, Op1, X86CC, DAG);
9433 EFLAGS = ConvertCmpIfNecessary(EFLAGS, DAG);
9434 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
9435 DAG.getConstant(X86CC, MVT::i8), EFLAGS);
9438 // isX86LogicalCmp - Return true if opcode is a X86 logical comparison.
9439 static bool isX86LogicalCmp(SDValue Op) {
9440 unsigned Opc = Op.getNode()->getOpcode();
9441 if (Opc == X86ISD::CMP || Opc == X86ISD::COMI || Opc == X86ISD::UCOMI ||
9442 Opc == X86ISD::SAHF)
9444 if (Op.getResNo() == 1 &&
9445 (Opc == X86ISD::ADD ||
9446 Opc == X86ISD::SUB ||
9447 Opc == X86ISD::ADC ||
9448 Opc == X86ISD::SBB ||
9449 Opc == X86ISD::SMUL ||
9450 Opc == X86ISD::UMUL ||
9451 Opc == X86ISD::INC ||
9452 Opc == X86ISD::DEC ||
9453 Opc == X86ISD::OR ||
9454 Opc == X86ISD::XOR ||
9455 Opc == X86ISD::AND))
9458 if (Op.getResNo() == 2 && Opc == X86ISD::UMUL)
9464 static bool isZero(SDValue V) {
9465 ConstantSDNode *C = dyn_cast<ConstantSDNode>(V);
9466 return C && C->isNullValue();
9469 static bool isTruncWithZeroHighBitsInput(SDValue V, SelectionDAG &DAG) {
9470 if (V.getOpcode() != ISD::TRUNCATE)
9473 SDValue VOp0 = V.getOperand(0);
9474 unsigned InBits = VOp0.getValueSizeInBits();
9475 unsigned Bits = V.getValueSizeInBits();
9476 return DAG.MaskedValueIsZero(VOp0, APInt::getHighBitsSet(InBits,InBits-Bits));
9479 SDValue X86TargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
9480 bool addTest = true;
9481 SDValue Cond = Op.getOperand(0);
9482 SDValue Op1 = Op.getOperand(1);
9483 SDValue Op2 = Op.getOperand(2);
9484 DebugLoc DL = Op.getDebugLoc();
9487 if (Cond.getOpcode() == ISD::SETCC) {
9488 SDValue NewCond = LowerSETCC(Cond, DAG);
9489 if (NewCond.getNode())
9493 // (select (x == 0), -1, y) -> (sign_bit (x - 1)) | y
9494 // (select (x == 0), y, -1) -> ~(sign_bit (x - 1)) | y
9495 // (select (x != 0), y, -1) -> (sign_bit (x - 1)) | y
9496 // (select (x != 0), -1, y) -> ~(sign_bit (x - 1)) | y
9497 if (Cond.getOpcode() == X86ISD::SETCC &&
9498 Cond.getOperand(1).getOpcode() == X86ISD::CMP &&
9499 isZero(Cond.getOperand(1).getOperand(1))) {
9500 SDValue Cmp = Cond.getOperand(1);
9502 unsigned CondCode =cast<ConstantSDNode>(Cond.getOperand(0))->getZExtValue();
9504 if ((isAllOnes(Op1) || isAllOnes(Op2)) &&
9505 (CondCode == X86::COND_E || CondCode == X86::COND_NE)) {
9506 SDValue Y = isAllOnes(Op2) ? Op1 : Op2;
9508 SDValue CmpOp0 = Cmp.getOperand(0);
9509 // Apply further optimizations for special cases
9510 // (select (x != 0), -1, 0) -> neg & sbb
9511 // (select (x == 0), 0, -1) -> neg & sbb
9512 if (ConstantSDNode *YC = dyn_cast<ConstantSDNode>(Y))
9513 if (YC->isNullValue() &&
9514 (isAllOnes(Op1) == (CondCode == X86::COND_NE))) {
9515 SDVTList VTs = DAG.getVTList(CmpOp0.getValueType(), MVT::i32);
9516 SDValue Neg = DAG.getNode(X86ISD::SUB, DL, VTs,
9517 DAG.getConstant(0, CmpOp0.getValueType()),
9519 SDValue Res = DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
9520 DAG.getConstant(X86::COND_B, MVT::i8),
9521 SDValue(Neg.getNode(), 1));
9525 Cmp = DAG.getNode(X86ISD::CMP, DL, MVT::i32,
9526 CmpOp0, DAG.getConstant(1, CmpOp0.getValueType()));
9527 Cmp = ConvertCmpIfNecessary(Cmp, DAG);
9529 SDValue Res = // Res = 0 or -1.
9530 DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
9531 DAG.getConstant(X86::COND_B, MVT::i8), Cmp);
9533 if (isAllOnes(Op1) != (CondCode == X86::COND_E))
9534 Res = DAG.getNOT(DL, Res, Res.getValueType());
9536 ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(Op2);
9537 if (N2C == 0 || !N2C->isNullValue())
9538 Res = DAG.getNode(ISD::OR, DL, Res.getValueType(), Res, Y);
9543 // Look past (and (setcc_carry (cmp ...)), 1).
9544 if (Cond.getOpcode() == ISD::AND &&
9545 Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) {
9546 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Cond.getOperand(1));
9547 if (C && C->getAPIntValue() == 1)
9548 Cond = Cond.getOperand(0);
9551 // If condition flag is set by a X86ISD::CMP, then use it as the condition
9552 // setting operand in place of the X86ISD::SETCC.
9553 unsigned CondOpcode = Cond.getOpcode();
9554 if (CondOpcode == X86ISD::SETCC ||
9555 CondOpcode == X86ISD::SETCC_CARRY) {
9556 CC = Cond.getOperand(0);
9558 SDValue Cmp = Cond.getOperand(1);
9559 unsigned Opc = Cmp.getOpcode();
9560 MVT VT = Op.getValueType().getSimpleVT();
9562 bool IllegalFPCMov = false;
9563 if (VT.isFloatingPoint() && !VT.isVector() &&
9564 !isScalarFPTypeInSSEReg(VT)) // FPStack?
9565 IllegalFPCMov = !hasFPCMov(cast<ConstantSDNode>(CC)->getSExtValue());
9567 if ((isX86LogicalCmp(Cmp) && !IllegalFPCMov) ||
9568 Opc == X86ISD::BT) { // FIXME
9572 } else if (CondOpcode == ISD::USUBO || CondOpcode == ISD::SSUBO ||
9573 CondOpcode == ISD::UADDO || CondOpcode == ISD::SADDO ||
9574 ((CondOpcode == ISD::UMULO || CondOpcode == ISD::SMULO) &&
9575 Cond.getOperand(0).getValueType() != MVT::i8)) {
9576 SDValue LHS = Cond.getOperand(0);
9577 SDValue RHS = Cond.getOperand(1);
9581 switch (CondOpcode) {
9582 case ISD::UADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_B; break;
9583 case ISD::SADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_O; break;
9584 case ISD::USUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_B; break;
9585 case ISD::SSUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_O; break;
9586 case ISD::UMULO: X86Opcode = X86ISD::UMUL; X86Cond = X86::COND_O; break;
9587 case ISD::SMULO: X86Opcode = X86ISD::SMUL; X86Cond = X86::COND_O; break;
9588 default: llvm_unreachable("unexpected overflowing operator");
9590 if (CondOpcode == ISD::UMULO)
9591 VTs = DAG.getVTList(LHS.getValueType(), LHS.getValueType(),
9594 VTs = DAG.getVTList(LHS.getValueType(), MVT::i32);
9596 SDValue X86Op = DAG.getNode(X86Opcode, DL, VTs, LHS, RHS);
9598 if (CondOpcode == ISD::UMULO)
9599 Cond = X86Op.getValue(2);
9601 Cond = X86Op.getValue(1);
9603 CC = DAG.getConstant(X86Cond, MVT::i8);
9608 // Look pass the truncate if the high bits are known zero.
9609 if (isTruncWithZeroHighBitsInput(Cond, DAG))
9610 Cond = Cond.getOperand(0);
9612 // We know the result of AND is compared against zero. Try to match
9614 if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) {
9615 SDValue NewSetCC = LowerToBT(Cond, ISD::SETNE, DL, DAG);
9616 if (NewSetCC.getNode()) {
9617 CC = NewSetCC.getOperand(0);
9618 Cond = NewSetCC.getOperand(1);
9625 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
9626 Cond = EmitTest(Cond, X86::COND_NE, DAG);
9629 // a < b ? -1 : 0 -> RES = ~setcc_carry
9630 // a < b ? 0 : -1 -> RES = setcc_carry
9631 // a >= b ? -1 : 0 -> RES = setcc_carry
9632 // a >= b ? 0 : -1 -> RES = ~setcc_carry
9633 if (Cond.getOpcode() == X86ISD::SUB) {
9634 Cond = ConvertCmpIfNecessary(Cond, DAG);
9635 unsigned CondCode = cast<ConstantSDNode>(CC)->getZExtValue();
9637 if ((CondCode == X86::COND_AE || CondCode == X86::COND_B) &&
9638 (isAllOnes(Op1) || isAllOnes(Op2)) && (isZero(Op1) || isZero(Op2))) {
9639 SDValue Res = DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
9640 DAG.getConstant(X86::COND_B, MVT::i8), Cond);
9641 if (isAllOnes(Op1) != (CondCode == X86::COND_B))
9642 return DAG.getNOT(DL, Res, Res.getValueType());
9647 // X86 doesn't have an i8 cmov. If both operands are the result of a truncate
9648 // widen the cmov and push the truncate through. This avoids introducing a new
9649 // branch during isel and doesn't add any extensions.
9650 if (Op.getValueType() == MVT::i8 &&
9651 Op1.getOpcode() == ISD::TRUNCATE && Op2.getOpcode() == ISD::TRUNCATE) {
9652 SDValue T1 = Op1.getOperand(0), T2 = Op2.getOperand(0);
9653 if (T1.getValueType() == T2.getValueType() &&
9654 // Blacklist CopyFromReg to avoid partial register stalls.
9655 T1.getOpcode() != ISD::CopyFromReg && T2.getOpcode()!=ISD::CopyFromReg){
9656 SDVTList VTs = DAG.getVTList(T1.getValueType(), MVT::Glue);
9657 SDValue Cmov = DAG.getNode(X86ISD::CMOV, DL, VTs, T2, T1, CC, Cond);
9658 return DAG.getNode(ISD::TRUNCATE, DL, Op.getValueType(), Cmov);
9662 // X86ISD::CMOV means set the result (which is operand 1) to the RHS if
9663 // condition is true.
9664 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::Glue);
9665 SDValue Ops[] = { Op2, Op1, CC, Cond };
9666 return DAG.getNode(X86ISD::CMOV, DL, VTs, Ops, array_lengthof(Ops));
9669 SDValue X86TargetLowering::LowerSIGN_EXTEND(SDValue Op,
9670 SelectionDAG &DAG) const {
9671 MVT VT = Op->getValueType(0).getSimpleVT();
9672 SDValue In = Op->getOperand(0);
9673 MVT InVT = In.getValueType().getSimpleVT();
9674 DebugLoc dl = Op->getDebugLoc();
9676 if ((VT != MVT::v4i64 || InVT != MVT::v4i32) &&
9677 (VT != MVT::v8i32 || InVT != MVT::v8i16))
9680 if (Subtarget->hasInt256())
9681 return DAG.getNode(X86ISD::VSEXT_MOVL, dl, VT, In);
9683 // Optimize vectors in AVX mode
9684 // Sign extend v8i16 to v8i32 and
9687 // Divide input vector into two parts
9688 // for v4i32 the shuffle mask will be { 0, 1, -1, -1} {2, 3, -1, -1}
9689 // use vpmovsx instruction to extend v4i32 -> v2i64; v8i16 -> v4i32
9690 // concat the vectors to original VT
9692 unsigned NumElems = InVT.getVectorNumElements();
9693 SDValue Undef = DAG.getUNDEF(InVT);
9695 SmallVector<int,8> ShufMask1(NumElems, -1);
9696 for (unsigned i = 0; i != NumElems/2; ++i)
9699 SDValue OpLo = DAG.getVectorShuffle(InVT, dl, In, Undef, &ShufMask1[0]);
9701 SmallVector<int,8> ShufMask2(NumElems, -1);
9702 for (unsigned i = 0; i != NumElems/2; ++i)
9703 ShufMask2[i] = i + NumElems/2;
9705 SDValue OpHi = DAG.getVectorShuffle(InVT, dl, In, Undef, &ShufMask2[0]);
9707 MVT HalfVT = MVT::getVectorVT(VT.getScalarType(),
9708 VT.getVectorNumElements()/2);
9710 OpLo = DAG.getNode(X86ISD::VSEXT_MOVL, dl, HalfVT, OpLo);
9711 OpHi = DAG.getNode(X86ISD::VSEXT_MOVL, dl, HalfVT, OpHi);
9713 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, OpLo, OpHi);
9716 // isAndOrOfSingleUseSetCCs - Return true if node is an ISD::AND or
9717 // ISD::OR of two X86ISD::SETCC nodes each of which has no other use apart
9718 // from the AND / OR.
9719 static bool isAndOrOfSetCCs(SDValue Op, unsigned &Opc) {
9720 Opc = Op.getOpcode();
9721 if (Opc != ISD::OR && Opc != ISD::AND)
9723 return (Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
9724 Op.getOperand(0).hasOneUse() &&
9725 Op.getOperand(1).getOpcode() == X86ISD::SETCC &&
9726 Op.getOperand(1).hasOneUse());
9729 // isXor1OfSetCC - Return true if node is an ISD::XOR of a X86ISD::SETCC and
9730 // 1 and that the SETCC node has a single use.
9731 static bool isXor1OfSetCC(SDValue Op) {
9732 if (Op.getOpcode() != ISD::XOR)
9734 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(Op.getOperand(1));
9735 if (N1C && N1C->getAPIntValue() == 1) {
9736 return Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
9737 Op.getOperand(0).hasOneUse();
9742 SDValue X86TargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) const {
9743 bool addTest = true;
9744 SDValue Chain = Op.getOperand(0);
9745 SDValue Cond = Op.getOperand(1);
9746 SDValue Dest = Op.getOperand(2);
9747 DebugLoc dl = Op.getDebugLoc();
9749 bool Inverted = false;
9751 if (Cond.getOpcode() == ISD::SETCC) {
9752 // Check for setcc([su]{add,sub,mul}o == 0).
9753 if (cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETEQ &&
9754 isa<ConstantSDNode>(Cond.getOperand(1)) &&
9755 cast<ConstantSDNode>(Cond.getOperand(1))->isNullValue() &&
9756 Cond.getOperand(0).getResNo() == 1 &&
9757 (Cond.getOperand(0).getOpcode() == ISD::SADDO ||
9758 Cond.getOperand(0).getOpcode() == ISD::UADDO ||
9759 Cond.getOperand(0).getOpcode() == ISD::SSUBO ||
9760 Cond.getOperand(0).getOpcode() == ISD::USUBO ||
9761 Cond.getOperand(0).getOpcode() == ISD::SMULO ||
9762 Cond.getOperand(0).getOpcode() == ISD::UMULO)) {
9764 Cond = Cond.getOperand(0);
9766 SDValue NewCond = LowerSETCC(Cond, DAG);
9767 if (NewCond.getNode())
9772 // FIXME: LowerXALUO doesn't handle these!!
9773 else if (Cond.getOpcode() == X86ISD::ADD ||
9774 Cond.getOpcode() == X86ISD::SUB ||
9775 Cond.getOpcode() == X86ISD::SMUL ||
9776 Cond.getOpcode() == X86ISD::UMUL)
9777 Cond = LowerXALUO(Cond, DAG);
9780 // Look pass (and (setcc_carry (cmp ...)), 1).
9781 if (Cond.getOpcode() == ISD::AND &&
9782 Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) {
9783 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Cond.getOperand(1));
9784 if (C && C->getAPIntValue() == 1)
9785 Cond = Cond.getOperand(0);
9788 // If condition flag is set by a X86ISD::CMP, then use it as the condition
9789 // setting operand in place of the X86ISD::SETCC.
9790 unsigned CondOpcode = Cond.getOpcode();
9791 if (CondOpcode == X86ISD::SETCC ||
9792 CondOpcode == X86ISD::SETCC_CARRY) {
9793 CC = Cond.getOperand(0);
9795 SDValue Cmp = Cond.getOperand(1);
9796 unsigned Opc = Cmp.getOpcode();
9797 // FIXME: WHY THE SPECIAL CASING OF LogicalCmp??
9798 if (isX86LogicalCmp(Cmp) || Opc == X86ISD::BT) {
9802 switch (cast<ConstantSDNode>(CC)->getZExtValue()) {
9806 // These can only come from an arithmetic instruction with overflow,
9807 // e.g. SADDO, UADDO.
9808 Cond = Cond.getNode()->getOperand(1);
9814 CondOpcode = Cond.getOpcode();
9815 if (CondOpcode == ISD::UADDO || CondOpcode == ISD::SADDO ||
9816 CondOpcode == ISD::USUBO || CondOpcode == ISD::SSUBO ||
9817 ((CondOpcode == ISD::UMULO || CondOpcode == ISD::SMULO) &&
9818 Cond.getOperand(0).getValueType() != MVT::i8)) {
9819 SDValue LHS = Cond.getOperand(0);
9820 SDValue RHS = Cond.getOperand(1);
9824 switch (CondOpcode) {
9825 case ISD::UADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_B; break;
9826 case ISD::SADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_O; break;
9827 case ISD::USUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_B; break;
9828 case ISD::SSUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_O; break;
9829 case ISD::UMULO: X86Opcode = X86ISD::UMUL; X86Cond = X86::COND_O; break;
9830 case ISD::SMULO: X86Opcode = X86ISD::SMUL; X86Cond = X86::COND_O; break;
9831 default: llvm_unreachable("unexpected overflowing operator");
9834 X86Cond = X86::GetOppositeBranchCondition((X86::CondCode)X86Cond);
9835 if (CondOpcode == ISD::UMULO)
9836 VTs = DAG.getVTList(LHS.getValueType(), LHS.getValueType(),
9839 VTs = DAG.getVTList(LHS.getValueType(), MVT::i32);
9841 SDValue X86Op = DAG.getNode(X86Opcode, dl, VTs, LHS, RHS);
9843 if (CondOpcode == ISD::UMULO)
9844 Cond = X86Op.getValue(2);
9846 Cond = X86Op.getValue(1);
9848 CC = DAG.getConstant(X86Cond, MVT::i8);
9852 if (Cond.hasOneUse() && isAndOrOfSetCCs(Cond, CondOpc)) {
9853 SDValue Cmp = Cond.getOperand(0).getOperand(1);
9854 if (CondOpc == ISD::OR) {
9855 // Also, recognize the pattern generated by an FCMP_UNE. We can emit
9856 // two branches instead of an explicit OR instruction with a
9858 if (Cmp == Cond.getOperand(1).getOperand(1) &&
9859 isX86LogicalCmp(Cmp)) {
9860 CC = Cond.getOperand(0).getOperand(0);
9861 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
9862 Chain, Dest, CC, Cmp);
9863 CC = Cond.getOperand(1).getOperand(0);
9867 } else { // ISD::AND
9868 // Also, recognize the pattern generated by an FCMP_OEQ. We can emit
9869 // two branches instead of an explicit AND instruction with a
9870 // separate test. However, we only do this if this block doesn't
9871 // have a fall-through edge, because this requires an explicit
9872 // jmp when the condition is false.
9873 if (Cmp == Cond.getOperand(1).getOperand(1) &&
9874 isX86LogicalCmp(Cmp) &&
9875 Op.getNode()->hasOneUse()) {
9876 X86::CondCode CCode =
9877 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
9878 CCode = X86::GetOppositeBranchCondition(CCode);
9879 CC = DAG.getConstant(CCode, MVT::i8);
9880 SDNode *User = *Op.getNode()->use_begin();
9881 // Look for an unconditional branch following this conditional branch.
9882 // We need this because we need to reverse the successors in order
9883 // to implement FCMP_OEQ.
9884 if (User->getOpcode() == ISD::BR) {
9885 SDValue FalseBB = User->getOperand(1);
9887 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
9888 assert(NewBR == User);
9892 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
9893 Chain, Dest, CC, Cmp);
9894 X86::CondCode CCode =
9895 (X86::CondCode)Cond.getOperand(1).getConstantOperandVal(0);
9896 CCode = X86::GetOppositeBranchCondition(CCode);
9897 CC = DAG.getConstant(CCode, MVT::i8);
9903 } else if (Cond.hasOneUse() && isXor1OfSetCC(Cond)) {
9904 // Recognize for xorb (setcc), 1 patterns. The xor inverts the condition.
9905 // It should be transformed during dag combiner except when the condition
9906 // is set by a arithmetics with overflow node.
9907 X86::CondCode CCode =
9908 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
9909 CCode = X86::GetOppositeBranchCondition(CCode);
9910 CC = DAG.getConstant(CCode, MVT::i8);
9911 Cond = Cond.getOperand(0).getOperand(1);
9913 } else if (Cond.getOpcode() == ISD::SETCC &&
9914 cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETOEQ) {
9915 // For FCMP_OEQ, we can emit
9916 // two branches instead of an explicit AND instruction with a
9917 // separate test. However, we only do this if this block doesn't
9918 // have a fall-through edge, because this requires an explicit
9919 // jmp when the condition is false.
9920 if (Op.getNode()->hasOneUse()) {
9921 SDNode *User = *Op.getNode()->use_begin();
9922 // Look for an unconditional branch following this conditional branch.
9923 // We need this because we need to reverse the successors in order
9924 // to implement FCMP_OEQ.
9925 if (User->getOpcode() == ISD::BR) {
9926 SDValue FalseBB = User->getOperand(1);
9928 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
9929 assert(NewBR == User);
9933 SDValue Cmp = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
9934 Cond.getOperand(0), Cond.getOperand(1));
9935 Cmp = ConvertCmpIfNecessary(Cmp, DAG);
9936 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
9937 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
9938 Chain, Dest, CC, Cmp);
9939 CC = DAG.getConstant(X86::COND_P, MVT::i8);
9944 } else if (Cond.getOpcode() == ISD::SETCC &&
9945 cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETUNE) {
9946 // For FCMP_UNE, we can emit
9947 // two branches instead of an explicit AND instruction with a
9948 // separate test. However, we only do this if this block doesn't
9949 // have a fall-through edge, because this requires an explicit
9950 // jmp when the condition is false.
9951 if (Op.getNode()->hasOneUse()) {
9952 SDNode *User = *Op.getNode()->use_begin();
9953 // Look for an unconditional branch following this conditional branch.
9954 // We need this because we need to reverse the successors in order
9955 // to implement FCMP_UNE.
9956 if (User->getOpcode() == ISD::BR) {
9957 SDValue FalseBB = User->getOperand(1);
9959 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
9960 assert(NewBR == User);
9963 SDValue Cmp = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
9964 Cond.getOperand(0), Cond.getOperand(1));
9965 Cmp = ConvertCmpIfNecessary(Cmp, DAG);
9966 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
9967 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
9968 Chain, Dest, CC, Cmp);
9969 CC = DAG.getConstant(X86::COND_NP, MVT::i8);
9979 // Look pass the truncate if the high bits are known zero.
9980 if (isTruncWithZeroHighBitsInput(Cond, DAG))
9981 Cond = Cond.getOperand(0);
9983 // We know the result of AND is compared against zero. Try to match
9985 if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) {
9986 SDValue NewSetCC = LowerToBT(Cond, ISD::SETNE, dl, DAG);
9987 if (NewSetCC.getNode()) {
9988 CC = NewSetCC.getOperand(0);
9989 Cond = NewSetCC.getOperand(1);
9996 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
9997 Cond = EmitTest(Cond, X86::COND_NE, DAG);
9999 Cond = ConvertCmpIfNecessary(Cond, DAG);
10000 return DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
10001 Chain, Dest, CC, Cond);
10004 // Lower dynamic stack allocation to _alloca call for Cygwin/Mingw targets.
10005 // Calls to _alloca is needed to probe the stack when allocating more than 4k
10006 // bytes in one go. Touching the stack at 4K increments is necessary to ensure
10007 // that the guard pages used by the OS virtual memory manager are allocated in
10008 // correct sequence.
10010 X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
10011 SelectionDAG &DAG) const {
10012 assert((Subtarget->isTargetCygMing() || Subtarget->isTargetWindows() ||
10013 getTargetMachine().Options.EnableSegmentedStacks) &&
10014 "This should be used only on Windows targets or when segmented stacks "
10016 assert(!Subtarget->isTargetEnvMacho() && "Not implemented");
10017 DebugLoc dl = Op.getDebugLoc();
10020 SDValue Chain = Op.getOperand(0);
10021 SDValue Size = Op.getOperand(1);
10022 // FIXME: Ensure alignment here
10024 bool Is64Bit = Subtarget->is64Bit();
10025 EVT SPTy = Is64Bit ? MVT::i64 : MVT::i32;
10027 if (getTargetMachine().Options.EnableSegmentedStacks) {
10028 MachineFunction &MF = DAG.getMachineFunction();
10029 MachineRegisterInfo &MRI = MF.getRegInfo();
10032 // The 64 bit implementation of segmented stacks needs to clobber both r10
10033 // r11. This makes it impossible to use it along with nested parameters.
10034 const Function *F = MF.getFunction();
10036 for (Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
10038 if (I->hasNestAttr())
10039 report_fatal_error("Cannot use segmented stacks with functions that "
10040 "have nested arguments.");
10043 const TargetRegisterClass *AddrRegClass =
10044 getRegClassFor(Subtarget->is64Bit() ? MVT::i64:MVT::i32);
10045 unsigned Vreg = MRI.createVirtualRegister(AddrRegClass);
10046 Chain = DAG.getCopyToReg(Chain, dl, Vreg, Size);
10047 SDValue Value = DAG.getNode(X86ISD::SEG_ALLOCA, dl, SPTy, Chain,
10048 DAG.getRegister(Vreg, SPTy));
10049 SDValue Ops1[2] = { Value, Chain };
10050 return DAG.getMergeValues(Ops1, 2, dl);
10053 unsigned Reg = (Subtarget->is64Bit() ? X86::RAX : X86::EAX);
10055 Chain = DAG.getCopyToReg(Chain, dl, Reg, Size, Flag);
10056 Flag = Chain.getValue(1);
10057 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
10059 Chain = DAG.getNode(X86ISD::WIN_ALLOCA, dl, NodeTys, Chain, Flag);
10060 Flag = Chain.getValue(1);
10062 Chain = DAG.getCopyFromReg(Chain, dl, RegInfo->getStackRegister(),
10065 SDValue Ops1[2] = { Chain.getValue(0), Chain };
10066 return DAG.getMergeValues(Ops1, 2, dl);
10070 SDValue X86TargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const {
10071 MachineFunction &MF = DAG.getMachineFunction();
10072 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
10074 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
10075 DebugLoc DL = Op.getDebugLoc();
10077 if (!Subtarget->is64Bit() || Subtarget->isTargetWin64()) {
10078 // vastart just stores the address of the VarArgsFrameIndex slot into the
10079 // memory location argument.
10080 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
10082 return DAG.getStore(Op.getOperand(0), DL, FR, Op.getOperand(1),
10083 MachinePointerInfo(SV), false, false, 0);
10087 // gp_offset (0 - 6 * 8)
10088 // fp_offset (48 - 48 + 8 * 16)
10089 // overflow_arg_area (point to parameters coming in memory).
10091 SmallVector<SDValue, 8> MemOps;
10092 SDValue FIN = Op.getOperand(1);
10094 SDValue Store = DAG.getStore(Op.getOperand(0), DL,
10095 DAG.getConstant(FuncInfo->getVarArgsGPOffset(),
10097 FIN, MachinePointerInfo(SV), false, false, 0);
10098 MemOps.push_back(Store);
10101 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
10102 FIN, DAG.getIntPtrConstant(4));
10103 Store = DAG.getStore(Op.getOperand(0), DL,
10104 DAG.getConstant(FuncInfo->getVarArgsFPOffset(),
10106 FIN, MachinePointerInfo(SV, 4), false, false, 0);
10107 MemOps.push_back(Store);
10109 // Store ptr to overflow_arg_area
10110 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
10111 FIN, DAG.getIntPtrConstant(4));
10112 SDValue OVFIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
10114 Store = DAG.getStore(Op.getOperand(0), DL, OVFIN, FIN,
10115 MachinePointerInfo(SV, 8),
10117 MemOps.push_back(Store);
10119 // Store ptr to reg_save_area.
10120 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
10121 FIN, DAG.getIntPtrConstant(8));
10122 SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(),
10124 Store = DAG.getStore(Op.getOperand(0), DL, RSFIN, FIN,
10125 MachinePointerInfo(SV, 16), false, false, 0);
10126 MemOps.push_back(Store);
10127 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
10128 &MemOps[0], MemOps.size());
10131 SDValue X86TargetLowering::LowerVAARG(SDValue Op, SelectionDAG &DAG) const {
10132 assert(Subtarget->is64Bit() &&
10133 "LowerVAARG only handles 64-bit va_arg!");
10134 assert((Subtarget->isTargetLinux() ||
10135 Subtarget->isTargetDarwin()) &&
10136 "Unhandled target in LowerVAARG");
10137 assert(Op.getNode()->getNumOperands() == 4);
10138 SDValue Chain = Op.getOperand(0);
10139 SDValue SrcPtr = Op.getOperand(1);
10140 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
10141 unsigned Align = Op.getConstantOperandVal(3);
10142 DebugLoc dl = Op.getDebugLoc();
10144 EVT ArgVT = Op.getNode()->getValueType(0);
10145 Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
10146 uint32_t ArgSize = getDataLayout()->getTypeAllocSize(ArgTy);
10149 // Decide which area this value should be read from.
10150 // TODO: Implement the AMD64 ABI in its entirety. This simple
10151 // selection mechanism works only for the basic types.
10152 if (ArgVT == MVT::f80) {
10153 llvm_unreachable("va_arg for f80 not yet implemented");
10154 } else if (ArgVT.isFloatingPoint() && ArgSize <= 16 /*bytes*/) {
10155 ArgMode = 2; // Argument passed in XMM register. Use fp_offset.
10156 } else if (ArgVT.isInteger() && ArgSize <= 32 /*bytes*/) {
10157 ArgMode = 1; // Argument passed in GPR64 register(s). Use gp_offset.
10159 llvm_unreachable("Unhandled argument type in LowerVAARG");
10162 if (ArgMode == 2) {
10163 // Sanity Check: Make sure using fp_offset makes sense.
10164 assert(!getTargetMachine().Options.UseSoftFloat &&
10165 !(DAG.getMachineFunction()
10166 .getFunction()->getAttributes()
10167 .hasAttribute(AttributeSet::FunctionIndex,
10168 Attribute::NoImplicitFloat)) &&
10169 Subtarget->hasSSE1());
10172 // Insert VAARG_64 node into the DAG
10173 // VAARG_64 returns two values: Variable Argument Address, Chain
10174 SmallVector<SDValue, 11> InstOps;
10175 InstOps.push_back(Chain);
10176 InstOps.push_back(SrcPtr);
10177 InstOps.push_back(DAG.getConstant(ArgSize, MVT::i32));
10178 InstOps.push_back(DAG.getConstant(ArgMode, MVT::i8));
10179 InstOps.push_back(DAG.getConstant(Align, MVT::i32));
10180 SDVTList VTs = DAG.getVTList(getPointerTy(), MVT::Other);
10181 SDValue VAARG = DAG.getMemIntrinsicNode(X86ISD::VAARG_64, dl,
10182 VTs, &InstOps[0], InstOps.size(),
10184 MachinePointerInfo(SV),
10186 /*Volatile=*/false,
10188 /*WriteMem=*/true);
10189 Chain = VAARG.getValue(1);
10191 // Load the next argument and return it
10192 return DAG.getLoad(ArgVT, dl,
10195 MachinePointerInfo(),
10196 false, false, false, 0);
10199 static SDValue LowerVACOPY(SDValue Op, const X86Subtarget *Subtarget,
10200 SelectionDAG &DAG) {
10201 // X86-64 va_list is a struct { i32, i32, i8*, i8* }.
10202 assert(Subtarget->is64Bit() && "This code only handles 64-bit va_copy!");
10203 SDValue Chain = Op.getOperand(0);
10204 SDValue DstPtr = Op.getOperand(1);
10205 SDValue SrcPtr = Op.getOperand(2);
10206 const Value *DstSV = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
10207 const Value *SrcSV = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
10208 DebugLoc DL = Op.getDebugLoc();
10210 return DAG.getMemcpy(Chain, DL, DstPtr, SrcPtr,
10211 DAG.getIntPtrConstant(24), 8, /*isVolatile*/false,
10213 MachinePointerInfo(DstSV), MachinePointerInfo(SrcSV));
10216 // getTargetVShiftNode - Handle vector element shifts where the shift amount
10217 // may or may not be a constant. Takes immediate version of shift as input.
10218 static SDValue getTargetVShiftNode(unsigned Opc, DebugLoc dl, EVT VT,
10219 SDValue SrcOp, SDValue ShAmt,
10220 SelectionDAG &DAG) {
10221 assert(ShAmt.getValueType() == MVT::i32 && "ShAmt is not i32");
10223 if (isa<ConstantSDNode>(ShAmt)) {
10224 // Constant may be a TargetConstant. Use a regular constant.
10225 uint32_t ShiftAmt = cast<ConstantSDNode>(ShAmt)->getZExtValue();
10227 default: llvm_unreachable("Unknown target vector shift node");
10228 case X86ISD::VSHLI:
10229 case X86ISD::VSRLI:
10230 case X86ISD::VSRAI:
10231 return DAG.getNode(Opc, dl, VT, SrcOp,
10232 DAG.getConstant(ShiftAmt, MVT::i32));
10236 // Change opcode to non-immediate version
10238 default: llvm_unreachable("Unknown target vector shift node");
10239 case X86ISD::VSHLI: Opc = X86ISD::VSHL; break;
10240 case X86ISD::VSRLI: Opc = X86ISD::VSRL; break;
10241 case X86ISD::VSRAI: Opc = X86ISD::VSRA; break;
10244 // Need to build a vector containing shift amount
10245 // Shift amount is 32-bits, but SSE instructions read 64-bit, so fill with 0
10248 ShOps[1] = DAG.getConstant(0, MVT::i32);
10249 ShOps[2] = ShOps[3] = DAG.getUNDEF(MVT::i32);
10250 ShAmt = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, &ShOps[0], 4);
10252 // The return type has to be a 128-bit type with the same element
10253 // type as the input type.
10254 MVT EltVT = VT.getVectorElementType().getSimpleVT();
10255 EVT ShVT = MVT::getVectorVT(EltVT, 128/EltVT.getSizeInBits());
10257 ShAmt = DAG.getNode(ISD::BITCAST, dl, ShVT, ShAmt);
10258 return DAG.getNode(Opc, dl, VT, SrcOp, ShAmt);
10261 static SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) {
10262 DebugLoc dl = Op.getDebugLoc();
10263 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
10265 default: return SDValue(); // Don't custom lower most intrinsics.
10266 // Comparison intrinsics.
10267 case Intrinsic::x86_sse_comieq_ss:
10268 case Intrinsic::x86_sse_comilt_ss:
10269 case Intrinsic::x86_sse_comile_ss:
10270 case Intrinsic::x86_sse_comigt_ss:
10271 case Intrinsic::x86_sse_comige_ss:
10272 case Intrinsic::x86_sse_comineq_ss:
10273 case Intrinsic::x86_sse_ucomieq_ss:
10274 case Intrinsic::x86_sse_ucomilt_ss:
10275 case Intrinsic::x86_sse_ucomile_ss:
10276 case Intrinsic::x86_sse_ucomigt_ss:
10277 case Intrinsic::x86_sse_ucomige_ss:
10278 case Intrinsic::x86_sse_ucomineq_ss:
10279 case Intrinsic::x86_sse2_comieq_sd:
10280 case Intrinsic::x86_sse2_comilt_sd:
10281 case Intrinsic::x86_sse2_comile_sd:
10282 case Intrinsic::x86_sse2_comigt_sd:
10283 case Intrinsic::x86_sse2_comige_sd:
10284 case Intrinsic::x86_sse2_comineq_sd:
10285 case Intrinsic::x86_sse2_ucomieq_sd:
10286 case Intrinsic::x86_sse2_ucomilt_sd:
10287 case Intrinsic::x86_sse2_ucomile_sd:
10288 case Intrinsic::x86_sse2_ucomigt_sd:
10289 case Intrinsic::x86_sse2_ucomige_sd:
10290 case Intrinsic::x86_sse2_ucomineq_sd: {
10294 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
10295 case Intrinsic::x86_sse_comieq_ss:
10296 case Intrinsic::x86_sse2_comieq_sd:
10297 Opc = X86ISD::COMI;
10300 case Intrinsic::x86_sse_comilt_ss:
10301 case Intrinsic::x86_sse2_comilt_sd:
10302 Opc = X86ISD::COMI;
10305 case Intrinsic::x86_sse_comile_ss:
10306 case Intrinsic::x86_sse2_comile_sd:
10307 Opc = X86ISD::COMI;
10310 case Intrinsic::x86_sse_comigt_ss:
10311 case Intrinsic::x86_sse2_comigt_sd:
10312 Opc = X86ISD::COMI;
10315 case Intrinsic::x86_sse_comige_ss:
10316 case Intrinsic::x86_sse2_comige_sd:
10317 Opc = X86ISD::COMI;
10320 case Intrinsic::x86_sse_comineq_ss:
10321 case Intrinsic::x86_sse2_comineq_sd:
10322 Opc = X86ISD::COMI;
10325 case Intrinsic::x86_sse_ucomieq_ss:
10326 case Intrinsic::x86_sse2_ucomieq_sd:
10327 Opc = X86ISD::UCOMI;
10330 case Intrinsic::x86_sse_ucomilt_ss:
10331 case Intrinsic::x86_sse2_ucomilt_sd:
10332 Opc = X86ISD::UCOMI;
10335 case Intrinsic::x86_sse_ucomile_ss:
10336 case Intrinsic::x86_sse2_ucomile_sd:
10337 Opc = X86ISD::UCOMI;
10340 case Intrinsic::x86_sse_ucomigt_ss:
10341 case Intrinsic::x86_sse2_ucomigt_sd:
10342 Opc = X86ISD::UCOMI;
10345 case Intrinsic::x86_sse_ucomige_ss:
10346 case Intrinsic::x86_sse2_ucomige_sd:
10347 Opc = X86ISD::UCOMI;
10350 case Intrinsic::x86_sse_ucomineq_ss:
10351 case Intrinsic::x86_sse2_ucomineq_sd:
10352 Opc = X86ISD::UCOMI;
10357 SDValue LHS = Op.getOperand(1);
10358 SDValue RHS = Op.getOperand(2);
10359 unsigned X86CC = TranslateX86CC(CC, true, LHS, RHS, DAG);
10360 assert(X86CC != X86::COND_INVALID && "Unexpected illegal condition!");
10361 SDValue Cond = DAG.getNode(Opc, dl, MVT::i32, LHS, RHS);
10362 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
10363 DAG.getConstant(X86CC, MVT::i8), Cond);
10364 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
10367 // Arithmetic intrinsics.
10368 case Intrinsic::x86_sse2_pmulu_dq:
10369 case Intrinsic::x86_avx2_pmulu_dq:
10370 return DAG.getNode(X86ISD::PMULUDQ, dl, Op.getValueType(),
10371 Op.getOperand(1), Op.getOperand(2));
10373 // SSE2/AVX2 sub with unsigned saturation intrinsics
10374 case Intrinsic::x86_sse2_psubus_b:
10375 case Intrinsic::x86_sse2_psubus_w:
10376 case Intrinsic::x86_avx2_psubus_b:
10377 case Intrinsic::x86_avx2_psubus_w:
10378 return DAG.getNode(X86ISD::SUBUS, dl, Op.getValueType(),
10379 Op.getOperand(1), Op.getOperand(2));
10381 // SSE3/AVX horizontal add/sub intrinsics
10382 case Intrinsic::x86_sse3_hadd_ps:
10383 case Intrinsic::x86_sse3_hadd_pd:
10384 case Intrinsic::x86_avx_hadd_ps_256:
10385 case Intrinsic::x86_avx_hadd_pd_256:
10386 case Intrinsic::x86_sse3_hsub_ps:
10387 case Intrinsic::x86_sse3_hsub_pd:
10388 case Intrinsic::x86_avx_hsub_ps_256:
10389 case Intrinsic::x86_avx_hsub_pd_256:
10390 case Intrinsic::x86_ssse3_phadd_w_128:
10391 case Intrinsic::x86_ssse3_phadd_d_128:
10392 case Intrinsic::x86_avx2_phadd_w:
10393 case Intrinsic::x86_avx2_phadd_d:
10394 case Intrinsic::x86_ssse3_phsub_w_128:
10395 case Intrinsic::x86_ssse3_phsub_d_128:
10396 case Intrinsic::x86_avx2_phsub_w:
10397 case Intrinsic::x86_avx2_phsub_d: {
10400 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
10401 case Intrinsic::x86_sse3_hadd_ps:
10402 case Intrinsic::x86_sse3_hadd_pd:
10403 case Intrinsic::x86_avx_hadd_ps_256:
10404 case Intrinsic::x86_avx_hadd_pd_256:
10405 Opcode = X86ISD::FHADD;
10407 case Intrinsic::x86_sse3_hsub_ps:
10408 case Intrinsic::x86_sse3_hsub_pd:
10409 case Intrinsic::x86_avx_hsub_ps_256:
10410 case Intrinsic::x86_avx_hsub_pd_256:
10411 Opcode = X86ISD::FHSUB;
10413 case Intrinsic::x86_ssse3_phadd_w_128:
10414 case Intrinsic::x86_ssse3_phadd_d_128:
10415 case Intrinsic::x86_avx2_phadd_w:
10416 case Intrinsic::x86_avx2_phadd_d:
10417 Opcode = X86ISD::HADD;
10419 case Intrinsic::x86_ssse3_phsub_w_128:
10420 case Intrinsic::x86_ssse3_phsub_d_128:
10421 case Intrinsic::x86_avx2_phsub_w:
10422 case Intrinsic::x86_avx2_phsub_d:
10423 Opcode = X86ISD::HSUB;
10426 return DAG.getNode(Opcode, dl, Op.getValueType(),
10427 Op.getOperand(1), Op.getOperand(2));
10430 // SSE2/SSE41/AVX2 integer max/min intrinsics.
10431 case Intrinsic::x86_sse2_pmaxu_b:
10432 case Intrinsic::x86_sse41_pmaxuw:
10433 case Intrinsic::x86_sse41_pmaxud:
10434 case Intrinsic::x86_avx2_pmaxu_b:
10435 case Intrinsic::x86_avx2_pmaxu_w:
10436 case Intrinsic::x86_avx2_pmaxu_d:
10437 case Intrinsic::x86_sse2_pminu_b:
10438 case Intrinsic::x86_sse41_pminuw:
10439 case Intrinsic::x86_sse41_pminud:
10440 case Intrinsic::x86_avx2_pminu_b:
10441 case Intrinsic::x86_avx2_pminu_w:
10442 case Intrinsic::x86_avx2_pminu_d:
10443 case Intrinsic::x86_sse41_pmaxsb:
10444 case Intrinsic::x86_sse2_pmaxs_w:
10445 case Intrinsic::x86_sse41_pmaxsd:
10446 case Intrinsic::x86_avx2_pmaxs_b:
10447 case Intrinsic::x86_avx2_pmaxs_w:
10448 case Intrinsic::x86_avx2_pmaxs_d:
10449 case Intrinsic::x86_sse41_pminsb:
10450 case Intrinsic::x86_sse2_pmins_w:
10451 case Intrinsic::x86_sse41_pminsd:
10452 case Intrinsic::x86_avx2_pmins_b:
10453 case Intrinsic::x86_avx2_pmins_w:
10454 case Intrinsic::x86_avx2_pmins_d: {
10457 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
10458 case Intrinsic::x86_sse2_pmaxu_b:
10459 case Intrinsic::x86_sse41_pmaxuw:
10460 case Intrinsic::x86_sse41_pmaxud:
10461 case Intrinsic::x86_avx2_pmaxu_b:
10462 case Intrinsic::x86_avx2_pmaxu_w:
10463 case Intrinsic::x86_avx2_pmaxu_d:
10464 Opcode = X86ISD::UMAX;
10466 case Intrinsic::x86_sse2_pminu_b:
10467 case Intrinsic::x86_sse41_pminuw:
10468 case Intrinsic::x86_sse41_pminud:
10469 case Intrinsic::x86_avx2_pminu_b:
10470 case Intrinsic::x86_avx2_pminu_w:
10471 case Intrinsic::x86_avx2_pminu_d:
10472 Opcode = X86ISD::UMIN;
10474 case Intrinsic::x86_sse41_pmaxsb:
10475 case Intrinsic::x86_sse2_pmaxs_w:
10476 case Intrinsic::x86_sse41_pmaxsd:
10477 case Intrinsic::x86_avx2_pmaxs_b:
10478 case Intrinsic::x86_avx2_pmaxs_w:
10479 case Intrinsic::x86_avx2_pmaxs_d:
10480 Opcode = X86ISD::SMAX;
10482 case Intrinsic::x86_sse41_pminsb:
10483 case Intrinsic::x86_sse2_pmins_w:
10484 case Intrinsic::x86_sse41_pminsd:
10485 case Intrinsic::x86_avx2_pmins_b:
10486 case Intrinsic::x86_avx2_pmins_w:
10487 case Intrinsic::x86_avx2_pmins_d:
10488 Opcode = X86ISD::SMIN;
10491 return DAG.getNode(Opcode, dl, Op.getValueType(),
10492 Op.getOperand(1), Op.getOperand(2));
10495 // SSE/SSE2/AVX floating point max/min intrinsics.
10496 case Intrinsic::x86_sse_max_ps:
10497 case Intrinsic::x86_sse2_max_pd:
10498 case Intrinsic::x86_avx_max_ps_256:
10499 case Intrinsic::x86_avx_max_pd_256:
10500 case Intrinsic::x86_sse_min_ps:
10501 case Intrinsic::x86_sse2_min_pd:
10502 case Intrinsic::x86_avx_min_ps_256:
10503 case Intrinsic::x86_avx_min_pd_256: {
10506 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
10507 case Intrinsic::x86_sse_max_ps:
10508 case Intrinsic::x86_sse2_max_pd:
10509 case Intrinsic::x86_avx_max_ps_256:
10510 case Intrinsic::x86_avx_max_pd_256:
10511 Opcode = X86ISD::FMAX;
10513 case Intrinsic::x86_sse_min_ps:
10514 case Intrinsic::x86_sse2_min_pd:
10515 case Intrinsic::x86_avx_min_ps_256:
10516 case Intrinsic::x86_avx_min_pd_256:
10517 Opcode = X86ISD::FMIN;
10520 return DAG.getNode(Opcode, dl, Op.getValueType(),
10521 Op.getOperand(1), Op.getOperand(2));
10524 // AVX2 variable shift intrinsics
10525 case Intrinsic::x86_avx2_psllv_d:
10526 case Intrinsic::x86_avx2_psllv_q:
10527 case Intrinsic::x86_avx2_psllv_d_256:
10528 case Intrinsic::x86_avx2_psllv_q_256:
10529 case Intrinsic::x86_avx2_psrlv_d:
10530 case Intrinsic::x86_avx2_psrlv_q:
10531 case Intrinsic::x86_avx2_psrlv_d_256:
10532 case Intrinsic::x86_avx2_psrlv_q_256:
10533 case Intrinsic::x86_avx2_psrav_d:
10534 case Intrinsic::x86_avx2_psrav_d_256: {
10537 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
10538 case Intrinsic::x86_avx2_psllv_d:
10539 case Intrinsic::x86_avx2_psllv_q:
10540 case Intrinsic::x86_avx2_psllv_d_256:
10541 case Intrinsic::x86_avx2_psllv_q_256:
10544 case Intrinsic::x86_avx2_psrlv_d:
10545 case Intrinsic::x86_avx2_psrlv_q:
10546 case Intrinsic::x86_avx2_psrlv_d_256:
10547 case Intrinsic::x86_avx2_psrlv_q_256:
10550 case Intrinsic::x86_avx2_psrav_d:
10551 case Intrinsic::x86_avx2_psrav_d_256:
10555 return DAG.getNode(Opcode, dl, Op.getValueType(),
10556 Op.getOperand(1), Op.getOperand(2));
10559 case Intrinsic::x86_ssse3_pshuf_b_128:
10560 case Intrinsic::x86_avx2_pshuf_b:
10561 return DAG.getNode(X86ISD::PSHUFB, dl, Op.getValueType(),
10562 Op.getOperand(1), Op.getOperand(2));
10564 case Intrinsic::x86_ssse3_psign_b_128:
10565 case Intrinsic::x86_ssse3_psign_w_128:
10566 case Intrinsic::x86_ssse3_psign_d_128:
10567 case Intrinsic::x86_avx2_psign_b:
10568 case Intrinsic::x86_avx2_psign_w:
10569 case Intrinsic::x86_avx2_psign_d:
10570 return DAG.getNode(X86ISD::PSIGN, dl, Op.getValueType(),
10571 Op.getOperand(1), Op.getOperand(2));
10573 case Intrinsic::x86_sse41_insertps:
10574 return DAG.getNode(X86ISD::INSERTPS, dl, Op.getValueType(),
10575 Op.getOperand(1), Op.getOperand(2), Op.getOperand(3));
10577 case Intrinsic::x86_avx_vperm2f128_ps_256:
10578 case Intrinsic::x86_avx_vperm2f128_pd_256:
10579 case Intrinsic::x86_avx_vperm2f128_si_256:
10580 case Intrinsic::x86_avx2_vperm2i128:
10581 return DAG.getNode(X86ISD::VPERM2X128, dl, Op.getValueType(),
10582 Op.getOperand(1), Op.getOperand(2), Op.getOperand(3));
10584 case Intrinsic::x86_avx2_permd:
10585 case Intrinsic::x86_avx2_permps:
10586 // Operands intentionally swapped. Mask is last operand to intrinsic,
10587 // but second operand for node/intruction.
10588 return DAG.getNode(X86ISD::VPERMV, dl, Op.getValueType(),
10589 Op.getOperand(2), Op.getOperand(1));
10591 case Intrinsic::x86_sse_sqrt_ps:
10592 case Intrinsic::x86_sse2_sqrt_pd:
10593 case Intrinsic::x86_avx_sqrt_ps_256:
10594 case Intrinsic::x86_avx_sqrt_pd_256:
10595 return DAG.getNode(ISD::FSQRT, dl, Op.getValueType(), Op.getOperand(1));
10597 // ptest and testp intrinsics. The intrinsic these come from are designed to
10598 // return an integer value, not just an instruction so lower it to the ptest
10599 // or testp pattern and a setcc for the result.
10600 case Intrinsic::x86_sse41_ptestz:
10601 case Intrinsic::x86_sse41_ptestc:
10602 case Intrinsic::x86_sse41_ptestnzc:
10603 case Intrinsic::x86_avx_ptestz_256:
10604 case Intrinsic::x86_avx_ptestc_256:
10605 case Intrinsic::x86_avx_ptestnzc_256:
10606 case Intrinsic::x86_avx_vtestz_ps:
10607 case Intrinsic::x86_avx_vtestc_ps:
10608 case Intrinsic::x86_avx_vtestnzc_ps:
10609 case Intrinsic::x86_avx_vtestz_pd:
10610 case Intrinsic::x86_avx_vtestc_pd:
10611 case Intrinsic::x86_avx_vtestnzc_pd:
10612 case Intrinsic::x86_avx_vtestz_ps_256:
10613 case Intrinsic::x86_avx_vtestc_ps_256:
10614 case Intrinsic::x86_avx_vtestnzc_ps_256:
10615 case Intrinsic::x86_avx_vtestz_pd_256:
10616 case Intrinsic::x86_avx_vtestc_pd_256:
10617 case Intrinsic::x86_avx_vtestnzc_pd_256: {
10618 bool IsTestPacked = false;
10621 default: llvm_unreachable("Bad fallthrough in Intrinsic lowering.");
10622 case Intrinsic::x86_avx_vtestz_ps:
10623 case Intrinsic::x86_avx_vtestz_pd:
10624 case Intrinsic::x86_avx_vtestz_ps_256:
10625 case Intrinsic::x86_avx_vtestz_pd_256:
10626 IsTestPacked = true; // Fallthrough
10627 case Intrinsic::x86_sse41_ptestz:
10628 case Intrinsic::x86_avx_ptestz_256:
10630 X86CC = X86::COND_E;
10632 case Intrinsic::x86_avx_vtestc_ps:
10633 case Intrinsic::x86_avx_vtestc_pd:
10634 case Intrinsic::x86_avx_vtestc_ps_256:
10635 case Intrinsic::x86_avx_vtestc_pd_256:
10636 IsTestPacked = true; // Fallthrough
10637 case Intrinsic::x86_sse41_ptestc:
10638 case Intrinsic::x86_avx_ptestc_256:
10640 X86CC = X86::COND_B;
10642 case Intrinsic::x86_avx_vtestnzc_ps:
10643 case Intrinsic::x86_avx_vtestnzc_pd:
10644 case Intrinsic::x86_avx_vtestnzc_ps_256:
10645 case Intrinsic::x86_avx_vtestnzc_pd_256:
10646 IsTestPacked = true; // Fallthrough
10647 case Intrinsic::x86_sse41_ptestnzc:
10648 case Intrinsic::x86_avx_ptestnzc_256:
10650 X86CC = X86::COND_A;
10654 SDValue LHS = Op.getOperand(1);
10655 SDValue RHS = Op.getOperand(2);
10656 unsigned TestOpc = IsTestPacked ? X86ISD::TESTP : X86ISD::PTEST;
10657 SDValue Test = DAG.getNode(TestOpc, dl, MVT::i32, LHS, RHS);
10658 SDValue CC = DAG.getConstant(X86CC, MVT::i8);
10659 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8, CC, Test);
10660 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
10663 // SSE/AVX shift intrinsics
10664 case Intrinsic::x86_sse2_psll_w:
10665 case Intrinsic::x86_sse2_psll_d:
10666 case Intrinsic::x86_sse2_psll_q:
10667 case Intrinsic::x86_avx2_psll_w:
10668 case Intrinsic::x86_avx2_psll_d:
10669 case Intrinsic::x86_avx2_psll_q:
10670 case Intrinsic::x86_sse2_psrl_w:
10671 case Intrinsic::x86_sse2_psrl_d:
10672 case Intrinsic::x86_sse2_psrl_q:
10673 case Intrinsic::x86_avx2_psrl_w:
10674 case Intrinsic::x86_avx2_psrl_d:
10675 case Intrinsic::x86_avx2_psrl_q:
10676 case Intrinsic::x86_sse2_psra_w:
10677 case Intrinsic::x86_sse2_psra_d:
10678 case Intrinsic::x86_avx2_psra_w:
10679 case Intrinsic::x86_avx2_psra_d: {
10682 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
10683 case Intrinsic::x86_sse2_psll_w:
10684 case Intrinsic::x86_sse2_psll_d:
10685 case Intrinsic::x86_sse2_psll_q:
10686 case Intrinsic::x86_avx2_psll_w:
10687 case Intrinsic::x86_avx2_psll_d:
10688 case Intrinsic::x86_avx2_psll_q:
10689 Opcode = X86ISD::VSHL;
10691 case Intrinsic::x86_sse2_psrl_w:
10692 case Intrinsic::x86_sse2_psrl_d:
10693 case Intrinsic::x86_sse2_psrl_q:
10694 case Intrinsic::x86_avx2_psrl_w:
10695 case Intrinsic::x86_avx2_psrl_d:
10696 case Intrinsic::x86_avx2_psrl_q:
10697 Opcode = X86ISD::VSRL;
10699 case Intrinsic::x86_sse2_psra_w:
10700 case Intrinsic::x86_sse2_psra_d:
10701 case Intrinsic::x86_avx2_psra_w:
10702 case Intrinsic::x86_avx2_psra_d:
10703 Opcode = X86ISD::VSRA;
10706 return DAG.getNode(Opcode, dl, Op.getValueType(),
10707 Op.getOperand(1), Op.getOperand(2));
10710 // SSE/AVX immediate shift intrinsics
10711 case Intrinsic::x86_sse2_pslli_w:
10712 case Intrinsic::x86_sse2_pslli_d:
10713 case Intrinsic::x86_sse2_pslli_q:
10714 case Intrinsic::x86_avx2_pslli_w:
10715 case Intrinsic::x86_avx2_pslli_d:
10716 case Intrinsic::x86_avx2_pslli_q:
10717 case Intrinsic::x86_sse2_psrli_w:
10718 case Intrinsic::x86_sse2_psrli_d:
10719 case Intrinsic::x86_sse2_psrli_q:
10720 case Intrinsic::x86_avx2_psrli_w:
10721 case Intrinsic::x86_avx2_psrli_d:
10722 case Intrinsic::x86_avx2_psrli_q:
10723 case Intrinsic::x86_sse2_psrai_w:
10724 case Intrinsic::x86_sse2_psrai_d:
10725 case Intrinsic::x86_avx2_psrai_w:
10726 case Intrinsic::x86_avx2_psrai_d: {
10729 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
10730 case Intrinsic::x86_sse2_pslli_w:
10731 case Intrinsic::x86_sse2_pslli_d:
10732 case Intrinsic::x86_sse2_pslli_q:
10733 case Intrinsic::x86_avx2_pslli_w:
10734 case Intrinsic::x86_avx2_pslli_d:
10735 case Intrinsic::x86_avx2_pslli_q:
10736 Opcode = X86ISD::VSHLI;
10738 case Intrinsic::x86_sse2_psrli_w:
10739 case Intrinsic::x86_sse2_psrli_d:
10740 case Intrinsic::x86_sse2_psrli_q:
10741 case Intrinsic::x86_avx2_psrli_w:
10742 case Intrinsic::x86_avx2_psrli_d:
10743 case Intrinsic::x86_avx2_psrli_q:
10744 Opcode = X86ISD::VSRLI;
10746 case Intrinsic::x86_sse2_psrai_w:
10747 case Intrinsic::x86_sse2_psrai_d:
10748 case Intrinsic::x86_avx2_psrai_w:
10749 case Intrinsic::x86_avx2_psrai_d:
10750 Opcode = X86ISD::VSRAI;
10753 return getTargetVShiftNode(Opcode, dl, Op.getValueType(),
10754 Op.getOperand(1), Op.getOperand(2), DAG);
10757 case Intrinsic::x86_sse42_pcmpistria128:
10758 case Intrinsic::x86_sse42_pcmpestria128:
10759 case Intrinsic::x86_sse42_pcmpistric128:
10760 case Intrinsic::x86_sse42_pcmpestric128:
10761 case Intrinsic::x86_sse42_pcmpistrio128:
10762 case Intrinsic::x86_sse42_pcmpestrio128:
10763 case Intrinsic::x86_sse42_pcmpistris128:
10764 case Intrinsic::x86_sse42_pcmpestris128:
10765 case Intrinsic::x86_sse42_pcmpistriz128:
10766 case Intrinsic::x86_sse42_pcmpestriz128: {
10770 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
10771 case Intrinsic::x86_sse42_pcmpistria128:
10772 Opcode = X86ISD::PCMPISTRI;
10773 X86CC = X86::COND_A;
10775 case Intrinsic::x86_sse42_pcmpestria128:
10776 Opcode = X86ISD::PCMPESTRI;
10777 X86CC = X86::COND_A;
10779 case Intrinsic::x86_sse42_pcmpistric128:
10780 Opcode = X86ISD::PCMPISTRI;
10781 X86CC = X86::COND_B;
10783 case Intrinsic::x86_sse42_pcmpestric128:
10784 Opcode = X86ISD::PCMPESTRI;
10785 X86CC = X86::COND_B;
10787 case Intrinsic::x86_sse42_pcmpistrio128:
10788 Opcode = X86ISD::PCMPISTRI;
10789 X86CC = X86::COND_O;
10791 case Intrinsic::x86_sse42_pcmpestrio128:
10792 Opcode = X86ISD::PCMPESTRI;
10793 X86CC = X86::COND_O;
10795 case Intrinsic::x86_sse42_pcmpistris128:
10796 Opcode = X86ISD::PCMPISTRI;
10797 X86CC = X86::COND_S;
10799 case Intrinsic::x86_sse42_pcmpestris128:
10800 Opcode = X86ISD::PCMPESTRI;
10801 X86CC = X86::COND_S;
10803 case Intrinsic::x86_sse42_pcmpistriz128:
10804 Opcode = X86ISD::PCMPISTRI;
10805 X86CC = X86::COND_E;
10807 case Intrinsic::x86_sse42_pcmpestriz128:
10808 Opcode = X86ISD::PCMPESTRI;
10809 X86CC = X86::COND_E;
10812 SmallVector<SDValue, 5> NewOps;
10813 NewOps.append(Op->op_begin()+1, Op->op_end());
10814 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32);
10815 SDValue PCMP = DAG.getNode(Opcode, dl, VTs, NewOps.data(), NewOps.size());
10816 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
10817 DAG.getConstant(X86CC, MVT::i8),
10818 SDValue(PCMP.getNode(), 1));
10819 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
10822 case Intrinsic::x86_sse42_pcmpistri128:
10823 case Intrinsic::x86_sse42_pcmpestri128: {
10825 if (IntNo == Intrinsic::x86_sse42_pcmpistri128)
10826 Opcode = X86ISD::PCMPISTRI;
10828 Opcode = X86ISD::PCMPESTRI;
10830 SmallVector<SDValue, 5> NewOps;
10831 NewOps.append(Op->op_begin()+1, Op->op_end());
10832 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32);
10833 return DAG.getNode(Opcode, dl, VTs, NewOps.data(), NewOps.size());
10835 case Intrinsic::x86_fma_vfmadd_ps:
10836 case Intrinsic::x86_fma_vfmadd_pd:
10837 case Intrinsic::x86_fma_vfmsub_ps:
10838 case Intrinsic::x86_fma_vfmsub_pd:
10839 case Intrinsic::x86_fma_vfnmadd_ps:
10840 case Intrinsic::x86_fma_vfnmadd_pd:
10841 case Intrinsic::x86_fma_vfnmsub_ps:
10842 case Intrinsic::x86_fma_vfnmsub_pd:
10843 case Intrinsic::x86_fma_vfmaddsub_ps:
10844 case Intrinsic::x86_fma_vfmaddsub_pd:
10845 case Intrinsic::x86_fma_vfmsubadd_ps:
10846 case Intrinsic::x86_fma_vfmsubadd_pd:
10847 case Intrinsic::x86_fma_vfmadd_ps_256:
10848 case Intrinsic::x86_fma_vfmadd_pd_256:
10849 case Intrinsic::x86_fma_vfmsub_ps_256:
10850 case Intrinsic::x86_fma_vfmsub_pd_256:
10851 case Intrinsic::x86_fma_vfnmadd_ps_256:
10852 case Intrinsic::x86_fma_vfnmadd_pd_256:
10853 case Intrinsic::x86_fma_vfnmsub_ps_256:
10854 case Intrinsic::x86_fma_vfnmsub_pd_256:
10855 case Intrinsic::x86_fma_vfmaddsub_ps_256:
10856 case Intrinsic::x86_fma_vfmaddsub_pd_256:
10857 case Intrinsic::x86_fma_vfmsubadd_ps_256:
10858 case Intrinsic::x86_fma_vfmsubadd_pd_256: {
10861 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
10862 case Intrinsic::x86_fma_vfmadd_ps:
10863 case Intrinsic::x86_fma_vfmadd_pd:
10864 case Intrinsic::x86_fma_vfmadd_ps_256:
10865 case Intrinsic::x86_fma_vfmadd_pd_256:
10866 Opc = X86ISD::FMADD;
10868 case Intrinsic::x86_fma_vfmsub_ps:
10869 case Intrinsic::x86_fma_vfmsub_pd:
10870 case Intrinsic::x86_fma_vfmsub_ps_256:
10871 case Intrinsic::x86_fma_vfmsub_pd_256:
10872 Opc = X86ISD::FMSUB;
10874 case Intrinsic::x86_fma_vfnmadd_ps:
10875 case Intrinsic::x86_fma_vfnmadd_pd:
10876 case Intrinsic::x86_fma_vfnmadd_ps_256:
10877 case Intrinsic::x86_fma_vfnmadd_pd_256:
10878 Opc = X86ISD::FNMADD;
10880 case Intrinsic::x86_fma_vfnmsub_ps:
10881 case Intrinsic::x86_fma_vfnmsub_pd:
10882 case Intrinsic::x86_fma_vfnmsub_ps_256:
10883 case Intrinsic::x86_fma_vfnmsub_pd_256:
10884 Opc = X86ISD::FNMSUB;
10886 case Intrinsic::x86_fma_vfmaddsub_ps:
10887 case Intrinsic::x86_fma_vfmaddsub_pd:
10888 case Intrinsic::x86_fma_vfmaddsub_ps_256:
10889 case Intrinsic::x86_fma_vfmaddsub_pd_256:
10890 Opc = X86ISD::FMADDSUB;
10892 case Intrinsic::x86_fma_vfmsubadd_ps:
10893 case Intrinsic::x86_fma_vfmsubadd_pd:
10894 case Intrinsic::x86_fma_vfmsubadd_ps_256:
10895 case Intrinsic::x86_fma_vfmsubadd_pd_256:
10896 Opc = X86ISD::FMSUBADD;
10900 return DAG.getNode(Opc, dl, Op.getValueType(), Op.getOperand(1),
10901 Op.getOperand(2), Op.getOperand(3));
10906 static SDValue LowerINTRINSIC_W_CHAIN(SDValue Op, SelectionDAG &DAG) {
10907 DebugLoc dl = Op.getDebugLoc();
10908 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
10910 default: return SDValue(); // Don't custom lower most intrinsics.
10912 // RDRAND intrinsics.
10913 case Intrinsic::x86_rdrand_16:
10914 case Intrinsic::x86_rdrand_32:
10915 case Intrinsic::x86_rdrand_64: {
10916 // Emit the node with the right value type.
10917 SDVTList VTs = DAG.getVTList(Op->getValueType(0), MVT::Glue, MVT::Other);
10918 SDValue Result = DAG.getNode(X86ISD::RDRAND, dl, VTs, Op.getOperand(0));
10920 // If the value returned by RDRAND was valid (CF=1), return 1. Otherwise
10921 // return the value from Rand, which is always 0, casted to i32.
10922 SDValue Ops[] = { DAG.getZExtOrTrunc(Result, dl, Op->getValueType(1)),
10923 DAG.getConstant(1, Op->getValueType(1)),
10924 DAG.getConstant(X86::COND_B, MVT::i32),
10925 SDValue(Result.getNode(), 1) };
10926 SDValue isValid = DAG.getNode(X86ISD::CMOV, dl,
10927 DAG.getVTList(Op->getValueType(1), MVT::Glue),
10930 // Return { result, isValid, chain }.
10931 return DAG.getNode(ISD::MERGE_VALUES, dl, Op->getVTList(), Result, isValid,
10932 SDValue(Result.getNode(), 2));
10937 SDValue X86TargetLowering::LowerRETURNADDR(SDValue Op,
10938 SelectionDAG &DAG) const {
10939 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
10940 MFI->setReturnAddressIsTaken(true);
10942 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
10943 DebugLoc dl = Op.getDebugLoc();
10944 EVT PtrVT = getPointerTy();
10947 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
10949 DAG.getConstant(RegInfo->getSlotSize(), PtrVT);
10950 return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
10951 DAG.getNode(ISD::ADD, dl, PtrVT,
10952 FrameAddr, Offset),
10953 MachinePointerInfo(), false, false, false, 0);
10956 // Just load the return address.
10957 SDValue RetAddrFI = getReturnAddressFrameIndex(DAG);
10958 return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
10959 RetAddrFI, MachinePointerInfo(), false, false, false, 0);
10962 SDValue X86TargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
10963 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
10964 MFI->setFrameAddressIsTaken(true);
10966 EVT VT = Op.getValueType();
10967 DebugLoc dl = Op.getDebugLoc(); // FIXME probably not meaningful
10968 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
10969 unsigned FrameReg = Subtarget->is64Bit() ? X86::RBP : X86::EBP;
10970 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
10972 FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr,
10973 MachinePointerInfo(),
10974 false, false, false, 0);
10978 SDValue X86TargetLowering::LowerFRAME_TO_ARGS_OFFSET(SDValue Op,
10979 SelectionDAG &DAG) const {
10980 return DAG.getIntPtrConstant(2 * RegInfo->getSlotSize());
10983 SDValue X86TargetLowering::LowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const {
10984 SDValue Chain = Op.getOperand(0);
10985 SDValue Offset = Op.getOperand(1);
10986 SDValue Handler = Op.getOperand(2);
10987 DebugLoc dl = Op.getDebugLoc();
10989 SDValue Frame = DAG.getCopyFromReg(DAG.getEntryNode(), dl,
10990 Subtarget->is64Bit() ? X86::RBP : X86::EBP,
10992 unsigned StoreAddrReg = (Subtarget->is64Bit() ? X86::RCX : X86::ECX);
10994 SDValue StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), Frame,
10995 DAG.getIntPtrConstant(RegInfo->getSlotSize()));
10996 StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), StoreAddr, Offset);
10997 Chain = DAG.getStore(Chain, dl, Handler, StoreAddr, MachinePointerInfo(),
10999 Chain = DAG.getCopyToReg(Chain, dl, StoreAddrReg, StoreAddr);
11001 return DAG.getNode(X86ISD::EH_RETURN, dl,
11003 Chain, DAG.getRegister(StoreAddrReg, getPointerTy()));
11006 SDValue X86TargetLowering::lowerEH_SJLJ_SETJMP(SDValue Op,
11007 SelectionDAG &DAG) const {
11008 DebugLoc DL = Op.getDebugLoc();
11009 return DAG.getNode(X86ISD::EH_SJLJ_SETJMP, DL,
11010 DAG.getVTList(MVT::i32, MVT::Other),
11011 Op.getOperand(0), Op.getOperand(1));
11014 SDValue X86TargetLowering::lowerEH_SJLJ_LONGJMP(SDValue Op,
11015 SelectionDAG &DAG) const {
11016 DebugLoc DL = Op.getDebugLoc();
11017 return DAG.getNode(X86ISD::EH_SJLJ_LONGJMP, DL, MVT::Other,
11018 Op.getOperand(0), Op.getOperand(1));
11021 static SDValue LowerADJUST_TRAMPOLINE(SDValue Op, SelectionDAG &DAG) {
11022 return Op.getOperand(0);
11025 SDValue X86TargetLowering::LowerINIT_TRAMPOLINE(SDValue Op,
11026 SelectionDAG &DAG) const {
11027 SDValue Root = Op.getOperand(0);
11028 SDValue Trmp = Op.getOperand(1); // trampoline
11029 SDValue FPtr = Op.getOperand(2); // nested function
11030 SDValue Nest = Op.getOperand(3); // 'nest' parameter value
11031 DebugLoc dl = Op.getDebugLoc();
11033 const Value *TrmpAddr = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
11034 const TargetRegisterInfo* TRI = getTargetMachine().getRegisterInfo();
11036 if (Subtarget->is64Bit()) {
11037 SDValue OutChains[6];
11039 // Large code-model.
11040 const unsigned char JMP64r = 0xFF; // 64-bit jmp through register opcode.
11041 const unsigned char MOV64ri = 0xB8; // X86::MOV64ri opcode.
11043 const unsigned char N86R10 = TRI->getEncodingValue(X86::R10) & 0x7;
11044 const unsigned char N86R11 = TRI->getEncodingValue(X86::R11) & 0x7;
11046 const unsigned char REX_WB = 0x40 | 0x08 | 0x01; // REX prefix
11048 // Load the pointer to the nested function into R11.
11049 unsigned OpCode = ((MOV64ri | N86R11) << 8) | REX_WB; // movabsq r11
11050 SDValue Addr = Trmp;
11051 OutChains[0] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
11052 Addr, MachinePointerInfo(TrmpAddr),
11055 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
11056 DAG.getConstant(2, MVT::i64));
11057 OutChains[1] = DAG.getStore(Root, dl, FPtr, Addr,
11058 MachinePointerInfo(TrmpAddr, 2),
11061 // Load the 'nest' parameter value into R10.
11062 // R10 is specified in X86CallingConv.td
11063 OpCode = ((MOV64ri | N86R10) << 8) | REX_WB; // movabsq r10
11064 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
11065 DAG.getConstant(10, MVT::i64));
11066 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
11067 Addr, MachinePointerInfo(TrmpAddr, 10),
11070 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
11071 DAG.getConstant(12, MVT::i64));
11072 OutChains[3] = DAG.getStore(Root, dl, Nest, Addr,
11073 MachinePointerInfo(TrmpAddr, 12),
11076 // Jump to the nested function.
11077 OpCode = (JMP64r << 8) | REX_WB; // jmpq *...
11078 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
11079 DAG.getConstant(20, MVT::i64));
11080 OutChains[4] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
11081 Addr, MachinePointerInfo(TrmpAddr, 20),
11084 unsigned char ModRM = N86R11 | (4 << 3) | (3 << 6); // ...r11
11085 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
11086 DAG.getConstant(22, MVT::i64));
11087 OutChains[5] = DAG.getStore(Root, dl, DAG.getConstant(ModRM, MVT::i8), Addr,
11088 MachinePointerInfo(TrmpAddr, 22),
11091 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 6);
11093 const Function *Func =
11094 cast<Function>(cast<SrcValueSDNode>(Op.getOperand(5))->getValue());
11095 CallingConv::ID CC = Func->getCallingConv();
11100 llvm_unreachable("Unsupported calling convention");
11101 case CallingConv::C:
11102 case CallingConv::X86_StdCall: {
11103 // Pass 'nest' parameter in ECX.
11104 // Must be kept in sync with X86CallingConv.td
11105 NestReg = X86::ECX;
11107 // Check that ECX wasn't needed by an 'inreg' parameter.
11108 FunctionType *FTy = Func->getFunctionType();
11109 const AttributeSet &Attrs = Func->getAttributes();
11111 if (!Attrs.isEmpty() && !Func->isVarArg()) {
11112 unsigned InRegCount = 0;
11115 for (FunctionType::param_iterator I = FTy->param_begin(),
11116 E = FTy->param_end(); I != E; ++I, ++Idx)
11117 if (Attrs.hasAttribute(Idx, Attribute::InReg))
11118 // FIXME: should only count parameters that are lowered to integers.
11119 InRegCount += (TD->getTypeSizeInBits(*I) + 31) / 32;
11121 if (InRegCount > 2) {
11122 report_fatal_error("Nest register in use - reduce number of inreg"
11128 case CallingConv::X86_FastCall:
11129 case CallingConv::X86_ThisCall:
11130 case CallingConv::Fast:
11131 // Pass 'nest' parameter in EAX.
11132 // Must be kept in sync with X86CallingConv.td
11133 NestReg = X86::EAX;
11137 SDValue OutChains[4];
11138 SDValue Addr, Disp;
11140 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
11141 DAG.getConstant(10, MVT::i32));
11142 Disp = DAG.getNode(ISD::SUB, dl, MVT::i32, FPtr, Addr);
11144 // This is storing the opcode for MOV32ri.
11145 const unsigned char MOV32ri = 0xB8; // X86::MOV32ri's opcode byte.
11146 const unsigned char N86Reg = TRI->getEncodingValue(NestReg) & 0x7;
11147 OutChains[0] = DAG.getStore(Root, dl,
11148 DAG.getConstant(MOV32ri|N86Reg, MVT::i8),
11149 Trmp, MachinePointerInfo(TrmpAddr),
11152 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
11153 DAG.getConstant(1, MVT::i32));
11154 OutChains[1] = DAG.getStore(Root, dl, Nest, Addr,
11155 MachinePointerInfo(TrmpAddr, 1),
11158 const unsigned char JMP = 0xE9; // jmp <32bit dst> opcode.
11159 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
11160 DAG.getConstant(5, MVT::i32));
11161 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(JMP, MVT::i8), Addr,
11162 MachinePointerInfo(TrmpAddr, 5),
11165 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
11166 DAG.getConstant(6, MVT::i32));
11167 OutChains[3] = DAG.getStore(Root, dl, Disp, Addr,
11168 MachinePointerInfo(TrmpAddr, 6),
11171 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 4);
11175 SDValue X86TargetLowering::LowerFLT_ROUNDS_(SDValue Op,
11176 SelectionDAG &DAG) const {
11178 The rounding mode is in bits 11:10 of FPSR, and has the following
11180 00 Round to nearest
11185 FLT_ROUNDS, on the other hand, expects the following:
11192 To perform the conversion, we do:
11193 (((((FPSR & 0x800) >> 11) | ((FPSR & 0x400) >> 9)) + 1) & 3)
11196 MachineFunction &MF = DAG.getMachineFunction();
11197 const TargetMachine &TM = MF.getTarget();
11198 const TargetFrameLowering &TFI = *TM.getFrameLowering();
11199 unsigned StackAlignment = TFI.getStackAlignment();
11200 EVT VT = Op.getValueType();
11201 DebugLoc DL = Op.getDebugLoc();
11203 // Save FP Control Word to stack slot
11204 int SSFI = MF.getFrameInfo()->CreateStackObject(2, StackAlignment, false);
11205 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
11207 MachineMemOperand *MMO =
11208 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
11209 MachineMemOperand::MOStore, 2, 2);
11211 SDValue Ops[] = { DAG.getEntryNode(), StackSlot };
11212 SDValue Chain = DAG.getMemIntrinsicNode(X86ISD::FNSTCW16m, DL,
11213 DAG.getVTList(MVT::Other),
11214 Ops, 2, MVT::i16, MMO);
11216 // Load FP Control Word from stack slot
11217 SDValue CWD = DAG.getLoad(MVT::i16, DL, Chain, StackSlot,
11218 MachinePointerInfo(), false, false, false, 0);
11220 // Transform as necessary
11222 DAG.getNode(ISD::SRL, DL, MVT::i16,
11223 DAG.getNode(ISD::AND, DL, MVT::i16,
11224 CWD, DAG.getConstant(0x800, MVT::i16)),
11225 DAG.getConstant(11, MVT::i8));
11227 DAG.getNode(ISD::SRL, DL, MVT::i16,
11228 DAG.getNode(ISD::AND, DL, MVT::i16,
11229 CWD, DAG.getConstant(0x400, MVT::i16)),
11230 DAG.getConstant(9, MVT::i8));
11233 DAG.getNode(ISD::AND, DL, MVT::i16,
11234 DAG.getNode(ISD::ADD, DL, MVT::i16,
11235 DAG.getNode(ISD::OR, DL, MVT::i16, CWD1, CWD2),
11236 DAG.getConstant(1, MVT::i16)),
11237 DAG.getConstant(3, MVT::i16));
11239 return DAG.getNode((VT.getSizeInBits() < 16 ?
11240 ISD::TRUNCATE : ISD::ZERO_EXTEND), DL, VT, RetVal);
11243 static SDValue LowerCTLZ(SDValue Op, SelectionDAG &DAG) {
11244 EVT VT = Op.getValueType();
11246 unsigned NumBits = VT.getSizeInBits();
11247 DebugLoc dl = Op.getDebugLoc();
11249 Op = Op.getOperand(0);
11250 if (VT == MVT::i8) {
11251 // Zero extend to i32 since there is not an i8 bsr.
11253 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
11256 // Issue a bsr (scan bits in reverse) which also sets EFLAGS.
11257 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
11258 Op = DAG.getNode(X86ISD::BSR, dl, VTs, Op);
11260 // If src is zero (i.e. bsr sets ZF), returns NumBits.
11263 DAG.getConstant(NumBits+NumBits-1, OpVT),
11264 DAG.getConstant(X86::COND_E, MVT::i8),
11267 Op = DAG.getNode(X86ISD::CMOV, dl, OpVT, Ops, array_lengthof(Ops));
11269 // Finally xor with NumBits-1.
11270 Op = DAG.getNode(ISD::XOR, dl, OpVT, Op, DAG.getConstant(NumBits-1, OpVT));
11273 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
11277 static SDValue LowerCTLZ_ZERO_UNDEF(SDValue Op, SelectionDAG &DAG) {
11278 EVT VT = Op.getValueType();
11280 unsigned NumBits = VT.getSizeInBits();
11281 DebugLoc dl = Op.getDebugLoc();
11283 Op = Op.getOperand(0);
11284 if (VT == MVT::i8) {
11285 // Zero extend to i32 since there is not an i8 bsr.
11287 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
11290 // Issue a bsr (scan bits in reverse).
11291 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
11292 Op = DAG.getNode(X86ISD::BSR, dl, VTs, Op);
11294 // And xor with NumBits-1.
11295 Op = DAG.getNode(ISD::XOR, dl, OpVT, Op, DAG.getConstant(NumBits-1, OpVT));
11298 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
11302 static SDValue LowerCTTZ(SDValue Op, SelectionDAG &DAG) {
11303 EVT VT = Op.getValueType();
11304 unsigned NumBits = VT.getSizeInBits();
11305 DebugLoc dl = Op.getDebugLoc();
11306 Op = Op.getOperand(0);
11308 // Issue a bsf (scan bits forward) which also sets EFLAGS.
11309 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
11310 Op = DAG.getNode(X86ISD::BSF, dl, VTs, Op);
11312 // If src is zero (i.e. bsf sets ZF), returns NumBits.
11315 DAG.getConstant(NumBits, VT),
11316 DAG.getConstant(X86::COND_E, MVT::i8),
11319 return DAG.getNode(X86ISD::CMOV, dl, VT, Ops, array_lengthof(Ops));
11322 // Lower256IntArith - Break a 256-bit integer operation into two new 128-bit
11323 // ones, and then concatenate the result back.
11324 static SDValue Lower256IntArith(SDValue Op, SelectionDAG &DAG) {
11325 EVT VT = Op.getValueType();
11327 assert(VT.is256BitVector() && VT.isInteger() &&
11328 "Unsupported value type for operation");
11330 unsigned NumElems = VT.getVectorNumElements();
11331 DebugLoc dl = Op.getDebugLoc();
11333 // Extract the LHS vectors
11334 SDValue LHS = Op.getOperand(0);
11335 SDValue LHS1 = Extract128BitVector(LHS, 0, DAG, dl);
11336 SDValue LHS2 = Extract128BitVector(LHS, NumElems/2, DAG, dl);
11338 // Extract the RHS vectors
11339 SDValue RHS = Op.getOperand(1);
11340 SDValue RHS1 = Extract128BitVector(RHS, 0, DAG, dl);
11341 SDValue RHS2 = Extract128BitVector(RHS, NumElems/2, DAG, dl);
11343 MVT EltVT = VT.getVectorElementType().getSimpleVT();
11344 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
11346 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT,
11347 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, RHS1),
11348 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, RHS2));
11351 static SDValue LowerADD(SDValue Op, SelectionDAG &DAG) {
11352 assert(Op.getValueType().is256BitVector() &&
11353 Op.getValueType().isInteger() &&
11354 "Only handle AVX 256-bit vector integer operation");
11355 return Lower256IntArith(Op, DAG);
11358 static SDValue LowerSUB(SDValue Op, SelectionDAG &DAG) {
11359 assert(Op.getValueType().is256BitVector() &&
11360 Op.getValueType().isInteger() &&
11361 "Only handle AVX 256-bit vector integer operation");
11362 return Lower256IntArith(Op, DAG);
11365 static SDValue LowerMUL(SDValue Op, const X86Subtarget *Subtarget,
11366 SelectionDAG &DAG) {
11367 DebugLoc dl = Op.getDebugLoc();
11368 EVT VT = Op.getValueType();
11370 // Decompose 256-bit ops into smaller 128-bit ops.
11371 if (VT.is256BitVector() && !Subtarget->hasInt256())
11372 return Lower256IntArith(Op, DAG);
11374 SDValue A = Op.getOperand(0);
11375 SDValue B = Op.getOperand(1);
11377 // Lower v4i32 mul as 2x shuffle, 2x pmuludq, 2x shuffle.
11378 if (VT == MVT::v4i32) {
11379 assert(Subtarget->hasSSE2() && !Subtarget->hasSSE41() &&
11380 "Should not custom lower when pmuldq is available!");
11382 // Extract the odd parts.
11383 const int UnpackMask[] = { 1, -1, 3, -1 };
11384 SDValue Aodds = DAG.getVectorShuffle(VT, dl, A, A, UnpackMask);
11385 SDValue Bodds = DAG.getVectorShuffle(VT, dl, B, B, UnpackMask);
11387 // Multiply the even parts.
11388 SDValue Evens = DAG.getNode(X86ISD::PMULUDQ, dl, MVT::v2i64, A, B);
11389 // Now multiply odd parts.
11390 SDValue Odds = DAG.getNode(X86ISD::PMULUDQ, dl, MVT::v2i64, Aodds, Bodds);
11392 Evens = DAG.getNode(ISD::BITCAST, dl, VT, Evens);
11393 Odds = DAG.getNode(ISD::BITCAST, dl, VT, Odds);
11395 // Merge the two vectors back together with a shuffle. This expands into 2
11397 const int ShufMask[] = { 0, 4, 2, 6 };
11398 return DAG.getVectorShuffle(VT, dl, Evens, Odds, ShufMask);
11401 assert((VT == MVT::v2i64 || VT == MVT::v4i64) &&
11402 "Only know how to lower V2I64/V4I64 multiply");
11404 // Ahi = psrlqi(a, 32);
11405 // Bhi = psrlqi(b, 32);
11407 // AloBlo = pmuludq(a, b);
11408 // AloBhi = pmuludq(a, Bhi);
11409 // AhiBlo = pmuludq(Ahi, b);
11411 // AloBhi = psllqi(AloBhi, 32);
11412 // AhiBlo = psllqi(AhiBlo, 32);
11413 // return AloBlo + AloBhi + AhiBlo;
11415 SDValue ShAmt = DAG.getConstant(32, MVT::i32);
11417 SDValue Ahi = DAG.getNode(X86ISD::VSRLI, dl, VT, A, ShAmt);
11418 SDValue Bhi = DAG.getNode(X86ISD::VSRLI, dl, VT, B, ShAmt);
11420 // Bit cast to 32-bit vectors for MULUDQ
11421 EVT MulVT = (VT == MVT::v2i64) ? MVT::v4i32 : MVT::v8i32;
11422 A = DAG.getNode(ISD::BITCAST, dl, MulVT, A);
11423 B = DAG.getNode(ISD::BITCAST, dl, MulVT, B);
11424 Ahi = DAG.getNode(ISD::BITCAST, dl, MulVT, Ahi);
11425 Bhi = DAG.getNode(ISD::BITCAST, dl, MulVT, Bhi);
11427 SDValue AloBlo = DAG.getNode(X86ISD::PMULUDQ, dl, VT, A, B);
11428 SDValue AloBhi = DAG.getNode(X86ISD::PMULUDQ, dl, VT, A, Bhi);
11429 SDValue AhiBlo = DAG.getNode(X86ISD::PMULUDQ, dl, VT, Ahi, B);
11431 AloBhi = DAG.getNode(X86ISD::VSHLI, dl, VT, AloBhi, ShAmt);
11432 AhiBlo = DAG.getNode(X86ISD::VSHLI, dl, VT, AhiBlo, ShAmt);
11434 SDValue Res = DAG.getNode(ISD::ADD, dl, VT, AloBlo, AloBhi);
11435 return DAG.getNode(ISD::ADD, dl, VT, Res, AhiBlo);
11438 SDValue X86TargetLowering::LowerSDIV(SDValue Op, SelectionDAG &DAG) const {
11439 EVT VT = Op.getValueType();
11440 EVT EltTy = VT.getVectorElementType();
11441 unsigned NumElts = VT.getVectorNumElements();
11442 SDValue N0 = Op.getOperand(0);
11443 DebugLoc dl = Op.getDebugLoc();
11445 // Lower sdiv X, pow2-const.
11446 BuildVectorSDNode *C = dyn_cast<BuildVectorSDNode>(Op.getOperand(1));
11450 APInt SplatValue, SplatUndef;
11451 unsigned MinSplatBits;
11453 if (!C->isConstantSplat(SplatValue, SplatUndef, MinSplatBits, HasAnyUndefs))
11456 if ((SplatValue != 0) &&
11457 (SplatValue.isPowerOf2() || (-SplatValue).isPowerOf2())) {
11458 unsigned lg2 = SplatValue.countTrailingZeros();
11459 // Splat the sign bit.
11460 SDValue Sz = DAG.getConstant(EltTy.getSizeInBits()-1, MVT::i32);
11461 SDValue SGN = getTargetVShiftNode(X86ISD::VSRAI, dl, VT, N0, Sz, DAG);
11462 // Add (N0 < 0) ? abs2 - 1 : 0;
11463 SDValue Amt = DAG.getConstant(EltTy.getSizeInBits() - lg2, MVT::i32);
11464 SDValue SRL = getTargetVShiftNode(X86ISD::VSRLI, dl, VT, SGN, Amt, DAG);
11465 SDValue ADD = DAG.getNode(ISD::ADD, dl, VT, N0, SRL);
11466 SDValue Lg2Amt = DAG.getConstant(lg2, MVT::i32);
11467 SDValue SRA = getTargetVShiftNode(X86ISD::VSRAI, dl, VT, ADD, Lg2Amt, DAG);
11469 // If we're dividing by a positive value, we're done. Otherwise, we must
11470 // negate the result.
11471 if (SplatValue.isNonNegative())
11474 SmallVector<SDValue, 16> V(NumElts, DAG.getConstant(0, EltTy));
11475 SDValue Zero = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], NumElts);
11476 return DAG.getNode(ISD::SUB, dl, VT, Zero, SRA);
11481 static SDValue LowerScalarImmediateShift(SDValue Op, SelectionDAG &DAG,
11482 const X86Subtarget *Subtarget) {
11483 EVT VT = Op.getValueType();
11484 DebugLoc dl = Op.getDebugLoc();
11485 SDValue R = Op.getOperand(0);
11486 SDValue Amt = Op.getOperand(1);
11488 // Optimize shl/srl/sra with constant shift amount.
11489 if (isSplatVector(Amt.getNode())) {
11490 SDValue SclrAmt = Amt->getOperand(0);
11491 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(SclrAmt)) {
11492 uint64_t ShiftAmt = C->getZExtValue();
11494 if (VT == MVT::v2i64 || VT == MVT::v4i32 || VT == MVT::v8i16 ||
11495 (Subtarget->hasInt256() &&
11496 (VT == MVT::v4i64 || VT == MVT::v8i32 || VT == MVT::v16i16))) {
11497 if (Op.getOpcode() == ISD::SHL)
11498 return DAG.getNode(X86ISD::VSHLI, dl, VT, R,
11499 DAG.getConstant(ShiftAmt, MVT::i32));
11500 if (Op.getOpcode() == ISD::SRL)
11501 return DAG.getNode(X86ISD::VSRLI, dl, VT, R,
11502 DAG.getConstant(ShiftAmt, MVT::i32));
11503 if (Op.getOpcode() == ISD::SRA && VT != MVT::v2i64 && VT != MVT::v4i64)
11504 return DAG.getNode(X86ISD::VSRAI, dl, VT, R,
11505 DAG.getConstant(ShiftAmt, MVT::i32));
11508 if (VT == MVT::v16i8) {
11509 if (Op.getOpcode() == ISD::SHL) {
11510 // Make a large shift.
11511 SDValue SHL = DAG.getNode(X86ISD::VSHLI, dl, MVT::v8i16, R,
11512 DAG.getConstant(ShiftAmt, MVT::i32));
11513 SHL = DAG.getNode(ISD::BITCAST, dl, VT, SHL);
11514 // Zero out the rightmost bits.
11515 SmallVector<SDValue, 16> V(16,
11516 DAG.getConstant(uint8_t(-1U << ShiftAmt),
11518 return DAG.getNode(ISD::AND, dl, VT, SHL,
11519 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 16));
11521 if (Op.getOpcode() == ISD::SRL) {
11522 // Make a large shift.
11523 SDValue SRL = DAG.getNode(X86ISD::VSRLI, dl, MVT::v8i16, R,
11524 DAG.getConstant(ShiftAmt, MVT::i32));
11525 SRL = DAG.getNode(ISD::BITCAST, dl, VT, SRL);
11526 // Zero out the leftmost bits.
11527 SmallVector<SDValue, 16> V(16,
11528 DAG.getConstant(uint8_t(-1U) >> ShiftAmt,
11530 return DAG.getNode(ISD::AND, dl, VT, SRL,
11531 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 16));
11533 if (Op.getOpcode() == ISD::SRA) {
11534 if (ShiftAmt == 7) {
11535 // R s>> 7 === R s< 0
11536 SDValue Zeros = getZeroVector(VT, Subtarget, DAG, dl);
11537 return DAG.getNode(X86ISD::PCMPGT, dl, VT, Zeros, R);
11540 // R s>> a === ((R u>> a) ^ m) - m
11541 SDValue Res = DAG.getNode(ISD::SRL, dl, VT, R, Amt);
11542 SmallVector<SDValue, 16> V(16, DAG.getConstant(128 >> ShiftAmt,
11544 SDValue Mask = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 16);
11545 Res = DAG.getNode(ISD::XOR, dl, VT, Res, Mask);
11546 Res = DAG.getNode(ISD::SUB, dl, VT, Res, Mask);
11549 llvm_unreachable("Unknown shift opcode.");
11552 if (Subtarget->hasInt256() && VT == MVT::v32i8) {
11553 if (Op.getOpcode() == ISD::SHL) {
11554 // Make a large shift.
11555 SDValue SHL = DAG.getNode(X86ISD::VSHLI, dl, MVT::v16i16, R,
11556 DAG.getConstant(ShiftAmt, MVT::i32));
11557 SHL = DAG.getNode(ISD::BITCAST, dl, VT, SHL);
11558 // Zero out the rightmost bits.
11559 SmallVector<SDValue, 32> V(32,
11560 DAG.getConstant(uint8_t(-1U << ShiftAmt),
11562 return DAG.getNode(ISD::AND, dl, VT, SHL,
11563 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 32));
11565 if (Op.getOpcode() == ISD::SRL) {
11566 // Make a large shift.
11567 SDValue SRL = DAG.getNode(X86ISD::VSRLI, dl, MVT::v16i16, R,
11568 DAG.getConstant(ShiftAmt, MVT::i32));
11569 SRL = DAG.getNode(ISD::BITCAST, dl, VT, SRL);
11570 // Zero out the leftmost bits.
11571 SmallVector<SDValue, 32> V(32,
11572 DAG.getConstant(uint8_t(-1U) >> ShiftAmt,
11574 return DAG.getNode(ISD::AND, dl, VT, SRL,
11575 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 32));
11577 if (Op.getOpcode() == ISD::SRA) {
11578 if (ShiftAmt == 7) {
11579 // R s>> 7 === R s< 0
11580 SDValue Zeros = getZeroVector(VT, Subtarget, DAG, dl);
11581 return DAG.getNode(X86ISD::PCMPGT, dl, VT, Zeros, R);
11584 // R s>> a === ((R u>> a) ^ m) - m
11585 SDValue Res = DAG.getNode(ISD::SRL, dl, VT, R, Amt);
11586 SmallVector<SDValue, 32> V(32, DAG.getConstant(128 >> ShiftAmt,
11588 SDValue Mask = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 32);
11589 Res = DAG.getNode(ISD::XOR, dl, VT, Res, Mask);
11590 Res = DAG.getNode(ISD::SUB, dl, VT, Res, Mask);
11593 llvm_unreachable("Unknown shift opcode.");
11598 // Special case in 32-bit mode, where i64 is expanded into high and low parts.
11599 if (!Subtarget->is64Bit() &&
11600 (VT == MVT::v2i64 || (Subtarget->hasInt256() && VT == MVT::v4i64)) &&
11601 Amt.getOpcode() == ISD::BITCAST &&
11602 Amt.getOperand(0).getOpcode() == ISD::BUILD_VECTOR) {
11603 Amt = Amt.getOperand(0);
11604 unsigned Ratio = Amt.getValueType().getVectorNumElements() /
11605 VT.getVectorNumElements();
11606 unsigned RatioInLog2 = Log2_32_Ceil(Ratio);
11607 uint64_t ShiftAmt = 0;
11608 for (unsigned i = 0; i != Ratio; ++i) {
11609 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Amt.getOperand(i));
11613 ShiftAmt |= C->getZExtValue() << (i * (1 << (6 - RatioInLog2)));
11615 // Check remaining shift amounts.
11616 for (unsigned i = Ratio; i != Amt.getNumOperands(); i += Ratio) {
11617 uint64_t ShAmt = 0;
11618 for (unsigned j = 0; j != Ratio; ++j) {
11619 ConstantSDNode *C =
11620 dyn_cast<ConstantSDNode>(Amt.getOperand(i + j));
11624 ShAmt |= C->getZExtValue() << (j * (1 << (6 - RatioInLog2)));
11626 if (ShAmt != ShiftAmt)
11629 switch (Op.getOpcode()) {
11631 llvm_unreachable("Unknown shift opcode!");
11633 return DAG.getNode(X86ISD::VSHLI, dl, VT, R,
11634 DAG.getConstant(ShiftAmt, MVT::i32));
11636 return DAG.getNode(X86ISD::VSRLI, dl, VT, R,
11637 DAG.getConstant(ShiftAmt, MVT::i32));
11639 return DAG.getNode(X86ISD::VSRAI, dl, VT, R,
11640 DAG.getConstant(ShiftAmt, MVT::i32));
11647 static SDValue LowerScalarVariableShift(SDValue Op, SelectionDAG &DAG,
11648 const X86Subtarget* Subtarget) {
11649 EVT VT = Op.getValueType();
11650 DebugLoc dl = Op.getDebugLoc();
11651 SDValue R = Op.getOperand(0);
11652 SDValue Amt = Op.getOperand(1);
11654 if ((VT == MVT::v2i64 && Op.getOpcode() != ISD::SRA) ||
11655 VT == MVT::v4i32 || VT == MVT::v8i16 ||
11656 (Subtarget->hasInt256() &&
11657 ((VT == MVT::v4i64 && Op.getOpcode() != ISD::SRA) ||
11658 VT == MVT::v8i32 || VT == MVT::v16i16))) {
11660 EVT EltVT = VT.getVectorElementType();
11662 if (Amt.getOpcode() == ISD::BUILD_VECTOR) {
11663 unsigned NumElts = VT.getVectorNumElements();
11665 for (i = 0; i != NumElts; ++i) {
11666 if (Amt.getOperand(i).getOpcode() == ISD::UNDEF)
11670 for (j = i; j != NumElts; ++j) {
11671 SDValue Arg = Amt.getOperand(j);
11672 if (Arg.getOpcode() == ISD::UNDEF) continue;
11673 if (Arg != Amt.getOperand(i))
11676 if (i != NumElts && j == NumElts)
11677 BaseShAmt = Amt.getOperand(i);
11679 if (Amt.getOpcode() == ISD::EXTRACT_SUBVECTOR)
11680 Amt = Amt.getOperand(0);
11681 if (Amt.getOpcode() == ISD::VECTOR_SHUFFLE &&
11682 cast<ShuffleVectorSDNode>(Amt)->isSplat()) {
11683 SDValue InVec = Amt.getOperand(0);
11684 if (InVec.getOpcode() == ISD::BUILD_VECTOR) {
11685 unsigned NumElts = InVec.getValueType().getVectorNumElements();
11687 for (; i != NumElts; ++i) {
11688 SDValue Arg = InVec.getOperand(i);
11689 if (Arg.getOpcode() == ISD::UNDEF) continue;
11693 } else if (InVec.getOpcode() == ISD::INSERT_VECTOR_ELT) {
11694 if (ConstantSDNode *C =
11695 dyn_cast<ConstantSDNode>(InVec.getOperand(2))) {
11696 unsigned SplatIdx =
11697 cast<ShuffleVectorSDNode>(Amt)->getSplatIndex();
11698 if (C->getZExtValue() == SplatIdx)
11699 BaseShAmt = InVec.getOperand(1);
11702 if (BaseShAmt.getNode() == 0)
11703 BaseShAmt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, Amt,
11704 DAG.getIntPtrConstant(0));
11708 if (BaseShAmt.getNode()) {
11709 if (EltVT.bitsGT(MVT::i32))
11710 BaseShAmt = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, BaseShAmt);
11711 else if (EltVT.bitsLT(MVT::i32))
11712 BaseShAmt = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, BaseShAmt);
11714 switch (Op.getOpcode()) {
11716 llvm_unreachable("Unknown shift opcode!");
11718 switch (VT.getSimpleVT().SimpleTy) {
11719 default: return SDValue();
11726 return getTargetVShiftNode(X86ISD::VSHLI, dl, VT, R, BaseShAmt, DAG);
11729 switch (VT.getSimpleVT().SimpleTy) {
11730 default: return SDValue();
11735 return getTargetVShiftNode(X86ISD::VSRAI, dl, VT, R, BaseShAmt, DAG);
11738 switch (VT.getSimpleVT().SimpleTy) {
11739 default: return SDValue();
11746 return getTargetVShiftNode(X86ISD::VSRLI, dl, VT, R, BaseShAmt, DAG);
11752 // Special case in 32-bit mode, where i64 is expanded into high and low parts.
11753 if (!Subtarget->is64Bit() &&
11754 (VT == MVT::v2i64 || (Subtarget->hasInt256() && VT == MVT::v4i64)) &&
11755 Amt.getOpcode() == ISD::BITCAST &&
11756 Amt.getOperand(0).getOpcode() == ISD::BUILD_VECTOR) {
11757 Amt = Amt.getOperand(0);
11758 unsigned Ratio = Amt.getValueType().getVectorNumElements() /
11759 VT.getVectorNumElements();
11760 std::vector<SDValue> Vals(Ratio);
11761 for (unsigned i = 0; i != Ratio; ++i)
11762 Vals[i] = Amt.getOperand(i);
11763 for (unsigned i = Ratio; i != Amt.getNumOperands(); i += Ratio) {
11764 for (unsigned j = 0; j != Ratio; ++j)
11765 if (Vals[j] != Amt.getOperand(i + j))
11768 switch (Op.getOpcode()) {
11770 llvm_unreachable("Unknown shift opcode!");
11772 return DAG.getNode(X86ISD::VSHL, dl, VT, R, Op.getOperand(1));
11774 return DAG.getNode(X86ISD::VSRL, dl, VT, R, Op.getOperand(1));
11776 return DAG.getNode(X86ISD::VSRA, dl, VT, R, Op.getOperand(1));
11783 SDValue X86TargetLowering::LowerShift(SDValue Op, SelectionDAG &DAG) const {
11785 EVT VT = Op.getValueType();
11786 DebugLoc dl = Op.getDebugLoc();
11787 SDValue R = Op.getOperand(0);
11788 SDValue Amt = Op.getOperand(1);
11791 if (!Subtarget->hasSSE2())
11794 V = LowerScalarImmediateShift(Op, DAG, Subtarget);
11798 V = LowerScalarVariableShift(Op, DAG, Subtarget);
11802 // AVX2 has VPSLLV/VPSRAV/VPSRLV.
11803 if (Subtarget->hasInt256()) {
11804 if (Op.getOpcode() == ISD::SRL &&
11805 (VT == MVT::v2i64 || VT == MVT::v4i32 ||
11806 VT == MVT::v4i64 || VT == MVT::v8i32))
11808 if (Op.getOpcode() == ISD::SHL &&
11809 (VT == MVT::v2i64 || VT == MVT::v4i32 ||
11810 VT == MVT::v4i64 || VT == MVT::v8i32))
11812 if (Op.getOpcode() == ISD::SRA && (VT == MVT::v4i32 || VT == MVT::v8i32))
11816 // Lower SHL with variable shift amount.
11817 if (VT == MVT::v4i32 && Op->getOpcode() == ISD::SHL) {
11818 Op = DAG.getNode(ISD::SHL, dl, VT, Amt, DAG.getConstant(23, VT));
11820 Op = DAG.getNode(ISD::ADD, dl, VT, Op, DAG.getConstant(0x3f800000U, VT));
11821 Op = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, Op);
11822 Op = DAG.getNode(ISD::FP_TO_SINT, dl, VT, Op);
11823 return DAG.getNode(ISD::MUL, dl, VT, Op, R);
11825 if (VT == MVT::v16i8 && Op->getOpcode() == ISD::SHL) {
11826 assert(Subtarget->hasSSE2() && "Need SSE2 for pslli/pcmpeq.");
11829 Op = DAG.getNode(ISD::SHL, dl, VT, Amt, DAG.getConstant(5, VT));
11830 Op = DAG.getNode(ISD::BITCAST, dl, VT, Op);
11832 // Turn 'a' into a mask suitable for VSELECT
11833 SDValue VSelM = DAG.getConstant(0x80, VT);
11834 SDValue OpVSel = DAG.getNode(ISD::AND, dl, VT, VSelM, Op);
11835 OpVSel = DAG.getNode(X86ISD::PCMPEQ, dl, VT, OpVSel, VSelM);
11837 SDValue CM1 = DAG.getConstant(0x0f, VT);
11838 SDValue CM2 = DAG.getConstant(0x3f, VT);
11840 // r = VSELECT(r, psllw(r & (char16)15, 4), a);
11841 SDValue M = DAG.getNode(ISD::AND, dl, VT, R, CM1);
11842 M = getTargetVShiftNode(X86ISD::VSHLI, dl, MVT::v8i16, M,
11843 DAG.getConstant(4, MVT::i32), DAG);
11844 M = DAG.getNode(ISD::BITCAST, dl, VT, M);
11845 R = DAG.getNode(ISD::VSELECT, dl, VT, OpVSel, M, R);
11848 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Op);
11849 OpVSel = DAG.getNode(ISD::AND, dl, VT, VSelM, Op);
11850 OpVSel = DAG.getNode(X86ISD::PCMPEQ, dl, VT, OpVSel, VSelM);
11852 // r = VSELECT(r, psllw(r & (char16)63, 2), a);
11853 M = DAG.getNode(ISD::AND, dl, VT, R, CM2);
11854 M = getTargetVShiftNode(X86ISD::VSHLI, dl, MVT::v8i16, M,
11855 DAG.getConstant(2, MVT::i32), DAG);
11856 M = DAG.getNode(ISD::BITCAST, dl, VT, M);
11857 R = DAG.getNode(ISD::VSELECT, dl, VT, OpVSel, M, R);
11860 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Op);
11861 OpVSel = DAG.getNode(ISD::AND, dl, VT, VSelM, Op);
11862 OpVSel = DAG.getNode(X86ISD::PCMPEQ, dl, VT, OpVSel, VSelM);
11864 // return VSELECT(r, r+r, a);
11865 R = DAG.getNode(ISD::VSELECT, dl, VT, OpVSel,
11866 DAG.getNode(ISD::ADD, dl, VT, R, R), R);
11870 // Decompose 256-bit shifts into smaller 128-bit shifts.
11871 if (VT.is256BitVector()) {
11872 unsigned NumElems = VT.getVectorNumElements();
11873 MVT EltVT = VT.getVectorElementType().getSimpleVT();
11874 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
11876 // Extract the two vectors
11877 SDValue V1 = Extract128BitVector(R, 0, DAG, dl);
11878 SDValue V2 = Extract128BitVector(R, NumElems/2, DAG, dl);
11880 // Recreate the shift amount vectors
11881 SDValue Amt1, Amt2;
11882 if (Amt.getOpcode() == ISD::BUILD_VECTOR) {
11883 // Constant shift amount
11884 SmallVector<SDValue, 4> Amt1Csts;
11885 SmallVector<SDValue, 4> Amt2Csts;
11886 for (unsigned i = 0; i != NumElems/2; ++i)
11887 Amt1Csts.push_back(Amt->getOperand(i));
11888 for (unsigned i = NumElems/2; i != NumElems; ++i)
11889 Amt2Csts.push_back(Amt->getOperand(i));
11891 Amt1 = DAG.getNode(ISD::BUILD_VECTOR, dl, NewVT,
11892 &Amt1Csts[0], NumElems/2);
11893 Amt2 = DAG.getNode(ISD::BUILD_VECTOR, dl, NewVT,
11894 &Amt2Csts[0], NumElems/2);
11896 // Variable shift amount
11897 Amt1 = Extract128BitVector(Amt, 0, DAG, dl);
11898 Amt2 = Extract128BitVector(Amt, NumElems/2, DAG, dl);
11901 // Issue new vector shifts for the smaller types
11902 V1 = DAG.getNode(Op.getOpcode(), dl, NewVT, V1, Amt1);
11903 V2 = DAG.getNode(Op.getOpcode(), dl, NewVT, V2, Amt2);
11905 // Concatenate the result back
11906 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, V1, V2);
11912 static SDValue LowerXALUO(SDValue Op, SelectionDAG &DAG) {
11913 // Lower the "add/sub/mul with overflow" instruction into a regular ins plus
11914 // a "setcc" instruction that checks the overflow flag. The "brcond" lowering
11915 // looks for this combo and may remove the "setcc" instruction if the "setcc"
11916 // has only one use.
11917 SDNode *N = Op.getNode();
11918 SDValue LHS = N->getOperand(0);
11919 SDValue RHS = N->getOperand(1);
11920 unsigned BaseOp = 0;
11922 DebugLoc DL = Op.getDebugLoc();
11923 switch (Op.getOpcode()) {
11924 default: llvm_unreachable("Unknown ovf instruction!");
11926 // A subtract of one will be selected as a INC. Note that INC doesn't
11927 // set CF, so we can't do this for UADDO.
11928 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS))
11930 BaseOp = X86ISD::INC;
11931 Cond = X86::COND_O;
11934 BaseOp = X86ISD::ADD;
11935 Cond = X86::COND_O;
11938 BaseOp = X86ISD::ADD;
11939 Cond = X86::COND_B;
11942 // A subtract of one will be selected as a DEC. Note that DEC doesn't
11943 // set CF, so we can't do this for USUBO.
11944 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS))
11946 BaseOp = X86ISD::DEC;
11947 Cond = X86::COND_O;
11950 BaseOp = X86ISD::SUB;
11951 Cond = X86::COND_O;
11954 BaseOp = X86ISD::SUB;
11955 Cond = X86::COND_B;
11958 BaseOp = X86ISD::SMUL;
11959 Cond = X86::COND_O;
11961 case ISD::UMULO: { // i64, i8 = umulo lhs, rhs --> i64, i64, i32 umul lhs,rhs
11962 SDVTList VTs = DAG.getVTList(N->getValueType(0), N->getValueType(0),
11964 SDValue Sum = DAG.getNode(X86ISD::UMUL, DL, VTs, LHS, RHS);
11967 DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
11968 DAG.getConstant(X86::COND_O, MVT::i32),
11969 SDValue(Sum.getNode(), 2));
11971 return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), Sum, SetCC);
11975 // Also sets EFLAGS.
11976 SDVTList VTs = DAG.getVTList(N->getValueType(0), MVT::i32);
11977 SDValue Sum = DAG.getNode(BaseOp, DL, VTs, LHS, RHS);
11980 DAG.getNode(X86ISD::SETCC, DL, N->getValueType(1),
11981 DAG.getConstant(Cond, MVT::i32),
11982 SDValue(Sum.getNode(), 1));
11984 return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), Sum, SetCC);
11987 SDValue X86TargetLowering::LowerSIGN_EXTEND_INREG(SDValue Op,
11988 SelectionDAG &DAG) const {
11989 DebugLoc dl = Op.getDebugLoc();
11990 EVT ExtraVT = cast<VTSDNode>(Op.getOperand(1))->getVT();
11991 EVT VT = Op.getValueType();
11993 if (!Subtarget->hasSSE2() || !VT.isVector())
11996 unsigned BitsDiff = VT.getScalarType().getSizeInBits() -
11997 ExtraVT.getScalarType().getSizeInBits();
11998 SDValue ShAmt = DAG.getConstant(BitsDiff, MVT::i32);
12000 switch (VT.getSimpleVT().SimpleTy) {
12001 default: return SDValue();
12004 if (!Subtarget->hasFp256())
12006 if (!Subtarget->hasInt256()) {
12007 // needs to be split
12008 unsigned NumElems = VT.getVectorNumElements();
12010 // Extract the LHS vectors
12011 SDValue LHS = Op.getOperand(0);
12012 SDValue LHS1 = Extract128BitVector(LHS, 0, DAG, dl);
12013 SDValue LHS2 = Extract128BitVector(LHS, NumElems/2, DAG, dl);
12015 MVT EltVT = VT.getVectorElementType().getSimpleVT();
12016 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
12018 EVT ExtraEltVT = ExtraVT.getVectorElementType();
12019 unsigned ExtraNumElems = ExtraVT.getVectorNumElements();
12020 ExtraVT = EVT::getVectorVT(*DAG.getContext(), ExtraEltVT,
12022 SDValue Extra = DAG.getValueType(ExtraVT);
12024 LHS1 = DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, Extra);
12025 LHS2 = DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, Extra);
12027 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, LHS1, LHS2);
12032 // (sext (vzext x)) -> (vsext x)
12033 SDValue Op0 = Op.getOperand(0);
12034 SDValue Op00 = Op0.getOperand(0);
12036 // Hopefully, this VECTOR_SHUFFLE is just a VZEXT.
12037 if (Op0.getOpcode() == ISD::BITCAST &&
12038 Op00.getOpcode() == ISD::VECTOR_SHUFFLE)
12039 Tmp1 = LowerVectorIntExtend(Op00, DAG);
12040 if (Tmp1.getNode()) {
12041 SDValue Tmp1Op0 = Tmp1.getOperand(0);
12042 assert(Tmp1Op0.getOpcode() == X86ISD::VZEXT &&
12043 "This optimization is invalid without a VZEXT.");
12044 return DAG.getNode(X86ISD::VSEXT, dl, VT, Tmp1Op0.getOperand(0));
12047 // If the above didn't work, then just use Shift-Left + Shift-Right.
12048 Tmp1 = getTargetVShiftNode(X86ISD::VSHLI, dl, VT, Op0, ShAmt, DAG);
12049 return getTargetVShiftNode(X86ISD::VSRAI, dl, VT, Tmp1, ShAmt, DAG);
12054 static SDValue LowerMEMBARRIER(SDValue Op, const X86Subtarget *Subtarget,
12055 SelectionDAG &DAG) {
12056 DebugLoc dl = Op.getDebugLoc();
12058 // Go ahead and emit the fence on x86-64 even if we asked for no-sse2.
12059 // There isn't any reason to disable it if the target processor supports it.
12060 if (!Subtarget->hasSSE2() && !Subtarget->is64Bit()) {
12061 SDValue Chain = Op.getOperand(0);
12062 SDValue Zero = DAG.getConstant(0, MVT::i32);
12064 DAG.getRegister(X86::ESP, MVT::i32), // Base
12065 DAG.getTargetConstant(1, MVT::i8), // Scale
12066 DAG.getRegister(0, MVT::i32), // Index
12067 DAG.getTargetConstant(0, MVT::i32), // Disp
12068 DAG.getRegister(0, MVT::i32), // Segment.
12073 DAG.getMachineNode(X86::OR32mrLocked, dl, MVT::Other, Ops,
12074 array_lengthof(Ops));
12075 return SDValue(Res, 0);
12078 unsigned isDev = cast<ConstantSDNode>(Op.getOperand(5))->getZExtValue();
12080 return DAG.getNode(X86ISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0));
12082 unsigned Op1 = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
12083 unsigned Op2 = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue();
12084 unsigned Op3 = cast<ConstantSDNode>(Op.getOperand(3))->getZExtValue();
12085 unsigned Op4 = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue();
12087 // def : Pat<(membarrier (i8 0), (i8 0), (i8 0), (i8 1), (i8 1)), (SFENCE)>;
12088 if (!Op1 && !Op2 && !Op3 && Op4)
12089 return DAG.getNode(X86ISD::SFENCE, dl, MVT::Other, Op.getOperand(0));
12091 // def : Pat<(membarrier (i8 1), (i8 0), (i8 0), (i8 0), (i8 1)), (LFENCE)>;
12092 if (Op1 && !Op2 && !Op3 && !Op4)
12093 return DAG.getNode(X86ISD::LFENCE, dl, MVT::Other, Op.getOperand(0));
12095 // def : Pat<(membarrier (i8 imm), (i8 imm), (i8 imm), (i8 imm), (i8 1)),
12097 return DAG.getNode(X86ISD::MFENCE, dl, MVT::Other, Op.getOperand(0));
12100 static SDValue LowerATOMIC_FENCE(SDValue Op, const X86Subtarget *Subtarget,
12101 SelectionDAG &DAG) {
12102 DebugLoc dl = Op.getDebugLoc();
12103 AtomicOrdering FenceOrdering = static_cast<AtomicOrdering>(
12104 cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue());
12105 SynchronizationScope FenceScope = static_cast<SynchronizationScope>(
12106 cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue());
12108 // The only fence that needs an instruction is a sequentially-consistent
12109 // cross-thread fence.
12110 if (FenceOrdering == SequentiallyConsistent && FenceScope == CrossThread) {
12111 // Use mfence if we have SSE2 or we're on x86-64 (even if we asked for
12112 // no-sse2). There isn't any reason to disable it if the target processor
12114 if (Subtarget->hasSSE2() || Subtarget->is64Bit())
12115 return DAG.getNode(X86ISD::MFENCE, dl, MVT::Other, Op.getOperand(0));
12117 SDValue Chain = Op.getOperand(0);
12118 SDValue Zero = DAG.getConstant(0, MVT::i32);
12120 DAG.getRegister(X86::ESP, MVT::i32), // Base
12121 DAG.getTargetConstant(1, MVT::i8), // Scale
12122 DAG.getRegister(0, MVT::i32), // Index
12123 DAG.getTargetConstant(0, MVT::i32), // Disp
12124 DAG.getRegister(0, MVT::i32), // Segment.
12129 DAG.getMachineNode(X86::OR32mrLocked, dl, MVT::Other, Ops,
12130 array_lengthof(Ops));
12131 return SDValue(Res, 0);
12134 // MEMBARRIER is a compiler barrier; it codegens to a no-op.
12135 return DAG.getNode(X86ISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0));
12138 static SDValue LowerCMP_SWAP(SDValue Op, const X86Subtarget *Subtarget,
12139 SelectionDAG &DAG) {
12140 EVT T = Op.getValueType();
12141 DebugLoc DL = Op.getDebugLoc();
12144 switch(T.getSimpleVT().SimpleTy) {
12145 default: llvm_unreachable("Invalid value type!");
12146 case MVT::i8: Reg = X86::AL; size = 1; break;
12147 case MVT::i16: Reg = X86::AX; size = 2; break;
12148 case MVT::i32: Reg = X86::EAX; size = 4; break;
12150 assert(Subtarget->is64Bit() && "Node not type legal!");
12151 Reg = X86::RAX; size = 8;
12154 SDValue cpIn = DAG.getCopyToReg(Op.getOperand(0), DL, Reg,
12155 Op.getOperand(2), SDValue());
12156 SDValue Ops[] = { cpIn.getValue(0),
12159 DAG.getTargetConstant(size, MVT::i8),
12160 cpIn.getValue(1) };
12161 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
12162 MachineMemOperand *MMO = cast<AtomicSDNode>(Op)->getMemOperand();
12163 SDValue Result = DAG.getMemIntrinsicNode(X86ISD::LCMPXCHG_DAG, DL, Tys,
12166 DAG.getCopyFromReg(Result.getValue(0), DL, Reg, T, Result.getValue(1));
12170 static SDValue LowerREADCYCLECOUNTER(SDValue Op, const X86Subtarget *Subtarget,
12171 SelectionDAG &DAG) {
12172 assert(Subtarget->is64Bit() && "Result not type legalized?");
12173 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
12174 SDValue TheChain = Op.getOperand(0);
12175 DebugLoc dl = Op.getDebugLoc();
12176 SDValue rd = DAG.getNode(X86ISD::RDTSC_DAG, dl, Tys, &TheChain, 1);
12177 SDValue rax = DAG.getCopyFromReg(rd, dl, X86::RAX, MVT::i64, rd.getValue(1));
12178 SDValue rdx = DAG.getCopyFromReg(rax.getValue(1), dl, X86::RDX, MVT::i64,
12180 SDValue Tmp = DAG.getNode(ISD::SHL, dl, MVT::i64, rdx,
12181 DAG.getConstant(32, MVT::i8));
12183 DAG.getNode(ISD::OR, dl, MVT::i64, rax, Tmp),
12186 return DAG.getMergeValues(Ops, 2, dl);
12189 SDValue X86TargetLowering::LowerBITCAST(SDValue Op, SelectionDAG &DAG) const {
12190 EVT SrcVT = Op.getOperand(0).getValueType();
12191 EVT DstVT = Op.getValueType();
12192 assert(Subtarget->is64Bit() && !Subtarget->hasSSE2() &&
12193 Subtarget->hasMMX() && "Unexpected custom BITCAST");
12194 assert((DstVT == MVT::i64 ||
12195 (DstVT.isVector() && DstVT.getSizeInBits()==64)) &&
12196 "Unexpected custom BITCAST");
12197 // i64 <=> MMX conversions are Legal.
12198 if (SrcVT==MVT::i64 && DstVT.isVector())
12200 if (DstVT==MVT::i64 && SrcVT.isVector())
12202 // MMX <=> MMX conversions are Legal.
12203 if (SrcVT.isVector() && DstVT.isVector())
12205 // All other conversions need to be expanded.
12209 static SDValue LowerLOAD_SUB(SDValue Op, SelectionDAG &DAG) {
12210 SDNode *Node = Op.getNode();
12211 DebugLoc dl = Node->getDebugLoc();
12212 EVT T = Node->getValueType(0);
12213 SDValue negOp = DAG.getNode(ISD::SUB, dl, T,
12214 DAG.getConstant(0, T), Node->getOperand(2));
12215 return DAG.getAtomic(ISD::ATOMIC_LOAD_ADD, dl,
12216 cast<AtomicSDNode>(Node)->getMemoryVT(),
12217 Node->getOperand(0),
12218 Node->getOperand(1), negOp,
12219 cast<AtomicSDNode>(Node)->getSrcValue(),
12220 cast<AtomicSDNode>(Node)->getAlignment(),
12221 cast<AtomicSDNode>(Node)->getOrdering(),
12222 cast<AtomicSDNode>(Node)->getSynchScope());
12225 static SDValue LowerATOMIC_STORE(SDValue Op, SelectionDAG &DAG) {
12226 SDNode *Node = Op.getNode();
12227 DebugLoc dl = Node->getDebugLoc();
12228 EVT VT = cast<AtomicSDNode>(Node)->getMemoryVT();
12230 // Convert seq_cst store -> xchg
12231 // Convert wide store -> swap (-> cmpxchg8b/cmpxchg16b)
12232 // FIXME: On 32-bit, store -> fist or movq would be more efficient
12233 // (The only way to get a 16-byte store is cmpxchg16b)
12234 // FIXME: 16-byte ATOMIC_SWAP isn't actually hooked up at the moment.
12235 if (cast<AtomicSDNode>(Node)->getOrdering() == SequentiallyConsistent ||
12236 !DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
12237 SDValue Swap = DAG.getAtomic(ISD::ATOMIC_SWAP, dl,
12238 cast<AtomicSDNode>(Node)->getMemoryVT(),
12239 Node->getOperand(0),
12240 Node->getOperand(1), Node->getOperand(2),
12241 cast<AtomicSDNode>(Node)->getMemOperand(),
12242 cast<AtomicSDNode>(Node)->getOrdering(),
12243 cast<AtomicSDNode>(Node)->getSynchScope());
12244 return Swap.getValue(1);
12246 // Other atomic stores have a simple pattern.
12250 static SDValue LowerADDC_ADDE_SUBC_SUBE(SDValue Op, SelectionDAG &DAG) {
12251 EVT VT = Op.getNode()->getValueType(0);
12253 // Let legalize expand this if it isn't a legal type yet.
12254 if (!DAG.getTargetLoweringInfo().isTypeLegal(VT))
12257 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
12260 bool ExtraOp = false;
12261 switch (Op.getOpcode()) {
12262 default: llvm_unreachable("Invalid code");
12263 case ISD::ADDC: Opc = X86ISD::ADD; break;
12264 case ISD::ADDE: Opc = X86ISD::ADC; ExtraOp = true; break;
12265 case ISD::SUBC: Opc = X86ISD::SUB; break;
12266 case ISD::SUBE: Opc = X86ISD::SBB; ExtraOp = true; break;
12270 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
12272 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
12273 Op.getOperand(1), Op.getOperand(2));
12276 SDValue X86TargetLowering::LowerFSINCOS(SDValue Op, SelectionDAG &DAG) const {
12277 assert(Subtarget->isTargetDarwin() && Subtarget->is64Bit());
12279 // For MacOSX, we want to call an alternative entry point: __sincos_stret,
12280 // which returns the values in two XMM registers.
12281 DebugLoc dl = Op.getDebugLoc();
12282 SDValue Arg = Op.getOperand(0);
12283 EVT ArgVT = Arg.getValueType();
12284 Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
12287 ArgListEntry Entry;
12291 Entry.isSExt = false;
12292 Entry.isZExt = false;
12293 Args.push_back(Entry);
12295 // Only optimize x86_64 for now. i386 is a bit messy. For f32,
12296 // the small struct {f32, f32} is returned in (eax, edx). For f64,
12297 // the results are returned via SRet in memory.
12298 const char *LibcallName = (ArgVT == MVT::f64)
12299 ? "__sincos_stret" : "__sincosf_stret";
12300 SDValue Callee = DAG.getExternalSymbol(LibcallName, getPointerTy());
12302 StructType *RetTy = StructType::get(ArgTy, ArgTy, NULL);
12304 CallLoweringInfo CLI(DAG.getEntryNode(), RetTy,
12305 false, false, false, false, 0,
12306 CallingConv::C, /*isTaillCall=*/false,
12307 /*doesNotRet=*/false, /*isReturnValueUsed*/true,
12308 Callee, Args, DAG, dl);
12309 std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI);
12310 return CallResult.first;
12313 /// LowerOperation - Provide custom lowering hooks for some operations.
12315 SDValue X86TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
12316 switch (Op.getOpcode()) {
12317 default: llvm_unreachable("Should not custom lower this!");
12318 case ISD::SIGN_EXTEND_INREG: return LowerSIGN_EXTEND_INREG(Op,DAG);
12319 case ISD::MEMBARRIER: return LowerMEMBARRIER(Op, Subtarget, DAG);
12320 case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, Subtarget, DAG);
12321 case ISD::ATOMIC_CMP_SWAP: return LowerCMP_SWAP(Op, Subtarget, DAG);
12322 case ISD::ATOMIC_LOAD_SUB: return LowerLOAD_SUB(Op,DAG);
12323 case ISD::ATOMIC_STORE: return LowerATOMIC_STORE(Op,DAG);
12324 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG);
12325 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
12326 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
12327 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
12328 case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
12329 case ISD::EXTRACT_SUBVECTOR: return LowerEXTRACT_SUBVECTOR(Op,Subtarget,DAG);
12330 case ISD::INSERT_SUBVECTOR: return LowerINSERT_SUBVECTOR(Op, Subtarget,DAG);
12331 case ISD::SCALAR_TO_VECTOR: return LowerSCALAR_TO_VECTOR(Op, DAG);
12332 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
12333 case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
12334 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
12335 case ISD::ExternalSymbol: return LowerExternalSymbol(Op, DAG);
12336 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
12337 case ISD::SHL_PARTS:
12338 case ISD::SRA_PARTS:
12339 case ISD::SRL_PARTS: return LowerShiftParts(Op, DAG);
12340 case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
12341 case ISD::UINT_TO_FP: return LowerUINT_TO_FP(Op, DAG);
12342 case ISD::TRUNCATE: return LowerTRUNCATE(Op, DAG);
12343 case ISD::ZERO_EXTEND: return LowerZERO_EXTEND(Op, DAG);
12344 case ISD::SIGN_EXTEND: return LowerSIGN_EXTEND(Op, DAG);
12345 case ISD::ANY_EXTEND: return LowerANY_EXTEND(Op, DAG);
12346 case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
12347 case ISD::FP_TO_UINT: return LowerFP_TO_UINT(Op, DAG);
12348 case ISD::FP_EXTEND: return LowerFP_EXTEND(Op, DAG);
12349 case ISD::FABS: return LowerFABS(Op, DAG);
12350 case ISD::FNEG: return LowerFNEG(Op, DAG);
12351 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
12352 case ISD::FGETSIGN: return LowerFGETSIGN(Op, DAG);
12353 case ISD::SETCC: return LowerSETCC(Op, DAG);
12354 case ISD::SELECT: return LowerSELECT(Op, DAG);
12355 case ISD::BRCOND: return LowerBRCOND(Op, DAG);
12356 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
12357 case ISD::VASTART: return LowerVASTART(Op, DAG);
12358 case ISD::VAARG: return LowerVAARG(Op, DAG);
12359 case ISD::VACOPY: return LowerVACOPY(Op, Subtarget, DAG);
12360 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
12361 case ISD::INTRINSIC_W_CHAIN: return LowerINTRINSIC_W_CHAIN(Op, DAG);
12362 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
12363 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
12364 case ISD::FRAME_TO_ARGS_OFFSET:
12365 return LowerFRAME_TO_ARGS_OFFSET(Op, DAG);
12366 case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
12367 case ISD::EH_RETURN: return LowerEH_RETURN(Op, DAG);
12368 case ISD::EH_SJLJ_SETJMP: return lowerEH_SJLJ_SETJMP(Op, DAG);
12369 case ISD::EH_SJLJ_LONGJMP: return lowerEH_SJLJ_LONGJMP(Op, DAG);
12370 case ISD::INIT_TRAMPOLINE: return LowerINIT_TRAMPOLINE(Op, DAG);
12371 case ISD::ADJUST_TRAMPOLINE: return LowerADJUST_TRAMPOLINE(Op, DAG);
12372 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
12373 case ISD::CTLZ: return LowerCTLZ(Op, DAG);
12374 case ISD::CTLZ_ZERO_UNDEF: return LowerCTLZ_ZERO_UNDEF(Op, DAG);
12375 case ISD::CTTZ: return LowerCTTZ(Op, DAG);
12376 case ISD::MUL: return LowerMUL(Op, Subtarget, DAG);
12379 case ISD::SHL: return LowerShift(Op, DAG);
12385 case ISD::UMULO: return LowerXALUO(Op, DAG);
12386 case ISD::READCYCLECOUNTER: return LowerREADCYCLECOUNTER(Op, Subtarget,DAG);
12387 case ISD::BITCAST: return LowerBITCAST(Op, DAG);
12391 case ISD::SUBE: return LowerADDC_ADDE_SUBC_SUBE(Op, DAG);
12392 case ISD::ADD: return LowerADD(Op, DAG);
12393 case ISD::SUB: return LowerSUB(Op, DAG);
12394 case ISD::SDIV: return LowerSDIV(Op, DAG);
12395 case ISD::FSINCOS: return LowerFSINCOS(Op, DAG);
12399 static void ReplaceATOMIC_LOAD(SDNode *Node,
12400 SmallVectorImpl<SDValue> &Results,
12401 SelectionDAG &DAG) {
12402 DebugLoc dl = Node->getDebugLoc();
12403 EVT VT = cast<AtomicSDNode>(Node)->getMemoryVT();
12405 // Convert wide load -> cmpxchg8b/cmpxchg16b
12406 // FIXME: On 32-bit, load -> fild or movq would be more efficient
12407 // (The only way to get a 16-byte load is cmpxchg16b)
12408 // FIXME: 16-byte ATOMIC_CMP_SWAP isn't actually hooked up at the moment.
12409 SDValue Zero = DAG.getConstant(0, VT);
12410 SDValue Swap = DAG.getAtomic(ISD::ATOMIC_CMP_SWAP, dl, VT,
12411 Node->getOperand(0),
12412 Node->getOperand(1), Zero, Zero,
12413 cast<AtomicSDNode>(Node)->getMemOperand(),
12414 cast<AtomicSDNode>(Node)->getOrdering(),
12415 cast<AtomicSDNode>(Node)->getSynchScope());
12416 Results.push_back(Swap.getValue(0));
12417 Results.push_back(Swap.getValue(1));
12421 ReplaceATOMIC_BINARY_64(SDNode *Node, SmallVectorImpl<SDValue>&Results,
12422 SelectionDAG &DAG, unsigned NewOp) {
12423 DebugLoc dl = Node->getDebugLoc();
12424 assert (Node->getValueType(0) == MVT::i64 &&
12425 "Only know how to expand i64 atomics");
12427 SDValue Chain = Node->getOperand(0);
12428 SDValue In1 = Node->getOperand(1);
12429 SDValue In2L = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
12430 Node->getOperand(2), DAG.getIntPtrConstant(0));
12431 SDValue In2H = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
12432 Node->getOperand(2), DAG.getIntPtrConstant(1));
12433 SDValue Ops[] = { Chain, In1, In2L, In2H };
12434 SDVTList Tys = DAG.getVTList(MVT::i32, MVT::i32, MVT::Other);
12436 DAG.getMemIntrinsicNode(NewOp, dl, Tys, Ops, 4, MVT::i64,
12437 cast<MemSDNode>(Node)->getMemOperand());
12438 SDValue OpsF[] = { Result.getValue(0), Result.getValue(1)};
12439 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, OpsF, 2));
12440 Results.push_back(Result.getValue(2));
12443 /// ReplaceNodeResults - Replace a node with an illegal result type
12444 /// with a new node built out of custom code.
12445 void X86TargetLowering::ReplaceNodeResults(SDNode *N,
12446 SmallVectorImpl<SDValue>&Results,
12447 SelectionDAG &DAG) const {
12448 DebugLoc dl = N->getDebugLoc();
12449 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
12450 switch (N->getOpcode()) {
12452 llvm_unreachable("Do not know how to custom type legalize this operation!");
12453 case ISD::SIGN_EXTEND_INREG:
12458 // We don't want to expand or promote these.
12460 case ISD::FP_TO_SINT:
12461 case ISD::FP_TO_UINT: {
12462 bool IsSigned = N->getOpcode() == ISD::FP_TO_SINT;
12464 if (!IsSigned && !isIntegerTypeFTOL(SDValue(N, 0).getValueType()))
12467 std::pair<SDValue,SDValue> Vals =
12468 FP_TO_INTHelper(SDValue(N, 0), DAG, IsSigned, /*IsReplace=*/ true);
12469 SDValue FIST = Vals.first, StackSlot = Vals.second;
12470 if (FIST.getNode() != 0) {
12471 EVT VT = N->getValueType(0);
12472 // Return a load from the stack slot.
12473 if (StackSlot.getNode() != 0)
12474 Results.push_back(DAG.getLoad(VT, dl, FIST, StackSlot,
12475 MachinePointerInfo(),
12476 false, false, false, 0));
12478 Results.push_back(FIST);
12482 case ISD::UINT_TO_FP: {
12483 assert(Subtarget->hasSSE2() && "Requires at least SSE2!");
12484 if (N->getOperand(0).getValueType() != MVT::v2i32 ||
12485 N->getValueType(0) != MVT::v2f32)
12487 SDValue ZExtIn = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v2i64,
12489 SDValue Bias = DAG.getConstantFP(BitsToDouble(0x4330000000000000ULL),
12491 SDValue VBias = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v2f64, Bias, Bias);
12492 SDValue Or = DAG.getNode(ISD::OR, dl, MVT::v2i64, ZExtIn,
12493 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, VBias));
12494 Or = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Or);
12495 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::v2f64, Or, VBias);
12496 Results.push_back(DAG.getNode(X86ISD::VFPROUND, dl, MVT::v4f32, Sub));
12499 case ISD::FP_ROUND: {
12500 if (!TLI.isTypeLegal(N->getOperand(0).getValueType()))
12502 SDValue V = DAG.getNode(X86ISD::VFPROUND, dl, MVT::v4f32, N->getOperand(0));
12503 Results.push_back(V);
12506 case ISD::READCYCLECOUNTER: {
12507 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
12508 SDValue TheChain = N->getOperand(0);
12509 SDValue rd = DAG.getNode(X86ISD::RDTSC_DAG, dl, Tys, &TheChain, 1);
12510 SDValue eax = DAG.getCopyFromReg(rd, dl, X86::EAX, MVT::i32,
12512 SDValue edx = DAG.getCopyFromReg(eax.getValue(1), dl, X86::EDX, MVT::i32,
12514 // Use a buildpair to merge the two 32-bit values into a 64-bit one.
12515 SDValue Ops[] = { eax, edx };
12516 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Ops, 2));
12517 Results.push_back(edx.getValue(1));
12520 case ISD::ATOMIC_CMP_SWAP: {
12521 EVT T = N->getValueType(0);
12522 assert((T == MVT::i64 || T == MVT::i128) && "can only expand cmpxchg pair");
12523 bool Regs64bit = T == MVT::i128;
12524 EVT HalfT = Regs64bit ? MVT::i64 : MVT::i32;
12525 SDValue cpInL, cpInH;
12526 cpInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(2),
12527 DAG.getConstant(0, HalfT));
12528 cpInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(2),
12529 DAG.getConstant(1, HalfT));
12530 cpInL = DAG.getCopyToReg(N->getOperand(0), dl,
12531 Regs64bit ? X86::RAX : X86::EAX,
12533 cpInH = DAG.getCopyToReg(cpInL.getValue(0), dl,
12534 Regs64bit ? X86::RDX : X86::EDX,
12535 cpInH, cpInL.getValue(1));
12536 SDValue swapInL, swapInH;
12537 swapInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(3),
12538 DAG.getConstant(0, HalfT));
12539 swapInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(3),
12540 DAG.getConstant(1, HalfT));
12541 swapInL = DAG.getCopyToReg(cpInH.getValue(0), dl,
12542 Regs64bit ? X86::RBX : X86::EBX,
12543 swapInL, cpInH.getValue(1));
12544 swapInH = DAG.getCopyToReg(swapInL.getValue(0), dl,
12545 Regs64bit ? X86::RCX : X86::ECX,
12546 swapInH, swapInL.getValue(1));
12547 SDValue Ops[] = { swapInH.getValue(0),
12549 swapInH.getValue(1) };
12550 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
12551 MachineMemOperand *MMO = cast<AtomicSDNode>(N)->getMemOperand();
12552 unsigned Opcode = Regs64bit ? X86ISD::LCMPXCHG16_DAG :
12553 X86ISD::LCMPXCHG8_DAG;
12554 SDValue Result = DAG.getMemIntrinsicNode(Opcode, dl, Tys,
12556 SDValue cpOutL = DAG.getCopyFromReg(Result.getValue(0), dl,
12557 Regs64bit ? X86::RAX : X86::EAX,
12558 HalfT, Result.getValue(1));
12559 SDValue cpOutH = DAG.getCopyFromReg(cpOutL.getValue(1), dl,
12560 Regs64bit ? X86::RDX : X86::EDX,
12561 HalfT, cpOutL.getValue(2));
12562 SDValue OpsF[] = { cpOutL.getValue(0), cpOutH.getValue(0)};
12563 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, T, OpsF, 2));
12564 Results.push_back(cpOutH.getValue(1));
12567 case ISD::ATOMIC_LOAD_ADD:
12568 case ISD::ATOMIC_LOAD_AND:
12569 case ISD::ATOMIC_LOAD_NAND:
12570 case ISD::ATOMIC_LOAD_OR:
12571 case ISD::ATOMIC_LOAD_SUB:
12572 case ISD::ATOMIC_LOAD_XOR:
12573 case ISD::ATOMIC_LOAD_MAX:
12574 case ISD::ATOMIC_LOAD_MIN:
12575 case ISD::ATOMIC_LOAD_UMAX:
12576 case ISD::ATOMIC_LOAD_UMIN:
12577 case ISD::ATOMIC_SWAP: {
12579 switch (N->getOpcode()) {
12580 default: llvm_unreachable("Unexpected opcode");
12581 case ISD::ATOMIC_LOAD_ADD:
12582 Opc = X86ISD::ATOMADD64_DAG;
12584 case ISD::ATOMIC_LOAD_AND:
12585 Opc = X86ISD::ATOMAND64_DAG;
12587 case ISD::ATOMIC_LOAD_NAND:
12588 Opc = X86ISD::ATOMNAND64_DAG;
12590 case ISD::ATOMIC_LOAD_OR:
12591 Opc = X86ISD::ATOMOR64_DAG;
12593 case ISD::ATOMIC_LOAD_SUB:
12594 Opc = X86ISD::ATOMSUB64_DAG;
12596 case ISD::ATOMIC_LOAD_XOR:
12597 Opc = X86ISD::ATOMXOR64_DAG;
12599 case ISD::ATOMIC_LOAD_MAX:
12600 Opc = X86ISD::ATOMMAX64_DAG;
12602 case ISD::ATOMIC_LOAD_MIN:
12603 Opc = X86ISD::ATOMMIN64_DAG;
12605 case ISD::ATOMIC_LOAD_UMAX:
12606 Opc = X86ISD::ATOMUMAX64_DAG;
12608 case ISD::ATOMIC_LOAD_UMIN:
12609 Opc = X86ISD::ATOMUMIN64_DAG;
12611 case ISD::ATOMIC_SWAP:
12612 Opc = X86ISD::ATOMSWAP64_DAG;
12615 ReplaceATOMIC_BINARY_64(N, Results, DAG, Opc);
12618 case ISD::ATOMIC_LOAD:
12619 ReplaceATOMIC_LOAD(N, Results, DAG);
12623 const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const {
12625 default: return NULL;
12626 case X86ISD::BSF: return "X86ISD::BSF";
12627 case X86ISD::BSR: return "X86ISD::BSR";
12628 case X86ISD::SHLD: return "X86ISD::SHLD";
12629 case X86ISD::SHRD: return "X86ISD::SHRD";
12630 case X86ISD::FAND: return "X86ISD::FAND";
12631 case X86ISD::FOR: return "X86ISD::FOR";
12632 case X86ISD::FXOR: return "X86ISD::FXOR";
12633 case X86ISD::FSRL: return "X86ISD::FSRL";
12634 case X86ISD::FILD: return "X86ISD::FILD";
12635 case X86ISD::FILD_FLAG: return "X86ISD::FILD_FLAG";
12636 case X86ISD::FP_TO_INT16_IN_MEM: return "X86ISD::FP_TO_INT16_IN_MEM";
12637 case X86ISD::FP_TO_INT32_IN_MEM: return "X86ISD::FP_TO_INT32_IN_MEM";
12638 case X86ISD::FP_TO_INT64_IN_MEM: return "X86ISD::FP_TO_INT64_IN_MEM";
12639 case X86ISD::FLD: return "X86ISD::FLD";
12640 case X86ISD::FST: return "X86ISD::FST";
12641 case X86ISD::CALL: return "X86ISD::CALL";
12642 case X86ISD::RDTSC_DAG: return "X86ISD::RDTSC_DAG";
12643 case X86ISD::BT: return "X86ISD::BT";
12644 case X86ISD::CMP: return "X86ISD::CMP";
12645 case X86ISD::COMI: return "X86ISD::COMI";
12646 case X86ISD::UCOMI: return "X86ISD::UCOMI";
12647 case X86ISD::SETCC: return "X86ISD::SETCC";
12648 case X86ISD::SETCC_CARRY: return "X86ISD::SETCC_CARRY";
12649 case X86ISD::FSETCCsd: return "X86ISD::FSETCCsd";
12650 case X86ISD::FSETCCss: return "X86ISD::FSETCCss";
12651 case X86ISD::CMOV: return "X86ISD::CMOV";
12652 case X86ISD::BRCOND: return "X86ISD::BRCOND";
12653 case X86ISD::RET_FLAG: return "X86ISD::RET_FLAG";
12654 case X86ISD::REP_STOS: return "X86ISD::REP_STOS";
12655 case X86ISD::REP_MOVS: return "X86ISD::REP_MOVS";
12656 case X86ISD::GlobalBaseReg: return "X86ISD::GlobalBaseReg";
12657 case X86ISD::Wrapper: return "X86ISD::Wrapper";
12658 case X86ISD::WrapperRIP: return "X86ISD::WrapperRIP";
12659 case X86ISD::PEXTRB: return "X86ISD::PEXTRB";
12660 case X86ISD::PEXTRW: return "X86ISD::PEXTRW";
12661 case X86ISD::INSERTPS: return "X86ISD::INSERTPS";
12662 case X86ISD::PINSRB: return "X86ISD::PINSRB";
12663 case X86ISD::PINSRW: return "X86ISD::PINSRW";
12664 case X86ISD::PSHUFB: return "X86ISD::PSHUFB";
12665 case X86ISD::ANDNP: return "X86ISD::ANDNP";
12666 case X86ISD::PSIGN: return "X86ISD::PSIGN";
12667 case X86ISD::BLENDV: return "X86ISD::BLENDV";
12668 case X86ISD::BLENDI: return "X86ISD::BLENDI";
12669 case X86ISD::SUBUS: return "X86ISD::SUBUS";
12670 case X86ISD::HADD: return "X86ISD::HADD";
12671 case X86ISD::HSUB: return "X86ISD::HSUB";
12672 case X86ISD::FHADD: return "X86ISD::FHADD";
12673 case X86ISD::FHSUB: return "X86ISD::FHSUB";
12674 case X86ISD::UMAX: return "X86ISD::UMAX";
12675 case X86ISD::UMIN: return "X86ISD::UMIN";
12676 case X86ISD::SMAX: return "X86ISD::SMAX";
12677 case X86ISD::SMIN: return "X86ISD::SMIN";
12678 case X86ISD::FMAX: return "X86ISD::FMAX";
12679 case X86ISD::FMIN: return "X86ISD::FMIN";
12680 case X86ISD::FMAXC: return "X86ISD::FMAXC";
12681 case X86ISD::FMINC: return "X86ISD::FMINC";
12682 case X86ISD::FRSQRT: return "X86ISD::FRSQRT";
12683 case X86ISD::FRCP: return "X86ISD::FRCP";
12684 case X86ISD::TLSADDR: return "X86ISD::TLSADDR";
12685 case X86ISD::TLSBASEADDR: return "X86ISD::TLSBASEADDR";
12686 case X86ISD::TLSCALL: return "X86ISD::TLSCALL";
12687 case X86ISD::EH_SJLJ_SETJMP: return "X86ISD::EH_SJLJ_SETJMP";
12688 case X86ISD::EH_SJLJ_LONGJMP: return "X86ISD::EH_SJLJ_LONGJMP";
12689 case X86ISD::EH_RETURN: return "X86ISD::EH_RETURN";
12690 case X86ISD::TC_RETURN: return "X86ISD::TC_RETURN";
12691 case X86ISD::FNSTCW16m: return "X86ISD::FNSTCW16m";
12692 case X86ISD::FNSTSW16r: return "X86ISD::FNSTSW16r";
12693 case X86ISD::LCMPXCHG_DAG: return "X86ISD::LCMPXCHG_DAG";
12694 case X86ISD::LCMPXCHG8_DAG: return "X86ISD::LCMPXCHG8_DAG";
12695 case X86ISD::ATOMADD64_DAG: return "X86ISD::ATOMADD64_DAG";
12696 case X86ISD::ATOMSUB64_DAG: return "X86ISD::ATOMSUB64_DAG";
12697 case X86ISD::ATOMOR64_DAG: return "X86ISD::ATOMOR64_DAG";
12698 case X86ISD::ATOMXOR64_DAG: return "X86ISD::ATOMXOR64_DAG";
12699 case X86ISD::ATOMAND64_DAG: return "X86ISD::ATOMAND64_DAG";
12700 case X86ISD::ATOMNAND64_DAG: return "X86ISD::ATOMNAND64_DAG";
12701 case X86ISD::VZEXT_MOVL: return "X86ISD::VZEXT_MOVL";
12702 case X86ISD::VSEXT_MOVL: return "X86ISD::VSEXT_MOVL";
12703 case X86ISD::VZEXT_LOAD: return "X86ISD::VZEXT_LOAD";
12704 case X86ISD::VZEXT: return "X86ISD::VZEXT";
12705 case X86ISD::VSEXT: return "X86ISD::VSEXT";
12706 case X86ISD::VFPEXT: return "X86ISD::VFPEXT";
12707 case X86ISD::VFPROUND: return "X86ISD::VFPROUND";
12708 case X86ISD::VSHLDQ: return "X86ISD::VSHLDQ";
12709 case X86ISD::VSRLDQ: return "X86ISD::VSRLDQ";
12710 case X86ISD::VSHL: return "X86ISD::VSHL";
12711 case X86ISD::VSRL: return "X86ISD::VSRL";
12712 case X86ISD::VSRA: return "X86ISD::VSRA";
12713 case X86ISD::VSHLI: return "X86ISD::VSHLI";
12714 case X86ISD::VSRLI: return "X86ISD::VSRLI";
12715 case X86ISD::VSRAI: return "X86ISD::VSRAI";
12716 case X86ISD::CMPP: return "X86ISD::CMPP";
12717 case X86ISD::PCMPEQ: return "X86ISD::PCMPEQ";
12718 case X86ISD::PCMPGT: return "X86ISD::PCMPGT";
12719 case X86ISD::ADD: return "X86ISD::ADD";
12720 case X86ISD::SUB: return "X86ISD::SUB";
12721 case X86ISD::ADC: return "X86ISD::ADC";
12722 case X86ISD::SBB: return "X86ISD::SBB";
12723 case X86ISD::SMUL: return "X86ISD::SMUL";
12724 case X86ISD::UMUL: return "X86ISD::UMUL";
12725 case X86ISD::INC: return "X86ISD::INC";
12726 case X86ISD::DEC: return "X86ISD::DEC";
12727 case X86ISD::OR: return "X86ISD::OR";
12728 case X86ISD::XOR: return "X86ISD::XOR";
12729 case X86ISD::AND: return "X86ISD::AND";
12730 case X86ISD::BLSI: return "X86ISD::BLSI";
12731 case X86ISD::BLSMSK: return "X86ISD::BLSMSK";
12732 case X86ISD::BLSR: return "X86ISD::BLSR";
12733 case X86ISD::MUL_IMM: return "X86ISD::MUL_IMM";
12734 case X86ISD::PTEST: return "X86ISD::PTEST";
12735 case X86ISD::TESTP: return "X86ISD::TESTP";
12736 case X86ISD::PALIGNR: return "X86ISD::PALIGNR";
12737 case X86ISD::PSHUFD: return "X86ISD::PSHUFD";
12738 case X86ISD::PSHUFHW: return "X86ISD::PSHUFHW";
12739 case X86ISD::PSHUFLW: return "X86ISD::PSHUFLW";
12740 case X86ISD::SHUFP: return "X86ISD::SHUFP";
12741 case X86ISD::MOVLHPS: return "X86ISD::MOVLHPS";
12742 case X86ISD::MOVLHPD: return "X86ISD::MOVLHPD";
12743 case X86ISD::MOVHLPS: return "X86ISD::MOVHLPS";
12744 case X86ISD::MOVLPS: return "X86ISD::MOVLPS";
12745 case X86ISD::MOVLPD: return "X86ISD::MOVLPD";
12746 case X86ISD::MOVDDUP: return "X86ISD::MOVDDUP";
12747 case X86ISD::MOVSHDUP: return "X86ISD::MOVSHDUP";
12748 case X86ISD::MOVSLDUP: return "X86ISD::MOVSLDUP";
12749 case X86ISD::MOVSD: return "X86ISD::MOVSD";
12750 case X86ISD::MOVSS: return "X86ISD::MOVSS";
12751 case X86ISD::UNPCKL: return "X86ISD::UNPCKL";
12752 case X86ISD::UNPCKH: return "X86ISD::UNPCKH";
12753 case X86ISD::VBROADCAST: return "X86ISD::VBROADCAST";
12754 case X86ISD::VPERMILP: return "X86ISD::VPERMILP";
12755 case X86ISD::VPERM2X128: return "X86ISD::VPERM2X128";
12756 case X86ISD::VPERMV: return "X86ISD::VPERMV";
12757 case X86ISD::VPERMI: return "X86ISD::VPERMI";
12758 case X86ISD::PMULUDQ: return "X86ISD::PMULUDQ";
12759 case X86ISD::VASTART_SAVE_XMM_REGS: return "X86ISD::VASTART_SAVE_XMM_REGS";
12760 case X86ISD::VAARG_64: return "X86ISD::VAARG_64";
12761 case X86ISD::WIN_ALLOCA: return "X86ISD::WIN_ALLOCA";
12762 case X86ISD::MEMBARRIER: return "X86ISD::MEMBARRIER";
12763 case X86ISD::SEG_ALLOCA: return "X86ISD::SEG_ALLOCA";
12764 case X86ISD::WIN_FTOL: return "X86ISD::WIN_FTOL";
12765 case X86ISD::SAHF: return "X86ISD::SAHF";
12766 case X86ISD::RDRAND: return "X86ISD::RDRAND";
12767 case X86ISD::FMADD: return "X86ISD::FMADD";
12768 case X86ISD::FMSUB: return "X86ISD::FMSUB";
12769 case X86ISD::FNMADD: return "X86ISD::FNMADD";
12770 case X86ISD::FNMSUB: return "X86ISD::FNMSUB";
12771 case X86ISD::FMADDSUB: return "X86ISD::FMADDSUB";
12772 case X86ISD::FMSUBADD: return "X86ISD::FMSUBADD";
12773 case X86ISD::PCMPESTRI: return "X86ISD::PCMPESTRI";
12774 case X86ISD::PCMPISTRI: return "X86ISD::PCMPISTRI";
12778 // isLegalAddressingMode - Return true if the addressing mode represented
12779 // by AM is legal for this target, for a load/store of the specified type.
12780 bool X86TargetLowering::isLegalAddressingMode(const AddrMode &AM,
12782 // X86 supports extremely general addressing modes.
12783 CodeModel::Model M = getTargetMachine().getCodeModel();
12784 Reloc::Model R = getTargetMachine().getRelocationModel();
12786 // X86 allows a sign-extended 32-bit immediate field as a displacement.
12787 if (!X86::isOffsetSuitableForCodeModel(AM.BaseOffs, M, AM.BaseGV != NULL))
12792 Subtarget->ClassifyGlobalReference(AM.BaseGV, getTargetMachine());
12794 // If a reference to this global requires an extra load, we can't fold it.
12795 if (isGlobalStubReference(GVFlags))
12798 // If BaseGV requires a register for the PIC base, we cannot also have a
12799 // BaseReg specified.
12800 if (AM.HasBaseReg && isGlobalRelativeToPICBase(GVFlags))
12803 // If lower 4G is not available, then we must use rip-relative addressing.
12804 if ((M != CodeModel::Small || R != Reloc::Static) &&
12805 Subtarget->is64Bit() && (AM.BaseOffs || AM.Scale > 1))
12809 switch (AM.Scale) {
12815 // These scales always work.
12820 // These scales are formed with basereg+scalereg. Only accept if there is
12825 default: // Other stuff never works.
12832 bool X86TargetLowering::isTruncateFree(Type *Ty1, Type *Ty2) const {
12833 if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy())
12835 unsigned NumBits1 = Ty1->getPrimitiveSizeInBits();
12836 unsigned NumBits2 = Ty2->getPrimitiveSizeInBits();
12837 return NumBits1 > NumBits2;
12840 bool X86TargetLowering::isLegalICmpImmediate(int64_t Imm) const {
12841 return isInt<32>(Imm);
12844 bool X86TargetLowering::isLegalAddImmediate(int64_t Imm) const {
12845 // Can also use sub to handle negated immediates.
12846 return isInt<32>(Imm);
12849 bool X86TargetLowering::isTruncateFree(EVT VT1, EVT VT2) const {
12850 if (!VT1.isInteger() || !VT2.isInteger())
12852 unsigned NumBits1 = VT1.getSizeInBits();
12853 unsigned NumBits2 = VT2.getSizeInBits();
12854 return NumBits1 > NumBits2;
12857 bool X86TargetLowering::isZExtFree(Type *Ty1, Type *Ty2) const {
12858 // x86-64 implicitly zero-extends 32-bit results in 64-bit registers.
12859 return Ty1->isIntegerTy(32) && Ty2->isIntegerTy(64) && Subtarget->is64Bit();
12862 bool X86TargetLowering::isZExtFree(EVT VT1, EVT VT2) const {
12863 // x86-64 implicitly zero-extends 32-bit results in 64-bit registers.
12864 return VT1 == MVT::i32 && VT2 == MVT::i64 && Subtarget->is64Bit();
12867 bool X86TargetLowering::isZExtFree(SDValue Val, EVT VT2) const {
12868 EVT VT1 = Val.getValueType();
12869 if (isZExtFree(VT1, VT2))
12872 if (Val.getOpcode() != ISD::LOAD)
12875 if (!VT1.isSimple() || !VT1.isInteger() ||
12876 !VT2.isSimple() || !VT2.isInteger())
12879 switch (VT1.getSimpleVT().SimpleTy) {
12884 // X86 has 8, 16, and 32-bit zero-extending loads.
12891 bool X86TargetLowering::isNarrowingProfitable(EVT VT1, EVT VT2) const {
12892 // i16 instructions are longer (0x66 prefix) and potentially slower.
12893 return !(VT1 == MVT::i32 && VT2 == MVT::i16);
12896 /// isShuffleMaskLegal - Targets can use this to indicate that they only
12897 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
12898 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
12899 /// are assumed to be legal.
12901 X86TargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &M,
12903 // Very little shuffling can be done for 64-bit vectors right now.
12904 if (VT.getSizeInBits() == 64)
12907 // FIXME: pshufb, blends, shifts.
12908 return (VT.getVectorNumElements() == 2 ||
12909 ShuffleVectorSDNode::isSplatMask(&M[0], VT) ||
12910 isMOVLMask(M, VT) ||
12911 isSHUFPMask(M, VT, Subtarget->hasFp256()) ||
12912 isPSHUFDMask(M, VT) ||
12913 isPSHUFHWMask(M, VT, Subtarget->hasInt256()) ||
12914 isPSHUFLWMask(M, VT, Subtarget->hasInt256()) ||
12915 isPALIGNRMask(M, VT, Subtarget) ||
12916 isUNPCKLMask(M, VT, Subtarget->hasInt256()) ||
12917 isUNPCKHMask(M, VT, Subtarget->hasInt256()) ||
12918 isUNPCKL_v_undef_Mask(M, VT, Subtarget->hasInt256()) ||
12919 isUNPCKH_v_undef_Mask(M, VT, Subtarget->hasInt256()));
12923 X86TargetLowering::isVectorClearMaskLegal(const SmallVectorImpl<int> &Mask,
12925 unsigned NumElts = VT.getVectorNumElements();
12926 // FIXME: This collection of masks seems suspect.
12929 if (NumElts == 4 && VT.is128BitVector()) {
12930 return (isMOVLMask(Mask, VT) ||
12931 isCommutedMOVLMask(Mask, VT, true) ||
12932 isSHUFPMask(Mask, VT, Subtarget->hasFp256()) ||
12933 isSHUFPMask(Mask, VT, Subtarget->hasFp256(), /* Commuted */ true));
12938 //===----------------------------------------------------------------------===//
12939 // X86 Scheduler Hooks
12940 //===----------------------------------------------------------------------===//
12942 /// Utility function to emit xbegin specifying the start of an RTM region.
12943 static MachineBasicBlock *EmitXBegin(MachineInstr *MI, MachineBasicBlock *MBB,
12944 const TargetInstrInfo *TII) {
12945 DebugLoc DL = MI->getDebugLoc();
12947 const BasicBlock *BB = MBB->getBasicBlock();
12948 MachineFunction::iterator I = MBB;
12951 // For the v = xbegin(), we generate
12962 MachineBasicBlock *thisMBB = MBB;
12963 MachineFunction *MF = MBB->getParent();
12964 MachineBasicBlock *mainMBB = MF->CreateMachineBasicBlock(BB);
12965 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(BB);
12966 MF->insert(I, mainMBB);
12967 MF->insert(I, sinkMBB);
12969 // Transfer the remainder of BB and its successor edges to sinkMBB.
12970 sinkMBB->splice(sinkMBB->begin(), MBB,
12971 llvm::next(MachineBasicBlock::iterator(MI)), MBB->end());
12972 sinkMBB->transferSuccessorsAndUpdatePHIs(MBB);
12976 // # fallthrough to mainMBB
12977 // # abortion to sinkMBB
12978 BuildMI(thisMBB, DL, TII->get(X86::XBEGIN_4)).addMBB(sinkMBB);
12979 thisMBB->addSuccessor(mainMBB);
12980 thisMBB->addSuccessor(sinkMBB);
12984 BuildMI(mainMBB, DL, TII->get(X86::MOV32ri), X86::EAX).addImm(-1);
12985 mainMBB->addSuccessor(sinkMBB);
12988 // EAX is live into the sinkMBB
12989 sinkMBB->addLiveIn(X86::EAX);
12990 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
12991 TII->get(TargetOpcode::COPY), MI->getOperand(0).getReg())
12994 MI->eraseFromParent();
12998 // Get CMPXCHG opcode for the specified data type.
12999 static unsigned getCmpXChgOpcode(EVT VT) {
13000 switch (VT.getSimpleVT().SimpleTy) {
13001 case MVT::i8: return X86::LCMPXCHG8;
13002 case MVT::i16: return X86::LCMPXCHG16;
13003 case MVT::i32: return X86::LCMPXCHG32;
13004 case MVT::i64: return X86::LCMPXCHG64;
13008 llvm_unreachable("Invalid operand size!");
13011 // Get LOAD opcode for the specified data type.
13012 static unsigned getLoadOpcode(EVT VT) {
13013 switch (VT.getSimpleVT().SimpleTy) {
13014 case MVT::i8: return X86::MOV8rm;
13015 case MVT::i16: return X86::MOV16rm;
13016 case MVT::i32: return X86::MOV32rm;
13017 case MVT::i64: return X86::MOV64rm;
13021 llvm_unreachable("Invalid operand size!");
13024 // Get opcode of the non-atomic one from the specified atomic instruction.
13025 static unsigned getNonAtomicOpcode(unsigned Opc) {
13027 case X86::ATOMAND8: return X86::AND8rr;
13028 case X86::ATOMAND16: return X86::AND16rr;
13029 case X86::ATOMAND32: return X86::AND32rr;
13030 case X86::ATOMAND64: return X86::AND64rr;
13031 case X86::ATOMOR8: return X86::OR8rr;
13032 case X86::ATOMOR16: return X86::OR16rr;
13033 case X86::ATOMOR32: return X86::OR32rr;
13034 case X86::ATOMOR64: return X86::OR64rr;
13035 case X86::ATOMXOR8: return X86::XOR8rr;
13036 case X86::ATOMXOR16: return X86::XOR16rr;
13037 case X86::ATOMXOR32: return X86::XOR32rr;
13038 case X86::ATOMXOR64: return X86::XOR64rr;
13040 llvm_unreachable("Unhandled atomic-load-op opcode!");
13043 // Get opcode of the non-atomic one from the specified atomic instruction with
13045 static unsigned getNonAtomicOpcodeWithExtraOpc(unsigned Opc,
13046 unsigned &ExtraOpc) {
13048 case X86::ATOMNAND8: ExtraOpc = X86::NOT8r; return X86::AND8rr;
13049 case X86::ATOMNAND16: ExtraOpc = X86::NOT16r; return X86::AND16rr;
13050 case X86::ATOMNAND32: ExtraOpc = X86::NOT32r; return X86::AND32rr;
13051 case X86::ATOMNAND64: ExtraOpc = X86::NOT64r; return X86::AND64rr;
13052 case X86::ATOMMAX8: ExtraOpc = X86::CMP8rr; return X86::CMOVL32rr;
13053 case X86::ATOMMAX16: ExtraOpc = X86::CMP16rr; return X86::CMOVL16rr;
13054 case X86::ATOMMAX32: ExtraOpc = X86::CMP32rr; return X86::CMOVL32rr;
13055 case X86::ATOMMAX64: ExtraOpc = X86::CMP64rr; return X86::CMOVL64rr;
13056 case X86::ATOMMIN8: ExtraOpc = X86::CMP8rr; return X86::CMOVG32rr;
13057 case X86::ATOMMIN16: ExtraOpc = X86::CMP16rr; return X86::CMOVG16rr;
13058 case X86::ATOMMIN32: ExtraOpc = X86::CMP32rr; return X86::CMOVG32rr;
13059 case X86::ATOMMIN64: ExtraOpc = X86::CMP64rr; return X86::CMOVG64rr;
13060 case X86::ATOMUMAX8: ExtraOpc = X86::CMP8rr; return X86::CMOVB32rr;
13061 case X86::ATOMUMAX16: ExtraOpc = X86::CMP16rr; return X86::CMOVB16rr;
13062 case X86::ATOMUMAX32: ExtraOpc = X86::CMP32rr; return X86::CMOVB32rr;
13063 case X86::ATOMUMAX64: ExtraOpc = X86::CMP64rr; return X86::CMOVB64rr;
13064 case X86::ATOMUMIN8: ExtraOpc = X86::CMP8rr; return X86::CMOVA32rr;
13065 case X86::ATOMUMIN16: ExtraOpc = X86::CMP16rr; return X86::CMOVA16rr;
13066 case X86::ATOMUMIN32: ExtraOpc = X86::CMP32rr; return X86::CMOVA32rr;
13067 case X86::ATOMUMIN64: ExtraOpc = X86::CMP64rr; return X86::CMOVA64rr;
13069 llvm_unreachable("Unhandled atomic-load-op opcode!");
13072 // Get opcode of the non-atomic one from the specified atomic instruction for
13073 // 64-bit data type on 32-bit target.
13074 static unsigned getNonAtomic6432Opcode(unsigned Opc, unsigned &HiOpc) {
13076 case X86::ATOMAND6432: HiOpc = X86::AND32rr; return X86::AND32rr;
13077 case X86::ATOMOR6432: HiOpc = X86::OR32rr; return X86::OR32rr;
13078 case X86::ATOMXOR6432: HiOpc = X86::XOR32rr; return X86::XOR32rr;
13079 case X86::ATOMADD6432: HiOpc = X86::ADC32rr; return X86::ADD32rr;
13080 case X86::ATOMSUB6432: HiOpc = X86::SBB32rr; return X86::SUB32rr;
13081 case X86::ATOMSWAP6432: HiOpc = X86::MOV32rr; return X86::MOV32rr;
13082 case X86::ATOMMAX6432: HiOpc = X86::SETLr; return X86::SETLr;
13083 case X86::ATOMMIN6432: HiOpc = X86::SETGr; return X86::SETGr;
13084 case X86::ATOMUMAX6432: HiOpc = X86::SETBr; return X86::SETBr;
13085 case X86::ATOMUMIN6432: HiOpc = X86::SETAr; return X86::SETAr;
13087 llvm_unreachable("Unhandled atomic-load-op opcode!");
13090 // Get opcode of the non-atomic one from the specified atomic instruction for
13091 // 64-bit data type on 32-bit target with extra opcode.
13092 static unsigned getNonAtomic6432OpcodeWithExtraOpc(unsigned Opc,
13094 unsigned &ExtraOpc) {
13096 case X86::ATOMNAND6432:
13097 ExtraOpc = X86::NOT32r;
13098 HiOpc = X86::AND32rr;
13099 return X86::AND32rr;
13101 llvm_unreachable("Unhandled atomic-load-op opcode!");
13104 // Get pseudo CMOV opcode from the specified data type.
13105 static unsigned getPseudoCMOVOpc(EVT VT) {
13106 switch (VT.getSimpleVT().SimpleTy) {
13107 case MVT::i8: return X86::CMOV_GR8;
13108 case MVT::i16: return X86::CMOV_GR16;
13109 case MVT::i32: return X86::CMOV_GR32;
13113 llvm_unreachable("Unknown CMOV opcode!");
13116 // EmitAtomicLoadArith - emit the code sequence for pseudo atomic instructions.
13117 // They will be translated into a spin-loop or compare-exchange loop from
13120 // dst = atomic-fetch-op MI.addr, MI.val
13126 // t1 = LOAD MI.addr
13128 // t4 = phi(t1, t3 / loop)
13129 // t2 = OP MI.val, t4
13131 // LCMPXCHG [MI.addr], t2, [EAX is implicitly used & defined]
13137 MachineBasicBlock *
13138 X86TargetLowering::EmitAtomicLoadArith(MachineInstr *MI,
13139 MachineBasicBlock *MBB) const {
13140 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
13141 DebugLoc DL = MI->getDebugLoc();
13143 MachineFunction *MF = MBB->getParent();
13144 MachineRegisterInfo &MRI = MF->getRegInfo();
13146 const BasicBlock *BB = MBB->getBasicBlock();
13147 MachineFunction::iterator I = MBB;
13150 assert(MI->getNumOperands() <= X86::AddrNumOperands + 4 &&
13151 "Unexpected number of operands");
13153 assert(MI->hasOneMemOperand() &&
13154 "Expected atomic-load-op to have one memoperand");
13156 // Memory Reference
13157 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
13158 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
13160 unsigned DstReg, SrcReg;
13161 unsigned MemOpndSlot;
13163 unsigned CurOp = 0;
13165 DstReg = MI->getOperand(CurOp++).getReg();
13166 MemOpndSlot = CurOp;
13167 CurOp += X86::AddrNumOperands;
13168 SrcReg = MI->getOperand(CurOp++).getReg();
13170 const TargetRegisterClass *RC = MRI.getRegClass(DstReg);
13171 MVT::SimpleValueType VT = *RC->vt_begin();
13172 unsigned t1 = MRI.createVirtualRegister(RC);
13173 unsigned t2 = MRI.createVirtualRegister(RC);
13174 unsigned t3 = MRI.createVirtualRegister(RC);
13175 unsigned t4 = MRI.createVirtualRegister(RC);
13176 unsigned PhyReg = getX86SubSuperRegister(X86::EAX, VT);
13178 unsigned LCMPXCHGOpc = getCmpXChgOpcode(VT);
13179 unsigned LOADOpc = getLoadOpcode(VT);
13181 // For the atomic load-arith operator, we generate
13184 // t1 = LOAD [MI.addr]
13186 // t4 = phi(t1 / thisMBB, t3 / mainMBB)
13187 // t1 = OP MI.val, EAX
13189 // LCMPXCHG [MI.addr], t1, [EAX is implicitly used & defined]
13195 MachineBasicBlock *thisMBB = MBB;
13196 MachineBasicBlock *mainMBB = MF->CreateMachineBasicBlock(BB);
13197 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(BB);
13198 MF->insert(I, mainMBB);
13199 MF->insert(I, sinkMBB);
13201 MachineInstrBuilder MIB;
13203 // Transfer the remainder of BB and its successor edges to sinkMBB.
13204 sinkMBB->splice(sinkMBB->begin(), MBB,
13205 llvm::next(MachineBasicBlock::iterator(MI)), MBB->end());
13206 sinkMBB->transferSuccessorsAndUpdatePHIs(MBB);
13209 MIB = BuildMI(thisMBB, DL, TII->get(LOADOpc), t1);
13210 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
13211 MachineOperand NewMO = MI->getOperand(MemOpndSlot + i);
13213 NewMO.setIsKill(false);
13214 MIB.addOperand(NewMO);
13216 for (MachineInstr::mmo_iterator MMOI = MMOBegin; MMOI != MMOEnd; ++MMOI) {
13217 unsigned flags = (*MMOI)->getFlags();
13218 flags = (flags & ~MachineMemOperand::MOStore) | MachineMemOperand::MOLoad;
13219 MachineMemOperand *MMO =
13220 MF->getMachineMemOperand((*MMOI)->getPointerInfo(), flags,
13221 (*MMOI)->getSize(),
13222 (*MMOI)->getBaseAlignment(),
13223 (*MMOI)->getTBAAInfo(),
13224 (*MMOI)->getRanges());
13225 MIB.addMemOperand(MMO);
13228 thisMBB->addSuccessor(mainMBB);
13231 MachineBasicBlock *origMainMBB = mainMBB;
13234 MachineInstr *Phi = BuildMI(mainMBB, DL, TII->get(X86::PHI), t4)
13235 .addReg(t1).addMBB(thisMBB).addReg(t3).addMBB(mainMBB);
13237 unsigned Opc = MI->getOpcode();
13240 llvm_unreachable("Unhandled atomic-load-op opcode!");
13241 case X86::ATOMAND8:
13242 case X86::ATOMAND16:
13243 case X86::ATOMAND32:
13244 case X86::ATOMAND64:
13246 case X86::ATOMOR16:
13247 case X86::ATOMOR32:
13248 case X86::ATOMOR64:
13249 case X86::ATOMXOR8:
13250 case X86::ATOMXOR16:
13251 case X86::ATOMXOR32:
13252 case X86::ATOMXOR64: {
13253 unsigned ARITHOpc = getNonAtomicOpcode(Opc);
13254 BuildMI(mainMBB, DL, TII->get(ARITHOpc), t2).addReg(SrcReg)
13258 case X86::ATOMNAND8:
13259 case X86::ATOMNAND16:
13260 case X86::ATOMNAND32:
13261 case X86::ATOMNAND64: {
13262 unsigned Tmp = MRI.createVirtualRegister(RC);
13264 unsigned ANDOpc = getNonAtomicOpcodeWithExtraOpc(Opc, NOTOpc);
13265 BuildMI(mainMBB, DL, TII->get(ANDOpc), Tmp).addReg(SrcReg)
13267 BuildMI(mainMBB, DL, TII->get(NOTOpc), t2).addReg(Tmp);
13270 case X86::ATOMMAX8:
13271 case X86::ATOMMAX16:
13272 case X86::ATOMMAX32:
13273 case X86::ATOMMAX64:
13274 case X86::ATOMMIN8:
13275 case X86::ATOMMIN16:
13276 case X86::ATOMMIN32:
13277 case X86::ATOMMIN64:
13278 case X86::ATOMUMAX8:
13279 case X86::ATOMUMAX16:
13280 case X86::ATOMUMAX32:
13281 case X86::ATOMUMAX64:
13282 case X86::ATOMUMIN8:
13283 case X86::ATOMUMIN16:
13284 case X86::ATOMUMIN32:
13285 case X86::ATOMUMIN64: {
13287 unsigned CMOVOpc = getNonAtomicOpcodeWithExtraOpc(Opc, CMPOpc);
13289 BuildMI(mainMBB, DL, TII->get(CMPOpc))
13293 if (Subtarget->hasCMov()) {
13294 if (VT != MVT::i8) {
13296 BuildMI(mainMBB, DL, TII->get(CMOVOpc), t2)
13300 // Promote i8 to i32 to use CMOV32
13301 const TargetRegisterInfo* TRI = getTargetMachine().getRegisterInfo();
13302 const TargetRegisterClass *RC32 =
13303 TRI->getSubClassWithSubReg(getRegClassFor(MVT::i32), X86::sub_8bit);
13304 unsigned SrcReg32 = MRI.createVirtualRegister(RC32);
13305 unsigned AccReg32 = MRI.createVirtualRegister(RC32);
13306 unsigned Tmp = MRI.createVirtualRegister(RC32);
13308 unsigned Undef = MRI.createVirtualRegister(RC32);
13309 BuildMI(mainMBB, DL, TII->get(TargetOpcode::IMPLICIT_DEF), Undef);
13311 BuildMI(mainMBB, DL, TII->get(TargetOpcode::INSERT_SUBREG), SrcReg32)
13314 .addImm(X86::sub_8bit);
13315 BuildMI(mainMBB, DL, TII->get(TargetOpcode::INSERT_SUBREG), AccReg32)
13318 .addImm(X86::sub_8bit);
13320 BuildMI(mainMBB, DL, TII->get(CMOVOpc), Tmp)
13324 BuildMI(mainMBB, DL, TII->get(TargetOpcode::COPY), t2)
13325 .addReg(Tmp, 0, X86::sub_8bit);
13328 // Use pseudo select and lower them.
13329 assert((VT == MVT::i8 || VT == MVT::i16 || VT == MVT::i32) &&
13330 "Invalid atomic-load-op transformation!");
13331 unsigned SelOpc = getPseudoCMOVOpc(VT);
13332 X86::CondCode CC = X86::getCondFromCMovOpc(CMOVOpc);
13333 assert(CC != X86::COND_INVALID && "Invalid atomic-load-op transformation!");
13334 MIB = BuildMI(mainMBB, DL, TII->get(SelOpc), t2)
13335 .addReg(SrcReg).addReg(t4)
13337 mainMBB = EmitLoweredSelect(MIB, mainMBB);
13338 // Replace the original PHI node as mainMBB is changed after CMOV
13340 BuildMI(*origMainMBB, Phi, DL, TII->get(X86::PHI), t4)
13341 .addReg(t1).addMBB(thisMBB).addReg(t3).addMBB(mainMBB);
13342 Phi->eraseFromParent();
13348 // Copy PhyReg back from virtual register.
13349 BuildMI(mainMBB, DL, TII->get(TargetOpcode::COPY), PhyReg)
13352 MIB = BuildMI(mainMBB, DL, TII->get(LCMPXCHGOpc));
13353 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
13354 MachineOperand NewMO = MI->getOperand(MemOpndSlot + i);
13356 NewMO.setIsKill(false);
13357 MIB.addOperand(NewMO);
13360 MIB.setMemRefs(MMOBegin, MMOEnd);
13362 // Copy PhyReg back to virtual register.
13363 BuildMI(mainMBB, DL, TII->get(TargetOpcode::COPY), t3)
13366 BuildMI(mainMBB, DL, TII->get(X86::JNE_4)).addMBB(origMainMBB);
13368 mainMBB->addSuccessor(origMainMBB);
13369 mainMBB->addSuccessor(sinkMBB);
13372 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
13373 TII->get(TargetOpcode::COPY), DstReg)
13376 MI->eraseFromParent();
13380 // EmitAtomicLoadArith6432 - emit the code sequence for pseudo atomic
13381 // instructions. They will be translated into a spin-loop or compare-exchange
13385 // dst = atomic-fetch-op MI.addr, MI.val
13391 // t1L = LOAD [MI.addr + 0]
13392 // t1H = LOAD [MI.addr + 4]
13394 // t4L = phi(t1L, t3L / loop)
13395 // t4H = phi(t1H, t3H / loop)
13396 // t2L = OP MI.val.lo, t4L
13397 // t2H = OP MI.val.hi, t4H
13402 // LCMPXCHG8B [MI.addr], [ECX:EBX & EDX:EAX are implicitly used and EDX:EAX is implicitly defined]
13410 MachineBasicBlock *
13411 X86TargetLowering::EmitAtomicLoadArith6432(MachineInstr *MI,
13412 MachineBasicBlock *MBB) const {
13413 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
13414 DebugLoc DL = MI->getDebugLoc();
13416 MachineFunction *MF = MBB->getParent();
13417 MachineRegisterInfo &MRI = MF->getRegInfo();
13419 const BasicBlock *BB = MBB->getBasicBlock();
13420 MachineFunction::iterator I = MBB;
13423 assert(MI->getNumOperands() <= X86::AddrNumOperands + 7 &&
13424 "Unexpected number of operands");
13426 assert(MI->hasOneMemOperand() &&
13427 "Expected atomic-load-op32 to have one memoperand");
13429 // Memory Reference
13430 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
13431 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
13433 unsigned DstLoReg, DstHiReg;
13434 unsigned SrcLoReg, SrcHiReg;
13435 unsigned MemOpndSlot;
13437 unsigned CurOp = 0;
13439 DstLoReg = MI->getOperand(CurOp++).getReg();
13440 DstHiReg = MI->getOperand(CurOp++).getReg();
13441 MemOpndSlot = CurOp;
13442 CurOp += X86::AddrNumOperands;
13443 SrcLoReg = MI->getOperand(CurOp++).getReg();
13444 SrcHiReg = MI->getOperand(CurOp++).getReg();
13446 const TargetRegisterClass *RC = &X86::GR32RegClass;
13447 const TargetRegisterClass *RC8 = &X86::GR8RegClass;
13449 unsigned t1L = MRI.createVirtualRegister(RC);
13450 unsigned t1H = MRI.createVirtualRegister(RC);
13451 unsigned t2L = MRI.createVirtualRegister(RC);
13452 unsigned t2H = MRI.createVirtualRegister(RC);
13453 unsigned t3L = MRI.createVirtualRegister(RC);
13454 unsigned t3H = MRI.createVirtualRegister(RC);
13455 unsigned t4L = MRI.createVirtualRegister(RC);
13456 unsigned t4H = MRI.createVirtualRegister(RC);
13458 unsigned LCMPXCHGOpc = X86::LCMPXCHG8B;
13459 unsigned LOADOpc = X86::MOV32rm;
13461 // For the atomic load-arith operator, we generate
13464 // t1L = LOAD [MI.addr + 0]
13465 // t1H = LOAD [MI.addr + 4]
13467 // t4L = phi(t1L / thisMBB, t3L / mainMBB)
13468 // t4H = phi(t1H / thisMBB, t3H / mainMBB)
13469 // t2L = OP MI.val.lo, t4L
13470 // t2H = OP MI.val.hi, t4H
13473 // LCMPXCHG8B [MI.addr], [ECX:EBX & EDX:EAX are implicitly used and EDX:EAX is implicitly defined]
13481 MachineBasicBlock *thisMBB = MBB;
13482 MachineBasicBlock *mainMBB = MF->CreateMachineBasicBlock(BB);
13483 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(BB);
13484 MF->insert(I, mainMBB);
13485 MF->insert(I, sinkMBB);
13487 MachineInstrBuilder MIB;
13489 // Transfer the remainder of BB and its successor edges to sinkMBB.
13490 sinkMBB->splice(sinkMBB->begin(), MBB,
13491 llvm::next(MachineBasicBlock::iterator(MI)), MBB->end());
13492 sinkMBB->transferSuccessorsAndUpdatePHIs(MBB);
13496 MIB = BuildMI(thisMBB, DL, TII->get(LOADOpc), t1L);
13497 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
13498 MachineOperand NewMO = MI->getOperand(MemOpndSlot + i);
13500 NewMO.setIsKill(false);
13501 MIB.addOperand(NewMO);
13503 for (MachineInstr::mmo_iterator MMOI = MMOBegin; MMOI != MMOEnd; ++MMOI) {
13504 unsigned flags = (*MMOI)->getFlags();
13505 flags = (flags & ~MachineMemOperand::MOStore) | MachineMemOperand::MOLoad;
13506 MachineMemOperand *MMO =
13507 MF->getMachineMemOperand((*MMOI)->getPointerInfo(), flags,
13508 (*MMOI)->getSize(),
13509 (*MMOI)->getBaseAlignment(),
13510 (*MMOI)->getTBAAInfo(),
13511 (*MMOI)->getRanges());
13512 MIB.addMemOperand(MMO);
13514 MachineInstr *LowMI = MIB;
13517 MIB = BuildMI(thisMBB, DL, TII->get(LOADOpc), t1H);
13518 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
13519 if (i == X86::AddrDisp) {
13520 MIB.addDisp(MI->getOperand(MemOpndSlot + i), 4); // 4 == sizeof(i32)
13522 MachineOperand NewMO = MI->getOperand(MemOpndSlot + i);
13524 NewMO.setIsKill(false);
13525 MIB.addOperand(NewMO);
13528 MIB.setMemRefs(LowMI->memoperands_begin(), LowMI->memoperands_end());
13530 thisMBB->addSuccessor(mainMBB);
13533 MachineBasicBlock *origMainMBB = mainMBB;
13536 MachineInstr *PhiL = BuildMI(mainMBB, DL, TII->get(X86::PHI), t4L)
13537 .addReg(t1L).addMBB(thisMBB).addReg(t3L).addMBB(mainMBB);
13538 MachineInstr *PhiH = BuildMI(mainMBB, DL, TII->get(X86::PHI), t4H)
13539 .addReg(t1H).addMBB(thisMBB).addReg(t3H).addMBB(mainMBB);
13541 unsigned Opc = MI->getOpcode();
13544 llvm_unreachable("Unhandled atomic-load-op6432 opcode!");
13545 case X86::ATOMAND6432:
13546 case X86::ATOMOR6432:
13547 case X86::ATOMXOR6432:
13548 case X86::ATOMADD6432:
13549 case X86::ATOMSUB6432: {
13551 unsigned LoOpc = getNonAtomic6432Opcode(Opc, HiOpc);
13552 BuildMI(mainMBB, DL, TII->get(LoOpc), t2L).addReg(t4L)
13554 BuildMI(mainMBB, DL, TII->get(HiOpc), t2H).addReg(t4H)
13558 case X86::ATOMNAND6432: {
13559 unsigned HiOpc, NOTOpc;
13560 unsigned LoOpc = getNonAtomic6432OpcodeWithExtraOpc(Opc, HiOpc, NOTOpc);
13561 unsigned TmpL = MRI.createVirtualRegister(RC);
13562 unsigned TmpH = MRI.createVirtualRegister(RC);
13563 BuildMI(mainMBB, DL, TII->get(LoOpc), TmpL).addReg(SrcLoReg)
13565 BuildMI(mainMBB, DL, TII->get(HiOpc), TmpH).addReg(SrcHiReg)
13567 BuildMI(mainMBB, DL, TII->get(NOTOpc), t2L).addReg(TmpL);
13568 BuildMI(mainMBB, DL, TII->get(NOTOpc), t2H).addReg(TmpH);
13571 case X86::ATOMMAX6432:
13572 case X86::ATOMMIN6432:
13573 case X86::ATOMUMAX6432:
13574 case X86::ATOMUMIN6432: {
13576 unsigned LoOpc = getNonAtomic6432Opcode(Opc, HiOpc);
13577 unsigned cL = MRI.createVirtualRegister(RC8);
13578 unsigned cH = MRI.createVirtualRegister(RC8);
13579 unsigned cL32 = MRI.createVirtualRegister(RC);
13580 unsigned cH32 = MRI.createVirtualRegister(RC);
13581 unsigned cc = MRI.createVirtualRegister(RC);
13582 // cl := cmp src_lo, lo
13583 BuildMI(mainMBB, DL, TII->get(X86::CMP32rr))
13584 .addReg(SrcLoReg).addReg(t4L);
13585 BuildMI(mainMBB, DL, TII->get(LoOpc), cL);
13586 BuildMI(mainMBB, DL, TII->get(X86::MOVZX32rr8), cL32).addReg(cL);
13587 // ch := cmp src_hi, hi
13588 BuildMI(mainMBB, DL, TII->get(X86::CMP32rr))
13589 .addReg(SrcHiReg).addReg(t4H);
13590 BuildMI(mainMBB, DL, TII->get(HiOpc), cH);
13591 BuildMI(mainMBB, DL, TII->get(X86::MOVZX32rr8), cH32).addReg(cH);
13592 // cc := if (src_hi == hi) ? cl : ch;
13593 if (Subtarget->hasCMov()) {
13594 BuildMI(mainMBB, DL, TII->get(X86::CMOVE32rr), cc)
13595 .addReg(cH32).addReg(cL32);
13597 MIB = BuildMI(mainMBB, DL, TII->get(X86::CMOV_GR32), cc)
13598 .addReg(cH32).addReg(cL32)
13599 .addImm(X86::COND_E);
13600 mainMBB = EmitLoweredSelect(MIB, mainMBB);
13602 BuildMI(mainMBB, DL, TII->get(X86::TEST32rr)).addReg(cc).addReg(cc);
13603 if (Subtarget->hasCMov()) {
13604 BuildMI(mainMBB, DL, TII->get(X86::CMOVNE32rr), t2L)
13605 .addReg(SrcLoReg).addReg(t4L);
13606 BuildMI(mainMBB, DL, TII->get(X86::CMOVNE32rr), t2H)
13607 .addReg(SrcHiReg).addReg(t4H);
13609 MIB = BuildMI(mainMBB, DL, TII->get(X86::CMOV_GR32), t2L)
13610 .addReg(SrcLoReg).addReg(t4L)
13611 .addImm(X86::COND_NE);
13612 mainMBB = EmitLoweredSelect(MIB, mainMBB);
13613 // As the lowered CMOV won't clobber EFLAGS, we could reuse it for the
13614 // 2nd CMOV lowering.
13615 mainMBB->addLiveIn(X86::EFLAGS);
13616 MIB = BuildMI(mainMBB, DL, TII->get(X86::CMOV_GR32), t2H)
13617 .addReg(SrcHiReg).addReg(t4H)
13618 .addImm(X86::COND_NE);
13619 mainMBB = EmitLoweredSelect(MIB, mainMBB);
13620 // Replace the original PHI node as mainMBB is changed after CMOV
13622 BuildMI(*origMainMBB, PhiL, DL, TII->get(X86::PHI), t4L)
13623 .addReg(t1L).addMBB(thisMBB).addReg(t3L).addMBB(mainMBB);
13624 BuildMI(*origMainMBB, PhiH, DL, TII->get(X86::PHI), t4H)
13625 .addReg(t1H).addMBB(thisMBB).addReg(t3H).addMBB(mainMBB);
13626 PhiL->eraseFromParent();
13627 PhiH->eraseFromParent();
13631 case X86::ATOMSWAP6432: {
13633 unsigned LoOpc = getNonAtomic6432Opcode(Opc, HiOpc);
13634 BuildMI(mainMBB, DL, TII->get(LoOpc), t2L).addReg(SrcLoReg);
13635 BuildMI(mainMBB, DL, TII->get(HiOpc), t2H).addReg(SrcHiReg);
13640 // Copy EDX:EAX back from HiReg:LoReg
13641 BuildMI(mainMBB, DL, TII->get(TargetOpcode::COPY), X86::EAX).addReg(t4L);
13642 BuildMI(mainMBB, DL, TII->get(TargetOpcode::COPY), X86::EDX).addReg(t4H);
13643 // Copy ECX:EBX from t1H:t1L
13644 BuildMI(mainMBB, DL, TII->get(TargetOpcode::COPY), X86::EBX).addReg(t2L);
13645 BuildMI(mainMBB, DL, TII->get(TargetOpcode::COPY), X86::ECX).addReg(t2H);
13647 MIB = BuildMI(mainMBB, DL, TII->get(LCMPXCHGOpc));
13648 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
13649 MachineOperand NewMO = MI->getOperand(MemOpndSlot + i);
13651 NewMO.setIsKill(false);
13652 MIB.addOperand(NewMO);
13654 MIB.setMemRefs(MMOBegin, MMOEnd);
13656 // Copy EDX:EAX back to t3H:t3L
13657 BuildMI(mainMBB, DL, TII->get(TargetOpcode::COPY), t3L).addReg(X86::EAX);
13658 BuildMI(mainMBB, DL, TII->get(TargetOpcode::COPY), t3H).addReg(X86::EDX);
13660 BuildMI(mainMBB, DL, TII->get(X86::JNE_4)).addMBB(origMainMBB);
13662 mainMBB->addSuccessor(origMainMBB);
13663 mainMBB->addSuccessor(sinkMBB);
13666 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
13667 TII->get(TargetOpcode::COPY), DstLoReg)
13669 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
13670 TII->get(TargetOpcode::COPY), DstHiReg)
13673 MI->eraseFromParent();
13677 // FIXME: When we get size specific XMM0 registers, i.e. XMM0_V16I8
13678 // or XMM0_V32I8 in AVX all of this code can be replaced with that
13679 // in the .td file.
13680 static MachineBasicBlock *EmitPCMPSTRM(MachineInstr *MI, MachineBasicBlock *BB,
13681 const TargetInstrInfo *TII) {
13683 switch (MI->getOpcode()) {
13684 default: llvm_unreachable("illegal opcode!");
13685 case X86::PCMPISTRM128REG: Opc = X86::PCMPISTRM128rr; break;
13686 case X86::VPCMPISTRM128REG: Opc = X86::VPCMPISTRM128rr; break;
13687 case X86::PCMPISTRM128MEM: Opc = X86::PCMPISTRM128rm; break;
13688 case X86::VPCMPISTRM128MEM: Opc = X86::VPCMPISTRM128rm; break;
13689 case X86::PCMPESTRM128REG: Opc = X86::PCMPESTRM128rr; break;
13690 case X86::VPCMPESTRM128REG: Opc = X86::VPCMPESTRM128rr; break;
13691 case X86::PCMPESTRM128MEM: Opc = X86::PCMPESTRM128rm; break;
13692 case X86::VPCMPESTRM128MEM: Opc = X86::VPCMPESTRM128rm; break;
13695 DebugLoc dl = MI->getDebugLoc();
13696 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(Opc));
13698 unsigned NumArgs = MI->getNumOperands();
13699 for (unsigned i = 1; i < NumArgs; ++i) {
13700 MachineOperand &Op = MI->getOperand(i);
13701 if (!(Op.isReg() && Op.isImplicit()))
13702 MIB.addOperand(Op);
13704 if (MI->hasOneMemOperand())
13705 MIB->setMemRefs(MI->memoperands_begin(), MI->memoperands_end());
13707 BuildMI(*BB, MI, dl,
13708 TII->get(TargetOpcode::COPY), MI->getOperand(0).getReg())
13709 .addReg(X86::XMM0);
13711 MI->eraseFromParent();
13715 // FIXME: Custom handling because TableGen doesn't support multiple implicit
13716 // defs in an instruction pattern
13717 static MachineBasicBlock *EmitPCMPSTRI(MachineInstr *MI, MachineBasicBlock *BB,
13718 const TargetInstrInfo *TII) {
13720 switch (MI->getOpcode()) {
13721 default: llvm_unreachable("illegal opcode!");
13722 case X86::PCMPISTRIREG: Opc = X86::PCMPISTRIrr; break;
13723 case X86::VPCMPISTRIREG: Opc = X86::VPCMPISTRIrr; break;
13724 case X86::PCMPISTRIMEM: Opc = X86::PCMPISTRIrm; break;
13725 case X86::VPCMPISTRIMEM: Opc = X86::VPCMPISTRIrm; break;
13726 case X86::PCMPESTRIREG: Opc = X86::PCMPESTRIrr; break;
13727 case X86::VPCMPESTRIREG: Opc = X86::VPCMPESTRIrr; break;
13728 case X86::PCMPESTRIMEM: Opc = X86::PCMPESTRIrm; break;
13729 case X86::VPCMPESTRIMEM: Opc = X86::VPCMPESTRIrm; break;
13732 DebugLoc dl = MI->getDebugLoc();
13733 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(Opc));
13735 unsigned NumArgs = MI->getNumOperands(); // remove the results
13736 for (unsigned i = 1; i < NumArgs; ++i) {
13737 MachineOperand &Op = MI->getOperand(i);
13738 if (!(Op.isReg() && Op.isImplicit()))
13739 MIB.addOperand(Op);
13741 if (MI->hasOneMemOperand())
13742 MIB->setMemRefs(MI->memoperands_begin(), MI->memoperands_end());
13744 BuildMI(*BB, MI, dl,
13745 TII->get(TargetOpcode::COPY), MI->getOperand(0).getReg())
13748 MI->eraseFromParent();
13752 static MachineBasicBlock * EmitMonitor(MachineInstr *MI, MachineBasicBlock *BB,
13753 const TargetInstrInfo *TII,
13754 const X86Subtarget* Subtarget) {
13755 DebugLoc dl = MI->getDebugLoc();
13757 // Address into RAX/EAX, other two args into ECX, EDX.
13758 unsigned MemOpc = Subtarget->is64Bit() ? X86::LEA64r : X86::LEA32r;
13759 unsigned MemReg = Subtarget->is64Bit() ? X86::RAX : X86::EAX;
13760 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(MemOpc), MemReg);
13761 for (int i = 0; i < X86::AddrNumOperands; ++i)
13762 MIB.addOperand(MI->getOperand(i));
13764 unsigned ValOps = X86::AddrNumOperands;
13765 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::ECX)
13766 .addReg(MI->getOperand(ValOps).getReg());
13767 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::EDX)
13768 .addReg(MI->getOperand(ValOps+1).getReg());
13770 // The instruction doesn't actually take any operands though.
13771 BuildMI(*BB, MI, dl, TII->get(X86::MONITORrrr));
13773 MI->eraseFromParent(); // The pseudo is gone now.
13777 MachineBasicBlock *
13778 X86TargetLowering::EmitVAARG64WithCustomInserter(
13780 MachineBasicBlock *MBB) const {
13781 // Emit va_arg instruction on X86-64.
13783 // Operands to this pseudo-instruction:
13784 // 0 ) Output : destination address (reg)
13785 // 1-5) Input : va_list address (addr, i64mem)
13786 // 6 ) ArgSize : Size (in bytes) of vararg type
13787 // 7 ) ArgMode : 0=overflow only, 1=use gp_offset, 2=use fp_offset
13788 // 8 ) Align : Alignment of type
13789 // 9 ) EFLAGS (implicit-def)
13791 assert(MI->getNumOperands() == 10 && "VAARG_64 should have 10 operands!");
13792 assert(X86::AddrNumOperands == 5 && "VAARG_64 assumes 5 address operands");
13794 unsigned DestReg = MI->getOperand(0).getReg();
13795 MachineOperand &Base = MI->getOperand(1);
13796 MachineOperand &Scale = MI->getOperand(2);
13797 MachineOperand &Index = MI->getOperand(3);
13798 MachineOperand &Disp = MI->getOperand(4);
13799 MachineOperand &Segment = MI->getOperand(5);
13800 unsigned ArgSize = MI->getOperand(6).getImm();
13801 unsigned ArgMode = MI->getOperand(7).getImm();
13802 unsigned Align = MI->getOperand(8).getImm();
13804 // Memory Reference
13805 assert(MI->hasOneMemOperand() && "Expected VAARG_64 to have one memoperand");
13806 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
13807 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
13809 // Machine Information
13810 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
13811 MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo();
13812 const TargetRegisterClass *AddrRegClass = getRegClassFor(MVT::i64);
13813 const TargetRegisterClass *OffsetRegClass = getRegClassFor(MVT::i32);
13814 DebugLoc DL = MI->getDebugLoc();
13816 // struct va_list {
13819 // i64 overflow_area (address)
13820 // i64 reg_save_area (address)
13822 // sizeof(va_list) = 24
13823 // alignment(va_list) = 8
13825 unsigned TotalNumIntRegs = 6;
13826 unsigned TotalNumXMMRegs = 8;
13827 bool UseGPOffset = (ArgMode == 1);
13828 bool UseFPOffset = (ArgMode == 2);
13829 unsigned MaxOffset = TotalNumIntRegs * 8 +
13830 (UseFPOffset ? TotalNumXMMRegs * 16 : 0);
13832 /* Align ArgSize to a multiple of 8 */
13833 unsigned ArgSizeA8 = (ArgSize + 7) & ~7;
13834 bool NeedsAlign = (Align > 8);
13836 MachineBasicBlock *thisMBB = MBB;
13837 MachineBasicBlock *overflowMBB;
13838 MachineBasicBlock *offsetMBB;
13839 MachineBasicBlock *endMBB;
13841 unsigned OffsetDestReg = 0; // Argument address computed by offsetMBB
13842 unsigned OverflowDestReg = 0; // Argument address computed by overflowMBB
13843 unsigned OffsetReg = 0;
13845 if (!UseGPOffset && !UseFPOffset) {
13846 // If we only pull from the overflow region, we don't create a branch.
13847 // We don't need to alter control flow.
13848 OffsetDestReg = 0; // unused
13849 OverflowDestReg = DestReg;
13852 overflowMBB = thisMBB;
13855 // First emit code to check if gp_offset (or fp_offset) is below the bound.
13856 // If so, pull the argument from reg_save_area. (branch to offsetMBB)
13857 // If not, pull from overflow_area. (branch to overflowMBB)
13862 // offsetMBB overflowMBB
13867 // Registers for the PHI in endMBB
13868 OffsetDestReg = MRI.createVirtualRegister(AddrRegClass);
13869 OverflowDestReg = MRI.createVirtualRegister(AddrRegClass);
13871 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
13872 MachineFunction *MF = MBB->getParent();
13873 overflowMBB = MF->CreateMachineBasicBlock(LLVM_BB);
13874 offsetMBB = MF->CreateMachineBasicBlock(LLVM_BB);
13875 endMBB = MF->CreateMachineBasicBlock(LLVM_BB);
13877 MachineFunction::iterator MBBIter = MBB;
13880 // Insert the new basic blocks
13881 MF->insert(MBBIter, offsetMBB);
13882 MF->insert(MBBIter, overflowMBB);
13883 MF->insert(MBBIter, endMBB);
13885 // Transfer the remainder of MBB and its successor edges to endMBB.
13886 endMBB->splice(endMBB->begin(), thisMBB,
13887 llvm::next(MachineBasicBlock::iterator(MI)),
13889 endMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
13891 // Make offsetMBB and overflowMBB successors of thisMBB
13892 thisMBB->addSuccessor(offsetMBB);
13893 thisMBB->addSuccessor(overflowMBB);
13895 // endMBB is a successor of both offsetMBB and overflowMBB
13896 offsetMBB->addSuccessor(endMBB);
13897 overflowMBB->addSuccessor(endMBB);
13899 // Load the offset value into a register
13900 OffsetReg = MRI.createVirtualRegister(OffsetRegClass);
13901 BuildMI(thisMBB, DL, TII->get(X86::MOV32rm), OffsetReg)
13905 .addDisp(Disp, UseFPOffset ? 4 : 0)
13906 .addOperand(Segment)
13907 .setMemRefs(MMOBegin, MMOEnd);
13909 // Check if there is enough room left to pull this argument.
13910 BuildMI(thisMBB, DL, TII->get(X86::CMP32ri))
13912 .addImm(MaxOffset + 8 - ArgSizeA8);
13914 // Branch to "overflowMBB" if offset >= max
13915 // Fall through to "offsetMBB" otherwise
13916 BuildMI(thisMBB, DL, TII->get(X86::GetCondBranchFromCond(X86::COND_AE)))
13917 .addMBB(overflowMBB);
13920 // In offsetMBB, emit code to use the reg_save_area.
13922 assert(OffsetReg != 0);
13924 // Read the reg_save_area address.
13925 unsigned RegSaveReg = MRI.createVirtualRegister(AddrRegClass);
13926 BuildMI(offsetMBB, DL, TII->get(X86::MOV64rm), RegSaveReg)
13931 .addOperand(Segment)
13932 .setMemRefs(MMOBegin, MMOEnd);
13934 // Zero-extend the offset
13935 unsigned OffsetReg64 = MRI.createVirtualRegister(AddrRegClass);
13936 BuildMI(offsetMBB, DL, TII->get(X86::SUBREG_TO_REG), OffsetReg64)
13939 .addImm(X86::sub_32bit);
13941 // Add the offset to the reg_save_area to get the final address.
13942 BuildMI(offsetMBB, DL, TII->get(X86::ADD64rr), OffsetDestReg)
13943 .addReg(OffsetReg64)
13944 .addReg(RegSaveReg);
13946 // Compute the offset for the next argument
13947 unsigned NextOffsetReg = MRI.createVirtualRegister(OffsetRegClass);
13948 BuildMI(offsetMBB, DL, TII->get(X86::ADD32ri), NextOffsetReg)
13950 .addImm(UseFPOffset ? 16 : 8);
13952 // Store it back into the va_list.
13953 BuildMI(offsetMBB, DL, TII->get(X86::MOV32mr))
13957 .addDisp(Disp, UseFPOffset ? 4 : 0)
13958 .addOperand(Segment)
13959 .addReg(NextOffsetReg)
13960 .setMemRefs(MMOBegin, MMOEnd);
13963 BuildMI(offsetMBB, DL, TII->get(X86::JMP_4))
13968 // Emit code to use overflow area
13971 // Load the overflow_area address into a register.
13972 unsigned OverflowAddrReg = MRI.createVirtualRegister(AddrRegClass);
13973 BuildMI(overflowMBB, DL, TII->get(X86::MOV64rm), OverflowAddrReg)
13978 .addOperand(Segment)
13979 .setMemRefs(MMOBegin, MMOEnd);
13981 // If we need to align it, do so. Otherwise, just copy the address
13982 // to OverflowDestReg.
13984 // Align the overflow address
13985 assert((Align & (Align-1)) == 0 && "Alignment must be a power of 2");
13986 unsigned TmpReg = MRI.createVirtualRegister(AddrRegClass);
13988 // aligned_addr = (addr + (align-1)) & ~(align-1)
13989 BuildMI(overflowMBB, DL, TII->get(X86::ADD64ri32), TmpReg)
13990 .addReg(OverflowAddrReg)
13993 BuildMI(overflowMBB, DL, TII->get(X86::AND64ri32), OverflowDestReg)
13995 .addImm(~(uint64_t)(Align-1));
13997 BuildMI(overflowMBB, DL, TII->get(TargetOpcode::COPY), OverflowDestReg)
13998 .addReg(OverflowAddrReg);
14001 // Compute the next overflow address after this argument.
14002 // (the overflow address should be kept 8-byte aligned)
14003 unsigned NextAddrReg = MRI.createVirtualRegister(AddrRegClass);
14004 BuildMI(overflowMBB, DL, TII->get(X86::ADD64ri32), NextAddrReg)
14005 .addReg(OverflowDestReg)
14006 .addImm(ArgSizeA8);
14008 // Store the new overflow address.
14009 BuildMI(overflowMBB, DL, TII->get(X86::MOV64mr))
14014 .addOperand(Segment)
14015 .addReg(NextAddrReg)
14016 .setMemRefs(MMOBegin, MMOEnd);
14018 // If we branched, emit the PHI to the front of endMBB.
14020 BuildMI(*endMBB, endMBB->begin(), DL,
14021 TII->get(X86::PHI), DestReg)
14022 .addReg(OffsetDestReg).addMBB(offsetMBB)
14023 .addReg(OverflowDestReg).addMBB(overflowMBB);
14026 // Erase the pseudo instruction
14027 MI->eraseFromParent();
14032 MachineBasicBlock *
14033 X86TargetLowering::EmitVAStartSaveXMMRegsWithCustomInserter(
14035 MachineBasicBlock *MBB) const {
14036 // Emit code to save XMM registers to the stack. The ABI says that the
14037 // number of registers to save is given in %al, so it's theoretically
14038 // possible to do an indirect jump trick to avoid saving all of them,
14039 // however this code takes a simpler approach and just executes all
14040 // of the stores if %al is non-zero. It's less code, and it's probably
14041 // easier on the hardware branch predictor, and stores aren't all that
14042 // expensive anyway.
14044 // Create the new basic blocks. One block contains all the XMM stores,
14045 // and one block is the final destination regardless of whether any
14046 // stores were performed.
14047 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
14048 MachineFunction *F = MBB->getParent();
14049 MachineFunction::iterator MBBIter = MBB;
14051 MachineBasicBlock *XMMSaveMBB = F->CreateMachineBasicBlock(LLVM_BB);
14052 MachineBasicBlock *EndMBB = F->CreateMachineBasicBlock(LLVM_BB);
14053 F->insert(MBBIter, XMMSaveMBB);
14054 F->insert(MBBIter, EndMBB);
14056 // Transfer the remainder of MBB and its successor edges to EndMBB.
14057 EndMBB->splice(EndMBB->begin(), MBB,
14058 llvm::next(MachineBasicBlock::iterator(MI)),
14060 EndMBB->transferSuccessorsAndUpdatePHIs(MBB);
14062 // The original block will now fall through to the XMM save block.
14063 MBB->addSuccessor(XMMSaveMBB);
14064 // The XMMSaveMBB will fall through to the end block.
14065 XMMSaveMBB->addSuccessor(EndMBB);
14067 // Now add the instructions.
14068 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
14069 DebugLoc DL = MI->getDebugLoc();
14071 unsigned CountReg = MI->getOperand(0).getReg();
14072 int64_t RegSaveFrameIndex = MI->getOperand(1).getImm();
14073 int64_t VarArgsFPOffset = MI->getOperand(2).getImm();
14075 if (!Subtarget->isTargetWin64()) {
14076 // If %al is 0, branch around the XMM save block.
14077 BuildMI(MBB, DL, TII->get(X86::TEST8rr)).addReg(CountReg).addReg(CountReg);
14078 BuildMI(MBB, DL, TII->get(X86::JE_4)).addMBB(EndMBB);
14079 MBB->addSuccessor(EndMBB);
14082 unsigned MOVOpc = Subtarget->hasFp256() ? X86::VMOVAPSmr : X86::MOVAPSmr;
14083 // In the XMM save block, save all the XMM argument registers.
14084 for (int i = 3, e = MI->getNumOperands(); i != e; ++i) {
14085 int64_t Offset = (i - 3) * 16 + VarArgsFPOffset;
14086 MachineMemOperand *MMO =
14087 F->getMachineMemOperand(
14088 MachinePointerInfo::getFixedStack(RegSaveFrameIndex, Offset),
14089 MachineMemOperand::MOStore,
14090 /*Size=*/16, /*Align=*/16);
14091 BuildMI(XMMSaveMBB, DL, TII->get(MOVOpc))
14092 .addFrameIndex(RegSaveFrameIndex)
14093 .addImm(/*Scale=*/1)
14094 .addReg(/*IndexReg=*/0)
14095 .addImm(/*Disp=*/Offset)
14096 .addReg(/*Segment=*/0)
14097 .addReg(MI->getOperand(i).getReg())
14098 .addMemOperand(MMO);
14101 MI->eraseFromParent(); // The pseudo instruction is gone now.
14106 // The EFLAGS operand of SelectItr might be missing a kill marker
14107 // because there were multiple uses of EFLAGS, and ISel didn't know
14108 // which to mark. Figure out whether SelectItr should have had a
14109 // kill marker, and set it if it should. Returns the correct kill
14111 static bool checkAndUpdateEFLAGSKill(MachineBasicBlock::iterator SelectItr,
14112 MachineBasicBlock* BB,
14113 const TargetRegisterInfo* TRI) {
14114 // Scan forward through BB for a use/def of EFLAGS.
14115 MachineBasicBlock::iterator miI(llvm::next(SelectItr));
14116 for (MachineBasicBlock::iterator miE = BB->end(); miI != miE; ++miI) {
14117 const MachineInstr& mi = *miI;
14118 if (mi.readsRegister(X86::EFLAGS))
14120 if (mi.definesRegister(X86::EFLAGS))
14121 break; // Should have kill-flag - update below.
14124 // If we hit the end of the block, check whether EFLAGS is live into a
14126 if (miI == BB->end()) {
14127 for (MachineBasicBlock::succ_iterator sItr = BB->succ_begin(),
14128 sEnd = BB->succ_end();
14129 sItr != sEnd; ++sItr) {
14130 MachineBasicBlock* succ = *sItr;
14131 if (succ->isLiveIn(X86::EFLAGS))
14136 // We found a def, or hit the end of the basic block and EFLAGS wasn't live
14137 // out. SelectMI should have a kill flag on EFLAGS.
14138 SelectItr->addRegisterKilled(X86::EFLAGS, TRI);
14142 MachineBasicBlock *
14143 X86TargetLowering::EmitLoweredSelect(MachineInstr *MI,
14144 MachineBasicBlock *BB) const {
14145 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
14146 DebugLoc DL = MI->getDebugLoc();
14148 // To "insert" a SELECT_CC instruction, we actually have to insert the
14149 // diamond control-flow pattern. The incoming instruction knows the
14150 // destination vreg to set, the condition code register to branch on, the
14151 // true/false values to select between, and a branch opcode to use.
14152 const BasicBlock *LLVM_BB = BB->getBasicBlock();
14153 MachineFunction::iterator It = BB;
14159 // cmpTY ccX, r1, r2
14161 // fallthrough --> copy0MBB
14162 MachineBasicBlock *thisMBB = BB;
14163 MachineFunction *F = BB->getParent();
14164 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
14165 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
14166 F->insert(It, copy0MBB);
14167 F->insert(It, sinkMBB);
14169 // If the EFLAGS register isn't dead in the terminator, then claim that it's
14170 // live into the sink and copy blocks.
14171 const TargetRegisterInfo* TRI = getTargetMachine().getRegisterInfo();
14172 if (!MI->killsRegister(X86::EFLAGS) &&
14173 !checkAndUpdateEFLAGSKill(MI, BB, TRI)) {
14174 copy0MBB->addLiveIn(X86::EFLAGS);
14175 sinkMBB->addLiveIn(X86::EFLAGS);
14178 // Transfer the remainder of BB and its successor edges to sinkMBB.
14179 sinkMBB->splice(sinkMBB->begin(), BB,
14180 llvm::next(MachineBasicBlock::iterator(MI)),
14182 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
14184 // Add the true and fallthrough blocks as its successors.
14185 BB->addSuccessor(copy0MBB);
14186 BB->addSuccessor(sinkMBB);
14188 // Create the conditional branch instruction.
14190 X86::GetCondBranchFromCond((X86::CondCode)MI->getOperand(3).getImm());
14191 BuildMI(BB, DL, TII->get(Opc)).addMBB(sinkMBB);
14194 // %FalseValue = ...
14195 // # fallthrough to sinkMBB
14196 copy0MBB->addSuccessor(sinkMBB);
14199 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
14201 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
14202 TII->get(X86::PHI), MI->getOperand(0).getReg())
14203 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
14204 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
14206 MI->eraseFromParent(); // The pseudo instruction is gone now.
14210 MachineBasicBlock *
14211 X86TargetLowering::EmitLoweredSegAlloca(MachineInstr *MI, MachineBasicBlock *BB,
14212 bool Is64Bit) const {
14213 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
14214 DebugLoc DL = MI->getDebugLoc();
14215 MachineFunction *MF = BB->getParent();
14216 const BasicBlock *LLVM_BB = BB->getBasicBlock();
14218 assert(getTargetMachine().Options.EnableSegmentedStacks);
14220 unsigned TlsReg = Is64Bit ? X86::FS : X86::GS;
14221 unsigned TlsOffset = Is64Bit ? 0x70 : 0x30;
14224 // ... [Till the alloca]
14225 // If stacklet is not large enough, jump to mallocMBB
14228 // Allocate by subtracting from RSP
14229 // Jump to continueMBB
14232 // Allocate by call to runtime
14236 // [rest of original BB]
14239 MachineBasicBlock *mallocMBB = MF->CreateMachineBasicBlock(LLVM_BB);
14240 MachineBasicBlock *bumpMBB = MF->CreateMachineBasicBlock(LLVM_BB);
14241 MachineBasicBlock *continueMBB = MF->CreateMachineBasicBlock(LLVM_BB);
14243 MachineRegisterInfo &MRI = MF->getRegInfo();
14244 const TargetRegisterClass *AddrRegClass =
14245 getRegClassFor(Is64Bit ? MVT::i64:MVT::i32);
14247 unsigned mallocPtrVReg = MRI.createVirtualRegister(AddrRegClass),
14248 bumpSPPtrVReg = MRI.createVirtualRegister(AddrRegClass),
14249 tmpSPVReg = MRI.createVirtualRegister(AddrRegClass),
14250 SPLimitVReg = MRI.createVirtualRegister(AddrRegClass),
14251 sizeVReg = MI->getOperand(1).getReg(),
14252 physSPReg = Is64Bit ? X86::RSP : X86::ESP;
14254 MachineFunction::iterator MBBIter = BB;
14257 MF->insert(MBBIter, bumpMBB);
14258 MF->insert(MBBIter, mallocMBB);
14259 MF->insert(MBBIter, continueMBB);
14261 continueMBB->splice(continueMBB->begin(), BB, llvm::next
14262 (MachineBasicBlock::iterator(MI)), BB->end());
14263 continueMBB->transferSuccessorsAndUpdatePHIs(BB);
14265 // Add code to the main basic block to check if the stack limit has been hit,
14266 // and if so, jump to mallocMBB otherwise to bumpMBB.
14267 BuildMI(BB, DL, TII->get(TargetOpcode::COPY), tmpSPVReg).addReg(physSPReg);
14268 BuildMI(BB, DL, TII->get(Is64Bit ? X86::SUB64rr:X86::SUB32rr), SPLimitVReg)
14269 .addReg(tmpSPVReg).addReg(sizeVReg);
14270 BuildMI(BB, DL, TII->get(Is64Bit ? X86::CMP64mr:X86::CMP32mr))
14271 .addReg(0).addImm(1).addReg(0).addImm(TlsOffset).addReg(TlsReg)
14272 .addReg(SPLimitVReg);
14273 BuildMI(BB, DL, TII->get(X86::JG_4)).addMBB(mallocMBB);
14275 // bumpMBB simply decreases the stack pointer, since we know the current
14276 // stacklet has enough space.
14277 BuildMI(bumpMBB, DL, TII->get(TargetOpcode::COPY), physSPReg)
14278 .addReg(SPLimitVReg);
14279 BuildMI(bumpMBB, DL, TII->get(TargetOpcode::COPY), bumpSPPtrVReg)
14280 .addReg(SPLimitVReg);
14281 BuildMI(bumpMBB, DL, TII->get(X86::JMP_4)).addMBB(continueMBB);
14283 // Calls into a routine in libgcc to allocate more space from the heap.
14284 const uint32_t *RegMask =
14285 getTargetMachine().getRegisterInfo()->getCallPreservedMask(CallingConv::C);
14287 BuildMI(mallocMBB, DL, TII->get(X86::MOV64rr), X86::RDI)
14289 BuildMI(mallocMBB, DL, TII->get(X86::CALL64pcrel32))
14290 .addExternalSymbol("__morestack_allocate_stack_space")
14291 .addRegMask(RegMask)
14292 .addReg(X86::RDI, RegState::Implicit)
14293 .addReg(X86::RAX, RegState::ImplicitDefine);
14295 BuildMI(mallocMBB, DL, TII->get(X86::SUB32ri), physSPReg).addReg(physSPReg)
14297 BuildMI(mallocMBB, DL, TII->get(X86::PUSH32r)).addReg(sizeVReg);
14298 BuildMI(mallocMBB, DL, TII->get(X86::CALLpcrel32))
14299 .addExternalSymbol("__morestack_allocate_stack_space")
14300 .addRegMask(RegMask)
14301 .addReg(X86::EAX, RegState::ImplicitDefine);
14305 BuildMI(mallocMBB, DL, TII->get(X86::ADD32ri), physSPReg).addReg(physSPReg)
14308 BuildMI(mallocMBB, DL, TII->get(TargetOpcode::COPY), mallocPtrVReg)
14309 .addReg(Is64Bit ? X86::RAX : X86::EAX);
14310 BuildMI(mallocMBB, DL, TII->get(X86::JMP_4)).addMBB(continueMBB);
14312 // Set up the CFG correctly.
14313 BB->addSuccessor(bumpMBB);
14314 BB->addSuccessor(mallocMBB);
14315 mallocMBB->addSuccessor(continueMBB);
14316 bumpMBB->addSuccessor(continueMBB);
14318 // Take care of the PHI nodes.
14319 BuildMI(*continueMBB, continueMBB->begin(), DL, TII->get(X86::PHI),
14320 MI->getOperand(0).getReg())
14321 .addReg(mallocPtrVReg).addMBB(mallocMBB)
14322 .addReg(bumpSPPtrVReg).addMBB(bumpMBB);
14324 // Delete the original pseudo instruction.
14325 MI->eraseFromParent();
14328 return continueMBB;
14331 MachineBasicBlock *
14332 X86TargetLowering::EmitLoweredWinAlloca(MachineInstr *MI,
14333 MachineBasicBlock *BB) const {
14334 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
14335 DebugLoc DL = MI->getDebugLoc();
14337 assert(!Subtarget->isTargetEnvMacho());
14339 // The lowering is pretty easy: we're just emitting the call to _alloca. The
14340 // non-trivial part is impdef of ESP.
14342 if (Subtarget->isTargetWin64()) {
14343 if (Subtarget->isTargetCygMing()) {
14344 // ___chkstk(Mingw64):
14345 // Clobbers R10, R11, RAX and EFLAGS.
14347 BuildMI(*BB, MI, DL, TII->get(X86::W64ALLOCA))
14348 .addExternalSymbol("___chkstk")
14349 .addReg(X86::RAX, RegState::Implicit)
14350 .addReg(X86::RSP, RegState::Implicit)
14351 .addReg(X86::RAX, RegState::Define | RegState::Implicit)
14352 .addReg(X86::RSP, RegState::Define | RegState::Implicit)
14353 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
14355 // __chkstk(MSVCRT): does not update stack pointer.
14356 // Clobbers R10, R11 and EFLAGS.
14357 // FIXME: RAX(allocated size) might be reused and not killed.
14358 BuildMI(*BB, MI, DL, TII->get(X86::W64ALLOCA))
14359 .addExternalSymbol("__chkstk")
14360 .addReg(X86::RAX, RegState::Implicit)
14361 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
14362 // RAX has the offset to subtracted from RSP.
14363 BuildMI(*BB, MI, DL, TII->get(X86::SUB64rr), X86::RSP)
14368 const char *StackProbeSymbol =
14369 Subtarget->isTargetWindows() ? "_chkstk" : "_alloca";
14371 BuildMI(*BB, MI, DL, TII->get(X86::CALLpcrel32))
14372 .addExternalSymbol(StackProbeSymbol)
14373 .addReg(X86::EAX, RegState::Implicit)
14374 .addReg(X86::ESP, RegState::Implicit)
14375 .addReg(X86::EAX, RegState::Define | RegState::Implicit)
14376 .addReg(X86::ESP, RegState::Define | RegState::Implicit)
14377 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
14380 MI->eraseFromParent(); // The pseudo instruction is gone now.
14384 MachineBasicBlock *
14385 X86TargetLowering::EmitLoweredTLSCall(MachineInstr *MI,
14386 MachineBasicBlock *BB) const {
14387 // This is pretty easy. We're taking the value that we received from
14388 // our load from the relocation, sticking it in either RDI (x86-64)
14389 // or EAX and doing an indirect call. The return value will then
14390 // be in the normal return register.
14391 const X86InstrInfo *TII
14392 = static_cast<const X86InstrInfo*>(getTargetMachine().getInstrInfo());
14393 DebugLoc DL = MI->getDebugLoc();
14394 MachineFunction *F = BB->getParent();
14396 assert(Subtarget->isTargetDarwin() && "Darwin only instr emitted?");
14397 assert(MI->getOperand(3).isGlobal() && "This should be a global");
14399 // Get a register mask for the lowered call.
14400 // FIXME: The 32-bit calls have non-standard calling conventions. Use a
14401 // proper register mask.
14402 const uint32_t *RegMask =
14403 getTargetMachine().getRegisterInfo()->getCallPreservedMask(CallingConv::C);
14404 if (Subtarget->is64Bit()) {
14405 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
14406 TII->get(X86::MOV64rm), X86::RDI)
14408 .addImm(0).addReg(0)
14409 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
14410 MI->getOperand(3).getTargetFlags())
14412 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL64m));
14413 addDirectMem(MIB, X86::RDI);
14414 MIB.addReg(X86::RAX, RegState::ImplicitDefine).addRegMask(RegMask);
14415 } else if (getTargetMachine().getRelocationModel() != Reloc::PIC_) {
14416 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
14417 TII->get(X86::MOV32rm), X86::EAX)
14419 .addImm(0).addReg(0)
14420 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
14421 MI->getOperand(3).getTargetFlags())
14423 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m));
14424 addDirectMem(MIB, X86::EAX);
14425 MIB.addReg(X86::EAX, RegState::ImplicitDefine).addRegMask(RegMask);
14427 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
14428 TII->get(X86::MOV32rm), X86::EAX)
14429 .addReg(TII->getGlobalBaseReg(F))
14430 .addImm(0).addReg(0)
14431 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
14432 MI->getOperand(3).getTargetFlags())
14434 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m));
14435 addDirectMem(MIB, X86::EAX);
14436 MIB.addReg(X86::EAX, RegState::ImplicitDefine).addRegMask(RegMask);
14439 MI->eraseFromParent(); // The pseudo instruction is gone now.
14443 MachineBasicBlock *
14444 X86TargetLowering::emitEHSjLjSetJmp(MachineInstr *MI,
14445 MachineBasicBlock *MBB) const {
14446 DebugLoc DL = MI->getDebugLoc();
14447 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
14449 MachineFunction *MF = MBB->getParent();
14450 MachineRegisterInfo &MRI = MF->getRegInfo();
14452 const BasicBlock *BB = MBB->getBasicBlock();
14453 MachineFunction::iterator I = MBB;
14456 // Memory Reference
14457 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
14458 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
14461 unsigned MemOpndSlot = 0;
14463 unsigned CurOp = 0;
14465 DstReg = MI->getOperand(CurOp++).getReg();
14466 const TargetRegisterClass *RC = MRI.getRegClass(DstReg);
14467 assert(RC->hasType(MVT::i32) && "Invalid destination!");
14468 unsigned mainDstReg = MRI.createVirtualRegister(RC);
14469 unsigned restoreDstReg = MRI.createVirtualRegister(RC);
14471 MemOpndSlot = CurOp;
14473 MVT PVT = getPointerTy();
14474 assert((PVT == MVT::i64 || PVT == MVT::i32) &&
14475 "Invalid Pointer Size!");
14477 // For v = setjmp(buf), we generate
14480 // buf[LabelOffset] = restoreMBB
14481 // SjLjSetup restoreMBB
14487 // v = phi(main, restore)
14492 MachineBasicBlock *thisMBB = MBB;
14493 MachineBasicBlock *mainMBB = MF->CreateMachineBasicBlock(BB);
14494 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(BB);
14495 MachineBasicBlock *restoreMBB = MF->CreateMachineBasicBlock(BB);
14496 MF->insert(I, mainMBB);
14497 MF->insert(I, sinkMBB);
14498 MF->push_back(restoreMBB);
14500 MachineInstrBuilder MIB;
14502 // Transfer the remainder of BB and its successor edges to sinkMBB.
14503 sinkMBB->splice(sinkMBB->begin(), MBB,
14504 llvm::next(MachineBasicBlock::iterator(MI)), MBB->end());
14505 sinkMBB->transferSuccessorsAndUpdatePHIs(MBB);
14508 unsigned PtrStoreOpc = 0;
14509 unsigned LabelReg = 0;
14510 const int64_t LabelOffset = 1 * PVT.getStoreSize();
14511 Reloc::Model RM = getTargetMachine().getRelocationModel();
14512 bool UseImmLabel = (getTargetMachine().getCodeModel() == CodeModel::Small) &&
14513 (RM == Reloc::Static || RM == Reloc::DynamicNoPIC);
14515 // Prepare IP either in reg or imm.
14516 if (!UseImmLabel) {
14517 PtrStoreOpc = (PVT == MVT::i64) ? X86::MOV64mr : X86::MOV32mr;
14518 const TargetRegisterClass *PtrRC = getRegClassFor(PVT);
14519 LabelReg = MRI.createVirtualRegister(PtrRC);
14520 if (Subtarget->is64Bit()) {
14521 MIB = BuildMI(*thisMBB, MI, DL, TII->get(X86::LEA64r), LabelReg)
14525 .addMBB(restoreMBB)
14528 const X86InstrInfo *XII = static_cast<const X86InstrInfo*>(TII);
14529 MIB = BuildMI(*thisMBB, MI, DL, TII->get(X86::LEA32r), LabelReg)
14530 .addReg(XII->getGlobalBaseReg(MF))
14533 .addMBB(restoreMBB, Subtarget->ClassifyBlockAddressReference())
14537 PtrStoreOpc = (PVT == MVT::i64) ? X86::MOV64mi32 : X86::MOV32mi;
14539 MIB = BuildMI(*thisMBB, MI, DL, TII->get(PtrStoreOpc));
14540 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
14541 if (i == X86::AddrDisp)
14542 MIB.addDisp(MI->getOperand(MemOpndSlot + i), LabelOffset);
14544 MIB.addOperand(MI->getOperand(MemOpndSlot + i));
14547 MIB.addReg(LabelReg);
14549 MIB.addMBB(restoreMBB);
14550 MIB.setMemRefs(MMOBegin, MMOEnd);
14552 MIB = BuildMI(*thisMBB, MI, DL, TII->get(X86::EH_SjLj_Setup))
14553 .addMBB(restoreMBB);
14554 MIB.addRegMask(RegInfo->getNoPreservedMask());
14555 thisMBB->addSuccessor(mainMBB);
14556 thisMBB->addSuccessor(restoreMBB);
14560 BuildMI(mainMBB, DL, TII->get(X86::MOV32r0), mainDstReg);
14561 mainMBB->addSuccessor(sinkMBB);
14564 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
14565 TII->get(X86::PHI), DstReg)
14566 .addReg(mainDstReg).addMBB(mainMBB)
14567 .addReg(restoreDstReg).addMBB(restoreMBB);
14570 BuildMI(restoreMBB, DL, TII->get(X86::MOV32ri), restoreDstReg).addImm(1);
14571 BuildMI(restoreMBB, DL, TII->get(X86::JMP_4)).addMBB(sinkMBB);
14572 restoreMBB->addSuccessor(sinkMBB);
14574 MI->eraseFromParent();
14578 MachineBasicBlock *
14579 X86TargetLowering::emitEHSjLjLongJmp(MachineInstr *MI,
14580 MachineBasicBlock *MBB) const {
14581 DebugLoc DL = MI->getDebugLoc();
14582 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
14584 MachineFunction *MF = MBB->getParent();
14585 MachineRegisterInfo &MRI = MF->getRegInfo();
14587 // Memory Reference
14588 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
14589 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
14591 MVT PVT = getPointerTy();
14592 assert((PVT == MVT::i64 || PVT == MVT::i32) &&
14593 "Invalid Pointer Size!");
14595 const TargetRegisterClass *RC =
14596 (PVT == MVT::i64) ? &X86::GR64RegClass : &X86::GR32RegClass;
14597 unsigned Tmp = MRI.createVirtualRegister(RC);
14598 // Since FP is only updated here but NOT referenced, it's treated as GPR.
14599 unsigned FP = (PVT == MVT::i64) ? X86::RBP : X86::EBP;
14600 unsigned SP = RegInfo->getStackRegister();
14602 MachineInstrBuilder MIB;
14604 const int64_t LabelOffset = 1 * PVT.getStoreSize();
14605 const int64_t SPOffset = 2 * PVT.getStoreSize();
14607 unsigned PtrLoadOpc = (PVT == MVT::i64) ? X86::MOV64rm : X86::MOV32rm;
14608 unsigned IJmpOpc = (PVT == MVT::i64) ? X86::JMP64r : X86::JMP32r;
14611 MIB = BuildMI(*MBB, MI, DL, TII->get(PtrLoadOpc), FP);
14612 for (unsigned i = 0; i < X86::AddrNumOperands; ++i)
14613 MIB.addOperand(MI->getOperand(i));
14614 MIB.setMemRefs(MMOBegin, MMOEnd);
14616 MIB = BuildMI(*MBB, MI, DL, TII->get(PtrLoadOpc), Tmp);
14617 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
14618 if (i == X86::AddrDisp)
14619 MIB.addDisp(MI->getOperand(i), LabelOffset);
14621 MIB.addOperand(MI->getOperand(i));
14623 MIB.setMemRefs(MMOBegin, MMOEnd);
14625 MIB = BuildMI(*MBB, MI, DL, TII->get(PtrLoadOpc), SP);
14626 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
14627 if (i == X86::AddrDisp)
14628 MIB.addDisp(MI->getOperand(i), SPOffset);
14630 MIB.addOperand(MI->getOperand(i));
14632 MIB.setMemRefs(MMOBegin, MMOEnd);
14634 BuildMI(*MBB, MI, DL, TII->get(IJmpOpc)).addReg(Tmp);
14636 MI->eraseFromParent();
14640 MachineBasicBlock *
14641 X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
14642 MachineBasicBlock *BB) const {
14643 switch (MI->getOpcode()) {
14644 default: llvm_unreachable("Unexpected instr type to insert");
14645 case X86::TAILJMPd64:
14646 case X86::TAILJMPr64:
14647 case X86::TAILJMPm64:
14648 llvm_unreachable("TAILJMP64 would not be touched here.");
14649 case X86::TCRETURNdi64:
14650 case X86::TCRETURNri64:
14651 case X86::TCRETURNmi64:
14653 case X86::WIN_ALLOCA:
14654 return EmitLoweredWinAlloca(MI, BB);
14655 case X86::SEG_ALLOCA_32:
14656 return EmitLoweredSegAlloca(MI, BB, false);
14657 case X86::SEG_ALLOCA_64:
14658 return EmitLoweredSegAlloca(MI, BB, true);
14659 case X86::TLSCall_32:
14660 case X86::TLSCall_64:
14661 return EmitLoweredTLSCall(MI, BB);
14662 case X86::CMOV_GR8:
14663 case X86::CMOV_FR32:
14664 case X86::CMOV_FR64:
14665 case X86::CMOV_V4F32:
14666 case X86::CMOV_V2F64:
14667 case X86::CMOV_V2I64:
14668 case X86::CMOV_V8F32:
14669 case X86::CMOV_V4F64:
14670 case X86::CMOV_V4I64:
14671 case X86::CMOV_GR16:
14672 case X86::CMOV_GR32:
14673 case X86::CMOV_RFP32:
14674 case X86::CMOV_RFP64:
14675 case X86::CMOV_RFP80:
14676 return EmitLoweredSelect(MI, BB);
14678 case X86::FP32_TO_INT16_IN_MEM:
14679 case X86::FP32_TO_INT32_IN_MEM:
14680 case X86::FP32_TO_INT64_IN_MEM:
14681 case X86::FP64_TO_INT16_IN_MEM:
14682 case X86::FP64_TO_INT32_IN_MEM:
14683 case X86::FP64_TO_INT64_IN_MEM:
14684 case X86::FP80_TO_INT16_IN_MEM:
14685 case X86::FP80_TO_INT32_IN_MEM:
14686 case X86::FP80_TO_INT64_IN_MEM: {
14687 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
14688 DebugLoc DL = MI->getDebugLoc();
14690 // Change the floating point control register to use "round towards zero"
14691 // mode when truncating to an integer value.
14692 MachineFunction *F = BB->getParent();
14693 int CWFrameIdx = F->getFrameInfo()->CreateStackObject(2, 2, false);
14694 addFrameReference(BuildMI(*BB, MI, DL,
14695 TII->get(X86::FNSTCW16m)), CWFrameIdx);
14697 // Load the old value of the high byte of the control word...
14699 F->getRegInfo().createVirtualRegister(&X86::GR16RegClass);
14700 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16rm), OldCW),
14703 // Set the high part to be round to zero...
14704 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mi)), CWFrameIdx)
14707 // Reload the modified control word now...
14708 addFrameReference(BuildMI(*BB, MI, DL,
14709 TII->get(X86::FLDCW16m)), CWFrameIdx);
14711 // Restore the memory image of control word to original value
14712 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mr)), CWFrameIdx)
14715 // Get the X86 opcode to use.
14717 switch (MI->getOpcode()) {
14718 default: llvm_unreachable("illegal opcode!");
14719 case X86::FP32_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m32; break;
14720 case X86::FP32_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m32; break;
14721 case X86::FP32_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m32; break;
14722 case X86::FP64_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m64; break;
14723 case X86::FP64_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m64; break;
14724 case X86::FP64_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m64; break;
14725 case X86::FP80_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m80; break;
14726 case X86::FP80_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m80; break;
14727 case X86::FP80_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m80; break;
14731 MachineOperand &Op = MI->getOperand(0);
14733 AM.BaseType = X86AddressMode::RegBase;
14734 AM.Base.Reg = Op.getReg();
14736 AM.BaseType = X86AddressMode::FrameIndexBase;
14737 AM.Base.FrameIndex = Op.getIndex();
14739 Op = MI->getOperand(1);
14741 AM.Scale = Op.getImm();
14742 Op = MI->getOperand(2);
14744 AM.IndexReg = Op.getImm();
14745 Op = MI->getOperand(3);
14746 if (Op.isGlobal()) {
14747 AM.GV = Op.getGlobal();
14749 AM.Disp = Op.getImm();
14751 addFullAddress(BuildMI(*BB, MI, DL, TII->get(Opc)), AM)
14752 .addReg(MI->getOperand(X86::AddrNumOperands).getReg());
14754 // Reload the original control word now.
14755 addFrameReference(BuildMI(*BB, MI, DL,
14756 TII->get(X86::FLDCW16m)), CWFrameIdx);
14758 MI->eraseFromParent(); // The pseudo instruction is gone now.
14761 // String/text processing lowering.
14762 case X86::PCMPISTRM128REG:
14763 case X86::VPCMPISTRM128REG:
14764 case X86::PCMPISTRM128MEM:
14765 case X86::VPCMPISTRM128MEM:
14766 case X86::PCMPESTRM128REG:
14767 case X86::VPCMPESTRM128REG:
14768 case X86::PCMPESTRM128MEM:
14769 case X86::VPCMPESTRM128MEM:
14770 assert(Subtarget->hasSSE42() &&
14771 "Target must have SSE4.2 or AVX features enabled");
14772 return EmitPCMPSTRM(MI, BB, getTargetMachine().getInstrInfo());
14774 // String/text processing lowering.
14775 case X86::PCMPISTRIREG:
14776 case X86::VPCMPISTRIREG:
14777 case X86::PCMPISTRIMEM:
14778 case X86::VPCMPISTRIMEM:
14779 case X86::PCMPESTRIREG:
14780 case X86::VPCMPESTRIREG:
14781 case X86::PCMPESTRIMEM:
14782 case X86::VPCMPESTRIMEM:
14783 assert(Subtarget->hasSSE42() &&
14784 "Target must have SSE4.2 or AVX features enabled");
14785 return EmitPCMPSTRI(MI, BB, getTargetMachine().getInstrInfo());
14787 // Thread synchronization.
14789 return EmitMonitor(MI, BB, getTargetMachine().getInstrInfo(), Subtarget);
14793 return EmitXBegin(MI, BB, getTargetMachine().getInstrInfo());
14795 // Atomic Lowering.
14796 case X86::ATOMAND8:
14797 case X86::ATOMAND16:
14798 case X86::ATOMAND32:
14799 case X86::ATOMAND64:
14802 case X86::ATOMOR16:
14803 case X86::ATOMOR32:
14804 case X86::ATOMOR64:
14806 case X86::ATOMXOR16:
14807 case X86::ATOMXOR8:
14808 case X86::ATOMXOR32:
14809 case X86::ATOMXOR64:
14811 case X86::ATOMNAND8:
14812 case X86::ATOMNAND16:
14813 case X86::ATOMNAND32:
14814 case X86::ATOMNAND64:
14816 case X86::ATOMMAX8:
14817 case X86::ATOMMAX16:
14818 case X86::ATOMMAX32:
14819 case X86::ATOMMAX64:
14821 case X86::ATOMMIN8:
14822 case X86::ATOMMIN16:
14823 case X86::ATOMMIN32:
14824 case X86::ATOMMIN64:
14826 case X86::ATOMUMAX8:
14827 case X86::ATOMUMAX16:
14828 case X86::ATOMUMAX32:
14829 case X86::ATOMUMAX64:
14831 case X86::ATOMUMIN8:
14832 case X86::ATOMUMIN16:
14833 case X86::ATOMUMIN32:
14834 case X86::ATOMUMIN64:
14835 return EmitAtomicLoadArith(MI, BB);
14837 // This group does 64-bit operations on a 32-bit host.
14838 case X86::ATOMAND6432:
14839 case X86::ATOMOR6432:
14840 case X86::ATOMXOR6432:
14841 case X86::ATOMNAND6432:
14842 case X86::ATOMADD6432:
14843 case X86::ATOMSUB6432:
14844 case X86::ATOMMAX6432:
14845 case X86::ATOMMIN6432:
14846 case X86::ATOMUMAX6432:
14847 case X86::ATOMUMIN6432:
14848 case X86::ATOMSWAP6432:
14849 return EmitAtomicLoadArith6432(MI, BB);
14851 case X86::VASTART_SAVE_XMM_REGS:
14852 return EmitVAStartSaveXMMRegsWithCustomInserter(MI, BB);
14854 case X86::VAARG_64:
14855 return EmitVAARG64WithCustomInserter(MI, BB);
14857 case X86::EH_SjLj_SetJmp32:
14858 case X86::EH_SjLj_SetJmp64:
14859 return emitEHSjLjSetJmp(MI, BB);
14861 case X86::EH_SjLj_LongJmp32:
14862 case X86::EH_SjLj_LongJmp64:
14863 return emitEHSjLjLongJmp(MI, BB);
14867 //===----------------------------------------------------------------------===//
14868 // X86 Optimization Hooks
14869 //===----------------------------------------------------------------------===//
14871 void X86TargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
14874 const SelectionDAG &DAG,
14875 unsigned Depth) const {
14876 unsigned BitWidth = KnownZero.getBitWidth();
14877 unsigned Opc = Op.getOpcode();
14878 assert((Opc >= ISD::BUILTIN_OP_END ||
14879 Opc == ISD::INTRINSIC_WO_CHAIN ||
14880 Opc == ISD::INTRINSIC_W_CHAIN ||
14881 Opc == ISD::INTRINSIC_VOID) &&
14882 "Should use MaskedValueIsZero if you don't know whether Op"
14883 " is a target node!");
14885 KnownZero = KnownOne = APInt(BitWidth, 0); // Don't know anything.
14899 // These nodes' second result is a boolean.
14900 if (Op.getResNo() == 0)
14903 case X86ISD::SETCC:
14904 KnownZero |= APInt::getHighBitsSet(BitWidth, BitWidth - 1);
14906 case ISD::INTRINSIC_WO_CHAIN: {
14907 unsigned IntId = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
14908 unsigned NumLoBits = 0;
14911 case Intrinsic::x86_sse_movmsk_ps:
14912 case Intrinsic::x86_avx_movmsk_ps_256:
14913 case Intrinsic::x86_sse2_movmsk_pd:
14914 case Intrinsic::x86_avx_movmsk_pd_256:
14915 case Intrinsic::x86_mmx_pmovmskb:
14916 case Intrinsic::x86_sse2_pmovmskb_128:
14917 case Intrinsic::x86_avx2_pmovmskb: {
14918 // High bits of movmskp{s|d}, pmovmskb are known zero.
14920 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
14921 case Intrinsic::x86_sse_movmsk_ps: NumLoBits = 4; break;
14922 case Intrinsic::x86_avx_movmsk_ps_256: NumLoBits = 8; break;
14923 case Intrinsic::x86_sse2_movmsk_pd: NumLoBits = 2; break;
14924 case Intrinsic::x86_avx_movmsk_pd_256: NumLoBits = 4; break;
14925 case Intrinsic::x86_mmx_pmovmskb: NumLoBits = 8; break;
14926 case Intrinsic::x86_sse2_pmovmskb_128: NumLoBits = 16; break;
14927 case Intrinsic::x86_avx2_pmovmskb: NumLoBits = 32; break;
14929 KnownZero = APInt::getHighBitsSet(BitWidth, BitWidth - NumLoBits);
14938 unsigned X86TargetLowering::ComputeNumSignBitsForTargetNode(SDValue Op,
14939 unsigned Depth) const {
14940 // SETCC_CARRY sets the dest to ~0 for true or 0 for false.
14941 if (Op.getOpcode() == X86ISD::SETCC_CARRY)
14942 return Op.getValueType().getScalarType().getSizeInBits();
14948 /// isGAPlusOffset - Returns true (and the GlobalValue and the offset) if the
14949 /// node is a GlobalAddress + offset.
14950 bool X86TargetLowering::isGAPlusOffset(SDNode *N,
14951 const GlobalValue* &GA,
14952 int64_t &Offset) const {
14953 if (N->getOpcode() == X86ISD::Wrapper) {
14954 if (isa<GlobalAddressSDNode>(N->getOperand(0))) {
14955 GA = cast<GlobalAddressSDNode>(N->getOperand(0))->getGlobal();
14956 Offset = cast<GlobalAddressSDNode>(N->getOperand(0))->getOffset();
14960 return TargetLowering::isGAPlusOffset(N, GA, Offset);
14963 /// isShuffleHigh128VectorInsertLow - Checks whether the shuffle node is the
14964 /// same as extracting the high 128-bit part of 256-bit vector and then
14965 /// inserting the result into the low part of a new 256-bit vector
14966 static bool isShuffleHigh128VectorInsertLow(ShuffleVectorSDNode *SVOp) {
14967 EVT VT = SVOp->getValueType(0);
14968 unsigned NumElems = VT.getVectorNumElements();
14970 // vector_shuffle <4, 5, 6, 7, u, u, u, u> or <2, 3, u, u>
14971 for (unsigned i = 0, j = NumElems/2; i != NumElems/2; ++i, ++j)
14972 if (!isUndefOrEqual(SVOp->getMaskElt(i), j) ||
14973 SVOp->getMaskElt(j) >= 0)
14979 /// isShuffleLow128VectorInsertHigh - Checks whether the shuffle node is the
14980 /// same as extracting the low 128-bit part of 256-bit vector and then
14981 /// inserting the result into the high part of a new 256-bit vector
14982 static bool isShuffleLow128VectorInsertHigh(ShuffleVectorSDNode *SVOp) {
14983 EVT VT = SVOp->getValueType(0);
14984 unsigned NumElems = VT.getVectorNumElements();
14986 // vector_shuffle <u, u, u, u, 0, 1, 2, 3> or <u, u, 0, 1>
14987 for (unsigned i = NumElems/2, j = 0; i != NumElems; ++i, ++j)
14988 if (!isUndefOrEqual(SVOp->getMaskElt(i), j) ||
14989 SVOp->getMaskElt(j) >= 0)
14995 /// PerformShuffleCombine256 - Performs shuffle combines for 256-bit vectors.
14996 static SDValue PerformShuffleCombine256(SDNode *N, SelectionDAG &DAG,
14997 TargetLowering::DAGCombinerInfo &DCI,
14998 const X86Subtarget* Subtarget) {
14999 DebugLoc dl = N->getDebugLoc();
15000 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
15001 SDValue V1 = SVOp->getOperand(0);
15002 SDValue V2 = SVOp->getOperand(1);
15003 EVT VT = SVOp->getValueType(0);
15004 unsigned NumElems = VT.getVectorNumElements();
15006 if (V1.getOpcode() == ISD::CONCAT_VECTORS &&
15007 V2.getOpcode() == ISD::CONCAT_VECTORS) {
15011 // V UNDEF BUILD_VECTOR UNDEF
15013 // CONCAT_VECTOR CONCAT_VECTOR
15016 // RESULT: V + zero extended
15018 if (V2.getOperand(0).getOpcode() != ISD::BUILD_VECTOR ||
15019 V2.getOperand(1).getOpcode() != ISD::UNDEF ||
15020 V1.getOperand(1).getOpcode() != ISD::UNDEF)
15023 if (!ISD::isBuildVectorAllZeros(V2.getOperand(0).getNode()))
15026 // To match the shuffle mask, the first half of the mask should
15027 // be exactly the first vector, and all the rest a splat with the
15028 // first element of the second one.
15029 for (unsigned i = 0; i != NumElems/2; ++i)
15030 if (!isUndefOrEqual(SVOp->getMaskElt(i), i) ||
15031 !isUndefOrEqual(SVOp->getMaskElt(i+NumElems/2), NumElems))
15034 // If V1 is coming from a vector load then just fold to a VZEXT_LOAD.
15035 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(V1.getOperand(0))) {
15036 if (Ld->hasNUsesOfValue(1, 0)) {
15037 SDVTList Tys = DAG.getVTList(MVT::v4i64, MVT::Other);
15038 SDValue Ops[] = { Ld->getChain(), Ld->getBasePtr() };
15040 DAG.getMemIntrinsicNode(X86ISD::VZEXT_LOAD, dl, Tys, Ops, 2,
15042 Ld->getPointerInfo(),
15043 Ld->getAlignment(),
15044 false/*isVolatile*/, true/*ReadMem*/,
15045 false/*WriteMem*/);
15047 // Make sure the newly-created LOAD is in the same position as Ld in
15048 // terms of dependency. We create a TokenFactor for Ld and ResNode,
15049 // and update uses of Ld's output chain to use the TokenFactor.
15050 if (Ld->hasAnyUseOfValue(1)) {
15051 SDValue NewChain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
15052 SDValue(Ld, 1), SDValue(ResNode.getNode(), 1));
15053 DAG.ReplaceAllUsesOfValueWith(SDValue(Ld, 1), NewChain);
15054 DAG.UpdateNodeOperands(NewChain.getNode(), SDValue(Ld, 1),
15055 SDValue(ResNode.getNode(), 1));
15058 return DAG.getNode(ISD::BITCAST, dl, VT, ResNode);
15062 // Emit a zeroed vector and insert the desired subvector on its
15064 SDValue Zeros = getZeroVector(VT, Subtarget, DAG, dl);
15065 SDValue InsV = Insert128BitVector(Zeros, V1.getOperand(0), 0, DAG, dl);
15066 return DCI.CombineTo(N, InsV);
15069 //===--------------------------------------------------------------------===//
15070 // Combine some shuffles into subvector extracts and inserts:
15073 // vector_shuffle <4, 5, 6, 7, u, u, u, u> or <2, 3, u, u>
15074 if (isShuffleHigh128VectorInsertLow(SVOp)) {
15075 SDValue V = Extract128BitVector(V1, NumElems/2, DAG, dl);
15076 SDValue InsV = Insert128BitVector(DAG.getUNDEF(VT), V, 0, DAG, dl);
15077 return DCI.CombineTo(N, InsV);
15080 // vector_shuffle <u, u, u, u, 0, 1, 2, 3> or <u, u, 0, 1>
15081 if (isShuffleLow128VectorInsertHigh(SVOp)) {
15082 SDValue V = Extract128BitVector(V1, 0, DAG, dl);
15083 SDValue InsV = Insert128BitVector(DAG.getUNDEF(VT), V, NumElems/2, DAG, dl);
15084 return DCI.CombineTo(N, InsV);
15090 /// PerformShuffleCombine - Performs several different shuffle combines.
15091 static SDValue PerformShuffleCombine(SDNode *N, SelectionDAG &DAG,
15092 TargetLowering::DAGCombinerInfo &DCI,
15093 const X86Subtarget *Subtarget) {
15094 DebugLoc dl = N->getDebugLoc();
15095 EVT VT = N->getValueType(0);
15097 // Don't create instructions with illegal types after legalize types has run.
15098 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
15099 if (!DCI.isBeforeLegalize() && !TLI.isTypeLegal(VT.getVectorElementType()))
15102 // Combine 256-bit vector shuffles. This is only profitable when in AVX mode
15103 if (Subtarget->hasFp256() && VT.is256BitVector() &&
15104 N->getOpcode() == ISD::VECTOR_SHUFFLE)
15105 return PerformShuffleCombine256(N, DAG, DCI, Subtarget);
15107 // Only handle 128 wide vector from here on.
15108 if (!VT.is128BitVector())
15111 // Combine a vector_shuffle that is equal to build_vector load1, load2, load3,
15112 // load4, <0, 1, 2, 3> into a 128-bit load if the load addresses are
15113 // consecutive, non-overlapping, and in the right order.
15114 SmallVector<SDValue, 16> Elts;
15115 for (unsigned i = 0, e = VT.getVectorNumElements(); i != e; ++i)
15116 Elts.push_back(getShuffleScalarElt(N, i, DAG, 0));
15118 return EltsFromConsecutiveLoads(VT, Elts, dl, DAG);
15121 /// PerformTruncateCombine - Converts truncate operation to
15122 /// a sequence of vector shuffle operations.
15123 /// It is possible when we truncate 256-bit vector to 128-bit vector
15124 static SDValue PerformTruncateCombine(SDNode *N, SelectionDAG &DAG,
15125 TargetLowering::DAGCombinerInfo &DCI,
15126 const X86Subtarget *Subtarget) {
15130 /// XFormVExtractWithShuffleIntoLoad - Check if a vector extract from a target
15131 /// specific shuffle of a load can be folded into a single element load.
15132 /// Similar handling for VECTOR_SHUFFLE is performed by DAGCombiner, but
15133 /// shuffles have been customed lowered so we need to handle those here.
15134 static SDValue XFormVExtractWithShuffleIntoLoad(SDNode *N, SelectionDAG &DAG,
15135 TargetLowering::DAGCombinerInfo &DCI) {
15136 if (DCI.isBeforeLegalizeOps())
15139 SDValue InVec = N->getOperand(0);
15140 SDValue EltNo = N->getOperand(1);
15142 if (!isa<ConstantSDNode>(EltNo))
15145 EVT VT = InVec.getValueType();
15147 bool HasShuffleIntoBitcast = false;
15148 if (InVec.getOpcode() == ISD::BITCAST) {
15149 // Don't duplicate a load with other uses.
15150 if (!InVec.hasOneUse())
15152 EVT BCVT = InVec.getOperand(0).getValueType();
15153 if (BCVT.getVectorNumElements() != VT.getVectorNumElements())
15155 InVec = InVec.getOperand(0);
15156 HasShuffleIntoBitcast = true;
15159 if (!isTargetShuffle(InVec.getOpcode()))
15162 // Don't duplicate a load with other uses.
15163 if (!InVec.hasOneUse())
15166 SmallVector<int, 16> ShuffleMask;
15168 if (!getTargetShuffleMask(InVec.getNode(), VT.getSimpleVT(), ShuffleMask,
15172 // Select the input vector, guarding against out of range extract vector.
15173 unsigned NumElems = VT.getVectorNumElements();
15174 int Elt = cast<ConstantSDNode>(EltNo)->getZExtValue();
15175 int Idx = (Elt > (int)NumElems) ? -1 : ShuffleMask[Elt];
15176 SDValue LdNode = (Idx < (int)NumElems) ? InVec.getOperand(0)
15177 : InVec.getOperand(1);
15179 // If inputs to shuffle are the same for both ops, then allow 2 uses
15180 unsigned AllowedUses = InVec.getOperand(0) == InVec.getOperand(1) ? 2 : 1;
15182 if (LdNode.getOpcode() == ISD::BITCAST) {
15183 // Don't duplicate a load with other uses.
15184 if (!LdNode.getNode()->hasNUsesOfValue(AllowedUses, 0))
15187 AllowedUses = 1; // only allow 1 load use if we have a bitcast
15188 LdNode = LdNode.getOperand(0);
15191 if (!ISD::isNormalLoad(LdNode.getNode()))
15194 LoadSDNode *LN0 = cast<LoadSDNode>(LdNode);
15196 if (!LN0 ||!LN0->hasNUsesOfValue(AllowedUses, 0) || LN0->isVolatile())
15199 if (HasShuffleIntoBitcast) {
15200 // If there's a bitcast before the shuffle, check if the load type and
15201 // alignment is valid.
15202 unsigned Align = LN0->getAlignment();
15203 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
15204 unsigned NewAlign = TLI.getDataLayout()->
15205 getABITypeAlignment(VT.getTypeForEVT(*DAG.getContext()));
15207 if (NewAlign > Align || !TLI.isOperationLegalOrCustom(ISD::LOAD, VT))
15211 // All checks match so transform back to vector_shuffle so that DAG combiner
15212 // can finish the job
15213 DebugLoc dl = N->getDebugLoc();
15215 // Create shuffle node taking into account the case that its a unary shuffle
15216 SDValue Shuffle = (UnaryShuffle) ? DAG.getUNDEF(VT) : InVec.getOperand(1);
15217 Shuffle = DAG.getVectorShuffle(InVec.getValueType(), dl,
15218 InVec.getOperand(0), Shuffle,
15220 Shuffle = DAG.getNode(ISD::BITCAST, dl, VT, Shuffle);
15221 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, N->getValueType(0), Shuffle,
15225 /// PerformEXTRACT_VECTOR_ELTCombine - Detect vector gather/scatter index
15226 /// generation and convert it from being a bunch of shuffles and extracts
15227 /// to a simple store and scalar loads to extract the elements.
15228 static SDValue PerformEXTRACT_VECTOR_ELTCombine(SDNode *N, SelectionDAG &DAG,
15229 TargetLowering::DAGCombinerInfo &DCI) {
15230 SDValue NewOp = XFormVExtractWithShuffleIntoLoad(N, DAG, DCI);
15231 if (NewOp.getNode())
15234 SDValue InputVector = N->getOperand(0);
15235 // Detect whether we are trying to convert from mmx to i32 and the bitcast
15236 // from mmx to v2i32 has a single usage.
15237 if (InputVector.getNode()->getOpcode() == llvm::ISD::BITCAST &&
15238 InputVector.getNode()->getOperand(0).getValueType() == MVT::x86mmx &&
15239 InputVector.hasOneUse() && N->getValueType(0) == MVT::i32)
15240 return DAG.getNode(X86ISD::MMX_MOVD2W, InputVector.getDebugLoc(),
15241 N->getValueType(0),
15242 InputVector.getNode()->getOperand(0));
15244 // Only operate on vectors of 4 elements, where the alternative shuffling
15245 // gets to be more expensive.
15246 if (InputVector.getValueType() != MVT::v4i32)
15249 // Check whether every use of InputVector is an EXTRACT_VECTOR_ELT with a
15250 // single use which is a sign-extend or zero-extend, and all elements are
15252 SmallVector<SDNode *, 4> Uses;
15253 unsigned ExtractedElements = 0;
15254 for (SDNode::use_iterator UI = InputVector.getNode()->use_begin(),
15255 UE = InputVector.getNode()->use_end(); UI != UE; ++UI) {
15256 if (UI.getUse().getResNo() != InputVector.getResNo())
15259 SDNode *Extract = *UI;
15260 if (Extract->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
15263 if (Extract->getValueType(0) != MVT::i32)
15265 if (!Extract->hasOneUse())
15267 if (Extract->use_begin()->getOpcode() != ISD::SIGN_EXTEND &&
15268 Extract->use_begin()->getOpcode() != ISD::ZERO_EXTEND)
15270 if (!isa<ConstantSDNode>(Extract->getOperand(1)))
15273 // Record which element was extracted.
15274 ExtractedElements |=
15275 1 << cast<ConstantSDNode>(Extract->getOperand(1))->getZExtValue();
15277 Uses.push_back(Extract);
15280 // If not all the elements were used, this may not be worthwhile.
15281 if (ExtractedElements != 15)
15284 // Ok, we've now decided to do the transformation.
15285 DebugLoc dl = InputVector.getDebugLoc();
15287 // Store the value to a temporary stack slot.
15288 SDValue StackPtr = DAG.CreateStackTemporary(InputVector.getValueType());
15289 SDValue Ch = DAG.getStore(DAG.getEntryNode(), dl, InputVector, StackPtr,
15290 MachinePointerInfo(), false, false, 0);
15292 // Replace each use (extract) with a load of the appropriate element.
15293 for (SmallVectorImpl<SDNode *>::iterator UI = Uses.begin(),
15294 UE = Uses.end(); UI != UE; ++UI) {
15295 SDNode *Extract = *UI;
15297 // cOMpute the element's address.
15298 SDValue Idx = Extract->getOperand(1);
15300 InputVector.getValueType().getVectorElementType().getSizeInBits()/8;
15301 uint64_t Offset = EltSize * cast<ConstantSDNode>(Idx)->getZExtValue();
15302 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
15303 SDValue OffsetVal = DAG.getConstant(Offset, TLI.getPointerTy());
15305 SDValue ScalarAddr = DAG.getNode(ISD::ADD, dl, TLI.getPointerTy(),
15306 StackPtr, OffsetVal);
15308 // Load the scalar.
15309 SDValue LoadScalar = DAG.getLoad(Extract->getValueType(0), dl, Ch,
15310 ScalarAddr, MachinePointerInfo(),
15311 false, false, false, 0);
15313 // Replace the exact with the load.
15314 DAG.ReplaceAllUsesOfValueWith(SDValue(Extract, 0), LoadScalar);
15317 // The replacement was made in place; don't return anything.
15321 /// \brief Matches a VSELECT onto min/max or return 0 if the node doesn't match.
15322 static unsigned matchIntegerMINMAX(SDValue Cond, EVT VT, SDValue LHS,
15323 SDValue RHS, SelectionDAG &DAG,
15324 const X86Subtarget *Subtarget) {
15325 if (!VT.isVector())
15328 switch (VT.getSimpleVT().SimpleTy) {
15333 if (!Subtarget->hasAVX2())
15338 if (!Subtarget->hasSSE2())
15342 // SSE2 has only a small subset of the operations.
15343 bool hasUnsigned = Subtarget->hasSSE41() ||
15344 (Subtarget->hasSSE2() && VT == MVT::v16i8);
15345 bool hasSigned = Subtarget->hasSSE41() ||
15346 (Subtarget->hasSSE2() && VT == MVT::v8i16);
15348 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
15350 // Check for x CC y ? x : y.
15351 if (DAG.isEqualTo(LHS, Cond.getOperand(0)) &&
15352 DAG.isEqualTo(RHS, Cond.getOperand(1))) {
15357 return hasUnsigned ? X86ISD::UMIN : 0;
15360 return hasUnsigned ? X86ISD::UMAX : 0;
15363 return hasSigned ? X86ISD::SMIN : 0;
15366 return hasSigned ? X86ISD::SMAX : 0;
15368 // Check for x CC y ? y : x -- a min/max with reversed arms.
15369 } else if (DAG.isEqualTo(LHS, Cond.getOperand(1)) &&
15370 DAG.isEqualTo(RHS, Cond.getOperand(0))) {
15375 return hasUnsigned ? X86ISD::UMAX : 0;
15378 return hasUnsigned ? X86ISD::UMIN : 0;
15381 return hasSigned ? X86ISD::SMAX : 0;
15384 return hasSigned ? X86ISD::SMIN : 0;
15391 /// PerformSELECTCombine - Do target-specific dag combines on SELECT and VSELECT
15393 static SDValue PerformSELECTCombine(SDNode *N, SelectionDAG &DAG,
15394 TargetLowering::DAGCombinerInfo &DCI,
15395 const X86Subtarget *Subtarget) {
15396 DebugLoc DL = N->getDebugLoc();
15397 SDValue Cond = N->getOperand(0);
15398 // Get the LHS/RHS of the select.
15399 SDValue LHS = N->getOperand(1);
15400 SDValue RHS = N->getOperand(2);
15401 EVT VT = LHS.getValueType();
15403 // If we have SSE[12] support, try to form min/max nodes. SSE min/max
15404 // instructions match the semantics of the common C idiom x<y?x:y but not
15405 // x<=y?x:y, because of how they handle negative zero (which can be
15406 // ignored in unsafe-math mode).
15407 if (Cond.getOpcode() == ISD::SETCC && VT.isFloatingPoint() &&
15408 VT != MVT::f80 && DAG.getTargetLoweringInfo().isTypeLegal(VT) &&
15409 (Subtarget->hasSSE2() ||
15410 (Subtarget->hasSSE1() && VT.getScalarType() == MVT::f32))) {
15411 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
15413 unsigned Opcode = 0;
15414 // Check for x CC y ? x : y.
15415 if (DAG.isEqualTo(LHS, Cond.getOperand(0)) &&
15416 DAG.isEqualTo(RHS, Cond.getOperand(1))) {
15420 // Converting this to a min would handle NaNs incorrectly, and swapping
15421 // the operands would cause it to handle comparisons between positive
15422 // and negative zero incorrectly.
15423 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) {
15424 if (!DAG.getTarget().Options.UnsafeFPMath &&
15425 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
15427 std::swap(LHS, RHS);
15429 Opcode = X86ISD::FMIN;
15432 // Converting this to a min would handle comparisons between positive
15433 // and negative zero incorrectly.
15434 if (!DAG.getTarget().Options.UnsafeFPMath &&
15435 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS))
15437 Opcode = X86ISD::FMIN;
15440 // Converting this to a min would handle both negative zeros and NaNs
15441 // incorrectly, but we can swap the operands to fix both.
15442 std::swap(LHS, RHS);
15446 Opcode = X86ISD::FMIN;
15450 // Converting this to a max would handle comparisons between positive
15451 // and negative zero incorrectly.
15452 if (!DAG.getTarget().Options.UnsafeFPMath &&
15453 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS))
15455 Opcode = X86ISD::FMAX;
15458 // Converting this to a max would handle NaNs incorrectly, and swapping
15459 // the operands would cause it to handle comparisons between positive
15460 // and negative zero incorrectly.
15461 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) {
15462 if (!DAG.getTarget().Options.UnsafeFPMath &&
15463 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
15465 std::swap(LHS, RHS);
15467 Opcode = X86ISD::FMAX;
15470 // Converting this to a max would handle both negative zeros and NaNs
15471 // incorrectly, but we can swap the operands to fix both.
15472 std::swap(LHS, RHS);
15476 Opcode = X86ISD::FMAX;
15479 // Check for x CC y ? y : x -- a min/max with reversed arms.
15480 } else if (DAG.isEqualTo(LHS, Cond.getOperand(1)) &&
15481 DAG.isEqualTo(RHS, Cond.getOperand(0))) {
15485 // Converting this to a min would handle comparisons between positive
15486 // and negative zero incorrectly, and swapping the operands would
15487 // cause it to handle NaNs incorrectly.
15488 if (!DAG.getTarget().Options.UnsafeFPMath &&
15489 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS))) {
15490 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
15492 std::swap(LHS, RHS);
15494 Opcode = X86ISD::FMIN;
15497 // Converting this to a min would handle NaNs incorrectly.
15498 if (!DAG.getTarget().Options.UnsafeFPMath &&
15499 (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)))
15501 Opcode = X86ISD::FMIN;
15504 // Converting this to a min would handle both negative zeros and NaNs
15505 // incorrectly, but we can swap the operands to fix both.
15506 std::swap(LHS, RHS);
15510 Opcode = X86ISD::FMIN;
15514 // Converting this to a max would handle NaNs incorrectly.
15515 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
15517 Opcode = X86ISD::FMAX;
15520 // Converting this to a max would handle comparisons between positive
15521 // and negative zero incorrectly, and swapping the operands would
15522 // cause it to handle NaNs incorrectly.
15523 if (!DAG.getTarget().Options.UnsafeFPMath &&
15524 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS)) {
15525 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
15527 std::swap(LHS, RHS);
15529 Opcode = X86ISD::FMAX;
15532 // Converting this to a max would handle both negative zeros and NaNs
15533 // incorrectly, but we can swap the operands to fix both.
15534 std::swap(LHS, RHS);
15538 Opcode = X86ISD::FMAX;
15544 return DAG.getNode(Opcode, DL, N->getValueType(0), LHS, RHS);
15547 // If this is a select between two integer constants, try to do some
15549 if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(LHS)) {
15550 if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(RHS))
15551 // Don't do this for crazy integer types.
15552 if (DAG.getTargetLoweringInfo().isTypeLegal(LHS.getValueType())) {
15553 // If this is efficiently invertible, canonicalize the LHSC/RHSC values
15554 // so that TrueC (the true value) is larger than FalseC.
15555 bool NeedsCondInvert = false;
15557 if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue()) &&
15558 // Efficiently invertible.
15559 (Cond.getOpcode() == ISD::SETCC || // setcc -> invertible.
15560 (Cond.getOpcode() == ISD::XOR && // xor(X, C) -> invertible.
15561 isa<ConstantSDNode>(Cond.getOperand(1))))) {
15562 NeedsCondInvert = true;
15563 std::swap(TrueC, FalseC);
15566 // Optimize C ? 8 : 0 -> zext(C) << 3. Likewise for any pow2/0.
15567 if (FalseC->getAPIntValue() == 0 &&
15568 TrueC->getAPIntValue().isPowerOf2()) {
15569 if (NeedsCondInvert) // Invert the condition if needed.
15570 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
15571 DAG.getConstant(1, Cond.getValueType()));
15573 // Zero extend the condition if needed.
15574 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, LHS.getValueType(), Cond);
15576 unsigned ShAmt = TrueC->getAPIntValue().logBase2();
15577 return DAG.getNode(ISD::SHL, DL, LHS.getValueType(), Cond,
15578 DAG.getConstant(ShAmt, MVT::i8));
15581 // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst.
15582 if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) {
15583 if (NeedsCondInvert) // Invert the condition if needed.
15584 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
15585 DAG.getConstant(1, Cond.getValueType()));
15587 // Zero extend the condition if needed.
15588 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL,
15589 FalseC->getValueType(0), Cond);
15590 return DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
15591 SDValue(FalseC, 0));
15594 // Optimize cases that will turn into an LEA instruction. This requires
15595 // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9).
15596 if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) {
15597 uint64_t Diff = TrueC->getZExtValue()-FalseC->getZExtValue();
15598 if (N->getValueType(0) == MVT::i32) Diff = (unsigned)Diff;
15600 bool isFastMultiplier = false;
15602 switch ((unsigned char)Diff) {
15604 case 1: // result = add base, cond
15605 case 2: // result = lea base( , cond*2)
15606 case 3: // result = lea base(cond, cond*2)
15607 case 4: // result = lea base( , cond*4)
15608 case 5: // result = lea base(cond, cond*4)
15609 case 8: // result = lea base( , cond*8)
15610 case 9: // result = lea base(cond, cond*8)
15611 isFastMultiplier = true;
15616 if (isFastMultiplier) {
15617 APInt Diff = TrueC->getAPIntValue()-FalseC->getAPIntValue();
15618 if (NeedsCondInvert) // Invert the condition if needed.
15619 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
15620 DAG.getConstant(1, Cond.getValueType()));
15622 // Zero extend the condition if needed.
15623 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0),
15625 // Scale the condition by the difference.
15627 Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond,
15628 DAG.getConstant(Diff, Cond.getValueType()));
15630 // Add the base if non-zero.
15631 if (FalseC->getAPIntValue() != 0)
15632 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
15633 SDValue(FalseC, 0));
15640 // Canonicalize max and min:
15641 // (x > y) ? x : y -> (x >= y) ? x : y
15642 // (x < y) ? x : y -> (x <= y) ? x : y
15643 // This allows use of COND_S / COND_NS (see TranslateX86CC) which eliminates
15644 // the need for an extra compare
15645 // against zero. e.g.
15646 // (x - y) > 0 : (x - y) ? 0 -> (x - y) >= 0 : (x - y) ? 0
15648 // testl %edi, %edi
15650 // cmovgl %edi, %eax
15654 // cmovsl %eax, %edi
15655 if (N->getOpcode() == ISD::SELECT && Cond.getOpcode() == ISD::SETCC &&
15656 DAG.isEqualTo(LHS, Cond.getOperand(0)) &&
15657 DAG.isEqualTo(RHS, Cond.getOperand(1))) {
15658 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
15663 ISD::CondCode NewCC = (CC == ISD::SETLT) ? ISD::SETLE : ISD::SETGE;
15664 Cond = DAG.getSetCC(Cond.getDebugLoc(), Cond.getValueType(),
15665 Cond.getOperand(0), Cond.getOperand(1), NewCC);
15666 return DAG.getNode(ISD::SELECT, DL, VT, Cond, LHS, RHS);
15671 // Match VSELECTs into subs with unsigned saturation.
15672 if (!DCI.isBeforeLegalize() &&
15673 N->getOpcode() == ISD::VSELECT && Cond.getOpcode() == ISD::SETCC &&
15674 // psubus is available in SSE2 and AVX2 for i8 and i16 vectors.
15675 ((Subtarget->hasSSE2() && (VT == MVT::v16i8 || VT == MVT::v8i16)) ||
15676 (Subtarget->hasAVX2() && (VT == MVT::v32i8 || VT == MVT::v16i16)))) {
15677 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
15679 // Check if one of the arms of the VSELECT is a zero vector. If it's on the
15680 // left side invert the predicate to simplify logic below.
15682 if (ISD::isBuildVectorAllZeros(LHS.getNode())) {
15684 CC = ISD::getSetCCInverse(CC, true);
15685 } else if (ISD::isBuildVectorAllZeros(RHS.getNode())) {
15689 if (Other.getNode() && Other->getNumOperands() == 2 &&
15690 DAG.isEqualTo(Other->getOperand(0), Cond.getOperand(0))) {
15691 SDValue OpLHS = Other->getOperand(0), OpRHS = Other->getOperand(1);
15692 SDValue CondRHS = Cond->getOperand(1);
15694 // Look for a general sub with unsigned saturation first.
15695 // x >= y ? x-y : 0 --> subus x, y
15696 // x > y ? x-y : 0 --> subus x, y
15697 if ((CC == ISD::SETUGE || CC == ISD::SETUGT) &&
15698 Other->getOpcode() == ISD::SUB && DAG.isEqualTo(OpRHS, CondRHS))
15699 return DAG.getNode(X86ISD::SUBUS, DL, VT, OpLHS, OpRHS);
15701 // If the RHS is a constant we have to reverse the const canonicalization.
15702 // x > C-1 ? x+-C : 0 --> subus x, C
15703 if (CC == ISD::SETUGT && Other->getOpcode() == ISD::ADD &&
15704 isSplatVector(CondRHS.getNode()) && isSplatVector(OpRHS.getNode())) {
15705 APInt A = cast<ConstantSDNode>(OpRHS.getOperand(0))->getAPIntValue();
15706 if (CondRHS.getConstantOperandVal(0) == -A-1)
15707 return DAG.getNode(X86ISD::SUBUS, DL, VT, OpLHS,
15708 DAG.getConstant(-A, VT));
15711 // Another special case: If C was a sign bit, the sub has been
15712 // canonicalized into a xor.
15713 // FIXME: Would it be better to use ComputeMaskedBits to determine whether
15714 // it's safe to decanonicalize the xor?
15715 // x s< 0 ? x^C : 0 --> subus x, C
15716 if (CC == ISD::SETLT && Other->getOpcode() == ISD::XOR &&
15717 ISD::isBuildVectorAllZeros(CondRHS.getNode()) &&
15718 isSplatVector(OpRHS.getNode())) {
15719 APInt A = cast<ConstantSDNode>(OpRHS.getOperand(0))->getAPIntValue();
15721 return DAG.getNode(X86ISD::SUBUS, DL, VT, OpLHS, OpRHS);
15726 // Try to match a min/max vector operation.
15727 if (!DCI.isBeforeLegalize() &&
15728 N->getOpcode() == ISD::VSELECT && Cond.getOpcode() == ISD::SETCC)
15729 if (unsigned Op = matchIntegerMINMAX(Cond, VT, LHS, RHS, DAG, Subtarget))
15730 return DAG.getNode(Op, DL, N->getValueType(0), LHS, RHS);
15732 // If we know that this node is legal then we know that it is going to be
15733 // matched by one of the SSE/AVX BLEND instructions. These instructions only
15734 // depend on the highest bit in each word. Try to use SimplifyDemandedBits
15735 // to simplify previous instructions.
15736 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
15737 if (N->getOpcode() == ISD::VSELECT && DCI.isBeforeLegalizeOps() &&
15738 !DCI.isBeforeLegalize() && TLI.isOperationLegal(ISD::VSELECT, VT)) {
15739 unsigned BitWidth = Cond.getValueType().getScalarType().getSizeInBits();
15741 // Don't optimize vector selects that map to mask-registers.
15745 assert(BitWidth >= 8 && BitWidth <= 64 && "Invalid mask size");
15746 APInt DemandedMask = APInt::getHighBitsSet(BitWidth, 1);
15748 APInt KnownZero, KnownOne;
15749 TargetLowering::TargetLoweringOpt TLO(DAG, DCI.isBeforeLegalize(),
15750 DCI.isBeforeLegalizeOps());
15751 if (TLO.ShrinkDemandedConstant(Cond, DemandedMask) ||
15752 TLI.SimplifyDemandedBits(Cond, DemandedMask, KnownZero, KnownOne, TLO))
15753 DCI.CommitTargetLoweringOpt(TLO);
15759 // Check whether a boolean test is testing a boolean value generated by
15760 // X86ISD::SETCC. If so, return the operand of that SETCC and proper condition
15763 // Simplify the following patterns:
15764 // (Op (CMP (SETCC Cond EFLAGS) 1) EQ) or
15765 // (Op (CMP (SETCC Cond EFLAGS) 0) NEQ)
15766 // to (Op EFLAGS Cond)
15768 // (Op (CMP (SETCC Cond EFLAGS) 0) EQ) or
15769 // (Op (CMP (SETCC Cond EFLAGS) 1) NEQ)
15770 // to (Op EFLAGS !Cond)
15772 // where Op could be BRCOND or CMOV.
15774 static SDValue checkBoolTestSetCCCombine(SDValue Cmp, X86::CondCode &CC) {
15775 // Quit if not CMP and SUB with its value result used.
15776 if (Cmp.getOpcode() != X86ISD::CMP &&
15777 (Cmp.getOpcode() != X86ISD::SUB || Cmp.getNode()->hasAnyUseOfValue(0)))
15780 // Quit if not used as a boolean value.
15781 if (CC != X86::COND_E && CC != X86::COND_NE)
15784 // Check CMP operands. One of them should be 0 or 1 and the other should be
15785 // an SetCC or extended from it.
15786 SDValue Op1 = Cmp.getOperand(0);
15787 SDValue Op2 = Cmp.getOperand(1);
15790 const ConstantSDNode* C = 0;
15791 bool needOppositeCond = (CC == X86::COND_E);
15793 if ((C = dyn_cast<ConstantSDNode>(Op1)))
15795 else if ((C = dyn_cast<ConstantSDNode>(Op2)))
15797 else // Quit if all operands are not constants.
15800 if (C->getZExtValue() == 1)
15801 needOppositeCond = !needOppositeCond;
15802 else if (C->getZExtValue() != 0)
15803 // Quit if the constant is neither 0 or 1.
15806 // Skip 'zext' node.
15807 if (SetCC.getOpcode() == ISD::ZERO_EXTEND)
15808 SetCC = SetCC.getOperand(0);
15810 switch (SetCC.getOpcode()) {
15811 case X86ISD::SETCC:
15812 // Set the condition code or opposite one if necessary.
15813 CC = X86::CondCode(SetCC.getConstantOperandVal(0));
15814 if (needOppositeCond)
15815 CC = X86::GetOppositeBranchCondition(CC);
15816 return SetCC.getOperand(1);
15817 case X86ISD::CMOV: {
15818 // Check whether false/true value has canonical one, i.e. 0 or 1.
15819 ConstantSDNode *FVal = dyn_cast<ConstantSDNode>(SetCC.getOperand(0));
15820 ConstantSDNode *TVal = dyn_cast<ConstantSDNode>(SetCC.getOperand(1));
15821 // Quit if true value is not a constant.
15824 // Quit if false value is not a constant.
15826 // A special case for rdrand, where 0 is set if false cond is found.
15827 SDValue Op = SetCC.getOperand(0);
15828 if (Op.getOpcode() != X86ISD::RDRAND)
15831 // Quit if false value is not the constant 0 or 1.
15832 bool FValIsFalse = true;
15833 if (FVal && FVal->getZExtValue() != 0) {
15834 if (FVal->getZExtValue() != 1)
15836 // If FVal is 1, opposite cond is needed.
15837 needOppositeCond = !needOppositeCond;
15838 FValIsFalse = false;
15840 // Quit if TVal is not the constant opposite of FVal.
15841 if (FValIsFalse && TVal->getZExtValue() != 1)
15843 if (!FValIsFalse && TVal->getZExtValue() != 0)
15845 CC = X86::CondCode(SetCC.getConstantOperandVal(2));
15846 if (needOppositeCond)
15847 CC = X86::GetOppositeBranchCondition(CC);
15848 return SetCC.getOperand(3);
15855 /// Optimize X86ISD::CMOV [LHS, RHS, CONDCODE (e.g. X86::COND_NE), CONDVAL]
15856 static SDValue PerformCMOVCombine(SDNode *N, SelectionDAG &DAG,
15857 TargetLowering::DAGCombinerInfo &DCI,
15858 const X86Subtarget *Subtarget) {
15859 DebugLoc DL = N->getDebugLoc();
15861 // If the flag operand isn't dead, don't touch this CMOV.
15862 if (N->getNumValues() == 2 && !SDValue(N, 1).use_empty())
15865 SDValue FalseOp = N->getOperand(0);
15866 SDValue TrueOp = N->getOperand(1);
15867 X86::CondCode CC = (X86::CondCode)N->getConstantOperandVal(2);
15868 SDValue Cond = N->getOperand(3);
15870 if (CC == X86::COND_E || CC == X86::COND_NE) {
15871 switch (Cond.getOpcode()) {
15875 // If operand of BSR / BSF are proven never zero, then ZF cannot be set.
15876 if (DAG.isKnownNeverZero(Cond.getOperand(0)))
15877 return (CC == X86::COND_E) ? FalseOp : TrueOp;
15883 Flags = checkBoolTestSetCCCombine(Cond, CC);
15884 if (Flags.getNode() &&
15885 // Extra check as FCMOV only supports a subset of X86 cond.
15886 (FalseOp.getValueType() != MVT::f80 || hasFPCMov(CC))) {
15887 SDValue Ops[] = { FalseOp, TrueOp,
15888 DAG.getConstant(CC, MVT::i8), Flags };
15889 return DAG.getNode(X86ISD::CMOV, DL, N->getVTList(),
15890 Ops, array_lengthof(Ops));
15893 // If this is a select between two integer constants, try to do some
15894 // optimizations. Note that the operands are ordered the opposite of SELECT
15896 if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(TrueOp)) {
15897 if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(FalseOp)) {
15898 // Canonicalize the TrueC/FalseC values so that TrueC (the true value) is
15899 // larger than FalseC (the false value).
15900 if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue())) {
15901 CC = X86::GetOppositeBranchCondition(CC);
15902 std::swap(TrueC, FalseC);
15903 std::swap(TrueOp, FalseOp);
15906 // Optimize C ? 8 : 0 -> zext(setcc(C)) << 3. Likewise for any pow2/0.
15907 // This is efficient for any integer data type (including i8/i16) and
15909 if (FalseC->getAPIntValue() == 0 && TrueC->getAPIntValue().isPowerOf2()) {
15910 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
15911 DAG.getConstant(CC, MVT::i8), Cond);
15913 // Zero extend the condition if needed.
15914 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, TrueC->getValueType(0), Cond);
15916 unsigned ShAmt = TrueC->getAPIntValue().logBase2();
15917 Cond = DAG.getNode(ISD::SHL, DL, Cond.getValueType(), Cond,
15918 DAG.getConstant(ShAmt, MVT::i8));
15919 if (N->getNumValues() == 2) // Dead flag value?
15920 return DCI.CombineTo(N, Cond, SDValue());
15924 // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst. This is efficient
15925 // for any integer data type, including i8/i16.
15926 if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) {
15927 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
15928 DAG.getConstant(CC, MVT::i8), Cond);
15930 // Zero extend the condition if needed.
15931 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL,
15932 FalseC->getValueType(0), Cond);
15933 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
15934 SDValue(FalseC, 0));
15936 if (N->getNumValues() == 2) // Dead flag value?
15937 return DCI.CombineTo(N, Cond, SDValue());
15941 // Optimize cases that will turn into an LEA instruction. This requires
15942 // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9).
15943 if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) {
15944 uint64_t Diff = TrueC->getZExtValue()-FalseC->getZExtValue();
15945 if (N->getValueType(0) == MVT::i32) Diff = (unsigned)Diff;
15947 bool isFastMultiplier = false;
15949 switch ((unsigned char)Diff) {
15951 case 1: // result = add base, cond
15952 case 2: // result = lea base( , cond*2)
15953 case 3: // result = lea base(cond, cond*2)
15954 case 4: // result = lea base( , cond*4)
15955 case 5: // result = lea base(cond, cond*4)
15956 case 8: // result = lea base( , cond*8)
15957 case 9: // result = lea base(cond, cond*8)
15958 isFastMultiplier = true;
15963 if (isFastMultiplier) {
15964 APInt Diff = TrueC->getAPIntValue()-FalseC->getAPIntValue();
15965 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
15966 DAG.getConstant(CC, MVT::i8), Cond);
15967 // Zero extend the condition if needed.
15968 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0),
15970 // Scale the condition by the difference.
15972 Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond,
15973 DAG.getConstant(Diff, Cond.getValueType()));
15975 // Add the base if non-zero.
15976 if (FalseC->getAPIntValue() != 0)
15977 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
15978 SDValue(FalseC, 0));
15979 if (N->getNumValues() == 2) // Dead flag value?
15980 return DCI.CombineTo(N, Cond, SDValue());
15987 // Handle these cases:
15988 // (select (x != c), e, c) -> select (x != c), e, x),
15989 // (select (x == c), c, e) -> select (x == c), x, e)
15990 // where the c is an integer constant, and the "select" is the combination
15991 // of CMOV and CMP.
15993 // The rationale for this change is that the conditional-move from a constant
15994 // needs two instructions, however, conditional-move from a register needs
15995 // only one instruction.
15997 // CAVEAT: By replacing a constant with a symbolic value, it may obscure
15998 // some instruction-combining opportunities. This opt needs to be
15999 // postponed as late as possible.
16001 if (!DCI.isBeforeLegalize() && !DCI.isBeforeLegalizeOps()) {
16002 // the DCI.xxxx conditions are provided to postpone the optimization as
16003 // late as possible.
16005 ConstantSDNode *CmpAgainst = 0;
16006 if ((Cond.getOpcode() == X86ISD::CMP || Cond.getOpcode() == X86ISD::SUB) &&
16007 (CmpAgainst = dyn_cast<ConstantSDNode>(Cond.getOperand(1))) &&
16008 !isa<ConstantSDNode>(Cond.getOperand(0))) {
16010 if (CC == X86::COND_NE &&
16011 CmpAgainst == dyn_cast<ConstantSDNode>(FalseOp)) {
16012 CC = X86::GetOppositeBranchCondition(CC);
16013 std::swap(TrueOp, FalseOp);
16016 if (CC == X86::COND_E &&
16017 CmpAgainst == dyn_cast<ConstantSDNode>(TrueOp)) {
16018 SDValue Ops[] = { FalseOp, Cond.getOperand(0),
16019 DAG.getConstant(CC, MVT::i8), Cond };
16020 return DAG.getNode(X86ISD::CMOV, DL, N->getVTList (), Ops,
16021 array_lengthof(Ops));
16029 /// PerformMulCombine - Optimize a single multiply with constant into two
16030 /// in order to implement it with two cheaper instructions, e.g.
16031 /// LEA + SHL, LEA + LEA.
16032 static SDValue PerformMulCombine(SDNode *N, SelectionDAG &DAG,
16033 TargetLowering::DAGCombinerInfo &DCI) {
16034 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
16037 EVT VT = N->getValueType(0);
16038 if (VT != MVT::i64)
16041 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1));
16044 uint64_t MulAmt = C->getZExtValue();
16045 if (isPowerOf2_64(MulAmt) || MulAmt == 3 || MulAmt == 5 || MulAmt == 9)
16048 uint64_t MulAmt1 = 0;
16049 uint64_t MulAmt2 = 0;
16050 if ((MulAmt % 9) == 0) {
16052 MulAmt2 = MulAmt / 9;
16053 } else if ((MulAmt % 5) == 0) {
16055 MulAmt2 = MulAmt / 5;
16056 } else if ((MulAmt % 3) == 0) {
16058 MulAmt2 = MulAmt / 3;
16061 (isPowerOf2_64(MulAmt2) || MulAmt2 == 3 || MulAmt2 == 5 || MulAmt2 == 9)){
16062 DebugLoc DL = N->getDebugLoc();
16064 if (isPowerOf2_64(MulAmt2) &&
16065 !(N->hasOneUse() && N->use_begin()->getOpcode() == ISD::ADD))
16066 // If second multiplifer is pow2, issue it first. We want the multiply by
16067 // 3, 5, or 9 to be folded into the addressing mode unless the lone use
16069 std::swap(MulAmt1, MulAmt2);
16072 if (isPowerOf2_64(MulAmt1))
16073 NewMul = DAG.getNode(ISD::SHL, DL, VT, N->getOperand(0),
16074 DAG.getConstant(Log2_64(MulAmt1), MVT::i8));
16076 NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, N->getOperand(0),
16077 DAG.getConstant(MulAmt1, VT));
16079 if (isPowerOf2_64(MulAmt2))
16080 NewMul = DAG.getNode(ISD::SHL, DL, VT, NewMul,
16081 DAG.getConstant(Log2_64(MulAmt2), MVT::i8));
16083 NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, NewMul,
16084 DAG.getConstant(MulAmt2, VT));
16086 // Do not add new nodes to DAG combiner worklist.
16087 DCI.CombineTo(N, NewMul, false);
16092 static SDValue PerformSHLCombine(SDNode *N, SelectionDAG &DAG) {
16093 SDValue N0 = N->getOperand(0);
16094 SDValue N1 = N->getOperand(1);
16095 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
16096 EVT VT = N0.getValueType();
16098 // fold (shl (and (setcc_c), c1), c2) -> (and setcc_c, (c1 << c2))
16099 // since the result of setcc_c is all zero's or all ones.
16100 if (VT.isInteger() && !VT.isVector() &&
16101 N1C && N0.getOpcode() == ISD::AND &&
16102 N0.getOperand(1).getOpcode() == ISD::Constant) {
16103 SDValue N00 = N0.getOperand(0);
16104 if (N00.getOpcode() == X86ISD::SETCC_CARRY ||
16105 ((N00.getOpcode() == ISD::ANY_EXTEND ||
16106 N00.getOpcode() == ISD::ZERO_EXTEND) &&
16107 N00.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY)) {
16108 APInt Mask = cast<ConstantSDNode>(N0.getOperand(1))->getAPIntValue();
16109 APInt ShAmt = N1C->getAPIntValue();
16110 Mask = Mask.shl(ShAmt);
16112 return DAG.getNode(ISD::AND, N->getDebugLoc(), VT,
16113 N00, DAG.getConstant(Mask, VT));
16117 // Hardware support for vector shifts is sparse which makes us scalarize the
16118 // vector operations in many cases. Also, on sandybridge ADD is faster than
16120 // (shl V, 1) -> add V,V
16121 if (isSplatVector(N1.getNode())) {
16122 assert(N0.getValueType().isVector() && "Invalid vector shift type");
16123 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1->getOperand(0));
16124 // We shift all of the values by one. In many cases we do not have
16125 // hardware support for this operation. This is better expressed as an ADD
16127 if (N1C && (1 == N1C->getZExtValue())) {
16128 return DAG.getNode(ISD::ADD, N->getDebugLoc(), VT, N0, N0);
16135 /// PerformShiftCombine - Transforms vector shift nodes to use vector shifts
16137 static SDValue PerformShiftCombine(SDNode* N, SelectionDAG &DAG,
16138 TargetLowering::DAGCombinerInfo &DCI,
16139 const X86Subtarget *Subtarget) {
16140 if (N->getOpcode() == ISD::SHL) {
16141 SDValue V = PerformSHLCombine(N, DAG);
16142 if (V.getNode()) return V;
16148 // CMPEQCombine - Recognize the distinctive (AND (setcc ...) (setcc ..))
16149 // where both setccs reference the same FP CMP, and rewrite for CMPEQSS
16150 // and friends. Likewise for OR -> CMPNEQSS.
16151 static SDValue CMPEQCombine(SDNode *N, SelectionDAG &DAG,
16152 TargetLowering::DAGCombinerInfo &DCI,
16153 const X86Subtarget *Subtarget) {
16156 // SSE1 supports CMP{eq|ne}SS, and SSE2 added CMP{eq|ne}SD, but
16157 // we're requiring SSE2 for both.
16158 if (Subtarget->hasSSE2() && isAndOrOfSetCCs(SDValue(N, 0U), opcode)) {
16159 SDValue N0 = N->getOperand(0);
16160 SDValue N1 = N->getOperand(1);
16161 SDValue CMP0 = N0->getOperand(1);
16162 SDValue CMP1 = N1->getOperand(1);
16163 DebugLoc DL = N->getDebugLoc();
16165 // The SETCCs should both refer to the same CMP.
16166 if (CMP0.getOpcode() != X86ISD::CMP || CMP0 != CMP1)
16169 SDValue CMP00 = CMP0->getOperand(0);
16170 SDValue CMP01 = CMP0->getOperand(1);
16171 EVT VT = CMP00.getValueType();
16173 if (VT == MVT::f32 || VT == MVT::f64) {
16174 bool ExpectingFlags = false;
16175 // Check for any users that want flags:
16176 for (SDNode::use_iterator UI = N->use_begin(), UE = N->use_end();
16177 !ExpectingFlags && UI != UE; ++UI)
16178 switch (UI->getOpcode()) {
16183 ExpectingFlags = true;
16185 case ISD::CopyToReg:
16186 case ISD::SIGN_EXTEND:
16187 case ISD::ZERO_EXTEND:
16188 case ISD::ANY_EXTEND:
16192 if (!ExpectingFlags) {
16193 enum X86::CondCode cc0 = (enum X86::CondCode)N0.getConstantOperandVal(0);
16194 enum X86::CondCode cc1 = (enum X86::CondCode)N1.getConstantOperandVal(0);
16196 if (cc1 == X86::COND_E || cc1 == X86::COND_NE) {
16197 X86::CondCode tmp = cc0;
16202 if ((cc0 == X86::COND_E && cc1 == X86::COND_NP) ||
16203 (cc0 == X86::COND_NE && cc1 == X86::COND_P)) {
16204 bool is64BitFP = (CMP00.getValueType() == MVT::f64);
16205 X86ISD::NodeType NTOperator = is64BitFP ?
16206 X86ISD::FSETCCsd : X86ISD::FSETCCss;
16207 // FIXME: need symbolic constants for these magic numbers.
16208 // See X86ATTInstPrinter.cpp:printSSECC().
16209 unsigned x86cc = (cc0 == X86::COND_E) ? 0 : 4;
16210 SDValue OnesOrZeroesF = DAG.getNode(NTOperator, DL, MVT::f32, CMP00, CMP01,
16211 DAG.getConstant(x86cc, MVT::i8));
16212 SDValue OnesOrZeroesI = DAG.getNode(ISD::BITCAST, DL, MVT::i32,
16214 SDValue ANDed = DAG.getNode(ISD::AND, DL, MVT::i32, OnesOrZeroesI,
16215 DAG.getConstant(1, MVT::i32));
16216 SDValue OneBitOfTruth = DAG.getNode(ISD::TRUNCATE, DL, MVT::i8, ANDed);
16217 return OneBitOfTruth;
16225 /// CanFoldXORWithAllOnes - Test whether the XOR operand is a AllOnes vector
16226 /// so it can be folded inside ANDNP.
16227 static bool CanFoldXORWithAllOnes(const SDNode *N) {
16228 EVT VT = N->getValueType(0);
16230 // Match direct AllOnes for 128 and 256-bit vectors
16231 if (ISD::isBuildVectorAllOnes(N))
16234 // Look through a bit convert.
16235 if (N->getOpcode() == ISD::BITCAST)
16236 N = N->getOperand(0).getNode();
16238 // Sometimes the operand may come from a insert_subvector building a 256-bit
16240 if (VT.is256BitVector() &&
16241 N->getOpcode() == ISD::INSERT_SUBVECTOR) {
16242 SDValue V1 = N->getOperand(0);
16243 SDValue V2 = N->getOperand(1);
16245 if (V1.getOpcode() == ISD::INSERT_SUBVECTOR &&
16246 V1.getOperand(0).getOpcode() == ISD::UNDEF &&
16247 ISD::isBuildVectorAllOnes(V1.getOperand(1).getNode()) &&
16248 ISD::isBuildVectorAllOnes(V2.getNode()))
16255 // On AVX/AVX2 the type v8i1 is legalized to v8i16, which is an XMM sized
16256 // register. In most cases we actually compare or select YMM-sized registers
16257 // and mixing the two types creates horrible code. This method optimizes
16258 // some of the transition sequences.
16259 static SDValue WidenMaskArithmetic(SDNode *N, SelectionDAG &DAG,
16260 TargetLowering::DAGCombinerInfo &DCI,
16261 const X86Subtarget *Subtarget) {
16262 EVT VT = N->getValueType(0);
16263 if (!VT.is256BitVector())
16266 assert((N->getOpcode() == ISD::ANY_EXTEND ||
16267 N->getOpcode() == ISD::ZERO_EXTEND ||
16268 N->getOpcode() == ISD::SIGN_EXTEND) && "Invalid Node");
16270 SDValue Narrow = N->getOperand(0);
16271 EVT NarrowVT = Narrow->getValueType(0);
16272 if (!NarrowVT.is128BitVector())
16275 if (Narrow->getOpcode() != ISD::XOR &&
16276 Narrow->getOpcode() != ISD::AND &&
16277 Narrow->getOpcode() != ISD::OR)
16280 SDValue N0 = Narrow->getOperand(0);
16281 SDValue N1 = Narrow->getOperand(1);
16282 DebugLoc DL = Narrow->getDebugLoc();
16284 // The Left side has to be a trunc.
16285 if (N0.getOpcode() != ISD::TRUNCATE)
16288 // The type of the truncated inputs.
16289 EVT WideVT = N0->getOperand(0)->getValueType(0);
16293 // The right side has to be a 'trunc' or a constant vector.
16294 bool RHSTrunc = N1.getOpcode() == ISD::TRUNCATE;
16295 bool RHSConst = (isSplatVector(N1.getNode()) &&
16296 isa<ConstantSDNode>(N1->getOperand(0)));
16297 if (!RHSTrunc && !RHSConst)
16300 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
16302 if (!TLI.isOperationLegalOrPromote(Narrow->getOpcode(), WideVT))
16305 // Set N0 and N1 to hold the inputs to the new wide operation.
16306 N0 = N0->getOperand(0);
16308 N1 = DAG.getNode(ISD::ZERO_EXTEND, DL, WideVT.getScalarType(),
16309 N1->getOperand(0));
16310 SmallVector<SDValue, 8> C(WideVT.getVectorNumElements(), N1);
16311 N1 = DAG.getNode(ISD::BUILD_VECTOR, DL, WideVT, &C[0], C.size());
16312 } else if (RHSTrunc) {
16313 N1 = N1->getOperand(0);
16316 // Generate the wide operation.
16317 SDValue Op = DAG.getNode(Narrow->getOpcode(), DL, WideVT, N0, N1);
16318 unsigned Opcode = N->getOpcode();
16320 case ISD::ANY_EXTEND:
16322 case ISD::ZERO_EXTEND: {
16323 unsigned InBits = NarrowVT.getScalarType().getSizeInBits();
16324 APInt Mask = APInt::getAllOnesValue(InBits);
16325 Mask = Mask.zext(VT.getScalarType().getSizeInBits());
16326 return DAG.getNode(ISD::AND, DL, VT,
16327 Op, DAG.getConstant(Mask, VT));
16329 case ISD::SIGN_EXTEND:
16330 return DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, VT,
16331 Op, DAG.getValueType(NarrowVT));
16333 llvm_unreachable("Unexpected opcode");
16337 static SDValue PerformAndCombine(SDNode *N, SelectionDAG &DAG,
16338 TargetLowering::DAGCombinerInfo &DCI,
16339 const X86Subtarget *Subtarget) {
16340 EVT VT = N->getValueType(0);
16341 if (DCI.isBeforeLegalizeOps())
16344 SDValue R = CMPEQCombine(N, DAG, DCI, Subtarget);
16348 // Create BLSI, and BLSR instructions
16349 // BLSI is X & (-X)
16350 // BLSR is X & (X-1)
16351 if (Subtarget->hasBMI() && (VT == MVT::i32 || VT == MVT::i64)) {
16352 SDValue N0 = N->getOperand(0);
16353 SDValue N1 = N->getOperand(1);
16354 DebugLoc DL = N->getDebugLoc();
16356 // Check LHS for neg
16357 if (N0.getOpcode() == ISD::SUB && N0.getOperand(1) == N1 &&
16358 isZero(N0.getOperand(0)))
16359 return DAG.getNode(X86ISD::BLSI, DL, VT, N1);
16361 // Check RHS for neg
16362 if (N1.getOpcode() == ISD::SUB && N1.getOperand(1) == N0 &&
16363 isZero(N1.getOperand(0)))
16364 return DAG.getNode(X86ISD::BLSI, DL, VT, N0);
16366 // Check LHS for X-1
16367 if (N0.getOpcode() == ISD::ADD && N0.getOperand(0) == N1 &&
16368 isAllOnes(N0.getOperand(1)))
16369 return DAG.getNode(X86ISD::BLSR, DL, VT, N1);
16371 // Check RHS for X-1
16372 if (N1.getOpcode() == ISD::ADD && N1.getOperand(0) == N0 &&
16373 isAllOnes(N1.getOperand(1)))
16374 return DAG.getNode(X86ISD::BLSR, DL, VT, N0);
16379 // Want to form ANDNP nodes:
16380 // 1) In the hopes of then easily combining them with OR and AND nodes
16381 // to form PBLEND/PSIGN.
16382 // 2) To match ANDN packed intrinsics
16383 if (VT != MVT::v2i64 && VT != MVT::v4i64)
16386 SDValue N0 = N->getOperand(0);
16387 SDValue N1 = N->getOperand(1);
16388 DebugLoc DL = N->getDebugLoc();
16390 // Check LHS for vnot
16391 if (N0.getOpcode() == ISD::XOR &&
16392 //ISD::isBuildVectorAllOnes(N0.getOperand(1).getNode()))
16393 CanFoldXORWithAllOnes(N0.getOperand(1).getNode()))
16394 return DAG.getNode(X86ISD::ANDNP, DL, VT, N0.getOperand(0), N1);
16396 // Check RHS for vnot
16397 if (N1.getOpcode() == ISD::XOR &&
16398 //ISD::isBuildVectorAllOnes(N1.getOperand(1).getNode()))
16399 CanFoldXORWithAllOnes(N1.getOperand(1).getNode()))
16400 return DAG.getNode(X86ISD::ANDNP, DL, VT, N1.getOperand(0), N0);
16405 static SDValue PerformOrCombine(SDNode *N, SelectionDAG &DAG,
16406 TargetLowering::DAGCombinerInfo &DCI,
16407 const X86Subtarget *Subtarget) {
16408 EVT VT = N->getValueType(0);
16409 if (DCI.isBeforeLegalizeOps())
16412 SDValue R = CMPEQCombine(N, DAG, DCI, Subtarget);
16416 SDValue N0 = N->getOperand(0);
16417 SDValue N1 = N->getOperand(1);
16419 // look for psign/blend
16420 if (VT == MVT::v2i64 || VT == MVT::v4i64) {
16421 if (!Subtarget->hasSSSE3() ||
16422 (VT == MVT::v4i64 && !Subtarget->hasInt256()))
16425 // Canonicalize pandn to RHS
16426 if (N0.getOpcode() == X86ISD::ANDNP)
16428 // or (and (m, y), (pandn m, x))
16429 if (N0.getOpcode() == ISD::AND && N1.getOpcode() == X86ISD::ANDNP) {
16430 SDValue Mask = N1.getOperand(0);
16431 SDValue X = N1.getOperand(1);
16433 if (N0.getOperand(0) == Mask)
16434 Y = N0.getOperand(1);
16435 if (N0.getOperand(1) == Mask)
16436 Y = N0.getOperand(0);
16438 // Check to see if the mask appeared in both the AND and ANDNP and
16442 // Validate that X, Y, and Mask are BIT_CONVERTS, and see through them.
16443 // Look through mask bitcast.
16444 if (Mask.getOpcode() == ISD::BITCAST)
16445 Mask = Mask.getOperand(0);
16446 if (X.getOpcode() == ISD::BITCAST)
16447 X = X.getOperand(0);
16448 if (Y.getOpcode() == ISD::BITCAST)
16449 Y = Y.getOperand(0);
16451 EVT MaskVT = Mask.getValueType();
16453 // Validate that the Mask operand is a vector sra node.
16454 // FIXME: what to do for bytes, since there is a psignb/pblendvb, but
16455 // there is no psrai.b
16456 unsigned EltBits = MaskVT.getVectorElementType().getSizeInBits();
16457 unsigned SraAmt = ~0;
16458 if (Mask.getOpcode() == ISD::SRA) {
16459 SDValue Amt = Mask.getOperand(1);
16460 if (isSplatVector(Amt.getNode())) {
16461 SDValue SclrAmt = Amt->getOperand(0);
16462 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(SclrAmt))
16463 SraAmt = C->getZExtValue();
16465 } else if (Mask.getOpcode() == X86ISD::VSRAI) {
16466 SDValue SraC = Mask.getOperand(1);
16467 SraAmt = cast<ConstantSDNode>(SraC)->getZExtValue();
16469 if ((SraAmt + 1) != EltBits)
16472 DebugLoc DL = N->getDebugLoc();
16474 // Now we know we at least have a plendvb with the mask val. See if
16475 // we can form a psignb/w/d.
16476 // psign = x.type == y.type == mask.type && y = sub(0, x);
16477 if (Y.getOpcode() == ISD::SUB && Y.getOperand(1) == X &&
16478 ISD::isBuildVectorAllZeros(Y.getOperand(0).getNode()) &&
16479 X.getValueType() == MaskVT && Y.getValueType() == MaskVT) {
16480 assert((EltBits == 8 || EltBits == 16 || EltBits == 32) &&
16481 "Unsupported VT for PSIGN");
16482 Mask = DAG.getNode(X86ISD::PSIGN, DL, MaskVT, X, Mask.getOperand(0));
16483 return DAG.getNode(ISD::BITCAST, DL, VT, Mask);
16485 // PBLENDVB only available on SSE 4.1
16486 if (!Subtarget->hasSSE41())
16489 EVT BlendVT = (VT == MVT::v4i64) ? MVT::v32i8 : MVT::v16i8;
16491 X = DAG.getNode(ISD::BITCAST, DL, BlendVT, X);
16492 Y = DAG.getNode(ISD::BITCAST, DL, BlendVT, Y);
16493 Mask = DAG.getNode(ISD::BITCAST, DL, BlendVT, Mask);
16494 Mask = DAG.getNode(ISD::VSELECT, DL, BlendVT, Mask, Y, X);
16495 return DAG.getNode(ISD::BITCAST, DL, VT, Mask);
16499 if (VT != MVT::i16 && VT != MVT::i32 && VT != MVT::i64)
16502 // fold (or (x << c) | (y >> (64 - c))) ==> (shld64 x, y, c)
16503 if (N0.getOpcode() == ISD::SRL && N1.getOpcode() == ISD::SHL)
16505 if (N0.getOpcode() != ISD::SHL || N1.getOpcode() != ISD::SRL)
16507 if (!N0.hasOneUse() || !N1.hasOneUse())
16510 SDValue ShAmt0 = N0.getOperand(1);
16511 if (ShAmt0.getValueType() != MVT::i8)
16513 SDValue ShAmt1 = N1.getOperand(1);
16514 if (ShAmt1.getValueType() != MVT::i8)
16516 if (ShAmt0.getOpcode() == ISD::TRUNCATE)
16517 ShAmt0 = ShAmt0.getOperand(0);
16518 if (ShAmt1.getOpcode() == ISD::TRUNCATE)
16519 ShAmt1 = ShAmt1.getOperand(0);
16521 DebugLoc DL = N->getDebugLoc();
16522 unsigned Opc = X86ISD::SHLD;
16523 SDValue Op0 = N0.getOperand(0);
16524 SDValue Op1 = N1.getOperand(0);
16525 if (ShAmt0.getOpcode() == ISD::SUB) {
16526 Opc = X86ISD::SHRD;
16527 std::swap(Op0, Op1);
16528 std::swap(ShAmt0, ShAmt1);
16531 unsigned Bits = VT.getSizeInBits();
16532 if (ShAmt1.getOpcode() == ISD::SUB) {
16533 SDValue Sum = ShAmt1.getOperand(0);
16534 if (ConstantSDNode *SumC = dyn_cast<ConstantSDNode>(Sum)) {
16535 SDValue ShAmt1Op1 = ShAmt1.getOperand(1);
16536 if (ShAmt1Op1.getNode()->getOpcode() == ISD::TRUNCATE)
16537 ShAmt1Op1 = ShAmt1Op1.getOperand(0);
16538 if (SumC->getSExtValue() == Bits && ShAmt1Op1 == ShAmt0)
16539 return DAG.getNode(Opc, DL, VT,
16541 DAG.getNode(ISD::TRUNCATE, DL,
16544 } else if (ConstantSDNode *ShAmt1C = dyn_cast<ConstantSDNode>(ShAmt1)) {
16545 ConstantSDNode *ShAmt0C = dyn_cast<ConstantSDNode>(ShAmt0);
16547 ShAmt0C->getSExtValue() + ShAmt1C->getSExtValue() == Bits)
16548 return DAG.getNode(Opc, DL, VT,
16549 N0.getOperand(0), N1.getOperand(0),
16550 DAG.getNode(ISD::TRUNCATE, DL,
16557 // Generate NEG and CMOV for integer abs.
16558 static SDValue performIntegerAbsCombine(SDNode *N, SelectionDAG &DAG) {
16559 EVT VT = N->getValueType(0);
16561 // Since X86 does not have CMOV for 8-bit integer, we don't convert
16562 // 8-bit integer abs to NEG and CMOV.
16563 if (VT.isInteger() && VT.getSizeInBits() == 8)
16566 SDValue N0 = N->getOperand(0);
16567 SDValue N1 = N->getOperand(1);
16568 DebugLoc DL = N->getDebugLoc();
16570 // Check pattern of XOR(ADD(X,Y), Y) where Y is SRA(X, size(X)-1)
16571 // and change it to SUB and CMOV.
16572 if (VT.isInteger() && N->getOpcode() == ISD::XOR &&
16573 N0.getOpcode() == ISD::ADD &&
16574 N0.getOperand(1) == N1 &&
16575 N1.getOpcode() == ISD::SRA &&
16576 N1.getOperand(0) == N0.getOperand(0))
16577 if (ConstantSDNode *Y1C = dyn_cast<ConstantSDNode>(N1.getOperand(1)))
16578 if (Y1C->getAPIntValue() == VT.getSizeInBits()-1) {
16579 // Generate SUB & CMOV.
16580 SDValue Neg = DAG.getNode(X86ISD::SUB, DL, DAG.getVTList(VT, MVT::i32),
16581 DAG.getConstant(0, VT), N0.getOperand(0));
16583 SDValue Ops[] = { N0.getOperand(0), Neg,
16584 DAG.getConstant(X86::COND_GE, MVT::i8),
16585 SDValue(Neg.getNode(), 1) };
16586 return DAG.getNode(X86ISD::CMOV, DL, DAG.getVTList(VT, MVT::Glue),
16587 Ops, array_lengthof(Ops));
16592 // PerformXorCombine - Attempts to turn XOR nodes into BLSMSK nodes
16593 static SDValue PerformXorCombine(SDNode *N, SelectionDAG &DAG,
16594 TargetLowering::DAGCombinerInfo &DCI,
16595 const X86Subtarget *Subtarget) {
16596 EVT VT = N->getValueType(0);
16597 if (DCI.isBeforeLegalizeOps())
16600 if (Subtarget->hasCMov()) {
16601 SDValue RV = performIntegerAbsCombine(N, DAG);
16606 // Try forming BMI if it is available.
16607 if (!Subtarget->hasBMI())
16610 if (VT != MVT::i32 && VT != MVT::i64)
16613 assert(Subtarget->hasBMI() && "Creating BLSMSK requires BMI instructions");
16615 // Create BLSMSK instructions by finding X ^ (X-1)
16616 SDValue N0 = N->getOperand(0);
16617 SDValue N1 = N->getOperand(1);
16618 DebugLoc DL = N->getDebugLoc();
16620 if (N0.getOpcode() == ISD::ADD && N0.getOperand(0) == N1 &&
16621 isAllOnes(N0.getOperand(1)))
16622 return DAG.getNode(X86ISD::BLSMSK, DL, VT, N1);
16624 if (N1.getOpcode() == ISD::ADD && N1.getOperand(0) == N0 &&
16625 isAllOnes(N1.getOperand(1)))
16626 return DAG.getNode(X86ISD::BLSMSK, DL, VT, N0);
16631 /// PerformLOADCombine - Do target-specific dag combines on LOAD nodes.
16632 static SDValue PerformLOADCombine(SDNode *N, SelectionDAG &DAG,
16633 TargetLowering::DAGCombinerInfo &DCI,
16634 const X86Subtarget *Subtarget) {
16635 LoadSDNode *Ld = cast<LoadSDNode>(N);
16636 EVT RegVT = Ld->getValueType(0);
16637 EVT MemVT = Ld->getMemoryVT();
16638 DebugLoc dl = Ld->getDebugLoc();
16639 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
16640 unsigned RegSz = RegVT.getSizeInBits();
16642 ISD::LoadExtType Ext = Ld->getExtensionType();
16643 unsigned Alignment = Ld->getAlignment();
16644 bool IsAligned = Alignment == 0 || Alignment == MemVT.getSizeInBits()/8;
16646 // On Sandybridge unaligned 256bit loads are inefficient.
16647 if (RegVT.is256BitVector() && !Subtarget->hasInt256() &&
16648 !DCI.isBeforeLegalizeOps() && !IsAligned && Ext == ISD::NON_EXTLOAD) {
16649 unsigned NumElems = RegVT.getVectorNumElements();
16653 SDValue Ptr = Ld->getBasePtr();
16654 SDValue Increment = DAG.getConstant(16, TLI.getPointerTy());
16656 EVT HalfVT = EVT::getVectorVT(*DAG.getContext(), MemVT.getScalarType(),
16658 SDValue Load1 = DAG.getLoad(HalfVT, dl, Ld->getChain(), Ptr,
16659 Ld->getPointerInfo(), Ld->isVolatile(),
16660 Ld->isNonTemporal(), Ld->isInvariant(),
16662 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr, Increment);
16663 SDValue Load2 = DAG.getLoad(HalfVT, dl, Ld->getChain(), Ptr,
16664 Ld->getPointerInfo(), Ld->isVolatile(),
16665 Ld->isNonTemporal(), Ld->isInvariant(),
16666 std::max(Alignment/2U, 1U));
16667 SDValue TF = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
16669 Load2.getValue(1));
16671 SDValue NewVec = DAG.getUNDEF(RegVT);
16672 NewVec = Insert128BitVector(NewVec, Load1, 0, DAG, dl);
16673 NewVec = Insert128BitVector(NewVec, Load2, NumElems/2, DAG, dl);
16674 return DCI.CombineTo(N, NewVec, TF, true);
16677 // If this is a vector EXT Load then attempt to optimize it using a
16678 // shuffle. If SSSE3 is not available we may emit an illegal shuffle but the
16679 // expansion is still better than scalar code.
16680 // We generate X86ISD::VSEXT for SEXTLOADs if it's available, otherwise we'll
16681 // emit a shuffle and a arithmetic shift.
16682 // TODO: It is possible to support ZExt by zeroing the undef values
16683 // during the shuffle phase or after the shuffle.
16684 if (RegVT.isVector() && RegVT.isInteger() && Subtarget->hasSSE2() &&
16685 (Ext == ISD::EXTLOAD || Ext == ISD::SEXTLOAD)) {
16686 assert(MemVT != RegVT && "Cannot extend to the same type");
16687 assert(MemVT.isVector() && "Must load a vector from memory");
16689 unsigned NumElems = RegVT.getVectorNumElements();
16690 unsigned MemSz = MemVT.getSizeInBits();
16691 assert(RegSz > MemSz && "Register size must be greater than the mem size");
16693 if (Ext == ISD::SEXTLOAD && RegSz == 256 && !Subtarget->hasInt256())
16696 // All sizes must be a power of two.
16697 if (!isPowerOf2_32(RegSz * MemSz * NumElems))
16700 // Attempt to load the original value using scalar loads.
16701 // Find the largest scalar type that divides the total loaded size.
16702 MVT SclrLoadTy = MVT::i8;
16703 for (unsigned tp = MVT::FIRST_INTEGER_VALUETYPE;
16704 tp < MVT::LAST_INTEGER_VALUETYPE; ++tp) {
16705 MVT Tp = (MVT::SimpleValueType)tp;
16706 if (TLI.isTypeLegal(Tp) && ((MemSz % Tp.getSizeInBits()) == 0)) {
16711 // On 32bit systems, we can't save 64bit integers. Try bitcasting to F64.
16712 if (TLI.isTypeLegal(MVT::f64) && SclrLoadTy.getSizeInBits() < 64 &&
16714 SclrLoadTy = MVT::f64;
16716 // Calculate the number of scalar loads that we need to perform
16717 // in order to load our vector from memory.
16718 unsigned NumLoads = MemSz / SclrLoadTy.getSizeInBits();
16719 if (Ext == ISD::SEXTLOAD && NumLoads > 1)
16722 unsigned loadRegZize = RegSz;
16723 if (Ext == ISD::SEXTLOAD && RegSz == 256)
16726 // Represent our vector as a sequence of elements which are the
16727 // largest scalar that we can load.
16728 EVT LoadUnitVecVT = EVT::getVectorVT(*DAG.getContext(), SclrLoadTy,
16729 loadRegZize/SclrLoadTy.getSizeInBits());
16731 // Represent the data using the same element type that is stored in
16732 // memory. In practice, we ''widen'' MemVT.
16734 EVT::getVectorVT(*DAG.getContext(), MemVT.getScalarType(),
16735 loadRegZize/MemVT.getScalarType().getSizeInBits());
16737 assert(WideVecVT.getSizeInBits() == LoadUnitVecVT.getSizeInBits() &&
16738 "Invalid vector type");
16740 // We can't shuffle using an illegal type.
16741 if (!TLI.isTypeLegal(WideVecVT))
16744 SmallVector<SDValue, 8> Chains;
16745 SDValue Ptr = Ld->getBasePtr();
16746 SDValue Increment = DAG.getConstant(SclrLoadTy.getSizeInBits()/8,
16747 TLI.getPointerTy());
16748 SDValue Res = DAG.getUNDEF(LoadUnitVecVT);
16750 for (unsigned i = 0; i < NumLoads; ++i) {
16751 // Perform a single load.
16752 SDValue ScalarLoad = DAG.getLoad(SclrLoadTy, dl, Ld->getChain(),
16753 Ptr, Ld->getPointerInfo(),
16754 Ld->isVolatile(), Ld->isNonTemporal(),
16755 Ld->isInvariant(), Ld->getAlignment());
16756 Chains.push_back(ScalarLoad.getValue(1));
16757 // Create the first element type using SCALAR_TO_VECTOR in order to avoid
16758 // another round of DAGCombining.
16760 Res = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, LoadUnitVecVT, ScalarLoad);
16762 Res = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, LoadUnitVecVT, Res,
16763 ScalarLoad, DAG.getIntPtrConstant(i));
16765 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr, Increment);
16768 SDValue TF = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &Chains[0],
16771 // Bitcast the loaded value to a vector of the original element type, in
16772 // the size of the target vector type.
16773 SDValue SlicedVec = DAG.getNode(ISD::BITCAST, dl, WideVecVT, Res);
16774 unsigned SizeRatio = RegSz/MemSz;
16776 if (Ext == ISD::SEXTLOAD) {
16777 // If we have SSE4.1 we can directly emit a VSEXT node.
16778 if (Subtarget->hasSSE41()) {
16779 SDValue Sext = DAG.getNode(X86ISD::VSEXT, dl, RegVT, SlicedVec);
16780 return DCI.CombineTo(N, Sext, TF, true);
16783 // Otherwise we'll shuffle the small elements in the high bits of the
16784 // larger type and perform an arithmetic shift. If the shift is not legal
16785 // it's better to scalarize.
16786 if (!TLI.isOperationLegalOrCustom(ISD::SRA, RegVT))
16789 // Redistribute the loaded elements into the different locations.
16790 SmallVector<int, 8> ShuffleVec(NumElems * SizeRatio, -1);
16791 for (unsigned i = 0; i != NumElems; ++i)
16792 ShuffleVec[i*SizeRatio + SizeRatio-1] = i;
16794 SDValue Shuff = DAG.getVectorShuffle(WideVecVT, dl, SlicedVec,
16795 DAG.getUNDEF(WideVecVT),
16798 Shuff = DAG.getNode(ISD::BITCAST, dl, RegVT, Shuff);
16800 // Build the arithmetic shift.
16801 unsigned Amt = RegVT.getVectorElementType().getSizeInBits() -
16802 MemVT.getVectorElementType().getSizeInBits();
16803 Shuff = DAG.getNode(ISD::SRA, dl, RegVT, Shuff,
16804 DAG.getConstant(Amt, RegVT));
16806 return DCI.CombineTo(N, Shuff, TF, true);
16809 // Redistribute the loaded elements into the different locations.
16810 SmallVector<int, 8> ShuffleVec(NumElems * SizeRatio, -1);
16811 for (unsigned i = 0; i != NumElems; ++i)
16812 ShuffleVec[i*SizeRatio] = i;
16814 SDValue Shuff = DAG.getVectorShuffle(WideVecVT, dl, SlicedVec,
16815 DAG.getUNDEF(WideVecVT),
16818 // Bitcast to the requested type.
16819 Shuff = DAG.getNode(ISD::BITCAST, dl, RegVT, Shuff);
16820 // Replace the original load with the new sequence
16821 // and return the new chain.
16822 return DCI.CombineTo(N, Shuff, TF, true);
16828 /// PerformSTORECombine - Do target-specific dag combines on STORE nodes.
16829 static SDValue PerformSTORECombine(SDNode *N, SelectionDAG &DAG,
16830 const X86Subtarget *Subtarget) {
16831 StoreSDNode *St = cast<StoreSDNode>(N);
16832 EVT VT = St->getValue().getValueType();
16833 EVT StVT = St->getMemoryVT();
16834 DebugLoc dl = St->getDebugLoc();
16835 SDValue StoredVal = St->getOperand(1);
16836 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
16837 unsigned Alignment = St->getAlignment();
16838 bool IsAligned = Alignment == 0 || Alignment == VT.getSizeInBits()/8;
16840 // If we are saving a concatenation of two XMM registers, perform two stores.
16841 // On Sandy Bridge, 256-bit memory operations are executed by two
16842 // 128-bit ports. However, on Haswell it is better to issue a single 256-bit
16843 // memory operation.
16844 if (VT.is256BitVector() && !Subtarget->hasInt256() &&
16845 StVT == VT && !IsAligned) {
16846 unsigned NumElems = VT.getVectorNumElements();
16850 SDValue Value0 = Extract128BitVector(StoredVal, 0, DAG, dl);
16851 SDValue Value1 = Extract128BitVector(StoredVal, NumElems/2, DAG, dl);
16853 SDValue Stride = DAG.getConstant(16, TLI.getPointerTy());
16854 SDValue Ptr0 = St->getBasePtr();
16855 SDValue Ptr1 = DAG.getNode(ISD::ADD, dl, Ptr0.getValueType(), Ptr0, Stride);
16857 SDValue Ch0 = DAG.getStore(St->getChain(), dl, Value0, Ptr0,
16858 St->getPointerInfo(), St->isVolatile(),
16859 St->isNonTemporal(), Alignment);
16860 SDValue Ch1 = DAG.getStore(St->getChain(), dl, Value1, Ptr1,
16861 St->getPointerInfo(), St->isVolatile(),
16862 St->isNonTemporal(),
16863 std::max(Alignment/2U, 1U));
16864 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Ch0, Ch1);
16867 // Optimize trunc store (of multiple scalars) to shuffle and store.
16868 // First, pack all of the elements in one place. Next, store to memory
16869 // in fewer chunks.
16870 if (St->isTruncatingStore() && VT.isVector()) {
16871 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
16872 unsigned NumElems = VT.getVectorNumElements();
16873 assert(StVT != VT && "Cannot truncate to the same type");
16874 unsigned FromSz = VT.getVectorElementType().getSizeInBits();
16875 unsigned ToSz = StVT.getVectorElementType().getSizeInBits();
16877 // From, To sizes and ElemCount must be pow of two
16878 if (!isPowerOf2_32(NumElems * FromSz * ToSz)) return SDValue();
16879 // We are going to use the original vector elt for storing.
16880 // Accumulated smaller vector elements must be a multiple of the store size.
16881 if (0 != (NumElems * FromSz) % ToSz) return SDValue();
16883 unsigned SizeRatio = FromSz / ToSz;
16885 assert(SizeRatio * NumElems * ToSz == VT.getSizeInBits());
16887 // Create a type on which we perform the shuffle
16888 EVT WideVecVT = EVT::getVectorVT(*DAG.getContext(),
16889 StVT.getScalarType(), NumElems*SizeRatio);
16891 assert(WideVecVT.getSizeInBits() == VT.getSizeInBits());
16893 SDValue WideVec = DAG.getNode(ISD::BITCAST, dl, WideVecVT, St->getValue());
16894 SmallVector<int, 8> ShuffleVec(NumElems * SizeRatio, -1);
16895 for (unsigned i = 0; i != NumElems; ++i)
16896 ShuffleVec[i] = i * SizeRatio;
16898 // Can't shuffle using an illegal type.
16899 if (!TLI.isTypeLegal(WideVecVT))
16902 SDValue Shuff = DAG.getVectorShuffle(WideVecVT, dl, WideVec,
16903 DAG.getUNDEF(WideVecVT),
16905 // At this point all of the data is stored at the bottom of the
16906 // register. We now need to save it to mem.
16908 // Find the largest store unit
16909 MVT StoreType = MVT::i8;
16910 for (unsigned tp = MVT::FIRST_INTEGER_VALUETYPE;
16911 tp < MVT::LAST_INTEGER_VALUETYPE; ++tp) {
16912 MVT Tp = (MVT::SimpleValueType)tp;
16913 if (TLI.isTypeLegal(Tp) && Tp.getSizeInBits() <= NumElems * ToSz)
16917 // On 32bit systems, we can't save 64bit integers. Try bitcasting to F64.
16918 if (TLI.isTypeLegal(MVT::f64) && StoreType.getSizeInBits() < 64 &&
16919 (64 <= NumElems * ToSz))
16920 StoreType = MVT::f64;
16922 // Bitcast the original vector into a vector of store-size units
16923 EVT StoreVecVT = EVT::getVectorVT(*DAG.getContext(),
16924 StoreType, VT.getSizeInBits()/StoreType.getSizeInBits());
16925 assert(StoreVecVT.getSizeInBits() == VT.getSizeInBits());
16926 SDValue ShuffWide = DAG.getNode(ISD::BITCAST, dl, StoreVecVT, Shuff);
16927 SmallVector<SDValue, 8> Chains;
16928 SDValue Increment = DAG.getConstant(StoreType.getSizeInBits()/8,
16929 TLI.getPointerTy());
16930 SDValue Ptr = St->getBasePtr();
16932 // Perform one or more big stores into memory.
16933 for (unsigned i=0, e=(ToSz*NumElems)/StoreType.getSizeInBits(); i!=e; ++i) {
16934 SDValue SubVec = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl,
16935 StoreType, ShuffWide,
16936 DAG.getIntPtrConstant(i));
16937 SDValue Ch = DAG.getStore(St->getChain(), dl, SubVec, Ptr,
16938 St->getPointerInfo(), St->isVolatile(),
16939 St->isNonTemporal(), St->getAlignment());
16940 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr, Increment);
16941 Chains.push_back(Ch);
16944 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &Chains[0],
16948 // Turn load->store of MMX types into GPR load/stores. This avoids clobbering
16949 // the FP state in cases where an emms may be missing.
16950 // A preferable solution to the general problem is to figure out the right
16951 // places to insert EMMS. This qualifies as a quick hack.
16953 // Similarly, turn load->store of i64 into double load/stores in 32-bit mode.
16954 if (VT.getSizeInBits() != 64)
16957 const Function *F = DAG.getMachineFunction().getFunction();
16958 bool NoImplicitFloatOps = F->getAttributes().
16959 hasAttribute(AttributeSet::FunctionIndex, Attribute::NoImplicitFloat);
16960 bool F64IsLegal = !DAG.getTarget().Options.UseSoftFloat && !NoImplicitFloatOps
16961 && Subtarget->hasSSE2();
16962 if ((VT.isVector() ||
16963 (VT == MVT::i64 && F64IsLegal && !Subtarget->is64Bit())) &&
16964 isa<LoadSDNode>(St->getValue()) &&
16965 !cast<LoadSDNode>(St->getValue())->isVolatile() &&
16966 St->getChain().hasOneUse() && !St->isVolatile()) {
16967 SDNode* LdVal = St->getValue().getNode();
16968 LoadSDNode *Ld = 0;
16969 int TokenFactorIndex = -1;
16970 SmallVector<SDValue, 8> Ops;
16971 SDNode* ChainVal = St->getChain().getNode();
16972 // Must be a store of a load. We currently handle two cases: the load
16973 // is a direct child, and it's under an intervening TokenFactor. It is
16974 // possible to dig deeper under nested TokenFactors.
16975 if (ChainVal == LdVal)
16976 Ld = cast<LoadSDNode>(St->getChain());
16977 else if (St->getValue().hasOneUse() &&
16978 ChainVal->getOpcode() == ISD::TokenFactor) {
16979 for (unsigned i = 0, e = ChainVal->getNumOperands(); i != e; ++i) {
16980 if (ChainVal->getOperand(i).getNode() == LdVal) {
16981 TokenFactorIndex = i;
16982 Ld = cast<LoadSDNode>(St->getValue());
16984 Ops.push_back(ChainVal->getOperand(i));
16988 if (!Ld || !ISD::isNormalLoad(Ld))
16991 // If this is not the MMX case, i.e. we are just turning i64 load/store
16992 // into f64 load/store, avoid the transformation if there are multiple
16993 // uses of the loaded value.
16994 if (!VT.isVector() && !Ld->hasNUsesOfValue(1, 0))
16997 DebugLoc LdDL = Ld->getDebugLoc();
16998 DebugLoc StDL = N->getDebugLoc();
16999 // If we are a 64-bit capable x86, lower to a single movq load/store pair.
17000 // Otherwise, if it's legal to use f64 SSE instructions, use f64 load/store
17002 if (Subtarget->is64Bit() || F64IsLegal) {
17003 EVT LdVT = Subtarget->is64Bit() ? MVT::i64 : MVT::f64;
17004 SDValue NewLd = DAG.getLoad(LdVT, LdDL, Ld->getChain(), Ld->getBasePtr(),
17005 Ld->getPointerInfo(), Ld->isVolatile(),
17006 Ld->isNonTemporal(), Ld->isInvariant(),
17007 Ld->getAlignment());
17008 SDValue NewChain = NewLd.getValue(1);
17009 if (TokenFactorIndex != -1) {
17010 Ops.push_back(NewChain);
17011 NewChain = DAG.getNode(ISD::TokenFactor, LdDL, MVT::Other, &Ops[0],
17014 return DAG.getStore(NewChain, StDL, NewLd, St->getBasePtr(),
17015 St->getPointerInfo(),
17016 St->isVolatile(), St->isNonTemporal(),
17017 St->getAlignment());
17020 // Otherwise, lower to two pairs of 32-bit loads / stores.
17021 SDValue LoAddr = Ld->getBasePtr();
17022 SDValue HiAddr = DAG.getNode(ISD::ADD, LdDL, MVT::i32, LoAddr,
17023 DAG.getConstant(4, MVT::i32));
17025 SDValue LoLd = DAG.getLoad(MVT::i32, LdDL, Ld->getChain(), LoAddr,
17026 Ld->getPointerInfo(),
17027 Ld->isVolatile(), Ld->isNonTemporal(),
17028 Ld->isInvariant(), Ld->getAlignment());
17029 SDValue HiLd = DAG.getLoad(MVT::i32, LdDL, Ld->getChain(), HiAddr,
17030 Ld->getPointerInfo().getWithOffset(4),
17031 Ld->isVolatile(), Ld->isNonTemporal(),
17033 MinAlign(Ld->getAlignment(), 4));
17035 SDValue NewChain = LoLd.getValue(1);
17036 if (TokenFactorIndex != -1) {
17037 Ops.push_back(LoLd);
17038 Ops.push_back(HiLd);
17039 NewChain = DAG.getNode(ISD::TokenFactor, LdDL, MVT::Other, &Ops[0],
17043 LoAddr = St->getBasePtr();
17044 HiAddr = DAG.getNode(ISD::ADD, StDL, MVT::i32, LoAddr,
17045 DAG.getConstant(4, MVT::i32));
17047 SDValue LoSt = DAG.getStore(NewChain, StDL, LoLd, LoAddr,
17048 St->getPointerInfo(),
17049 St->isVolatile(), St->isNonTemporal(),
17050 St->getAlignment());
17051 SDValue HiSt = DAG.getStore(NewChain, StDL, HiLd, HiAddr,
17052 St->getPointerInfo().getWithOffset(4),
17054 St->isNonTemporal(),
17055 MinAlign(St->getAlignment(), 4));
17056 return DAG.getNode(ISD::TokenFactor, StDL, MVT::Other, LoSt, HiSt);
17061 /// isHorizontalBinOp - Return 'true' if this vector operation is "horizontal"
17062 /// and return the operands for the horizontal operation in LHS and RHS. A
17063 /// horizontal operation performs the binary operation on successive elements
17064 /// of its first operand, then on successive elements of its second operand,
17065 /// returning the resulting values in a vector. For example, if
17066 /// A = < float a0, float a1, float a2, float a3 >
17068 /// B = < float b0, float b1, float b2, float b3 >
17069 /// then the result of doing a horizontal operation on A and B is
17070 /// A horizontal-op B = < a0 op a1, a2 op a3, b0 op b1, b2 op b3 >.
17071 /// In short, LHS and RHS are inspected to see if LHS op RHS is of the form
17072 /// A horizontal-op B, for some already available A and B, and if so then LHS is
17073 /// set to A, RHS to B, and the routine returns 'true'.
17074 /// Note that the binary operation should have the property that if one of the
17075 /// operands is UNDEF then the result is UNDEF.
17076 static bool isHorizontalBinOp(SDValue &LHS, SDValue &RHS, bool IsCommutative) {
17077 // Look for the following pattern: if
17078 // A = < float a0, float a1, float a2, float a3 >
17079 // B = < float b0, float b1, float b2, float b3 >
17081 // LHS = VECTOR_SHUFFLE A, B, <0, 2, 4, 6>
17082 // RHS = VECTOR_SHUFFLE A, B, <1, 3, 5, 7>
17083 // then LHS op RHS = < a0 op a1, a2 op a3, b0 op b1, b2 op b3 >
17084 // which is A horizontal-op B.
17086 // At least one of the operands should be a vector shuffle.
17087 if (LHS.getOpcode() != ISD::VECTOR_SHUFFLE &&
17088 RHS.getOpcode() != ISD::VECTOR_SHUFFLE)
17091 EVT VT = LHS.getValueType();
17093 assert((VT.is128BitVector() || VT.is256BitVector()) &&
17094 "Unsupported vector type for horizontal add/sub");
17096 // Handle 128 and 256-bit vector lengths. AVX defines horizontal add/sub to
17097 // operate independently on 128-bit lanes.
17098 unsigned NumElts = VT.getVectorNumElements();
17099 unsigned NumLanes = VT.getSizeInBits()/128;
17100 unsigned NumLaneElts = NumElts / NumLanes;
17101 assert((NumLaneElts % 2 == 0) &&
17102 "Vector type should have an even number of elements in each lane");
17103 unsigned HalfLaneElts = NumLaneElts/2;
17105 // View LHS in the form
17106 // LHS = VECTOR_SHUFFLE A, B, LMask
17107 // If LHS is not a shuffle then pretend it is the shuffle
17108 // LHS = VECTOR_SHUFFLE LHS, undef, <0, 1, ..., N-1>
17109 // NOTE: in what follows a default initialized SDValue represents an UNDEF of
17112 SmallVector<int, 16> LMask(NumElts);
17113 if (LHS.getOpcode() == ISD::VECTOR_SHUFFLE) {
17114 if (LHS.getOperand(0).getOpcode() != ISD::UNDEF)
17115 A = LHS.getOperand(0);
17116 if (LHS.getOperand(1).getOpcode() != ISD::UNDEF)
17117 B = LHS.getOperand(1);
17118 ArrayRef<int> Mask = cast<ShuffleVectorSDNode>(LHS.getNode())->getMask();
17119 std::copy(Mask.begin(), Mask.end(), LMask.begin());
17121 if (LHS.getOpcode() != ISD::UNDEF)
17123 for (unsigned i = 0; i != NumElts; ++i)
17127 // Likewise, view RHS in the form
17128 // RHS = VECTOR_SHUFFLE C, D, RMask
17130 SmallVector<int, 16> RMask(NumElts);
17131 if (RHS.getOpcode() == ISD::VECTOR_SHUFFLE) {
17132 if (RHS.getOperand(0).getOpcode() != ISD::UNDEF)
17133 C = RHS.getOperand(0);
17134 if (RHS.getOperand(1).getOpcode() != ISD::UNDEF)
17135 D = RHS.getOperand(1);
17136 ArrayRef<int> Mask = cast<ShuffleVectorSDNode>(RHS.getNode())->getMask();
17137 std::copy(Mask.begin(), Mask.end(), RMask.begin());
17139 if (RHS.getOpcode() != ISD::UNDEF)
17141 for (unsigned i = 0; i != NumElts; ++i)
17145 // Check that the shuffles are both shuffling the same vectors.
17146 if (!(A == C && B == D) && !(A == D && B == C))
17149 // If everything is UNDEF then bail out: it would be better to fold to UNDEF.
17150 if (!A.getNode() && !B.getNode())
17153 // If A and B occur in reverse order in RHS, then "swap" them (which means
17154 // rewriting the mask).
17156 CommuteVectorShuffleMask(RMask, NumElts);
17158 // At this point LHS and RHS are equivalent to
17159 // LHS = VECTOR_SHUFFLE A, B, LMask
17160 // RHS = VECTOR_SHUFFLE A, B, RMask
17161 // Check that the masks correspond to performing a horizontal operation.
17162 for (unsigned i = 0; i != NumElts; ++i) {
17163 int LIdx = LMask[i], RIdx = RMask[i];
17165 // Ignore any UNDEF components.
17166 if (LIdx < 0 || RIdx < 0 ||
17167 (!A.getNode() && (LIdx < (int)NumElts || RIdx < (int)NumElts)) ||
17168 (!B.getNode() && (LIdx >= (int)NumElts || RIdx >= (int)NumElts)))
17171 // Check that successive elements are being operated on. If not, this is
17172 // not a horizontal operation.
17173 unsigned Src = (i/HalfLaneElts) % 2; // each lane is split between srcs
17174 unsigned LaneStart = (i/NumLaneElts) * NumLaneElts;
17175 int Index = 2*(i%HalfLaneElts) + NumElts*Src + LaneStart;
17176 if (!(LIdx == Index && RIdx == Index + 1) &&
17177 !(IsCommutative && LIdx == Index + 1 && RIdx == Index))
17181 LHS = A.getNode() ? A : B; // If A is 'UNDEF', use B for it.
17182 RHS = B.getNode() ? B : A; // If B is 'UNDEF', use A for it.
17186 /// PerformFADDCombine - Do target-specific dag combines on floating point adds.
17187 static SDValue PerformFADDCombine(SDNode *N, SelectionDAG &DAG,
17188 const X86Subtarget *Subtarget) {
17189 EVT VT = N->getValueType(0);
17190 SDValue LHS = N->getOperand(0);
17191 SDValue RHS = N->getOperand(1);
17193 // Try to synthesize horizontal adds from adds of shuffles.
17194 if (((Subtarget->hasSSE3() && (VT == MVT::v4f32 || VT == MVT::v2f64)) ||
17195 (Subtarget->hasFp256() && (VT == MVT::v8f32 || VT == MVT::v4f64))) &&
17196 isHorizontalBinOp(LHS, RHS, true))
17197 return DAG.getNode(X86ISD::FHADD, N->getDebugLoc(), VT, LHS, RHS);
17201 /// PerformFSUBCombine - Do target-specific dag combines on floating point subs.
17202 static SDValue PerformFSUBCombine(SDNode *N, SelectionDAG &DAG,
17203 const X86Subtarget *Subtarget) {
17204 EVT VT = N->getValueType(0);
17205 SDValue LHS = N->getOperand(0);
17206 SDValue RHS = N->getOperand(1);
17208 // Try to synthesize horizontal subs from subs of shuffles.
17209 if (((Subtarget->hasSSE3() && (VT == MVT::v4f32 || VT == MVT::v2f64)) ||
17210 (Subtarget->hasFp256() && (VT == MVT::v8f32 || VT == MVT::v4f64))) &&
17211 isHorizontalBinOp(LHS, RHS, false))
17212 return DAG.getNode(X86ISD::FHSUB, N->getDebugLoc(), VT, LHS, RHS);
17216 /// PerformFORCombine - Do target-specific dag combines on X86ISD::FOR and
17217 /// X86ISD::FXOR nodes.
17218 static SDValue PerformFORCombine(SDNode *N, SelectionDAG &DAG) {
17219 assert(N->getOpcode() == X86ISD::FOR || N->getOpcode() == X86ISD::FXOR);
17220 // F[X]OR(0.0, x) -> x
17221 // F[X]OR(x, 0.0) -> x
17222 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
17223 if (C->getValueAPF().isPosZero())
17224 return N->getOperand(1);
17225 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
17226 if (C->getValueAPF().isPosZero())
17227 return N->getOperand(0);
17231 /// PerformFMinFMaxCombine - Do target-specific dag combines on X86ISD::FMIN and
17232 /// X86ISD::FMAX nodes.
17233 static SDValue PerformFMinFMaxCombine(SDNode *N, SelectionDAG &DAG) {
17234 assert(N->getOpcode() == X86ISD::FMIN || N->getOpcode() == X86ISD::FMAX);
17236 // Only perform optimizations if UnsafeMath is used.
17237 if (!DAG.getTarget().Options.UnsafeFPMath)
17240 // If we run in unsafe-math mode, then convert the FMAX and FMIN nodes
17241 // into FMINC and FMAXC, which are Commutative operations.
17242 unsigned NewOp = 0;
17243 switch (N->getOpcode()) {
17244 default: llvm_unreachable("unknown opcode");
17245 case X86ISD::FMIN: NewOp = X86ISD::FMINC; break;
17246 case X86ISD::FMAX: NewOp = X86ISD::FMAXC; break;
17249 return DAG.getNode(NewOp, N->getDebugLoc(), N->getValueType(0),
17250 N->getOperand(0), N->getOperand(1));
17253 /// PerformFANDCombine - Do target-specific dag combines on X86ISD::FAND nodes.
17254 static SDValue PerformFANDCombine(SDNode *N, SelectionDAG &DAG) {
17255 // FAND(0.0, x) -> 0.0
17256 // FAND(x, 0.0) -> 0.0
17257 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
17258 if (C->getValueAPF().isPosZero())
17259 return N->getOperand(0);
17260 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
17261 if (C->getValueAPF().isPosZero())
17262 return N->getOperand(1);
17266 static SDValue PerformBTCombine(SDNode *N,
17268 TargetLowering::DAGCombinerInfo &DCI) {
17269 // BT ignores high bits in the bit index operand.
17270 SDValue Op1 = N->getOperand(1);
17271 if (Op1.hasOneUse()) {
17272 unsigned BitWidth = Op1.getValueSizeInBits();
17273 APInt DemandedMask = APInt::getLowBitsSet(BitWidth, Log2_32(BitWidth));
17274 APInt KnownZero, KnownOne;
17275 TargetLowering::TargetLoweringOpt TLO(DAG, !DCI.isBeforeLegalize(),
17276 !DCI.isBeforeLegalizeOps());
17277 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
17278 if (TLO.ShrinkDemandedConstant(Op1, DemandedMask) ||
17279 TLI.SimplifyDemandedBits(Op1, DemandedMask, KnownZero, KnownOne, TLO))
17280 DCI.CommitTargetLoweringOpt(TLO);
17285 static SDValue PerformVZEXT_MOVLCombine(SDNode *N, SelectionDAG &DAG) {
17286 SDValue Op = N->getOperand(0);
17287 if (Op.getOpcode() == ISD::BITCAST)
17288 Op = Op.getOperand(0);
17289 EVT VT = N->getValueType(0), OpVT = Op.getValueType();
17290 if (Op.getOpcode() == X86ISD::VZEXT_LOAD &&
17291 VT.getVectorElementType().getSizeInBits() ==
17292 OpVT.getVectorElementType().getSizeInBits()) {
17293 return DAG.getNode(ISD::BITCAST, N->getDebugLoc(), VT, Op);
17298 static SDValue PerformSIGN_EXTEND_INREGCombine(SDNode *N, SelectionDAG &DAG,
17299 const X86Subtarget *Subtarget) {
17300 EVT VT = N->getValueType(0);
17301 if (!VT.isVector())
17304 SDValue N0 = N->getOperand(0);
17305 SDValue N1 = N->getOperand(1);
17306 EVT ExtraVT = cast<VTSDNode>(N1)->getVT();
17307 DebugLoc dl = N->getDebugLoc();
17309 // The SIGN_EXTEND_INREG to v4i64 is expensive operation on the
17310 // both SSE and AVX2 since there is no sign-extended shift right
17311 // operation on a vector with 64-bit elements.
17312 //(sext_in_reg (v4i64 anyext (v4i32 x )), ExtraVT) ->
17313 // (v4i64 sext (v4i32 sext_in_reg (v4i32 x , ExtraVT)))
17314 if (VT == MVT::v4i64 && (N0.getOpcode() == ISD::ANY_EXTEND ||
17315 N0.getOpcode() == ISD::SIGN_EXTEND)) {
17316 SDValue N00 = N0.getOperand(0);
17318 // EXTLOAD has a better solution on AVX2,
17319 // it may be replaced with X86ISD::VSEXT node.
17320 if (N00.getOpcode() == ISD::LOAD && Subtarget->hasInt256())
17321 if (!ISD::isNormalLoad(N00.getNode()))
17324 if (N00.getValueType() == MVT::v4i32 && ExtraVT.getSizeInBits() < 128) {
17325 SDValue Tmp = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, MVT::v4i32,
17327 return DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i64, Tmp);
17333 static SDValue PerformSExtCombine(SDNode *N, SelectionDAG &DAG,
17334 TargetLowering::DAGCombinerInfo &DCI,
17335 const X86Subtarget *Subtarget) {
17336 if (!DCI.isBeforeLegalizeOps())
17339 if (!Subtarget->hasFp256())
17342 EVT VT = N->getValueType(0);
17343 if (VT.isVector() && VT.getSizeInBits() == 256) {
17344 SDValue R = WidenMaskArithmetic(N, DAG, DCI, Subtarget);
17352 static SDValue PerformFMACombine(SDNode *N, SelectionDAG &DAG,
17353 const X86Subtarget* Subtarget) {
17354 DebugLoc dl = N->getDebugLoc();
17355 EVT VT = N->getValueType(0);
17357 // Let legalize expand this if it isn't a legal type yet.
17358 if (!DAG.getTargetLoweringInfo().isTypeLegal(VT))
17361 EVT ScalarVT = VT.getScalarType();
17362 if ((ScalarVT != MVT::f32 && ScalarVT != MVT::f64) ||
17363 (!Subtarget->hasFMA() && !Subtarget->hasFMA4()))
17366 SDValue A = N->getOperand(0);
17367 SDValue B = N->getOperand(1);
17368 SDValue C = N->getOperand(2);
17370 bool NegA = (A.getOpcode() == ISD::FNEG);
17371 bool NegB = (B.getOpcode() == ISD::FNEG);
17372 bool NegC = (C.getOpcode() == ISD::FNEG);
17374 // Negative multiplication when NegA xor NegB
17375 bool NegMul = (NegA != NegB);
17377 A = A.getOperand(0);
17379 B = B.getOperand(0);
17381 C = C.getOperand(0);
17385 Opcode = (!NegC) ? X86ISD::FMADD : X86ISD::FMSUB;
17387 Opcode = (!NegC) ? X86ISD::FNMADD : X86ISD::FNMSUB;
17389 return DAG.getNode(Opcode, dl, VT, A, B, C);
17392 static SDValue PerformZExtCombine(SDNode *N, SelectionDAG &DAG,
17393 TargetLowering::DAGCombinerInfo &DCI,
17394 const X86Subtarget *Subtarget) {
17395 // (i32 zext (and (i8 x86isd::setcc_carry), 1)) ->
17396 // (and (i32 x86isd::setcc_carry), 1)
17397 // This eliminates the zext. This transformation is necessary because
17398 // ISD::SETCC is always legalized to i8.
17399 DebugLoc dl = N->getDebugLoc();
17400 SDValue N0 = N->getOperand(0);
17401 EVT VT = N->getValueType(0);
17403 if (N0.getOpcode() == ISD::AND &&
17405 N0.getOperand(0).hasOneUse()) {
17406 SDValue N00 = N0.getOperand(0);
17407 if (N00.getOpcode() == X86ISD::SETCC_CARRY) {
17408 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N0.getOperand(1));
17409 if (!C || C->getZExtValue() != 1)
17411 return DAG.getNode(ISD::AND, dl, VT,
17412 DAG.getNode(X86ISD::SETCC_CARRY, dl, VT,
17413 N00.getOperand(0), N00.getOperand(1)),
17414 DAG.getConstant(1, VT));
17418 if (VT.is256BitVector()) {
17419 SDValue R = WidenMaskArithmetic(N, DAG, DCI, Subtarget);
17427 // Optimize x == -y --> x+y == 0
17428 // x != -y --> x+y != 0
17429 static SDValue PerformISDSETCCCombine(SDNode *N, SelectionDAG &DAG) {
17430 ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(2))->get();
17431 SDValue LHS = N->getOperand(0);
17432 SDValue RHS = N->getOperand(1);
17434 if ((CC == ISD::SETNE || CC == ISD::SETEQ) && LHS.getOpcode() == ISD::SUB)
17435 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(LHS.getOperand(0)))
17436 if (C->getAPIntValue() == 0 && LHS.hasOneUse()) {
17437 SDValue addV = DAG.getNode(ISD::ADD, N->getDebugLoc(),
17438 LHS.getValueType(), RHS, LHS.getOperand(1));
17439 return DAG.getSetCC(N->getDebugLoc(), N->getValueType(0),
17440 addV, DAG.getConstant(0, addV.getValueType()), CC);
17442 if ((CC == ISD::SETNE || CC == ISD::SETEQ) && RHS.getOpcode() == ISD::SUB)
17443 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS.getOperand(0)))
17444 if (C->getAPIntValue() == 0 && RHS.hasOneUse()) {
17445 SDValue addV = DAG.getNode(ISD::ADD, N->getDebugLoc(),
17446 RHS.getValueType(), LHS, RHS.getOperand(1));
17447 return DAG.getSetCC(N->getDebugLoc(), N->getValueType(0),
17448 addV, DAG.getConstant(0, addV.getValueType()), CC);
17453 // Helper function of PerformSETCCCombine. It is to materialize "setb reg"
17454 // as "sbb reg,reg", since it can be extended without zext and produces
17455 // an all-ones bit which is more useful than 0/1 in some cases.
17456 static SDValue MaterializeSETB(DebugLoc DL, SDValue EFLAGS, SelectionDAG &DAG) {
17457 return DAG.getNode(ISD::AND, DL, MVT::i8,
17458 DAG.getNode(X86ISD::SETCC_CARRY, DL, MVT::i8,
17459 DAG.getConstant(X86::COND_B, MVT::i8), EFLAGS),
17460 DAG.getConstant(1, MVT::i8));
17463 // Optimize RES = X86ISD::SETCC CONDCODE, EFLAG_INPUT
17464 static SDValue PerformSETCCCombine(SDNode *N, SelectionDAG &DAG,
17465 TargetLowering::DAGCombinerInfo &DCI,
17466 const X86Subtarget *Subtarget) {
17467 DebugLoc DL = N->getDebugLoc();
17468 X86::CondCode CC = X86::CondCode(N->getConstantOperandVal(0));
17469 SDValue EFLAGS = N->getOperand(1);
17471 if (CC == X86::COND_A) {
17472 // Try to convert COND_A into COND_B in an attempt to facilitate
17473 // materializing "setb reg".
17475 // Do not flip "e > c", where "c" is a constant, because Cmp instruction
17476 // cannot take an immediate as its first operand.
17478 if (EFLAGS.getOpcode() == X86ISD::SUB && EFLAGS.hasOneUse() &&
17479 EFLAGS.getValueType().isInteger() &&
17480 !isa<ConstantSDNode>(EFLAGS.getOperand(1))) {
17481 SDValue NewSub = DAG.getNode(X86ISD::SUB, EFLAGS.getDebugLoc(),
17482 EFLAGS.getNode()->getVTList(),
17483 EFLAGS.getOperand(1), EFLAGS.getOperand(0));
17484 SDValue NewEFLAGS = SDValue(NewSub.getNode(), EFLAGS.getResNo());
17485 return MaterializeSETB(DL, NewEFLAGS, DAG);
17489 // Materialize "setb reg" as "sbb reg,reg", since it can be extended without
17490 // a zext and produces an all-ones bit which is more useful than 0/1 in some
17492 if (CC == X86::COND_B)
17493 return MaterializeSETB(DL, EFLAGS, DAG);
17497 Flags = checkBoolTestSetCCCombine(EFLAGS, CC);
17498 if (Flags.getNode()) {
17499 SDValue Cond = DAG.getConstant(CC, MVT::i8);
17500 return DAG.getNode(X86ISD::SETCC, DL, N->getVTList(), Cond, Flags);
17506 // Optimize branch condition evaluation.
17508 static SDValue PerformBrCondCombine(SDNode *N, SelectionDAG &DAG,
17509 TargetLowering::DAGCombinerInfo &DCI,
17510 const X86Subtarget *Subtarget) {
17511 DebugLoc DL = N->getDebugLoc();
17512 SDValue Chain = N->getOperand(0);
17513 SDValue Dest = N->getOperand(1);
17514 SDValue EFLAGS = N->getOperand(3);
17515 X86::CondCode CC = X86::CondCode(N->getConstantOperandVal(2));
17519 Flags = checkBoolTestSetCCCombine(EFLAGS, CC);
17520 if (Flags.getNode()) {
17521 SDValue Cond = DAG.getConstant(CC, MVT::i8);
17522 return DAG.getNode(X86ISD::BRCOND, DL, N->getVTList(), Chain, Dest, Cond,
17529 static SDValue PerformSINT_TO_FPCombine(SDNode *N, SelectionDAG &DAG,
17530 const X86TargetLowering *XTLI) {
17531 SDValue Op0 = N->getOperand(0);
17532 EVT InVT = Op0->getValueType(0);
17534 // SINT_TO_FP(v4i8) -> SINT_TO_FP(SEXT(v4i8 to v4i32))
17535 if (InVT == MVT::v8i8 || InVT == MVT::v4i8) {
17536 DebugLoc dl = N->getDebugLoc();
17537 MVT DstVT = InVT == MVT::v4i8 ? MVT::v4i32 : MVT::v8i32;
17538 SDValue P = DAG.getNode(ISD::SIGN_EXTEND, dl, DstVT, Op0);
17539 return DAG.getNode(ISD::SINT_TO_FP, dl, N->getValueType(0), P);
17542 // Transform (SINT_TO_FP (i64 ...)) into an x87 operation if we have
17543 // a 32-bit target where SSE doesn't support i64->FP operations.
17544 if (Op0.getOpcode() == ISD::LOAD) {
17545 LoadSDNode *Ld = cast<LoadSDNode>(Op0.getNode());
17546 EVT VT = Ld->getValueType(0);
17547 if (!Ld->isVolatile() && !N->getValueType(0).isVector() &&
17548 ISD::isNON_EXTLoad(Op0.getNode()) && Op0.hasOneUse() &&
17549 !XTLI->getSubtarget()->is64Bit() &&
17550 !DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
17551 SDValue FILDChain = XTLI->BuildFILD(SDValue(N, 0), Ld->getValueType(0),
17552 Ld->getChain(), Op0, DAG);
17553 DAG.ReplaceAllUsesOfValueWith(Op0.getValue(1), FILDChain.getValue(1));
17560 // Optimize RES, EFLAGS = X86ISD::ADC LHS, RHS, EFLAGS
17561 static SDValue PerformADCCombine(SDNode *N, SelectionDAG &DAG,
17562 X86TargetLowering::DAGCombinerInfo &DCI) {
17563 // If the LHS and RHS of the ADC node are zero, then it can't overflow and
17564 // the result is either zero or one (depending on the input carry bit).
17565 // Strength reduce this down to a "set on carry" aka SETCC_CARRY&1.
17566 if (X86::isZeroNode(N->getOperand(0)) &&
17567 X86::isZeroNode(N->getOperand(1)) &&
17568 // We don't have a good way to replace an EFLAGS use, so only do this when
17570 SDValue(N, 1).use_empty()) {
17571 DebugLoc DL = N->getDebugLoc();
17572 EVT VT = N->getValueType(0);
17573 SDValue CarryOut = DAG.getConstant(0, N->getValueType(1));
17574 SDValue Res1 = DAG.getNode(ISD::AND, DL, VT,
17575 DAG.getNode(X86ISD::SETCC_CARRY, DL, VT,
17576 DAG.getConstant(X86::COND_B,MVT::i8),
17578 DAG.getConstant(1, VT));
17579 return DCI.CombineTo(N, Res1, CarryOut);
17585 // fold (add Y, (sete X, 0)) -> adc 0, Y
17586 // (add Y, (setne X, 0)) -> sbb -1, Y
17587 // (sub (sete X, 0), Y) -> sbb 0, Y
17588 // (sub (setne X, 0), Y) -> adc -1, Y
17589 static SDValue OptimizeConditionalInDecrement(SDNode *N, SelectionDAG &DAG) {
17590 DebugLoc DL = N->getDebugLoc();
17592 // Look through ZExts.
17593 SDValue Ext = N->getOperand(N->getOpcode() == ISD::SUB ? 1 : 0);
17594 if (Ext.getOpcode() != ISD::ZERO_EXTEND || !Ext.hasOneUse())
17597 SDValue SetCC = Ext.getOperand(0);
17598 if (SetCC.getOpcode() != X86ISD::SETCC || !SetCC.hasOneUse())
17601 X86::CondCode CC = (X86::CondCode)SetCC.getConstantOperandVal(0);
17602 if (CC != X86::COND_E && CC != X86::COND_NE)
17605 SDValue Cmp = SetCC.getOperand(1);
17606 if (Cmp.getOpcode() != X86ISD::CMP || !Cmp.hasOneUse() ||
17607 !X86::isZeroNode(Cmp.getOperand(1)) ||
17608 !Cmp.getOperand(0).getValueType().isInteger())
17611 SDValue CmpOp0 = Cmp.getOperand(0);
17612 SDValue NewCmp = DAG.getNode(X86ISD::CMP, DL, MVT::i32, CmpOp0,
17613 DAG.getConstant(1, CmpOp0.getValueType()));
17615 SDValue OtherVal = N->getOperand(N->getOpcode() == ISD::SUB ? 0 : 1);
17616 if (CC == X86::COND_NE)
17617 return DAG.getNode(N->getOpcode() == ISD::SUB ? X86ISD::ADC : X86ISD::SBB,
17618 DL, OtherVal.getValueType(), OtherVal,
17619 DAG.getConstant(-1ULL, OtherVal.getValueType()), NewCmp);
17620 return DAG.getNode(N->getOpcode() == ISD::SUB ? X86ISD::SBB : X86ISD::ADC,
17621 DL, OtherVal.getValueType(), OtherVal,
17622 DAG.getConstant(0, OtherVal.getValueType()), NewCmp);
17625 /// PerformADDCombine - Do target-specific dag combines on integer adds.
17626 static SDValue PerformAddCombine(SDNode *N, SelectionDAG &DAG,
17627 const X86Subtarget *Subtarget) {
17628 EVT VT = N->getValueType(0);
17629 SDValue Op0 = N->getOperand(0);
17630 SDValue Op1 = N->getOperand(1);
17632 // Try to synthesize horizontal adds from adds of shuffles.
17633 if (((Subtarget->hasSSSE3() && (VT == MVT::v8i16 || VT == MVT::v4i32)) ||
17634 (Subtarget->hasInt256() && (VT == MVT::v16i16 || VT == MVT::v8i32))) &&
17635 isHorizontalBinOp(Op0, Op1, true))
17636 return DAG.getNode(X86ISD::HADD, N->getDebugLoc(), VT, Op0, Op1);
17638 return OptimizeConditionalInDecrement(N, DAG);
17641 static SDValue PerformSubCombine(SDNode *N, SelectionDAG &DAG,
17642 const X86Subtarget *Subtarget) {
17643 SDValue Op0 = N->getOperand(0);
17644 SDValue Op1 = N->getOperand(1);
17646 // X86 can't encode an immediate LHS of a sub. See if we can push the
17647 // negation into a preceding instruction.
17648 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op0)) {
17649 // If the RHS of the sub is a XOR with one use and a constant, invert the
17650 // immediate. Then add one to the LHS of the sub so we can turn
17651 // X-Y -> X+~Y+1, saving one register.
17652 if (Op1->hasOneUse() && Op1.getOpcode() == ISD::XOR &&
17653 isa<ConstantSDNode>(Op1.getOperand(1))) {
17654 APInt XorC = cast<ConstantSDNode>(Op1.getOperand(1))->getAPIntValue();
17655 EVT VT = Op0.getValueType();
17656 SDValue NewXor = DAG.getNode(ISD::XOR, Op1.getDebugLoc(), VT,
17658 DAG.getConstant(~XorC, VT));
17659 return DAG.getNode(ISD::ADD, N->getDebugLoc(), VT, NewXor,
17660 DAG.getConstant(C->getAPIntValue()+1, VT));
17664 // Try to synthesize horizontal adds from adds of shuffles.
17665 EVT VT = N->getValueType(0);
17666 if (((Subtarget->hasSSSE3() && (VT == MVT::v8i16 || VT == MVT::v4i32)) ||
17667 (Subtarget->hasInt256() && (VT == MVT::v16i16 || VT == MVT::v8i32))) &&
17668 isHorizontalBinOp(Op0, Op1, true))
17669 return DAG.getNode(X86ISD::HSUB, N->getDebugLoc(), VT, Op0, Op1);
17671 return OptimizeConditionalInDecrement(N, DAG);
17674 /// performVZEXTCombine - Performs build vector combines
17675 static SDValue performVZEXTCombine(SDNode *N, SelectionDAG &DAG,
17676 TargetLowering::DAGCombinerInfo &DCI,
17677 const X86Subtarget *Subtarget) {
17678 // (vzext (bitcast (vzext (x)) -> (vzext x)
17679 SDValue In = N->getOperand(0);
17680 while (In.getOpcode() == ISD::BITCAST)
17681 In = In.getOperand(0);
17683 if (In.getOpcode() != X86ISD::VZEXT)
17686 return DAG.getNode(X86ISD::VZEXT, N->getDebugLoc(), N->getValueType(0),
17690 SDValue X86TargetLowering::PerformDAGCombine(SDNode *N,
17691 DAGCombinerInfo &DCI) const {
17692 SelectionDAG &DAG = DCI.DAG;
17693 switch (N->getOpcode()) {
17695 case ISD::EXTRACT_VECTOR_ELT:
17696 return PerformEXTRACT_VECTOR_ELTCombine(N, DAG, DCI);
17698 case ISD::SELECT: return PerformSELECTCombine(N, DAG, DCI, Subtarget);
17699 case X86ISD::CMOV: return PerformCMOVCombine(N, DAG, DCI, Subtarget);
17700 case ISD::ADD: return PerformAddCombine(N, DAG, Subtarget);
17701 case ISD::SUB: return PerformSubCombine(N, DAG, Subtarget);
17702 case X86ISD::ADC: return PerformADCCombine(N, DAG, DCI);
17703 case ISD::MUL: return PerformMulCombine(N, DAG, DCI);
17706 case ISD::SRL: return PerformShiftCombine(N, DAG, DCI, Subtarget);
17707 case ISD::AND: return PerformAndCombine(N, DAG, DCI, Subtarget);
17708 case ISD::OR: return PerformOrCombine(N, DAG, DCI, Subtarget);
17709 case ISD::XOR: return PerformXorCombine(N, DAG, DCI, Subtarget);
17710 case ISD::LOAD: return PerformLOADCombine(N, DAG, DCI, Subtarget);
17711 case ISD::STORE: return PerformSTORECombine(N, DAG, Subtarget);
17712 case ISD::SINT_TO_FP: return PerformSINT_TO_FPCombine(N, DAG, this);
17713 case ISD::FADD: return PerformFADDCombine(N, DAG, Subtarget);
17714 case ISD::FSUB: return PerformFSUBCombine(N, DAG, Subtarget);
17716 case X86ISD::FOR: return PerformFORCombine(N, DAG);
17718 case X86ISD::FMAX: return PerformFMinFMaxCombine(N, DAG);
17719 case X86ISD::FAND: return PerformFANDCombine(N, DAG);
17720 case X86ISD::BT: return PerformBTCombine(N, DAG, DCI);
17721 case X86ISD::VZEXT_MOVL: return PerformVZEXT_MOVLCombine(N, DAG);
17722 case ISD::ANY_EXTEND:
17723 case ISD::ZERO_EXTEND: return PerformZExtCombine(N, DAG, DCI, Subtarget);
17724 case ISD::SIGN_EXTEND: return PerformSExtCombine(N, DAG, DCI, Subtarget);
17725 case ISD::SIGN_EXTEND_INREG: return PerformSIGN_EXTEND_INREGCombine(N, DAG, Subtarget);
17726 case ISD::TRUNCATE: return PerformTruncateCombine(N, DAG,DCI,Subtarget);
17727 case ISD::SETCC: return PerformISDSETCCCombine(N, DAG);
17728 case X86ISD::SETCC: return PerformSETCCCombine(N, DAG, DCI, Subtarget);
17729 case X86ISD::BRCOND: return PerformBrCondCombine(N, DAG, DCI, Subtarget);
17730 case X86ISD::VZEXT: return performVZEXTCombine(N, DAG, DCI, Subtarget);
17731 case X86ISD::SHUFP: // Handle all target specific shuffles
17732 case X86ISD::PALIGNR:
17733 case X86ISD::UNPCKH:
17734 case X86ISD::UNPCKL:
17735 case X86ISD::MOVHLPS:
17736 case X86ISD::MOVLHPS:
17737 case X86ISD::PSHUFD:
17738 case X86ISD::PSHUFHW:
17739 case X86ISD::PSHUFLW:
17740 case X86ISD::MOVSS:
17741 case X86ISD::MOVSD:
17742 case X86ISD::VPERMILP:
17743 case X86ISD::VPERM2X128:
17744 case ISD::VECTOR_SHUFFLE: return PerformShuffleCombine(N, DAG, DCI,Subtarget);
17745 case ISD::FMA: return PerformFMACombine(N, DAG, Subtarget);
17751 /// isTypeDesirableForOp - Return true if the target has native support for
17752 /// the specified value type and it is 'desirable' to use the type for the
17753 /// given node type. e.g. On x86 i16 is legal, but undesirable since i16
17754 /// instruction encodings are longer and some i16 instructions are slow.
17755 bool X86TargetLowering::isTypeDesirableForOp(unsigned Opc, EVT VT) const {
17756 if (!isTypeLegal(VT))
17758 if (VT != MVT::i16)
17765 case ISD::SIGN_EXTEND:
17766 case ISD::ZERO_EXTEND:
17767 case ISD::ANY_EXTEND:
17780 /// IsDesirableToPromoteOp - This method query the target whether it is
17781 /// beneficial for dag combiner to promote the specified node. If true, it
17782 /// should return the desired promotion type by reference.
17783 bool X86TargetLowering::IsDesirableToPromoteOp(SDValue Op, EVT &PVT) const {
17784 EVT VT = Op.getValueType();
17785 if (VT != MVT::i16)
17788 bool Promote = false;
17789 bool Commute = false;
17790 switch (Op.getOpcode()) {
17793 LoadSDNode *LD = cast<LoadSDNode>(Op);
17794 // If the non-extending load has a single use and it's not live out, then it
17795 // might be folded.
17796 if (LD->getExtensionType() == ISD::NON_EXTLOAD /*&&
17797 Op.hasOneUse()*/) {
17798 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
17799 UE = Op.getNode()->use_end(); UI != UE; ++UI) {
17800 // The only case where we'd want to promote LOAD (rather then it being
17801 // promoted as an operand is when it's only use is liveout.
17802 if (UI->getOpcode() != ISD::CopyToReg)
17809 case ISD::SIGN_EXTEND:
17810 case ISD::ZERO_EXTEND:
17811 case ISD::ANY_EXTEND:
17816 SDValue N0 = Op.getOperand(0);
17817 // Look out for (store (shl (load), x)).
17818 if (MayFoldLoad(N0) && MayFoldIntoStore(Op))
17831 SDValue N0 = Op.getOperand(0);
17832 SDValue N1 = Op.getOperand(1);
17833 if (!Commute && MayFoldLoad(N1))
17835 // Avoid disabling potential load folding opportunities.
17836 if (MayFoldLoad(N0) && (!isa<ConstantSDNode>(N1) || MayFoldIntoStore(Op)))
17838 if (MayFoldLoad(N1) && (!isa<ConstantSDNode>(N0) || MayFoldIntoStore(Op)))
17848 //===----------------------------------------------------------------------===//
17849 // X86 Inline Assembly Support
17850 //===----------------------------------------------------------------------===//
17853 // Helper to match a string separated by whitespace.
17854 bool matchAsmImpl(StringRef s, ArrayRef<const StringRef *> args) {
17855 s = s.substr(s.find_first_not_of(" \t")); // Skip leading whitespace.
17857 for (unsigned i = 0, e = args.size(); i != e; ++i) {
17858 StringRef piece(*args[i]);
17859 if (!s.startswith(piece)) // Check if the piece matches.
17862 s = s.substr(piece.size());
17863 StringRef::size_type pos = s.find_first_not_of(" \t");
17864 if (pos == 0) // We matched a prefix.
17872 const VariadicFunction1<bool, StringRef, StringRef, matchAsmImpl> matchAsm={};
17875 bool X86TargetLowering::ExpandInlineAsm(CallInst *CI) const {
17876 InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
17878 std::string AsmStr = IA->getAsmString();
17880 IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
17881 if (!Ty || Ty->getBitWidth() % 16 != 0)
17884 // TODO: should remove alternatives from the asmstring: "foo {a|b}" -> "foo a"
17885 SmallVector<StringRef, 4> AsmPieces;
17886 SplitString(AsmStr, AsmPieces, ";\n");
17888 switch (AsmPieces.size()) {
17889 default: return false;
17891 // FIXME: this should verify that we are targeting a 486 or better. If not,
17892 // we will turn this bswap into something that will be lowered to logical
17893 // ops instead of emitting the bswap asm. For now, we don't support 486 or
17894 // lower so don't worry about this.
17896 if (matchAsm(AsmPieces[0], "bswap", "$0") ||
17897 matchAsm(AsmPieces[0], "bswapl", "$0") ||
17898 matchAsm(AsmPieces[0], "bswapq", "$0") ||
17899 matchAsm(AsmPieces[0], "bswap", "${0:q}") ||
17900 matchAsm(AsmPieces[0], "bswapl", "${0:q}") ||
17901 matchAsm(AsmPieces[0], "bswapq", "${0:q}")) {
17902 // No need to check constraints, nothing other than the equivalent of
17903 // "=r,0" would be valid here.
17904 return IntrinsicLowering::LowerToByteSwap(CI);
17907 // rorw $$8, ${0:w} --> llvm.bswap.i16
17908 if (CI->getType()->isIntegerTy(16) &&
17909 IA->getConstraintString().compare(0, 5, "=r,0,") == 0 &&
17910 (matchAsm(AsmPieces[0], "rorw", "$$8,", "${0:w}") ||
17911 matchAsm(AsmPieces[0], "rolw", "$$8,", "${0:w}"))) {
17913 const std::string &ConstraintsStr = IA->getConstraintString();
17914 SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ",");
17915 array_pod_sort(AsmPieces.begin(), AsmPieces.end());
17916 if (AsmPieces.size() == 4 &&
17917 AsmPieces[0] == "~{cc}" &&
17918 AsmPieces[1] == "~{dirflag}" &&
17919 AsmPieces[2] == "~{flags}" &&
17920 AsmPieces[3] == "~{fpsr}")
17921 return IntrinsicLowering::LowerToByteSwap(CI);
17925 if (CI->getType()->isIntegerTy(32) &&
17926 IA->getConstraintString().compare(0, 5, "=r,0,") == 0 &&
17927 matchAsm(AsmPieces[0], "rorw", "$$8,", "${0:w}") &&
17928 matchAsm(AsmPieces[1], "rorl", "$$16,", "$0") &&
17929 matchAsm(AsmPieces[2], "rorw", "$$8,", "${0:w}")) {
17931 const std::string &ConstraintsStr = IA->getConstraintString();
17932 SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ",");
17933 array_pod_sort(AsmPieces.begin(), AsmPieces.end());
17934 if (AsmPieces.size() == 4 &&
17935 AsmPieces[0] == "~{cc}" &&
17936 AsmPieces[1] == "~{dirflag}" &&
17937 AsmPieces[2] == "~{flags}" &&
17938 AsmPieces[3] == "~{fpsr}")
17939 return IntrinsicLowering::LowerToByteSwap(CI);
17942 if (CI->getType()->isIntegerTy(64)) {
17943 InlineAsm::ConstraintInfoVector Constraints = IA->ParseConstraints();
17944 if (Constraints.size() >= 2 &&
17945 Constraints[0].Codes.size() == 1 && Constraints[0].Codes[0] == "A" &&
17946 Constraints[1].Codes.size() == 1 && Constraints[1].Codes[0] == "0") {
17947 // bswap %eax / bswap %edx / xchgl %eax, %edx -> llvm.bswap.i64
17948 if (matchAsm(AsmPieces[0], "bswap", "%eax") &&
17949 matchAsm(AsmPieces[1], "bswap", "%edx") &&
17950 matchAsm(AsmPieces[2], "xchgl", "%eax,", "%edx"))
17951 return IntrinsicLowering::LowerToByteSwap(CI);
17959 /// getConstraintType - Given a constraint letter, return the type of
17960 /// constraint it is for this target.
17961 X86TargetLowering::ConstraintType
17962 X86TargetLowering::getConstraintType(const std::string &Constraint) const {
17963 if (Constraint.size() == 1) {
17964 switch (Constraint[0]) {
17975 return C_RegisterClass;
17999 return TargetLowering::getConstraintType(Constraint);
18002 /// Examine constraint type and operand type and determine a weight value.
18003 /// This object must already have been set up with the operand type
18004 /// and the current alternative constraint selected.
18005 TargetLowering::ConstraintWeight
18006 X86TargetLowering::getSingleConstraintMatchWeight(
18007 AsmOperandInfo &info, const char *constraint) const {
18008 ConstraintWeight weight = CW_Invalid;
18009 Value *CallOperandVal = info.CallOperandVal;
18010 // If we don't have a value, we can't do a match,
18011 // but allow it at the lowest weight.
18012 if (CallOperandVal == NULL)
18014 Type *type = CallOperandVal->getType();
18015 // Look at the constraint type.
18016 switch (*constraint) {
18018 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
18029 if (CallOperandVal->getType()->isIntegerTy())
18030 weight = CW_SpecificReg;
18035 if (type->isFloatingPointTy())
18036 weight = CW_SpecificReg;
18039 if (type->isX86_MMXTy() && Subtarget->hasMMX())
18040 weight = CW_SpecificReg;
18044 if (((type->getPrimitiveSizeInBits() == 128) && Subtarget->hasSSE1()) ||
18045 ((type->getPrimitiveSizeInBits() == 256) && Subtarget->hasFp256()))
18046 weight = CW_Register;
18049 if (ConstantInt *C = dyn_cast<ConstantInt>(info.CallOperandVal)) {
18050 if (C->getZExtValue() <= 31)
18051 weight = CW_Constant;
18055 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
18056 if (C->getZExtValue() <= 63)
18057 weight = CW_Constant;
18061 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
18062 if ((C->getSExtValue() >= -0x80) && (C->getSExtValue() <= 0x7f))
18063 weight = CW_Constant;
18067 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
18068 if ((C->getZExtValue() == 0xff) || (C->getZExtValue() == 0xffff))
18069 weight = CW_Constant;
18073 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
18074 if (C->getZExtValue() <= 3)
18075 weight = CW_Constant;
18079 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
18080 if (C->getZExtValue() <= 0xff)
18081 weight = CW_Constant;
18086 if (dyn_cast<ConstantFP>(CallOperandVal)) {
18087 weight = CW_Constant;
18091 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
18092 if ((C->getSExtValue() >= -0x80000000LL) &&
18093 (C->getSExtValue() <= 0x7fffffffLL))
18094 weight = CW_Constant;
18098 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
18099 if (C->getZExtValue() <= 0xffffffff)
18100 weight = CW_Constant;
18107 /// LowerXConstraint - try to replace an X constraint, which matches anything,
18108 /// with another that has more specific requirements based on the type of the
18109 /// corresponding operand.
18110 const char *X86TargetLowering::
18111 LowerXConstraint(EVT ConstraintVT) const {
18112 // FP X constraints get lowered to SSE1/2 registers if available, otherwise
18113 // 'f' like normal targets.
18114 if (ConstraintVT.isFloatingPoint()) {
18115 if (Subtarget->hasSSE2())
18117 if (Subtarget->hasSSE1())
18121 return TargetLowering::LowerXConstraint(ConstraintVT);
18124 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
18125 /// vector. If it is invalid, don't add anything to Ops.
18126 void X86TargetLowering::LowerAsmOperandForConstraint(SDValue Op,
18127 std::string &Constraint,
18128 std::vector<SDValue>&Ops,
18129 SelectionDAG &DAG) const {
18130 SDValue Result(0, 0);
18132 // Only support length 1 constraints for now.
18133 if (Constraint.length() > 1) return;
18135 char ConstraintLetter = Constraint[0];
18136 switch (ConstraintLetter) {
18139 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
18140 if (C->getZExtValue() <= 31) {
18141 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
18147 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
18148 if (C->getZExtValue() <= 63) {
18149 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
18155 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
18156 if (isInt<8>(C->getSExtValue())) {
18157 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
18163 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
18164 if (C->getZExtValue() <= 255) {
18165 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
18171 // 32-bit signed value
18172 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
18173 if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()),
18174 C->getSExtValue())) {
18175 // Widen to 64 bits here to get it sign extended.
18176 Result = DAG.getTargetConstant(C->getSExtValue(), MVT::i64);
18179 // FIXME gcc accepts some relocatable values here too, but only in certain
18180 // memory models; it's complicated.
18185 // 32-bit unsigned value
18186 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
18187 if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()),
18188 C->getZExtValue())) {
18189 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
18193 // FIXME gcc accepts some relocatable values here too, but only in certain
18194 // memory models; it's complicated.
18198 // Literal immediates are always ok.
18199 if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(Op)) {
18200 // Widen to 64 bits here to get it sign extended.
18201 Result = DAG.getTargetConstant(CST->getSExtValue(), MVT::i64);
18205 // In any sort of PIC mode addresses need to be computed at runtime by
18206 // adding in a register or some sort of table lookup. These can't
18207 // be used as immediates.
18208 if (Subtarget->isPICStyleGOT() || Subtarget->isPICStyleStubPIC())
18211 // If we are in non-pic codegen mode, we allow the address of a global (with
18212 // an optional displacement) to be used with 'i'.
18213 GlobalAddressSDNode *GA = 0;
18214 int64_t Offset = 0;
18216 // Match either (GA), (GA+C), (GA+C1+C2), etc.
18218 if ((GA = dyn_cast<GlobalAddressSDNode>(Op))) {
18219 Offset += GA->getOffset();
18221 } else if (Op.getOpcode() == ISD::ADD) {
18222 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
18223 Offset += C->getZExtValue();
18224 Op = Op.getOperand(0);
18227 } else if (Op.getOpcode() == ISD::SUB) {
18228 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
18229 Offset += -C->getZExtValue();
18230 Op = Op.getOperand(0);
18235 // Otherwise, this isn't something we can handle, reject it.
18239 const GlobalValue *GV = GA->getGlobal();
18240 // If we require an extra load to get this address, as in PIC mode, we
18241 // can't accept it.
18242 if (isGlobalStubReference(Subtarget->ClassifyGlobalReference(GV,
18243 getTargetMachine())))
18246 Result = DAG.getTargetGlobalAddress(GV, Op.getDebugLoc(),
18247 GA->getValueType(0), Offset);
18252 if (Result.getNode()) {
18253 Ops.push_back(Result);
18256 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
18259 std::pair<unsigned, const TargetRegisterClass*>
18260 X86TargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
18262 // First, see if this is a constraint that directly corresponds to an LLVM
18264 if (Constraint.size() == 1) {
18265 // GCC Constraint Letters
18266 switch (Constraint[0]) {
18268 // TODO: Slight differences here in allocation order and leaving
18269 // RIP in the class. Do they matter any more here than they do
18270 // in the normal allocation?
18271 case 'q': // GENERAL_REGS in 64-bit mode, Q_REGS in 32-bit mode.
18272 if (Subtarget->is64Bit()) {
18273 if (VT == MVT::i32 || VT == MVT::f32)
18274 return std::make_pair(0U, &X86::GR32RegClass);
18275 if (VT == MVT::i16)
18276 return std::make_pair(0U, &X86::GR16RegClass);
18277 if (VT == MVT::i8 || VT == MVT::i1)
18278 return std::make_pair(0U, &X86::GR8RegClass);
18279 if (VT == MVT::i64 || VT == MVT::f64)
18280 return std::make_pair(0U, &X86::GR64RegClass);
18283 // 32-bit fallthrough
18284 case 'Q': // Q_REGS
18285 if (VT == MVT::i32 || VT == MVT::f32)
18286 return std::make_pair(0U, &X86::GR32_ABCDRegClass);
18287 if (VT == MVT::i16)
18288 return std::make_pair(0U, &X86::GR16_ABCDRegClass);
18289 if (VT == MVT::i8 || VT == MVT::i1)
18290 return std::make_pair(0U, &X86::GR8_ABCD_LRegClass);
18291 if (VT == MVT::i64)
18292 return std::make_pair(0U, &X86::GR64_ABCDRegClass);
18294 case 'r': // GENERAL_REGS
18295 case 'l': // INDEX_REGS
18296 if (VT == MVT::i8 || VT == MVT::i1)
18297 return std::make_pair(0U, &X86::GR8RegClass);
18298 if (VT == MVT::i16)
18299 return std::make_pair(0U, &X86::GR16RegClass);
18300 if (VT == MVT::i32 || VT == MVT::f32 || !Subtarget->is64Bit())
18301 return std::make_pair(0U, &X86::GR32RegClass);
18302 return std::make_pair(0U, &X86::GR64RegClass);
18303 case 'R': // LEGACY_REGS
18304 if (VT == MVT::i8 || VT == MVT::i1)
18305 return std::make_pair(0U, &X86::GR8_NOREXRegClass);
18306 if (VT == MVT::i16)
18307 return std::make_pair(0U, &X86::GR16_NOREXRegClass);
18308 if (VT == MVT::i32 || !Subtarget->is64Bit())
18309 return std::make_pair(0U, &X86::GR32_NOREXRegClass);
18310 return std::make_pair(0U, &X86::GR64_NOREXRegClass);
18311 case 'f': // FP Stack registers.
18312 // If SSE is enabled for this VT, use f80 to ensure the isel moves the
18313 // value to the correct fpstack register class.
18314 if (VT == MVT::f32 && !isScalarFPTypeInSSEReg(VT))
18315 return std::make_pair(0U, &X86::RFP32RegClass);
18316 if (VT == MVT::f64 && !isScalarFPTypeInSSEReg(VT))
18317 return std::make_pair(0U, &X86::RFP64RegClass);
18318 return std::make_pair(0U, &X86::RFP80RegClass);
18319 case 'y': // MMX_REGS if MMX allowed.
18320 if (!Subtarget->hasMMX()) break;
18321 return std::make_pair(0U, &X86::VR64RegClass);
18322 case 'Y': // SSE_REGS if SSE2 allowed
18323 if (!Subtarget->hasSSE2()) break;
18325 case 'x': // SSE_REGS if SSE1 allowed or AVX_REGS if AVX allowed
18326 if (!Subtarget->hasSSE1()) break;
18328 switch (VT.getSimpleVT().SimpleTy) {
18330 // Scalar SSE types.
18333 return std::make_pair(0U, &X86::FR32RegClass);
18336 return std::make_pair(0U, &X86::FR64RegClass);
18344 return std::make_pair(0U, &X86::VR128RegClass);
18352 return std::make_pair(0U, &X86::VR256RegClass);
18358 // Use the default implementation in TargetLowering to convert the register
18359 // constraint into a member of a register class.
18360 std::pair<unsigned, const TargetRegisterClass*> Res;
18361 Res = TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
18363 // Not found as a standard register?
18364 if (Res.second == 0) {
18365 // Map st(0) -> st(7) -> ST0
18366 if (Constraint.size() == 7 && Constraint[0] == '{' &&
18367 tolower(Constraint[1]) == 's' &&
18368 tolower(Constraint[2]) == 't' &&
18369 Constraint[3] == '(' &&
18370 (Constraint[4] >= '0' && Constraint[4] <= '7') &&
18371 Constraint[5] == ')' &&
18372 Constraint[6] == '}') {
18374 Res.first = X86::ST0+Constraint[4]-'0';
18375 Res.second = &X86::RFP80RegClass;
18379 // GCC allows "st(0)" to be called just plain "st".
18380 if (StringRef("{st}").equals_lower(Constraint)) {
18381 Res.first = X86::ST0;
18382 Res.second = &X86::RFP80RegClass;
18387 if (StringRef("{flags}").equals_lower(Constraint)) {
18388 Res.first = X86::EFLAGS;
18389 Res.second = &X86::CCRRegClass;
18393 // 'A' means EAX + EDX.
18394 if (Constraint == "A") {
18395 Res.first = X86::EAX;
18396 Res.second = &X86::GR32_ADRegClass;
18402 // Otherwise, check to see if this is a register class of the wrong value
18403 // type. For example, we want to map "{ax},i32" -> {eax}, we don't want it to
18404 // turn into {ax},{dx}.
18405 if (Res.second->hasType(VT))
18406 return Res; // Correct type already, nothing to do.
18408 // All of the single-register GCC register classes map their values onto
18409 // 16-bit register pieces "ax","dx","cx","bx","si","di","bp","sp". If we
18410 // really want an 8-bit or 32-bit register, map to the appropriate register
18411 // class and return the appropriate register.
18412 if (Res.second == &X86::GR16RegClass) {
18413 if (VT == MVT::i8 || VT == MVT::i1) {
18414 unsigned DestReg = 0;
18415 switch (Res.first) {
18417 case X86::AX: DestReg = X86::AL; break;
18418 case X86::DX: DestReg = X86::DL; break;
18419 case X86::CX: DestReg = X86::CL; break;
18420 case X86::BX: DestReg = X86::BL; break;
18423 Res.first = DestReg;
18424 Res.second = &X86::GR8RegClass;
18426 } else if (VT == MVT::i32 || VT == MVT::f32) {
18427 unsigned DestReg = 0;
18428 switch (Res.first) {
18430 case X86::AX: DestReg = X86::EAX; break;
18431 case X86::DX: DestReg = X86::EDX; break;
18432 case X86::CX: DestReg = X86::ECX; break;
18433 case X86::BX: DestReg = X86::EBX; break;
18434 case X86::SI: DestReg = X86::ESI; break;
18435 case X86::DI: DestReg = X86::EDI; break;
18436 case X86::BP: DestReg = X86::EBP; break;
18437 case X86::SP: DestReg = X86::ESP; break;
18440 Res.first = DestReg;
18441 Res.second = &X86::GR32RegClass;
18443 } else if (VT == MVT::i64 || VT == MVT::f64) {
18444 unsigned DestReg = 0;
18445 switch (Res.first) {
18447 case X86::AX: DestReg = X86::RAX; break;
18448 case X86::DX: DestReg = X86::RDX; break;
18449 case X86::CX: DestReg = X86::RCX; break;
18450 case X86::BX: DestReg = X86::RBX; break;
18451 case X86::SI: DestReg = X86::RSI; break;
18452 case X86::DI: DestReg = X86::RDI; break;
18453 case X86::BP: DestReg = X86::RBP; break;
18454 case X86::SP: DestReg = X86::RSP; break;
18457 Res.first = DestReg;
18458 Res.second = &X86::GR64RegClass;
18461 } else if (Res.second == &X86::FR32RegClass ||
18462 Res.second == &X86::FR64RegClass ||
18463 Res.second == &X86::VR128RegClass) {
18464 // Handle references to XMM physical registers that got mapped into the
18465 // wrong class. This can happen with constraints like {xmm0} where the
18466 // target independent register mapper will just pick the first match it can
18467 // find, ignoring the required type.
18469 if (VT == MVT::f32 || VT == MVT::i32)
18470 Res.second = &X86::FR32RegClass;
18471 else if (VT == MVT::f64 || VT == MVT::i64)
18472 Res.second = &X86::FR64RegClass;
18473 else if (X86::VR128RegClass.hasType(VT))
18474 Res.second = &X86::VR128RegClass;
18475 else if (X86::VR256RegClass.hasType(VT))
18476 Res.second = &X86::VR256RegClass;