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"
17 #include "X86InstrBuilder.h"
18 #include "X86ISelLowering.h"
19 #include "X86TargetMachine.h"
20 #include "X86TargetObjectFile.h"
21 #include "Utils/X86ShuffleDecode.h"
22 #include "llvm/CallingConv.h"
23 #include "llvm/Constants.h"
24 #include "llvm/DerivedTypes.h"
25 #include "llvm/GlobalAlias.h"
26 #include "llvm/GlobalVariable.h"
27 #include "llvm/Function.h"
28 #include "llvm/Instructions.h"
29 #include "llvm/Intrinsics.h"
30 #include "llvm/LLVMContext.h"
31 #include "llvm/CodeGen/IntrinsicLowering.h"
32 #include "llvm/CodeGen/MachineFrameInfo.h"
33 #include "llvm/CodeGen/MachineFunction.h"
34 #include "llvm/CodeGen/MachineInstrBuilder.h"
35 #include "llvm/CodeGen/MachineJumpTableInfo.h"
36 #include "llvm/CodeGen/MachineModuleInfo.h"
37 #include "llvm/CodeGen/MachineRegisterInfo.h"
38 #include "llvm/CodeGen/PseudoSourceValue.h"
39 #include "llvm/MC/MCAsmInfo.h"
40 #include "llvm/MC/MCContext.h"
41 #include "llvm/MC/MCExpr.h"
42 #include "llvm/MC/MCSymbol.h"
43 #include "llvm/ADT/BitVector.h"
44 #include "llvm/ADT/SmallSet.h"
45 #include "llvm/ADT/Statistic.h"
46 #include "llvm/ADT/StringExtras.h"
47 #include "llvm/ADT/VectorExtras.h"
48 #include "llvm/Support/CallSite.h"
49 #include "llvm/Support/Debug.h"
50 #include "llvm/Support/Dwarf.h"
51 #include "llvm/Support/ErrorHandling.h"
52 #include "llvm/Support/MathExtras.h"
53 #include "llvm/Support/raw_ostream.h"
55 using namespace dwarf;
57 STATISTIC(NumTailCalls, "Number of tail calls");
59 // Forward declarations.
60 static SDValue getMOVL(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
63 static SDValue Insert128BitVector(SDValue Result,
69 static SDValue Extract128BitVector(SDValue Vec,
74 static SDValue ConcatVectors(SDValue Lower, SDValue Upper, SelectionDAG &DAG);
77 /// Generate a DAG to grab 128-bits from a vector > 128 bits. This
78 /// sets things up to match to an AVX VEXTRACTF128 instruction or a
79 /// simple subregister reference. Idx is an index in the 128 bits we
80 /// want. It need not be aligned to a 128-bit bounday. That makes
81 /// lowering EXTRACT_VECTOR_ELT operations easier.
82 static SDValue Extract128BitVector(SDValue Vec,
86 EVT VT = Vec.getValueType();
87 assert(VT.getSizeInBits() == 256 && "Unexpected vector size!");
89 EVT ElVT = VT.getVectorElementType();
91 int Factor = VT.getSizeInBits() / 128;
93 EVT ResultVT = EVT::getVectorVT(*DAG.getContext(),
95 VT.getVectorNumElements() / Factor);
97 // Extract from UNDEF is UNDEF.
98 if (Vec.getOpcode() == ISD::UNDEF)
99 return DAG.getNode(ISD::UNDEF, dl, ResultVT);
101 if (isa<ConstantSDNode>(Idx)) {
102 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
104 // Extract the relevant 128 bits. Generate an EXTRACT_SUBVECTOR
105 // we can match to VEXTRACTF128.
106 unsigned ElemsPerChunk = 128 / ElVT.getSizeInBits();
108 // This is the index of the first element of the 128-bit chunk
110 unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits()) / 128)
113 SDValue VecIdx = DAG.getConstant(NormalizedIdxVal, MVT::i32);
115 SDValue Result = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, ResultVT, Vec,
124 /// Generate a DAG to put 128-bits into a vector > 128 bits. This
125 /// sets things up to match to an AVX VINSERTF128 instruction or a
126 /// simple superregister reference. Idx is an index in the 128 bits
127 /// we want. It need not be aligned to a 128-bit bounday. That makes
128 /// lowering INSERT_VECTOR_ELT operations easier.
129 static SDValue Insert128BitVector(SDValue Result,
134 if (isa<ConstantSDNode>(Idx)) {
135 EVT VT = Vec.getValueType();
136 assert(VT.getSizeInBits() == 128 && "Unexpected vector size!");
138 EVT ElVT = VT.getVectorElementType();
140 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
142 EVT ResultVT = Result.getValueType();
144 // Insert the relevant 128 bits.
145 unsigned ElemsPerChunk = 128 / ElVT.getSizeInBits();
147 // This is the index of the first element of the 128-bit chunk
149 unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits()) / 128)
152 SDValue VecIdx = DAG.getConstant(NormalizedIdxVal, MVT::i32);
154 Result = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, ResultVT, Result, Vec,
162 /// Given two vectors, concat them.
163 static SDValue ConcatVectors(SDValue Lower, SDValue Upper, SelectionDAG &DAG) {
164 DebugLoc dl = Lower.getDebugLoc();
166 assert(Lower.getValueType() == Upper.getValueType() && "Mismatched vectors!");
168 EVT VT = EVT::getVectorVT(*DAG.getContext(),
169 Lower.getValueType().getVectorElementType(),
170 Lower.getValueType().getVectorNumElements() * 2);
172 // TODO: Generalize to arbitrary vector length (this assumes 256-bit vectors).
173 assert(VT.getSizeInBits() == 256 && "Unsupported vector concat!");
175 // Insert the upper subvector.
176 SDValue Vec = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, VT), Upper,
178 // This is half the length of the result
179 // vector. Start inserting the upper 128
181 Lower.getValueType().getVectorNumElements(),
185 // Insert the lower subvector.
186 Vec = Insert128BitVector(Vec, Lower, DAG.getConstant(0, MVT::i32), DAG, dl);
190 static TargetLoweringObjectFile *createTLOF(X86TargetMachine &TM) {
191 const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
192 bool is64Bit = Subtarget->is64Bit();
194 if (Subtarget->isTargetEnvMacho()) {
196 return new X8664_MachoTargetObjectFile();
197 return new TargetLoweringObjectFileMachO();
200 if (Subtarget->isTargetELF()) {
202 return new X8664_ELFTargetObjectFile(TM);
203 return new X8632_ELFTargetObjectFile(TM);
205 if (Subtarget->isTargetCOFF() && !Subtarget->isTargetEnvMacho())
206 return new TargetLoweringObjectFileCOFF();
207 llvm_unreachable("unknown subtarget type");
210 X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
211 : TargetLowering(TM, createTLOF(TM)) {
212 Subtarget = &TM.getSubtarget<X86Subtarget>();
213 X86ScalarSSEf64 = Subtarget->hasXMMInt();
214 X86ScalarSSEf32 = Subtarget->hasXMM();
215 X86StackPtr = Subtarget->is64Bit() ? X86::RSP : X86::ESP;
217 RegInfo = TM.getRegisterInfo();
218 TD = getTargetData();
220 // Set up the TargetLowering object.
221 static MVT IntVTs[] = { MVT::i8, MVT::i16, MVT::i32, MVT::i64 };
223 // X86 is weird, it always uses i8 for shift amounts and setcc results.
224 setBooleanContents(ZeroOrOneBooleanContent);
226 // For 64-bit since we have so many registers use the ILP scheduler, for
227 // 32-bit code use the register pressure specific scheduling.
228 if (Subtarget->is64Bit())
229 setSchedulingPreference(Sched::ILP);
231 setSchedulingPreference(Sched::RegPressure);
232 setStackPointerRegisterToSaveRestore(X86StackPtr);
234 if (Subtarget->isTargetWindows() && !Subtarget->isTargetCygMing()) {
235 // Setup Windows compiler runtime calls.
236 setLibcallName(RTLIB::SDIV_I64, "_alldiv");
237 setLibcallName(RTLIB::UDIV_I64, "_aulldiv");
238 setLibcallName(RTLIB::FPTOUINT_F64_I64, "_ftol2");
239 setLibcallName(RTLIB::FPTOUINT_F32_I64, "_ftol2");
240 setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::X86_StdCall);
241 setLibcallCallingConv(RTLIB::UDIV_I64, CallingConv::X86_StdCall);
242 setLibcallCallingConv(RTLIB::FPTOUINT_F64_I64, CallingConv::C);
243 setLibcallCallingConv(RTLIB::FPTOUINT_F32_I64, CallingConv::C);
246 if (Subtarget->isTargetDarwin()) {
247 // Darwin should use _setjmp/_longjmp instead of setjmp/longjmp.
248 setUseUnderscoreSetJmp(false);
249 setUseUnderscoreLongJmp(false);
250 } else if (Subtarget->isTargetMingw()) {
251 // MS runtime is weird: it exports _setjmp, but longjmp!
252 setUseUnderscoreSetJmp(true);
253 setUseUnderscoreLongJmp(false);
255 setUseUnderscoreSetJmp(true);
256 setUseUnderscoreLongJmp(true);
259 // Set up the register classes.
260 addRegisterClass(MVT::i8, X86::GR8RegisterClass);
261 addRegisterClass(MVT::i16, X86::GR16RegisterClass);
262 addRegisterClass(MVT::i32, X86::GR32RegisterClass);
263 if (Subtarget->is64Bit())
264 addRegisterClass(MVT::i64, X86::GR64RegisterClass);
266 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
268 // We don't accept any truncstore of integer registers.
269 setTruncStoreAction(MVT::i64, MVT::i32, Expand);
270 setTruncStoreAction(MVT::i64, MVT::i16, Expand);
271 setTruncStoreAction(MVT::i64, MVT::i8 , Expand);
272 setTruncStoreAction(MVT::i32, MVT::i16, Expand);
273 setTruncStoreAction(MVT::i32, MVT::i8 , Expand);
274 setTruncStoreAction(MVT::i16, MVT::i8, Expand);
276 // SETOEQ and SETUNE require checking two conditions.
277 setCondCodeAction(ISD::SETOEQ, MVT::f32, Expand);
278 setCondCodeAction(ISD::SETOEQ, MVT::f64, Expand);
279 setCondCodeAction(ISD::SETOEQ, MVT::f80, Expand);
280 setCondCodeAction(ISD::SETUNE, MVT::f32, Expand);
281 setCondCodeAction(ISD::SETUNE, MVT::f64, Expand);
282 setCondCodeAction(ISD::SETUNE, MVT::f80, Expand);
284 // Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this
286 setOperationAction(ISD::UINT_TO_FP , MVT::i1 , Promote);
287 setOperationAction(ISD::UINT_TO_FP , MVT::i8 , Promote);
288 setOperationAction(ISD::UINT_TO_FP , MVT::i16 , Promote);
290 if (Subtarget->is64Bit()) {
291 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Promote);
292 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Expand);
293 } else if (!UseSoftFloat) {
294 // We have an algorithm for SSE2->double, and we turn this into a
295 // 64-bit FILD followed by conditional FADD for other targets.
296 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Custom);
297 // We have an algorithm for SSE2, and we turn this into a 64-bit
298 // FILD for other targets.
299 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Custom);
302 // Promote i1/i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have
304 setOperationAction(ISD::SINT_TO_FP , MVT::i1 , Promote);
305 setOperationAction(ISD::SINT_TO_FP , MVT::i8 , Promote);
308 // SSE has no i16 to fp conversion, only i32
309 if (X86ScalarSSEf32) {
310 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
311 // f32 and f64 cases are Legal, f80 case is not
312 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
314 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Custom);
315 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
318 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
319 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Promote);
322 // In 32-bit mode these are custom lowered. In 64-bit mode F32 and F64
323 // are Legal, f80 is custom lowered.
324 setOperationAction(ISD::FP_TO_SINT , MVT::i64 , Custom);
325 setOperationAction(ISD::SINT_TO_FP , MVT::i64 , Custom);
327 // Promote i1/i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have
329 setOperationAction(ISD::FP_TO_SINT , MVT::i1 , Promote);
330 setOperationAction(ISD::FP_TO_SINT , MVT::i8 , Promote);
332 if (X86ScalarSSEf32) {
333 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Promote);
334 // f32 and f64 cases are Legal, f80 case is not
335 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
337 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Custom);
338 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
341 // Handle FP_TO_UINT by promoting the destination to a larger signed
343 setOperationAction(ISD::FP_TO_UINT , MVT::i1 , Promote);
344 setOperationAction(ISD::FP_TO_UINT , MVT::i8 , Promote);
345 setOperationAction(ISD::FP_TO_UINT , MVT::i16 , Promote);
347 if (Subtarget->is64Bit()) {
348 setOperationAction(ISD::FP_TO_UINT , MVT::i64 , Expand);
349 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
350 } else if (!UseSoftFloat) {
351 if (X86ScalarSSEf32 && !Subtarget->hasSSE3())
352 // Expand FP_TO_UINT into a select.
353 // FIXME: We would like to use a Custom expander here eventually to do
354 // the optimal thing for SSE vs. the default expansion in the legalizer.
355 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Expand);
357 // With SSE3 we can use fisttpll to convert to a signed i64; without
358 // SSE, we're stuck with a fistpll.
359 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Custom);
362 // TODO: when we have SSE, these could be more efficient, by using movd/movq.
363 if (!X86ScalarSSEf64) {
364 setOperationAction(ISD::BITCAST , MVT::f32 , Expand);
365 setOperationAction(ISD::BITCAST , MVT::i32 , Expand);
366 if (Subtarget->is64Bit()) {
367 setOperationAction(ISD::BITCAST , MVT::f64 , Expand);
368 // Without SSE, i64->f64 goes through memory.
369 setOperationAction(ISD::BITCAST , MVT::i64 , Expand);
373 // Scalar integer divide and remainder are lowered to use operations that
374 // produce two results, to match the available instructions. This exposes
375 // the two-result form to trivial CSE, which is able to combine x/y and x%y
376 // into a single instruction.
378 // Scalar integer multiply-high is also lowered to use two-result
379 // operations, to match the available instructions. However, plain multiply
380 // (low) operations are left as Legal, as there are single-result
381 // instructions for this in x86. Using the two-result multiply instructions
382 // when both high and low results are needed must be arranged by dagcombine.
383 for (unsigned i = 0, e = 4; i != e; ++i) {
385 setOperationAction(ISD::MULHS, VT, Expand);
386 setOperationAction(ISD::MULHU, VT, Expand);
387 setOperationAction(ISD::SDIV, VT, Expand);
388 setOperationAction(ISD::UDIV, VT, Expand);
389 setOperationAction(ISD::SREM, VT, Expand);
390 setOperationAction(ISD::UREM, VT, Expand);
392 // Add/Sub overflow ops with MVT::Glues are lowered to EFLAGS dependences.
393 setOperationAction(ISD::ADDC, VT, Custom);
394 setOperationAction(ISD::ADDE, VT, Custom);
395 setOperationAction(ISD::SUBC, VT, Custom);
396 setOperationAction(ISD::SUBE, VT, Custom);
399 setOperationAction(ISD::BR_JT , MVT::Other, Expand);
400 setOperationAction(ISD::BRCOND , MVT::Other, Custom);
401 setOperationAction(ISD::BR_CC , MVT::Other, Expand);
402 setOperationAction(ISD::SELECT_CC , MVT::Other, Expand);
403 if (Subtarget->is64Bit())
404 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i32, Legal);
405 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16 , Legal);
406 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Legal);
407 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
408 setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
409 setOperationAction(ISD::FREM , MVT::f32 , Expand);
410 setOperationAction(ISD::FREM , MVT::f64 , Expand);
411 setOperationAction(ISD::FREM , MVT::f80 , Expand);
412 setOperationAction(ISD::FLT_ROUNDS_ , MVT::i32 , Custom);
414 setOperationAction(ISD::CTTZ , MVT::i8 , Custom);
415 setOperationAction(ISD::CTLZ , MVT::i8 , Custom);
416 setOperationAction(ISD::CTTZ , MVT::i16 , Custom);
417 setOperationAction(ISD::CTLZ , MVT::i16 , Custom);
418 setOperationAction(ISD::CTTZ , MVT::i32 , Custom);
419 setOperationAction(ISD::CTLZ , MVT::i32 , Custom);
420 if (Subtarget->is64Bit()) {
421 setOperationAction(ISD::CTTZ , MVT::i64 , Custom);
422 setOperationAction(ISD::CTLZ , MVT::i64 , Custom);
425 if (Subtarget->hasPOPCNT()) {
426 setOperationAction(ISD::CTPOP , MVT::i8 , Promote);
428 setOperationAction(ISD::CTPOP , MVT::i8 , Expand);
429 setOperationAction(ISD::CTPOP , MVT::i16 , Expand);
430 setOperationAction(ISD::CTPOP , MVT::i32 , Expand);
431 if (Subtarget->is64Bit())
432 setOperationAction(ISD::CTPOP , MVT::i64 , Expand);
435 setOperationAction(ISD::READCYCLECOUNTER , MVT::i64 , Custom);
436 setOperationAction(ISD::BSWAP , MVT::i16 , Expand);
438 // These should be promoted to a larger select which is supported.
439 setOperationAction(ISD::SELECT , MVT::i1 , Promote);
440 // X86 wants to expand cmov itself.
441 setOperationAction(ISD::SELECT , MVT::i8 , Custom);
442 setOperationAction(ISD::SELECT , MVT::i16 , Custom);
443 setOperationAction(ISD::SELECT , MVT::i32 , Custom);
444 setOperationAction(ISD::SELECT , MVT::f32 , Custom);
445 setOperationAction(ISD::SELECT , MVT::f64 , Custom);
446 setOperationAction(ISD::SELECT , MVT::f80 , Custom);
447 setOperationAction(ISD::SETCC , MVT::i8 , Custom);
448 setOperationAction(ISD::SETCC , MVT::i16 , Custom);
449 setOperationAction(ISD::SETCC , MVT::i32 , Custom);
450 setOperationAction(ISD::SETCC , MVT::f32 , Custom);
451 setOperationAction(ISD::SETCC , MVT::f64 , Custom);
452 setOperationAction(ISD::SETCC , MVT::f80 , Custom);
453 if (Subtarget->is64Bit()) {
454 setOperationAction(ISD::SELECT , MVT::i64 , Custom);
455 setOperationAction(ISD::SETCC , MVT::i64 , Custom);
457 setOperationAction(ISD::EH_RETURN , MVT::Other, Custom);
460 setOperationAction(ISD::ConstantPool , MVT::i32 , Custom);
461 setOperationAction(ISD::JumpTable , MVT::i32 , Custom);
462 setOperationAction(ISD::GlobalAddress , MVT::i32 , Custom);
463 setOperationAction(ISD::GlobalTLSAddress, MVT::i32 , Custom);
464 if (Subtarget->is64Bit())
465 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
466 setOperationAction(ISD::ExternalSymbol , MVT::i32 , Custom);
467 setOperationAction(ISD::BlockAddress , MVT::i32 , Custom);
468 if (Subtarget->is64Bit()) {
469 setOperationAction(ISD::ConstantPool , MVT::i64 , Custom);
470 setOperationAction(ISD::JumpTable , MVT::i64 , Custom);
471 setOperationAction(ISD::GlobalAddress , MVT::i64 , Custom);
472 setOperationAction(ISD::ExternalSymbol, MVT::i64 , Custom);
473 setOperationAction(ISD::BlockAddress , MVT::i64 , Custom);
475 // 64-bit addm sub, shl, sra, srl (iff 32-bit x86)
476 setOperationAction(ISD::SHL_PARTS , MVT::i32 , Custom);
477 setOperationAction(ISD::SRA_PARTS , MVT::i32 , Custom);
478 setOperationAction(ISD::SRL_PARTS , MVT::i32 , Custom);
479 if (Subtarget->is64Bit()) {
480 setOperationAction(ISD::SHL_PARTS , MVT::i64 , Custom);
481 setOperationAction(ISD::SRA_PARTS , MVT::i64 , Custom);
482 setOperationAction(ISD::SRL_PARTS , MVT::i64 , Custom);
485 if (Subtarget->hasXMM())
486 setOperationAction(ISD::PREFETCH , MVT::Other, Legal);
488 // We may not have a libcall for MEMBARRIER so we should lower this.
489 setOperationAction(ISD::MEMBARRIER , MVT::Other, Custom);
491 // On X86 and X86-64, atomic operations are lowered to locked instructions.
492 // Locked instructions, in turn, have implicit fence semantics (all memory
493 // operations are flushed before issuing the locked instruction, and they
494 // are not buffered), so we can fold away the common pattern of
495 // fence-atomic-fence.
496 setShouldFoldAtomicFences(true);
498 // Expand certain atomics
499 for (unsigned i = 0, e = 4; i != e; ++i) {
501 setOperationAction(ISD::ATOMIC_CMP_SWAP, VT, Custom);
502 setOperationAction(ISD::ATOMIC_LOAD_SUB, VT, Custom);
505 if (!Subtarget->is64Bit()) {
506 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i64, Custom);
507 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i64, Custom);
508 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i64, Custom);
509 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i64, Custom);
510 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i64, Custom);
511 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i64, Custom);
512 setOperationAction(ISD::ATOMIC_SWAP, MVT::i64, Custom);
515 // FIXME - use subtarget debug flags
516 if (!Subtarget->isTargetDarwin() &&
517 !Subtarget->isTargetELF() &&
518 !Subtarget->isTargetCygMing()) {
519 setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
522 setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
523 setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
524 setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
525 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
526 if (Subtarget->is64Bit()) {
527 setExceptionPointerRegister(X86::RAX);
528 setExceptionSelectorRegister(X86::RDX);
530 setExceptionPointerRegister(X86::EAX);
531 setExceptionSelectorRegister(X86::EDX);
533 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i32, Custom);
534 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i64, Custom);
536 setOperationAction(ISD::TRAMPOLINE, MVT::Other, Custom);
538 setOperationAction(ISD::TRAP, MVT::Other, Legal);
540 // VASTART needs to be custom lowered to use the VarArgsFrameIndex
541 setOperationAction(ISD::VASTART , MVT::Other, Custom);
542 setOperationAction(ISD::VAEND , MVT::Other, Expand);
543 if (Subtarget->is64Bit()) {
544 setOperationAction(ISD::VAARG , MVT::Other, Custom);
545 setOperationAction(ISD::VACOPY , MVT::Other, Custom);
547 setOperationAction(ISD::VAARG , MVT::Other, Expand);
548 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
551 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
552 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
553 setOperationAction(ISD::DYNAMIC_STACKALLOC,
554 (Subtarget->is64Bit() ? MVT::i64 : MVT::i32),
555 (Subtarget->isTargetCOFF()
556 && !Subtarget->isTargetEnvMacho()
559 if (!UseSoftFloat && X86ScalarSSEf64) {
560 // f32 and f64 use SSE.
561 // Set up the FP register classes.
562 addRegisterClass(MVT::f32, X86::FR32RegisterClass);
563 addRegisterClass(MVT::f64, X86::FR64RegisterClass);
565 // Use ANDPD to simulate FABS.
566 setOperationAction(ISD::FABS , MVT::f64, Custom);
567 setOperationAction(ISD::FABS , MVT::f32, Custom);
569 // Use XORP to simulate FNEG.
570 setOperationAction(ISD::FNEG , MVT::f64, Custom);
571 setOperationAction(ISD::FNEG , MVT::f32, Custom);
573 // Use ANDPD and ORPD to simulate FCOPYSIGN.
574 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
575 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
577 // We don't support sin/cos/fmod
578 setOperationAction(ISD::FSIN , MVT::f64, Expand);
579 setOperationAction(ISD::FCOS , MVT::f64, Expand);
580 setOperationAction(ISD::FSIN , MVT::f32, Expand);
581 setOperationAction(ISD::FCOS , MVT::f32, Expand);
583 // Expand FP immediates into loads from the stack, except for the special
585 addLegalFPImmediate(APFloat(+0.0)); // xorpd
586 addLegalFPImmediate(APFloat(+0.0f)); // xorps
587 } else if (!UseSoftFloat && X86ScalarSSEf32) {
588 // Use SSE for f32, x87 for f64.
589 // Set up the FP register classes.
590 addRegisterClass(MVT::f32, X86::FR32RegisterClass);
591 addRegisterClass(MVT::f64, X86::RFP64RegisterClass);
593 // Use ANDPS to simulate FABS.
594 setOperationAction(ISD::FABS , MVT::f32, Custom);
596 // Use XORP to simulate FNEG.
597 setOperationAction(ISD::FNEG , MVT::f32, Custom);
599 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
601 // Use ANDPS and ORPS to simulate FCOPYSIGN.
602 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
603 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
605 // We don't support sin/cos/fmod
606 setOperationAction(ISD::FSIN , MVT::f32, Expand);
607 setOperationAction(ISD::FCOS , MVT::f32, Expand);
609 // Special cases we handle for FP constants.
610 addLegalFPImmediate(APFloat(+0.0f)); // xorps
611 addLegalFPImmediate(APFloat(+0.0)); // FLD0
612 addLegalFPImmediate(APFloat(+1.0)); // FLD1
613 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
614 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
617 setOperationAction(ISD::FSIN , MVT::f64 , Expand);
618 setOperationAction(ISD::FCOS , MVT::f64 , Expand);
620 } else if (!UseSoftFloat) {
621 // f32 and f64 in x87.
622 // Set up the FP register classes.
623 addRegisterClass(MVT::f64, X86::RFP64RegisterClass);
624 addRegisterClass(MVT::f32, X86::RFP32RegisterClass);
626 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
627 setOperationAction(ISD::UNDEF, MVT::f32, Expand);
628 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
629 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
632 setOperationAction(ISD::FSIN , MVT::f64 , Expand);
633 setOperationAction(ISD::FCOS , MVT::f64 , Expand);
635 addLegalFPImmediate(APFloat(+0.0)); // FLD0
636 addLegalFPImmediate(APFloat(+1.0)); // FLD1
637 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
638 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
639 addLegalFPImmediate(APFloat(+0.0f)); // FLD0
640 addLegalFPImmediate(APFloat(+1.0f)); // FLD1
641 addLegalFPImmediate(APFloat(-0.0f)); // FLD0/FCHS
642 addLegalFPImmediate(APFloat(-1.0f)); // FLD1/FCHS
645 // Long double always uses X87.
647 addRegisterClass(MVT::f80, X86::RFP80RegisterClass);
648 setOperationAction(ISD::UNDEF, MVT::f80, Expand);
649 setOperationAction(ISD::FCOPYSIGN, MVT::f80, Expand);
651 APFloat TmpFlt = APFloat::getZero(APFloat::x87DoubleExtended);
652 addLegalFPImmediate(TmpFlt); // FLD0
654 addLegalFPImmediate(TmpFlt); // FLD0/FCHS
657 APFloat TmpFlt2(+1.0);
658 TmpFlt2.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven,
660 addLegalFPImmediate(TmpFlt2); // FLD1
661 TmpFlt2.changeSign();
662 addLegalFPImmediate(TmpFlt2); // FLD1/FCHS
666 setOperationAction(ISD::FSIN , MVT::f80 , Expand);
667 setOperationAction(ISD::FCOS , MVT::f80 , Expand);
671 // Always use a library call for pow.
672 setOperationAction(ISD::FPOW , MVT::f32 , Expand);
673 setOperationAction(ISD::FPOW , MVT::f64 , Expand);
674 setOperationAction(ISD::FPOW , MVT::f80 , Expand);
676 setOperationAction(ISD::FLOG, MVT::f80, Expand);
677 setOperationAction(ISD::FLOG2, MVT::f80, Expand);
678 setOperationAction(ISD::FLOG10, MVT::f80, Expand);
679 setOperationAction(ISD::FEXP, MVT::f80, Expand);
680 setOperationAction(ISD::FEXP2, MVT::f80, Expand);
682 // First set operation action for all vector types to either promote
683 // (for widening) or expand (for scalarization). Then we will selectively
684 // turn on ones that can be effectively codegen'd.
685 for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
686 VT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++VT) {
687 setOperationAction(ISD::ADD , (MVT::SimpleValueType)VT, Expand);
688 setOperationAction(ISD::SUB , (MVT::SimpleValueType)VT, Expand);
689 setOperationAction(ISD::FADD, (MVT::SimpleValueType)VT, Expand);
690 setOperationAction(ISD::FNEG, (MVT::SimpleValueType)VT, Expand);
691 setOperationAction(ISD::FSUB, (MVT::SimpleValueType)VT, Expand);
692 setOperationAction(ISD::MUL , (MVT::SimpleValueType)VT, Expand);
693 setOperationAction(ISD::FMUL, (MVT::SimpleValueType)VT, Expand);
694 setOperationAction(ISD::SDIV, (MVT::SimpleValueType)VT, Expand);
695 setOperationAction(ISD::UDIV, (MVT::SimpleValueType)VT, Expand);
696 setOperationAction(ISD::FDIV, (MVT::SimpleValueType)VT, Expand);
697 setOperationAction(ISD::SREM, (MVT::SimpleValueType)VT, Expand);
698 setOperationAction(ISD::UREM, (MVT::SimpleValueType)VT, Expand);
699 setOperationAction(ISD::LOAD, (MVT::SimpleValueType)VT, Expand);
700 setOperationAction(ISD::VECTOR_SHUFFLE, (MVT::SimpleValueType)VT, Expand);
701 setOperationAction(ISD::EXTRACT_VECTOR_ELT,(MVT::SimpleValueType)VT,Expand);
702 setOperationAction(ISD::INSERT_VECTOR_ELT,(MVT::SimpleValueType)VT, Expand);
703 setOperationAction(ISD::EXTRACT_SUBVECTOR,(MVT::SimpleValueType)VT,Expand);
704 setOperationAction(ISD::INSERT_SUBVECTOR,(MVT::SimpleValueType)VT,Expand);
705 setOperationAction(ISD::FABS, (MVT::SimpleValueType)VT, Expand);
706 setOperationAction(ISD::FSIN, (MVT::SimpleValueType)VT, Expand);
707 setOperationAction(ISD::FCOS, (MVT::SimpleValueType)VT, Expand);
708 setOperationAction(ISD::FREM, (MVT::SimpleValueType)VT, Expand);
709 setOperationAction(ISD::FPOWI, (MVT::SimpleValueType)VT, Expand);
710 setOperationAction(ISD::FSQRT, (MVT::SimpleValueType)VT, Expand);
711 setOperationAction(ISD::FCOPYSIGN, (MVT::SimpleValueType)VT, Expand);
712 setOperationAction(ISD::SMUL_LOHI, (MVT::SimpleValueType)VT, Expand);
713 setOperationAction(ISD::UMUL_LOHI, (MVT::SimpleValueType)VT, Expand);
714 setOperationAction(ISD::SDIVREM, (MVT::SimpleValueType)VT, Expand);
715 setOperationAction(ISD::UDIVREM, (MVT::SimpleValueType)VT, Expand);
716 setOperationAction(ISD::FPOW, (MVT::SimpleValueType)VT, Expand);
717 setOperationAction(ISD::CTPOP, (MVT::SimpleValueType)VT, Expand);
718 setOperationAction(ISD::CTTZ, (MVT::SimpleValueType)VT, Expand);
719 setOperationAction(ISD::CTLZ, (MVT::SimpleValueType)VT, Expand);
720 setOperationAction(ISD::SHL, (MVT::SimpleValueType)VT, Expand);
721 setOperationAction(ISD::SRA, (MVT::SimpleValueType)VT, Expand);
722 setOperationAction(ISD::SRL, (MVT::SimpleValueType)VT, Expand);
723 setOperationAction(ISD::ROTL, (MVT::SimpleValueType)VT, Expand);
724 setOperationAction(ISD::ROTR, (MVT::SimpleValueType)VT, Expand);
725 setOperationAction(ISD::BSWAP, (MVT::SimpleValueType)VT, Expand);
726 setOperationAction(ISD::VSETCC, (MVT::SimpleValueType)VT, Expand);
727 setOperationAction(ISD::FLOG, (MVT::SimpleValueType)VT, Expand);
728 setOperationAction(ISD::FLOG2, (MVT::SimpleValueType)VT, Expand);
729 setOperationAction(ISD::FLOG10, (MVT::SimpleValueType)VT, Expand);
730 setOperationAction(ISD::FEXP, (MVT::SimpleValueType)VT, Expand);
731 setOperationAction(ISD::FEXP2, (MVT::SimpleValueType)VT, Expand);
732 setOperationAction(ISD::FP_TO_UINT, (MVT::SimpleValueType)VT, Expand);
733 setOperationAction(ISD::FP_TO_SINT, (MVT::SimpleValueType)VT, Expand);
734 setOperationAction(ISD::UINT_TO_FP, (MVT::SimpleValueType)VT, Expand);
735 setOperationAction(ISD::SINT_TO_FP, (MVT::SimpleValueType)VT, Expand);
736 setOperationAction(ISD::SIGN_EXTEND_INREG, (MVT::SimpleValueType)VT,Expand);
737 setOperationAction(ISD::TRUNCATE, (MVT::SimpleValueType)VT, Expand);
738 setOperationAction(ISD::SIGN_EXTEND, (MVT::SimpleValueType)VT, Expand);
739 setOperationAction(ISD::ZERO_EXTEND, (MVT::SimpleValueType)VT, Expand);
740 setOperationAction(ISD::ANY_EXTEND, (MVT::SimpleValueType)VT, Expand);
741 for (unsigned InnerVT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
742 InnerVT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++InnerVT)
743 setTruncStoreAction((MVT::SimpleValueType)VT,
744 (MVT::SimpleValueType)InnerVT, Expand);
745 setLoadExtAction(ISD::SEXTLOAD, (MVT::SimpleValueType)VT, Expand);
746 setLoadExtAction(ISD::ZEXTLOAD, (MVT::SimpleValueType)VT, Expand);
747 setLoadExtAction(ISD::EXTLOAD, (MVT::SimpleValueType)VT, Expand);
750 // FIXME: In order to prevent SSE instructions being expanded to MMX ones
751 // with -msoft-float, disable use of MMX as well.
752 if (!UseSoftFloat && Subtarget->hasMMX()) {
753 addRegisterClass(MVT::x86mmx, X86::VR64RegisterClass);
754 // No operations on x86mmx supported, everything uses intrinsics.
757 // MMX-sized vectors (other than x86mmx) are expected to be expanded
758 // into smaller operations.
759 setOperationAction(ISD::MULHS, MVT::v8i8, Expand);
760 setOperationAction(ISD::MULHS, MVT::v4i16, Expand);
761 setOperationAction(ISD::MULHS, MVT::v2i32, Expand);
762 setOperationAction(ISD::MULHS, MVT::v1i64, Expand);
763 setOperationAction(ISD::AND, MVT::v8i8, Expand);
764 setOperationAction(ISD::AND, MVT::v4i16, Expand);
765 setOperationAction(ISD::AND, MVT::v2i32, Expand);
766 setOperationAction(ISD::AND, MVT::v1i64, Expand);
767 setOperationAction(ISD::OR, MVT::v8i8, Expand);
768 setOperationAction(ISD::OR, MVT::v4i16, Expand);
769 setOperationAction(ISD::OR, MVT::v2i32, Expand);
770 setOperationAction(ISD::OR, MVT::v1i64, Expand);
771 setOperationAction(ISD::XOR, MVT::v8i8, Expand);
772 setOperationAction(ISD::XOR, MVT::v4i16, Expand);
773 setOperationAction(ISD::XOR, MVT::v2i32, Expand);
774 setOperationAction(ISD::XOR, MVT::v1i64, Expand);
775 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i8, Expand);
776 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i16, Expand);
777 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v2i32, Expand);
778 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v1i64, Expand);
779 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v1i64, Expand);
780 setOperationAction(ISD::SELECT, MVT::v8i8, Expand);
781 setOperationAction(ISD::SELECT, MVT::v4i16, Expand);
782 setOperationAction(ISD::SELECT, MVT::v2i32, Expand);
783 setOperationAction(ISD::SELECT, MVT::v1i64, Expand);
784 setOperationAction(ISD::BITCAST, MVT::v8i8, Expand);
785 setOperationAction(ISD::BITCAST, MVT::v4i16, Expand);
786 setOperationAction(ISD::BITCAST, MVT::v2i32, Expand);
787 setOperationAction(ISD::BITCAST, MVT::v1i64, Expand);
789 if (!UseSoftFloat && Subtarget->hasXMM()) {
790 addRegisterClass(MVT::v4f32, X86::VR128RegisterClass);
792 setOperationAction(ISD::FADD, MVT::v4f32, Legal);
793 setOperationAction(ISD::FSUB, MVT::v4f32, Legal);
794 setOperationAction(ISD::FMUL, MVT::v4f32, Legal);
795 setOperationAction(ISD::FDIV, MVT::v4f32, Legal);
796 setOperationAction(ISD::FSQRT, MVT::v4f32, Legal);
797 setOperationAction(ISD::FNEG, MVT::v4f32, Custom);
798 setOperationAction(ISD::LOAD, MVT::v4f32, Legal);
799 setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
800 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4f32, Custom);
801 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
802 setOperationAction(ISD::SELECT, MVT::v4f32, Custom);
803 setOperationAction(ISD::VSETCC, MVT::v4f32, Custom);
806 if (!UseSoftFloat && Subtarget->hasXMMInt()) {
807 addRegisterClass(MVT::v2f64, X86::VR128RegisterClass);
809 // FIXME: Unfortunately -soft-float and -no-implicit-float means XMM
810 // registers cannot be used even for integer operations.
811 addRegisterClass(MVT::v16i8, X86::VR128RegisterClass);
812 addRegisterClass(MVT::v8i16, X86::VR128RegisterClass);
813 addRegisterClass(MVT::v4i32, X86::VR128RegisterClass);
814 addRegisterClass(MVT::v2i64, X86::VR128RegisterClass);
816 setOperationAction(ISD::ADD, MVT::v16i8, Legal);
817 setOperationAction(ISD::ADD, MVT::v8i16, Legal);
818 setOperationAction(ISD::ADD, MVT::v4i32, Legal);
819 setOperationAction(ISD::ADD, MVT::v2i64, Legal);
820 setOperationAction(ISD::MUL, MVT::v2i64, Custom);
821 setOperationAction(ISD::SUB, MVT::v16i8, Legal);
822 setOperationAction(ISD::SUB, MVT::v8i16, Legal);
823 setOperationAction(ISD::SUB, MVT::v4i32, Legal);
824 setOperationAction(ISD::SUB, MVT::v2i64, Legal);
825 setOperationAction(ISD::MUL, MVT::v8i16, Legal);
826 setOperationAction(ISD::FADD, MVT::v2f64, Legal);
827 setOperationAction(ISD::FSUB, MVT::v2f64, Legal);
828 setOperationAction(ISD::FMUL, MVT::v2f64, Legal);
829 setOperationAction(ISD::FDIV, MVT::v2f64, Legal);
830 setOperationAction(ISD::FSQRT, MVT::v2f64, Legal);
831 setOperationAction(ISD::FNEG, MVT::v2f64, Custom);
833 setOperationAction(ISD::VSETCC, MVT::v2f64, Custom);
834 setOperationAction(ISD::VSETCC, MVT::v16i8, Custom);
835 setOperationAction(ISD::VSETCC, MVT::v8i16, Custom);
836 setOperationAction(ISD::VSETCC, MVT::v4i32, Custom);
838 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16i8, Custom);
839 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i16, Custom);
840 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
841 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
842 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
844 setOperationAction(ISD::CONCAT_VECTORS, MVT::v2f64, Custom);
845 setOperationAction(ISD::CONCAT_VECTORS, MVT::v2i64, Custom);
846 setOperationAction(ISD::CONCAT_VECTORS, MVT::v16i8, Custom);
847 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i16, Custom);
848 setOperationAction(ISD::CONCAT_VECTORS, MVT::v4i32, Custom);
850 // Custom lower build_vector, vector_shuffle, and extract_vector_elt.
851 for (unsigned i = (unsigned)MVT::v16i8; i != (unsigned)MVT::v2i64; ++i) {
852 EVT VT = (MVT::SimpleValueType)i;
853 // Do not attempt to custom lower non-power-of-2 vectors
854 if (!isPowerOf2_32(VT.getVectorNumElements()))
856 // Do not attempt to custom lower non-128-bit vectors
857 if (!VT.is128BitVector())
859 setOperationAction(ISD::BUILD_VECTOR,
860 VT.getSimpleVT().SimpleTy, Custom);
861 setOperationAction(ISD::VECTOR_SHUFFLE,
862 VT.getSimpleVT().SimpleTy, Custom);
863 setOperationAction(ISD::EXTRACT_VECTOR_ELT,
864 VT.getSimpleVT().SimpleTy, Custom);
867 setOperationAction(ISD::BUILD_VECTOR, MVT::v2f64, Custom);
868 setOperationAction(ISD::BUILD_VECTOR, MVT::v2i64, Custom);
869 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Custom);
870 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Custom);
871 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2f64, Custom);
872 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Custom);
874 if (Subtarget->is64Bit()) {
875 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Custom);
876 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
879 // Promote v16i8, v8i16, v4i32 load, select, and, or, xor to v2i64.
880 for (unsigned i = (unsigned)MVT::v16i8; i != (unsigned)MVT::v2i64; i++) {
881 MVT::SimpleValueType SVT = (MVT::SimpleValueType)i;
884 // Do not attempt to promote non-128-bit vectors
885 if (!VT.is128BitVector())
888 setOperationAction(ISD::AND, SVT, Promote);
889 AddPromotedToType (ISD::AND, SVT, MVT::v2i64);
890 setOperationAction(ISD::OR, SVT, Promote);
891 AddPromotedToType (ISD::OR, SVT, MVT::v2i64);
892 setOperationAction(ISD::XOR, SVT, Promote);
893 AddPromotedToType (ISD::XOR, SVT, MVT::v2i64);
894 setOperationAction(ISD::LOAD, SVT, Promote);
895 AddPromotedToType (ISD::LOAD, SVT, MVT::v2i64);
896 setOperationAction(ISD::SELECT, SVT, Promote);
897 AddPromotedToType (ISD::SELECT, SVT, MVT::v2i64);
900 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
902 // Custom lower v2i64 and v2f64 selects.
903 setOperationAction(ISD::LOAD, MVT::v2f64, Legal);
904 setOperationAction(ISD::LOAD, MVT::v2i64, Legal);
905 setOperationAction(ISD::SELECT, MVT::v2f64, Custom);
906 setOperationAction(ISD::SELECT, MVT::v2i64, Custom);
908 setOperationAction(ISD::FP_TO_SINT, MVT::v4i32, Legal);
909 setOperationAction(ISD::SINT_TO_FP, MVT::v4i32, Legal);
912 if (Subtarget->hasSSE41()) {
913 setOperationAction(ISD::FFLOOR, MVT::f32, Legal);
914 setOperationAction(ISD::FCEIL, MVT::f32, Legal);
915 setOperationAction(ISD::FTRUNC, MVT::f32, Legal);
916 setOperationAction(ISD::FRINT, MVT::f32, Legal);
917 setOperationAction(ISD::FNEARBYINT, MVT::f32, Legal);
918 setOperationAction(ISD::FFLOOR, MVT::f64, Legal);
919 setOperationAction(ISD::FCEIL, MVT::f64, Legal);
920 setOperationAction(ISD::FTRUNC, MVT::f64, Legal);
921 setOperationAction(ISD::FRINT, MVT::f64, Legal);
922 setOperationAction(ISD::FNEARBYINT, MVT::f64, Legal);
924 // FIXME: Do we need to handle scalar-to-vector here?
925 setOperationAction(ISD::MUL, MVT::v4i32, Legal);
927 // Can turn SHL into an integer multiply.
928 setOperationAction(ISD::SHL, MVT::v4i32, Custom);
929 setOperationAction(ISD::SHL, MVT::v16i8, Custom);
930 setOperationAction(ISD::SRL, MVT::v4i32, Legal);
932 // i8 and i16 vectors are custom , because the source register and source
933 // source memory operand types are not the same width. f32 vectors are
934 // custom since the immediate controlling the insert encodes additional
936 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i8, Custom);
937 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
938 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
939 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
941 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v16i8, Custom);
942 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v8i16, Custom);
943 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4i32, Custom);
944 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
946 if (Subtarget->is64Bit()) {
947 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Legal);
948 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Legal);
952 if (Subtarget->hasSSE42())
953 setOperationAction(ISD::VSETCC, MVT::v2i64, Custom);
955 if (!UseSoftFloat && Subtarget->hasAVX()) {
956 addRegisterClass(MVT::v8f32, X86::VR256RegisterClass);
957 addRegisterClass(MVT::v4f64, X86::VR256RegisterClass);
958 addRegisterClass(MVT::v8i32, X86::VR256RegisterClass);
959 addRegisterClass(MVT::v4i64, X86::VR256RegisterClass);
960 addRegisterClass(MVT::v32i8, X86::VR256RegisterClass);
962 setOperationAction(ISD::LOAD, MVT::v8f32, Legal);
963 setOperationAction(ISD::LOAD, MVT::v8i32, Legal);
964 setOperationAction(ISD::LOAD, MVT::v4f64, Legal);
965 setOperationAction(ISD::LOAD, MVT::v4i64, Legal);
967 setOperationAction(ISD::FADD, MVT::v8f32, Legal);
968 setOperationAction(ISD::FSUB, MVT::v8f32, Legal);
969 setOperationAction(ISD::FMUL, MVT::v8f32, Legal);
970 setOperationAction(ISD::FDIV, MVT::v8f32, Legal);
971 setOperationAction(ISD::FSQRT, MVT::v8f32, Legal);
972 setOperationAction(ISD::FNEG, MVT::v8f32, Custom);
974 setOperationAction(ISD::FADD, MVT::v4f64, Legal);
975 setOperationAction(ISD::FSUB, MVT::v4f64, Legal);
976 setOperationAction(ISD::FMUL, MVT::v4f64, Legal);
977 setOperationAction(ISD::FDIV, MVT::v4f64, Legal);
978 setOperationAction(ISD::FSQRT, MVT::v4f64, Legal);
979 setOperationAction(ISD::FNEG, MVT::v4f64, Custom);
981 // Custom lower build_vector, vector_shuffle, scalar_to_vector,
982 // insert_vector_elt extract_subvector and extract_vector_elt for
984 for (unsigned i = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
985 i <= (unsigned)MVT::LAST_VECTOR_VALUETYPE;
987 MVT::SimpleValueType VT = (MVT::SimpleValueType)i;
988 // Do not attempt to custom lower non-256-bit vectors
989 if (!isPowerOf2_32(MVT(VT).getVectorNumElements())
990 || (MVT(VT).getSizeInBits() < 256))
992 setOperationAction(ISD::BUILD_VECTOR, VT, Custom);
993 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom);
994 setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom);
995 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom);
996 setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Custom);
998 // Custom-lower insert_subvector and extract_subvector based on
1000 for (unsigned i = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
1001 i <= (unsigned)MVT::LAST_VECTOR_VALUETYPE;
1003 MVT::SimpleValueType VT = (MVT::SimpleValueType)i;
1004 // Do not attempt to custom lower non-256-bit vectors
1005 if (!isPowerOf2_32(MVT(VT).getVectorNumElements()))
1008 if (MVT(VT).getSizeInBits() == 128) {
1009 setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Custom);
1011 else if (MVT(VT).getSizeInBits() == 256) {
1012 setOperationAction(ISD::INSERT_SUBVECTOR, VT, Custom);
1016 // Promote v32i8, v16i16, v8i32 select, and, or, xor to v4i64.
1017 // Don't promote loads because we need them for VPERM vector index versions.
1019 for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
1020 VT != (unsigned)MVT::LAST_VECTOR_VALUETYPE;
1022 if (!isPowerOf2_32(MVT((MVT::SimpleValueType)VT).getVectorNumElements())
1023 || (MVT((MVT::SimpleValueType)VT).getSizeInBits() < 256))
1025 setOperationAction(ISD::AND, (MVT::SimpleValueType)VT, Promote);
1026 AddPromotedToType (ISD::AND, (MVT::SimpleValueType)VT, MVT::v4i64);
1027 setOperationAction(ISD::OR, (MVT::SimpleValueType)VT, Promote);
1028 AddPromotedToType (ISD::OR, (MVT::SimpleValueType)VT, MVT::v4i64);
1029 setOperationAction(ISD::XOR, (MVT::SimpleValueType)VT, Promote);
1030 AddPromotedToType (ISD::XOR, (MVT::SimpleValueType)VT, MVT::v4i64);
1031 //setOperationAction(ISD::LOAD, (MVT::SimpleValueType)VT, Promote);
1032 //AddPromotedToType (ISD::LOAD, (MVT::SimpleValueType)VT, MVT::v4i64);
1033 setOperationAction(ISD::SELECT, (MVT::SimpleValueType)VT, Promote);
1034 AddPromotedToType (ISD::SELECT, (MVT::SimpleValueType)VT, MVT::v4i64);
1038 // We want to custom lower some of our intrinsics.
1039 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
1042 // Only custom-lower 64-bit SADDO and friends on 64-bit because we don't
1043 // handle type legalization for these operations here.
1045 // FIXME: We really should do custom legalization for addition and
1046 // subtraction on x86-32 once PR3203 is fixed. We really can't do much better
1047 // than generic legalization for 64-bit multiplication-with-overflow, though.
1048 for (unsigned i = 0, e = 3+Subtarget->is64Bit(); i != e; ++i) {
1049 // Add/Sub/Mul with overflow operations are custom lowered.
1051 setOperationAction(ISD::SADDO, VT, Custom);
1052 setOperationAction(ISD::UADDO, VT, Custom);
1053 setOperationAction(ISD::SSUBO, VT, Custom);
1054 setOperationAction(ISD::USUBO, VT, Custom);
1055 setOperationAction(ISD::SMULO, VT, Custom);
1056 setOperationAction(ISD::UMULO, VT, Custom);
1059 // There are no 8-bit 3-address imul/mul instructions
1060 setOperationAction(ISD::SMULO, MVT::i8, Expand);
1061 setOperationAction(ISD::UMULO, MVT::i8, Expand);
1063 if (!Subtarget->is64Bit()) {
1064 // These libcalls are not available in 32-bit.
1065 setLibcallName(RTLIB::SHL_I128, 0);
1066 setLibcallName(RTLIB::SRL_I128, 0);
1067 setLibcallName(RTLIB::SRA_I128, 0);
1070 // We have target-specific dag combine patterns for the following nodes:
1071 setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
1072 setTargetDAGCombine(ISD::EXTRACT_VECTOR_ELT);
1073 setTargetDAGCombine(ISD::BUILD_VECTOR);
1074 setTargetDAGCombine(ISD::SELECT);
1075 setTargetDAGCombine(ISD::SHL);
1076 setTargetDAGCombine(ISD::SRA);
1077 setTargetDAGCombine(ISD::SRL);
1078 setTargetDAGCombine(ISD::OR);
1079 setTargetDAGCombine(ISD::AND);
1080 setTargetDAGCombine(ISD::ADD);
1081 setTargetDAGCombine(ISD::SUB);
1082 setTargetDAGCombine(ISD::STORE);
1083 setTargetDAGCombine(ISD::ZERO_EXTEND);
1084 if (Subtarget->is64Bit())
1085 setTargetDAGCombine(ISD::MUL);
1087 computeRegisterProperties();
1089 // On Darwin, -Os means optimize for size without hurting performance,
1090 // do not reduce the limit.
1091 maxStoresPerMemset = 16; // For @llvm.memset -> sequence of stores
1092 maxStoresPerMemsetOptSize = Subtarget->isTargetDarwin() ? 16 : 8;
1093 maxStoresPerMemcpy = 8; // For @llvm.memcpy -> sequence of stores
1094 maxStoresPerMemcpyOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
1095 maxStoresPerMemmove = 8; // For @llvm.memmove -> sequence of stores
1096 maxStoresPerMemmoveOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
1097 setPrefLoopAlignment(16);
1098 benefitFromCodePlacementOpt = true;
1102 MVT::SimpleValueType X86TargetLowering::getSetCCResultType(EVT VT) const {
1107 /// getMaxByValAlign - Helper for getByValTypeAlignment to determine
1108 /// the desired ByVal argument alignment.
1109 static void getMaxByValAlign(const Type *Ty, unsigned &MaxAlign) {
1112 if (const VectorType *VTy = dyn_cast<VectorType>(Ty)) {
1113 if (VTy->getBitWidth() == 128)
1115 } else if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
1116 unsigned EltAlign = 0;
1117 getMaxByValAlign(ATy->getElementType(), EltAlign);
1118 if (EltAlign > MaxAlign)
1119 MaxAlign = EltAlign;
1120 } else if (const StructType *STy = dyn_cast<StructType>(Ty)) {
1121 for (unsigned i = 0, e = STy->getNumElements(); i != e; ++i) {
1122 unsigned EltAlign = 0;
1123 getMaxByValAlign(STy->getElementType(i), EltAlign);
1124 if (EltAlign > MaxAlign)
1125 MaxAlign = EltAlign;
1133 /// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
1134 /// function arguments in the caller parameter area. For X86, aggregates
1135 /// that contain SSE vectors are placed at 16-byte boundaries while the rest
1136 /// are at 4-byte boundaries.
1137 unsigned X86TargetLowering::getByValTypeAlignment(const Type *Ty) const {
1138 if (Subtarget->is64Bit()) {
1139 // Max of 8 and alignment of type.
1140 unsigned TyAlign = TD->getABITypeAlignment(Ty);
1147 if (Subtarget->hasXMM())
1148 getMaxByValAlign(Ty, Align);
1152 /// getOptimalMemOpType - Returns the target specific optimal type for load
1153 /// and store operations as a result of memset, memcpy, and memmove
1154 /// lowering. If DstAlign is zero that means it's safe to destination
1155 /// alignment can satisfy any constraint. Similarly if SrcAlign is zero it
1156 /// means there isn't a need to check it against alignment requirement,
1157 /// probably because the source does not need to be loaded. If
1158 /// 'NonScalarIntSafe' is true, that means it's safe to return a
1159 /// non-scalar-integer type, e.g. empty string source, constant, or loaded
1160 /// from memory. 'MemcpyStrSrc' indicates whether the memcpy source is
1161 /// constant so it does not need to be loaded.
1162 /// It returns EVT::Other if the type should be determined using generic
1163 /// target-independent logic.
1165 X86TargetLowering::getOptimalMemOpType(uint64_t Size,
1166 unsigned DstAlign, unsigned SrcAlign,
1167 bool NonScalarIntSafe,
1169 MachineFunction &MF) const {
1170 // FIXME: This turns off use of xmm stores for memset/memcpy on targets like
1171 // linux. This is because the stack realignment code can't handle certain
1172 // cases like PR2962. This should be removed when PR2962 is fixed.
1173 const Function *F = MF.getFunction();
1174 if (NonScalarIntSafe &&
1175 !F->hasFnAttr(Attribute::NoImplicitFloat)) {
1177 (Subtarget->isUnalignedMemAccessFast() ||
1178 ((DstAlign == 0 || DstAlign >= 16) &&
1179 (SrcAlign == 0 || SrcAlign >= 16))) &&
1180 Subtarget->getStackAlignment() >= 16) {
1181 if (Subtarget->hasSSE2())
1183 if (Subtarget->hasSSE1())
1185 } else if (!MemcpyStrSrc && Size >= 8 &&
1186 !Subtarget->is64Bit() &&
1187 Subtarget->getStackAlignment() >= 8 &&
1188 Subtarget->hasXMMInt()) {
1189 // Do not use f64 to lower memcpy if source is string constant. It's
1190 // better to use i32 to avoid the loads.
1194 if (Subtarget->is64Bit() && Size >= 8)
1199 /// getJumpTableEncoding - Return the entry encoding for a jump table in the
1200 /// current function. The returned value is a member of the
1201 /// MachineJumpTableInfo::JTEntryKind enum.
1202 unsigned X86TargetLowering::getJumpTableEncoding() const {
1203 // In GOT pic mode, each entry in the jump table is emitted as a @GOTOFF
1205 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1206 Subtarget->isPICStyleGOT())
1207 return MachineJumpTableInfo::EK_Custom32;
1209 // Otherwise, use the normal jump table encoding heuristics.
1210 return TargetLowering::getJumpTableEncoding();
1214 X86TargetLowering::LowerCustomJumpTableEntry(const MachineJumpTableInfo *MJTI,
1215 const MachineBasicBlock *MBB,
1216 unsigned uid,MCContext &Ctx) const{
1217 assert(getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1218 Subtarget->isPICStyleGOT());
1219 // In 32-bit ELF systems, our jump table entries are formed with @GOTOFF
1221 return MCSymbolRefExpr::Create(MBB->getSymbol(),
1222 MCSymbolRefExpr::VK_GOTOFF, Ctx);
1225 /// getPICJumpTableRelocaBase - Returns relocation base for the given PIC
1227 SDValue X86TargetLowering::getPICJumpTableRelocBase(SDValue Table,
1228 SelectionDAG &DAG) const {
1229 if (!Subtarget->is64Bit())
1230 // This doesn't have DebugLoc associated with it, but is not really the
1231 // same as a Register.
1232 return DAG.getNode(X86ISD::GlobalBaseReg, DebugLoc(), getPointerTy());
1236 /// getPICJumpTableRelocBaseExpr - This returns the relocation base for the
1237 /// given PIC jumptable, the same as getPICJumpTableRelocBase, but as an
1239 const MCExpr *X86TargetLowering::
1240 getPICJumpTableRelocBaseExpr(const MachineFunction *MF, unsigned JTI,
1241 MCContext &Ctx) const {
1242 // X86-64 uses RIP relative addressing based on the jump table label.
1243 if (Subtarget->isPICStyleRIPRel())
1244 return TargetLowering::getPICJumpTableRelocBaseExpr(MF, JTI, Ctx);
1246 // Otherwise, the reference is relative to the PIC base.
1247 return MCSymbolRefExpr::Create(MF->getPICBaseSymbol(), Ctx);
1250 /// getFunctionAlignment - Return the Log2 alignment of this function.
1251 unsigned X86TargetLowering::getFunctionAlignment(const Function *F) const {
1252 return F->hasFnAttr(Attribute::OptimizeForSize) ? 0 : 4;
1255 // FIXME: Why this routine is here? Move to RegInfo!
1256 std::pair<const TargetRegisterClass*, uint8_t>
1257 X86TargetLowering::findRepresentativeClass(EVT VT) const{
1258 const TargetRegisterClass *RRC = 0;
1260 switch (VT.getSimpleVT().SimpleTy) {
1262 return TargetLowering::findRepresentativeClass(VT);
1263 case MVT::i8: case MVT::i16: case MVT::i32: case MVT::i64:
1264 RRC = (Subtarget->is64Bit()
1265 ? X86::GR64RegisterClass : X86::GR32RegisterClass);
1268 RRC = X86::VR64RegisterClass;
1270 case MVT::f32: case MVT::f64:
1271 case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64:
1272 case MVT::v4f32: case MVT::v2f64:
1273 case MVT::v32i8: case MVT::v8i32: case MVT::v4i64: case MVT::v8f32:
1275 RRC = X86::VR128RegisterClass;
1278 return std::make_pair(RRC, Cost);
1281 bool X86TargetLowering::getStackCookieLocation(unsigned &AddressSpace,
1282 unsigned &Offset) const {
1283 if (!Subtarget->isTargetLinux())
1286 if (Subtarget->is64Bit()) {
1287 // %fs:0x28, unless we're using a Kernel code model, in which case it's %gs:
1289 if (getTargetMachine().getCodeModel() == CodeModel::Kernel)
1302 //===----------------------------------------------------------------------===//
1303 // Return Value Calling Convention Implementation
1304 //===----------------------------------------------------------------------===//
1306 #include "X86GenCallingConv.inc"
1309 X86TargetLowering::CanLowerReturn(CallingConv::ID CallConv, bool isVarArg,
1310 const SmallVectorImpl<ISD::OutputArg> &Outs,
1311 LLVMContext &Context) const {
1312 SmallVector<CCValAssign, 16> RVLocs;
1313 CCState CCInfo(CallConv, isVarArg, getTargetMachine(),
1315 return CCInfo.CheckReturn(Outs, RetCC_X86);
1319 X86TargetLowering::LowerReturn(SDValue Chain,
1320 CallingConv::ID CallConv, bool isVarArg,
1321 const SmallVectorImpl<ISD::OutputArg> &Outs,
1322 const SmallVectorImpl<SDValue> &OutVals,
1323 DebugLoc dl, SelectionDAG &DAG) const {
1324 MachineFunction &MF = DAG.getMachineFunction();
1325 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1327 SmallVector<CCValAssign, 16> RVLocs;
1328 CCState CCInfo(CallConv, isVarArg, getTargetMachine(),
1329 RVLocs, *DAG.getContext());
1330 CCInfo.AnalyzeReturn(Outs, RetCC_X86);
1332 // Add the regs to the liveout set for the function.
1333 MachineRegisterInfo &MRI = DAG.getMachineFunction().getRegInfo();
1334 for (unsigned i = 0; i != RVLocs.size(); ++i)
1335 if (RVLocs[i].isRegLoc() && !MRI.isLiveOut(RVLocs[i].getLocReg()))
1336 MRI.addLiveOut(RVLocs[i].getLocReg());
1340 SmallVector<SDValue, 6> RetOps;
1341 RetOps.push_back(Chain); // Operand #0 = Chain (updated below)
1342 // Operand #1 = Bytes To Pop
1343 RetOps.push_back(DAG.getTargetConstant(FuncInfo->getBytesToPopOnReturn(),
1346 // Copy the result values into the output registers.
1347 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1348 CCValAssign &VA = RVLocs[i];
1349 assert(VA.isRegLoc() && "Can only return in registers!");
1350 SDValue ValToCopy = OutVals[i];
1351 EVT ValVT = ValToCopy.getValueType();
1353 // If this is x86-64, and we disabled SSE, we can't return FP values,
1354 // or SSE or MMX vectors.
1355 if ((ValVT == MVT::f32 || ValVT == MVT::f64 ||
1356 VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) &&
1357 (Subtarget->is64Bit() && !Subtarget->hasXMM())) {
1358 report_fatal_error("SSE register return with SSE disabled");
1360 // Likewise we can't return F64 values with SSE1 only. gcc does so, but
1361 // llvm-gcc has never done it right and no one has noticed, so this
1362 // should be OK for now.
1363 if (ValVT == MVT::f64 &&
1364 (Subtarget->is64Bit() && !Subtarget->hasXMMInt()))
1365 report_fatal_error("SSE2 register return with SSE2 disabled");
1367 // Returns in ST0/ST1 are handled specially: these are pushed as operands to
1368 // the RET instruction and handled by the FP Stackifier.
1369 if (VA.getLocReg() == X86::ST0 ||
1370 VA.getLocReg() == X86::ST1) {
1371 // If this is a copy from an xmm register to ST(0), use an FPExtend to
1372 // change the value to the FP stack register class.
1373 if (isScalarFPTypeInSSEReg(VA.getValVT()))
1374 ValToCopy = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f80, ValToCopy);
1375 RetOps.push_back(ValToCopy);
1376 // Don't emit a copytoreg.
1380 // 64-bit vector (MMX) values are returned in XMM0 / XMM1 except for v1i64
1381 // which is returned in RAX / RDX.
1382 if (Subtarget->is64Bit()) {
1383 if (ValVT == MVT::x86mmx) {
1384 if (VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) {
1385 ValToCopy = DAG.getNode(ISD::BITCAST, dl, MVT::i64, ValToCopy);
1386 ValToCopy = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64,
1388 // If we don't have SSE2 available, convert to v4f32 so the generated
1389 // register is legal.
1390 if (!Subtarget->hasSSE2())
1391 ValToCopy = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32,ValToCopy);
1396 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), ValToCopy, Flag);
1397 Flag = Chain.getValue(1);
1400 // The x86-64 ABI for returning structs by value requires that we copy
1401 // the sret argument into %rax for the return. We saved the argument into
1402 // a virtual register in the entry block, so now we copy the value out
1404 if (Subtarget->is64Bit() &&
1405 DAG.getMachineFunction().getFunction()->hasStructRetAttr()) {
1406 MachineFunction &MF = DAG.getMachineFunction();
1407 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1408 unsigned Reg = FuncInfo->getSRetReturnReg();
1410 "SRetReturnReg should have been set in LowerFormalArguments().");
1411 SDValue Val = DAG.getCopyFromReg(Chain, dl, Reg, getPointerTy());
1413 Chain = DAG.getCopyToReg(Chain, dl, X86::RAX, Val, Flag);
1414 Flag = Chain.getValue(1);
1416 // RAX now acts like a return value.
1417 MRI.addLiveOut(X86::RAX);
1420 RetOps[0] = Chain; // Update chain.
1422 // Add the flag if we have it.
1424 RetOps.push_back(Flag);
1426 return DAG.getNode(X86ISD::RET_FLAG, dl,
1427 MVT::Other, &RetOps[0], RetOps.size());
1430 bool X86TargetLowering::isUsedByReturnOnly(SDNode *N) const {
1431 if (N->getNumValues() != 1)
1433 if (!N->hasNUsesOfValue(1, 0))
1436 SDNode *Copy = *N->use_begin();
1437 if (Copy->getOpcode() != ISD::CopyToReg &&
1438 Copy->getOpcode() != ISD::FP_EXTEND)
1441 bool HasRet = false;
1442 for (SDNode::use_iterator UI = Copy->use_begin(), UE = Copy->use_end();
1444 if (UI->getOpcode() != X86ISD::RET_FLAG)
1453 X86TargetLowering::getTypeForExtArgOrReturn(LLVMContext &Context, EVT VT,
1454 ISD::NodeType ExtendKind) const {
1456 // TODO: Is this also valid on 32-bit?
1457 if (Subtarget->is64Bit() && VT == MVT::i1 && ExtendKind == ISD::ZERO_EXTEND)
1458 ReturnMVT = MVT::i8;
1460 ReturnMVT = MVT::i32;
1462 EVT MinVT = getRegisterType(Context, ReturnMVT);
1463 return VT.bitsLT(MinVT) ? MinVT : VT;
1466 /// LowerCallResult - Lower the result values of a call into the
1467 /// appropriate copies out of appropriate physical registers.
1470 X86TargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
1471 CallingConv::ID CallConv, bool isVarArg,
1472 const SmallVectorImpl<ISD::InputArg> &Ins,
1473 DebugLoc dl, SelectionDAG &DAG,
1474 SmallVectorImpl<SDValue> &InVals) const {
1476 // Assign locations to each value returned by this call.
1477 SmallVector<CCValAssign, 16> RVLocs;
1478 bool Is64Bit = Subtarget->is64Bit();
1479 CCState CCInfo(CallConv, isVarArg, getTargetMachine(),
1480 RVLocs, *DAG.getContext());
1481 CCInfo.AnalyzeCallResult(Ins, RetCC_X86);
1483 // Copy all of the result registers out of their specified physreg.
1484 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1485 CCValAssign &VA = RVLocs[i];
1486 EVT CopyVT = VA.getValVT();
1488 // If this is x86-64, and we disabled SSE, we can't return FP values
1489 if ((CopyVT == MVT::f32 || CopyVT == MVT::f64) &&
1490 ((Is64Bit || Ins[i].Flags.isInReg()) && !Subtarget->hasXMM())) {
1491 report_fatal_error("SSE register return with SSE disabled");
1496 // If this is a call to a function that returns an fp value on the floating
1497 // point stack, we must guarantee the the value is popped from the stack, so
1498 // a CopyFromReg is not good enough - the copy instruction may be eliminated
1499 // if the return value is not used. We use the FpGET_ST0 instructions
1501 if (VA.getLocReg() == X86::ST0 || VA.getLocReg() == X86::ST1) {
1502 // If we prefer to use the value in xmm registers, copy it out as f80 and
1503 // use a truncate to move it from fp stack reg to xmm reg.
1504 if (isScalarFPTypeInSSEReg(VA.getValVT())) CopyVT = MVT::f80;
1505 bool isST0 = VA.getLocReg() == X86::ST0;
1507 if (CopyVT == MVT::f32) Opc = isST0 ? X86::FpGET_ST0_32:X86::FpGET_ST1_32;
1508 if (CopyVT == MVT::f64) Opc = isST0 ? X86::FpGET_ST0_64:X86::FpGET_ST1_64;
1509 if (CopyVT == MVT::f80) Opc = isST0 ? X86::FpGET_ST0_80:X86::FpGET_ST1_80;
1510 SDValue Ops[] = { Chain, InFlag };
1511 Chain = SDValue(DAG.getMachineNode(Opc, dl, CopyVT, MVT::Other, MVT::Glue,
1513 Val = Chain.getValue(0);
1515 // Round the f80 to the right size, which also moves it to the appropriate
1517 if (CopyVT != VA.getValVT())
1518 Val = DAG.getNode(ISD::FP_ROUND, dl, VA.getValVT(), Val,
1519 // This truncation won't change the value.
1520 DAG.getIntPtrConstant(1));
1521 } else if (Is64Bit && CopyVT.isVector() && CopyVT.getSizeInBits() == 64) {
1522 // For x86-64, MMX values are returned in XMM0 / XMM1 except for v1i64.
1523 if (VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) {
1524 Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
1525 MVT::v2i64, InFlag).getValue(1);
1526 Val = Chain.getValue(0);
1527 Val = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i64,
1528 Val, DAG.getConstant(0, MVT::i64));
1530 Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
1531 MVT::i64, InFlag).getValue(1);
1532 Val = Chain.getValue(0);
1534 Val = DAG.getNode(ISD::BITCAST, dl, CopyVT, Val);
1536 Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
1537 CopyVT, InFlag).getValue(1);
1538 Val = Chain.getValue(0);
1540 InFlag = Chain.getValue(2);
1541 InVals.push_back(Val);
1548 //===----------------------------------------------------------------------===//
1549 // C & StdCall & Fast Calling Convention implementation
1550 //===----------------------------------------------------------------------===//
1551 // StdCall calling convention seems to be standard for many Windows' API
1552 // routines and around. It differs from C calling convention just a little:
1553 // callee should clean up the stack, not caller. Symbols should be also
1554 // decorated in some fancy way :) It doesn't support any vector arguments.
1555 // For info on fast calling convention see Fast Calling Convention (tail call)
1556 // implementation LowerX86_32FastCCCallTo.
1558 /// CallIsStructReturn - Determines whether a call uses struct return
1560 static bool CallIsStructReturn(const SmallVectorImpl<ISD::OutputArg> &Outs) {
1564 return Outs[0].Flags.isSRet();
1567 /// ArgsAreStructReturn - Determines whether a function uses struct
1568 /// return semantics.
1570 ArgsAreStructReturn(const SmallVectorImpl<ISD::InputArg> &Ins) {
1574 return Ins[0].Flags.isSRet();
1577 /// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
1578 /// by "Src" to address "Dst" with size and alignment information specified by
1579 /// the specific parameter attribute. The copy will be passed as a byval
1580 /// function parameter.
1582 CreateCopyOfByValArgument(SDValue Src, SDValue Dst, SDValue Chain,
1583 ISD::ArgFlagsTy Flags, SelectionDAG &DAG,
1585 SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), MVT::i32);
1587 return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
1588 /*isVolatile*/false, /*AlwaysInline=*/true,
1589 MachinePointerInfo(), MachinePointerInfo());
1592 /// IsTailCallConvention - Return true if the calling convention is one that
1593 /// supports tail call optimization.
1594 static bool IsTailCallConvention(CallingConv::ID CC) {
1595 return (CC == CallingConv::Fast || CC == CallingConv::GHC);
1598 bool X86TargetLowering::mayBeEmittedAsTailCall(CallInst *CI) const {
1599 if (!CI->isTailCall())
1603 CallingConv::ID CalleeCC = CS.getCallingConv();
1604 if (!IsTailCallConvention(CalleeCC) && CalleeCC != CallingConv::C)
1610 /// FuncIsMadeTailCallSafe - Return true if the function is being made into
1611 /// a tailcall target by changing its ABI.
1612 static bool FuncIsMadeTailCallSafe(CallingConv::ID CC) {
1613 return GuaranteedTailCallOpt && IsTailCallConvention(CC);
1617 X86TargetLowering::LowerMemArgument(SDValue Chain,
1618 CallingConv::ID CallConv,
1619 const SmallVectorImpl<ISD::InputArg> &Ins,
1620 DebugLoc dl, SelectionDAG &DAG,
1621 const CCValAssign &VA,
1622 MachineFrameInfo *MFI,
1624 // Create the nodes corresponding to a load from this parameter slot.
1625 ISD::ArgFlagsTy Flags = Ins[i].Flags;
1626 bool AlwaysUseMutable = FuncIsMadeTailCallSafe(CallConv);
1627 bool isImmutable = !AlwaysUseMutable && !Flags.isByVal();
1630 // If value is passed by pointer we have address passed instead of the value
1632 if (VA.getLocInfo() == CCValAssign::Indirect)
1633 ValVT = VA.getLocVT();
1635 ValVT = VA.getValVT();
1637 // FIXME: For now, all byval parameter objects are marked mutable. This can be
1638 // changed with more analysis.
1639 // In case of tail call optimization mark all arguments mutable. Since they
1640 // could be overwritten by lowering of arguments in case of a tail call.
1641 if (Flags.isByVal()) {
1642 unsigned Bytes = Flags.getByValSize();
1643 if (Bytes == 0) Bytes = 1; // Don't create zero-sized stack objects.
1644 int FI = MFI->CreateFixedObject(Bytes, VA.getLocMemOffset(), isImmutable);
1645 return DAG.getFrameIndex(FI, getPointerTy());
1647 int FI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
1648 VA.getLocMemOffset(), isImmutable);
1649 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
1650 return DAG.getLoad(ValVT, dl, Chain, FIN,
1651 MachinePointerInfo::getFixedStack(FI),
1657 X86TargetLowering::LowerFormalArguments(SDValue Chain,
1658 CallingConv::ID CallConv,
1660 const SmallVectorImpl<ISD::InputArg> &Ins,
1663 SmallVectorImpl<SDValue> &InVals)
1665 MachineFunction &MF = DAG.getMachineFunction();
1666 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1668 const Function* Fn = MF.getFunction();
1669 if (Fn->hasExternalLinkage() &&
1670 Subtarget->isTargetCygMing() &&
1671 Fn->getName() == "main")
1672 FuncInfo->setForceFramePointer(true);
1674 MachineFrameInfo *MFI = MF.getFrameInfo();
1675 bool Is64Bit = Subtarget->is64Bit();
1676 bool IsWin64 = Subtarget->isTargetWin64();
1678 assert(!(isVarArg && IsTailCallConvention(CallConv)) &&
1679 "Var args not supported with calling convention fastcc or ghc");
1681 // Assign locations to all of the incoming arguments.
1682 SmallVector<CCValAssign, 16> ArgLocs;
1683 CCState CCInfo(CallConv, isVarArg, getTargetMachine(),
1684 ArgLocs, *DAG.getContext());
1686 // Allocate shadow area for Win64
1688 CCInfo.AllocateStack(32, 8);
1691 CCInfo.AnalyzeFormalArguments(Ins, CC_X86);
1693 unsigned LastVal = ~0U;
1695 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
1696 CCValAssign &VA = ArgLocs[i];
1697 // TODO: If an arg is passed in two places (e.g. reg and stack), skip later
1699 assert(VA.getValNo() != LastVal &&
1700 "Don't support value assigned to multiple locs yet");
1701 LastVal = VA.getValNo();
1703 if (VA.isRegLoc()) {
1704 EVT RegVT = VA.getLocVT();
1705 TargetRegisterClass *RC = NULL;
1706 if (RegVT == MVT::i32)
1707 RC = X86::GR32RegisterClass;
1708 else if (Is64Bit && RegVT == MVT::i64)
1709 RC = X86::GR64RegisterClass;
1710 else if (RegVT == MVT::f32)
1711 RC = X86::FR32RegisterClass;
1712 else if (RegVT == MVT::f64)
1713 RC = X86::FR64RegisterClass;
1714 else if (RegVT.isVector() && RegVT.getSizeInBits() == 256)
1715 RC = X86::VR256RegisterClass;
1716 else if (RegVT.isVector() && RegVT.getSizeInBits() == 128)
1717 RC = X86::VR128RegisterClass;
1718 else if (RegVT == MVT::x86mmx)
1719 RC = X86::VR64RegisterClass;
1721 llvm_unreachable("Unknown argument type!");
1723 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
1724 ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
1726 // If this is an 8 or 16-bit value, it is really passed promoted to 32
1727 // bits. Insert an assert[sz]ext to capture this, then truncate to the
1729 if (VA.getLocInfo() == CCValAssign::SExt)
1730 ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue,
1731 DAG.getValueType(VA.getValVT()));
1732 else if (VA.getLocInfo() == CCValAssign::ZExt)
1733 ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue,
1734 DAG.getValueType(VA.getValVT()));
1735 else if (VA.getLocInfo() == CCValAssign::BCvt)
1736 ArgValue = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), ArgValue);
1738 if (VA.isExtInLoc()) {
1739 // Handle MMX values passed in XMM regs.
1740 if (RegVT.isVector()) {
1741 ArgValue = DAG.getNode(X86ISD::MOVDQ2Q, dl, VA.getValVT(),
1744 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
1747 assert(VA.isMemLoc());
1748 ArgValue = LowerMemArgument(Chain, CallConv, Ins, dl, DAG, VA, MFI, i);
1751 // If value is passed via pointer - do a load.
1752 if (VA.getLocInfo() == CCValAssign::Indirect)
1753 ArgValue = DAG.getLoad(VA.getValVT(), dl, Chain, ArgValue,
1754 MachinePointerInfo(), false, false, 0);
1756 InVals.push_back(ArgValue);
1759 // The x86-64 ABI for returning structs by value requires that we copy
1760 // the sret argument into %rax for the return. Save the argument into
1761 // a virtual register so that we can access it from the return points.
1762 if (Is64Bit && MF.getFunction()->hasStructRetAttr()) {
1763 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1764 unsigned Reg = FuncInfo->getSRetReturnReg();
1766 Reg = MF.getRegInfo().createVirtualRegister(getRegClassFor(MVT::i64));
1767 FuncInfo->setSRetReturnReg(Reg);
1769 SDValue Copy = DAG.getCopyToReg(DAG.getEntryNode(), dl, Reg, InVals[0]);
1770 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Copy, Chain);
1773 unsigned StackSize = CCInfo.getNextStackOffset();
1774 // Align stack specially for tail calls.
1775 if (FuncIsMadeTailCallSafe(CallConv))
1776 StackSize = GetAlignedArgumentStackSize(StackSize, DAG);
1778 // If the function takes variable number of arguments, make a frame index for
1779 // the start of the first vararg value... for expansion of llvm.va_start.
1781 if (Is64Bit || (CallConv != CallingConv::X86_FastCall &&
1782 CallConv != CallingConv::X86_ThisCall)) {
1783 FuncInfo->setVarArgsFrameIndex(MFI->CreateFixedObject(1, StackSize,true));
1786 unsigned TotalNumIntRegs = 0, TotalNumXMMRegs = 0;
1788 // FIXME: We should really autogenerate these arrays
1789 static const unsigned GPR64ArgRegsWin64[] = {
1790 X86::RCX, X86::RDX, X86::R8, X86::R9
1792 static const unsigned GPR64ArgRegs64Bit[] = {
1793 X86::RDI, X86::RSI, X86::RDX, X86::RCX, X86::R8, X86::R9
1795 static const unsigned XMMArgRegs64Bit[] = {
1796 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
1797 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
1799 const unsigned *GPR64ArgRegs;
1800 unsigned NumXMMRegs = 0;
1803 // The XMM registers which might contain var arg parameters are shadowed
1804 // in their paired GPR. So we only need to save the GPR to their home
1806 TotalNumIntRegs = 4;
1807 GPR64ArgRegs = GPR64ArgRegsWin64;
1809 TotalNumIntRegs = 6; TotalNumXMMRegs = 8;
1810 GPR64ArgRegs = GPR64ArgRegs64Bit;
1812 NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs64Bit, TotalNumXMMRegs);
1814 unsigned NumIntRegs = CCInfo.getFirstUnallocated(GPR64ArgRegs,
1817 bool NoImplicitFloatOps = Fn->hasFnAttr(Attribute::NoImplicitFloat);
1818 assert(!(NumXMMRegs && !Subtarget->hasXMM()) &&
1819 "SSE register cannot be used when SSE is disabled!");
1820 assert(!(NumXMMRegs && UseSoftFloat && NoImplicitFloatOps) &&
1821 "SSE register cannot be used when SSE is disabled!");
1822 if (UseSoftFloat || NoImplicitFloatOps || !Subtarget->hasXMM())
1823 // Kernel mode asks for SSE to be disabled, so don't push them
1825 TotalNumXMMRegs = 0;
1828 const TargetFrameLowering &TFI = *getTargetMachine().getFrameLowering();
1829 // Get to the caller-allocated home save location. Add 8 to account
1830 // for the return address.
1831 int HomeOffset = TFI.getOffsetOfLocalArea() + 8;
1832 FuncInfo->setRegSaveFrameIndex(
1833 MFI->CreateFixedObject(1, NumIntRegs * 8 + HomeOffset, false));
1834 // Fixup to set vararg frame on shadow area (4 x i64).
1836 FuncInfo->setVarArgsFrameIndex(FuncInfo->getRegSaveFrameIndex());
1838 // For X86-64, if there are vararg parameters that are passed via
1839 // registers, then we must store them to their spots on the stack so they
1840 // may be loaded by deferencing the result of va_next.
1841 FuncInfo->setVarArgsGPOffset(NumIntRegs * 8);
1842 FuncInfo->setVarArgsFPOffset(TotalNumIntRegs * 8 + NumXMMRegs * 16);
1843 FuncInfo->setRegSaveFrameIndex(
1844 MFI->CreateStackObject(TotalNumIntRegs * 8 + TotalNumXMMRegs * 16, 16,
1848 // Store the integer parameter registers.
1849 SmallVector<SDValue, 8> MemOps;
1850 SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(),
1852 unsigned Offset = FuncInfo->getVarArgsGPOffset();
1853 for (; NumIntRegs != TotalNumIntRegs; ++NumIntRegs) {
1854 SDValue FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), RSFIN,
1855 DAG.getIntPtrConstant(Offset));
1856 unsigned VReg = MF.addLiveIn(GPR64ArgRegs[NumIntRegs],
1857 X86::GR64RegisterClass);
1858 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);
1860 DAG.getStore(Val.getValue(1), dl, Val, FIN,
1861 MachinePointerInfo::getFixedStack(
1862 FuncInfo->getRegSaveFrameIndex(), Offset),
1864 MemOps.push_back(Store);
1868 if (TotalNumXMMRegs != 0 && NumXMMRegs != TotalNumXMMRegs) {
1869 // Now store the XMM (fp + vector) parameter registers.
1870 SmallVector<SDValue, 11> SaveXMMOps;
1871 SaveXMMOps.push_back(Chain);
1873 unsigned AL = MF.addLiveIn(X86::AL, X86::GR8RegisterClass);
1874 SDValue ALVal = DAG.getCopyFromReg(DAG.getEntryNode(), dl, AL, MVT::i8);
1875 SaveXMMOps.push_back(ALVal);
1877 SaveXMMOps.push_back(DAG.getIntPtrConstant(
1878 FuncInfo->getRegSaveFrameIndex()));
1879 SaveXMMOps.push_back(DAG.getIntPtrConstant(
1880 FuncInfo->getVarArgsFPOffset()));
1882 for (; NumXMMRegs != TotalNumXMMRegs; ++NumXMMRegs) {
1883 unsigned VReg = MF.addLiveIn(XMMArgRegs64Bit[NumXMMRegs],
1884 X86::VR128RegisterClass);
1885 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::v4f32);
1886 SaveXMMOps.push_back(Val);
1888 MemOps.push_back(DAG.getNode(X86ISD::VASTART_SAVE_XMM_REGS, dl,
1890 &SaveXMMOps[0], SaveXMMOps.size()));
1893 if (!MemOps.empty())
1894 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
1895 &MemOps[0], MemOps.size());
1899 // Some CCs need callee pop.
1900 if (Subtarget->IsCalleePop(isVarArg, CallConv)) {
1901 FuncInfo->setBytesToPopOnReturn(StackSize); // Callee pops everything.
1903 FuncInfo->setBytesToPopOnReturn(0); // Callee pops nothing.
1904 // If this is an sret function, the return should pop the hidden pointer.
1905 if (!Is64Bit && !IsTailCallConvention(CallConv) && ArgsAreStructReturn(Ins))
1906 FuncInfo->setBytesToPopOnReturn(4);
1910 // RegSaveFrameIndex is X86-64 only.
1911 FuncInfo->setRegSaveFrameIndex(0xAAAAAAA);
1912 if (CallConv == CallingConv::X86_FastCall ||
1913 CallConv == CallingConv::X86_ThisCall)
1914 // fastcc functions can't have varargs.
1915 FuncInfo->setVarArgsFrameIndex(0xAAAAAAA);
1922 X86TargetLowering::LowerMemOpCallTo(SDValue Chain,
1923 SDValue StackPtr, SDValue Arg,
1924 DebugLoc dl, SelectionDAG &DAG,
1925 const CCValAssign &VA,
1926 ISD::ArgFlagsTy Flags) const {
1927 unsigned LocMemOffset = VA.getLocMemOffset();
1928 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
1929 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
1930 if (Flags.isByVal())
1931 return CreateCopyOfByValArgument(Arg, PtrOff, Chain, Flags, DAG, dl);
1933 return DAG.getStore(Chain, dl, Arg, PtrOff,
1934 MachinePointerInfo::getStack(LocMemOffset),
1938 /// EmitTailCallLoadRetAddr - Emit a load of return address if tail call
1939 /// optimization is performed and it is required.
1941 X86TargetLowering::EmitTailCallLoadRetAddr(SelectionDAG &DAG,
1942 SDValue &OutRetAddr, SDValue Chain,
1943 bool IsTailCall, bool Is64Bit,
1944 int FPDiff, DebugLoc dl) const {
1945 // Adjust the Return address stack slot.
1946 EVT VT = getPointerTy();
1947 OutRetAddr = getReturnAddressFrameIndex(DAG);
1949 // Load the "old" Return address.
1950 OutRetAddr = DAG.getLoad(VT, dl, Chain, OutRetAddr, MachinePointerInfo(),
1952 return SDValue(OutRetAddr.getNode(), 1);
1955 /// EmitTailCallStoreRetAddr - Emit a store of the return adress if tail call
1956 /// optimization is performed and it is required (FPDiff!=0).
1958 EmitTailCallStoreRetAddr(SelectionDAG & DAG, MachineFunction &MF,
1959 SDValue Chain, SDValue RetAddrFrIdx,
1960 bool Is64Bit, int FPDiff, DebugLoc dl) {
1961 // Store the return address to the appropriate stack slot.
1962 if (!FPDiff) return Chain;
1963 // Calculate the new stack slot for the return address.
1964 int SlotSize = Is64Bit ? 8 : 4;
1965 int NewReturnAddrFI =
1966 MF.getFrameInfo()->CreateFixedObject(SlotSize, FPDiff-SlotSize, false);
1967 EVT VT = Is64Bit ? MVT::i64 : MVT::i32;
1968 SDValue NewRetAddrFrIdx = DAG.getFrameIndex(NewReturnAddrFI, VT);
1969 Chain = DAG.getStore(Chain, dl, RetAddrFrIdx, NewRetAddrFrIdx,
1970 MachinePointerInfo::getFixedStack(NewReturnAddrFI),
1976 X86TargetLowering::LowerCall(SDValue Chain, SDValue Callee,
1977 CallingConv::ID CallConv, bool isVarArg,
1979 const SmallVectorImpl<ISD::OutputArg> &Outs,
1980 const SmallVectorImpl<SDValue> &OutVals,
1981 const SmallVectorImpl<ISD::InputArg> &Ins,
1982 DebugLoc dl, SelectionDAG &DAG,
1983 SmallVectorImpl<SDValue> &InVals) const {
1984 MachineFunction &MF = DAG.getMachineFunction();
1985 bool Is64Bit = Subtarget->is64Bit();
1986 bool IsWin64 = Subtarget->isTargetWin64();
1987 bool IsStructRet = CallIsStructReturn(Outs);
1988 bool IsSibcall = false;
1991 // Check if it's really possible to do a tail call.
1992 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv,
1993 isVarArg, IsStructRet, MF.getFunction()->hasStructRetAttr(),
1994 Outs, OutVals, Ins, DAG);
1996 // Sibcalls are automatically detected tailcalls which do not require
1998 if (!GuaranteedTailCallOpt && isTailCall)
2005 assert(!(isVarArg && IsTailCallConvention(CallConv)) &&
2006 "Var args not supported with calling convention fastcc or ghc");
2008 // Analyze operands of the call, assigning locations to each operand.
2009 SmallVector<CCValAssign, 16> ArgLocs;
2010 CCState CCInfo(CallConv, isVarArg, getTargetMachine(),
2011 ArgLocs, *DAG.getContext());
2013 // Allocate shadow area for Win64
2015 CCInfo.AllocateStack(32, 8);
2018 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2020 // Get a count of how many bytes are to be pushed on the stack.
2021 unsigned NumBytes = CCInfo.getNextStackOffset();
2023 // This is a sibcall. The memory operands are available in caller's
2024 // own caller's stack.
2026 else if (GuaranteedTailCallOpt && IsTailCallConvention(CallConv))
2027 NumBytes = GetAlignedArgumentStackSize(NumBytes, DAG);
2030 if (isTailCall && !IsSibcall) {
2031 // Lower arguments at fp - stackoffset + fpdiff.
2032 unsigned NumBytesCallerPushed =
2033 MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn();
2034 FPDiff = NumBytesCallerPushed - NumBytes;
2036 // Set the delta of movement of the returnaddr stackslot.
2037 // But only set if delta is greater than previous delta.
2038 if (FPDiff < (MF.getInfo<X86MachineFunctionInfo>()->getTCReturnAddrDelta()))
2039 MF.getInfo<X86MachineFunctionInfo>()->setTCReturnAddrDelta(FPDiff);
2043 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
2045 SDValue RetAddrFrIdx;
2046 // Load return adress for tail calls.
2047 if (isTailCall && FPDiff)
2048 Chain = EmitTailCallLoadRetAddr(DAG, RetAddrFrIdx, Chain, isTailCall,
2049 Is64Bit, FPDiff, dl);
2051 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
2052 SmallVector<SDValue, 8> MemOpChains;
2055 // Walk the register/memloc assignments, inserting copies/loads. In the case
2056 // of tail call optimization arguments are handle later.
2057 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2058 CCValAssign &VA = ArgLocs[i];
2059 EVT RegVT = VA.getLocVT();
2060 SDValue Arg = OutVals[i];
2061 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2062 bool isByVal = Flags.isByVal();
2064 // Promote the value if needed.
2065 switch (VA.getLocInfo()) {
2066 default: llvm_unreachable("Unknown loc info!");
2067 case CCValAssign::Full: break;
2068 case CCValAssign::SExt:
2069 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, RegVT, Arg);
2071 case CCValAssign::ZExt:
2072 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, RegVT, Arg);
2074 case CCValAssign::AExt:
2075 if (RegVT.isVector() && RegVT.getSizeInBits() == 128) {
2076 // Special case: passing MMX values in XMM registers.
2077 Arg = DAG.getNode(ISD::BITCAST, dl, MVT::i64, Arg);
2078 Arg = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, Arg);
2079 Arg = getMOVL(DAG, dl, MVT::v2i64, DAG.getUNDEF(MVT::v2i64), Arg);
2081 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, RegVT, Arg);
2083 case CCValAssign::BCvt:
2084 Arg = DAG.getNode(ISD::BITCAST, dl, RegVT, Arg);
2086 case CCValAssign::Indirect: {
2087 // Store the argument.
2088 SDValue SpillSlot = DAG.CreateStackTemporary(VA.getValVT());
2089 int FI = cast<FrameIndexSDNode>(SpillSlot)->getIndex();
2090 Chain = DAG.getStore(Chain, dl, Arg, SpillSlot,
2091 MachinePointerInfo::getFixedStack(FI),
2098 if (VA.isRegLoc()) {
2099 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
2100 if (isVarArg && IsWin64) {
2101 // Win64 ABI requires argument XMM reg to be copied to the corresponding
2102 // shadow reg if callee is a varargs function.
2103 unsigned ShadowReg = 0;
2104 switch (VA.getLocReg()) {
2105 case X86::XMM0: ShadowReg = X86::RCX; break;
2106 case X86::XMM1: ShadowReg = X86::RDX; break;
2107 case X86::XMM2: ShadowReg = X86::R8; break;
2108 case X86::XMM3: ShadowReg = X86::R9; break;
2111 RegsToPass.push_back(std::make_pair(ShadowReg, Arg));
2113 } else if (!IsSibcall && (!isTailCall || isByVal)) {
2114 assert(VA.isMemLoc());
2115 if (StackPtr.getNode() == 0)
2116 StackPtr = DAG.getCopyFromReg(Chain, dl, X86StackPtr, getPointerTy());
2117 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg,
2118 dl, DAG, VA, Flags));
2122 if (!MemOpChains.empty())
2123 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2124 &MemOpChains[0], MemOpChains.size());
2126 // Build a sequence of copy-to-reg nodes chained together with token chain
2127 // and flag operands which copy the outgoing args into registers.
2129 // Tail call byval lowering might overwrite argument registers so in case of
2130 // tail call optimization the copies to registers are lowered later.
2132 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2133 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
2134 RegsToPass[i].second, InFlag);
2135 InFlag = Chain.getValue(1);
2138 if (Subtarget->isPICStyleGOT()) {
2139 // ELF / PIC requires GOT in the EBX register before function calls via PLT
2142 Chain = DAG.getCopyToReg(Chain, dl, X86::EBX,
2143 DAG.getNode(X86ISD::GlobalBaseReg,
2144 DebugLoc(), getPointerTy()),
2146 InFlag = Chain.getValue(1);
2148 // If we are tail calling and generating PIC/GOT style code load the
2149 // address of the callee into ECX. The value in ecx is used as target of
2150 // the tail jump. This is done to circumvent the ebx/callee-saved problem
2151 // for tail calls on PIC/GOT architectures. Normally we would just put the
2152 // address of GOT into ebx and then call target@PLT. But for tail calls
2153 // ebx would be restored (since ebx is callee saved) before jumping to the
2156 // Note: The actual moving to ECX is done further down.
2157 GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee);
2158 if (G && !G->getGlobal()->hasHiddenVisibility() &&
2159 !G->getGlobal()->hasProtectedVisibility())
2160 Callee = LowerGlobalAddress(Callee, DAG);
2161 else if (isa<ExternalSymbolSDNode>(Callee))
2162 Callee = LowerExternalSymbol(Callee, DAG);
2166 if (Is64Bit && isVarArg && !IsWin64) {
2167 // From AMD64 ABI document:
2168 // For calls that may call functions that use varargs or stdargs
2169 // (prototype-less calls or calls to functions containing ellipsis (...) in
2170 // the declaration) %al is used as hidden argument to specify the number
2171 // of SSE registers used. The contents of %al do not need to match exactly
2172 // the number of registers, but must be an ubound on the number of SSE
2173 // registers used and is in the range 0 - 8 inclusive.
2175 // Count the number of XMM registers allocated.
2176 static const unsigned XMMArgRegs[] = {
2177 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
2178 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
2180 unsigned NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs, 8);
2181 assert((Subtarget->hasXMM() || !NumXMMRegs)
2182 && "SSE registers cannot be used when SSE is disabled");
2184 Chain = DAG.getCopyToReg(Chain, dl, X86::AL,
2185 DAG.getConstant(NumXMMRegs, MVT::i8), InFlag);
2186 InFlag = Chain.getValue(1);
2190 // For tail calls lower the arguments to the 'real' stack slot.
2192 // Force all the incoming stack arguments to be loaded from the stack
2193 // before any new outgoing arguments are stored to the stack, because the
2194 // outgoing stack slots may alias the incoming argument stack slots, and
2195 // the alias isn't otherwise explicit. This is slightly more conservative
2196 // than necessary, because it means that each store effectively depends
2197 // on every argument instead of just those arguments it would clobber.
2198 SDValue ArgChain = DAG.getStackArgumentTokenFactor(Chain);
2200 SmallVector<SDValue, 8> MemOpChains2;
2203 // Do not flag preceeding copytoreg stuff together with the following stuff.
2205 if (GuaranteedTailCallOpt) {
2206 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2207 CCValAssign &VA = ArgLocs[i];
2210 assert(VA.isMemLoc());
2211 SDValue Arg = OutVals[i];
2212 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2213 // Create frame index.
2214 int32_t Offset = VA.getLocMemOffset()+FPDiff;
2215 uint32_t OpSize = (VA.getLocVT().getSizeInBits()+7)/8;
2216 FI = MF.getFrameInfo()->CreateFixedObject(OpSize, Offset, true);
2217 FIN = DAG.getFrameIndex(FI, getPointerTy());
2219 if (Flags.isByVal()) {
2220 // Copy relative to framepointer.
2221 SDValue Source = DAG.getIntPtrConstant(VA.getLocMemOffset());
2222 if (StackPtr.getNode() == 0)
2223 StackPtr = DAG.getCopyFromReg(Chain, dl, X86StackPtr,
2225 Source = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, Source);
2227 MemOpChains2.push_back(CreateCopyOfByValArgument(Source, FIN,
2231 // Store relative to framepointer.
2232 MemOpChains2.push_back(
2233 DAG.getStore(ArgChain, dl, Arg, FIN,
2234 MachinePointerInfo::getFixedStack(FI),
2240 if (!MemOpChains2.empty())
2241 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2242 &MemOpChains2[0], MemOpChains2.size());
2244 // Copy arguments to their registers.
2245 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2246 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
2247 RegsToPass[i].second, InFlag);
2248 InFlag = Chain.getValue(1);
2252 // Store the return address to the appropriate stack slot.
2253 Chain = EmitTailCallStoreRetAddr(DAG, MF, Chain, RetAddrFrIdx, Is64Bit,
2257 if (getTargetMachine().getCodeModel() == CodeModel::Large) {
2258 assert(Is64Bit && "Large code model is only legal in 64-bit mode.");
2259 // In the 64-bit large code model, we have to make all calls
2260 // through a register, since the call instruction's 32-bit
2261 // pc-relative offset may not be large enough to hold the whole
2263 } else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2264 // If the callee is a GlobalAddress node (quite common, every direct call
2265 // is) turn it into a TargetGlobalAddress node so that legalize doesn't hack
2268 // We should use extra load for direct calls to dllimported functions in
2270 const GlobalValue *GV = G->getGlobal();
2271 if (!GV->hasDLLImportLinkage()) {
2272 unsigned char OpFlags = 0;
2274 // On ELF targets, in both X86-64 and X86-32 mode, direct calls to
2275 // external symbols most go through the PLT in PIC mode. If the symbol
2276 // has hidden or protected visibility, or if it is static or local, then
2277 // we don't need to use the PLT - we can directly call it.
2278 if (Subtarget->isTargetELF() &&
2279 getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
2280 GV->hasDefaultVisibility() && !GV->hasLocalLinkage()) {
2281 OpFlags = X86II::MO_PLT;
2282 } else if (Subtarget->isPICStyleStubAny() &&
2283 (GV->isDeclaration() || GV->isWeakForLinker()) &&
2284 Subtarget->getDarwinVers() < 9) {
2285 // PC-relative references to external symbols should go through $stub,
2286 // unless we're building with the leopard linker or later, which
2287 // automatically synthesizes these stubs.
2288 OpFlags = X86II::MO_DARWIN_STUB;
2291 Callee = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(),
2292 G->getOffset(), OpFlags);
2294 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
2295 unsigned char OpFlags = 0;
2297 // On ELF targets, in either X86-64 or X86-32 mode, direct calls to
2298 // external symbols should go through the PLT.
2299 if (Subtarget->isTargetELF() &&
2300 getTargetMachine().getRelocationModel() == Reloc::PIC_) {
2301 OpFlags = X86II::MO_PLT;
2302 } else if (Subtarget->isPICStyleStubAny() &&
2303 Subtarget->getDarwinVers() < 9) {
2304 // PC-relative references to external symbols should go through $stub,
2305 // unless we're building with the leopard linker or later, which
2306 // automatically synthesizes these stubs.
2307 OpFlags = X86II::MO_DARWIN_STUB;
2310 Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy(),
2314 // Returns a chain & a flag for retval copy to use.
2315 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
2316 SmallVector<SDValue, 8> Ops;
2318 if (!IsSibcall && isTailCall) {
2319 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
2320 DAG.getIntPtrConstant(0, true), InFlag);
2321 InFlag = Chain.getValue(1);
2324 Ops.push_back(Chain);
2325 Ops.push_back(Callee);
2328 Ops.push_back(DAG.getConstant(FPDiff, MVT::i32));
2330 // Add argument registers to the end of the list so that they are known live
2332 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
2333 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
2334 RegsToPass[i].second.getValueType()));
2336 // Add an implicit use GOT pointer in EBX.
2337 if (!isTailCall && Subtarget->isPICStyleGOT())
2338 Ops.push_back(DAG.getRegister(X86::EBX, getPointerTy()));
2340 // Add an implicit use of AL for non-Windows x86 64-bit vararg functions.
2341 if (Is64Bit && isVarArg && !IsWin64)
2342 Ops.push_back(DAG.getRegister(X86::AL, MVT::i8));
2344 if (InFlag.getNode())
2345 Ops.push_back(InFlag);
2349 //// If this is the first return lowered for this function, add the regs
2350 //// to the liveout set for the function.
2351 // This isn't right, although it's probably harmless on x86; liveouts
2352 // should be computed from returns not tail calls. Consider a void
2353 // function making a tail call to a function returning int.
2354 return DAG.getNode(X86ISD::TC_RETURN, dl,
2355 NodeTys, &Ops[0], Ops.size());
2358 Chain = DAG.getNode(X86ISD::CALL, dl, NodeTys, &Ops[0], Ops.size());
2359 InFlag = Chain.getValue(1);
2361 // Create the CALLSEQ_END node.
2362 unsigned NumBytesForCalleeToPush;
2363 if (Subtarget->IsCalleePop(isVarArg, CallConv))
2364 NumBytesForCalleeToPush = NumBytes; // Callee pops everything
2365 else if (!Is64Bit && !IsTailCallConvention(CallConv) && IsStructRet)
2366 // If this is a call to a struct-return function, the callee
2367 // pops the hidden struct pointer, so we have to push it back.
2368 // This is common for Darwin/X86, Linux & Mingw32 targets.
2369 NumBytesForCalleeToPush = 4;
2371 NumBytesForCalleeToPush = 0; // Callee pops nothing.
2373 // Returns a flag for retval copy to use.
2375 Chain = DAG.getCALLSEQ_END(Chain,
2376 DAG.getIntPtrConstant(NumBytes, true),
2377 DAG.getIntPtrConstant(NumBytesForCalleeToPush,
2380 InFlag = Chain.getValue(1);
2383 // Handle result values, copying them out of physregs into vregs that we
2385 return LowerCallResult(Chain, InFlag, CallConv, isVarArg,
2386 Ins, dl, DAG, InVals);
2390 //===----------------------------------------------------------------------===//
2391 // Fast Calling Convention (tail call) implementation
2392 //===----------------------------------------------------------------------===//
2394 // Like std call, callee cleans arguments, convention except that ECX is
2395 // reserved for storing the tail called function address. Only 2 registers are
2396 // free for argument passing (inreg). Tail call optimization is performed
2398 // * tailcallopt is enabled
2399 // * caller/callee are fastcc
2400 // On X86_64 architecture with GOT-style position independent code only local
2401 // (within module) calls are supported at the moment.
2402 // To keep the stack aligned according to platform abi the function
2403 // GetAlignedArgumentStackSize ensures that argument delta is always multiples
2404 // of stack alignment. (Dynamic linkers need this - darwin's dyld for example)
2405 // If a tail called function callee has more arguments than the caller the
2406 // caller needs to make sure that there is room to move the RETADDR to. This is
2407 // achieved by reserving an area the size of the argument delta right after the
2408 // original REtADDR, but before the saved framepointer or the spilled registers
2409 // e.g. caller(arg1, arg2) calls callee(arg1, arg2,arg3,arg4)
2421 /// GetAlignedArgumentStackSize - Make the stack size align e.g 16n + 12 aligned
2422 /// for a 16 byte align requirement.
2424 X86TargetLowering::GetAlignedArgumentStackSize(unsigned StackSize,
2425 SelectionDAG& DAG) const {
2426 MachineFunction &MF = DAG.getMachineFunction();
2427 const TargetMachine &TM = MF.getTarget();
2428 const TargetFrameLowering &TFI = *TM.getFrameLowering();
2429 unsigned StackAlignment = TFI.getStackAlignment();
2430 uint64_t AlignMask = StackAlignment - 1;
2431 int64_t Offset = StackSize;
2432 uint64_t SlotSize = TD->getPointerSize();
2433 if ( (Offset & AlignMask) <= (StackAlignment - SlotSize) ) {
2434 // Number smaller than 12 so just add the difference.
2435 Offset += ((StackAlignment - SlotSize) - (Offset & AlignMask));
2437 // Mask out lower bits, add stackalignment once plus the 12 bytes.
2438 Offset = ((~AlignMask) & Offset) + StackAlignment +
2439 (StackAlignment-SlotSize);
2444 /// MatchingStackOffset - Return true if the given stack call argument is
2445 /// already available in the same position (relatively) of the caller's
2446 /// incoming argument stack.
2448 bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags,
2449 MachineFrameInfo *MFI, const MachineRegisterInfo *MRI,
2450 const X86InstrInfo *TII) {
2451 unsigned Bytes = Arg.getValueType().getSizeInBits() / 8;
2453 if (Arg.getOpcode() == ISD::CopyFromReg) {
2454 unsigned VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg();
2455 if (!TargetRegisterInfo::isVirtualRegister(VR))
2457 MachineInstr *Def = MRI->getVRegDef(VR);
2460 if (!Flags.isByVal()) {
2461 if (!TII->isLoadFromStackSlot(Def, FI))
2464 unsigned Opcode = Def->getOpcode();
2465 if ((Opcode == X86::LEA32r || Opcode == X86::LEA64r) &&
2466 Def->getOperand(1).isFI()) {
2467 FI = Def->getOperand(1).getIndex();
2468 Bytes = Flags.getByValSize();
2472 } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) {
2473 if (Flags.isByVal())
2474 // ByVal argument is passed in as a pointer but it's now being
2475 // dereferenced. e.g.
2476 // define @foo(%struct.X* %A) {
2477 // tail call @bar(%struct.X* byval %A)
2480 SDValue Ptr = Ld->getBasePtr();
2481 FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr);
2484 FI = FINode->getIndex();
2488 assert(FI != INT_MAX);
2489 if (!MFI->isFixedObjectIndex(FI))
2491 return Offset == MFI->getObjectOffset(FI) && Bytes == MFI->getObjectSize(FI);
2494 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
2495 /// for tail call optimization. Targets which want to do tail call
2496 /// optimization should implement this function.
2498 X86TargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
2499 CallingConv::ID CalleeCC,
2501 bool isCalleeStructRet,
2502 bool isCallerStructRet,
2503 const SmallVectorImpl<ISD::OutputArg> &Outs,
2504 const SmallVectorImpl<SDValue> &OutVals,
2505 const SmallVectorImpl<ISD::InputArg> &Ins,
2506 SelectionDAG& DAG) const {
2507 if (!IsTailCallConvention(CalleeCC) &&
2508 CalleeCC != CallingConv::C)
2511 // If -tailcallopt is specified, make fastcc functions tail-callable.
2512 const MachineFunction &MF = DAG.getMachineFunction();
2513 const Function *CallerF = DAG.getMachineFunction().getFunction();
2514 CallingConv::ID CallerCC = CallerF->getCallingConv();
2515 bool CCMatch = CallerCC == CalleeCC;
2517 if (GuaranteedTailCallOpt) {
2518 if (IsTailCallConvention(CalleeCC) && CCMatch)
2523 // Look for obvious safe cases to perform tail call optimization that do not
2524 // require ABI changes. This is what gcc calls sibcall.
2526 // Can't do sibcall if stack needs to be dynamically re-aligned. PEI needs to
2527 // emit a special epilogue.
2528 if (RegInfo->needsStackRealignment(MF))
2531 // Do not sibcall optimize vararg calls unless the call site is not passing
2533 if (isVarArg && !Outs.empty())
2536 // Also avoid sibcall optimization if either caller or callee uses struct
2537 // return semantics.
2538 if (isCalleeStructRet || isCallerStructRet)
2541 // If the call result is in ST0 / ST1, it needs to be popped off the x87 stack.
2542 // Therefore if it's not used by the call it is not safe to optimize this into
2544 bool Unused = false;
2545 for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
2552 SmallVector<CCValAssign, 16> RVLocs;
2553 CCState CCInfo(CalleeCC, false, getTargetMachine(),
2554 RVLocs, *DAG.getContext());
2555 CCInfo.AnalyzeCallResult(Ins, RetCC_X86);
2556 for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) {
2557 CCValAssign &VA = RVLocs[i];
2558 if (VA.getLocReg() == X86::ST0 || VA.getLocReg() == X86::ST1)
2563 // If the calling conventions do not match, then we'd better make sure the
2564 // results are returned in the same way as what the caller expects.
2566 SmallVector<CCValAssign, 16> RVLocs1;
2567 CCState CCInfo1(CalleeCC, false, getTargetMachine(),
2568 RVLocs1, *DAG.getContext());
2569 CCInfo1.AnalyzeCallResult(Ins, RetCC_X86);
2571 SmallVector<CCValAssign, 16> RVLocs2;
2572 CCState CCInfo2(CallerCC, false, getTargetMachine(),
2573 RVLocs2, *DAG.getContext());
2574 CCInfo2.AnalyzeCallResult(Ins, RetCC_X86);
2576 if (RVLocs1.size() != RVLocs2.size())
2578 for (unsigned i = 0, e = RVLocs1.size(); i != e; ++i) {
2579 if (RVLocs1[i].isRegLoc() != RVLocs2[i].isRegLoc())
2581 if (RVLocs1[i].getLocInfo() != RVLocs2[i].getLocInfo())
2583 if (RVLocs1[i].isRegLoc()) {
2584 if (RVLocs1[i].getLocReg() != RVLocs2[i].getLocReg())
2587 if (RVLocs1[i].getLocMemOffset() != RVLocs2[i].getLocMemOffset())
2593 // If the callee takes no arguments then go on to check the results of the
2595 if (!Outs.empty()) {
2596 // Check if stack adjustment is needed. For now, do not do this if any
2597 // argument is passed on the stack.
2598 SmallVector<CCValAssign, 16> ArgLocs;
2599 CCState CCInfo(CalleeCC, isVarArg, getTargetMachine(),
2600 ArgLocs, *DAG.getContext());
2602 // Allocate shadow area for Win64
2603 if (Subtarget->isTargetWin64()) {
2604 CCInfo.AllocateStack(32, 8);
2607 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2608 if (CCInfo.getNextStackOffset()) {
2609 MachineFunction &MF = DAG.getMachineFunction();
2610 if (MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn())
2613 // Check if the arguments are already laid out in the right way as
2614 // the caller's fixed stack objects.
2615 MachineFrameInfo *MFI = MF.getFrameInfo();
2616 const MachineRegisterInfo *MRI = &MF.getRegInfo();
2617 const X86InstrInfo *TII =
2618 ((X86TargetMachine&)getTargetMachine()).getInstrInfo();
2619 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2620 CCValAssign &VA = ArgLocs[i];
2621 SDValue Arg = OutVals[i];
2622 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2623 if (VA.getLocInfo() == CCValAssign::Indirect)
2625 if (!VA.isRegLoc()) {
2626 if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags,
2633 // If the tailcall address may be in a register, then make sure it's
2634 // possible to register allocate for it. In 32-bit, the call address can
2635 // only target EAX, EDX, or ECX since the tail call must be scheduled after
2636 // callee-saved registers are restored. These happen to be the same
2637 // registers used to pass 'inreg' arguments so watch out for those.
2638 if (!Subtarget->is64Bit() &&
2639 !isa<GlobalAddressSDNode>(Callee) &&
2640 !isa<ExternalSymbolSDNode>(Callee)) {
2641 unsigned NumInRegs = 0;
2642 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2643 CCValAssign &VA = ArgLocs[i];
2646 unsigned Reg = VA.getLocReg();
2649 case X86::EAX: case X86::EDX: case X86::ECX:
2650 if (++NumInRegs == 3)
2658 // An stdcall caller is expected to clean up its arguments; the callee
2659 // isn't going to do that.
2660 if (!CCMatch && CallerCC==CallingConv::X86_StdCall)
2667 X86TargetLowering::createFastISel(FunctionLoweringInfo &funcInfo) const {
2668 return X86::createFastISel(funcInfo);
2672 //===----------------------------------------------------------------------===//
2673 // Other Lowering Hooks
2674 //===----------------------------------------------------------------------===//
2676 static bool MayFoldLoad(SDValue Op) {
2677 return Op.hasOneUse() && ISD::isNormalLoad(Op.getNode());
2680 static bool MayFoldIntoStore(SDValue Op) {
2681 return Op.hasOneUse() && ISD::isNormalStore(*Op.getNode()->use_begin());
2684 static bool isTargetShuffle(unsigned Opcode) {
2686 default: return false;
2687 case X86ISD::PSHUFD:
2688 case X86ISD::PSHUFHW:
2689 case X86ISD::PSHUFLW:
2690 case X86ISD::SHUFPD:
2691 case X86ISD::PALIGN:
2692 case X86ISD::SHUFPS:
2693 case X86ISD::MOVLHPS:
2694 case X86ISD::MOVLHPD:
2695 case X86ISD::MOVHLPS:
2696 case X86ISD::MOVLPS:
2697 case X86ISD::MOVLPD:
2698 case X86ISD::MOVSHDUP:
2699 case X86ISD::MOVSLDUP:
2700 case X86ISD::MOVDDUP:
2703 case X86ISD::UNPCKLPS:
2704 case X86ISD::UNPCKLPD:
2705 case X86ISD::VUNPCKLPS:
2706 case X86ISD::VUNPCKLPD:
2707 case X86ISD::VUNPCKLPSY:
2708 case X86ISD::VUNPCKLPDY:
2709 case X86ISD::PUNPCKLWD:
2710 case X86ISD::PUNPCKLBW:
2711 case X86ISD::PUNPCKLDQ:
2712 case X86ISD::PUNPCKLQDQ:
2713 case X86ISD::UNPCKHPS:
2714 case X86ISD::UNPCKHPD:
2715 case X86ISD::PUNPCKHWD:
2716 case X86ISD::PUNPCKHBW:
2717 case X86ISD::PUNPCKHDQ:
2718 case X86ISD::PUNPCKHQDQ:
2724 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2725 SDValue V1, SelectionDAG &DAG) {
2727 default: llvm_unreachable("Unknown x86 shuffle node");
2728 case X86ISD::MOVSHDUP:
2729 case X86ISD::MOVSLDUP:
2730 case X86ISD::MOVDDUP:
2731 return DAG.getNode(Opc, dl, VT, V1);
2737 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2738 SDValue V1, unsigned TargetMask, SelectionDAG &DAG) {
2740 default: llvm_unreachable("Unknown x86 shuffle node");
2741 case X86ISD::PSHUFD:
2742 case X86ISD::PSHUFHW:
2743 case X86ISD::PSHUFLW:
2744 return DAG.getNode(Opc, dl, VT, V1, DAG.getConstant(TargetMask, MVT::i8));
2750 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2751 SDValue V1, SDValue V2, unsigned TargetMask, SelectionDAG &DAG) {
2753 default: llvm_unreachable("Unknown x86 shuffle node");
2754 case X86ISD::PALIGN:
2755 case X86ISD::SHUFPD:
2756 case X86ISD::SHUFPS:
2757 return DAG.getNode(Opc, dl, VT, V1, V2,
2758 DAG.getConstant(TargetMask, MVT::i8));
2763 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2764 SDValue V1, SDValue V2, SelectionDAG &DAG) {
2766 default: llvm_unreachable("Unknown x86 shuffle node");
2767 case X86ISD::MOVLHPS:
2768 case X86ISD::MOVLHPD:
2769 case X86ISD::MOVHLPS:
2770 case X86ISD::MOVLPS:
2771 case X86ISD::MOVLPD:
2774 case X86ISD::UNPCKLPS:
2775 case X86ISD::UNPCKLPD:
2776 case X86ISD::VUNPCKLPS:
2777 case X86ISD::VUNPCKLPD:
2778 case X86ISD::VUNPCKLPSY:
2779 case X86ISD::VUNPCKLPDY:
2780 case X86ISD::PUNPCKLWD:
2781 case X86ISD::PUNPCKLBW:
2782 case X86ISD::PUNPCKLDQ:
2783 case X86ISD::PUNPCKLQDQ:
2784 case X86ISD::UNPCKHPS:
2785 case X86ISD::UNPCKHPD:
2786 case X86ISD::PUNPCKHWD:
2787 case X86ISD::PUNPCKHBW:
2788 case X86ISD::PUNPCKHDQ:
2789 case X86ISD::PUNPCKHQDQ:
2790 return DAG.getNode(Opc, dl, VT, V1, V2);
2795 SDValue X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) const {
2796 MachineFunction &MF = DAG.getMachineFunction();
2797 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
2798 int ReturnAddrIndex = FuncInfo->getRAIndex();
2800 if (ReturnAddrIndex == 0) {
2801 // Set up a frame object for the return address.
2802 uint64_t SlotSize = TD->getPointerSize();
2803 ReturnAddrIndex = MF.getFrameInfo()->CreateFixedObject(SlotSize, -SlotSize,
2805 FuncInfo->setRAIndex(ReturnAddrIndex);
2808 return DAG.getFrameIndex(ReturnAddrIndex, getPointerTy());
2812 bool X86::isOffsetSuitableForCodeModel(int64_t Offset, CodeModel::Model M,
2813 bool hasSymbolicDisplacement) {
2814 // Offset should fit into 32 bit immediate field.
2815 if (!isInt<32>(Offset))
2818 // If we don't have a symbolic displacement - we don't have any extra
2820 if (!hasSymbolicDisplacement)
2823 // FIXME: Some tweaks might be needed for medium code model.
2824 if (M != CodeModel::Small && M != CodeModel::Kernel)
2827 // For small code model we assume that latest object is 16MB before end of 31
2828 // bits boundary. We may also accept pretty large negative constants knowing
2829 // that all objects are in the positive half of address space.
2830 if (M == CodeModel::Small && Offset < 16*1024*1024)
2833 // For kernel code model we know that all object resist in the negative half
2834 // of 32bits address space. We may not accept negative offsets, since they may
2835 // be just off and we may accept pretty large positive ones.
2836 if (M == CodeModel::Kernel && Offset > 0)
2842 /// TranslateX86CC - do a one to one translation of a ISD::CondCode to the X86
2843 /// specific condition code, returning the condition code and the LHS/RHS of the
2844 /// comparison to make.
2845 static unsigned TranslateX86CC(ISD::CondCode SetCCOpcode, bool isFP,
2846 SDValue &LHS, SDValue &RHS, SelectionDAG &DAG) {
2848 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS)) {
2849 if (SetCCOpcode == ISD::SETGT && RHSC->isAllOnesValue()) {
2850 // X > -1 -> X == 0, jump !sign.
2851 RHS = DAG.getConstant(0, RHS.getValueType());
2852 return X86::COND_NS;
2853 } else if (SetCCOpcode == ISD::SETLT && RHSC->isNullValue()) {
2854 // X < 0 -> X == 0, jump on sign.
2856 } else if (SetCCOpcode == ISD::SETLT && RHSC->getZExtValue() == 1) {
2858 RHS = DAG.getConstant(0, RHS.getValueType());
2859 return X86::COND_LE;
2863 switch (SetCCOpcode) {
2864 default: llvm_unreachable("Invalid integer condition!");
2865 case ISD::SETEQ: return X86::COND_E;
2866 case ISD::SETGT: return X86::COND_G;
2867 case ISD::SETGE: return X86::COND_GE;
2868 case ISD::SETLT: return X86::COND_L;
2869 case ISD::SETLE: return X86::COND_LE;
2870 case ISD::SETNE: return X86::COND_NE;
2871 case ISD::SETULT: return X86::COND_B;
2872 case ISD::SETUGT: return X86::COND_A;
2873 case ISD::SETULE: return X86::COND_BE;
2874 case ISD::SETUGE: return X86::COND_AE;
2878 // First determine if it is required or is profitable to flip the operands.
2880 // If LHS is a foldable load, but RHS is not, flip the condition.
2881 if (ISD::isNON_EXTLoad(LHS.getNode()) &&
2882 !ISD::isNON_EXTLoad(RHS.getNode())) {
2883 SetCCOpcode = getSetCCSwappedOperands(SetCCOpcode);
2884 std::swap(LHS, RHS);
2887 switch (SetCCOpcode) {
2893 std::swap(LHS, RHS);
2897 // On a floating point condition, the flags are set as follows:
2899 // 0 | 0 | 0 | X > Y
2900 // 0 | 0 | 1 | X < Y
2901 // 1 | 0 | 0 | X == Y
2902 // 1 | 1 | 1 | unordered
2903 switch (SetCCOpcode) {
2904 default: llvm_unreachable("Condcode should be pre-legalized away");
2906 case ISD::SETEQ: return X86::COND_E;
2907 case ISD::SETOLT: // flipped
2909 case ISD::SETGT: return X86::COND_A;
2910 case ISD::SETOLE: // flipped
2912 case ISD::SETGE: return X86::COND_AE;
2913 case ISD::SETUGT: // flipped
2915 case ISD::SETLT: return X86::COND_B;
2916 case ISD::SETUGE: // flipped
2918 case ISD::SETLE: return X86::COND_BE;
2920 case ISD::SETNE: return X86::COND_NE;
2921 case ISD::SETUO: return X86::COND_P;
2922 case ISD::SETO: return X86::COND_NP;
2924 case ISD::SETUNE: return X86::COND_INVALID;
2928 /// hasFPCMov - is there a floating point cmov for the specific X86 condition
2929 /// code. Current x86 isa includes the following FP cmov instructions:
2930 /// fcmovb, fcomvbe, fcomve, fcmovu, fcmovae, fcmova, fcmovne, fcmovnu.
2931 static bool hasFPCMov(unsigned X86CC) {
2947 /// isFPImmLegal - Returns true if the target can instruction select the
2948 /// specified FP immediate natively. If false, the legalizer will
2949 /// materialize the FP immediate as a load from a constant pool.
2950 bool X86TargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
2951 for (unsigned i = 0, e = LegalFPImmediates.size(); i != e; ++i) {
2952 if (Imm.bitwiseIsEqual(LegalFPImmediates[i]))
2958 /// isUndefOrInRange - Return true if Val is undef or if its value falls within
2959 /// the specified range (L, H].
2960 static bool isUndefOrInRange(int Val, int Low, int Hi) {
2961 return (Val < 0) || (Val >= Low && Val < Hi);
2964 /// isUndefOrEqual - Val is either less than zero (undef) or equal to the
2965 /// specified value.
2966 static bool isUndefOrEqual(int Val, int CmpVal) {
2967 if (Val < 0 || Val == CmpVal)
2972 /// isPSHUFDMask - Return true if the node specifies a shuffle of elements that
2973 /// is suitable for input to PSHUFD or PSHUFW. That is, it doesn't reference
2974 /// the second operand.
2975 static bool isPSHUFDMask(const SmallVectorImpl<int> &Mask, EVT VT) {
2976 if (VT == MVT::v4f32 || VT == MVT::v4i32 )
2977 return (Mask[0] < 4 && Mask[1] < 4 && Mask[2] < 4 && Mask[3] < 4);
2978 if (VT == MVT::v2f64 || VT == MVT::v2i64)
2979 return (Mask[0] < 2 && Mask[1] < 2);
2983 bool X86::isPSHUFDMask(ShuffleVectorSDNode *N) {
2984 SmallVector<int, 8> M;
2986 return ::isPSHUFDMask(M, N->getValueType(0));
2989 /// isPSHUFHWMask - Return true if the node specifies a shuffle of elements that
2990 /// is suitable for input to PSHUFHW.
2991 static bool isPSHUFHWMask(const SmallVectorImpl<int> &Mask, EVT VT) {
2992 if (VT != MVT::v8i16)
2995 // Lower quadword copied in order or undef.
2996 for (int i = 0; i != 4; ++i)
2997 if (Mask[i] >= 0 && Mask[i] != i)
3000 // Upper quadword shuffled.
3001 for (int i = 4; i != 8; ++i)
3002 if (Mask[i] >= 0 && (Mask[i] < 4 || Mask[i] > 7))
3008 bool X86::isPSHUFHWMask(ShuffleVectorSDNode *N) {
3009 SmallVector<int, 8> M;
3011 return ::isPSHUFHWMask(M, N->getValueType(0));
3014 /// isPSHUFLWMask - Return true if the node specifies a shuffle of elements that
3015 /// is suitable for input to PSHUFLW.
3016 static bool isPSHUFLWMask(const SmallVectorImpl<int> &Mask, EVT VT) {
3017 if (VT != MVT::v8i16)
3020 // Upper quadword copied in order.
3021 for (int i = 4; i != 8; ++i)
3022 if (Mask[i] >= 0 && Mask[i] != i)
3025 // Lower quadword shuffled.
3026 for (int i = 0; i != 4; ++i)
3033 bool X86::isPSHUFLWMask(ShuffleVectorSDNode *N) {
3034 SmallVector<int, 8> M;
3036 return ::isPSHUFLWMask(M, N->getValueType(0));
3039 /// isPALIGNRMask - Return true if the node specifies a shuffle of elements that
3040 /// is suitable for input to PALIGNR.
3041 static bool isPALIGNRMask(const SmallVectorImpl<int> &Mask, EVT VT,
3043 int i, e = VT.getVectorNumElements();
3045 // Do not handle v2i64 / v2f64 shuffles with palignr.
3046 if (e < 4 || !hasSSSE3)
3049 for (i = 0; i != e; ++i)
3053 // All undef, not a palignr.
3057 // Determine if it's ok to perform a palignr with only the LHS, since we
3058 // don't have access to the actual shuffle elements to see if RHS is undef.
3059 bool Unary = Mask[i] < (int)e;
3060 bool NeedsUnary = false;
3062 int s = Mask[i] - i;
3064 // Check the rest of the elements to see if they are consecutive.
3065 for (++i; i != e; ++i) {
3070 Unary = Unary && (m < (int)e);
3071 NeedsUnary = NeedsUnary || (m < s);
3073 if (NeedsUnary && !Unary)
3075 if (Unary && m != ((s+i) & (e-1)))
3077 if (!Unary && m != (s+i))
3083 bool X86::isPALIGNRMask(ShuffleVectorSDNode *N) {
3084 SmallVector<int, 8> M;
3086 return ::isPALIGNRMask(M, N->getValueType(0), true);
3089 /// isSHUFPMask - Return true if the specified VECTOR_SHUFFLE operand
3090 /// specifies a shuffle of elements that is suitable for input to SHUFP*.
3091 static bool isSHUFPMask(const SmallVectorImpl<int> &Mask, EVT VT) {
3092 int NumElems = VT.getVectorNumElements();
3093 if (NumElems != 2 && NumElems != 4)
3096 int Half = NumElems / 2;
3097 for (int i = 0; i < Half; ++i)
3098 if (!isUndefOrInRange(Mask[i], 0, NumElems))
3100 for (int i = Half; i < NumElems; ++i)
3101 if (!isUndefOrInRange(Mask[i], NumElems, NumElems*2))
3107 bool X86::isSHUFPMask(ShuffleVectorSDNode *N) {
3108 SmallVector<int, 8> M;
3110 return ::isSHUFPMask(M, N->getValueType(0));
3113 /// isCommutedSHUFP - Returns true if the shuffle mask is exactly
3114 /// the reverse of what x86 shuffles want. x86 shuffles requires the lower
3115 /// half elements to come from vector 1 (which would equal the dest.) and
3116 /// the upper half to come from vector 2.
3117 static bool isCommutedSHUFPMask(const SmallVectorImpl<int> &Mask, EVT VT) {
3118 int NumElems = VT.getVectorNumElements();
3120 if (NumElems != 2 && NumElems != 4)
3123 int Half = NumElems / 2;
3124 for (int i = 0; i < Half; ++i)
3125 if (!isUndefOrInRange(Mask[i], NumElems, NumElems*2))
3127 for (int i = Half; i < NumElems; ++i)
3128 if (!isUndefOrInRange(Mask[i], 0, NumElems))
3133 static bool isCommutedSHUFP(ShuffleVectorSDNode *N) {
3134 SmallVector<int, 8> M;
3136 return isCommutedSHUFPMask(M, N->getValueType(0));
3139 /// isMOVHLPSMask - Return true if the specified VECTOR_SHUFFLE operand
3140 /// specifies a shuffle of elements that is suitable for input to MOVHLPS.
3141 bool X86::isMOVHLPSMask(ShuffleVectorSDNode *N) {
3142 if (N->getValueType(0).getVectorNumElements() != 4)
3145 // Expect bit0 == 6, bit1 == 7, bit2 == 2, bit3 == 3
3146 return isUndefOrEqual(N->getMaskElt(0), 6) &&
3147 isUndefOrEqual(N->getMaskElt(1), 7) &&
3148 isUndefOrEqual(N->getMaskElt(2), 2) &&
3149 isUndefOrEqual(N->getMaskElt(3), 3);
3152 /// isMOVHLPS_v_undef_Mask - Special case of isMOVHLPSMask for canonical form
3153 /// of vector_shuffle v, v, <2, 3, 2, 3>, i.e. vector_shuffle v, undef,
3155 bool X86::isMOVHLPS_v_undef_Mask(ShuffleVectorSDNode *N) {
3156 unsigned NumElems = N->getValueType(0).getVectorNumElements();
3161 return isUndefOrEqual(N->getMaskElt(0), 2) &&
3162 isUndefOrEqual(N->getMaskElt(1), 3) &&
3163 isUndefOrEqual(N->getMaskElt(2), 2) &&
3164 isUndefOrEqual(N->getMaskElt(3), 3);
3167 /// isMOVLPMask - Return true if the specified VECTOR_SHUFFLE operand
3168 /// specifies a shuffle of elements that is suitable for input to MOVLP{S|D}.
3169 bool X86::isMOVLPMask(ShuffleVectorSDNode *N) {
3170 unsigned NumElems = N->getValueType(0).getVectorNumElements();
3172 if (NumElems != 2 && NumElems != 4)
3175 for (unsigned i = 0; i < NumElems/2; ++i)
3176 if (!isUndefOrEqual(N->getMaskElt(i), i + NumElems))
3179 for (unsigned i = NumElems/2; i < NumElems; ++i)
3180 if (!isUndefOrEqual(N->getMaskElt(i), i))
3186 /// isMOVLHPSMask - Return true if the specified VECTOR_SHUFFLE operand
3187 /// specifies a shuffle of elements that is suitable for input to MOVLHPS.
3188 bool X86::isMOVLHPSMask(ShuffleVectorSDNode *N) {
3189 unsigned NumElems = N->getValueType(0).getVectorNumElements();
3191 if ((NumElems != 2 && NumElems != 4)
3192 || N->getValueType(0).getSizeInBits() > 128)
3195 for (unsigned i = 0; i < NumElems/2; ++i)
3196 if (!isUndefOrEqual(N->getMaskElt(i), i))
3199 for (unsigned i = 0; i < NumElems/2; ++i)
3200 if (!isUndefOrEqual(N->getMaskElt(i + NumElems/2), i + NumElems))
3206 /// isUNPCKLMask - Return true if the specified VECTOR_SHUFFLE operand
3207 /// specifies a shuffle of elements that is suitable for input to UNPCKL.
3208 static bool isUNPCKLMask(const SmallVectorImpl<int> &Mask, EVT VT,
3209 bool V2IsSplat = false) {
3210 int NumElts = VT.getVectorNumElements();
3211 if (NumElts != 2 && NumElts != 4 && NumElts != 8 && NumElts != 16)
3214 // Handle vector lengths > 128 bits. Define a "section" as a set of
3215 // 128 bits. AVX defines UNPCK* to operate independently on 128-bit
3217 unsigned NumSections = VT.getSizeInBits() / 128;
3218 if (NumSections == 0 ) NumSections = 1; // Handle MMX
3219 unsigned NumSectionElts = NumElts / NumSections;
3222 unsigned End = NumSectionElts;
3223 for (unsigned s = 0; s < NumSections; ++s) {
3224 for (unsigned i = Start, j = s * NumSectionElts;
3228 int BitI1 = Mask[i+1];
3229 if (!isUndefOrEqual(BitI, j))
3232 if (!isUndefOrEqual(BitI1, NumElts))
3235 if (!isUndefOrEqual(BitI1, j + NumElts))
3239 // Process the next 128 bits.
3240 Start += NumSectionElts;
3241 End += NumSectionElts;
3247 bool X86::isUNPCKLMask(ShuffleVectorSDNode *N, bool V2IsSplat) {
3248 SmallVector<int, 8> M;
3250 return ::isUNPCKLMask(M, N->getValueType(0), V2IsSplat);
3253 /// isUNPCKHMask - Return true if the specified VECTOR_SHUFFLE operand
3254 /// specifies a shuffle of elements that is suitable for input to UNPCKH.
3255 static bool isUNPCKHMask(const SmallVectorImpl<int> &Mask, EVT VT,
3256 bool V2IsSplat = false) {
3257 int NumElts = VT.getVectorNumElements();
3258 if (NumElts != 2 && NumElts != 4 && NumElts != 8 && NumElts != 16)
3261 for (int i = 0, j = 0; i != NumElts; i += 2, ++j) {
3263 int BitI1 = Mask[i+1];
3264 if (!isUndefOrEqual(BitI, j + NumElts/2))
3267 if (isUndefOrEqual(BitI1, NumElts))
3270 if (!isUndefOrEqual(BitI1, j + NumElts/2 + NumElts))
3277 bool X86::isUNPCKHMask(ShuffleVectorSDNode *N, bool V2IsSplat) {
3278 SmallVector<int, 8> M;
3280 return ::isUNPCKHMask(M, N->getValueType(0), V2IsSplat);
3283 /// isUNPCKL_v_undef_Mask - Special case of isUNPCKLMask for canonical form
3284 /// of vector_shuffle v, v, <0, 4, 1, 5>, i.e. vector_shuffle v, undef,
3286 static bool isUNPCKL_v_undef_Mask(const SmallVectorImpl<int> &Mask, EVT VT) {
3287 int NumElems = VT.getVectorNumElements();
3288 if (NumElems != 2 && NumElems != 4 && NumElems != 8 && NumElems != 16)
3291 // Handle vector lengths > 128 bits. Define a "section" as a set of
3292 // 128 bits. AVX defines UNPCK* to operate independently on 128-bit
3294 unsigned NumSections = VT.getSizeInBits() / 128;
3295 if (NumSections == 0 ) NumSections = 1; // Handle MMX
3296 unsigned NumSectionElts = NumElems / NumSections;
3298 for (unsigned s = 0; s < NumSections; ++s) {
3299 for (unsigned i = s * NumSectionElts, j = s * NumSectionElts;
3300 i != NumSectionElts * (s + 1);
3303 int BitI1 = Mask[i+1];
3305 if (!isUndefOrEqual(BitI, j))
3307 if (!isUndefOrEqual(BitI1, j))
3315 bool X86::isUNPCKL_v_undef_Mask(ShuffleVectorSDNode *N) {
3316 SmallVector<int, 8> M;
3318 return ::isUNPCKL_v_undef_Mask(M, N->getValueType(0));
3321 /// isUNPCKH_v_undef_Mask - Special case of isUNPCKHMask for canonical form
3322 /// of vector_shuffle v, v, <2, 6, 3, 7>, i.e. vector_shuffle v, undef,
3324 static bool isUNPCKH_v_undef_Mask(const SmallVectorImpl<int> &Mask, EVT VT) {
3325 int NumElems = VT.getVectorNumElements();
3326 if (NumElems != 2 && NumElems != 4 && NumElems != 8 && NumElems != 16)
3329 for (int i = 0, j = NumElems / 2; i != NumElems; i += 2, ++j) {
3331 int BitI1 = Mask[i+1];
3332 if (!isUndefOrEqual(BitI, j))
3334 if (!isUndefOrEqual(BitI1, j))
3340 bool X86::isUNPCKH_v_undef_Mask(ShuffleVectorSDNode *N) {
3341 SmallVector<int, 8> M;
3343 return ::isUNPCKH_v_undef_Mask(M, N->getValueType(0));
3346 /// isMOVLMask - Return true if the specified VECTOR_SHUFFLE operand
3347 /// specifies a shuffle of elements that is suitable for input to MOVSS,
3348 /// MOVSD, and MOVD, i.e. setting the lowest element.
3349 static bool isMOVLMask(const SmallVectorImpl<int> &Mask, EVT VT) {
3350 if (VT.getVectorElementType().getSizeInBits() < 32)
3353 int NumElts = VT.getVectorNumElements();
3355 if (!isUndefOrEqual(Mask[0], NumElts))
3358 for (int i = 1; i < NumElts; ++i)
3359 if (!isUndefOrEqual(Mask[i], i))
3365 bool X86::isMOVLMask(ShuffleVectorSDNode *N) {
3366 SmallVector<int, 8> M;
3368 return ::isMOVLMask(M, N->getValueType(0));
3371 /// isCommutedMOVL - Returns true if the shuffle mask is except the reverse
3372 /// of what x86 movss want. X86 movs requires the lowest element to be lowest
3373 /// element of vector 2 and the other elements to come from vector 1 in order.
3374 static bool isCommutedMOVLMask(const SmallVectorImpl<int> &Mask, EVT VT,
3375 bool V2IsSplat = false, bool V2IsUndef = false) {
3376 int NumOps = VT.getVectorNumElements();
3377 if (NumOps != 2 && NumOps != 4 && NumOps != 8 && NumOps != 16)
3380 if (!isUndefOrEqual(Mask[0], 0))
3383 for (int i = 1; i < NumOps; ++i)
3384 if (!(isUndefOrEqual(Mask[i], i+NumOps) ||
3385 (V2IsUndef && isUndefOrInRange(Mask[i], NumOps, NumOps*2)) ||
3386 (V2IsSplat && isUndefOrEqual(Mask[i], NumOps))))
3392 static bool isCommutedMOVL(ShuffleVectorSDNode *N, bool V2IsSplat = false,
3393 bool V2IsUndef = false) {
3394 SmallVector<int, 8> M;
3396 return isCommutedMOVLMask(M, N->getValueType(0), V2IsSplat, V2IsUndef);
3399 /// isMOVSHDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3400 /// specifies a shuffle of elements that is suitable for input to MOVSHDUP.
3401 bool X86::isMOVSHDUPMask(ShuffleVectorSDNode *N) {
3402 if (N->getValueType(0).getVectorNumElements() != 4)
3405 // Expect 1, 1, 3, 3
3406 for (unsigned i = 0; i < 2; ++i) {
3407 int Elt = N->getMaskElt(i);
3408 if (Elt >= 0 && Elt != 1)
3413 for (unsigned i = 2; i < 4; ++i) {
3414 int Elt = N->getMaskElt(i);
3415 if (Elt >= 0 && Elt != 3)
3420 // Don't use movshdup if it can be done with a shufps.
3421 // FIXME: verify that matching u, u, 3, 3 is what we want.
3425 /// isMOVSLDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3426 /// specifies a shuffle of elements that is suitable for input to MOVSLDUP.
3427 bool X86::isMOVSLDUPMask(ShuffleVectorSDNode *N) {
3428 if (N->getValueType(0).getVectorNumElements() != 4)
3431 // Expect 0, 0, 2, 2
3432 for (unsigned i = 0; i < 2; ++i)
3433 if (N->getMaskElt(i) > 0)
3437 for (unsigned i = 2; i < 4; ++i) {
3438 int Elt = N->getMaskElt(i);
3439 if (Elt >= 0 && Elt != 2)
3444 // Don't use movsldup if it can be done with a shufps.
3448 /// isMOVDDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3449 /// specifies a shuffle of elements that is suitable for input to MOVDDUP.
3450 bool X86::isMOVDDUPMask(ShuffleVectorSDNode *N) {
3451 int e = N->getValueType(0).getVectorNumElements() / 2;
3453 for (int i = 0; i < e; ++i)
3454 if (!isUndefOrEqual(N->getMaskElt(i), i))
3456 for (int i = 0; i < e; ++i)
3457 if (!isUndefOrEqual(N->getMaskElt(e+i), i))
3462 /// isVEXTRACTF128Index - Return true if the specified
3463 /// EXTRACT_SUBVECTOR operand specifies a vector extract that is
3464 /// suitable for input to VEXTRACTF128.
3465 bool X86::isVEXTRACTF128Index(SDNode *N) {
3466 if (!isa<ConstantSDNode>(N->getOperand(1).getNode()))
3469 // The index should be aligned on a 128-bit boundary.
3471 cast<ConstantSDNode>(N->getOperand(1).getNode())->getZExtValue();
3473 unsigned VL = N->getValueType(0).getVectorNumElements();
3474 unsigned VBits = N->getValueType(0).getSizeInBits();
3475 unsigned ElSize = VBits / VL;
3476 bool Result = (Index * ElSize) % 128 == 0;
3481 /// isVINSERTF128Index - Return true if the specified INSERT_SUBVECTOR
3482 /// operand specifies a subvector insert that is suitable for input to
3484 bool X86::isVINSERTF128Index(SDNode *N) {
3485 if (!isa<ConstantSDNode>(N->getOperand(2).getNode()))
3488 // The index should be aligned on a 128-bit boundary.
3490 cast<ConstantSDNode>(N->getOperand(2).getNode())->getZExtValue();
3492 unsigned VL = N->getValueType(0).getVectorNumElements();
3493 unsigned VBits = N->getValueType(0).getSizeInBits();
3494 unsigned ElSize = VBits / VL;
3495 bool Result = (Index * ElSize) % 128 == 0;
3500 /// getShuffleSHUFImmediate - Return the appropriate immediate to shuffle
3501 /// the specified VECTOR_SHUFFLE mask with PSHUF* and SHUFP* instructions.
3502 unsigned X86::getShuffleSHUFImmediate(SDNode *N) {
3503 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
3504 int NumOperands = SVOp->getValueType(0).getVectorNumElements();
3506 unsigned Shift = (NumOperands == 4) ? 2 : 1;
3508 for (int i = 0; i < NumOperands; ++i) {
3509 int Val = SVOp->getMaskElt(NumOperands-i-1);
3510 if (Val < 0) Val = 0;
3511 if (Val >= NumOperands) Val -= NumOperands;
3513 if (i != NumOperands - 1)
3519 /// getShufflePSHUFHWImmediate - Return the appropriate immediate to shuffle
3520 /// the specified VECTOR_SHUFFLE mask with the PSHUFHW instruction.
3521 unsigned X86::getShufflePSHUFHWImmediate(SDNode *N) {
3522 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
3524 // 8 nodes, but we only care about the last 4.
3525 for (unsigned i = 7; i >= 4; --i) {
3526 int Val = SVOp->getMaskElt(i);
3535 /// getShufflePSHUFLWImmediate - Return the appropriate immediate to shuffle
3536 /// the specified VECTOR_SHUFFLE mask with the PSHUFLW instruction.
3537 unsigned X86::getShufflePSHUFLWImmediate(SDNode *N) {
3538 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
3540 // 8 nodes, but we only care about the first 4.
3541 for (int i = 3; i >= 0; --i) {
3542 int Val = SVOp->getMaskElt(i);
3551 /// getShufflePALIGNRImmediate - Return the appropriate immediate to shuffle
3552 /// the specified VECTOR_SHUFFLE mask with the PALIGNR instruction.
3553 unsigned X86::getShufflePALIGNRImmediate(SDNode *N) {
3554 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
3555 EVT VVT = N->getValueType(0);
3556 unsigned EltSize = VVT.getVectorElementType().getSizeInBits() >> 3;
3560 for (i = 0, e = VVT.getVectorNumElements(); i != e; ++i) {
3561 Val = SVOp->getMaskElt(i);
3565 return (Val - i) * EltSize;
3568 /// getExtractVEXTRACTF128Immediate - Return the appropriate immediate
3569 /// to extract the specified EXTRACT_SUBVECTOR index with VEXTRACTF128
3571 unsigned X86::getExtractVEXTRACTF128Immediate(SDNode *N) {
3572 if (!isa<ConstantSDNode>(N->getOperand(1).getNode()))
3573 llvm_unreachable("Illegal extract subvector for VEXTRACTF128");
3576 cast<ConstantSDNode>(N->getOperand(1).getNode())->getZExtValue();
3578 EVT VecVT = N->getOperand(0).getValueType();
3579 EVT ElVT = VecVT.getVectorElementType();
3581 unsigned NumElemsPerChunk = 128 / ElVT.getSizeInBits();
3583 return Index / NumElemsPerChunk;
3586 /// getInsertVINSERTF128Immediate - Return the appropriate immediate
3587 /// to insert at the specified INSERT_SUBVECTOR index with VINSERTF128
3589 unsigned X86::getInsertVINSERTF128Immediate(SDNode *N) {
3590 if (!isa<ConstantSDNode>(N->getOperand(2).getNode()))
3591 llvm_unreachable("Illegal insert subvector for VINSERTF128");
3594 cast<ConstantSDNode>(N->getOperand(2).getNode())->getZExtValue();
3596 EVT VecVT = N->getValueType(0);
3597 EVT ElVT = VecVT.getVectorElementType();
3599 unsigned NumElemsPerChunk = 128 / ElVT.getSizeInBits();
3601 return Index / NumElemsPerChunk;
3604 /// isZeroNode - Returns true if Elt is a constant zero or a floating point
3606 bool X86::isZeroNode(SDValue Elt) {
3607 return ((isa<ConstantSDNode>(Elt) &&
3608 cast<ConstantSDNode>(Elt)->isNullValue()) ||
3609 (isa<ConstantFPSDNode>(Elt) &&
3610 cast<ConstantFPSDNode>(Elt)->getValueAPF().isPosZero()));
3613 /// CommuteVectorShuffle - Swap vector_shuffle operands as well as values in
3614 /// their permute mask.
3615 static SDValue CommuteVectorShuffle(ShuffleVectorSDNode *SVOp,
3616 SelectionDAG &DAG) {
3617 EVT VT = SVOp->getValueType(0);
3618 unsigned NumElems = VT.getVectorNumElements();
3619 SmallVector<int, 8> MaskVec;
3621 for (unsigned i = 0; i != NumElems; ++i) {
3622 int idx = SVOp->getMaskElt(i);
3624 MaskVec.push_back(idx);
3625 else if (idx < (int)NumElems)
3626 MaskVec.push_back(idx + NumElems);
3628 MaskVec.push_back(idx - NumElems);
3630 return DAG.getVectorShuffle(VT, SVOp->getDebugLoc(), SVOp->getOperand(1),
3631 SVOp->getOperand(0), &MaskVec[0]);
3634 /// CommuteVectorShuffleMask - Change values in a shuffle permute mask assuming
3635 /// the two vector operands have swapped position.
3636 static void CommuteVectorShuffleMask(SmallVectorImpl<int> &Mask, EVT VT) {
3637 unsigned NumElems = VT.getVectorNumElements();
3638 for (unsigned i = 0; i != NumElems; ++i) {
3642 else if (idx < (int)NumElems)
3643 Mask[i] = idx + NumElems;
3645 Mask[i] = idx - NumElems;
3649 /// ShouldXformToMOVHLPS - Return true if the node should be transformed to
3650 /// match movhlps. The lower half elements should come from upper half of
3651 /// V1 (and in order), and the upper half elements should come from the upper
3652 /// half of V2 (and in order).
3653 static bool ShouldXformToMOVHLPS(ShuffleVectorSDNode *Op) {
3654 if (Op->getValueType(0).getVectorNumElements() != 4)
3656 for (unsigned i = 0, e = 2; i != e; ++i)
3657 if (!isUndefOrEqual(Op->getMaskElt(i), i+2))
3659 for (unsigned i = 2; i != 4; ++i)
3660 if (!isUndefOrEqual(Op->getMaskElt(i), i+4))
3665 /// isScalarLoadToVector - Returns true if the node is a scalar load that
3666 /// is promoted to a vector. It also returns the LoadSDNode by reference if
3668 static bool isScalarLoadToVector(SDNode *N, LoadSDNode **LD = NULL) {
3669 if (N->getOpcode() != ISD::SCALAR_TO_VECTOR)
3671 N = N->getOperand(0).getNode();
3672 if (!ISD::isNON_EXTLoad(N))
3675 *LD = cast<LoadSDNode>(N);
3679 /// ShouldXformToMOVLP{S|D} - Return true if the node should be transformed to
3680 /// match movlp{s|d}. The lower half elements should come from lower half of
3681 /// V1 (and in order), and the upper half elements should come from the upper
3682 /// half of V2 (and in order). And since V1 will become the source of the
3683 /// MOVLP, it must be either a vector load or a scalar load to vector.
3684 static bool ShouldXformToMOVLP(SDNode *V1, SDNode *V2,
3685 ShuffleVectorSDNode *Op) {
3686 if (!ISD::isNON_EXTLoad(V1) && !isScalarLoadToVector(V1))
3688 // Is V2 is a vector load, don't do this transformation. We will try to use
3689 // load folding shufps op.
3690 if (ISD::isNON_EXTLoad(V2))
3693 unsigned NumElems = Op->getValueType(0).getVectorNumElements();
3695 if (NumElems != 2 && NumElems != 4)
3697 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
3698 if (!isUndefOrEqual(Op->getMaskElt(i), i))
3700 for (unsigned i = NumElems/2; i != NumElems; ++i)
3701 if (!isUndefOrEqual(Op->getMaskElt(i), i+NumElems))
3706 /// isSplatVector - Returns true if N is a BUILD_VECTOR node whose elements are
3708 static bool isSplatVector(SDNode *N) {
3709 if (N->getOpcode() != ISD::BUILD_VECTOR)
3712 SDValue SplatValue = N->getOperand(0);
3713 for (unsigned i = 1, e = N->getNumOperands(); i != e; ++i)
3714 if (N->getOperand(i) != SplatValue)
3719 /// isZeroShuffle - Returns true if N is a VECTOR_SHUFFLE that can be resolved
3720 /// to an zero vector.
3721 /// FIXME: move to dag combiner / method on ShuffleVectorSDNode
3722 static bool isZeroShuffle(ShuffleVectorSDNode *N) {
3723 SDValue V1 = N->getOperand(0);
3724 SDValue V2 = N->getOperand(1);
3725 unsigned NumElems = N->getValueType(0).getVectorNumElements();
3726 for (unsigned i = 0; i != NumElems; ++i) {
3727 int Idx = N->getMaskElt(i);
3728 if (Idx >= (int)NumElems) {
3729 unsigned Opc = V2.getOpcode();
3730 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V2.getNode()))
3732 if (Opc != ISD::BUILD_VECTOR ||
3733 !X86::isZeroNode(V2.getOperand(Idx-NumElems)))
3735 } else if (Idx >= 0) {
3736 unsigned Opc = V1.getOpcode();
3737 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V1.getNode()))
3739 if (Opc != ISD::BUILD_VECTOR ||
3740 !X86::isZeroNode(V1.getOperand(Idx)))
3747 /// getZeroVector - Returns a vector of specified type with all zero elements.
3749 static SDValue getZeroVector(EVT VT, bool HasSSE2, SelectionDAG &DAG,
3751 assert(VT.isVector() && "Expected a vector type");
3753 // Always build SSE zero vectors as <4 x i32> bitcasted
3754 // to their dest type. This ensures they get CSE'd.
3756 if (VT.getSizeInBits() == 128) { // SSE
3757 if (HasSSE2) { // SSE2
3758 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
3759 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
3761 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
3762 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4f32, Cst, Cst, Cst, Cst);
3764 } else if (VT.getSizeInBits() == 256) { // AVX
3765 // 256-bit logic and arithmetic instructions in AVX are
3766 // all floating-point, no support for integer ops. Default
3767 // to emitting fp zeroed vectors then.
3768 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
3769 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
3770 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8f32, Ops, 8);
3772 return DAG.getNode(ISD::BITCAST, dl, VT, Vec);
3775 /// getOnesVector - Returns a vector of specified type with all bits set.
3777 static SDValue getOnesVector(EVT VT, SelectionDAG &DAG, DebugLoc dl) {
3778 assert(VT.isVector() && "Expected a vector type");
3780 // Always build ones vectors as <4 x i32> or <2 x i32> bitcasted to their dest
3781 // type. This ensures they get CSE'd.
3782 SDValue Cst = DAG.getTargetConstant(~0U, MVT::i32);
3784 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
3785 return DAG.getNode(ISD::BITCAST, dl, VT, Vec);
3789 /// NormalizeMask - V2 is a splat, modify the mask (if needed) so all elements
3790 /// that point to V2 points to its first element.
3791 static SDValue NormalizeMask(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
3792 EVT VT = SVOp->getValueType(0);
3793 unsigned NumElems = VT.getVectorNumElements();
3795 bool Changed = false;
3796 SmallVector<int, 8> MaskVec;
3797 SVOp->getMask(MaskVec);
3799 for (unsigned i = 0; i != NumElems; ++i) {
3800 if (MaskVec[i] > (int)NumElems) {
3801 MaskVec[i] = NumElems;
3806 return DAG.getVectorShuffle(VT, SVOp->getDebugLoc(), SVOp->getOperand(0),
3807 SVOp->getOperand(1), &MaskVec[0]);
3808 return SDValue(SVOp, 0);
3811 /// getMOVLMask - Returns a vector_shuffle mask for an movs{s|d}, movd
3812 /// operation of specified width.
3813 static SDValue getMOVL(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
3815 unsigned NumElems = VT.getVectorNumElements();
3816 SmallVector<int, 8> Mask;
3817 Mask.push_back(NumElems);
3818 for (unsigned i = 1; i != NumElems; ++i)
3820 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
3823 /// getUnpackl - Returns a vector_shuffle node for an unpackl operation.
3824 static SDValue getUnpackl(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
3826 unsigned NumElems = VT.getVectorNumElements();
3827 SmallVector<int, 8> Mask;
3828 for (unsigned i = 0, e = NumElems/2; i != e; ++i) {
3830 Mask.push_back(i + NumElems);
3832 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
3835 /// getUnpackhMask - Returns a vector_shuffle node for an unpackh operation.
3836 static SDValue getUnpackh(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
3838 unsigned NumElems = VT.getVectorNumElements();
3839 unsigned Half = NumElems/2;
3840 SmallVector<int, 8> Mask;
3841 for (unsigned i = 0; i != Half; ++i) {
3842 Mask.push_back(i + Half);
3843 Mask.push_back(i + NumElems + Half);
3845 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
3848 /// PromoteSplat - Promote a splat of v4i32, v8i16 or v16i8 to v4f32.
3849 static SDValue PromoteSplat(ShuffleVectorSDNode *SV, SelectionDAG &DAG) {
3850 EVT PVT = MVT::v4f32;
3851 EVT VT = SV->getValueType(0);
3852 DebugLoc dl = SV->getDebugLoc();
3853 SDValue V1 = SV->getOperand(0);
3854 int NumElems = VT.getVectorNumElements();
3855 int EltNo = SV->getSplatIndex();
3857 // unpack elements to the correct location
3858 while (NumElems > 4) {
3859 if (EltNo < NumElems/2) {
3860 V1 = getUnpackl(DAG, dl, VT, V1, V1);
3862 V1 = getUnpackh(DAG, dl, VT, V1, V1);
3863 EltNo -= NumElems/2;
3868 // Perform the splat.
3869 int SplatMask[4] = { EltNo, EltNo, EltNo, EltNo };
3870 V1 = DAG.getNode(ISD::BITCAST, dl, PVT, V1);
3871 V1 = DAG.getVectorShuffle(PVT, dl, V1, DAG.getUNDEF(PVT), &SplatMask[0]);
3872 return DAG.getNode(ISD::BITCAST, dl, VT, V1);
3875 /// getShuffleVectorZeroOrUndef - Return a vector_shuffle of the specified
3876 /// vector of zero or undef vector. This produces a shuffle where the low
3877 /// element of V2 is swizzled into the zero/undef vector, landing at element
3878 /// Idx. This produces a shuffle mask like 4,1,2,3 (idx=0) or 0,1,2,4 (idx=3).
3879 static SDValue getShuffleVectorZeroOrUndef(SDValue V2, unsigned Idx,
3880 bool isZero, bool HasSSE2,
3881 SelectionDAG &DAG) {
3882 EVT VT = V2.getValueType();
3884 ? getZeroVector(VT, HasSSE2, DAG, V2.getDebugLoc()) : DAG.getUNDEF(VT);
3885 unsigned NumElems = VT.getVectorNumElements();
3886 SmallVector<int, 16> MaskVec;
3887 for (unsigned i = 0; i != NumElems; ++i)
3888 // If this is the insertion idx, put the low elt of V2 here.
3889 MaskVec.push_back(i == Idx ? NumElems : i);
3890 return DAG.getVectorShuffle(VT, V2.getDebugLoc(), V1, V2, &MaskVec[0]);
3893 /// getShuffleScalarElt - Returns the scalar element that will make up the ith
3894 /// element of the result of the vector shuffle.
3895 static SDValue getShuffleScalarElt(SDNode *N, int Index, SelectionDAG &DAG,
3898 return SDValue(); // Limit search depth.
3900 SDValue V = SDValue(N, 0);
3901 EVT VT = V.getValueType();
3902 unsigned Opcode = V.getOpcode();
3904 // Recurse into ISD::VECTOR_SHUFFLE node to find scalars.
3905 if (const ShuffleVectorSDNode *SV = dyn_cast<ShuffleVectorSDNode>(N)) {
3906 Index = SV->getMaskElt(Index);
3909 return DAG.getUNDEF(VT.getVectorElementType());
3911 int NumElems = VT.getVectorNumElements();
3912 SDValue NewV = (Index < NumElems) ? SV->getOperand(0) : SV->getOperand(1);
3913 return getShuffleScalarElt(NewV.getNode(), Index % NumElems, DAG, Depth+1);
3916 // Recurse into target specific vector shuffles to find scalars.
3917 if (isTargetShuffle(Opcode)) {
3918 int NumElems = VT.getVectorNumElements();
3919 SmallVector<unsigned, 16> ShuffleMask;
3923 case X86ISD::SHUFPS:
3924 case X86ISD::SHUFPD:
3925 ImmN = N->getOperand(N->getNumOperands()-1);
3926 DecodeSHUFPSMask(NumElems,
3927 cast<ConstantSDNode>(ImmN)->getZExtValue(),
3930 case X86ISD::PUNPCKHBW:
3931 case X86ISD::PUNPCKHWD:
3932 case X86ISD::PUNPCKHDQ:
3933 case X86ISD::PUNPCKHQDQ:
3934 DecodePUNPCKHMask(NumElems, ShuffleMask);
3936 case X86ISD::UNPCKHPS:
3937 case X86ISD::UNPCKHPD:
3938 DecodeUNPCKHPMask(NumElems, ShuffleMask);
3940 case X86ISD::PUNPCKLBW:
3941 case X86ISD::PUNPCKLWD:
3942 case X86ISD::PUNPCKLDQ:
3943 case X86ISD::PUNPCKLQDQ:
3944 DecodePUNPCKLMask(VT, ShuffleMask);
3946 case X86ISD::UNPCKLPS:
3947 case X86ISD::UNPCKLPD:
3948 case X86ISD::VUNPCKLPS:
3949 case X86ISD::VUNPCKLPD:
3950 case X86ISD::VUNPCKLPSY:
3951 case X86ISD::VUNPCKLPDY:
3952 DecodeUNPCKLPMask(VT, ShuffleMask);
3954 case X86ISD::MOVHLPS:
3955 DecodeMOVHLPSMask(NumElems, ShuffleMask);
3957 case X86ISD::MOVLHPS:
3958 DecodeMOVLHPSMask(NumElems, ShuffleMask);
3960 case X86ISD::PSHUFD:
3961 ImmN = N->getOperand(N->getNumOperands()-1);
3962 DecodePSHUFMask(NumElems,
3963 cast<ConstantSDNode>(ImmN)->getZExtValue(),
3966 case X86ISD::PSHUFHW:
3967 ImmN = N->getOperand(N->getNumOperands()-1);
3968 DecodePSHUFHWMask(cast<ConstantSDNode>(ImmN)->getZExtValue(),
3971 case X86ISD::PSHUFLW:
3972 ImmN = N->getOperand(N->getNumOperands()-1);
3973 DecodePSHUFLWMask(cast<ConstantSDNode>(ImmN)->getZExtValue(),
3977 case X86ISD::MOVSD: {
3978 // The index 0 always comes from the first element of the second source,
3979 // this is why MOVSS and MOVSD are used in the first place. The other
3980 // elements come from the other positions of the first source vector.
3981 unsigned OpNum = (Index == 0) ? 1 : 0;
3982 return getShuffleScalarElt(V.getOperand(OpNum).getNode(), Index, DAG,
3986 assert("not implemented for target shuffle node");
3990 Index = ShuffleMask[Index];
3992 return DAG.getUNDEF(VT.getVectorElementType());
3994 SDValue NewV = (Index < NumElems) ? N->getOperand(0) : N->getOperand(1);
3995 return getShuffleScalarElt(NewV.getNode(), Index % NumElems, DAG,
3999 // Actual nodes that may contain scalar elements
4000 if (Opcode == ISD::BITCAST) {
4001 V = V.getOperand(0);
4002 EVT SrcVT = V.getValueType();
4003 unsigned NumElems = VT.getVectorNumElements();
4005 if (!SrcVT.isVector() || SrcVT.getVectorNumElements() != NumElems)
4009 if (V.getOpcode() == ISD::SCALAR_TO_VECTOR)
4010 return (Index == 0) ? V.getOperand(0)
4011 : DAG.getUNDEF(VT.getVectorElementType());
4013 if (V.getOpcode() == ISD::BUILD_VECTOR)
4014 return V.getOperand(Index);
4019 /// getNumOfConsecutiveZeros - Return the number of elements of a vector
4020 /// shuffle operation which come from a consecutively from a zero. The
4021 /// search can start in two diferent directions, from left or right.
4023 unsigned getNumOfConsecutiveZeros(SDNode *N, int NumElems,
4024 bool ZerosFromLeft, SelectionDAG &DAG) {
4027 while (i < NumElems) {
4028 unsigned Index = ZerosFromLeft ? i : NumElems-i-1;
4029 SDValue Elt = getShuffleScalarElt(N, Index, DAG, 0);
4030 if (!(Elt.getNode() &&
4031 (Elt.getOpcode() == ISD::UNDEF || X86::isZeroNode(Elt))))
4039 /// isShuffleMaskConsecutive - Check if the shuffle mask indicies from MaskI to
4040 /// MaskE correspond consecutively to elements from one of the vector operands,
4041 /// starting from its index OpIdx. Also tell OpNum which source vector operand.
4043 bool isShuffleMaskConsecutive(ShuffleVectorSDNode *SVOp, int MaskI, int MaskE,
4044 int OpIdx, int NumElems, unsigned &OpNum) {
4045 bool SeenV1 = false;
4046 bool SeenV2 = false;
4048 for (int i = MaskI; i <= MaskE; ++i, ++OpIdx) {
4049 int Idx = SVOp->getMaskElt(i);
4050 // Ignore undef indicies
4059 // Only accept consecutive elements from the same vector
4060 if ((Idx % NumElems != OpIdx) || (SeenV1 && SeenV2))
4064 OpNum = SeenV1 ? 0 : 1;
4068 /// isVectorShiftRight - Returns true if the shuffle can be implemented as a
4069 /// logical left shift of a vector.
4070 static bool isVectorShiftRight(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4071 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4072 unsigned NumElems = SVOp->getValueType(0).getVectorNumElements();
4073 unsigned NumZeros = getNumOfConsecutiveZeros(SVOp, NumElems,
4074 false /* check zeros from right */, DAG);
4080 // Considering the elements in the mask that are not consecutive zeros,
4081 // check if they consecutively come from only one of the source vectors.
4083 // V1 = {X, A, B, C} 0
4085 // vector_shuffle V1, V2 <1, 2, 3, X>
4087 if (!isShuffleMaskConsecutive(SVOp,
4088 0, // Mask Start Index
4089 NumElems-NumZeros-1, // Mask End Index
4090 NumZeros, // Where to start looking in the src vector
4091 NumElems, // Number of elements in vector
4092 OpSrc)) // Which source operand ?
4097 ShVal = SVOp->getOperand(OpSrc);
4101 /// isVectorShiftLeft - Returns true if the shuffle can be implemented as a
4102 /// logical left shift of a vector.
4103 static bool isVectorShiftLeft(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4104 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4105 unsigned NumElems = SVOp->getValueType(0).getVectorNumElements();
4106 unsigned NumZeros = getNumOfConsecutiveZeros(SVOp, NumElems,
4107 true /* check zeros from left */, DAG);
4113 // Considering the elements in the mask that are not consecutive zeros,
4114 // check if they consecutively come from only one of the source vectors.
4116 // 0 { A, B, X, X } = V2
4118 // vector_shuffle V1, V2 <X, X, 4, 5>
4120 if (!isShuffleMaskConsecutive(SVOp,
4121 NumZeros, // Mask Start Index
4122 NumElems-1, // Mask End Index
4123 0, // Where to start looking in the src vector
4124 NumElems, // Number of elements in vector
4125 OpSrc)) // Which source operand ?
4130 ShVal = SVOp->getOperand(OpSrc);
4134 /// isVectorShift - Returns true if the shuffle can be implemented as a
4135 /// logical left or right shift of a vector.
4136 static bool isVectorShift(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4137 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4138 if (isVectorShiftLeft(SVOp, DAG, isLeft, ShVal, ShAmt) ||
4139 isVectorShiftRight(SVOp, DAG, isLeft, ShVal, ShAmt))
4145 /// LowerBuildVectorv16i8 - Custom lower build_vector of v16i8.
4147 static SDValue LowerBuildVectorv16i8(SDValue Op, unsigned NonZeros,
4148 unsigned NumNonZero, unsigned NumZero,
4150 const TargetLowering &TLI) {
4154 DebugLoc dl = Op.getDebugLoc();
4157 for (unsigned i = 0; i < 16; ++i) {
4158 bool ThisIsNonZero = (NonZeros & (1 << i)) != 0;
4159 if (ThisIsNonZero && First) {
4161 V = getZeroVector(MVT::v8i16, true, DAG, dl);
4163 V = DAG.getUNDEF(MVT::v8i16);
4168 SDValue ThisElt(0, 0), LastElt(0, 0);
4169 bool LastIsNonZero = (NonZeros & (1 << (i-1))) != 0;
4170 if (LastIsNonZero) {
4171 LastElt = DAG.getNode(ISD::ZERO_EXTEND, dl,
4172 MVT::i16, Op.getOperand(i-1));
4174 if (ThisIsNonZero) {
4175 ThisElt = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i16, Op.getOperand(i));
4176 ThisElt = DAG.getNode(ISD::SHL, dl, MVT::i16,
4177 ThisElt, DAG.getConstant(8, MVT::i8));
4179 ThisElt = DAG.getNode(ISD::OR, dl, MVT::i16, ThisElt, LastElt);
4183 if (ThisElt.getNode())
4184 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, V, ThisElt,
4185 DAG.getIntPtrConstant(i/2));
4189 return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V);
4192 /// LowerBuildVectorv8i16 - Custom lower build_vector of v8i16.
4194 static SDValue LowerBuildVectorv8i16(SDValue Op, unsigned NonZeros,
4195 unsigned NumNonZero, unsigned NumZero,
4197 const TargetLowering &TLI) {
4201 DebugLoc dl = Op.getDebugLoc();
4204 for (unsigned i = 0; i < 8; ++i) {
4205 bool isNonZero = (NonZeros & (1 << i)) != 0;
4209 V = getZeroVector(MVT::v8i16, true, DAG, dl);
4211 V = DAG.getUNDEF(MVT::v8i16);
4214 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl,
4215 MVT::v8i16, V, Op.getOperand(i),
4216 DAG.getIntPtrConstant(i));
4223 /// getVShift - Return a vector logical shift node.
4225 static SDValue getVShift(bool isLeft, EVT VT, SDValue SrcOp,
4226 unsigned NumBits, SelectionDAG &DAG,
4227 const TargetLowering &TLI, DebugLoc dl) {
4228 EVT ShVT = MVT::v2i64;
4229 unsigned Opc = isLeft ? X86ISD::VSHL : X86ISD::VSRL;
4230 SrcOp = DAG.getNode(ISD::BITCAST, dl, ShVT, SrcOp);
4231 return DAG.getNode(ISD::BITCAST, dl, VT,
4232 DAG.getNode(Opc, dl, ShVT, SrcOp,
4233 DAG.getConstant(NumBits,
4234 TLI.getShiftAmountTy(SrcOp.getValueType()))));
4238 X86TargetLowering::LowerAsSplatVectorLoad(SDValue SrcOp, EVT VT, DebugLoc dl,
4239 SelectionDAG &DAG) const {
4241 // Check if the scalar load can be widened into a vector load. And if
4242 // the address is "base + cst" see if the cst can be "absorbed" into
4243 // the shuffle mask.
4244 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(SrcOp)) {
4245 SDValue Ptr = LD->getBasePtr();
4246 if (!ISD::isNormalLoad(LD) || LD->isVolatile())
4248 EVT PVT = LD->getValueType(0);
4249 if (PVT != MVT::i32 && PVT != MVT::f32)
4254 if (FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr)) {
4255 FI = FINode->getIndex();
4257 } else if (DAG.isBaseWithConstantOffset(Ptr) &&
4258 isa<FrameIndexSDNode>(Ptr.getOperand(0))) {
4259 FI = cast<FrameIndexSDNode>(Ptr.getOperand(0))->getIndex();
4260 Offset = Ptr.getConstantOperandVal(1);
4261 Ptr = Ptr.getOperand(0);
4266 SDValue Chain = LD->getChain();
4267 // Make sure the stack object alignment is at least 16.
4268 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
4269 if (DAG.InferPtrAlignment(Ptr) < 16) {
4270 if (MFI->isFixedObjectIndex(FI)) {
4271 // Can't change the alignment. FIXME: It's possible to compute
4272 // the exact stack offset and reference FI + adjust offset instead.
4273 // If someone *really* cares about this. That's the way to implement it.
4276 MFI->setObjectAlignment(FI, 16);
4280 // (Offset % 16) must be multiple of 4. Then address is then
4281 // Ptr + (Offset & ~15).
4284 if ((Offset % 16) & 3)
4286 int64_t StartOffset = Offset & ~15;
4288 Ptr = DAG.getNode(ISD::ADD, Ptr.getDebugLoc(), Ptr.getValueType(),
4289 Ptr,DAG.getConstant(StartOffset, Ptr.getValueType()));
4291 int EltNo = (Offset - StartOffset) >> 2;
4292 int Mask[4] = { EltNo, EltNo, EltNo, EltNo };
4293 EVT VT = (PVT == MVT::i32) ? MVT::v4i32 : MVT::v4f32;
4294 SDValue V1 = DAG.getLoad(VT, dl, Chain, Ptr,
4295 LD->getPointerInfo().getWithOffset(StartOffset),
4297 // Canonicalize it to a v4i32 shuffle.
4298 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, V1);
4299 return DAG.getNode(ISD::BITCAST, dl, VT,
4300 DAG.getVectorShuffle(MVT::v4i32, dl, V1,
4301 DAG.getUNDEF(MVT::v4i32),&Mask[0]));
4307 /// EltsFromConsecutiveLoads - Given the initializing elements 'Elts' of a
4308 /// vector of type 'VT', see if the elements can be replaced by a single large
4309 /// load which has the same value as a build_vector whose operands are 'elts'.
4311 /// Example: <load i32 *a, load i32 *a+4, undef, undef> -> zextload a
4313 /// FIXME: we'd also like to handle the case where the last elements are zero
4314 /// rather than undef via VZEXT_LOAD, but we do not detect that case today.
4315 /// There's even a handy isZeroNode for that purpose.
4316 static SDValue EltsFromConsecutiveLoads(EVT VT, SmallVectorImpl<SDValue> &Elts,
4317 DebugLoc &DL, SelectionDAG &DAG) {
4318 EVT EltVT = VT.getVectorElementType();
4319 unsigned NumElems = Elts.size();
4321 LoadSDNode *LDBase = NULL;
4322 unsigned LastLoadedElt = -1U;
4324 // For each element in the initializer, see if we've found a load or an undef.
4325 // If we don't find an initial load element, or later load elements are
4326 // non-consecutive, bail out.
4327 for (unsigned i = 0; i < NumElems; ++i) {
4328 SDValue Elt = Elts[i];
4330 if (!Elt.getNode() ||
4331 (Elt.getOpcode() != ISD::UNDEF && !ISD::isNON_EXTLoad(Elt.getNode())))
4334 if (Elt.getNode()->getOpcode() == ISD::UNDEF)
4336 LDBase = cast<LoadSDNode>(Elt.getNode());
4340 if (Elt.getOpcode() == ISD::UNDEF)
4343 LoadSDNode *LD = cast<LoadSDNode>(Elt);
4344 if (!DAG.isConsecutiveLoad(LD, LDBase, EltVT.getSizeInBits()/8, i))
4349 // If we have found an entire vector of loads and undefs, then return a large
4350 // load of the entire vector width starting at the base pointer. If we found
4351 // consecutive loads for the low half, generate a vzext_load node.
4352 if (LastLoadedElt == NumElems - 1) {
4353 if (DAG.InferPtrAlignment(LDBase->getBasePtr()) >= 16)
4354 return DAG.getLoad(VT, DL, LDBase->getChain(), LDBase->getBasePtr(),
4355 LDBase->getPointerInfo(),
4356 LDBase->isVolatile(), LDBase->isNonTemporal(), 0);
4357 return DAG.getLoad(VT, DL, LDBase->getChain(), LDBase->getBasePtr(),
4358 LDBase->getPointerInfo(),
4359 LDBase->isVolatile(), LDBase->isNonTemporal(),
4360 LDBase->getAlignment());
4361 } else if (NumElems == 4 && LastLoadedElt == 1) {
4362 SDVTList Tys = DAG.getVTList(MVT::v2i64, MVT::Other);
4363 SDValue Ops[] = { LDBase->getChain(), LDBase->getBasePtr() };
4364 SDValue ResNode = DAG.getMemIntrinsicNode(X86ISD::VZEXT_LOAD, DL, Tys,
4366 LDBase->getMemOperand());
4367 return DAG.getNode(ISD::BITCAST, DL, VT, ResNode);
4373 X86TargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const {
4374 DebugLoc dl = Op.getDebugLoc();
4376 EVT VT = Op.getValueType();
4377 EVT ExtVT = VT.getVectorElementType();
4379 unsigned NumElems = Op.getNumOperands();
4381 // For AVX-length vectors, build the individual 128-bit pieces and
4382 // use shuffles to put them in place.
4383 if (VT.getSizeInBits() > 256 &&
4384 Subtarget->hasAVX() &&
4385 !ISD::isBuildVectorAllZeros(Op.getNode())) {
4386 SmallVector<SDValue, 8> V;
4388 for (unsigned i = 0; i < NumElems; ++i) {
4389 V[i] = Op.getOperand(i);
4392 EVT HVT = EVT::getVectorVT(*DAG.getContext(), ExtVT, NumElems/2);
4394 // Build the lower subvector.
4395 SDValue Lower = DAG.getNode(ISD::BUILD_VECTOR, dl, HVT, &V[0], NumElems/2);
4396 // Build the upper subvector.
4397 SDValue Upper = DAG.getNode(ISD::BUILD_VECTOR, dl, HVT, &V[NumElems / 2],
4400 return ConcatVectors(Lower, Upper, DAG);
4403 // All zero's are handled with pxor in SSE2 and above, xorps in SSE1.
4404 // All one's are handled with pcmpeqd. In AVX, zero's are handled with
4405 // vpxor in 128-bit and xor{pd,ps} in 256-bit, but no 256 version of pcmpeqd
4406 // is present, so AllOnes is ignored.
4407 if (ISD::isBuildVectorAllZeros(Op.getNode()) ||
4408 (Op.getValueType().getSizeInBits() != 256 &&
4409 ISD::isBuildVectorAllOnes(Op.getNode()))) {
4410 // Canonicalize this to <4 x i32> (SSE) to
4411 // 1) ensure the zero vectors are CSE'd, and 2) ensure that i64 scalars are
4412 // eliminated on x86-32 hosts.
4413 if (Op.getValueType() == MVT::v4i32)
4416 if (ISD::isBuildVectorAllOnes(Op.getNode()))
4417 return getOnesVector(Op.getValueType(), DAG, dl);
4418 return getZeroVector(Op.getValueType(), Subtarget->hasSSE2(), DAG, dl);
4421 unsigned EVTBits = ExtVT.getSizeInBits();
4423 unsigned NumZero = 0;
4424 unsigned NumNonZero = 0;
4425 unsigned NonZeros = 0;
4426 bool IsAllConstants = true;
4427 SmallSet<SDValue, 8> Values;
4428 for (unsigned i = 0; i < NumElems; ++i) {
4429 SDValue Elt = Op.getOperand(i);
4430 if (Elt.getOpcode() == ISD::UNDEF)
4433 if (Elt.getOpcode() != ISD::Constant &&
4434 Elt.getOpcode() != ISD::ConstantFP)
4435 IsAllConstants = false;
4436 if (X86::isZeroNode(Elt))
4439 NonZeros |= (1 << i);
4444 // All undef vector. Return an UNDEF. All zero vectors were handled above.
4445 if (NumNonZero == 0)
4446 return DAG.getUNDEF(VT);
4448 // Special case for single non-zero, non-undef, element.
4449 if (NumNonZero == 1) {
4450 unsigned Idx = CountTrailingZeros_32(NonZeros);
4451 SDValue Item = Op.getOperand(Idx);
4453 // If this is an insertion of an i64 value on x86-32, and if the top bits of
4454 // the value are obviously zero, truncate the value to i32 and do the
4455 // insertion that way. Only do this if the value is non-constant or if the
4456 // value is a constant being inserted into element 0. It is cheaper to do
4457 // a constant pool load than it is to do a movd + shuffle.
4458 if (ExtVT == MVT::i64 && !Subtarget->is64Bit() &&
4459 (!IsAllConstants || Idx == 0)) {
4460 if (DAG.MaskedValueIsZero(Item, APInt::getBitsSet(64, 32, 64))) {
4462 assert(VT == MVT::v2i64 && "Expected an SSE value type!");
4463 EVT VecVT = MVT::v4i32;
4464 unsigned VecElts = 4;
4466 // Truncate the value (which may itself be a constant) to i32, and
4467 // convert it to a vector with movd (S2V+shuffle to zero extend).
4468 Item = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, Item);
4469 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VecVT, Item);
4470 Item = getShuffleVectorZeroOrUndef(Item, 0, true,
4471 Subtarget->hasSSE2(), DAG);
4473 // Now we have our 32-bit value zero extended in the low element of
4474 // a vector. If Idx != 0, swizzle it into place.
4476 SmallVector<int, 4> Mask;
4477 Mask.push_back(Idx);
4478 for (unsigned i = 1; i != VecElts; ++i)
4480 Item = DAG.getVectorShuffle(VecVT, dl, Item,
4481 DAG.getUNDEF(Item.getValueType()),
4484 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Item);
4488 // If we have a constant or non-constant insertion into the low element of
4489 // a vector, we can do this with SCALAR_TO_VECTOR + shuffle of zero into
4490 // the rest of the elements. This will be matched as movd/movq/movss/movsd
4491 // depending on what the source datatype is.
4494 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
4495 } else if (ExtVT == MVT::i32 || ExtVT == MVT::f32 || ExtVT == MVT::f64 ||
4496 (ExtVT == MVT::i64 && Subtarget->is64Bit())) {
4497 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
4498 // Turn it into a MOVL (i.e. movss, movsd, or movd) to a zero vector.
4499 return getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget->hasSSE2(),
4501 } else if (ExtVT == MVT::i16 || ExtVT == MVT::i8) {
4502 Item = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, Item);
4503 assert(VT.getSizeInBits() == 128 && "Expected an SSE value type!");
4504 EVT MiddleVT = MVT::v4i32;
4505 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MiddleVT, Item);
4506 Item = getShuffleVectorZeroOrUndef(Item, 0, true,
4507 Subtarget->hasSSE2(), DAG);
4508 return DAG.getNode(ISD::BITCAST, dl, VT, Item);
4512 // Is it a vector logical left shift?
4513 if (NumElems == 2 && Idx == 1 &&
4514 X86::isZeroNode(Op.getOperand(0)) &&
4515 !X86::isZeroNode(Op.getOperand(1))) {
4516 unsigned NumBits = VT.getSizeInBits();
4517 return getVShift(true, VT,
4518 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
4519 VT, Op.getOperand(1)),
4520 NumBits/2, DAG, *this, dl);
4523 if (IsAllConstants) // Otherwise, it's better to do a constpool load.
4526 // Otherwise, if this is a vector with i32 or f32 elements, and the element
4527 // is a non-constant being inserted into an element other than the low one,
4528 // we can't use a constant pool load. Instead, use SCALAR_TO_VECTOR (aka
4529 // movd/movss) to move this into the low element, then shuffle it into
4531 if (EVTBits == 32) {
4532 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
4534 // Turn it into a shuffle of zero and zero-extended scalar to vector.
4535 Item = getShuffleVectorZeroOrUndef(Item, 0, NumZero > 0,
4536 Subtarget->hasSSE2(), DAG);
4537 SmallVector<int, 8> MaskVec;
4538 for (unsigned i = 0; i < NumElems; i++)
4539 MaskVec.push_back(i == Idx ? 0 : 1);
4540 return DAG.getVectorShuffle(VT, dl, Item, DAG.getUNDEF(VT), &MaskVec[0]);
4544 // Splat is obviously ok. Let legalizer expand it to a shuffle.
4545 if (Values.size() == 1) {
4546 if (EVTBits == 32) {
4547 // Instead of a shuffle like this:
4548 // shuffle (scalar_to_vector (load (ptr + 4))), undef, <0, 0, 0, 0>
4549 // Check if it's possible to issue this instead.
4550 // shuffle (vload ptr)), undef, <1, 1, 1, 1>
4551 unsigned Idx = CountTrailingZeros_32(NonZeros);
4552 SDValue Item = Op.getOperand(Idx);
4553 if (Op.getNode()->isOnlyUserOf(Item.getNode()))
4554 return LowerAsSplatVectorLoad(Item, VT, dl, DAG);
4559 // A vector full of immediates; various special cases are already
4560 // handled, so this is best done with a single constant-pool load.
4564 // Let legalizer expand 2-wide build_vectors.
4565 if (EVTBits == 64) {
4566 if (NumNonZero == 1) {
4567 // One half is zero or undef.
4568 unsigned Idx = CountTrailingZeros_32(NonZeros);
4569 SDValue V2 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT,
4570 Op.getOperand(Idx));
4571 return getShuffleVectorZeroOrUndef(V2, Idx, true,
4572 Subtarget->hasSSE2(), DAG);
4577 // If element VT is < 32 bits, convert it to inserts into a zero vector.
4578 if (EVTBits == 8 && NumElems == 16) {
4579 SDValue V = LowerBuildVectorv16i8(Op, NonZeros,NumNonZero,NumZero, DAG,
4581 if (V.getNode()) return V;
4584 if (EVTBits == 16 && NumElems == 8) {
4585 SDValue V = LowerBuildVectorv8i16(Op, NonZeros,NumNonZero,NumZero, DAG,
4587 if (V.getNode()) return V;
4590 // If element VT is == 32 bits, turn it into a number of shuffles.
4591 SmallVector<SDValue, 8> V;
4593 if (NumElems == 4 && NumZero > 0) {
4594 for (unsigned i = 0; i < 4; ++i) {
4595 bool isZero = !(NonZeros & (1 << i));
4597 V[i] = getZeroVector(VT, Subtarget->hasSSE2(), DAG, dl);
4599 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
4602 for (unsigned i = 0; i < 2; ++i) {
4603 switch ((NonZeros & (0x3 << i*2)) >> (i*2)) {
4606 V[i] = V[i*2]; // Must be a zero vector.
4609 V[i] = getMOVL(DAG, dl, VT, V[i*2+1], V[i*2]);
4612 V[i] = getMOVL(DAG, dl, VT, V[i*2], V[i*2+1]);
4615 V[i] = getUnpackl(DAG, dl, VT, V[i*2], V[i*2+1]);
4620 SmallVector<int, 8> MaskVec;
4621 bool Reverse = (NonZeros & 0x3) == 2;
4622 for (unsigned i = 0; i < 2; ++i)
4623 MaskVec.push_back(Reverse ? 1-i : i);
4624 Reverse = ((NonZeros & (0x3 << 2)) >> 2) == 2;
4625 for (unsigned i = 0; i < 2; ++i)
4626 MaskVec.push_back(Reverse ? 1-i+NumElems : i+NumElems);
4627 return DAG.getVectorShuffle(VT, dl, V[0], V[1], &MaskVec[0]);
4630 if (Values.size() > 1 && VT.getSizeInBits() == 128) {
4631 // Check for a build vector of consecutive loads.
4632 for (unsigned i = 0; i < NumElems; ++i)
4633 V[i] = Op.getOperand(i);
4635 // Check for elements which are consecutive loads.
4636 SDValue LD = EltsFromConsecutiveLoads(VT, V, dl, DAG);
4640 // For SSE 4.1, use insertps to put the high elements into the low element.
4641 if (getSubtarget()->hasSSE41()) {
4643 if (Op.getOperand(0).getOpcode() != ISD::UNDEF)
4644 Result = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(0));
4646 Result = DAG.getUNDEF(VT);
4648 for (unsigned i = 1; i < NumElems; ++i) {
4649 if (Op.getOperand(i).getOpcode() == ISD::UNDEF) continue;
4650 Result = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Result,
4651 Op.getOperand(i), DAG.getIntPtrConstant(i));
4656 // Otherwise, expand into a number of unpckl*, start by extending each of
4657 // our (non-undef) elements to the full vector width with the element in the
4658 // bottom slot of the vector (which generates no code for SSE).
4659 for (unsigned i = 0; i < NumElems; ++i) {
4660 if (Op.getOperand(i).getOpcode() != ISD::UNDEF)
4661 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
4663 V[i] = DAG.getUNDEF(VT);
4666 // Next, we iteratively mix elements, e.g. for v4f32:
4667 // Step 1: unpcklps 0, 2 ==> X: <?, ?, 2, 0>
4668 // : unpcklps 1, 3 ==> Y: <?, ?, 3, 1>
4669 // Step 2: unpcklps X, Y ==> <3, 2, 1, 0>
4670 unsigned EltStride = NumElems >> 1;
4671 while (EltStride != 0) {
4672 for (unsigned i = 0; i < EltStride; ++i) {
4673 // If V[i+EltStride] is undef and this is the first round of mixing,
4674 // then it is safe to just drop this shuffle: V[i] is already in the
4675 // right place, the one element (since it's the first round) being
4676 // inserted as undef can be dropped. This isn't safe for successive
4677 // rounds because they will permute elements within both vectors.
4678 if (V[i+EltStride].getOpcode() == ISD::UNDEF &&
4679 EltStride == NumElems/2)
4682 V[i] = getUnpackl(DAG, dl, VT, V[i], V[i + EltStride]);
4692 X86TargetLowering::LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const {
4693 // We support concatenate two MMX registers and place them in a MMX
4694 // register. This is better than doing a stack convert.
4695 DebugLoc dl = Op.getDebugLoc();
4696 EVT ResVT = Op.getValueType();
4697 assert(Op.getNumOperands() == 2);
4698 assert(ResVT == MVT::v2i64 || ResVT == MVT::v4i32 ||
4699 ResVT == MVT::v8i16 || ResVT == MVT::v16i8);
4701 SDValue InVec = DAG.getNode(ISD::BITCAST,dl, MVT::v1i64, Op.getOperand(0));
4702 SDValue VecOp = DAG.getNode(X86ISD::MOVQ2DQ, dl, MVT::v2i64, InVec);
4703 InVec = Op.getOperand(1);
4704 if (InVec.getOpcode() == ISD::SCALAR_TO_VECTOR) {
4705 unsigned NumElts = ResVT.getVectorNumElements();
4706 VecOp = DAG.getNode(ISD::BITCAST, dl, ResVT, VecOp);
4707 VecOp = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, ResVT, VecOp,
4708 InVec.getOperand(0), DAG.getIntPtrConstant(NumElts/2+1));
4710 InVec = DAG.getNode(ISD::BITCAST, dl, MVT::v1i64, InVec);
4711 SDValue VecOp2 = DAG.getNode(X86ISD::MOVQ2DQ, dl, MVT::v2i64, InVec);
4712 Mask[0] = 0; Mask[1] = 2;
4713 VecOp = DAG.getVectorShuffle(MVT::v2i64, dl, VecOp, VecOp2, Mask);
4715 return DAG.getNode(ISD::BITCAST, dl, ResVT, VecOp);
4718 // v8i16 shuffles - Prefer shuffles in the following order:
4719 // 1. [all] pshuflw, pshufhw, optional move
4720 // 2. [ssse3] 1 x pshufb
4721 // 3. [ssse3] 2 x pshufb + 1 x por
4722 // 4. [all] mov + pshuflw + pshufhw + N x (pextrw + pinsrw)
4724 X86TargetLowering::LowerVECTOR_SHUFFLEv8i16(SDValue Op,
4725 SelectionDAG &DAG) const {
4726 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
4727 SDValue V1 = SVOp->getOperand(0);
4728 SDValue V2 = SVOp->getOperand(1);
4729 DebugLoc dl = SVOp->getDebugLoc();
4730 SmallVector<int, 8> MaskVals;
4732 // Determine if more than 1 of the words in each of the low and high quadwords
4733 // of the result come from the same quadword of one of the two inputs. Undef
4734 // mask values count as coming from any quadword, for better codegen.
4735 SmallVector<unsigned, 4> LoQuad(4);
4736 SmallVector<unsigned, 4> HiQuad(4);
4737 BitVector InputQuads(4);
4738 for (unsigned i = 0; i < 8; ++i) {
4739 SmallVectorImpl<unsigned> &Quad = i < 4 ? LoQuad : HiQuad;
4740 int EltIdx = SVOp->getMaskElt(i);
4741 MaskVals.push_back(EltIdx);
4750 InputQuads.set(EltIdx / 4);
4753 int BestLoQuad = -1;
4754 unsigned MaxQuad = 1;
4755 for (unsigned i = 0; i < 4; ++i) {
4756 if (LoQuad[i] > MaxQuad) {
4758 MaxQuad = LoQuad[i];
4762 int BestHiQuad = -1;
4764 for (unsigned i = 0; i < 4; ++i) {
4765 if (HiQuad[i] > MaxQuad) {
4767 MaxQuad = HiQuad[i];
4771 // For SSSE3, If all 8 words of the result come from only 1 quadword of each
4772 // of the two input vectors, shuffle them into one input vector so only a
4773 // single pshufb instruction is necessary. If There are more than 2 input
4774 // quads, disable the next transformation since it does not help SSSE3.
4775 bool V1Used = InputQuads[0] || InputQuads[1];
4776 bool V2Used = InputQuads[2] || InputQuads[3];
4777 if (Subtarget->hasSSSE3()) {
4778 if (InputQuads.count() == 2 && V1Used && V2Used) {
4779 BestLoQuad = InputQuads.find_first();
4780 BestHiQuad = InputQuads.find_next(BestLoQuad);
4782 if (InputQuads.count() > 2) {
4788 // If BestLoQuad or BestHiQuad are set, shuffle the quads together and update
4789 // the shuffle mask. If a quad is scored as -1, that means that it contains
4790 // words from all 4 input quadwords.
4792 if (BestLoQuad >= 0 || BestHiQuad >= 0) {
4793 SmallVector<int, 8> MaskV;
4794 MaskV.push_back(BestLoQuad < 0 ? 0 : BestLoQuad);
4795 MaskV.push_back(BestHiQuad < 0 ? 1 : BestHiQuad);
4796 NewV = DAG.getVectorShuffle(MVT::v2i64, dl,
4797 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V1),
4798 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V2), &MaskV[0]);
4799 NewV = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, NewV);
4801 // Rewrite the MaskVals and assign NewV to V1 if NewV now contains all the
4802 // source words for the shuffle, to aid later transformations.
4803 bool AllWordsInNewV = true;
4804 bool InOrder[2] = { true, true };
4805 for (unsigned i = 0; i != 8; ++i) {
4806 int idx = MaskVals[i];
4808 InOrder[i/4] = false;
4809 if (idx < 0 || (idx/4) == BestLoQuad || (idx/4) == BestHiQuad)
4811 AllWordsInNewV = false;
4815 bool pshuflw = AllWordsInNewV, pshufhw = AllWordsInNewV;
4816 if (AllWordsInNewV) {
4817 for (int i = 0; i != 8; ++i) {
4818 int idx = MaskVals[i];
4821 idx = MaskVals[i] = (idx / 4) == BestLoQuad ? (idx & 3) : (idx & 3) + 4;
4822 if ((idx != i) && idx < 4)
4824 if ((idx != i) && idx > 3)
4833 // If we've eliminated the use of V2, and the new mask is a pshuflw or
4834 // pshufhw, that's as cheap as it gets. Return the new shuffle.
4835 if ((pshufhw && InOrder[0]) || (pshuflw && InOrder[1])) {
4836 unsigned Opc = pshufhw ? X86ISD::PSHUFHW : X86ISD::PSHUFLW;
4837 unsigned TargetMask = 0;
4838 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV,
4839 DAG.getUNDEF(MVT::v8i16), &MaskVals[0]);
4840 TargetMask = pshufhw ? X86::getShufflePSHUFHWImmediate(NewV.getNode()):
4841 X86::getShufflePSHUFLWImmediate(NewV.getNode());
4842 V1 = NewV.getOperand(0);
4843 return getTargetShuffleNode(Opc, dl, MVT::v8i16, V1, TargetMask, DAG);
4847 // If we have SSSE3, and all words of the result are from 1 input vector,
4848 // case 2 is generated, otherwise case 3 is generated. If no SSSE3
4849 // is present, fall back to case 4.
4850 if (Subtarget->hasSSSE3()) {
4851 SmallVector<SDValue,16> pshufbMask;
4853 // If we have elements from both input vectors, set the high bit of the
4854 // shuffle mask element to zero out elements that come from V2 in the V1
4855 // mask, and elements that come from V1 in the V2 mask, so that the two
4856 // results can be OR'd together.
4857 bool TwoInputs = V1Used && V2Used;
4858 for (unsigned i = 0; i != 8; ++i) {
4859 int EltIdx = MaskVals[i] * 2;
4860 if (TwoInputs && (EltIdx >= 16)) {
4861 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
4862 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
4865 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
4866 pshufbMask.push_back(DAG.getConstant(EltIdx+1, MVT::i8));
4868 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V1);
4869 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
4870 DAG.getNode(ISD::BUILD_VECTOR, dl,
4871 MVT::v16i8, &pshufbMask[0], 16));
4873 return DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
4875 // Calculate the shuffle mask for the second input, shuffle it, and
4876 // OR it with the first shuffled input.
4878 for (unsigned i = 0; i != 8; ++i) {
4879 int EltIdx = MaskVals[i] * 2;
4881 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
4882 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
4885 pshufbMask.push_back(DAG.getConstant(EltIdx - 16, MVT::i8));
4886 pshufbMask.push_back(DAG.getConstant(EltIdx - 15, MVT::i8));
4888 V2 = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V2);
4889 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
4890 DAG.getNode(ISD::BUILD_VECTOR, dl,
4891 MVT::v16i8, &pshufbMask[0], 16));
4892 V1 = DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
4893 return DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
4896 // If BestLoQuad >= 0, generate a pshuflw to put the low elements in order,
4897 // and update MaskVals with new element order.
4898 BitVector InOrder(8);
4899 if (BestLoQuad >= 0) {
4900 SmallVector<int, 8> MaskV;
4901 for (int i = 0; i != 4; ++i) {
4902 int idx = MaskVals[i];
4904 MaskV.push_back(-1);
4906 } else if ((idx / 4) == BestLoQuad) {
4907 MaskV.push_back(idx & 3);
4910 MaskV.push_back(-1);
4913 for (unsigned i = 4; i != 8; ++i)
4915 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV, DAG.getUNDEF(MVT::v8i16),
4918 if (NewV.getOpcode() == ISD::VECTOR_SHUFFLE && Subtarget->hasSSSE3())
4919 NewV = getTargetShuffleNode(X86ISD::PSHUFLW, dl, MVT::v8i16,
4921 X86::getShufflePSHUFLWImmediate(NewV.getNode()),
4925 // If BestHi >= 0, generate a pshufhw to put the high elements in order,
4926 // and update MaskVals with the new element order.
4927 if (BestHiQuad >= 0) {
4928 SmallVector<int, 8> MaskV;
4929 for (unsigned i = 0; i != 4; ++i)
4931 for (unsigned i = 4; i != 8; ++i) {
4932 int idx = MaskVals[i];
4934 MaskV.push_back(-1);
4936 } else if ((idx / 4) == BestHiQuad) {
4937 MaskV.push_back((idx & 3) + 4);
4940 MaskV.push_back(-1);
4943 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV, DAG.getUNDEF(MVT::v8i16),
4946 if (NewV.getOpcode() == ISD::VECTOR_SHUFFLE && Subtarget->hasSSSE3())
4947 NewV = getTargetShuffleNode(X86ISD::PSHUFHW, dl, MVT::v8i16,
4949 X86::getShufflePSHUFHWImmediate(NewV.getNode()),
4953 // In case BestHi & BestLo were both -1, which means each quadword has a word
4954 // from each of the four input quadwords, calculate the InOrder bitvector now
4955 // before falling through to the insert/extract cleanup.
4956 if (BestLoQuad == -1 && BestHiQuad == -1) {
4958 for (int i = 0; i != 8; ++i)
4959 if (MaskVals[i] < 0 || MaskVals[i] == i)
4963 // The other elements are put in the right place using pextrw and pinsrw.
4964 for (unsigned i = 0; i != 8; ++i) {
4967 int EltIdx = MaskVals[i];
4970 SDValue ExtOp = (EltIdx < 8)
4971 ? DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V1,
4972 DAG.getIntPtrConstant(EltIdx))
4973 : DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V2,
4974 DAG.getIntPtrConstant(EltIdx - 8));
4975 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, ExtOp,
4976 DAG.getIntPtrConstant(i));
4981 // v16i8 shuffles - Prefer shuffles in the following order:
4982 // 1. [ssse3] 1 x pshufb
4983 // 2. [ssse3] 2 x pshufb + 1 x por
4984 // 3. [all] v8i16 shuffle + N x pextrw + rotate + pinsrw
4986 SDValue LowerVECTOR_SHUFFLEv16i8(ShuffleVectorSDNode *SVOp,
4988 const X86TargetLowering &TLI) {
4989 SDValue V1 = SVOp->getOperand(0);
4990 SDValue V2 = SVOp->getOperand(1);
4991 DebugLoc dl = SVOp->getDebugLoc();
4992 SmallVector<int, 16> MaskVals;
4993 SVOp->getMask(MaskVals);
4995 // If we have SSSE3, case 1 is generated when all result bytes come from
4996 // one of the inputs. Otherwise, case 2 is generated. If no SSSE3 is
4997 // present, fall back to case 3.
4998 // FIXME: kill V2Only once shuffles are canonizalized by getNode.
5001 for (unsigned i = 0; i < 16; ++i) {
5002 int EltIdx = MaskVals[i];
5011 // If SSSE3, use 1 pshufb instruction per vector with elements in the result.
5012 if (TLI.getSubtarget()->hasSSSE3()) {
5013 SmallVector<SDValue,16> pshufbMask;
5015 // If all result elements are from one input vector, then only translate
5016 // undef mask values to 0x80 (zero out result) in the pshufb mask.
5018 // Otherwise, we have elements from both input vectors, and must zero out
5019 // elements that come from V2 in the first mask, and V1 in the second mask
5020 // so that we can OR them together.
5021 bool TwoInputs = !(V1Only || V2Only);
5022 for (unsigned i = 0; i != 16; ++i) {
5023 int EltIdx = MaskVals[i];
5024 if (EltIdx < 0 || (TwoInputs && EltIdx >= 16)) {
5025 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5028 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
5030 // If all the elements are from V2, assign it to V1 and return after
5031 // building the first pshufb.
5034 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
5035 DAG.getNode(ISD::BUILD_VECTOR, dl,
5036 MVT::v16i8, &pshufbMask[0], 16));
5040 // Calculate the shuffle mask for the second input, shuffle it, and
5041 // OR it with the first shuffled input.
5043 for (unsigned i = 0; i != 16; ++i) {
5044 int EltIdx = MaskVals[i];
5046 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5049 pshufbMask.push_back(DAG.getConstant(EltIdx - 16, MVT::i8));
5051 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
5052 DAG.getNode(ISD::BUILD_VECTOR, dl,
5053 MVT::v16i8, &pshufbMask[0], 16));
5054 return DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
5057 // No SSSE3 - Calculate in place words and then fix all out of place words
5058 // With 0-16 extracts & inserts. Worst case is 16 bytes out of order from
5059 // the 16 different words that comprise the two doublequadword input vectors.
5060 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
5061 V2 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V2);
5062 SDValue NewV = V2Only ? V2 : V1;
5063 for (int i = 0; i != 8; ++i) {
5064 int Elt0 = MaskVals[i*2];
5065 int Elt1 = MaskVals[i*2+1];
5067 // This word of the result is all undef, skip it.
5068 if (Elt0 < 0 && Elt1 < 0)
5071 // This word of the result is already in the correct place, skip it.
5072 if (V1Only && (Elt0 == i*2) && (Elt1 == i*2+1))
5074 if (V2Only && (Elt0 == i*2+16) && (Elt1 == i*2+17))
5077 SDValue Elt0Src = Elt0 < 16 ? V1 : V2;
5078 SDValue Elt1Src = Elt1 < 16 ? V1 : V2;
5081 // If Elt0 and Elt1 are defined, are consecutive, and can be load
5082 // using a single extract together, load it and store it.
5083 if ((Elt0 >= 0) && ((Elt0 + 1) == Elt1) && ((Elt0 & 1) == 0)) {
5084 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
5085 DAG.getIntPtrConstant(Elt1 / 2));
5086 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
5087 DAG.getIntPtrConstant(i));
5091 // If Elt1 is defined, extract it from the appropriate source. If the
5092 // source byte is not also odd, shift the extracted word left 8 bits
5093 // otherwise clear the bottom 8 bits if we need to do an or.
5095 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
5096 DAG.getIntPtrConstant(Elt1 / 2));
5097 if ((Elt1 & 1) == 0)
5098 InsElt = DAG.getNode(ISD::SHL, dl, MVT::i16, InsElt,
5100 TLI.getShiftAmountTy(InsElt.getValueType())));
5102 InsElt = DAG.getNode(ISD::AND, dl, MVT::i16, InsElt,
5103 DAG.getConstant(0xFF00, MVT::i16));
5105 // If Elt0 is defined, extract it from the appropriate source. If the
5106 // source byte is not also even, shift the extracted word right 8 bits. If
5107 // Elt1 was also defined, OR the extracted values together before
5108 // inserting them in the result.
5110 SDValue InsElt0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16,
5111 Elt0Src, DAG.getIntPtrConstant(Elt0 / 2));
5112 if ((Elt0 & 1) != 0)
5113 InsElt0 = DAG.getNode(ISD::SRL, dl, MVT::i16, InsElt0,
5115 TLI.getShiftAmountTy(InsElt0.getValueType())));
5117 InsElt0 = DAG.getNode(ISD::AND, dl, MVT::i16, InsElt0,
5118 DAG.getConstant(0x00FF, MVT::i16));
5119 InsElt = Elt1 >= 0 ? DAG.getNode(ISD::OR, dl, MVT::i16, InsElt, InsElt0)
5122 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
5123 DAG.getIntPtrConstant(i));
5125 return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, NewV);
5128 /// RewriteAsNarrowerShuffle - Try rewriting v8i16 and v16i8 shuffles as 4 wide
5129 /// ones, or rewriting v4i32 / v4f32 as 2 wide ones if possible. This can be
5130 /// done when every pair / quad of shuffle mask elements point to elements in
5131 /// the right sequence. e.g.
5132 /// vector_shuffle X, Y, <2, 3, | 10, 11, | 0, 1, | 14, 15>
5134 SDValue RewriteAsNarrowerShuffle(ShuffleVectorSDNode *SVOp,
5135 SelectionDAG &DAG, DebugLoc dl) {
5136 EVT VT = SVOp->getValueType(0);
5137 SDValue V1 = SVOp->getOperand(0);
5138 SDValue V2 = SVOp->getOperand(1);
5139 unsigned NumElems = VT.getVectorNumElements();
5140 unsigned NewWidth = (NumElems == 4) ? 2 : 4;
5142 switch (VT.getSimpleVT().SimpleTy) {
5143 default: assert(false && "Unexpected!");
5144 case MVT::v4f32: NewVT = MVT::v2f64; break;
5145 case MVT::v4i32: NewVT = MVT::v2i64; break;
5146 case MVT::v8i16: NewVT = MVT::v4i32; break;
5147 case MVT::v16i8: NewVT = MVT::v4i32; break;
5150 int Scale = NumElems / NewWidth;
5151 SmallVector<int, 8> MaskVec;
5152 for (unsigned i = 0; i < NumElems; i += Scale) {
5154 for (int j = 0; j < Scale; ++j) {
5155 int EltIdx = SVOp->getMaskElt(i+j);
5159 StartIdx = EltIdx - (EltIdx % Scale);
5160 if (EltIdx != StartIdx + j)
5164 MaskVec.push_back(-1);
5166 MaskVec.push_back(StartIdx / Scale);
5169 V1 = DAG.getNode(ISD::BITCAST, dl, NewVT, V1);
5170 V2 = DAG.getNode(ISD::BITCAST, dl, NewVT, V2);
5171 return DAG.getVectorShuffle(NewVT, dl, V1, V2, &MaskVec[0]);
5174 /// getVZextMovL - Return a zero-extending vector move low node.
5176 static SDValue getVZextMovL(EVT VT, EVT OpVT,
5177 SDValue SrcOp, SelectionDAG &DAG,
5178 const X86Subtarget *Subtarget, DebugLoc dl) {
5179 if (VT == MVT::v2f64 || VT == MVT::v4f32) {
5180 LoadSDNode *LD = NULL;
5181 if (!isScalarLoadToVector(SrcOp.getNode(), &LD))
5182 LD = dyn_cast<LoadSDNode>(SrcOp);
5184 // movssrr and movsdrr do not clear top bits. Try to use movd, movq
5186 MVT ExtVT = (OpVT == MVT::v2f64) ? MVT::i64 : MVT::i32;
5187 if ((ExtVT != MVT::i64 || Subtarget->is64Bit()) &&
5188 SrcOp.getOpcode() == ISD::SCALAR_TO_VECTOR &&
5189 SrcOp.getOperand(0).getOpcode() == ISD::BITCAST &&
5190 SrcOp.getOperand(0).getOperand(0).getValueType() == ExtVT) {
5192 OpVT = (OpVT == MVT::v2f64) ? MVT::v2i64 : MVT::v4i32;
5193 return DAG.getNode(ISD::BITCAST, dl, VT,
5194 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
5195 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
5203 return DAG.getNode(ISD::BITCAST, dl, VT,
5204 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
5205 DAG.getNode(ISD::BITCAST, dl,
5209 /// LowerVECTOR_SHUFFLE_4wide - Handle all 4 wide cases with a number of
5212 LowerVECTOR_SHUFFLE_4wide(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
5213 SDValue V1 = SVOp->getOperand(0);
5214 SDValue V2 = SVOp->getOperand(1);
5215 DebugLoc dl = SVOp->getDebugLoc();
5216 EVT VT = SVOp->getValueType(0);
5218 SmallVector<std::pair<int, int>, 8> Locs;
5220 SmallVector<int, 8> Mask1(4U, -1);
5221 SmallVector<int, 8> PermMask;
5222 SVOp->getMask(PermMask);
5226 for (unsigned i = 0; i != 4; ++i) {
5227 int Idx = PermMask[i];
5229 Locs[i] = std::make_pair(-1, -1);
5231 assert(Idx < 8 && "Invalid VECTOR_SHUFFLE index!");
5233 Locs[i] = std::make_pair(0, NumLo);
5237 Locs[i] = std::make_pair(1, NumHi);
5239 Mask1[2+NumHi] = Idx;
5245 if (NumLo <= 2 && NumHi <= 2) {
5246 // If no more than two elements come from either vector. This can be
5247 // implemented with two shuffles. First shuffle gather the elements.
5248 // The second shuffle, which takes the first shuffle as both of its
5249 // vector operands, put the elements into the right order.
5250 V1 = DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
5252 SmallVector<int, 8> Mask2(4U, -1);
5254 for (unsigned i = 0; i != 4; ++i) {
5255 if (Locs[i].first == -1)
5258 unsigned Idx = (i < 2) ? 0 : 4;
5259 Idx += Locs[i].first * 2 + Locs[i].second;
5264 return DAG.getVectorShuffle(VT, dl, V1, V1, &Mask2[0]);
5265 } else if (NumLo == 3 || NumHi == 3) {
5266 // Otherwise, we must have three elements from one vector, call it X, and
5267 // one element from the other, call it Y. First, use a shufps to build an
5268 // intermediate vector with the one element from Y and the element from X
5269 // that will be in the same half in the final destination (the indexes don't
5270 // matter). Then, use a shufps to build the final vector, taking the half
5271 // containing the element from Y from the intermediate, and the other half
5274 // Normalize it so the 3 elements come from V1.
5275 CommuteVectorShuffleMask(PermMask, VT);
5279 // Find the element from V2.
5281 for (HiIndex = 0; HiIndex < 3; ++HiIndex) {
5282 int Val = PermMask[HiIndex];
5289 Mask1[0] = PermMask[HiIndex];
5291 Mask1[2] = PermMask[HiIndex^1];
5293 V2 = DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
5296 Mask1[0] = PermMask[0];
5297 Mask1[1] = PermMask[1];
5298 Mask1[2] = HiIndex & 1 ? 6 : 4;
5299 Mask1[3] = HiIndex & 1 ? 4 : 6;
5300 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
5302 Mask1[0] = HiIndex & 1 ? 2 : 0;
5303 Mask1[1] = HiIndex & 1 ? 0 : 2;
5304 Mask1[2] = PermMask[2];
5305 Mask1[3] = PermMask[3];
5310 return DAG.getVectorShuffle(VT, dl, V2, V1, &Mask1[0]);
5314 // Break it into (shuffle shuffle_hi, shuffle_lo).
5317 SmallVector<int,8> LoMask(4U, -1);
5318 SmallVector<int,8> HiMask(4U, -1);
5320 SmallVector<int,8> *MaskPtr = &LoMask;
5321 unsigned MaskIdx = 0;
5324 for (unsigned i = 0; i != 4; ++i) {
5331 int Idx = PermMask[i];
5333 Locs[i] = std::make_pair(-1, -1);
5334 } else if (Idx < 4) {
5335 Locs[i] = std::make_pair(MaskIdx, LoIdx);
5336 (*MaskPtr)[LoIdx] = Idx;
5339 Locs[i] = std::make_pair(MaskIdx, HiIdx);
5340 (*MaskPtr)[HiIdx] = Idx;
5345 SDValue LoShuffle = DAG.getVectorShuffle(VT, dl, V1, V2, &LoMask[0]);
5346 SDValue HiShuffle = DAG.getVectorShuffle(VT, dl, V1, V2, &HiMask[0]);
5347 SmallVector<int, 8> MaskOps;
5348 for (unsigned i = 0; i != 4; ++i) {
5349 if (Locs[i].first == -1) {
5350 MaskOps.push_back(-1);
5352 unsigned Idx = Locs[i].first * 4 + Locs[i].second;
5353 MaskOps.push_back(Idx);
5356 return DAG.getVectorShuffle(VT, dl, LoShuffle, HiShuffle, &MaskOps[0]);
5359 static bool MayFoldVectorLoad(SDValue V) {
5360 if (V.hasOneUse() && V.getOpcode() == ISD::BITCAST)
5361 V = V.getOperand(0);
5362 if (V.hasOneUse() && V.getOpcode() == ISD::SCALAR_TO_VECTOR)
5363 V = V.getOperand(0);
5369 // FIXME: the version above should always be used. Since there's
5370 // a bug where several vector shuffles can't be folded because the
5371 // DAG is not updated during lowering and a node claims to have two
5372 // uses while it only has one, use this version, and let isel match
5373 // another instruction if the load really happens to have more than
5374 // one use. Remove this version after this bug get fixed.
5375 // rdar://8434668, PR8156
5376 static bool RelaxedMayFoldVectorLoad(SDValue V) {
5377 if (V.hasOneUse() && V.getOpcode() == ISD::BITCAST)
5378 V = V.getOperand(0);
5379 if (V.hasOneUse() && V.getOpcode() == ISD::SCALAR_TO_VECTOR)
5380 V = V.getOperand(0);
5381 if (ISD::isNormalLoad(V.getNode()))
5386 /// CanFoldShuffleIntoVExtract - Check if the current shuffle is used by
5387 /// a vector extract, and if both can be later optimized into a single load.
5388 /// This is done in visitEXTRACT_VECTOR_ELT and the conditions are checked
5389 /// here because otherwise a target specific shuffle node is going to be
5390 /// emitted for this shuffle, and the optimization not done.
5391 /// FIXME: This is probably not the best approach, but fix the problem
5392 /// until the right path is decided.
5394 bool CanXFormVExtractWithShuffleIntoLoad(SDValue V, SelectionDAG &DAG,
5395 const TargetLowering &TLI) {
5396 EVT VT = V.getValueType();
5397 ShuffleVectorSDNode *SVOp = dyn_cast<ShuffleVectorSDNode>(V);
5399 // Be sure that the vector shuffle is present in a pattern like this:
5400 // (vextract (v4f32 shuffle (load $addr), <1,u,u,u>), c) -> (f32 load $addr)
5404 SDNode *N = *V.getNode()->use_begin();
5405 if (N->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
5408 SDValue EltNo = N->getOperand(1);
5409 if (!isa<ConstantSDNode>(EltNo))
5412 // If the bit convert changed the number of elements, it is unsafe
5413 // to examine the mask.
5414 bool HasShuffleIntoBitcast = false;
5415 if (V.getOpcode() == ISD::BITCAST) {
5416 EVT SrcVT = V.getOperand(0).getValueType();
5417 if (SrcVT.getVectorNumElements() != VT.getVectorNumElements())
5419 V = V.getOperand(0);
5420 HasShuffleIntoBitcast = true;
5423 // Select the input vector, guarding against out of range extract vector.
5424 unsigned NumElems = VT.getVectorNumElements();
5425 unsigned Elt = cast<ConstantSDNode>(EltNo)->getZExtValue();
5426 int Idx = (Elt > NumElems) ? -1 : SVOp->getMaskElt(Elt);
5427 V = (Idx < (int)NumElems) ? V.getOperand(0) : V.getOperand(1);
5429 // Skip one more bit_convert if necessary
5430 if (V.getOpcode() == ISD::BITCAST)
5431 V = V.getOperand(0);
5433 if (ISD::isNormalLoad(V.getNode())) {
5434 // Is the original load suitable?
5435 LoadSDNode *LN0 = cast<LoadSDNode>(V);
5437 // FIXME: avoid the multi-use bug that is preventing lots of
5438 // of foldings to be detected, this is still wrong of course, but
5439 // give the temporary desired behavior, and if it happens that
5440 // the load has real more uses, during isel it will not fold, and
5441 // will generate poor code.
5442 if (!LN0 || LN0->isVolatile()) // || !LN0->hasOneUse()
5445 if (!HasShuffleIntoBitcast)
5448 // If there's a bitcast before the shuffle, check if the load type and
5449 // alignment is valid.
5450 unsigned Align = LN0->getAlignment();
5452 TLI.getTargetData()->getABITypeAlignment(
5453 VT.getTypeForEVT(*DAG.getContext()));
5455 if (NewAlign > Align || !TLI.isOperationLegalOrCustom(ISD::LOAD, VT))
5463 SDValue getMOVDDup(SDValue &Op, DebugLoc &dl, SDValue V1, SelectionDAG &DAG) {
5464 EVT VT = Op.getValueType();
5466 // Canonizalize to v2f64.
5467 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, V1);
5468 return DAG.getNode(ISD::BITCAST, dl, VT,
5469 getTargetShuffleNode(X86ISD::MOVDDUP, dl, MVT::v2f64,
5474 SDValue getMOVLowToHigh(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG,
5476 SDValue V1 = Op.getOperand(0);
5477 SDValue V2 = Op.getOperand(1);
5478 EVT VT = Op.getValueType();
5480 assert(VT != MVT::v2i64 && "unsupported shuffle type");
5482 if (HasSSE2 && VT == MVT::v2f64)
5483 return getTargetShuffleNode(X86ISD::MOVLHPD, dl, VT, V1, V2, DAG);
5486 return getTargetShuffleNode(X86ISD::MOVLHPS, dl, VT, V1, V2, DAG);
5490 SDValue getMOVHighToLow(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG) {
5491 SDValue V1 = Op.getOperand(0);
5492 SDValue V2 = Op.getOperand(1);
5493 EVT VT = Op.getValueType();
5495 assert((VT == MVT::v4i32 || VT == MVT::v4f32) &&
5496 "unsupported shuffle type");
5498 if (V2.getOpcode() == ISD::UNDEF)
5502 return getTargetShuffleNode(X86ISD::MOVHLPS, dl, VT, V1, V2, DAG);
5506 SDValue getMOVLP(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG, bool HasSSE2) {
5507 SDValue V1 = Op.getOperand(0);
5508 SDValue V2 = Op.getOperand(1);
5509 EVT VT = Op.getValueType();
5510 unsigned NumElems = VT.getVectorNumElements();
5512 // Use MOVLPS and MOVLPD in case V1 or V2 are loads. During isel, the second
5513 // operand of these instructions is only memory, so check if there's a
5514 // potencial load folding here, otherwise use SHUFPS or MOVSD to match the
5516 bool CanFoldLoad = false;
5518 // Trivial case, when V2 comes from a load.
5519 if (MayFoldVectorLoad(V2))
5522 // When V1 is a load, it can be folded later into a store in isel, example:
5523 // (store (v4f32 (X86Movlps (load addr:$src1), VR128:$src2)), addr:$src1)
5525 // (MOVLPSmr addr:$src1, VR128:$src2)
5526 // So, recognize this potential and also use MOVLPS or MOVLPD
5527 if (MayFoldVectorLoad(V1) && MayFoldIntoStore(Op))
5530 // Both of them can't be memory operations though.
5531 if (MayFoldVectorLoad(V1) && MayFoldVectorLoad(V2))
5532 CanFoldLoad = false;
5535 if (HasSSE2 && NumElems == 2)
5536 return getTargetShuffleNode(X86ISD::MOVLPD, dl, VT, V1, V2, DAG);
5539 return getTargetShuffleNode(X86ISD::MOVLPS, dl, VT, V1, V2, DAG);
5542 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
5543 // movl and movlp will both match v2i64, but v2i64 is never matched by
5544 // movl earlier because we make it strict to avoid messing with the movlp load
5545 // folding logic (see the code above getMOVLP call). Match it here then,
5546 // this is horrible, but will stay like this until we move all shuffle
5547 // matching to x86 specific nodes. Note that for the 1st condition all
5548 // types are matched with movsd.
5549 if ((HasSSE2 && NumElems == 2) || !X86::isMOVLMask(SVOp))
5550 return getTargetShuffleNode(X86ISD::MOVSD, dl, VT, V1, V2, DAG);
5552 return getTargetShuffleNode(X86ISD::MOVSS, dl, VT, V1, V2, DAG);
5555 assert(VT != MVT::v4i32 && "unsupported shuffle type");
5557 // Invert the operand order and use SHUFPS to match it.
5558 return getTargetShuffleNode(X86ISD::SHUFPS, dl, VT, V2, V1,
5559 X86::getShuffleSHUFImmediate(SVOp), DAG);
5562 static inline unsigned getUNPCKLOpcode(EVT VT, const X86Subtarget *Subtarget) {
5563 switch(VT.getSimpleVT().SimpleTy) {
5564 case MVT::v4i32: return X86ISD::PUNPCKLDQ;
5565 case MVT::v2i64: return X86ISD::PUNPCKLQDQ;
5567 return Subtarget->hasAVX() ? X86ISD::VUNPCKLPS : X86ISD::UNPCKLPS;
5569 return Subtarget->hasAVX() ? X86ISD::VUNPCKLPD : X86ISD::UNPCKLPD;
5570 case MVT::v8f32: return X86ISD::VUNPCKLPSY;
5571 case MVT::v4f64: return X86ISD::VUNPCKLPDY;
5572 case MVT::v16i8: return X86ISD::PUNPCKLBW;
5573 case MVT::v8i16: return X86ISD::PUNPCKLWD;
5575 llvm_unreachable("Unknown type for unpckl");
5580 static inline unsigned getUNPCKHOpcode(EVT VT) {
5581 switch(VT.getSimpleVT().SimpleTy) {
5582 case MVT::v4i32: return X86ISD::PUNPCKHDQ;
5583 case MVT::v2i64: return X86ISD::PUNPCKHQDQ;
5584 case MVT::v4f32: return X86ISD::UNPCKHPS;
5585 case MVT::v2f64: return X86ISD::UNPCKHPD;
5586 case MVT::v16i8: return X86ISD::PUNPCKHBW;
5587 case MVT::v8i16: return X86ISD::PUNPCKHWD;
5589 llvm_unreachable("Unknown type for unpckh");
5595 SDValue NormalizeVectorShuffle(SDValue Op, SelectionDAG &DAG,
5596 const TargetLowering &TLI,
5597 const X86Subtarget *Subtarget) {
5598 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
5599 EVT VT = Op.getValueType();
5600 DebugLoc dl = Op.getDebugLoc();
5601 SDValue V1 = Op.getOperand(0);
5602 SDValue V2 = Op.getOperand(1);
5604 if (isZeroShuffle(SVOp))
5605 return getZeroVector(VT, Subtarget->hasSSE2(), DAG, dl);
5607 // Handle splat operations
5608 if (SVOp->isSplat()) {
5609 // Special case, this is the only place now where it's
5610 // allowed to return a vector_shuffle operation without
5611 // using a target specific node, because *hopefully* it
5612 // will be optimized away by the dag combiner.
5613 if (VT.getVectorNumElements() <= 4 &&
5614 CanXFormVExtractWithShuffleIntoLoad(Op, DAG, TLI))
5617 // Handle splats by matching through known masks
5618 if (VT.getVectorNumElements() <= 4)
5621 // Canonicalize all of the remaining to v4f32.
5622 return PromoteSplat(SVOp, DAG);
5625 // If the shuffle can be profitably rewritten as a narrower shuffle, then
5627 if (VT == MVT::v8i16 || VT == MVT::v16i8) {
5628 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG, dl);
5629 if (NewOp.getNode())
5630 return DAG.getNode(ISD::BITCAST, dl, VT, NewOp);
5631 } else if ((VT == MVT::v4i32 || (VT == MVT::v4f32 && Subtarget->hasSSE2()))) {
5632 // FIXME: Figure out a cleaner way to do this.
5633 // Try to make use of movq to zero out the top part.
5634 if (ISD::isBuildVectorAllZeros(V2.getNode())) {
5635 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG, dl);
5636 if (NewOp.getNode()) {
5637 if (isCommutedMOVL(cast<ShuffleVectorSDNode>(NewOp), true, false))
5638 return getVZextMovL(VT, NewOp.getValueType(), NewOp.getOperand(0),
5639 DAG, Subtarget, dl);
5641 } else if (ISD::isBuildVectorAllZeros(V1.getNode())) {
5642 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG, dl);
5643 if (NewOp.getNode() && X86::isMOVLMask(cast<ShuffleVectorSDNode>(NewOp)))
5644 return getVZextMovL(VT, NewOp.getValueType(), NewOp.getOperand(1),
5645 DAG, Subtarget, dl);
5652 X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const {
5653 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
5654 SDValue V1 = Op.getOperand(0);
5655 SDValue V2 = Op.getOperand(1);
5656 EVT VT = Op.getValueType();
5657 DebugLoc dl = Op.getDebugLoc();
5658 unsigned NumElems = VT.getVectorNumElements();
5659 bool isMMX = VT.getSizeInBits() == 64;
5660 bool V1IsUndef = V1.getOpcode() == ISD::UNDEF;
5661 bool V2IsUndef = V2.getOpcode() == ISD::UNDEF;
5662 bool V1IsSplat = false;
5663 bool V2IsSplat = false;
5664 bool HasSSE2 = Subtarget->hasSSE2() || Subtarget->hasAVX();
5665 bool HasSSE3 = Subtarget->hasSSE3() || Subtarget->hasAVX();
5666 bool HasSSSE3 = Subtarget->hasSSSE3() || Subtarget->hasAVX();
5667 MachineFunction &MF = DAG.getMachineFunction();
5668 bool OptForSize = MF.getFunction()->hasFnAttr(Attribute::OptimizeForSize);
5670 // Shuffle operations on MMX not supported.
5674 // Vector shuffle lowering takes 3 steps:
5676 // 1) Normalize the input vectors. Here splats, zeroed vectors, profitable
5677 // narrowing and commutation of operands should be handled.
5678 // 2) Matching of shuffles with known shuffle masks to x86 target specific
5680 // 3) Rewriting of unmatched masks into new generic shuffle operations,
5681 // so the shuffle can be broken into other shuffles and the legalizer can
5682 // try the lowering again.
5684 // The general ideia is that no vector_shuffle operation should be left to
5685 // be matched during isel, all of them must be converted to a target specific
5688 // Normalize the input vectors. Here splats, zeroed vectors, profitable
5689 // narrowing and commutation of operands should be handled. The actual code
5690 // doesn't include all of those, work in progress...
5691 SDValue NewOp = NormalizeVectorShuffle(Op, DAG, *this, Subtarget);
5692 if (NewOp.getNode())
5695 // NOTE: isPSHUFDMask can also match both masks below (unpckl_undef and
5696 // unpckh_undef). Only use pshufd if speed is more important than size.
5697 if (OptForSize && X86::isUNPCKL_v_undef_Mask(SVOp))
5698 if (VT != MVT::v2i64 && VT != MVT::v2f64)
5699 return getTargetShuffleNode(getUNPCKLOpcode(VT, getSubtarget()), dl, VT, V1, V1, DAG);
5700 if (OptForSize && X86::isUNPCKH_v_undef_Mask(SVOp))
5701 if (VT != MVT::v2i64 && VT != MVT::v2f64)
5702 return getTargetShuffleNode(getUNPCKHOpcode(VT), dl, VT, V1, V1, DAG);
5704 if (X86::isMOVDDUPMask(SVOp) && HasSSE3 && V2IsUndef &&
5705 RelaxedMayFoldVectorLoad(V1))
5706 return getMOVDDup(Op, dl, V1, DAG);
5708 if (X86::isMOVHLPS_v_undef_Mask(SVOp))
5709 return getMOVHighToLow(Op, dl, DAG);
5711 // Use to match splats
5712 if (HasSSE2 && X86::isUNPCKHMask(SVOp) && V2IsUndef &&
5713 (VT == MVT::v2f64 || VT == MVT::v2i64))
5714 return getTargetShuffleNode(getUNPCKHOpcode(VT), dl, VT, V1, V1, DAG);
5716 if (X86::isPSHUFDMask(SVOp)) {
5717 // The actual implementation will match the mask in the if above and then
5718 // during isel it can match several different instructions, not only pshufd
5719 // as its name says, sad but true, emulate the behavior for now...
5720 if (X86::isMOVDDUPMask(SVOp) && ((VT == MVT::v4f32 || VT == MVT::v2i64)))
5721 return getTargetShuffleNode(X86ISD::MOVLHPS, dl, VT, V1, V1, DAG);
5723 unsigned TargetMask = X86::getShuffleSHUFImmediate(SVOp);
5725 if (HasSSE2 && (VT == MVT::v4f32 || VT == MVT::v4i32))
5726 return getTargetShuffleNode(X86ISD::PSHUFD, dl, VT, V1, TargetMask, DAG);
5728 if (HasSSE2 && (VT == MVT::v2i64 || VT == MVT::v2f64))
5729 return getTargetShuffleNode(X86ISD::SHUFPD, dl, VT, V1, V1,
5732 if (VT == MVT::v4f32)
5733 return getTargetShuffleNode(X86ISD::SHUFPS, dl, VT, V1, V1,
5737 // Check if this can be converted into a logical shift.
5738 bool isLeft = false;
5741 bool isShift = getSubtarget()->hasSSE2() &&
5742 isVectorShift(SVOp, DAG, isLeft, ShVal, ShAmt);
5743 if (isShift && ShVal.hasOneUse()) {
5744 // If the shifted value has multiple uses, it may be cheaper to use
5745 // v_set0 + movlhps or movhlps, etc.
5746 EVT EltVT = VT.getVectorElementType();
5747 ShAmt *= EltVT.getSizeInBits();
5748 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
5751 if (X86::isMOVLMask(SVOp)) {
5754 if (ISD::isBuildVectorAllZeros(V1.getNode()))
5755 return getVZextMovL(VT, VT, V2, DAG, Subtarget, dl);
5756 if (!X86::isMOVLPMask(SVOp)) {
5757 if (HasSSE2 && (VT == MVT::v2i64 || VT == MVT::v2f64))
5758 return getTargetShuffleNode(X86ISD::MOVSD, dl, VT, V1, V2, DAG);
5760 if (VT == MVT::v4i32 || VT == MVT::v4f32)
5761 return getTargetShuffleNode(X86ISD::MOVSS, dl, VT, V1, V2, DAG);
5765 // FIXME: fold these into legal mask.
5766 if (X86::isMOVLHPSMask(SVOp) && !X86::isUNPCKLMask(SVOp))
5767 return getMOVLowToHigh(Op, dl, DAG, HasSSE2);
5769 if (X86::isMOVHLPSMask(SVOp))
5770 return getMOVHighToLow(Op, dl, DAG);
5772 if (X86::isMOVSHDUPMask(SVOp) && HasSSE3 && V2IsUndef && NumElems == 4)
5773 return getTargetShuffleNode(X86ISD::MOVSHDUP, dl, VT, V1, DAG);
5775 if (X86::isMOVSLDUPMask(SVOp) && HasSSE3 && V2IsUndef && NumElems == 4)
5776 return getTargetShuffleNode(X86ISD::MOVSLDUP, dl, VT, V1, DAG);
5778 if (X86::isMOVLPMask(SVOp))
5779 return getMOVLP(Op, dl, DAG, HasSSE2);
5781 if (ShouldXformToMOVHLPS(SVOp) ||
5782 ShouldXformToMOVLP(V1.getNode(), V2.getNode(), SVOp))
5783 return CommuteVectorShuffle(SVOp, DAG);
5786 // No better options. Use a vshl / vsrl.
5787 EVT EltVT = VT.getVectorElementType();
5788 ShAmt *= EltVT.getSizeInBits();
5789 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
5792 bool Commuted = false;
5793 // FIXME: This should also accept a bitcast of a splat? Be careful, not
5794 // 1,1,1,1 -> v8i16 though.
5795 V1IsSplat = isSplatVector(V1.getNode());
5796 V2IsSplat = isSplatVector(V2.getNode());
5798 // Canonicalize the splat or undef, if present, to be on the RHS.
5799 if ((V1IsSplat || V1IsUndef) && !(V2IsSplat || V2IsUndef)) {
5800 Op = CommuteVectorShuffle(SVOp, DAG);
5801 SVOp = cast<ShuffleVectorSDNode>(Op);
5802 V1 = SVOp->getOperand(0);
5803 V2 = SVOp->getOperand(1);
5804 std::swap(V1IsSplat, V2IsSplat);
5805 std::swap(V1IsUndef, V2IsUndef);
5809 if (isCommutedMOVL(SVOp, V2IsSplat, V2IsUndef)) {
5810 // Shuffling low element of v1 into undef, just return v1.
5813 // If V2 is a splat, the mask may be malformed such as <4,3,3,3>, which
5814 // the instruction selector will not match, so get a canonical MOVL with
5815 // swapped operands to undo the commute.
5816 return getMOVL(DAG, dl, VT, V2, V1);
5819 if (X86::isUNPCKLMask(SVOp))
5820 return getTargetShuffleNode(getUNPCKLOpcode(VT, getSubtarget()),
5821 dl, VT, V1, V2, DAG);
5823 if (X86::isUNPCKHMask(SVOp))
5824 return getTargetShuffleNode(getUNPCKHOpcode(VT), dl, VT, V1, V2, DAG);
5827 // Normalize mask so all entries that point to V2 points to its first
5828 // element then try to match unpck{h|l} again. If match, return a
5829 // new vector_shuffle with the corrected mask.
5830 SDValue NewMask = NormalizeMask(SVOp, DAG);
5831 ShuffleVectorSDNode *NSVOp = cast<ShuffleVectorSDNode>(NewMask);
5832 if (NSVOp != SVOp) {
5833 if (X86::isUNPCKLMask(NSVOp, true)) {
5835 } else if (X86::isUNPCKHMask(NSVOp, true)) {
5842 // Commute is back and try unpck* again.
5843 // FIXME: this seems wrong.
5844 SDValue NewOp = CommuteVectorShuffle(SVOp, DAG);
5845 ShuffleVectorSDNode *NewSVOp = cast<ShuffleVectorSDNode>(NewOp);
5847 if (X86::isUNPCKLMask(NewSVOp))
5848 return getTargetShuffleNode(getUNPCKLOpcode(VT, getSubtarget()),
5849 dl, VT, V2, V1, DAG);
5851 if (X86::isUNPCKHMask(NewSVOp))
5852 return getTargetShuffleNode(getUNPCKHOpcode(VT), dl, VT, V2, V1, DAG);
5855 // Normalize the node to match x86 shuffle ops if needed
5856 if (V2.getOpcode() != ISD::UNDEF && isCommutedSHUFP(SVOp))
5857 return CommuteVectorShuffle(SVOp, DAG);
5859 // The checks below are all present in isShuffleMaskLegal, but they are
5860 // inlined here right now to enable us to directly emit target specific
5861 // nodes, and remove one by one until they don't return Op anymore.
5862 SmallVector<int, 16> M;
5865 if (isPALIGNRMask(M, VT, HasSSSE3))
5866 return getTargetShuffleNode(X86ISD::PALIGN, dl, VT, V1, V2,
5867 X86::getShufflePALIGNRImmediate(SVOp),
5870 if (ShuffleVectorSDNode::isSplatMask(&M[0], VT) &&
5871 SVOp->getSplatIndex() == 0 && V2IsUndef) {
5872 if (VT == MVT::v2f64) {
5873 X86ISD::NodeType Opcode =
5874 getSubtarget()->hasAVX() ? X86ISD::VUNPCKLPD : X86ISD::UNPCKLPD;
5875 return getTargetShuffleNode(Opcode, dl, VT, V1, V1, DAG);
5877 if (VT == MVT::v2i64)
5878 return getTargetShuffleNode(X86ISD::PUNPCKLQDQ, dl, VT, V1, V1, DAG);
5881 if (isPSHUFHWMask(M, VT))
5882 return getTargetShuffleNode(X86ISD::PSHUFHW, dl, VT, V1,
5883 X86::getShufflePSHUFHWImmediate(SVOp),
5886 if (isPSHUFLWMask(M, VT))
5887 return getTargetShuffleNode(X86ISD::PSHUFLW, dl, VT, V1,
5888 X86::getShufflePSHUFLWImmediate(SVOp),
5891 if (isSHUFPMask(M, VT)) {
5892 unsigned TargetMask = X86::getShuffleSHUFImmediate(SVOp);
5893 if (VT == MVT::v4f32 || VT == MVT::v4i32)
5894 return getTargetShuffleNode(X86ISD::SHUFPS, dl, VT, V1, V2,
5896 if (VT == MVT::v2f64 || VT == MVT::v2i64)
5897 return getTargetShuffleNode(X86ISD::SHUFPD, dl, VT, V1, V2,
5901 if (X86::isUNPCKL_v_undef_Mask(SVOp))
5902 if (VT != MVT::v2i64 && VT != MVT::v2f64)
5903 return getTargetShuffleNode(getUNPCKLOpcode(VT, getSubtarget()),
5904 dl, VT, V1, V1, DAG);
5905 if (X86::isUNPCKH_v_undef_Mask(SVOp))
5906 if (VT != MVT::v2i64 && VT != MVT::v2f64)
5907 return getTargetShuffleNode(getUNPCKHOpcode(VT), dl, VT, V1, V1, DAG);
5909 // Handle v8i16 specifically since SSE can do byte extraction and insertion.
5910 if (VT == MVT::v8i16) {
5911 SDValue NewOp = LowerVECTOR_SHUFFLEv8i16(Op, DAG);
5912 if (NewOp.getNode())
5916 if (VT == MVT::v16i8) {
5917 SDValue NewOp = LowerVECTOR_SHUFFLEv16i8(SVOp, DAG, *this);
5918 if (NewOp.getNode())
5922 // Handle all 4 wide cases with a number of shuffles.
5924 return LowerVECTOR_SHUFFLE_4wide(SVOp, DAG);
5930 X86TargetLowering::LowerEXTRACT_VECTOR_ELT_SSE4(SDValue Op,
5931 SelectionDAG &DAG) const {
5932 EVT VT = Op.getValueType();
5933 DebugLoc dl = Op.getDebugLoc();
5934 if (VT.getSizeInBits() == 8) {
5935 SDValue Extract = DAG.getNode(X86ISD::PEXTRB, dl, MVT::i32,
5936 Op.getOperand(0), Op.getOperand(1));
5937 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
5938 DAG.getValueType(VT));
5939 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
5940 } else if (VT.getSizeInBits() == 16) {
5941 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
5942 // If Idx is 0, it's cheaper to do a move instead of a pextrw.
5944 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
5945 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
5946 DAG.getNode(ISD::BITCAST, dl,
5950 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, MVT::i32,
5951 Op.getOperand(0), Op.getOperand(1));
5952 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
5953 DAG.getValueType(VT));
5954 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
5955 } else if (VT == MVT::f32) {
5956 // EXTRACTPS outputs to a GPR32 register which will require a movd to copy
5957 // the result back to FR32 register. It's only worth matching if the
5958 // result has a single use which is a store or a bitcast to i32. And in
5959 // the case of a store, it's not worth it if the index is a constant 0,
5960 // because a MOVSSmr can be used instead, which is smaller and faster.
5961 if (!Op.hasOneUse())
5963 SDNode *User = *Op.getNode()->use_begin();
5964 if ((User->getOpcode() != ISD::STORE ||
5965 (isa<ConstantSDNode>(Op.getOperand(1)) &&
5966 cast<ConstantSDNode>(Op.getOperand(1))->isNullValue())) &&
5967 (User->getOpcode() != ISD::BITCAST ||
5968 User->getValueType(0) != MVT::i32))
5970 SDValue Extract = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
5971 DAG.getNode(ISD::BITCAST, dl, MVT::v4i32,
5974 return DAG.getNode(ISD::BITCAST, dl, MVT::f32, Extract);
5975 } else if (VT == MVT::i32) {
5976 // ExtractPS works with constant index.
5977 if (isa<ConstantSDNode>(Op.getOperand(1)))
5985 X86TargetLowering::LowerEXTRACT_VECTOR_ELT(SDValue Op,
5986 SelectionDAG &DAG) const {
5987 if (!isa<ConstantSDNode>(Op.getOperand(1)))
5990 SDValue Vec = Op.getOperand(0);
5991 EVT VecVT = Vec.getValueType();
5993 // If this is a 256-bit vector result, first extract the 128-bit
5994 // vector and then extract from the 128-bit vector.
5995 if (VecVT.getSizeInBits() > 128) {
5996 DebugLoc dl = Op.getNode()->getDebugLoc();
5997 unsigned NumElems = VecVT.getVectorNumElements();
5998 SDValue Idx = Op.getOperand(1);
6000 if (!isa<ConstantSDNode>(Idx))
6003 unsigned ExtractNumElems = NumElems / (VecVT.getSizeInBits() / 128);
6004 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
6006 // Get the 128-bit vector.
6007 bool Upper = IdxVal >= ExtractNumElems;
6008 Vec = Extract128BitVector(Vec, Idx, DAG, dl);
6011 SDValue ScaledIdx = Idx;
6013 ScaledIdx = DAG.getNode(ISD::SUB, dl, Idx.getValueType(), Idx,
6014 DAG.getConstant(ExtractNumElems,
6015 Idx.getValueType()));
6016 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, Op.getValueType(), Vec,
6020 assert(Vec.getValueSizeInBits() <= 128 && "Unexpected vector length");
6022 if (Subtarget->hasSSE41()) {
6023 SDValue Res = LowerEXTRACT_VECTOR_ELT_SSE4(Op, DAG);
6028 EVT VT = Op.getValueType();
6029 DebugLoc dl = Op.getDebugLoc();
6030 // TODO: handle v16i8.
6031 if (VT.getSizeInBits() == 16) {
6032 SDValue Vec = Op.getOperand(0);
6033 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6035 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
6036 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
6037 DAG.getNode(ISD::BITCAST, dl,
6040 // Transform it so it match pextrw which produces a 32-bit result.
6041 EVT EltVT = MVT::i32;
6042 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, EltVT,
6043 Op.getOperand(0), Op.getOperand(1));
6044 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, EltVT, Extract,
6045 DAG.getValueType(VT));
6046 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
6047 } else if (VT.getSizeInBits() == 32) {
6048 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6052 // SHUFPS the element to the lowest double word, then movss.
6053 int Mask[4] = { Idx, -1, -1, -1 };
6054 EVT VVT = Op.getOperand(0).getValueType();
6055 SDValue Vec = DAG.getVectorShuffle(VVT, dl, Op.getOperand(0),
6056 DAG.getUNDEF(VVT), Mask);
6057 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
6058 DAG.getIntPtrConstant(0));
6059 } else if (VT.getSizeInBits() == 64) {
6060 // FIXME: .td only matches this for <2 x f64>, not <2 x i64> on 32b
6061 // FIXME: seems like this should be unnecessary if mov{h,l}pd were taught
6062 // to match extract_elt for f64.
6063 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6067 // UNPCKHPD the element to the lowest double word, then movsd.
6068 // Note if the lower 64 bits of the result of the UNPCKHPD is then stored
6069 // to a f64mem, the whole operation is folded into a single MOVHPDmr.
6070 int Mask[2] = { 1, -1 };
6071 EVT VVT = Op.getOperand(0).getValueType();
6072 SDValue Vec = DAG.getVectorShuffle(VVT, dl, Op.getOperand(0),
6073 DAG.getUNDEF(VVT), Mask);
6074 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
6075 DAG.getIntPtrConstant(0));
6082 X86TargetLowering::LowerINSERT_VECTOR_ELT_SSE4(SDValue Op,
6083 SelectionDAG &DAG) const {
6084 EVT VT = Op.getValueType();
6085 EVT EltVT = VT.getVectorElementType();
6086 DebugLoc dl = Op.getDebugLoc();
6088 SDValue N0 = Op.getOperand(0);
6089 SDValue N1 = Op.getOperand(1);
6090 SDValue N2 = Op.getOperand(2);
6092 if ((EltVT.getSizeInBits() == 8 || EltVT.getSizeInBits() == 16) &&
6093 isa<ConstantSDNode>(N2)) {
6095 if (VT == MVT::v8i16)
6096 Opc = X86ISD::PINSRW;
6097 else if (VT == MVT::v16i8)
6098 Opc = X86ISD::PINSRB;
6100 Opc = X86ISD::PINSRB;
6102 // Transform it so it match pinsr{b,w} which expects a GR32 as its second
6104 if (N1.getValueType() != MVT::i32)
6105 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
6106 if (N2.getValueType() != MVT::i32)
6107 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
6108 return DAG.getNode(Opc, dl, VT, N0, N1, N2);
6109 } else if (EltVT == MVT::f32 && isa<ConstantSDNode>(N2)) {
6110 // Bits [7:6] of the constant are the source select. This will always be
6111 // zero here. The DAG Combiner may combine an extract_elt index into these
6112 // bits. For example (insert (extract, 3), 2) could be matched by putting
6113 // the '3' into bits [7:6] of X86ISD::INSERTPS.
6114 // Bits [5:4] of the constant are the destination select. This is the
6115 // value of the incoming immediate.
6116 // Bits [3:0] of the constant are the zero mask. The DAG Combiner may
6117 // combine either bitwise AND or insert of float 0.0 to set these bits.
6118 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue() << 4);
6119 // Create this as a scalar to vector..
6120 N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4f32, N1);
6121 return DAG.getNode(X86ISD::INSERTPS, dl, VT, N0, N1, N2);
6122 } else if (EltVT == MVT::i32 && isa<ConstantSDNode>(N2)) {
6123 // PINSR* works with constant index.
6130 X86TargetLowering::LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const {
6131 EVT VT = Op.getValueType();
6132 EVT EltVT = VT.getVectorElementType();
6134 DebugLoc dl = Op.getDebugLoc();
6135 SDValue N0 = Op.getOperand(0);
6136 SDValue N1 = Op.getOperand(1);
6137 SDValue N2 = Op.getOperand(2);
6139 // If this is a 256-bit vector result, first insert into a 128-bit
6140 // vector and then insert into the 256-bit vector.
6141 if (VT.getSizeInBits() > 128) {
6142 if (!isa<ConstantSDNode>(N2))
6145 // Get the 128-bit vector.
6146 unsigned NumElems = VT.getVectorNumElements();
6147 unsigned IdxVal = cast<ConstantSDNode>(N2)->getZExtValue();
6148 bool Upper = IdxVal >= NumElems / 2;
6150 SDValue SubN0 = Extract128BitVector(N0, N2, DAG, dl);
6153 SDValue ScaledN2 = N2;
6155 ScaledN2 = DAG.getNode(ISD::SUB, dl, N2.getValueType(), N2,
6156 DAG.getConstant(NumElems /
6157 (VT.getSizeInBits() / 128),
6158 N2.getValueType()));
6159 Op = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, SubN0.getValueType(), SubN0,
6162 // Insert the 128-bit vector
6163 // FIXME: Why UNDEF?
6164 return Insert128BitVector(N0, Op, N2, DAG, dl);
6167 if (Subtarget->hasSSE41())
6168 return LowerINSERT_VECTOR_ELT_SSE4(Op, DAG);
6170 if (EltVT == MVT::i8)
6173 if (EltVT.getSizeInBits() == 16 && isa<ConstantSDNode>(N2)) {
6174 // Transform it so it match pinsrw which expects a 16-bit value in a GR32
6175 // as its second argument.
6176 if (N1.getValueType() != MVT::i32)
6177 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
6178 if (N2.getValueType() != MVT::i32)
6179 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
6180 return DAG.getNode(X86ISD::PINSRW, dl, VT, N0, N1, N2);
6186 X86TargetLowering::LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) const {
6187 LLVMContext *Context = DAG.getContext();
6188 DebugLoc dl = Op.getDebugLoc();
6189 EVT OpVT = Op.getValueType();
6191 // If this is a 256-bit vector result, first insert into a 128-bit
6192 // vector and then insert into the 256-bit vector.
6193 if (OpVT.getSizeInBits() > 128) {
6194 // Insert into a 128-bit vector.
6195 EVT VT128 = EVT::getVectorVT(*Context,
6196 OpVT.getVectorElementType(),
6197 OpVT.getVectorNumElements() / 2);
6199 Op = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT128, Op.getOperand(0));
6201 // Insert the 128-bit vector.
6202 return Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, OpVT), Op,
6203 DAG.getConstant(0, MVT::i32),
6207 if (Op.getValueType() == MVT::v1i64 &&
6208 Op.getOperand(0).getValueType() == MVT::i64)
6209 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v1i64, Op.getOperand(0));
6211 SDValue AnyExt = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, Op.getOperand(0));
6212 assert(Op.getValueType().getSimpleVT().getSizeInBits() == 128 &&
6213 "Expected an SSE type!");
6214 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(),
6215 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,AnyExt));
6218 // Lower a node with an EXTRACT_SUBVECTOR opcode. This may result in
6219 // a simple subregister reference or explicit instructions to grab
6220 // upper bits of a vector.
6222 X86TargetLowering::LowerEXTRACT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const {
6223 if (Subtarget->hasAVX()) {
6224 DebugLoc dl = Op.getNode()->getDebugLoc();
6225 SDValue Vec = Op.getNode()->getOperand(0);
6226 SDValue Idx = Op.getNode()->getOperand(1);
6228 if (Op.getNode()->getValueType(0).getSizeInBits() == 128
6229 && Vec.getNode()->getValueType(0).getSizeInBits() == 256) {
6230 return Extract128BitVector(Vec, Idx, DAG, dl);
6236 // Lower a node with an INSERT_SUBVECTOR opcode. This may result in a
6237 // simple superregister reference or explicit instructions to insert
6238 // the upper bits of a vector.
6240 X86TargetLowering::LowerINSERT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const {
6241 if (Subtarget->hasAVX()) {
6242 DebugLoc dl = Op.getNode()->getDebugLoc();
6243 SDValue Vec = Op.getNode()->getOperand(0);
6244 SDValue SubVec = Op.getNode()->getOperand(1);
6245 SDValue Idx = Op.getNode()->getOperand(2);
6247 if (Op.getNode()->getValueType(0).getSizeInBits() == 256
6248 && SubVec.getNode()->getValueType(0).getSizeInBits() == 128) {
6249 return Insert128BitVector(Vec, SubVec, Idx, DAG, dl);
6255 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
6256 // their target countpart wrapped in the X86ISD::Wrapper node. Suppose N is
6257 // one of the above mentioned nodes. It has to be wrapped because otherwise
6258 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
6259 // be used to form addressing mode. These wrapped nodes will be selected
6262 X86TargetLowering::LowerConstantPool(SDValue Op, SelectionDAG &DAG) const {
6263 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
6265 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
6267 unsigned char OpFlag = 0;
6268 unsigned WrapperKind = X86ISD::Wrapper;
6269 CodeModel::Model M = getTargetMachine().getCodeModel();
6271 if (Subtarget->isPICStyleRIPRel() &&
6272 (M == CodeModel::Small || M == CodeModel::Kernel))
6273 WrapperKind = X86ISD::WrapperRIP;
6274 else if (Subtarget->isPICStyleGOT())
6275 OpFlag = X86II::MO_GOTOFF;
6276 else if (Subtarget->isPICStyleStubPIC())
6277 OpFlag = X86II::MO_PIC_BASE_OFFSET;
6279 SDValue Result = DAG.getTargetConstantPool(CP->getConstVal(), getPointerTy(),
6281 CP->getOffset(), OpFlag);
6282 DebugLoc DL = CP->getDebugLoc();
6283 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
6284 // With PIC, the address is actually $g + Offset.
6286 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
6287 DAG.getNode(X86ISD::GlobalBaseReg,
6288 DebugLoc(), getPointerTy()),
6295 SDValue X86TargetLowering::LowerJumpTable(SDValue Op, SelectionDAG &DAG) const {
6296 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
6298 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
6300 unsigned char OpFlag = 0;
6301 unsigned WrapperKind = X86ISD::Wrapper;
6302 CodeModel::Model M = getTargetMachine().getCodeModel();
6304 if (Subtarget->isPICStyleRIPRel() &&
6305 (M == CodeModel::Small || M == CodeModel::Kernel))
6306 WrapperKind = X86ISD::WrapperRIP;
6307 else if (Subtarget->isPICStyleGOT())
6308 OpFlag = X86II::MO_GOTOFF;
6309 else if (Subtarget->isPICStyleStubPIC())
6310 OpFlag = X86II::MO_PIC_BASE_OFFSET;
6312 SDValue Result = DAG.getTargetJumpTable(JT->getIndex(), getPointerTy(),
6314 DebugLoc DL = JT->getDebugLoc();
6315 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
6317 // With PIC, the address is actually $g + Offset.
6319 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
6320 DAG.getNode(X86ISD::GlobalBaseReg,
6321 DebugLoc(), getPointerTy()),
6328 X86TargetLowering::LowerExternalSymbol(SDValue Op, SelectionDAG &DAG) const {
6329 const char *Sym = cast<ExternalSymbolSDNode>(Op)->getSymbol();
6331 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
6333 unsigned char OpFlag = 0;
6334 unsigned WrapperKind = X86ISD::Wrapper;
6335 CodeModel::Model M = getTargetMachine().getCodeModel();
6337 if (Subtarget->isPICStyleRIPRel() &&
6338 (M == CodeModel::Small || M == CodeModel::Kernel))
6339 WrapperKind = X86ISD::WrapperRIP;
6340 else if (Subtarget->isPICStyleGOT())
6341 OpFlag = X86II::MO_GOTOFF;
6342 else if (Subtarget->isPICStyleStubPIC())
6343 OpFlag = X86II::MO_PIC_BASE_OFFSET;
6345 SDValue Result = DAG.getTargetExternalSymbol(Sym, getPointerTy(), OpFlag);
6347 DebugLoc DL = Op.getDebugLoc();
6348 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
6351 // With PIC, the address is actually $g + Offset.
6352 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
6353 !Subtarget->is64Bit()) {
6354 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
6355 DAG.getNode(X86ISD::GlobalBaseReg,
6356 DebugLoc(), getPointerTy()),
6364 X86TargetLowering::LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const {
6365 // Create the TargetBlockAddressAddress node.
6366 unsigned char OpFlags =
6367 Subtarget->ClassifyBlockAddressReference();
6368 CodeModel::Model M = getTargetMachine().getCodeModel();
6369 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
6370 DebugLoc dl = Op.getDebugLoc();
6371 SDValue Result = DAG.getBlockAddress(BA, getPointerTy(),
6372 /*isTarget=*/true, OpFlags);
6374 if (Subtarget->isPICStyleRIPRel() &&
6375 (M == CodeModel::Small || M == CodeModel::Kernel))
6376 Result = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Result);
6378 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
6380 // With PIC, the address is actually $g + Offset.
6381 if (isGlobalRelativeToPICBase(OpFlags)) {
6382 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
6383 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
6391 X86TargetLowering::LowerGlobalAddress(const GlobalValue *GV, DebugLoc dl,
6393 SelectionDAG &DAG) const {
6394 // Create the TargetGlobalAddress node, folding in the constant
6395 // offset if it is legal.
6396 unsigned char OpFlags =
6397 Subtarget->ClassifyGlobalReference(GV, getTargetMachine());
6398 CodeModel::Model M = getTargetMachine().getCodeModel();
6400 if (OpFlags == X86II::MO_NO_FLAG &&
6401 X86::isOffsetSuitableForCodeModel(Offset, M)) {
6402 // A direct static reference to a global.
6403 Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), Offset);
6406 Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), 0, OpFlags);
6409 if (Subtarget->isPICStyleRIPRel() &&
6410 (M == CodeModel::Small || M == CodeModel::Kernel))
6411 Result = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Result);
6413 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
6415 // With PIC, the address is actually $g + Offset.
6416 if (isGlobalRelativeToPICBase(OpFlags)) {
6417 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
6418 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
6422 // For globals that require a load from a stub to get the address, emit the
6424 if (isGlobalStubReference(OpFlags))
6425 Result = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(), Result,
6426 MachinePointerInfo::getGOT(), false, false, 0);
6428 // If there was a non-zero offset that we didn't fold, create an explicit
6431 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(), Result,
6432 DAG.getConstant(Offset, getPointerTy()));
6438 X86TargetLowering::LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const {
6439 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
6440 int64_t Offset = cast<GlobalAddressSDNode>(Op)->getOffset();
6441 return LowerGlobalAddress(GV, Op.getDebugLoc(), Offset, DAG);
6445 GetTLSADDR(SelectionDAG &DAG, SDValue Chain, GlobalAddressSDNode *GA,
6446 SDValue *InFlag, const EVT PtrVT, unsigned ReturnReg,
6447 unsigned char OperandFlags) {
6448 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
6449 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
6450 DebugLoc dl = GA->getDebugLoc();
6451 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
6452 GA->getValueType(0),
6456 SDValue Ops[] = { Chain, TGA, *InFlag };
6457 Chain = DAG.getNode(X86ISD::TLSADDR, dl, NodeTys, Ops, 3);
6459 SDValue Ops[] = { Chain, TGA };
6460 Chain = DAG.getNode(X86ISD::TLSADDR, dl, NodeTys, Ops, 2);
6463 // TLSADDR will be codegen'ed as call. Inform MFI that function has calls.
6464 MFI->setAdjustsStack(true);
6466 SDValue Flag = Chain.getValue(1);
6467 return DAG.getCopyFromReg(Chain, dl, ReturnReg, PtrVT, Flag);
6470 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 32 bit
6472 LowerToTLSGeneralDynamicModel32(GlobalAddressSDNode *GA, SelectionDAG &DAG,
6475 DebugLoc dl = GA->getDebugLoc(); // ? function entry point might be better
6476 SDValue Chain = DAG.getCopyToReg(DAG.getEntryNode(), dl, X86::EBX,
6477 DAG.getNode(X86ISD::GlobalBaseReg,
6478 DebugLoc(), PtrVT), InFlag);
6479 InFlag = Chain.getValue(1);
6481 return GetTLSADDR(DAG, Chain, GA, &InFlag, PtrVT, X86::EAX, X86II::MO_TLSGD);
6484 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 64 bit
6486 LowerToTLSGeneralDynamicModel64(GlobalAddressSDNode *GA, SelectionDAG &DAG,
6488 return GetTLSADDR(DAG, DAG.getEntryNode(), GA, NULL, PtrVT,
6489 X86::RAX, X86II::MO_TLSGD);
6492 // Lower ISD::GlobalTLSAddress using the "initial exec" (for no-pic) or
6493 // "local exec" model.
6494 static SDValue LowerToTLSExecModel(GlobalAddressSDNode *GA, SelectionDAG &DAG,
6495 const EVT PtrVT, TLSModel::Model model,
6497 DebugLoc dl = GA->getDebugLoc();
6499 // Get the Thread Pointer, which is %gs:0 (32-bit) or %fs:0 (64-bit).
6500 Value *Ptr = Constant::getNullValue(Type::getInt8PtrTy(*DAG.getContext(),
6501 is64Bit ? 257 : 256));
6503 SDValue ThreadPointer = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
6504 DAG.getIntPtrConstant(0),
6505 MachinePointerInfo(Ptr), false, false, 0);
6507 unsigned char OperandFlags = 0;
6508 // Most TLS accesses are not RIP relative, even on x86-64. One exception is
6510 unsigned WrapperKind = X86ISD::Wrapper;
6511 if (model == TLSModel::LocalExec) {
6512 OperandFlags = is64Bit ? X86II::MO_TPOFF : X86II::MO_NTPOFF;
6513 } else if (is64Bit) {
6514 assert(model == TLSModel::InitialExec);
6515 OperandFlags = X86II::MO_GOTTPOFF;
6516 WrapperKind = X86ISD::WrapperRIP;
6518 assert(model == TLSModel::InitialExec);
6519 OperandFlags = X86II::MO_INDNTPOFF;
6522 // emit "addl x@ntpoff,%eax" (local exec) or "addl x@indntpoff,%eax" (initial
6524 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
6525 GA->getValueType(0),
6526 GA->getOffset(), OperandFlags);
6527 SDValue Offset = DAG.getNode(WrapperKind, dl, PtrVT, TGA);
6529 if (model == TLSModel::InitialExec)
6530 Offset = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Offset,
6531 MachinePointerInfo::getGOT(), false, false, 0);
6533 // The address of the thread local variable is the add of the thread
6534 // pointer with the offset of the variable.
6535 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
6539 X86TargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const {
6541 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
6542 const GlobalValue *GV = GA->getGlobal();
6544 if (Subtarget->isTargetELF()) {
6545 // TODO: implement the "local dynamic" model
6546 // TODO: implement the "initial exec"model for pic executables
6548 // If GV is an alias then use the aliasee for determining
6549 // thread-localness.
6550 if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV))
6551 GV = GA->resolveAliasedGlobal(false);
6553 TLSModel::Model model
6554 = getTLSModel(GV, getTargetMachine().getRelocationModel());
6557 case TLSModel::GeneralDynamic:
6558 case TLSModel::LocalDynamic: // not implemented
6559 if (Subtarget->is64Bit())
6560 return LowerToTLSGeneralDynamicModel64(GA, DAG, getPointerTy());
6561 return LowerToTLSGeneralDynamicModel32(GA, DAG, getPointerTy());
6563 case TLSModel::InitialExec:
6564 case TLSModel::LocalExec:
6565 return LowerToTLSExecModel(GA, DAG, getPointerTy(), model,
6566 Subtarget->is64Bit());
6568 } else if (Subtarget->isTargetDarwin()) {
6569 // Darwin only has one model of TLS. Lower to that.
6570 unsigned char OpFlag = 0;
6571 unsigned WrapperKind = Subtarget->isPICStyleRIPRel() ?
6572 X86ISD::WrapperRIP : X86ISD::Wrapper;
6574 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
6576 bool PIC32 = (getTargetMachine().getRelocationModel() == Reloc::PIC_) &&
6577 !Subtarget->is64Bit();
6579 OpFlag = X86II::MO_TLVP_PIC_BASE;
6581 OpFlag = X86II::MO_TLVP;
6582 DebugLoc DL = Op.getDebugLoc();
6583 SDValue Result = DAG.getTargetGlobalAddress(GA->getGlobal(), DL,
6584 GA->getValueType(0),
6585 GA->getOffset(), OpFlag);
6586 SDValue Offset = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
6588 // With PIC32, the address is actually $g + Offset.
6590 Offset = DAG.getNode(ISD::ADD, DL, getPointerTy(),
6591 DAG.getNode(X86ISD::GlobalBaseReg,
6592 DebugLoc(), getPointerTy()),
6595 // Lowering the machine isd will make sure everything is in the right
6597 SDValue Chain = DAG.getEntryNode();
6598 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
6599 SDValue Args[] = { Chain, Offset };
6600 Chain = DAG.getNode(X86ISD::TLSCALL, DL, NodeTys, Args, 2);
6602 // TLSCALL will be codegen'ed as call. Inform MFI that function has calls.
6603 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
6604 MFI->setAdjustsStack(true);
6606 // And our return value (tls address) is in the standard call return value
6608 unsigned Reg = Subtarget->is64Bit() ? X86::RAX : X86::EAX;
6609 return DAG.getCopyFromReg(Chain, DL, Reg, getPointerTy());
6613 "TLS not implemented for this target.");
6615 llvm_unreachable("Unreachable");
6620 /// LowerShift - Lower SRA_PARTS and friends, which return two i32 values and
6621 /// take a 2 x i32 value to shift plus a shift amount.
6622 SDValue X86TargetLowering::LowerShift(SDValue Op, SelectionDAG &DAG) const {
6623 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
6624 EVT VT = Op.getValueType();
6625 unsigned VTBits = VT.getSizeInBits();
6626 DebugLoc dl = Op.getDebugLoc();
6627 bool isSRA = Op.getOpcode() == ISD::SRA_PARTS;
6628 SDValue ShOpLo = Op.getOperand(0);
6629 SDValue ShOpHi = Op.getOperand(1);
6630 SDValue ShAmt = Op.getOperand(2);
6631 SDValue Tmp1 = isSRA ? DAG.getNode(ISD::SRA, dl, VT, ShOpHi,
6632 DAG.getConstant(VTBits - 1, MVT::i8))
6633 : DAG.getConstant(0, VT);
6636 if (Op.getOpcode() == ISD::SHL_PARTS) {
6637 Tmp2 = DAG.getNode(X86ISD::SHLD, dl, VT, ShOpHi, ShOpLo, ShAmt);
6638 Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt);
6640 Tmp2 = DAG.getNode(X86ISD::SHRD, dl, VT, ShOpLo, ShOpHi, ShAmt);
6641 Tmp3 = DAG.getNode(isSRA ? ISD::SRA : ISD::SRL, dl, VT, ShOpHi, ShAmt);
6644 SDValue AndNode = DAG.getNode(ISD::AND, dl, MVT::i8, ShAmt,
6645 DAG.getConstant(VTBits, MVT::i8));
6646 SDValue Cond = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
6647 AndNode, DAG.getConstant(0, MVT::i8));
6650 SDValue CC = DAG.getConstant(X86::COND_NE, MVT::i8);
6651 SDValue Ops0[4] = { Tmp2, Tmp3, CC, Cond };
6652 SDValue Ops1[4] = { Tmp3, Tmp1, CC, Cond };
6654 if (Op.getOpcode() == ISD::SHL_PARTS) {
6655 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0, 4);
6656 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1, 4);
6658 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0, 4);
6659 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1, 4);
6662 SDValue Ops[2] = { Lo, Hi };
6663 return DAG.getMergeValues(Ops, 2, dl);
6666 SDValue X86TargetLowering::LowerSINT_TO_FP(SDValue Op,
6667 SelectionDAG &DAG) const {
6668 EVT SrcVT = Op.getOperand(0).getValueType();
6670 if (SrcVT.isVector())
6673 assert(SrcVT.getSimpleVT() <= MVT::i64 && SrcVT.getSimpleVT() >= MVT::i16 &&
6674 "Unknown SINT_TO_FP to lower!");
6676 // These are really Legal; return the operand so the caller accepts it as
6678 if (SrcVT == MVT::i32 && isScalarFPTypeInSSEReg(Op.getValueType()))
6680 if (SrcVT == MVT::i64 && isScalarFPTypeInSSEReg(Op.getValueType()) &&
6681 Subtarget->is64Bit()) {
6685 DebugLoc dl = Op.getDebugLoc();
6686 unsigned Size = SrcVT.getSizeInBits()/8;
6687 MachineFunction &MF = DAG.getMachineFunction();
6688 int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size, false);
6689 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
6690 SDValue Chain = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
6692 MachinePointerInfo::getFixedStack(SSFI),
6694 return BuildFILD(Op, SrcVT, Chain, StackSlot, DAG);
6697 SDValue X86TargetLowering::BuildFILD(SDValue Op, EVT SrcVT, SDValue Chain,
6699 SelectionDAG &DAG) const {
6701 DebugLoc DL = Op.getDebugLoc();
6703 bool useSSE = isScalarFPTypeInSSEReg(Op.getValueType());
6705 Tys = DAG.getVTList(MVT::f64, MVT::Other, MVT::Glue);
6707 Tys = DAG.getVTList(Op.getValueType(), MVT::Other);
6709 unsigned ByteSize = SrcVT.getSizeInBits()/8;
6711 int SSFI = cast<FrameIndexSDNode>(StackSlot)->getIndex();
6712 MachineMemOperand *MMO =
6713 DAG.getMachineFunction()
6714 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
6715 MachineMemOperand::MOLoad, ByteSize, ByteSize);
6717 SDValue Ops[] = { Chain, StackSlot, DAG.getValueType(SrcVT) };
6718 SDValue Result = DAG.getMemIntrinsicNode(useSSE ? X86ISD::FILD_FLAG :
6720 Tys, Ops, array_lengthof(Ops),
6724 Chain = Result.getValue(1);
6725 SDValue InFlag = Result.getValue(2);
6727 // FIXME: Currently the FST is flagged to the FILD_FLAG. This
6728 // shouldn't be necessary except that RFP cannot be live across
6729 // multiple blocks. When stackifier is fixed, they can be uncoupled.
6730 MachineFunction &MF = DAG.getMachineFunction();
6731 unsigned SSFISize = Op.getValueType().getSizeInBits()/8;
6732 int SSFI = MF.getFrameInfo()->CreateStackObject(SSFISize, SSFISize, false);
6733 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
6734 Tys = DAG.getVTList(MVT::Other);
6736 Chain, Result, StackSlot, DAG.getValueType(Op.getValueType()), InFlag
6738 MachineMemOperand *MMO =
6739 DAG.getMachineFunction()
6740 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
6741 MachineMemOperand::MOStore, SSFISize, SSFISize);
6743 Chain = DAG.getMemIntrinsicNode(X86ISD::FST, DL, Tys,
6744 Ops, array_lengthof(Ops),
6745 Op.getValueType(), MMO);
6746 Result = DAG.getLoad(Op.getValueType(), DL, Chain, StackSlot,
6747 MachinePointerInfo::getFixedStack(SSFI),
6754 // LowerUINT_TO_FP_i64 - 64-bit unsigned integer to double expansion.
6755 SDValue X86TargetLowering::LowerUINT_TO_FP_i64(SDValue Op,
6756 SelectionDAG &DAG) const {
6757 // This algorithm is not obvious. Here it is in C code, more or less:
6759 double uint64_to_double( uint32_t hi, uint32_t lo ) {
6760 static const __m128i exp = { 0x4330000045300000ULL, 0 };
6761 static const __m128d bias = { 0x1.0p84, 0x1.0p52 };
6763 // Copy ints to xmm registers.
6764 __m128i xh = _mm_cvtsi32_si128( hi );
6765 __m128i xl = _mm_cvtsi32_si128( lo );
6767 // Combine into low half of a single xmm register.
6768 __m128i x = _mm_unpacklo_epi32( xh, xl );
6772 // Merge in appropriate exponents to give the integer bits the right
6774 x = _mm_unpacklo_epi32( x, exp );
6776 // Subtract away the biases to deal with the IEEE-754 double precision
6778 d = _mm_sub_pd( (__m128d) x, bias );
6780 // All conversions up to here are exact. The correctly rounded result is
6781 // calculated using the current rounding mode using the following
6783 d = _mm_add_sd( d, _mm_unpackhi_pd( d, d ) );
6784 _mm_store_sd( &sd, d ); // Because we are returning doubles in XMM, this
6785 // store doesn't really need to be here (except
6786 // maybe to zero the other double)
6791 DebugLoc dl = Op.getDebugLoc();
6792 LLVMContext *Context = DAG.getContext();
6794 // Build some magic constants.
6795 std::vector<Constant*> CV0;
6796 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0x45300000)));
6797 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0x43300000)));
6798 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0)));
6799 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0)));
6800 Constant *C0 = ConstantVector::get(CV0);
6801 SDValue CPIdx0 = DAG.getConstantPool(C0, getPointerTy(), 16);
6803 std::vector<Constant*> CV1;
6805 ConstantFP::get(*Context, APFloat(APInt(64, 0x4530000000000000ULL))));
6807 ConstantFP::get(*Context, APFloat(APInt(64, 0x4330000000000000ULL))));
6808 Constant *C1 = ConstantVector::get(CV1);
6809 SDValue CPIdx1 = DAG.getConstantPool(C1, getPointerTy(), 16);
6811 SDValue XR1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,
6812 DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
6814 DAG.getIntPtrConstant(1)));
6815 SDValue XR2 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,
6816 DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
6818 DAG.getIntPtrConstant(0)));
6819 SDValue Unpck1 = getUnpackl(DAG, dl, MVT::v4i32, XR1, XR2);
6820 SDValue CLod0 = DAG.getLoad(MVT::v4i32, dl, DAG.getEntryNode(), CPIdx0,
6821 MachinePointerInfo::getConstantPool(),
6823 SDValue Unpck2 = getUnpackl(DAG, dl, MVT::v4i32, Unpck1, CLod0);
6824 SDValue XR2F = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Unpck2);
6825 SDValue CLod1 = DAG.getLoad(MVT::v2f64, dl, CLod0.getValue(1), CPIdx1,
6826 MachinePointerInfo::getConstantPool(),
6828 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::v2f64, XR2F, CLod1);
6830 // Add the halves; easiest way is to swap them into another reg first.
6831 int ShufMask[2] = { 1, -1 };
6832 SDValue Shuf = DAG.getVectorShuffle(MVT::v2f64, dl, Sub,
6833 DAG.getUNDEF(MVT::v2f64), ShufMask);
6834 SDValue Add = DAG.getNode(ISD::FADD, dl, MVT::v2f64, Shuf, Sub);
6835 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Add,
6836 DAG.getIntPtrConstant(0));
6839 // LowerUINT_TO_FP_i32 - 32-bit unsigned integer to float expansion.
6840 SDValue X86TargetLowering::LowerUINT_TO_FP_i32(SDValue Op,
6841 SelectionDAG &DAG) const {
6842 DebugLoc dl = Op.getDebugLoc();
6843 // FP constant to bias correct the final result.
6844 SDValue Bias = DAG.getConstantFP(BitsToDouble(0x4330000000000000ULL),
6847 // Load the 32-bit value into an XMM register.
6848 SDValue Load = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,
6849 DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
6851 DAG.getIntPtrConstant(0)));
6853 Load = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
6854 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Load),
6855 DAG.getIntPtrConstant(0));
6857 // Or the load with the bias.
6858 SDValue Or = DAG.getNode(ISD::OR, dl, MVT::v2i64,
6859 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
6860 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
6862 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
6863 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
6864 MVT::v2f64, Bias)));
6865 Or = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
6866 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Or),
6867 DAG.getIntPtrConstant(0));
6869 // Subtract the bias.
6870 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::f64, Or, Bias);
6872 // Handle final rounding.
6873 EVT DestVT = Op.getValueType();
6875 if (DestVT.bitsLT(MVT::f64)) {
6876 return DAG.getNode(ISD::FP_ROUND, dl, DestVT, Sub,
6877 DAG.getIntPtrConstant(0));
6878 } else if (DestVT.bitsGT(MVT::f64)) {
6879 return DAG.getNode(ISD::FP_EXTEND, dl, DestVT, Sub);
6882 // Handle final rounding.
6886 SDValue X86TargetLowering::LowerUINT_TO_FP(SDValue Op,
6887 SelectionDAG &DAG) const {
6888 SDValue N0 = Op.getOperand(0);
6889 DebugLoc dl = Op.getDebugLoc();
6891 // Since UINT_TO_FP is legal (it's marked custom), dag combiner won't
6892 // optimize it to a SINT_TO_FP when the sign bit is known zero. Perform
6893 // the optimization here.
6894 if (DAG.SignBitIsZero(N0))
6895 return DAG.getNode(ISD::SINT_TO_FP, dl, Op.getValueType(), N0);
6897 EVT SrcVT = N0.getValueType();
6898 EVT DstVT = Op.getValueType();
6899 if (SrcVT == MVT::i64 && DstVT == MVT::f64 && X86ScalarSSEf64)
6900 return LowerUINT_TO_FP_i64(Op, DAG);
6901 else if (SrcVT == MVT::i32 && X86ScalarSSEf64)
6902 return LowerUINT_TO_FP_i32(Op, DAG);
6904 // Make a 64-bit buffer, and use it to build an FILD.
6905 SDValue StackSlot = DAG.CreateStackTemporary(MVT::i64);
6906 if (SrcVT == MVT::i32) {
6907 SDValue WordOff = DAG.getConstant(4, getPointerTy());
6908 SDValue OffsetSlot = DAG.getNode(ISD::ADD, dl,
6909 getPointerTy(), StackSlot, WordOff);
6910 SDValue Store1 = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
6911 StackSlot, MachinePointerInfo(),
6913 SDValue Store2 = DAG.getStore(Store1, dl, DAG.getConstant(0, MVT::i32),
6914 OffsetSlot, MachinePointerInfo(),
6916 SDValue Fild = BuildFILD(Op, MVT::i64, Store2, StackSlot, DAG);
6920 assert(SrcVT == MVT::i64 && "Unexpected type in UINT_TO_FP");
6921 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
6922 StackSlot, MachinePointerInfo(),
6924 // For i64 source, we need to add the appropriate power of 2 if the input
6925 // was negative. This is the same as the optimization in
6926 // DAGTypeLegalizer::ExpandIntOp_UNIT_TO_FP, and for it to be safe here,
6927 // we must be careful to do the computation in x87 extended precision, not
6928 // in SSE. (The generic code can't know it's OK to do this, or how to.)
6929 int SSFI = cast<FrameIndexSDNode>(StackSlot)->getIndex();
6930 MachineMemOperand *MMO =
6931 DAG.getMachineFunction()
6932 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
6933 MachineMemOperand::MOLoad, 8, 8);
6935 SDVTList Tys = DAG.getVTList(MVT::f80, MVT::Other);
6936 SDValue Ops[] = { Store, StackSlot, DAG.getValueType(MVT::i64) };
6937 SDValue Fild = DAG.getMemIntrinsicNode(X86ISD::FILD, dl, Tys, Ops, 3,
6940 APInt FF(32, 0x5F800000ULL);
6942 // Check whether the sign bit is set.
6943 SDValue SignSet = DAG.getSetCC(dl, getSetCCResultType(MVT::i64),
6944 Op.getOperand(0), DAG.getConstant(0, MVT::i64),
6947 // Build a 64 bit pair (0, FF) in the constant pool, with FF in the lo bits.
6948 SDValue FudgePtr = DAG.getConstantPool(
6949 ConstantInt::get(*DAG.getContext(), FF.zext(64)),
6952 // Get a pointer to FF if the sign bit was set, or to 0 otherwise.
6953 SDValue Zero = DAG.getIntPtrConstant(0);
6954 SDValue Four = DAG.getIntPtrConstant(4);
6955 SDValue Offset = DAG.getNode(ISD::SELECT, dl, Zero.getValueType(), SignSet,
6957 FudgePtr = DAG.getNode(ISD::ADD, dl, getPointerTy(), FudgePtr, Offset);
6959 // Load the value out, extending it from f32 to f80.
6960 // FIXME: Avoid the extend by constructing the right constant pool?
6961 SDValue Fudge = DAG.getExtLoad(ISD::EXTLOAD, dl, MVT::f80, DAG.getEntryNode(),
6962 FudgePtr, MachinePointerInfo::getConstantPool(),
6963 MVT::f32, false, false, 4);
6964 // Extend everything to 80 bits to force it to be done on x87.
6965 SDValue Add = DAG.getNode(ISD::FADD, dl, MVT::f80, Fild, Fudge);
6966 return DAG.getNode(ISD::FP_ROUND, dl, DstVT, Add, DAG.getIntPtrConstant(0));
6969 std::pair<SDValue,SDValue> X86TargetLowering::
6970 FP_TO_INTHelper(SDValue Op, SelectionDAG &DAG, bool IsSigned) const {
6971 DebugLoc DL = Op.getDebugLoc();
6973 EVT DstTy = Op.getValueType();
6976 assert(DstTy == MVT::i32 && "Unexpected FP_TO_UINT");
6980 assert(DstTy.getSimpleVT() <= MVT::i64 &&
6981 DstTy.getSimpleVT() >= MVT::i16 &&
6982 "Unknown FP_TO_SINT to lower!");
6984 // These are really Legal.
6985 if (DstTy == MVT::i32 &&
6986 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
6987 return std::make_pair(SDValue(), SDValue());
6988 if (Subtarget->is64Bit() &&
6989 DstTy == MVT::i64 &&
6990 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
6991 return std::make_pair(SDValue(), SDValue());
6993 // We lower FP->sint64 into FISTP64, followed by a load, all to a temporary
6995 MachineFunction &MF = DAG.getMachineFunction();
6996 unsigned MemSize = DstTy.getSizeInBits()/8;
6997 int SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize, false);
6998 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7003 switch (DstTy.getSimpleVT().SimpleTy) {
7004 default: llvm_unreachable("Invalid FP_TO_SINT to lower!");
7005 case MVT::i16: Opc = X86ISD::FP_TO_INT16_IN_MEM; break;
7006 case MVT::i32: Opc = X86ISD::FP_TO_INT32_IN_MEM; break;
7007 case MVT::i64: Opc = X86ISD::FP_TO_INT64_IN_MEM; break;
7010 SDValue Chain = DAG.getEntryNode();
7011 SDValue Value = Op.getOperand(0);
7012 EVT TheVT = Op.getOperand(0).getValueType();
7013 if (isScalarFPTypeInSSEReg(TheVT)) {
7014 assert(DstTy == MVT::i64 && "Invalid FP_TO_SINT to lower!");
7015 Chain = DAG.getStore(Chain, DL, Value, StackSlot,
7016 MachinePointerInfo::getFixedStack(SSFI),
7018 SDVTList Tys = DAG.getVTList(Op.getOperand(0).getValueType(), MVT::Other);
7020 Chain, StackSlot, DAG.getValueType(TheVT)
7023 MachineMemOperand *MMO =
7024 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7025 MachineMemOperand::MOLoad, MemSize, MemSize);
7026 Value = DAG.getMemIntrinsicNode(X86ISD::FLD, DL, Tys, Ops, 3,
7028 Chain = Value.getValue(1);
7029 SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize, false);
7030 StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7033 MachineMemOperand *MMO =
7034 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7035 MachineMemOperand::MOStore, MemSize, MemSize);
7037 // Build the FP_TO_INT*_IN_MEM
7038 SDValue Ops[] = { Chain, Value, StackSlot };
7039 SDValue FIST = DAG.getMemIntrinsicNode(Opc, DL, DAG.getVTList(MVT::Other),
7040 Ops, 3, DstTy, MMO);
7042 return std::make_pair(FIST, StackSlot);
7045 SDValue X86TargetLowering::LowerFP_TO_SINT(SDValue Op,
7046 SelectionDAG &DAG) const {
7047 if (Op.getValueType().isVector())
7050 std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG, true);
7051 SDValue FIST = Vals.first, StackSlot = Vals.second;
7052 // If FP_TO_INTHelper failed, the node is actually supposed to be Legal.
7053 if (FIST.getNode() == 0) return Op;
7056 return DAG.getLoad(Op.getValueType(), Op.getDebugLoc(),
7057 FIST, StackSlot, MachinePointerInfo(), false, false, 0);
7060 SDValue X86TargetLowering::LowerFP_TO_UINT(SDValue Op,
7061 SelectionDAG &DAG) const {
7062 std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG, false);
7063 SDValue FIST = Vals.first, StackSlot = Vals.second;
7064 assert(FIST.getNode() && "Unexpected failure");
7067 return DAG.getLoad(Op.getValueType(), Op.getDebugLoc(),
7068 FIST, StackSlot, MachinePointerInfo(), false, false, 0);
7071 SDValue X86TargetLowering::LowerFABS(SDValue Op,
7072 SelectionDAG &DAG) const {
7073 LLVMContext *Context = DAG.getContext();
7074 DebugLoc dl = Op.getDebugLoc();
7075 EVT VT = Op.getValueType();
7078 EltVT = VT.getVectorElementType();
7079 std::vector<Constant*> CV;
7080 if (EltVT == MVT::f64) {
7081 Constant *C = ConstantFP::get(*Context, APFloat(APInt(64, ~(1ULL << 63))));
7085 Constant *C = ConstantFP::get(*Context, APFloat(APInt(32, ~(1U << 31))));
7091 Constant *C = ConstantVector::get(CV);
7092 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7093 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
7094 MachinePointerInfo::getConstantPool(),
7096 return DAG.getNode(X86ISD::FAND, dl, VT, Op.getOperand(0), Mask);
7099 SDValue X86TargetLowering::LowerFNEG(SDValue Op, SelectionDAG &DAG) const {
7100 LLVMContext *Context = DAG.getContext();
7101 DebugLoc dl = Op.getDebugLoc();
7102 EVT VT = Op.getValueType();
7105 EltVT = VT.getVectorElementType();
7106 std::vector<Constant*> CV;
7107 if (EltVT == MVT::f64) {
7108 Constant *C = ConstantFP::get(*Context, APFloat(APInt(64, 1ULL << 63)));
7112 Constant *C = ConstantFP::get(*Context, APFloat(APInt(32, 1U << 31)));
7118 Constant *C = ConstantVector::get(CV);
7119 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7120 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
7121 MachinePointerInfo::getConstantPool(),
7123 if (VT.isVector()) {
7124 return DAG.getNode(ISD::BITCAST, dl, VT,
7125 DAG.getNode(ISD::XOR, dl, MVT::v2i64,
7126 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
7128 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, Mask)));
7130 return DAG.getNode(X86ISD::FXOR, dl, VT, Op.getOperand(0), Mask);
7134 SDValue X86TargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
7135 LLVMContext *Context = DAG.getContext();
7136 SDValue Op0 = Op.getOperand(0);
7137 SDValue Op1 = Op.getOperand(1);
7138 DebugLoc dl = Op.getDebugLoc();
7139 EVT VT = Op.getValueType();
7140 EVT SrcVT = Op1.getValueType();
7142 // If second operand is smaller, extend it first.
7143 if (SrcVT.bitsLT(VT)) {
7144 Op1 = DAG.getNode(ISD::FP_EXTEND, dl, VT, Op1);
7147 // And if it is bigger, shrink it first.
7148 if (SrcVT.bitsGT(VT)) {
7149 Op1 = DAG.getNode(ISD::FP_ROUND, dl, VT, Op1, DAG.getIntPtrConstant(1));
7153 // At this point the operands and the result should have the same
7154 // type, and that won't be f80 since that is not custom lowered.
7156 // First get the sign bit of second operand.
7157 std::vector<Constant*> CV;
7158 if (SrcVT == MVT::f64) {
7159 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, 1ULL << 63))));
7160 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, 0))));
7162 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 1U << 31))));
7163 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7164 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7165 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7167 Constant *C = ConstantVector::get(CV);
7168 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7169 SDValue Mask1 = DAG.getLoad(SrcVT, dl, DAG.getEntryNode(), CPIdx,
7170 MachinePointerInfo::getConstantPool(),
7172 SDValue SignBit = DAG.getNode(X86ISD::FAND, dl, SrcVT, Op1, Mask1);
7174 // Shift sign bit right or left if the two operands have different types.
7175 if (SrcVT.bitsGT(VT)) {
7176 // Op0 is MVT::f32, Op1 is MVT::f64.
7177 SignBit = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f64, SignBit);
7178 SignBit = DAG.getNode(X86ISD::FSRL, dl, MVT::v2f64, SignBit,
7179 DAG.getConstant(32, MVT::i32));
7180 SignBit = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, SignBit);
7181 SignBit = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, SignBit,
7182 DAG.getIntPtrConstant(0));
7185 // Clear first operand sign bit.
7187 if (VT == MVT::f64) {
7188 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, ~(1ULL << 63)))));
7189 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, 0))));
7191 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, ~(1U << 31)))));
7192 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7193 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7194 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7196 C = ConstantVector::get(CV);
7197 CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7198 SDValue Mask2 = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
7199 MachinePointerInfo::getConstantPool(),
7201 SDValue Val = DAG.getNode(X86ISD::FAND, dl, VT, Op0, Mask2);
7203 // Or the value with the sign bit.
7204 return DAG.getNode(X86ISD::FOR, dl, VT, Val, SignBit);
7207 /// Emit nodes that will be selected as "test Op0,Op0", or something
7209 SDValue X86TargetLowering::EmitTest(SDValue Op, unsigned X86CC,
7210 SelectionDAG &DAG) const {
7211 DebugLoc dl = Op.getDebugLoc();
7213 // CF and OF aren't always set the way we want. Determine which
7214 // of these we need.
7215 bool NeedCF = false;
7216 bool NeedOF = false;
7219 case X86::COND_A: case X86::COND_AE:
7220 case X86::COND_B: case X86::COND_BE:
7223 case X86::COND_G: case X86::COND_GE:
7224 case X86::COND_L: case X86::COND_LE:
7225 case X86::COND_O: case X86::COND_NO:
7230 // See if we can use the EFLAGS value from the operand instead of
7231 // doing a separate TEST. TEST always sets OF and CF to 0, so unless
7232 // we prove that the arithmetic won't overflow, we can't use OF or CF.
7233 if (Op.getResNo() != 0 || NeedOF || NeedCF)
7234 // Emit a CMP with 0, which is the TEST pattern.
7235 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
7236 DAG.getConstant(0, Op.getValueType()));
7238 unsigned Opcode = 0;
7239 unsigned NumOperands = 0;
7240 switch (Op.getNode()->getOpcode()) {
7242 // Due to an isel shortcoming, be conservative if this add is likely to be
7243 // selected as part of a load-modify-store instruction. When the root node
7244 // in a match is a store, isel doesn't know how to remap non-chain non-flag
7245 // uses of other nodes in the match, such as the ADD in this case. This
7246 // leads to the ADD being left around and reselected, with the result being
7247 // two adds in the output. Alas, even if none our users are stores, that
7248 // doesn't prove we're O.K. Ergo, if we have any parents that aren't
7249 // CopyToReg or SETCC, eschew INC/DEC. A better fix seems to require
7250 // climbing the DAG back to the root, and it doesn't seem to be worth the
7252 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
7253 UE = Op.getNode()->use_end(); UI != UE; ++UI)
7254 if (UI->getOpcode() != ISD::CopyToReg && UI->getOpcode() != ISD::SETCC)
7257 if (ConstantSDNode *C =
7258 dyn_cast<ConstantSDNode>(Op.getNode()->getOperand(1))) {
7259 // An add of one will be selected as an INC.
7260 if (C->getAPIntValue() == 1) {
7261 Opcode = X86ISD::INC;
7266 // An add of negative one (subtract of one) will be selected as a DEC.
7267 if (C->getAPIntValue().isAllOnesValue()) {
7268 Opcode = X86ISD::DEC;
7274 // Otherwise use a regular EFLAGS-setting add.
7275 Opcode = X86ISD::ADD;
7279 // If the primary and result isn't used, don't bother using X86ISD::AND,
7280 // because a TEST instruction will be better.
7281 bool NonFlagUse = false;
7282 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
7283 UE = Op.getNode()->use_end(); UI != UE; ++UI) {
7285 unsigned UOpNo = UI.getOperandNo();
7286 if (User->getOpcode() == ISD::TRUNCATE && User->hasOneUse()) {
7287 // Look pass truncate.
7288 UOpNo = User->use_begin().getOperandNo();
7289 User = *User->use_begin();
7292 if (User->getOpcode() != ISD::BRCOND &&
7293 User->getOpcode() != ISD::SETCC &&
7294 (User->getOpcode() != ISD::SELECT || UOpNo != 0)) {
7307 // Due to the ISEL shortcoming noted above, be conservative if this op is
7308 // likely to be selected as part of a load-modify-store instruction.
7309 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
7310 UE = Op.getNode()->use_end(); UI != UE; ++UI)
7311 if (UI->getOpcode() == ISD::STORE)
7314 // Otherwise use a regular EFLAGS-setting instruction.
7315 switch (Op.getNode()->getOpcode()) {
7316 default: llvm_unreachable("unexpected operator!");
7317 case ISD::SUB: Opcode = X86ISD::SUB; break;
7318 case ISD::OR: Opcode = X86ISD::OR; break;
7319 case ISD::XOR: Opcode = X86ISD::XOR; break;
7320 case ISD::AND: Opcode = X86ISD::AND; break;
7332 return SDValue(Op.getNode(), 1);
7339 // Emit a CMP with 0, which is the TEST pattern.
7340 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
7341 DAG.getConstant(0, Op.getValueType()));
7343 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32);
7344 SmallVector<SDValue, 4> Ops;
7345 for (unsigned i = 0; i != NumOperands; ++i)
7346 Ops.push_back(Op.getOperand(i));
7348 SDValue New = DAG.getNode(Opcode, dl, VTs, &Ops[0], NumOperands);
7349 DAG.ReplaceAllUsesWith(Op, New);
7350 return SDValue(New.getNode(), 1);
7353 /// Emit nodes that will be selected as "cmp Op0,Op1", or something
7355 SDValue X86TargetLowering::EmitCmp(SDValue Op0, SDValue Op1, unsigned X86CC,
7356 SelectionDAG &DAG) const {
7357 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op1))
7358 if (C->getAPIntValue() == 0)
7359 return EmitTest(Op0, X86CC, DAG);
7361 DebugLoc dl = Op0.getDebugLoc();
7362 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op0, Op1);
7365 /// LowerToBT - Result of 'and' is compared against zero. Turn it into a BT node
7366 /// if it's possible.
7367 SDValue X86TargetLowering::LowerToBT(SDValue And, ISD::CondCode CC,
7368 DebugLoc dl, SelectionDAG &DAG) const {
7369 SDValue Op0 = And.getOperand(0);
7370 SDValue Op1 = And.getOperand(1);
7371 if (Op0.getOpcode() == ISD::TRUNCATE)
7372 Op0 = Op0.getOperand(0);
7373 if (Op1.getOpcode() == ISD::TRUNCATE)
7374 Op1 = Op1.getOperand(0);
7377 if (Op1.getOpcode() == ISD::SHL)
7378 std::swap(Op0, Op1);
7379 if (Op0.getOpcode() == ISD::SHL) {
7380 if (ConstantSDNode *And00C = dyn_cast<ConstantSDNode>(Op0.getOperand(0)))
7381 if (And00C->getZExtValue() == 1) {
7382 // If we looked past a truncate, check that it's only truncating away
7384 unsigned BitWidth = Op0.getValueSizeInBits();
7385 unsigned AndBitWidth = And.getValueSizeInBits();
7386 if (BitWidth > AndBitWidth) {
7387 APInt Mask = APInt::getAllOnesValue(BitWidth), Zeros, Ones;
7388 DAG.ComputeMaskedBits(Op0, Mask, Zeros, Ones);
7389 if (Zeros.countLeadingOnes() < BitWidth - AndBitWidth)
7393 RHS = Op0.getOperand(1);
7395 } else if (Op1.getOpcode() == ISD::Constant) {
7396 ConstantSDNode *AndRHS = cast<ConstantSDNode>(Op1);
7397 SDValue AndLHS = Op0;
7398 if (AndRHS->getZExtValue() == 1 && AndLHS.getOpcode() == ISD::SRL) {
7399 LHS = AndLHS.getOperand(0);
7400 RHS = AndLHS.getOperand(1);
7404 if (LHS.getNode()) {
7405 // If LHS is i8, promote it to i32 with any_extend. There is no i8 BT
7406 // instruction. Since the shift amount is in-range-or-undefined, we know
7407 // that doing a bittest on the i32 value is ok. We extend to i32 because
7408 // the encoding for the i16 version is larger than the i32 version.
7409 // Also promote i16 to i32 for performance / code size reason.
7410 if (LHS.getValueType() == MVT::i8 ||
7411 LHS.getValueType() == MVT::i16)
7412 LHS = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, LHS);
7414 // If the operand types disagree, extend the shift amount to match. Since
7415 // BT ignores high bits (like shifts) we can use anyextend.
7416 if (LHS.getValueType() != RHS.getValueType())
7417 RHS = DAG.getNode(ISD::ANY_EXTEND, dl, LHS.getValueType(), RHS);
7419 SDValue BT = DAG.getNode(X86ISD::BT, dl, MVT::i32, LHS, RHS);
7420 unsigned Cond = CC == ISD::SETEQ ? X86::COND_AE : X86::COND_B;
7421 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
7422 DAG.getConstant(Cond, MVT::i8), BT);
7428 SDValue X86TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
7429 assert(Op.getValueType() == MVT::i8 && "SetCC type must be 8-bit integer");
7430 SDValue Op0 = Op.getOperand(0);
7431 SDValue Op1 = Op.getOperand(1);
7432 DebugLoc dl = Op.getDebugLoc();
7433 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
7435 // Optimize to BT if possible.
7436 // Lower (X & (1 << N)) == 0 to BT(X, N).
7437 // Lower ((X >>u N) & 1) != 0 to BT(X, N).
7438 // Lower ((X >>s N) & 1) != 0 to BT(X, N).
7439 if (Op0.getOpcode() == ISD::AND && Op0.hasOneUse() &&
7440 Op1.getOpcode() == ISD::Constant &&
7441 cast<ConstantSDNode>(Op1)->isNullValue() &&
7442 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
7443 SDValue NewSetCC = LowerToBT(Op0, CC, dl, DAG);
7444 if (NewSetCC.getNode())
7448 // Look for X == 0, X == 1, X != 0, or X != 1. We can simplify some forms of
7450 if (Op1.getOpcode() == ISD::Constant &&
7451 (cast<ConstantSDNode>(Op1)->getZExtValue() == 1 ||
7452 cast<ConstantSDNode>(Op1)->isNullValue()) &&
7453 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
7455 // If the input is a setcc, then reuse the input setcc or use a new one with
7456 // the inverted condition.
7457 if (Op0.getOpcode() == X86ISD::SETCC) {
7458 X86::CondCode CCode = (X86::CondCode)Op0.getConstantOperandVal(0);
7459 bool Invert = (CC == ISD::SETNE) ^
7460 cast<ConstantSDNode>(Op1)->isNullValue();
7461 if (!Invert) return Op0;
7463 CCode = X86::GetOppositeBranchCondition(CCode);
7464 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
7465 DAG.getConstant(CCode, MVT::i8), Op0.getOperand(1));
7469 bool isFP = Op1.getValueType().isFloatingPoint();
7470 unsigned X86CC = TranslateX86CC(CC, isFP, Op0, Op1, DAG);
7471 if (X86CC == X86::COND_INVALID)
7474 SDValue EFLAGS = EmitCmp(Op0, Op1, X86CC, DAG);
7475 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
7476 DAG.getConstant(X86CC, MVT::i8), EFLAGS);
7479 SDValue X86TargetLowering::LowerVSETCC(SDValue Op, SelectionDAG &DAG) const {
7481 SDValue Op0 = Op.getOperand(0);
7482 SDValue Op1 = Op.getOperand(1);
7483 SDValue CC = Op.getOperand(2);
7484 EVT VT = Op.getValueType();
7485 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
7486 bool isFP = Op.getOperand(1).getValueType().isFloatingPoint();
7487 DebugLoc dl = Op.getDebugLoc();
7491 EVT VT0 = Op0.getValueType();
7492 assert(VT0 == MVT::v4f32 || VT0 == MVT::v2f64);
7493 unsigned Opc = VT0 == MVT::v4f32 ? X86ISD::CMPPS : X86ISD::CMPPD;
7496 switch (SetCCOpcode) {
7499 case ISD::SETEQ: SSECC = 0; break;
7501 case ISD::SETGT: Swap = true; // Fallthrough
7503 case ISD::SETOLT: SSECC = 1; break;
7505 case ISD::SETGE: Swap = true; // Fallthrough
7507 case ISD::SETOLE: SSECC = 2; break;
7508 case ISD::SETUO: SSECC = 3; break;
7510 case ISD::SETNE: SSECC = 4; break;
7511 case ISD::SETULE: Swap = true;
7512 case ISD::SETUGE: SSECC = 5; break;
7513 case ISD::SETULT: Swap = true;
7514 case ISD::SETUGT: SSECC = 6; break;
7515 case ISD::SETO: SSECC = 7; break;
7518 std::swap(Op0, Op1);
7520 // In the two special cases we can't handle, emit two comparisons.
7522 if (SetCCOpcode == ISD::SETUEQ) {
7524 UNORD = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(3, MVT::i8));
7525 EQ = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(0, MVT::i8));
7526 return DAG.getNode(ISD::OR, dl, VT, UNORD, EQ);
7528 else if (SetCCOpcode == ISD::SETONE) {
7530 ORD = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(7, MVT::i8));
7531 NEQ = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(4, MVT::i8));
7532 return DAG.getNode(ISD::AND, dl, VT, ORD, NEQ);
7534 llvm_unreachable("Illegal FP comparison");
7536 // Handle all other FP comparisons here.
7537 return DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(SSECC, MVT::i8));
7540 // We are handling one of the integer comparisons here. Since SSE only has
7541 // GT and EQ comparisons for integer, swapping operands and multiple
7542 // operations may be required for some comparisons.
7543 unsigned Opc = 0, EQOpc = 0, GTOpc = 0;
7544 bool Swap = false, Invert = false, FlipSigns = false;
7546 switch (VT.getSimpleVT().SimpleTy) {
7548 case MVT::v16i8: EQOpc = X86ISD::PCMPEQB; GTOpc = X86ISD::PCMPGTB; break;
7549 case MVT::v8i16: EQOpc = X86ISD::PCMPEQW; GTOpc = X86ISD::PCMPGTW; break;
7550 case MVT::v4i32: EQOpc = X86ISD::PCMPEQD; GTOpc = X86ISD::PCMPGTD; break;
7551 case MVT::v2i64: EQOpc = X86ISD::PCMPEQQ; GTOpc = X86ISD::PCMPGTQ; break;
7554 switch (SetCCOpcode) {
7556 case ISD::SETNE: Invert = true;
7557 case ISD::SETEQ: Opc = EQOpc; break;
7558 case ISD::SETLT: Swap = true;
7559 case ISD::SETGT: Opc = GTOpc; break;
7560 case ISD::SETGE: Swap = true;
7561 case ISD::SETLE: Opc = GTOpc; Invert = true; break;
7562 case ISD::SETULT: Swap = true;
7563 case ISD::SETUGT: Opc = GTOpc; FlipSigns = true; break;
7564 case ISD::SETUGE: Swap = true;
7565 case ISD::SETULE: Opc = GTOpc; FlipSigns = true; Invert = true; break;
7568 std::swap(Op0, Op1);
7570 // Since SSE has no unsigned integer comparisons, we need to flip the sign
7571 // bits of the inputs before performing those operations.
7573 EVT EltVT = VT.getVectorElementType();
7574 SDValue SignBit = DAG.getConstant(APInt::getSignBit(EltVT.getSizeInBits()),
7576 std::vector<SDValue> SignBits(VT.getVectorNumElements(), SignBit);
7577 SDValue SignVec = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &SignBits[0],
7579 Op0 = DAG.getNode(ISD::XOR, dl, VT, Op0, SignVec);
7580 Op1 = DAG.getNode(ISD::XOR, dl, VT, Op1, SignVec);
7583 SDValue Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
7585 // If the logical-not of the result is required, perform that now.
7587 Result = DAG.getNOT(dl, Result, VT);
7592 // isX86LogicalCmp - Return true if opcode is a X86 logical comparison.
7593 static bool isX86LogicalCmp(SDValue Op) {
7594 unsigned Opc = Op.getNode()->getOpcode();
7595 if (Opc == X86ISD::CMP || Opc == X86ISD::COMI || Opc == X86ISD::UCOMI)
7597 if (Op.getResNo() == 1 &&
7598 (Opc == X86ISD::ADD ||
7599 Opc == X86ISD::SUB ||
7600 Opc == X86ISD::ADC ||
7601 Opc == X86ISD::SBB ||
7602 Opc == X86ISD::SMUL ||
7603 Opc == X86ISD::UMUL ||
7604 Opc == X86ISD::INC ||
7605 Opc == X86ISD::DEC ||
7606 Opc == X86ISD::OR ||
7607 Opc == X86ISD::XOR ||
7608 Opc == X86ISD::AND))
7611 if (Op.getResNo() == 2 && Opc == X86ISD::UMUL)
7617 static bool isZero(SDValue V) {
7618 ConstantSDNode *C = dyn_cast<ConstantSDNode>(V);
7619 return C && C->isNullValue();
7622 static bool isAllOnes(SDValue V) {
7623 ConstantSDNode *C = dyn_cast<ConstantSDNode>(V);
7624 return C && C->isAllOnesValue();
7627 SDValue X86TargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
7628 bool addTest = true;
7629 SDValue Cond = Op.getOperand(0);
7630 SDValue Op1 = Op.getOperand(1);
7631 SDValue Op2 = Op.getOperand(2);
7632 DebugLoc DL = Op.getDebugLoc();
7635 if (Cond.getOpcode() == ISD::SETCC) {
7636 SDValue NewCond = LowerSETCC(Cond, DAG);
7637 if (NewCond.getNode())
7641 // (select (x == 0), -1, y) -> (sign_bit (x - 1)) | y
7642 // (select (x == 0), y, -1) -> ~(sign_bit (x - 1)) | y
7643 // (select (x != 0), y, -1) -> (sign_bit (x - 1)) | y
7644 // (select (x != 0), -1, y) -> ~(sign_bit (x - 1)) | y
7645 if (Cond.getOpcode() == X86ISD::SETCC &&
7646 Cond.getOperand(1).getOpcode() == X86ISD::CMP &&
7647 isZero(Cond.getOperand(1).getOperand(1))) {
7648 SDValue Cmp = Cond.getOperand(1);
7650 unsigned CondCode =cast<ConstantSDNode>(Cond.getOperand(0))->getZExtValue();
7652 if ((isAllOnes(Op1) || isAllOnes(Op2)) &&
7653 (CondCode == X86::COND_E || CondCode == X86::COND_NE)) {
7654 SDValue Y = isAllOnes(Op2) ? Op1 : Op2;
7656 SDValue CmpOp0 = Cmp.getOperand(0);
7657 Cmp = DAG.getNode(X86ISD::CMP, DL, MVT::i32,
7658 CmpOp0, DAG.getConstant(1, CmpOp0.getValueType()));
7660 SDValue Res = // Res = 0 or -1.
7661 DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
7662 DAG.getConstant(X86::COND_B, MVT::i8), Cmp);
7664 if (isAllOnes(Op1) != (CondCode == X86::COND_E))
7665 Res = DAG.getNOT(DL, Res, Res.getValueType());
7667 ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(Op2);
7668 if (N2C == 0 || !N2C->isNullValue())
7669 Res = DAG.getNode(ISD::OR, DL, Res.getValueType(), Res, Y);
7674 // Look past (and (setcc_carry (cmp ...)), 1).
7675 if (Cond.getOpcode() == ISD::AND &&
7676 Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) {
7677 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Cond.getOperand(1));
7678 if (C && C->getAPIntValue() == 1)
7679 Cond = Cond.getOperand(0);
7682 // If condition flag is set by a X86ISD::CMP, then use it as the condition
7683 // setting operand in place of the X86ISD::SETCC.
7684 if (Cond.getOpcode() == X86ISD::SETCC ||
7685 Cond.getOpcode() == X86ISD::SETCC_CARRY) {
7686 CC = Cond.getOperand(0);
7688 SDValue Cmp = Cond.getOperand(1);
7689 unsigned Opc = Cmp.getOpcode();
7690 EVT VT = Op.getValueType();
7692 bool IllegalFPCMov = false;
7693 if (VT.isFloatingPoint() && !VT.isVector() &&
7694 !isScalarFPTypeInSSEReg(VT)) // FPStack?
7695 IllegalFPCMov = !hasFPCMov(cast<ConstantSDNode>(CC)->getSExtValue());
7697 if ((isX86LogicalCmp(Cmp) && !IllegalFPCMov) ||
7698 Opc == X86ISD::BT) { // FIXME
7705 // Look pass the truncate.
7706 if (Cond.getOpcode() == ISD::TRUNCATE)
7707 Cond = Cond.getOperand(0);
7709 // We know the result of AND is compared against zero. Try to match
7711 if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) {
7712 SDValue NewSetCC = LowerToBT(Cond, ISD::SETNE, DL, DAG);
7713 if (NewSetCC.getNode()) {
7714 CC = NewSetCC.getOperand(0);
7715 Cond = NewSetCC.getOperand(1);
7722 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
7723 Cond = EmitTest(Cond, X86::COND_NE, DAG);
7726 // a < b ? -1 : 0 -> RES = ~setcc_carry
7727 // a < b ? 0 : -1 -> RES = setcc_carry
7728 // a >= b ? -1 : 0 -> RES = setcc_carry
7729 // a >= b ? 0 : -1 -> RES = ~setcc_carry
7730 if (Cond.getOpcode() == X86ISD::CMP) {
7731 unsigned CondCode = cast<ConstantSDNode>(CC)->getZExtValue();
7733 if ((CondCode == X86::COND_AE || CondCode == X86::COND_B) &&
7734 (isAllOnes(Op1) || isAllOnes(Op2)) && (isZero(Op1) || isZero(Op2))) {
7735 SDValue Res = DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
7736 DAG.getConstant(X86::COND_B, MVT::i8), Cond);
7737 if (isAllOnes(Op1) != (CondCode == X86::COND_B))
7738 return DAG.getNOT(DL, Res, Res.getValueType());
7743 // X86ISD::CMOV means set the result (which is operand 1) to the RHS if
7744 // condition is true.
7745 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::Glue);
7746 SDValue Ops[] = { Op2, Op1, CC, Cond };
7747 return DAG.getNode(X86ISD::CMOV, DL, VTs, Ops, array_lengthof(Ops));
7750 // isAndOrOfSingleUseSetCCs - Return true if node is an ISD::AND or
7751 // ISD::OR of two X86ISD::SETCC nodes each of which has no other use apart
7752 // from the AND / OR.
7753 static bool isAndOrOfSetCCs(SDValue Op, unsigned &Opc) {
7754 Opc = Op.getOpcode();
7755 if (Opc != ISD::OR && Opc != ISD::AND)
7757 return (Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
7758 Op.getOperand(0).hasOneUse() &&
7759 Op.getOperand(1).getOpcode() == X86ISD::SETCC &&
7760 Op.getOperand(1).hasOneUse());
7763 // isXor1OfSetCC - Return true if node is an ISD::XOR of a X86ISD::SETCC and
7764 // 1 and that the SETCC node has a single use.
7765 static bool isXor1OfSetCC(SDValue Op) {
7766 if (Op.getOpcode() != ISD::XOR)
7768 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(Op.getOperand(1));
7769 if (N1C && N1C->getAPIntValue() == 1) {
7770 return Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
7771 Op.getOperand(0).hasOneUse();
7776 SDValue X86TargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) const {
7777 bool addTest = true;
7778 SDValue Chain = Op.getOperand(0);
7779 SDValue Cond = Op.getOperand(1);
7780 SDValue Dest = Op.getOperand(2);
7781 DebugLoc dl = Op.getDebugLoc();
7784 if (Cond.getOpcode() == ISD::SETCC) {
7785 SDValue NewCond = LowerSETCC(Cond, DAG);
7786 if (NewCond.getNode())
7790 // FIXME: LowerXALUO doesn't handle these!!
7791 else if (Cond.getOpcode() == X86ISD::ADD ||
7792 Cond.getOpcode() == X86ISD::SUB ||
7793 Cond.getOpcode() == X86ISD::SMUL ||
7794 Cond.getOpcode() == X86ISD::UMUL)
7795 Cond = LowerXALUO(Cond, DAG);
7798 // Look pass (and (setcc_carry (cmp ...)), 1).
7799 if (Cond.getOpcode() == ISD::AND &&
7800 Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) {
7801 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Cond.getOperand(1));
7802 if (C && C->getAPIntValue() == 1)
7803 Cond = Cond.getOperand(0);
7806 // If condition flag is set by a X86ISD::CMP, then use it as the condition
7807 // setting operand in place of the X86ISD::SETCC.
7808 if (Cond.getOpcode() == X86ISD::SETCC ||
7809 Cond.getOpcode() == X86ISD::SETCC_CARRY) {
7810 CC = Cond.getOperand(0);
7812 SDValue Cmp = Cond.getOperand(1);
7813 unsigned Opc = Cmp.getOpcode();
7814 // FIXME: WHY THE SPECIAL CASING OF LogicalCmp??
7815 if (isX86LogicalCmp(Cmp) || Opc == X86ISD::BT) {
7819 switch (cast<ConstantSDNode>(CC)->getZExtValue()) {
7823 // These can only come from an arithmetic instruction with overflow,
7824 // e.g. SADDO, UADDO.
7825 Cond = Cond.getNode()->getOperand(1);
7832 if (Cond.hasOneUse() && isAndOrOfSetCCs(Cond, CondOpc)) {
7833 SDValue Cmp = Cond.getOperand(0).getOperand(1);
7834 if (CondOpc == ISD::OR) {
7835 // Also, recognize the pattern generated by an FCMP_UNE. We can emit
7836 // two branches instead of an explicit OR instruction with a
7838 if (Cmp == Cond.getOperand(1).getOperand(1) &&
7839 isX86LogicalCmp(Cmp)) {
7840 CC = Cond.getOperand(0).getOperand(0);
7841 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
7842 Chain, Dest, CC, Cmp);
7843 CC = Cond.getOperand(1).getOperand(0);
7847 } else { // ISD::AND
7848 // Also, recognize the pattern generated by an FCMP_OEQ. We can emit
7849 // two branches instead of an explicit AND instruction with a
7850 // separate test. However, we only do this if this block doesn't
7851 // have a fall-through edge, because this requires an explicit
7852 // jmp when the condition is false.
7853 if (Cmp == Cond.getOperand(1).getOperand(1) &&
7854 isX86LogicalCmp(Cmp) &&
7855 Op.getNode()->hasOneUse()) {
7856 X86::CondCode CCode =
7857 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
7858 CCode = X86::GetOppositeBranchCondition(CCode);
7859 CC = DAG.getConstant(CCode, MVT::i8);
7860 SDNode *User = *Op.getNode()->use_begin();
7861 // Look for an unconditional branch following this conditional branch.
7862 // We need this because we need to reverse the successors in order
7863 // to implement FCMP_OEQ.
7864 if (User->getOpcode() == ISD::BR) {
7865 SDValue FalseBB = User->getOperand(1);
7867 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
7868 assert(NewBR == User);
7872 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
7873 Chain, Dest, CC, Cmp);
7874 X86::CondCode CCode =
7875 (X86::CondCode)Cond.getOperand(1).getConstantOperandVal(0);
7876 CCode = X86::GetOppositeBranchCondition(CCode);
7877 CC = DAG.getConstant(CCode, MVT::i8);
7883 } else if (Cond.hasOneUse() && isXor1OfSetCC(Cond)) {
7884 // Recognize for xorb (setcc), 1 patterns. The xor inverts the condition.
7885 // It should be transformed during dag combiner except when the condition
7886 // is set by a arithmetics with overflow node.
7887 X86::CondCode CCode =
7888 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
7889 CCode = X86::GetOppositeBranchCondition(CCode);
7890 CC = DAG.getConstant(CCode, MVT::i8);
7891 Cond = Cond.getOperand(0).getOperand(1);
7897 // Look pass the truncate.
7898 if (Cond.getOpcode() == ISD::TRUNCATE)
7899 Cond = Cond.getOperand(0);
7901 // We know the result of AND is compared against zero. Try to match
7903 if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) {
7904 SDValue NewSetCC = LowerToBT(Cond, ISD::SETNE, dl, DAG);
7905 if (NewSetCC.getNode()) {
7906 CC = NewSetCC.getOperand(0);
7907 Cond = NewSetCC.getOperand(1);
7914 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
7915 Cond = EmitTest(Cond, X86::COND_NE, DAG);
7917 return DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
7918 Chain, Dest, CC, Cond);
7922 // Lower dynamic stack allocation to _alloca call for Cygwin/Mingw targets.
7923 // Calls to _alloca is needed to probe the stack when allocating more than 4k
7924 // bytes in one go. Touching the stack at 4K increments is necessary to ensure
7925 // that the guard pages used by the OS virtual memory manager are allocated in
7926 // correct sequence.
7928 X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
7929 SelectionDAG &DAG) const {
7930 assert((Subtarget->isTargetCygMing() || Subtarget->isTargetWindows()) &&
7931 "This should be used only on Windows targets");
7932 assert(!Subtarget->isTargetEnvMacho());
7933 DebugLoc dl = Op.getDebugLoc();
7936 SDValue Chain = Op.getOperand(0);
7937 SDValue Size = Op.getOperand(1);
7938 // FIXME: Ensure alignment here
7942 EVT SPTy = Subtarget->is64Bit() ? MVT::i64 : MVT::i32;
7943 unsigned Reg = (Subtarget->is64Bit() ? X86::RAX : X86::EAX);
7945 Chain = DAG.getCopyToReg(Chain, dl, Reg, Size, Flag);
7946 Flag = Chain.getValue(1);
7948 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
7950 Chain = DAG.getNode(X86ISD::WIN_ALLOCA, dl, NodeTys, Chain, Flag);
7951 Flag = Chain.getValue(1);
7953 Chain = DAG.getCopyFromReg(Chain, dl, X86StackPtr, SPTy).getValue(1);
7955 SDValue Ops1[2] = { Chain.getValue(0), Chain };
7956 return DAG.getMergeValues(Ops1, 2, dl);
7959 SDValue X86TargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const {
7960 MachineFunction &MF = DAG.getMachineFunction();
7961 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
7963 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
7964 DebugLoc DL = Op.getDebugLoc();
7966 if (!Subtarget->is64Bit() || Subtarget->isTargetWin64()) {
7967 // vastart just stores the address of the VarArgsFrameIndex slot into the
7968 // memory location argument.
7969 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
7971 return DAG.getStore(Op.getOperand(0), DL, FR, Op.getOperand(1),
7972 MachinePointerInfo(SV), false, false, 0);
7976 // gp_offset (0 - 6 * 8)
7977 // fp_offset (48 - 48 + 8 * 16)
7978 // overflow_arg_area (point to parameters coming in memory).
7980 SmallVector<SDValue, 8> MemOps;
7981 SDValue FIN = Op.getOperand(1);
7983 SDValue Store = DAG.getStore(Op.getOperand(0), DL,
7984 DAG.getConstant(FuncInfo->getVarArgsGPOffset(),
7986 FIN, MachinePointerInfo(SV), false, false, 0);
7987 MemOps.push_back(Store);
7990 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7991 FIN, DAG.getIntPtrConstant(4));
7992 Store = DAG.getStore(Op.getOperand(0), DL,
7993 DAG.getConstant(FuncInfo->getVarArgsFPOffset(),
7995 FIN, MachinePointerInfo(SV, 4), false, false, 0);
7996 MemOps.push_back(Store);
7998 // Store ptr to overflow_arg_area
7999 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
8000 FIN, DAG.getIntPtrConstant(4));
8001 SDValue OVFIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
8003 Store = DAG.getStore(Op.getOperand(0), DL, OVFIN, FIN,
8004 MachinePointerInfo(SV, 8),
8006 MemOps.push_back(Store);
8008 // Store ptr to reg_save_area.
8009 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
8010 FIN, DAG.getIntPtrConstant(8));
8011 SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(),
8013 Store = DAG.getStore(Op.getOperand(0), DL, RSFIN, FIN,
8014 MachinePointerInfo(SV, 16), false, false, 0);
8015 MemOps.push_back(Store);
8016 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
8017 &MemOps[0], MemOps.size());
8020 SDValue X86TargetLowering::LowerVAARG(SDValue Op, SelectionDAG &DAG) const {
8021 assert(Subtarget->is64Bit() &&
8022 "LowerVAARG only handles 64-bit va_arg!");
8023 assert((Subtarget->isTargetLinux() ||
8024 Subtarget->isTargetDarwin()) &&
8025 "Unhandled target in LowerVAARG");
8026 assert(Op.getNode()->getNumOperands() == 4);
8027 SDValue Chain = Op.getOperand(0);
8028 SDValue SrcPtr = Op.getOperand(1);
8029 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
8030 unsigned Align = Op.getConstantOperandVal(3);
8031 DebugLoc dl = Op.getDebugLoc();
8033 EVT ArgVT = Op.getNode()->getValueType(0);
8034 const Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
8035 uint32_t ArgSize = getTargetData()->getTypeAllocSize(ArgTy);
8038 // Decide which area this value should be read from.
8039 // TODO: Implement the AMD64 ABI in its entirety. This simple
8040 // selection mechanism works only for the basic types.
8041 if (ArgVT == MVT::f80) {
8042 llvm_unreachable("va_arg for f80 not yet implemented");
8043 } else if (ArgVT.isFloatingPoint() && ArgSize <= 16 /*bytes*/) {
8044 ArgMode = 2; // Argument passed in XMM register. Use fp_offset.
8045 } else if (ArgVT.isInteger() && ArgSize <= 32 /*bytes*/) {
8046 ArgMode = 1; // Argument passed in GPR64 register(s). Use gp_offset.
8048 llvm_unreachable("Unhandled argument type in LowerVAARG");
8052 // Sanity Check: Make sure using fp_offset makes sense.
8053 assert(!UseSoftFloat &&
8054 !(DAG.getMachineFunction()
8055 .getFunction()->hasFnAttr(Attribute::NoImplicitFloat)) &&
8056 Subtarget->hasXMM());
8059 // Insert VAARG_64 node into the DAG
8060 // VAARG_64 returns two values: Variable Argument Address, Chain
8061 SmallVector<SDValue, 11> InstOps;
8062 InstOps.push_back(Chain);
8063 InstOps.push_back(SrcPtr);
8064 InstOps.push_back(DAG.getConstant(ArgSize, MVT::i32));
8065 InstOps.push_back(DAG.getConstant(ArgMode, MVT::i8));
8066 InstOps.push_back(DAG.getConstant(Align, MVT::i32));
8067 SDVTList VTs = DAG.getVTList(getPointerTy(), MVT::Other);
8068 SDValue VAARG = DAG.getMemIntrinsicNode(X86ISD::VAARG_64, dl,
8069 VTs, &InstOps[0], InstOps.size(),
8071 MachinePointerInfo(SV),
8076 Chain = VAARG.getValue(1);
8078 // Load the next argument and return it
8079 return DAG.getLoad(ArgVT, dl,
8082 MachinePointerInfo(),
8086 SDValue X86TargetLowering::LowerVACOPY(SDValue Op, SelectionDAG &DAG) const {
8087 // X86-64 va_list is a struct { i32, i32, i8*, i8* }.
8088 assert(Subtarget->is64Bit() && "This code only handles 64-bit va_copy!");
8089 SDValue Chain = Op.getOperand(0);
8090 SDValue DstPtr = Op.getOperand(1);
8091 SDValue SrcPtr = Op.getOperand(2);
8092 const Value *DstSV = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
8093 const Value *SrcSV = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
8094 DebugLoc DL = Op.getDebugLoc();
8096 return DAG.getMemcpy(Chain, DL, DstPtr, SrcPtr,
8097 DAG.getIntPtrConstant(24), 8, /*isVolatile*/false,
8099 MachinePointerInfo(DstSV), MachinePointerInfo(SrcSV));
8103 X86TargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const {
8104 DebugLoc dl = Op.getDebugLoc();
8105 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
8107 default: return SDValue(); // Don't custom lower most intrinsics.
8108 // Comparison intrinsics.
8109 case Intrinsic::x86_sse_comieq_ss:
8110 case Intrinsic::x86_sse_comilt_ss:
8111 case Intrinsic::x86_sse_comile_ss:
8112 case Intrinsic::x86_sse_comigt_ss:
8113 case Intrinsic::x86_sse_comige_ss:
8114 case Intrinsic::x86_sse_comineq_ss:
8115 case Intrinsic::x86_sse_ucomieq_ss:
8116 case Intrinsic::x86_sse_ucomilt_ss:
8117 case Intrinsic::x86_sse_ucomile_ss:
8118 case Intrinsic::x86_sse_ucomigt_ss:
8119 case Intrinsic::x86_sse_ucomige_ss:
8120 case Intrinsic::x86_sse_ucomineq_ss:
8121 case Intrinsic::x86_sse2_comieq_sd:
8122 case Intrinsic::x86_sse2_comilt_sd:
8123 case Intrinsic::x86_sse2_comile_sd:
8124 case Intrinsic::x86_sse2_comigt_sd:
8125 case Intrinsic::x86_sse2_comige_sd:
8126 case Intrinsic::x86_sse2_comineq_sd:
8127 case Intrinsic::x86_sse2_ucomieq_sd:
8128 case Intrinsic::x86_sse2_ucomilt_sd:
8129 case Intrinsic::x86_sse2_ucomile_sd:
8130 case Intrinsic::x86_sse2_ucomigt_sd:
8131 case Intrinsic::x86_sse2_ucomige_sd:
8132 case Intrinsic::x86_sse2_ucomineq_sd: {
8134 ISD::CondCode CC = ISD::SETCC_INVALID;
8137 case Intrinsic::x86_sse_comieq_ss:
8138 case Intrinsic::x86_sse2_comieq_sd:
8142 case Intrinsic::x86_sse_comilt_ss:
8143 case Intrinsic::x86_sse2_comilt_sd:
8147 case Intrinsic::x86_sse_comile_ss:
8148 case Intrinsic::x86_sse2_comile_sd:
8152 case Intrinsic::x86_sse_comigt_ss:
8153 case Intrinsic::x86_sse2_comigt_sd:
8157 case Intrinsic::x86_sse_comige_ss:
8158 case Intrinsic::x86_sse2_comige_sd:
8162 case Intrinsic::x86_sse_comineq_ss:
8163 case Intrinsic::x86_sse2_comineq_sd:
8167 case Intrinsic::x86_sse_ucomieq_ss:
8168 case Intrinsic::x86_sse2_ucomieq_sd:
8169 Opc = X86ISD::UCOMI;
8172 case Intrinsic::x86_sse_ucomilt_ss:
8173 case Intrinsic::x86_sse2_ucomilt_sd:
8174 Opc = X86ISD::UCOMI;
8177 case Intrinsic::x86_sse_ucomile_ss:
8178 case Intrinsic::x86_sse2_ucomile_sd:
8179 Opc = X86ISD::UCOMI;
8182 case Intrinsic::x86_sse_ucomigt_ss:
8183 case Intrinsic::x86_sse2_ucomigt_sd:
8184 Opc = X86ISD::UCOMI;
8187 case Intrinsic::x86_sse_ucomige_ss:
8188 case Intrinsic::x86_sse2_ucomige_sd:
8189 Opc = X86ISD::UCOMI;
8192 case Intrinsic::x86_sse_ucomineq_ss:
8193 case Intrinsic::x86_sse2_ucomineq_sd:
8194 Opc = X86ISD::UCOMI;
8199 SDValue LHS = Op.getOperand(1);
8200 SDValue RHS = Op.getOperand(2);
8201 unsigned X86CC = TranslateX86CC(CC, true, LHS, RHS, DAG);
8202 assert(X86CC != X86::COND_INVALID && "Unexpected illegal condition!");
8203 SDValue Cond = DAG.getNode(Opc, dl, MVT::i32, LHS, RHS);
8204 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
8205 DAG.getConstant(X86CC, MVT::i8), Cond);
8206 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
8208 // ptest and testp intrinsics. The intrinsic these come from are designed to
8209 // return an integer value, not just an instruction so lower it to the ptest
8210 // or testp pattern and a setcc for the result.
8211 case Intrinsic::x86_sse41_ptestz:
8212 case Intrinsic::x86_sse41_ptestc:
8213 case Intrinsic::x86_sse41_ptestnzc:
8214 case Intrinsic::x86_avx_ptestz_256:
8215 case Intrinsic::x86_avx_ptestc_256:
8216 case Intrinsic::x86_avx_ptestnzc_256:
8217 case Intrinsic::x86_avx_vtestz_ps:
8218 case Intrinsic::x86_avx_vtestc_ps:
8219 case Intrinsic::x86_avx_vtestnzc_ps:
8220 case Intrinsic::x86_avx_vtestz_pd:
8221 case Intrinsic::x86_avx_vtestc_pd:
8222 case Intrinsic::x86_avx_vtestnzc_pd:
8223 case Intrinsic::x86_avx_vtestz_ps_256:
8224 case Intrinsic::x86_avx_vtestc_ps_256:
8225 case Intrinsic::x86_avx_vtestnzc_ps_256:
8226 case Intrinsic::x86_avx_vtestz_pd_256:
8227 case Intrinsic::x86_avx_vtestc_pd_256:
8228 case Intrinsic::x86_avx_vtestnzc_pd_256: {
8229 bool IsTestPacked = false;
8232 default: llvm_unreachable("Bad fallthrough in Intrinsic lowering.");
8233 case Intrinsic::x86_avx_vtestz_ps:
8234 case Intrinsic::x86_avx_vtestz_pd:
8235 case Intrinsic::x86_avx_vtestz_ps_256:
8236 case Intrinsic::x86_avx_vtestz_pd_256:
8237 IsTestPacked = true; // Fallthrough
8238 case Intrinsic::x86_sse41_ptestz:
8239 case Intrinsic::x86_avx_ptestz_256:
8241 X86CC = X86::COND_E;
8243 case Intrinsic::x86_avx_vtestc_ps:
8244 case Intrinsic::x86_avx_vtestc_pd:
8245 case Intrinsic::x86_avx_vtestc_ps_256:
8246 case Intrinsic::x86_avx_vtestc_pd_256:
8247 IsTestPacked = true; // Fallthrough
8248 case Intrinsic::x86_sse41_ptestc:
8249 case Intrinsic::x86_avx_ptestc_256:
8251 X86CC = X86::COND_B;
8253 case Intrinsic::x86_avx_vtestnzc_ps:
8254 case Intrinsic::x86_avx_vtestnzc_pd:
8255 case Intrinsic::x86_avx_vtestnzc_ps_256:
8256 case Intrinsic::x86_avx_vtestnzc_pd_256:
8257 IsTestPacked = true; // Fallthrough
8258 case Intrinsic::x86_sse41_ptestnzc:
8259 case Intrinsic::x86_avx_ptestnzc_256:
8261 X86CC = X86::COND_A;
8265 SDValue LHS = Op.getOperand(1);
8266 SDValue RHS = Op.getOperand(2);
8267 unsigned TestOpc = IsTestPacked ? X86ISD::TESTP : X86ISD::PTEST;
8268 SDValue Test = DAG.getNode(TestOpc, dl, MVT::i32, LHS, RHS);
8269 SDValue CC = DAG.getConstant(X86CC, MVT::i8);
8270 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8, CC, Test);
8271 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
8274 // Fix vector shift instructions where the last operand is a non-immediate
8276 case Intrinsic::x86_sse2_pslli_w:
8277 case Intrinsic::x86_sse2_pslli_d:
8278 case Intrinsic::x86_sse2_pslli_q:
8279 case Intrinsic::x86_sse2_psrli_w:
8280 case Intrinsic::x86_sse2_psrli_d:
8281 case Intrinsic::x86_sse2_psrli_q:
8282 case Intrinsic::x86_sse2_psrai_w:
8283 case Intrinsic::x86_sse2_psrai_d:
8284 case Intrinsic::x86_mmx_pslli_w:
8285 case Intrinsic::x86_mmx_pslli_d:
8286 case Intrinsic::x86_mmx_pslli_q:
8287 case Intrinsic::x86_mmx_psrli_w:
8288 case Intrinsic::x86_mmx_psrli_d:
8289 case Intrinsic::x86_mmx_psrli_q:
8290 case Intrinsic::x86_mmx_psrai_w:
8291 case Intrinsic::x86_mmx_psrai_d: {
8292 SDValue ShAmt = Op.getOperand(2);
8293 if (isa<ConstantSDNode>(ShAmt))
8296 unsigned NewIntNo = 0;
8297 EVT ShAmtVT = MVT::v4i32;
8299 case Intrinsic::x86_sse2_pslli_w:
8300 NewIntNo = Intrinsic::x86_sse2_psll_w;
8302 case Intrinsic::x86_sse2_pslli_d:
8303 NewIntNo = Intrinsic::x86_sse2_psll_d;
8305 case Intrinsic::x86_sse2_pslli_q:
8306 NewIntNo = Intrinsic::x86_sse2_psll_q;
8308 case Intrinsic::x86_sse2_psrli_w:
8309 NewIntNo = Intrinsic::x86_sse2_psrl_w;
8311 case Intrinsic::x86_sse2_psrli_d:
8312 NewIntNo = Intrinsic::x86_sse2_psrl_d;
8314 case Intrinsic::x86_sse2_psrli_q:
8315 NewIntNo = Intrinsic::x86_sse2_psrl_q;
8317 case Intrinsic::x86_sse2_psrai_w:
8318 NewIntNo = Intrinsic::x86_sse2_psra_w;
8320 case Intrinsic::x86_sse2_psrai_d:
8321 NewIntNo = Intrinsic::x86_sse2_psra_d;
8324 ShAmtVT = MVT::v2i32;
8326 case Intrinsic::x86_mmx_pslli_w:
8327 NewIntNo = Intrinsic::x86_mmx_psll_w;
8329 case Intrinsic::x86_mmx_pslli_d:
8330 NewIntNo = Intrinsic::x86_mmx_psll_d;
8332 case Intrinsic::x86_mmx_pslli_q:
8333 NewIntNo = Intrinsic::x86_mmx_psll_q;
8335 case Intrinsic::x86_mmx_psrli_w:
8336 NewIntNo = Intrinsic::x86_mmx_psrl_w;
8338 case Intrinsic::x86_mmx_psrli_d:
8339 NewIntNo = Intrinsic::x86_mmx_psrl_d;
8341 case Intrinsic::x86_mmx_psrli_q:
8342 NewIntNo = Intrinsic::x86_mmx_psrl_q;
8344 case Intrinsic::x86_mmx_psrai_w:
8345 NewIntNo = Intrinsic::x86_mmx_psra_w;
8347 case Intrinsic::x86_mmx_psrai_d:
8348 NewIntNo = Intrinsic::x86_mmx_psra_d;
8350 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
8356 // The vector shift intrinsics with scalars uses 32b shift amounts but
8357 // the sse2/mmx shift instructions reads 64 bits. Set the upper 32 bits
8361 ShOps[1] = DAG.getConstant(0, MVT::i32);
8362 if (ShAmtVT == MVT::v4i32) {
8363 ShOps[2] = DAG.getUNDEF(MVT::i32);
8364 ShOps[3] = DAG.getUNDEF(MVT::i32);
8365 ShAmt = DAG.getNode(ISD::BUILD_VECTOR, dl, ShAmtVT, &ShOps[0], 4);
8367 ShAmt = DAG.getNode(ISD::BUILD_VECTOR, dl, ShAmtVT, &ShOps[0], 2);
8368 // FIXME this must be lowered to get rid of the invalid type.
8371 EVT VT = Op.getValueType();
8372 ShAmt = DAG.getNode(ISD::BITCAST, dl, VT, ShAmt);
8373 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8374 DAG.getConstant(NewIntNo, MVT::i32),
8375 Op.getOperand(1), ShAmt);
8380 SDValue X86TargetLowering::LowerRETURNADDR(SDValue Op,
8381 SelectionDAG &DAG) const {
8382 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
8383 MFI->setReturnAddressIsTaken(true);
8385 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
8386 DebugLoc dl = Op.getDebugLoc();
8389 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
8391 DAG.getConstant(TD->getPointerSize(),
8392 Subtarget->is64Bit() ? MVT::i64 : MVT::i32);
8393 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
8394 DAG.getNode(ISD::ADD, dl, getPointerTy(),
8396 MachinePointerInfo(), false, false, 0);
8399 // Just load the return address.
8400 SDValue RetAddrFI = getReturnAddressFrameIndex(DAG);
8401 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
8402 RetAddrFI, MachinePointerInfo(), false, false, 0);
8405 SDValue X86TargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
8406 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
8407 MFI->setFrameAddressIsTaken(true);
8409 EVT VT = Op.getValueType();
8410 DebugLoc dl = Op.getDebugLoc(); // FIXME probably not meaningful
8411 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
8412 unsigned FrameReg = Subtarget->is64Bit() ? X86::RBP : X86::EBP;
8413 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
8415 FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr,
8416 MachinePointerInfo(),
8421 SDValue X86TargetLowering::LowerFRAME_TO_ARGS_OFFSET(SDValue Op,
8422 SelectionDAG &DAG) const {
8423 return DAG.getIntPtrConstant(2*TD->getPointerSize());
8426 SDValue X86TargetLowering::LowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const {
8427 MachineFunction &MF = DAG.getMachineFunction();
8428 SDValue Chain = Op.getOperand(0);
8429 SDValue Offset = Op.getOperand(1);
8430 SDValue Handler = Op.getOperand(2);
8431 DebugLoc dl = Op.getDebugLoc();
8433 SDValue Frame = DAG.getCopyFromReg(DAG.getEntryNode(), dl,
8434 Subtarget->is64Bit() ? X86::RBP : X86::EBP,
8436 unsigned StoreAddrReg = (Subtarget->is64Bit() ? X86::RCX : X86::ECX);
8438 SDValue StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), Frame,
8439 DAG.getIntPtrConstant(TD->getPointerSize()));
8440 StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), StoreAddr, Offset);
8441 Chain = DAG.getStore(Chain, dl, Handler, StoreAddr, MachinePointerInfo(),
8443 Chain = DAG.getCopyToReg(Chain, dl, StoreAddrReg, StoreAddr);
8444 MF.getRegInfo().addLiveOut(StoreAddrReg);
8446 return DAG.getNode(X86ISD::EH_RETURN, dl,
8448 Chain, DAG.getRegister(StoreAddrReg, getPointerTy()));
8451 SDValue X86TargetLowering::LowerTRAMPOLINE(SDValue Op,
8452 SelectionDAG &DAG) const {
8453 SDValue Root = Op.getOperand(0);
8454 SDValue Trmp = Op.getOperand(1); // trampoline
8455 SDValue FPtr = Op.getOperand(2); // nested function
8456 SDValue Nest = Op.getOperand(3); // 'nest' parameter value
8457 DebugLoc dl = Op.getDebugLoc();
8459 const Value *TrmpAddr = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
8461 if (Subtarget->is64Bit()) {
8462 SDValue OutChains[6];
8464 // Large code-model.
8465 const unsigned char JMP64r = 0xFF; // 64-bit jmp through register opcode.
8466 const unsigned char MOV64ri = 0xB8; // X86::MOV64ri opcode.
8468 const unsigned char N86R10 = RegInfo->getX86RegNum(X86::R10);
8469 const unsigned char N86R11 = RegInfo->getX86RegNum(X86::R11);
8471 const unsigned char REX_WB = 0x40 | 0x08 | 0x01; // REX prefix
8473 // Load the pointer to the nested function into R11.
8474 unsigned OpCode = ((MOV64ri | N86R11) << 8) | REX_WB; // movabsq r11
8475 SDValue Addr = Trmp;
8476 OutChains[0] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
8477 Addr, MachinePointerInfo(TrmpAddr),
8480 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
8481 DAG.getConstant(2, MVT::i64));
8482 OutChains[1] = DAG.getStore(Root, dl, FPtr, Addr,
8483 MachinePointerInfo(TrmpAddr, 2),
8486 // Load the 'nest' parameter value into R10.
8487 // R10 is specified in X86CallingConv.td
8488 OpCode = ((MOV64ri | N86R10) << 8) | REX_WB; // movabsq r10
8489 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
8490 DAG.getConstant(10, MVT::i64));
8491 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
8492 Addr, MachinePointerInfo(TrmpAddr, 10),
8495 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
8496 DAG.getConstant(12, MVT::i64));
8497 OutChains[3] = DAG.getStore(Root, dl, Nest, Addr,
8498 MachinePointerInfo(TrmpAddr, 12),
8501 // Jump to the nested function.
8502 OpCode = (JMP64r << 8) | REX_WB; // jmpq *...
8503 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
8504 DAG.getConstant(20, MVT::i64));
8505 OutChains[4] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
8506 Addr, MachinePointerInfo(TrmpAddr, 20),
8509 unsigned char ModRM = N86R11 | (4 << 3) | (3 << 6); // ...r11
8510 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
8511 DAG.getConstant(22, MVT::i64));
8512 OutChains[5] = DAG.getStore(Root, dl, DAG.getConstant(ModRM, MVT::i8), Addr,
8513 MachinePointerInfo(TrmpAddr, 22),
8517 { Trmp, DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 6) };
8518 return DAG.getMergeValues(Ops, 2, dl);
8520 const Function *Func =
8521 cast<Function>(cast<SrcValueSDNode>(Op.getOperand(5))->getValue());
8522 CallingConv::ID CC = Func->getCallingConv();
8527 llvm_unreachable("Unsupported calling convention");
8528 case CallingConv::C:
8529 case CallingConv::X86_StdCall: {
8530 // Pass 'nest' parameter in ECX.
8531 // Must be kept in sync with X86CallingConv.td
8534 // Check that ECX wasn't needed by an 'inreg' parameter.
8535 const FunctionType *FTy = Func->getFunctionType();
8536 const AttrListPtr &Attrs = Func->getAttributes();
8538 if (!Attrs.isEmpty() && !Func->isVarArg()) {
8539 unsigned InRegCount = 0;
8542 for (FunctionType::param_iterator I = FTy->param_begin(),
8543 E = FTy->param_end(); I != E; ++I, ++Idx)
8544 if (Attrs.paramHasAttr(Idx, Attribute::InReg))
8545 // FIXME: should only count parameters that are lowered to integers.
8546 InRegCount += (TD->getTypeSizeInBits(*I) + 31) / 32;
8548 if (InRegCount > 2) {
8549 report_fatal_error("Nest register in use - reduce number of inreg"
8555 case CallingConv::X86_FastCall:
8556 case CallingConv::X86_ThisCall:
8557 case CallingConv::Fast:
8558 // Pass 'nest' parameter in EAX.
8559 // Must be kept in sync with X86CallingConv.td
8564 SDValue OutChains[4];
8567 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
8568 DAG.getConstant(10, MVT::i32));
8569 Disp = DAG.getNode(ISD::SUB, dl, MVT::i32, FPtr, Addr);
8571 // This is storing the opcode for MOV32ri.
8572 const unsigned char MOV32ri = 0xB8; // X86::MOV32ri's opcode byte.
8573 const unsigned char N86Reg = RegInfo->getX86RegNum(NestReg);
8574 OutChains[0] = DAG.getStore(Root, dl,
8575 DAG.getConstant(MOV32ri|N86Reg, MVT::i8),
8576 Trmp, MachinePointerInfo(TrmpAddr),
8579 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
8580 DAG.getConstant(1, MVT::i32));
8581 OutChains[1] = DAG.getStore(Root, dl, Nest, Addr,
8582 MachinePointerInfo(TrmpAddr, 1),
8585 const unsigned char JMP = 0xE9; // jmp <32bit dst> opcode.
8586 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
8587 DAG.getConstant(5, MVT::i32));
8588 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(JMP, MVT::i8), Addr,
8589 MachinePointerInfo(TrmpAddr, 5),
8592 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
8593 DAG.getConstant(6, MVT::i32));
8594 OutChains[3] = DAG.getStore(Root, dl, Disp, Addr,
8595 MachinePointerInfo(TrmpAddr, 6),
8599 { Trmp, DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 4) };
8600 return DAG.getMergeValues(Ops, 2, dl);
8604 SDValue X86TargetLowering::LowerFLT_ROUNDS_(SDValue Op,
8605 SelectionDAG &DAG) const {
8607 The rounding mode is in bits 11:10 of FPSR, and has the following
8614 FLT_ROUNDS, on the other hand, expects the following:
8621 To perform the conversion, we do:
8622 (((((FPSR & 0x800) >> 11) | ((FPSR & 0x400) >> 9)) + 1) & 3)
8625 MachineFunction &MF = DAG.getMachineFunction();
8626 const TargetMachine &TM = MF.getTarget();
8627 const TargetFrameLowering &TFI = *TM.getFrameLowering();
8628 unsigned StackAlignment = TFI.getStackAlignment();
8629 EVT VT = Op.getValueType();
8630 DebugLoc DL = Op.getDebugLoc();
8632 // Save FP Control Word to stack slot
8633 int SSFI = MF.getFrameInfo()->CreateStackObject(2, StackAlignment, false);
8634 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
8637 MachineMemOperand *MMO =
8638 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
8639 MachineMemOperand::MOStore, 2, 2);
8641 SDValue Ops[] = { DAG.getEntryNode(), StackSlot };
8642 SDValue Chain = DAG.getMemIntrinsicNode(X86ISD::FNSTCW16m, DL,
8643 DAG.getVTList(MVT::Other),
8644 Ops, 2, MVT::i16, MMO);
8646 // Load FP Control Word from stack slot
8647 SDValue CWD = DAG.getLoad(MVT::i16, DL, Chain, StackSlot,
8648 MachinePointerInfo(), false, false, 0);
8650 // Transform as necessary
8652 DAG.getNode(ISD::SRL, DL, MVT::i16,
8653 DAG.getNode(ISD::AND, DL, MVT::i16,
8654 CWD, DAG.getConstant(0x800, MVT::i16)),
8655 DAG.getConstant(11, MVT::i8));
8657 DAG.getNode(ISD::SRL, DL, MVT::i16,
8658 DAG.getNode(ISD::AND, DL, MVT::i16,
8659 CWD, DAG.getConstant(0x400, MVT::i16)),
8660 DAG.getConstant(9, MVT::i8));
8663 DAG.getNode(ISD::AND, DL, MVT::i16,
8664 DAG.getNode(ISD::ADD, DL, MVT::i16,
8665 DAG.getNode(ISD::OR, DL, MVT::i16, CWD1, CWD2),
8666 DAG.getConstant(1, MVT::i16)),
8667 DAG.getConstant(3, MVT::i16));
8670 return DAG.getNode((VT.getSizeInBits() < 16 ?
8671 ISD::TRUNCATE : ISD::ZERO_EXTEND), DL, VT, RetVal);
8674 SDValue X86TargetLowering::LowerCTLZ(SDValue Op, SelectionDAG &DAG) const {
8675 EVT VT = Op.getValueType();
8677 unsigned NumBits = VT.getSizeInBits();
8678 DebugLoc dl = Op.getDebugLoc();
8680 Op = Op.getOperand(0);
8681 if (VT == MVT::i8) {
8682 // Zero extend to i32 since there is not an i8 bsr.
8684 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
8687 // Issue a bsr (scan bits in reverse) which also sets EFLAGS.
8688 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
8689 Op = DAG.getNode(X86ISD::BSR, dl, VTs, Op);
8691 // If src is zero (i.e. bsr sets ZF), returns NumBits.
8694 DAG.getConstant(NumBits+NumBits-1, OpVT),
8695 DAG.getConstant(X86::COND_E, MVT::i8),
8698 Op = DAG.getNode(X86ISD::CMOV, dl, OpVT, Ops, array_lengthof(Ops));
8700 // Finally xor with NumBits-1.
8701 Op = DAG.getNode(ISD::XOR, dl, OpVT, Op, DAG.getConstant(NumBits-1, OpVT));
8704 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
8708 SDValue X86TargetLowering::LowerCTTZ(SDValue Op, SelectionDAG &DAG) const {
8709 EVT VT = Op.getValueType();
8711 unsigned NumBits = VT.getSizeInBits();
8712 DebugLoc dl = Op.getDebugLoc();
8714 Op = Op.getOperand(0);
8715 if (VT == MVT::i8) {
8717 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
8720 // Issue a bsf (scan bits forward) which also sets EFLAGS.
8721 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
8722 Op = DAG.getNode(X86ISD::BSF, dl, VTs, Op);
8724 // If src is zero (i.e. bsf sets ZF), returns NumBits.
8727 DAG.getConstant(NumBits, OpVT),
8728 DAG.getConstant(X86::COND_E, MVT::i8),
8731 Op = DAG.getNode(X86ISD::CMOV, dl, OpVT, Ops, array_lengthof(Ops));
8734 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
8738 SDValue X86TargetLowering::LowerMUL_V2I64(SDValue Op, SelectionDAG &DAG) const {
8739 EVT VT = Op.getValueType();
8740 assert(VT == MVT::v2i64 && "Only know how to lower V2I64 multiply");
8741 DebugLoc dl = Op.getDebugLoc();
8743 // ulong2 Ahi = __builtin_ia32_psrlqi128( a, 32);
8744 // ulong2 Bhi = __builtin_ia32_psrlqi128( b, 32);
8745 // ulong2 AloBlo = __builtin_ia32_pmuludq128( a, b );
8746 // ulong2 AloBhi = __builtin_ia32_pmuludq128( a, Bhi );
8747 // ulong2 AhiBlo = __builtin_ia32_pmuludq128( Ahi, b );
8749 // AloBhi = __builtin_ia32_psllqi128( AloBhi, 32 );
8750 // AhiBlo = __builtin_ia32_psllqi128( AhiBlo, 32 );
8751 // return AloBlo + AloBhi + AhiBlo;
8753 SDValue A = Op.getOperand(0);
8754 SDValue B = Op.getOperand(1);
8756 SDValue Ahi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8757 DAG.getConstant(Intrinsic::x86_sse2_psrli_q, MVT::i32),
8758 A, DAG.getConstant(32, MVT::i32));
8759 SDValue Bhi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8760 DAG.getConstant(Intrinsic::x86_sse2_psrli_q, MVT::i32),
8761 B, DAG.getConstant(32, MVT::i32));
8762 SDValue AloBlo = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8763 DAG.getConstant(Intrinsic::x86_sse2_pmulu_dq, MVT::i32),
8765 SDValue AloBhi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8766 DAG.getConstant(Intrinsic::x86_sse2_pmulu_dq, MVT::i32),
8768 SDValue AhiBlo = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8769 DAG.getConstant(Intrinsic::x86_sse2_pmulu_dq, MVT::i32),
8771 AloBhi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8772 DAG.getConstant(Intrinsic::x86_sse2_pslli_q, MVT::i32),
8773 AloBhi, DAG.getConstant(32, MVT::i32));
8774 AhiBlo = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8775 DAG.getConstant(Intrinsic::x86_sse2_pslli_q, MVT::i32),
8776 AhiBlo, DAG.getConstant(32, MVT::i32));
8777 SDValue Res = DAG.getNode(ISD::ADD, dl, VT, AloBlo, AloBhi);
8778 Res = DAG.getNode(ISD::ADD, dl, VT, Res, AhiBlo);
8782 SDValue X86TargetLowering::LowerSHL(SDValue Op, SelectionDAG &DAG) const {
8783 EVT VT = Op.getValueType();
8784 DebugLoc dl = Op.getDebugLoc();
8785 SDValue R = Op.getOperand(0);
8787 LLVMContext *Context = DAG.getContext();
8789 assert(Subtarget->hasSSE41() && "Cannot lower SHL without SSE4.1 or later");
8791 if (VT == MVT::v4i32) {
8792 Op = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8793 DAG.getConstant(Intrinsic::x86_sse2_pslli_d, MVT::i32),
8794 Op.getOperand(1), DAG.getConstant(23, MVT::i32));
8796 ConstantInt *CI = ConstantInt::get(*Context, APInt(32, 0x3f800000U));
8798 std::vector<Constant*> CV(4, CI);
8799 Constant *C = ConstantVector::get(CV);
8800 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
8801 SDValue Addend = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
8802 MachinePointerInfo::getConstantPool(),
8805 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Addend);
8806 Op = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, Op);
8807 Op = DAG.getNode(ISD::FP_TO_SINT, dl, VT, Op);
8808 return DAG.getNode(ISD::MUL, dl, VT, Op, R);
8810 if (VT == MVT::v16i8) {
8812 Op = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8813 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32),
8814 Op.getOperand(1), DAG.getConstant(5, MVT::i32));
8816 ConstantInt *CM1 = ConstantInt::get(*Context, APInt(8, 15));
8817 ConstantInt *CM2 = ConstantInt::get(*Context, APInt(8, 63));
8819 std::vector<Constant*> CVM1(16, CM1);
8820 std::vector<Constant*> CVM2(16, CM2);
8821 Constant *C = ConstantVector::get(CVM1);
8822 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
8823 SDValue M = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
8824 MachinePointerInfo::getConstantPool(),
8827 // r = pblendv(r, psllw(r & (char16)15, 4), a);
8828 M = DAG.getNode(ISD::AND, dl, VT, R, M);
8829 M = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8830 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32), M,
8831 DAG.getConstant(4, MVT::i32));
8832 R = DAG.getNode(X86ISD::PBLENDVB, dl, VT, R, M, Op);
8834 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Op);
8836 C = ConstantVector::get(CVM2);
8837 CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
8838 M = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
8839 MachinePointerInfo::getConstantPool(),
8842 // r = pblendv(r, psllw(r & (char16)63, 2), a);
8843 M = DAG.getNode(ISD::AND, dl, VT, R, M);
8844 M = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8845 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32), M,
8846 DAG.getConstant(2, MVT::i32));
8847 R = DAG.getNode(X86ISD::PBLENDVB, dl, VT, R, M, Op);
8849 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Op);
8851 // return pblendv(r, r+r, a);
8852 R = DAG.getNode(X86ISD::PBLENDVB, dl, VT,
8853 R, DAG.getNode(ISD::ADD, dl, VT, R, R), Op);
8859 SDValue X86TargetLowering::LowerXALUO(SDValue Op, SelectionDAG &DAG) const {
8860 // Lower the "add/sub/mul with overflow" instruction into a regular ins plus
8861 // a "setcc" instruction that checks the overflow flag. The "brcond" lowering
8862 // looks for this combo and may remove the "setcc" instruction if the "setcc"
8863 // has only one use.
8864 SDNode *N = Op.getNode();
8865 SDValue LHS = N->getOperand(0);
8866 SDValue RHS = N->getOperand(1);
8867 unsigned BaseOp = 0;
8869 DebugLoc DL = Op.getDebugLoc();
8870 switch (Op.getOpcode()) {
8871 default: llvm_unreachable("Unknown ovf instruction!");
8873 // A subtract of one will be selected as a INC. Note that INC doesn't
8874 // set CF, so we can't do this for UADDO.
8875 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS))
8877 BaseOp = X86ISD::INC;
8881 BaseOp = X86ISD::ADD;
8885 BaseOp = X86ISD::ADD;
8889 // A subtract of one will be selected as a DEC. Note that DEC doesn't
8890 // set CF, so we can't do this for USUBO.
8891 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS))
8893 BaseOp = X86ISD::DEC;
8897 BaseOp = X86ISD::SUB;
8901 BaseOp = X86ISD::SUB;
8905 BaseOp = X86ISD::SMUL;
8908 case ISD::UMULO: { // i64, i8 = umulo lhs, rhs --> i64, i64, i32 umul lhs,rhs
8909 SDVTList VTs = DAG.getVTList(N->getValueType(0), N->getValueType(0),
8911 SDValue Sum = DAG.getNode(X86ISD::UMUL, DL, VTs, LHS, RHS);
8914 DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
8915 DAG.getConstant(X86::COND_O, MVT::i32),
8916 SDValue(Sum.getNode(), 2));
8918 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), SetCC);
8923 // Also sets EFLAGS.
8924 SDVTList VTs = DAG.getVTList(N->getValueType(0), MVT::i32);
8925 SDValue Sum = DAG.getNode(BaseOp, DL, VTs, LHS, RHS);
8928 DAG.getNode(X86ISD::SETCC, DL, N->getValueType(1),
8929 DAG.getConstant(Cond, MVT::i32),
8930 SDValue(Sum.getNode(), 1));
8932 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), SetCC);
8936 SDValue X86TargetLowering::LowerMEMBARRIER(SDValue Op, SelectionDAG &DAG) const{
8937 DebugLoc dl = Op.getDebugLoc();
8939 if (!Subtarget->hasSSE2()) {
8940 SDValue Chain = Op.getOperand(0);
8941 SDValue Zero = DAG.getConstant(0,
8942 Subtarget->is64Bit() ? MVT::i64 : MVT::i32);
8944 DAG.getRegister(X86::ESP, MVT::i32), // Base
8945 DAG.getTargetConstant(1, MVT::i8), // Scale
8946 DAG.getRegister(0, MVT::i32), // Index
8947 DAG.getTargetConstant(0, MVT::i32), // Disp
8948 DAG.getRegister(0, MVT::i32), // Segment.
8953 DAG.getMachineNode(X86::OR32mrLocked, dl, MVT::Other, Ops,
8954 array_lengthof(Ops));
8955 return SDValue(Res, 0);
8958 unsigned isDev = cast<ConstantSDNode>(Op.getOperand(5))->getZExtValue();
8960 return DAG.getNode(X86ISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0));
8962 unsigned Op1 = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
8963 unsigned Op2 = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue();
8964 unsigned Op3 = cast<ConstantSDNode>(Op.getOperand(3))->getZExtValue();
8965 unsigned Op4 = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue();
8967 // def : Pat<(membarrier (i8 0), (i8 0), (i8 0), (i8 1), (i8 1)), (SFENCE)>;
8968 if (!Op1 && !Op2 && !Op3 && Op4)
8969 return DAG.getNode(X86ISD::SFENCE, dl, MVT::Other, Op.getOperand(0));
8971 // def : Pat<(membarrier (i8 1), (i8 0), (i8 0), (i8 0), (i8 1)), (LFENCE)>;
8972 if (Op1 && !Op2 && !Op3 && !Op4)
8973 return DAG.getNode(X86ISD::LFENCE, dl, MVT::Other, Op.getOperand(0));
8975 // def : Pat<(membarrier (i8 imm), (i8 imm), (i8 imm), (i8 imm), (i8 1)),
8977 return DAG.getNode(X86ISD::MFENCE, dl, MVT::Other, Op.getOperand(0));
8980 SDValue X86TargetLowering::LowerCMP_SWAP(SDValue Op, SelectionDAG &DAG) const {
8981 EVT T = Op.getValueType();
8982 DebugLoc DL = Op.getDebugLoc();
8985 switch(T.getSimpleVT().SimpleTy) {
8987 assert(false && "Invalid value type!");
8988 case MVT::i8: Reg = X86::AL; size = 1; break;
8989 case MVT::i16: Reg = X86::AX; size = 2; break;
8990 case MVT::i32: Reg = X86::EAX; size = 4; break;
8992 assert(Subtarget->is64Bit() && "Node not type legal!");
8993 Reg = X86::RAX; size = 8;
8996 SDValue cpIn = DAG.getCopyToReg(Op.getOperand(0), DL, Reg,
8997 Op.getOperand(2), SDValue());
8998 SDValue Ops[] = { cpIn.getValue(0),
9001 DAG.getTargetConstant(size, MVT::i8),
9003 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
9004 MachineMemOperand *MMO = cast<AtomicSDNode>(Op)->getMemOperand();
9005 SDValue Result = DAG.getMemIntrinsicNode(X86ISD::LCMPXCHG_DAG, DL, Tys,
9008 DAG.getCopyFromReg(Result.getValue(0), DL, Reg, T, Result.getValue(1));
9012 SDValue X86TargetLowering::LowerREADCYCLECOUNTER(SDValue Op,
9013 SelectionDAG &DAG) const {
9014 assert(Subtarget->is64Bit() && "Result not type legalized?");
9015 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
9016 SDValue TheChain = Op.getOperand(0);
9017 DebugLoc dl = Op.getDebugLoc();
9018 SDValue rd = DAG.getNode(X86ISD::RDTSC_DAG, dl, Tys, &TheChain, 1);
9019 SDValue rax = DAG.getCopyFromReg(rd, dl, X86::RAX, MVT::i64, rd.getValue(1));
9020 SDValue rdx = DAG.getCopyFromReg(rax.getValue(1), dl, X86::RDX, MVT::i64,
9022 SDValue Tmp = DAG.getNode(ISD::SHL, dl, MVT::i64, rdx,
9023 DAG.getConstant(32, MVT::i8));
9025 DAG.getNode(ISD::OR, dl, MVT::i64, rax, Tmp),
9028 return DAG.getMergeValues(Ops, 2, dl);
9031 SDValue X86TargetLowering::LowerBITCAST(SDValue Op,
9032 SelectionDAG &DAG) const {
9033 EVT SrcVT = Op.getOperand(0).getValueType();
9034 EVT DstVT = Op.getValueType();
9035 assert(Subtarget->is64Bit() && !Subtarget->hasSSE2() &&
9036 Subtarget->hasMMX() && "Unexpected custom BITCAST");
9037 assert((DstVT == MVT::i64 ||
9038 (DstVT.isVector() && DstVT.getSizeInBits()==64)) &&
9039 "Unexpected custom BITCAST");
9040 // i64 <=> MMX conversions are Legal.
9041 if (SrcVT==MVT::i64 && DstVT.isVector())
9043 if (DstVT==MVT::i64 && SrcVT.isVector())
9045 // MMX <=> MMX conversions are Legal.
9046 if (SrcVT.isVector() && DstVT.isVector())
9048 // All other conversions need to be expanded.
9052 SDValue X86TargetLowering::LowerLOAD_SUB(SDValue Op, SelectionDAG &DAG) const {
9053 SDNode *Node = Op.getNode();
9054 DebugLoc dl = Node->getDebugLoc();
9055 EVT T = Node->getValueType(0);
9056 SDValue negOp = DAG.getNode(ISD::SUB, dl, T,
9057 DAG.getConstant(0, T), Node->getOperand(2));
9058 return DAG.getAtomic(ISD::ATOMIC_LOAD_ADD, dl,
9059 cast<AtomicSDNode>(Node)->getMemoryVT(),
9060 Node->getOperand(0),
9061 Node->getOperand(1), negOp,
9062 cast<AtomicSDNode>(Node)->getSrcValue(),
9063 cast<AtomicSDNode>(Node)->getAlignment());
9066 static SDValue LowerADDC_ADDE_SUBC_SUBE(SDValue Op, SelectionDAG &DAG) {
9067 EVT VT = Op.getNode()->getValueType(0);
9069 // Let legalize expand this if it isn't a legal type yet.
9070 if (!DAG.getTargetLoweringInfo().isTypeLegal(VT))
9073 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
9076 bool ExtraOp = false;
9077 switch (Op.getOpcode()) {
9078 default: assert(0 && "Invalid code");
9079 case ISD::ADDC: Opc = X86ISD::ADD; break;
9080 case ISD::ADDE: Opc = X86ISD::ADC; ExtraOp = true; break;
9081 case ISD::SUBC: Opc = X86ISD::SUB; break;
9082 case ISD::SUBE: Opc = X86ISD::SBB; ExtraOp = true; break;
9086 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
9088 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
9089 Op.getOperand(1), Op.getOperand(2));
9092 /// LowerOperation - Provide custom lowering hooks for some operations.
9094 SDValue X86TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
9095 switch (Op.getOpcode()) {
9096 default: llvm_unreachable("Should not custom lower this!");
9097 case ISD::MEMBARRIER: return LowerMEMBARRIER(Op,DAG);
9098 case ISD::ATOMIC_CMP_SWAP: return LowerCMP_SWAP(Op,DAG);
9099 case ISD::ATOMIC_LOAD_SUB: return LowerLOAD_SUB(Op,DAG);
9100 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG);
9101 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
9102 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
9103 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
9104 case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
9105 case ISD::EXTRACT_SUBVECTOR: return LowerEXTRACT_SUBVECTOR(Op, DAG);
9106 case ISD::INSERT_SUBVECTOR: return LowerINSERT_SUBVECTOR(Op, DAG);
9107 case ISD::SCALAR_TO_VECTOR: return LowerSCALAR_TO_VECTOR(Op, DAG);
9108 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
9109 case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
9110 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
9111 case ISD::ExternalSymbol: return LowerExternalSymbol(Op, DAG);
9112 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
9113 case ISD::SHL_PARTS:
9114 case ISD::SRA_PARTS:
9115 case ISD::SRL_PARTS: return LowerShift(Op, DAG);
9116 case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
9117 case ISD::UINT_TO_FP: return LowerUINT_TO_FP(Op, DAG);
9118 case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
9119 case ISD::FP_TO_UINT: return LowerFP_TO_UINT(Op, DAG);
9120 case ISD::FABS: return LowerFABS(Op, DAG);
9121 case ISD::FNEG: return LowerFNEG(Op, DAG);
9122 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
9123 case ISD::SETCC: return LowerSETCC(Op, DAG);
9124 case ISD::VSETCC: return LowerVSETCC(Op, DAG);
9125 case ISD::SELECT: return LowerSELECT(Op, DAG);
9126 case ISD::BRCOND: return LowerBRCOND(Op, DAG);
9127 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
9128 case ISD::VASTART: return LowerVASTART(Op, DAG);
9129 case ISD::VAARG: return LowerVAARG(Op, DAG);
9130 case ISD::VACOPY: return LowerVACOPY(Op, DAG);
9131 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
9132 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
9133 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
9134 case ISD::FRAME_TO_ARGS_OFFSET:
9135 return LowerFRAME_TO_ARGS_OFFSET(Op, DAG);
9136 case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
9137 case ISD::EH_RETURN: return LowerEH_RETURN(Op, DAG);
9138 case ISD::TRAMPOLINE: return LowerTRAMPOLINE(Op, DAG);
9139 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
9140 case ISD::CTLZ: return LowerCTLZ(Op, DAG);
9141 case ISD::CTTZ: return LowerCTTZ(Op, DAG);
9142 case ISD::MUL: return LowerMUL_V2I64(Op, DAG);
9143 case ISD::SHL: return LowerSHL(Op, DAG);
9149 case ISD::UMULO: return LowerXALUO(Op, DAG);
9150 case ISD::READCYCLECOUNTER: return LowerREADCYCLECOUNTER(Op, DAG);
9151 case ISD::BITCAST: return LowerBITCAST(Op, DAG);
9155 case ISD::SUBE: return LowerADDC_ADDE_SUBC_SUBE(Op, DAG);
9159 void X86TargetLowering::
9160 ReplaceATOMIC_BINARY_64(SDNode *Node, SmallVectorImpl<SDValue>&Results,
9161 SelectionDAG &DAG, unsigned NewOp) const {
9162 EVT T = Node->getValueType(0);
9163 DebugLoc dl = Node->getDebugLoc();
9164 assert (T == MVT::i64 && "Only know how to expand i64 atomics");
9166 SDValue Chain = Node->getOperand(0);
9167 SDValue In1 = Node->getOperand(1);
9168 SDValue In2L = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
9169 Node->getOperand(2), DAG.getIntPtrConstant(0));
9170 SDValue In2H = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
9171 Node->getOperand(2), DAG.getIntPtrConstant(1));
9172 SDValue Ops[] = { Chain, In1, In2L, In2H };
9173 SDVTList Tys = DAG.getVTList(MVT::i32, MVT::i32, MVT::Other);
9175 DAG.getMemIntrinsicNode(NewOp, dl, Tys, Ops, 4, MVT::i64,
9176 cast<MemSDNode>(Node)->getMemOperand());
9177 SDValue OpsF[] = { Result.getValue(0), Result.getValue(1)};
9178 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, OpsF, 2));
9179 Results.push_back(Result.getValue(2));
9182 /// ReplaceNodeResults - Replace a node with an illegal result type
9183 /// with a new node built out of custom code.
9184 void X86TargetLowering::ReplaceNodeResults(SDNode *N,
9185 SmallVectorImpl<SDValue>&Results,
9186 SelectionDAG &DAG) const {
9187 DebugLoc dl = N->getDebugLoc();
9188 switch (N->getOpcode()) {
9190 assert(false && "Do not know how to custom type legalize this operation!");
9196 // We don't want to expand or promote these.
9198 case ISD::FP_TO_SINT: {
9199 std::pair<SDValue,SDValue> Vals =
9200 FP_TO_INTHelper(SDValue(N, 0), DAG, true);
9201 SDValue FIST = Vals.first, StackSlot = Vals.second;
9202 if (FIST.getNode() != 0) {
9203 EVT VT = N->getValueType(0);
9204 // Return a load from the stack slot.
9205 Results.push_back(DAG.getLoad(VT, dl, FIST, StackSlot,
9206 MachinePointerInfo(), false, false, 0));
9210 case ISD::READCYCLECOUNTER: {
9211 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
9212 SDValue TheChain = N->getOperand(0);
9213 SDValue rd = DAG.getNode(X86ISD::RDTSC_DAG, dl, Tys, &TheChain, 1);
9214 SDValue eax = DAG.getCopyFromReg(rd, dl, X86::EAX, MVT::i32,
9216 SDValue edx = DAG.getCopyFromReg(eax.getValue(1), dl, X86::EDX, MVT::i32,
9218 // Use a buildpair to merge the two 32-bit values into a 64-bit one.
9219 SDValue Ops[] = { eax, edx };
9220 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Ops, 2));
9221 Results.push_back(edx.getValue(1));
9224 case ISD::ATOMIC_CMP_SWAP: {
9225 EVT T = N->getValueType(0);
9226 assert (T == MVT::i64 && "Only know how to expand i64 Cmp and Swap");
9227 SDValue cpInL, cpInH;
9228 cpInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(2),
9229 DAG.getConstant(0, MVT::i32));
9230 cpInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(2),
9231 DAG.getConstant(1, MVT::i32));
9232 cpInL = DAG.getCopyToReg(N->getOperand(0), dl, X86::EAX, cpInL, SDValue());
9233 cpInH = DAG.getCopyToReg(cpInL.getValue(0), dl, X86::EDX, cpInH,
9235 SDValue swapInL, swapInH;
9236 swapInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(3),
9237 DAG.getConstant(0, MVT::i32));
9238 swapInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(3),
9239 DAG.getConstant(1, MVT::i32));
9240 swapInL = DAG.getCopyToReg(cpInH.getValue(0), dl, X86::EBX, swapInL,
9242 swapInH = DAG.getCopyToReg(swapInL.getValue(0), dl, X86::ECX, swapInH,
9243 swapInL.getValue(1));
9244 SDValue Ops[] = { swapInH.getValue(0),
9246 swapInH.getValue(1) };
9247 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
9248 MachineMemOperand *MMO = cast<AtomicSDNode>(N)->getMemOperand();
9249 SDValue Result = DAG.getMemIntrinsicNode(X86ISD::LCMPXCHG8_DAG, dl, Tys,
9251 SDValue cpOutL = DAG.getCopyFromReg(Result.getValue(0), dl, X86::EAX,
9252 MVT::i32, Result.getValue(1));
9253 SDValue cpOutH = DAG.getCopyFromReg(cpOutL.getValue(1), dl, X86::EDX,
9254 MVT::i32, cpOutL.getValue(2));
9255 SDValue OpsF[] = { cpOutL.getValue(0), cpOutH.getValue(0)};
9256 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, OpsF, 2));
9257 Results.push_back(cpOutH.getValue(1));
9260 case ISD::ATOMIC_LOAD_ADD:
9261 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMADD64_DAG);
9263 case ISD::ATOMIC_LOAD_AND:
9264 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMAND64_DAG);
9266 case ISD::ATOMIC_LOAD_NAND:
9267 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMNAND64_DAG);
9269 case ISD::ATOMIC_LOAD_OR:
9270 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMOR64_DAG);
9272 case ISD::ATOMIC_LOAD_SUB:
9273 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMSUB64_DAG);
9275 case ISD::ATOMIC_LOAD_XOR:
9276 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMXOR64_DAG);
9278 case ISD::ATOMIC_SWAP:
9279 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMSWAP64_DAG);
9284 const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const {
9286 default: return NULL;
9287 case X86ISD::BSF: return "X86ISD::BSF";
9288 case X86ISD::BSR: return "X86ISD::BSR";
9289 case X86ISD::SHLD: return "X86ISD::SHLD";
9290 case X86ISD::SHRD: return "X86ISD::SHRD";
9291 case X86ISD::FAND: return "X86ISD::FAND";
9292 case X86ISD::FOR: return "X86ISD::FOR";
9293 case X86ISD::FXOR: return "X86ISD::FXOR";
9294 case X86ISD::FSRL: return "X86ISD::FSRL";
9295 case X86ISD::FILD: return "X86ISD::FILD";
9296 case X86ISD::FILD_FLAG: return "X86ISD::FILD_FLAG";
9297 case X86ISD::FP_TO_INT16_IN_MEM: return "X86ISD::FP_TO_INT16_IN_MEM";
9298 case X86ISD::FP_TO_INT32_IN_MEM: return "X86ISD::FP_TO_INT32_IN_MEM";
9299 case X86ISD::FP_TO_INT64_IN_MEM: return "X86ISD::FP_TO_INT64_IN_MEM";
9300 case X86ISD::FLD: return "X86ISD::FLD";
9301 case X86ISD::FST: return "X86ISD::FST";
9302 case X86ISD::CALL: return "X86ISD::CALL";
9303 case X86ISD::RDTSC_DAG: return "X86ISD::RDTSC_DAG";
9304 case X86ISD::BT: return "X86ISD::BT";
9305 case X86ISD::CMP: return "X86ISD::CMP";
9306 case X86ISD::COMI: return "X86ISD::COMI";
9307 case X86ISD::UCOMI: return "X86ISD::UCOMI";
9308 case X86ISD::SETCC: return "X86ISD::SETCC";
9309 case X86ISD::SETCC_CARRY: return "X86ISD::SETCC_CARRY";
9310 case X86ISD::CMOV: return "X86ISD::CMOV";
9311 case X86ISD::BRCOND: return "X86ISD::BRCOND";
9312 case X86ISD::RET_FLAG: return "X86ISD::RET_FLAG";
9313 case X86ISD::REP_STOS: return "X86ISD::REP_STOS";
9314 case X86ISD::REP_MOVS: return "X86ISD::REP_MOVS";
9315 case X86ISD::GlobalBaseReg: return "X86ISD::GlobalBaseReg";
9316 case X86ISD::Wrapper: return "X86ISD::Wrapper";
9317 case X86ISD::WrapperRIP: return "X86ISD::WrapperRIP";
9318 case X86ISD::PEXTRB: return "X86ISD::PEXTRB";
9319 case X86ISD::PEXTRW: return "X86ISD::PEXTRW";
9320 case X86ISD::INSERTPS: return "X86ISD::INSERTPS";
9321 case X86ISD::PINSRB: return "X86ISD::PINSRB";
9322 case X86ISD::PINSRW: return "X86ISD::PINSRW";
9323 case X86ISD::PSHUFB: return "X86ISD::PSHUFB";
9324 case X86ISD::PANDN: return "X86ISD::PANDN";
9325 case X86ISD::PSIGNB: return "X86ISD::PSIGNB";
9326 case X86ISD::PSIGNW: return "X86ISD::PSIGNW";
9327 case X86ISD::PSIGND: return "X86ISD::PSIGND";
9328 case X86ISD::PBLENDVB: return "X86ISD::PBLENDVB";
9329 case X86ISD::FMAX: return "X86ISD::FMAX";
9330 case X86ISD::FMIN: return "X86ISD::FMIN";
9331 case X86ISD::FRSQRT: return "X86ISD::FRSQRT";
9332 case X86ISD::FRCP: return "X86ISD::FRCP";
9333 case X86ISD::TLSADDR: return "X86ISD::TLSADDR";
9334 case X86ISD::TLSCALL: return "X86ISD::TLSCALL";
9335 case X86ISD::EH_RETURN: return "X86ISD::EH_RETURN";
9336 case X86ISD::TC_RETURN: return "X86ISD::TC_RETURN";
9337 case X86ISD::FNSTCW16m: return "X86ISD::FNSTCW16m";
9338 case X86ISD::LCMPXCHG_DAG: return "X86ISD::LCMPXCHG_DAG";
9339 case X86ISD::LCMPXCHG8_DAG: return "X86ISD::LCMPXCHG8_DAG";
9340 case X86ISD::ATOMADD64_DAG: return "X86ISD::ATOMADD64_DAG";
9341 case X86ISD::ATOMSUB64_DAG: return "X86ISD::ATOMSUB64_DAG";
9342 case X86ISD::ATOMOR64_DAG: return "X86ISD::ATOMOR64_DAG";
9343 case X86ISD::ATOMXOR64_DAG: return "X86ISD::ATOMXOR64_DAG";
9344 case X86ISD::ATOMAND64_DAG: return "X86ISD::ATOMAND64_DAG";
9345 case X86ISD::ATOMNAND64_DAG: return "X86ISD::ATOMNAND64_DAG";
9346 case X86ISD::VZEXT_MOVL: return "X86ISD::VZEXT_MOVL";
9347 case X86ISD::VZEXT_LOAD: return "X86ISD::VZEXT_LOAD";
9348 case X86ISD::VSHL: return "X86ISD::VSHL";
9349 case X86ISD::VSRL: return "X86ISD::VSRL";
9350 case X86ISD::CMPPD: return "X86ISD::CMPPD";
9351 case X86ISD::CMPPS: return "X86ISD::CMPPS";
9352 case X86ISD::PCMPEQB: return "X86ISD::PCMPEQB";
9353 case X86ISD::PCMPEQW: return "X86ISD::PCMPEQW";
9354 case X86ISD::PCMPEQD: return "X86ISD::PCMPEQD";
9355 case X86ISD::PCMPEQQ: return "X86ISD::PCMPEQQ";
9356 case X86ISD::PCMPGTB: return "X86ISD::PCMPGTB";
9357 case X86ISD::PCMPGTW: return "X86ISD::PCMPGTW";
9358 case X86ISD::PCMPGTD: return "X86ISD::PCMPGTD";
9359 case X86ISD::PCMPGTQ: return "X86ISD::PCMPGTQ";
9360 case X86ISD::ADD: return "X86ISD::ADD";
9361 case X86ISD::SUB: return "X86ISD::SUB";
9362 case X86ISD::ADC: return "X86ISD::ADC";
9363 case X86ISD::SBB: return "X86ISD::SBB";
9364 case X86ISD::SMUL: return "X86ISD::SMUL";
9365 case X86ISD::UMUL: return "X86ISD::UMUL";
9366 case X86ISD::INC: return "X86ISD::INC";
9367 case X86ISD::DEC: return "X86ISD::DEC";
9368 case X86ISD::OR: return "X86ISD::OR";
9369 case X86ISD::XOR: return "X86ISD::XOR";
9370 case X86ISD::AND: return "X86ISD::AND";
9371 case X86ISD::MUL_IMM: return "X86ISD::MUL_IMM";
9372 case X86ISD::PTEST: return "X86ISD::PTEST";
9373 case X86ISD::TESTP: return "X86ISD::TESTP";
9374 case X86ISD::PALIGN: return "X86ISD::PALIGN";
9375 case X86ISD::PSHUFD: return "X86ISD::PSHUFD";
9376 case X86ISD::PSHUFHW: return "X86ISD::PSHUFHW";
9377 case X86ISD::PSHUFHW_LD: return "X86ISD::PSHUFHW_LD";
9378 case X86ISD::PSHUFLW: return "X86ISD::PSHUFLW";
9379 case X86ISD::PSHUFLW_LD: return "X86ISD::PSHUFLW_LD";
9380 case X86ISD::SHUFPS: return "X86ISD::SHUFPS";
9381 case X86ISD::SHUFPD: return "X86ISD::SHUFPD";
9382 case X86ISD::MOVLHPS: return "X86ISD::MOVLHPS";
9383 case X86ISD::MOVLHPD: return "X86ISD::MOVLHPD";
9384 case X86ISD::MOVHLPS: return "X86ISD::MOVHLPS";
9385 case X86ISD::MOVHLPD: return "X86ISD::MOVHLPD";
9386 case X86ISD::MOVLPS: return "X86ISD::MOVLPS";
9387 case X86ISD::MOVLPD: return "X86ISD::MOVLPD";
9388 case X86ISD::MOVDDUP: return "X86ISD::MOVDDUP";
9389 case X86ISD::MOVSHDUP: return "X86ISD::MOVSHDUP";
9390 case X86ISD::MOVSLDUP: return "X86ISD::MOVSLDUP";
9391 case X86ISD::MOVSHDUP_LD: return "X86ISD::MOVSHDUP_LD";
9392 case X86ISD::MOVSLDUP_LD: return "X86ISD::MOVSLDUP_LD";
9393 case X86ISD::MOVSD: return "X86ISD::MOVSD";
9394 case X86ISD::MOVSS: return "X86ISD::MOVSS";
9395 case X86ISD::UNPCKLPS: return "X86ISD::UNPCKLPS";
9396 case X86ISD::UNPCKLPD: return "X86ISD::UNPCKLPD";
9397 case X86ISD::VUNPCKLPS: return "X86ISD::VUNPCKLPS";
9398 case X86ISD::VUNPCKLPD: return "X86ISD::VUNPCKLPD";
9399 case X86ISD::VUNPCKLPSY: return "X86ISD::VUNPCKLPSY";
9400 case X86ISD::VUNPCKLPDY: return "X86ISD::VUNPCKLPDY";
9401 case X86ISD::UNPCKHPS: return "X86ISD::UNPCKHPS";
9402 case X86ISD::UNPCKHPD: return "X86ISD::UNPCKHPD";
9403 case X86ISD::PUNPCKLBW: return "X86ISD::PUNPCKLBW";
9404 case X86ISD::PUNPCKLWD: return "X86ISD::PUNPCKLWD";
9405 case X86ISD::PUNPCKLDQ: return "X86ISD::PUNPCKLDQ";
9406 case X86ISD::PUNPCKLQDQ: return "X86ISD::PUNPCKLQDQ";
9407 case X86ISD::PUNPCKHBW: return "X86ISD::PUNPCKHBW";
9408 case X86ISD::PUNPCKHWD: return "X86ISD::PUNPCKHWD";
9409 case X86ISD::PUNPCKHDQ: return "X86ISD::PUNPCKHDQ";
9410 case X86ISD::PUNPCKHQDQ: return "X86ISD::PUNPCKHQDQ";
9411 case X86ISD::VASTART_SAVE_XMM_REGS: return "X86ISD::VASTART_SAVE_XMM_REGS";
9412 case X86ISD::VAARG_64: return "X86ISD::VAARG_64";
9413 case X86ISD::WIN_ALLOCA: return "X86ISD::WIN_ALLOCA";
9417 // isLegalAddressingMode - Return true if the addressing mode represented
9418 // by AM is legal for this target, for a load/store of the specified type.
9419 bool X86TargetLowering::isLegalAddressingMode(const AddrMode &AM,
9420 const Type *Ty) const {
9421 // X86 supports extremely general addressing modes.
9422 CodeModel::Model M = getTargetMachine().getCodeModel();
9423 Reloc::Model R = getTargetMachine().getRelocationModel();
9425 // X86 allows a sign-extended 32-bit immediate field as a displacement.
9426 if (!X86::isOffsetSuitableForCodeModel(AM.BaseOffs, M, AM.BaseGV != NULL))
9431 Subtarget->ClassifyGlobalReference(AM.BaseGV, getTargetMachine());
9433 // If a reference to this global requires an extra load, we can't fold it.
9434 if (isGlobalStubReference(GVFlags))
9437 // If BaseGV requires a register for the PIC base, we cannot also have a
9438 // BaseReg specified.
9439 if (AM.HasBaseReg && isGlobalRelativeToPICBase(GVFlags))
9442 // If lower 4G is not available, then we must use rip-relative addressing.
9443 if ((M != CodeModel::Small || R != Reloc::Static) &&
9444 Subtarget->is64Bit() && (AM.BaseOffs || AM.Scale > 1))
9454 // These scales always work.
9459 // These scales are formed with basereg+scalereg. Only accept if there is
9464 default: // Other stuff never works.
9472 bool X86TargetLowering::isTruncateFree(const Type *Ty1, const Type *Ty2) const {
9473 if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy())
9475 unsigned NumBits1 = Ty1->getPrimitiveSizeInBits();
9476 unsigned NumBits2 = Ty2->getPrimitiveSizeInBits();
9477 if (NumBits1 <= NumBits2)
9482 bool X86TargetLowering::isTruncateFree(EVT VT1, EVT VT2) const {
9483 if (!VT1.isInteger() || !VT2.isInteger())
9485 unsigned NumBits1 = VT1.getSizeInBits();
9486 unsigned NumBits2 = VT2.getSizeInBits();
9487 if (NumBits1 <= NumBits2)
9492 bool X86TargetLowering::isZExtFree(const Type *Ty1, const Type *Ty2) const {
9493 // x86-64 implicitly zero-extends 32-bit results in 64-bit registers.
9494 return Ty1->isIntegerTy(32) && Ty2->isIntegerTy(64) && Subtarget->is64Bit();
9497 bool X86TargetLowering::isZExtFree(EVT VT1, EVT VT2) const {
9498 // x86-64 implicitly zero-extends 32-bit results in 64-bit registers.
9499 return VT1 == MVT::i32 && VT2 == MVT::i64 && Subtarget->is64Bit();
9502 bool X86TargetLowering::isNarrowingProfitable(EVT VT1, EVT VT2) const {
9503 // i16 instructions are longer (0x66 prefix) and potentially slower.
9504 return !(VT1 == MVT::i32 && VT2 == MVT::i16);
9507 /// isShuffleMaskLegal - Targets can use this to indicate that they only
9508 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
9509 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
9510 /// are assumed to be legal.
9512 X86TargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &M,
9514 // Very little shuffling can be done for 64-bit vectors right now.
9515 if (VT.getSizeInBits() == 64)
9516 return isPALIGNRMask(M, VT, Subtarget->hasSSSE3());
9518 // FIXME: pshufb, blends, shifts.
9519 return (VT.getVectorNumElements() == 2 ||
9520 ShuffleVectorSDNode::isSplatMask(&M[0], VT) ||
9521 isMOVLMask(M, VT) ||
9522 isSHUFPMask(M, VT) ||
9523 isPSHUFDMask(M, VT) ||
9524 isPSHUFHWMask(M, VT) ||
9525 isPSHUFLWMask(M, VT) ||
9526 isPALIGNRMask(M, VT, Subtarget->hasSSSE3()) ||
9527 isUNPCKLMask(M, VT) ||
9528 isUNPCKHMask(M, VT) ||
9529 isUNPCKL_v_undef_Mask(M, VT) ||
9530 isUNPCKH_v_undef_Mask(M, VT));
9534 X86TargetLowering::isVectorClearMaskLegal(const SmallVectorImpl<int> &Mask,
9536 unsigned NumElts = VT.getVectorNumElements();
9537 // FIXME: This collection of masks seems suspect.
9540 if (NumElts == 4 && VT.getSizeInBits() == 128) {
9541 return (isMOVLMask(Mask, VT) ||
9542 isCommutedMOVLMask(Mask, VT, true) ||
9543 isSHUFPMask(Mask, VT) ||
9544 isCommutedSHUFPMask(Mask, VT));
9549 //===----------------------------------------------------------------------===//
9550 // X86 Scheduler Hooks
9551 //===----------------------------------------------------------------------===//
9553 // private utility function
9555 X86TargetLowering::EmitAtomicBitwiseWithCustomInserter(MachineInstr *bInstr,
9556 MachineBasicBlock *MBB,
9563 TargetRegisterClass *RC,
9564 bool invSrc) const {
9565 // For the atomic bitwise operator, we generate
9568 // ld t1 = [bitinstr.addr]
9569 // op t2 = t1, [bitinstr.val]
9571 // lcs dest = [bitinstr.addr], t2 [EAX is implicit]
9573 // fallthrough -->nextMBB
9574 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
9575 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
9576 MachineFunction::iterator MBBIter = MBB;
9579 /// First build the CFG
9580 MachineFunction *F = MBB->getParent();
9581 MachineBasicBlock *thisMBB = MBB;
9582 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
9583 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
9584 F->insert(MBBIter, newMBB);
9585 F->insert(MBBIter, nextMBB);
9587 // Transfer the remainder of thisMBB and its successor edges to nextMBB.
9588 nextMBB->splice(nextMBB->begin(), thisMBB,
9589 llvm::next(MachineBasicBlock::iterator(bInstr)),
9591 nextMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
9593 // Update thisMBB to fall through to newMBB
9594 thisMBB->addSuccessor(newMBB);
9596 // newMBB jumps to itself and fall through to nextMBB
9597 newMBB->addSuccessor(nextMBB);
9598 newMBB->addSuccessor(newMBB);
9600 // Insert instructions into newMBB based on incoming instruction
9601 assert(bInstr->getNumOperands() < X86::AddrNumOperands + 4 &&
9602 "unexpected number of operands");
9603 DebugLoc dl = bInstr->getDebugLoc();
9604 MachineOperand& destOper = bInstr->getOperand(0);
9605 MachineOperand* argOpers[2 + X86::AddrNumOperands];
9606 int numArgs = bInstr->getNumOperands() - 1;
9607 for (int i=0; i < numArgs; ++i)
9608 argOpers[i] = &bInstr->getOperand(i+1);
9610 // x86 address has 4 operands: base, index, scale, and displacement
9611 int lastAddrIndx = X86::AddrNumOperands - 1; // [0,3]
9612 int valArgIndx = lastAddrIndx + 1;
9614 unsigned t1 = F->getRegInfo().createVirtualRegister(RC);
9615 MachineInstrBuilder MIB = BuildMI(newMBB, dl, TII->get(LoadOpc), t1);
9616 for (int i=0; i <= lastAddrIndx; ++i)
9617 (*MIB).addOperand(*argOpers[i]);
9619 unsigned tt = F->getRegInfo().createVirtualRegister(RC);
9621 MIB = BuildMI(newMBB, dl, TII->get(notOpc), tt).addReg(t1);
9626 unsigned t2 = F->getRegInfo().createVirtualRegister(RC);
9627 assert((argOpers[valArgIndx]->isReg() ||
9628 argOpers[valArgIndx]->isImm()) &&
9630 if (argOpers[valArgIndx]->isReg())
9631 MIB = BuildMI(newMBB, dl, TII->get(regOpc), t2);
9633 MIB = BuildMI(newMBB, dl, TII->get(immOpc), t2);
9635 (*MIB).addOperand(*argOpers[valArgIndx]);
9637 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), EAXreg);
9640 MIB = BuildMI(newMBB, dl, TII->get(CXchgOpc));
9641 for (int i=0; i <= lastAddrIndx; ++i)
9642 (*MIB).addOperand(*argOpers[i]);
9644 assert(bInstr->hasOneMemOperand() && "Unexpected number of memoperand");
9645 (*MIB).setMemRefs(bInstr->memoperands_begin(),
9646 bInstr->memoperands_end());
9648 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), destOper.getReg());
9652 BuildMI(newMBB, dl, TII->get(X86::JNE_4)).addMBB(newMBB);
9654 bInstr->eraseFromParent(); // The pseudo instruction is gone now.
9658 // private utility function: 64 bit atomics on 32 bit host.
9660 X86TargetLowering::EmitAtomicBit6432WithCustomInserter(MachineInstr *bInstr,
9661 MachineBasicBlock *MBB,
9666 bool invSrc) const {
9667 // For the atomic bitwise operator, we generate
9668 // thisMBB (instructions are in pairs, except cmpxchg8b)
9669 // ld t1,t2 = [bitinstr.addr]
9671 // out1, out2 = phi (thisMBB, t1/t2) (newMBB, t3/t4)
9672 // op t5, t6 <- out1, out2, [bitinstr.val]
9673 // (for SWAP, substitute: mov t5, t6 <- [bitinstr.val])
9674 // mov ECX, EBX <- t5, t6
9675 // mov EAX, EDX <- t1, t2
9676 // cmpxchg8b [bitinstr.addr] [EAX, EDX, EBX, ECX implicit]
9677 // mov t3, t4 <- EAX, EDX
9679 // result in out1, out2
9680 // fallthrough -->nextMBB
9682 const TargetRegisterClass *RC = X86::GR32RegisterClass;
9683 const unsigned LoadOpc = X86::MOV32rm;
9684 const unsigned NotOpc = X86::NOT32r;
9685 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
9686 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
9687 MachineFunction::iterator MBBIter = MBB;
9690 /// First build the CFG
9691 MachineFunction *F = MBB->getParent();
9692 MachineBasicBlock *thisMBB = MBB;
9693 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
9694 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
9695 F->insert(MBBIter, newMBB);
9696 F->insert(MBBIter, nextMBB);
9698 // Transfer the remainder of thisMBB and its successor edges to nextMBB.
9699 nextMBB->splice(nextMBB->begin(), thisMBB,
9700 llvm::next(MachineBasicBlock::iterator(bInstr)),
9702 nextMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
9704 // Update thisMBB to fall through to newMBB
9705 thisMBB->addSuccessor(newMBB);
9707 // newMBB jumps to itself and fall through to nextMBB
9708 newMBB->addSuccessor(nextMBB);
9709 newMBB->addSuccessor(newMBB);
9711 DebugLoc dl = bInstr->getDebugLoc();
9712 // Insert instructions into newMBB based on incoming instruction
9713 // There are 8 "real" operands plus 9 implicit def/uses, ignored here.
9714 assert(bInstr->getNumOperands() < X86::AddrNumOperands + 14 &&
9715 "unexpected number of operands");
9716 MachineOperand& dest1Oper = bInstr->getOperand(0);
9717 MachineOperand& dest2Oper = bInstr->getOperand(1);
9718 MachineOperand* argOpers[2 + X86::AddrNumOperands];
9719 for (int i=0; i < 2 + X86::AddrNumOperands; ++i) {
9720 argOpers[i] = &bInstr->getOperand(i+2);
9722 // We use some of the operands multiple times, so conservatively just
9723 // clear any kill flags that might be present.
9724 if (argOpers[i]->isReg() && argOpers[i]->isUse())
9725 argOpers[i]->setIsKill(false);
9728 // x86 address has 5 operands: base, index, scale, displacement, and segment.
9729 int lastAddrIndx = X86::AddrNumOperands - 1; // [0,3]
9731 unsigned t1 = F->getRegInfo().createVirtualRegister(RC);
9732 MachineInstrBuilder MIB = BuildMI(thisMBB, dl, TII->get(LoadOpc), t1);
9733 for (int i=0; i <= lastAddrIndx; ++i)
9734 (*MIB).addOperand(*argOpers[i]);
9735 unsigned t2 = F->getRegInfo().createVirtualRegister(RC);
9736 MIB = BuildMI(thisMBB, dl, TII->get(LoadOpc), t2);
9737 // add 4 to displacement.
9738 for (int i=0; i <= lastAddrIndx-2; ++i)
9739 (*MIB).addOperand(*argOpers[i]);
9740 MachineOperand newOp3 = *(argOpers[3]);
9742 newOp3.setImm(newOp3.getImm()+4);
9744 newOp3.setOffset(newOp3.getOffset()+4);
9745 (*MIB).addOperand(newOp3);
9746 (*MIB).addOperand(*argOpers[lastAddrIndx]);
9748 // t3/4 are defined later, at the bottom of the loop
9749 unsigned t3 = F->getRegInfo().createVirtualRegister(RC);
9750 unsigned t4 = F->getRegInfo().createVirtualRegister(RC);
9751 BuildMI(newMBB, dl, TII->get(X86::PHI), dest1Oper.getReg())
9752 .addReg(t1).addMBB(thisMBB).addReg(t3).addMBB(newMBB);
9753 BuildMI(newMBB, dl, TII->get(X86::PHI), dest2Oper.getReg())
9754 .addReg(t2).addMBB(thisMBB).addReg(t4).addMBB(newMBB);
9756 // The subsequent operations should be using the destination registers of
9757 //the PHI instructions.
9759 t1 = F->getRegInfo().createVirtualRegister(RC);
9760 t2 = F->getRegInfo().createVirtualRegister(RC);
9761 MIB = BuildMI(newMBB, dl, TII->get(NotOpc), t1).addReg(dest1Oper.getReg());
9762 MIB = BuildMI(newMBB, dl, TII->get(NotOpc), t2).addReg(dest2Oper.getReg());
9764 t1 = dest1Oper.getReg();
9765 t2 = dest2Oper.getReg();
9768 int valArgIndx = lastAddrIndx + 1;
9769 assert((argOpers[valArgIndx]->isReg() ||
9770 argOpers[valArgIndx]->isImm()) &&
9772 unsigned t5 = F->getRegInfo().createVirtualRegister(RC);
9773 unsigned t6 = F->getRegInfo().createVirtualRegister(RC);
9774 if (argOpers[valArgIndx]->isReg())
9775 MIB = BuildMI(newMBB, dl, TII->get(regOpcL), t5);
9777 MIB = BuildMI(newMBB, dl, TII->get(immOpcL), t5);
9778 if (regOpcL != X86::MOV32rr)
9780 (*MIB).addOperand(*argOpers[valArgIndx]);
9781 assert(argOpers[valArgIndx + 1]->isReg() ==
9782 argOpers[valArgIndx]->isReg());
9783 assert(argOpers[valArgIndx + 1]->isImm() ==
9784 argOpers[valArgIndx]->isImm());
9785 if (argOpers[valArgIndx + 1]->isReg())
9786 MIB = BuildMI(newMBB, dl, TII->get(regOpcH), t6);
9788 MIB = BuildMI(newMBB, dl, TII->get(immOpcH), t6);
9789 if (regOpcH != X86::MOV32rr)
9791 (*MIB).addOperand(*argOpers[valArgIndx + 1]);
9793 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EAX);
9795 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EDX);
9798 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EBX);
9800 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::ECX);
9803 MIB = BuildMI(newMBB, dl, TII->get(X86::LCMPXCHG8B));
9804 for (int i=0; i <= lastAddrIndx; ++i)
9805 (*MIB).addOperand(*argOpers[i]);
9807 assert(bInstr->hasOneMemOperand() && "Unexpected number of memoperand");
9808 (*MIB).setMemRefs(bInstr->memoperands_begin(),
9809 bInstr->memoperands_end());
9811 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), t3);
9812 MIB.addReg(X86::EAX);
9813 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), t4);
9814 MIB.addReg(X86::EDX);
9817 BuildMI(newMBB, dl, TII->get(X86::JNE_4)).addMBB(newMBB);
9819 bInstr->eraseFromParent(); // The pseudo instruction is gone now.
9823 // private utility function
9825 X86TargetLowering::EmitAtomicMinMaxWithCustomInserter(MachineInstr *mInstr,
9826 MachineBasicBlock *MBB,
9827 unsigned cmovOpc) const {
9828 // For the atomic min/max operator, we generate
9831 // ld t1 = [min/max.addr]
9832 // mov t2 = [min/max.val]
9834 // cmov[cond] t2 = t1
9836 // lcs dest = [bitinstr.addr], t2 [EAX is implicit]
9838 // fallthrough -->nextMBB
9840 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
9841 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
9842 MachineFunction::iterator MBBIter = MBB;
9845 /// First build the CFG
9846 MachineFunction *F = MBB->getParent();
9847 MachineBasicBlock *thisMBB = MBB;
9848 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
9849 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
9850 F->insert(MBBIter, newMBB);
9851 F->insert(MBBIter, nextMBB);
9853 // Transfer the remainder of thisMBB and its successor edges to nextMBB.
9854 nextMBB->splice(nextMBB->begin(), thisMBB,
9855 llvm::next(MachineBasicBlock::iterator(mInstr)),
9857 nextMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
9859 // Update thisMBB to fall through to newMBB
9860 thisMBB->addSuccessor(newMBB);
9862 // newMBB jumps to newMBB and fall through to nextMBB
9863 newMBB->addSuccessor(nextMBB);
9864 newMBB->addSuccessor(newMBB);
9866 DebugLoc dl = mInstr->getDebugLoc();
9867 // Insert instructions into newMBB based on incoming instruction
9868 assert(mInstr->getNumOperands() < X86::AddrNumOperands + 4 &&
9869 "unexpected number of operands");
9870 MachineOperand& destOper = mInstr->getOperand(0);
9871 MachineOperand* argOpers[2 + X86::AddrNumOperands];
9872 int numArgs = mInstr->getNumOperands() - 1;
9873 for (int i=0; i < numArgs; ++i)
9874 argOpers[i] = &mInstr->getOperand(i+1);
9876 // x86 address has 4 operands: base, index, scale, and displacement
9877 int lastAddrIndx = X86::AddrNumOperands - 1; // [0,3]
9878 int valArgIndx = lastAddrIndx + 1;
9880 unsigned t1 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
9881 MachineInstrBuilder MIB = BuildMI(newMBB, dl, TII->get(X86::MOV32rm), t1);
9882 for (int i=0; i <= lastAddrIndx; ++i)
9883 (*MIB).addOperand(*argOpers[i]);
9885 // We only support register and immediate values
9886 assert((argOpers[valArgIndx]->isReg() ||
9887 argOpers[valArgIndx]->isImm()) &&
9890 unsigned t2 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
9891 if (argOpers[valArgIndx]->isReg())
9892 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), t2);
9894 MIB = BuildMI(newMBB, dl, TII->get(X86::MOV32rr), t2);
9895 (*MIB).addOperand(*argOpers[valArgIndx]);
9897 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EAX);
9900 MIB = BuildMI(newMBB, dl, TII->get(X86::CMP32rr));
9905 unsigned t3 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
9906 MIB = BuildMI(newMBB, dl, TII->get(cmovOpc),t3);
9910 // Cmp and exchange if none has modified the memory location
9911 MIB = BuildMI(newMBB, dl, TII->get(X86::LCMPXCHG32));
9912 for (int i=0; i <= lastAddrIndx; ++i)
9913 (*MIB).addOperand(*argOpers[i]);
9915 assert(mInstr->hasOneMemOperand() && "Unexpected number of memoperand");
9916 (*MIB).setMemRefs(mInstr->memoperands_begin(),
9917 mInstr->memoperands_end());
9919 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), destOper.getReg());
9920 MIB.addReg(X86::EAX);
9923 BuildMI(newMBB, dl, TII->get(X86::JNE_4)).addMBB(newMBB);
9925 mInstr->eraseFromParent(); // The pseudo instruction is gone now.
9929 // FIXME: When we get size specific XMM0 registers, i.e. XMM0_V16I8
9930 // or XMM0_V32I8 in AVX all of this code can be replaced with that
9933 X86TargetLowering::EmitPCMP(MachineInstr *MI, MachineBasicBlock *BB,
9934 unsigned numArgs, bool memArg) const {
9935 assert((Subtarget->hasSSE42() || Subtarget->hasAVX()) &&
9936 "Target must have SSE4.2 or AVX features enabled");
9938 DebugLoc dl = MI->getDebugLoc();
9939 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
9941 if (!Subtarget->hasAVX()) {
9943 Opc = numArgs == 3 ? X86::PCMPISTRM128rm : X86::PCMPESTRM128rm;
9945 Opc = numArgs == 3 ? X86::PCMPISTRM128rr : X86::PCMPESTRM128rr;
9948 Opc = numArgs == 3 ? X86::VPCMPISTRM128rm : X86::VPCMPESTRM128rm;
9950 Opc = numArgs == 3 ? X86::VPCMPISTRM128rr : X86::VPCMPESTRM128rr;
9953 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(Opc));
9954 for (unsigned i = 0; i < numArgs; ++i) {
9955 MachineOperand &Op = MI->getOperand(i+1);
9956 if (!(Op.isReg() && Op.isImplicit()))
9959 BuildMI(*BB, MI, dl, TII->get(X86::MOVAPSrr), MI->getOperand(0).getReg())
9962 MI->eraseFromParent();
9967 X86TargetLowering::EmitMonitor(MachineInstr *MI, MachineBasicBlock *BB) const {
9968 DebugLoc dl = MI->getDebugLoc();
9969 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
9971 // Address into RAX/EAX, other two args into ECX, EDX.
9972 unsigned MemOpc = Subtarget->is64Bit() ? X86::LEA64r : X86::LEA32r;
9973 unsigned MemReg = Subtarget->is64Bit() ? X86::RAX : X86::EAX;
9974 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(MemOpc), MemReg);
9975 for (int i = 0; i < X86::AddrNumOperands; ++i)
9976 MIB.addOperand(MI->getOperand(i));
9978 unsigned ValOps = X86::AddrNumOperands;
9979 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::ECX)
9980 .addReg(MI->getOperand(ValOps).getReg());
9981 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::EDX)
9982 .addReg(MI->getOperand(ValOps+1).getReg());
9984 // The instruction doesn't actually take any operands though.
9985 BuildMI(*BB, MI, dl, TII->get(X86::MONITORrrr));
9987 MI->eraseFromParent(); // The pseudo is gone now.
9992 X86TargetLowering::EmitMwait(MachineInstr *MI, MachineBasicBlock *BB) const {
9993 DebugLoc dl = MI->getDebugLoc();
9994 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
9996 // First arg in ECX, the second in EAX.
9997 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::ECX)
9998 .addReg(MI->getOperand(0).getReg());
9999 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::EAX)
10000 .addReg(MI->getOperand(1).getReg());
10002 // The instruction doesn't actually take any operands though.
10003 BuildMI(*BB, MI, dl, TII->get(X86::MWAITrr));
10005 MI->eraseFromParent(); // The pseudo is gone now.
10009 MachineBasicBlock *
10010 X86TargetLowering::EmitVAARG64WithCustomInserter(
10012 MachineBasicBlock *MBB) const {
10013 // Emit va_arg instruction on X86-64.
10015 // Operands to this pseudo-instruction:
10016 // 0 ) Output : destination address (reg)
10017 // 1-5) Input : va_list address (addr, i64mem)
10018 // 6 ) ArgSize : Size (in bytes) of vararg type
10019 // 7 ) ArgMode : 0=overflow only, 1=use gp_offset, 2=use fp_offset
10020 // 8 ) Align : Alignment of type
10021 // 9 ) EFLAGS (implicit-def)
10023 assert(MI->getNumOperands() == 10 && "VAARG_64 should have 10 operands!");
10024 assert(X86::AddrNumOperands == 5 && "VAARG_64 assumes 5 address operands");
10026 unsigned DestReg = MI->getOperand(0).getReg();
10027 MachineOperand &Base = MI->getOperand(1);
10028 MachineOperand &Scale = MI->getOperand(2);
10029 MachineOperand &Index = MI->getOperand(3);
10030 MachineOperand &Disp = MI->getOperand(4);
10031 MachineOperand &Segment = MI->getOperand(5);
10032 unsigned ArgSize = MI->getOperand(6).getImm();
10033 unsigned ArgMode = MI->getOperand(7).getImm();
10034 unsigned Align = MI->getOperand(8).getImm();
10036 // Memory Reference
10037 assert(MI->hasOneMemOperand() && "Expected VAARG_64 to have one memoperand");
10038 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
10039 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
10041 // Machine Information
10042 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
10043 MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo();
10044 const TargetRegisterClass *AddrRegClass = getRegClassFor(MVT::i64);
10045 const TargetRegisterClass *OffsetRegClass = getRegClassFor(MVT::i32);
10046 DebugLoc DL = MI->getDebugLoc();
10048 // struct va_list {
10051 // i64 overflow_area (address)
10052 // i64 reg_save_area (address)
10054 // sizeof(va_list) = 24
10055 // alignment(va_list) = 8
10057 unsigned TotalNumIntRegs = 6;
10058 unsigned TotalNumXMMRegs = 8;
10059 bool UseGPOffset = (ArgMode == 1);
10060 bool UseFPOffset = (ArgMode == 2);
10061 unsigned MaxOffset = TotalNumIntRegs * 8 +
10062 (UseFPOffset ? TotalNumXMMRegs * 16 : 0);
10064 /* Align ArgSize to a multiple of 8 */
10065 unsigned ArgSizeA8 = (ArgSize + 7) & ~7;
10066 bool NeedsAlign = (Align > 8);
10068 MachineBasicBlock *thisMBB = MBB;
10069 MachineBasicBlock *overflowMBB;
10070 MachineBasicBlock *offsetMBB;
10071 MachineBasicBlock *endMBB;
10073 unsigned OffsetDestReg = 0; // Argument address computed by offsetMBB
10074 unsigned OverflowDestReg = 0; // Argument address computed by overflowMBB
10075 unsigned OffsetReg = 0;
10077 if (!UseGPOffset && !UseFPOffset) {
10078 // If we only pull from the overflow region, we don't create a branch.
10079 // We don't need to alter control flow.
10080 OffsetDestReg = 0; // unused
10081 OverflowDestReg = DestReg;
10084 overflowMBB = thisMBB;
10087 // First emit code to check if gp_offset (or fp_offset) is below the bound.
10088 // If so, pull the argument from reg_save_area. (branch to offsetMBB)
10089 // If not, pull from overflow_area. (branch to overflowMBB)
10094 // offsetMBB overflowMBB
10099 // Registers for the PHI in endMBB
10100 OffsetDestReg = MRI.createVirtualRegister(AddrRegClass);
10101 OverflowDestReg = MRI.createVirtualRegister(AddrRegClass);
10103 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
10104 MachineFunction *MF = MBB->getParent();
10105 overflowMBB = MF->CreateMachineBasicBlock(LLVM_BB);
10106 offsetMBB = MF->CreateMachineBasicBlock(LLVM_BB);
10107 endMBB = MF->CreateMachineBasicBlock(LLVM_BB);
10109 MachineFunction::iterator MBBIter = MBB;
10112 // Insert the new basic blocks
10113 MF->insert(MBBIter, offsetMBB);
10114 MF->insert(MBBIter, overflowMBB);
10115 MF->insert(MBBIter, endMBB);
10117 // Transfer the remainder of MBB and its successor edges to endMBB.
10118 endMBB->splice(endMBB->begin(), thisMBB,
10119 llvm::next(MachineBasicBlock::iterator(MI)),
10121 endMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
10123 // Make offsetMBB and overflowMBB successors of thisMBB
10124 thisMBB->addSuccessor(offsetMBB);
10125 thisMBB->addSuccessor(overflowMBB);
10127 // endMBB is a successor of both offsetMBB and overflowMBB
10128 offsetMBB->addSuccessor(endMBB);
10129 overflowMBB->addSuccessor(endMBB);
10131 // Load the offset value into a register
10132 OffsetReg = MRI.createVirtualRegister(OffsetRegClass);
10133 BuildMI(thisMBB, DL, TII->get(X86::MOV32rm), OffsetReg)
10137 .addDisp(Disp, UseFPOffset ? 4 : 0)
10138 .addOperand(Segment)
10139 .setMemRefs(MMOBegin, MMOEnd);
10141 // Check if there is enough room left to pull this argument.
10142 BuildMI(thisMBB, DL, TII->get(X86::CMP32ri))
10144 .addImm(MaxOffset + 8 - ArgSizeA8);
10146 // Branch to "overflowMBB" if offset >= max
10147 // Fall through to "offsetMBB" otherwise
10148 BuildMI(thisMBB, DL, TII->get(X86::GetCondBranchFromCond(X86::COND_AE)))
10149 .addMBB(overflowMBB);
10152 // In offsetMBB, emit code to use the reg_save_area.
10154 assert(OffsetReg != 0);
10156 // Read the reg_save_area address.
10157 unsigned RegSaveReg = MRI.createVirtualRegister(AddrRegClass);
10158 BuildMI(offsetMBB, DL, TII->get(X86::MOV64rm), RegSaveReg)
10163 .addOperand(Segment)
10164 .setMemRefs(MMOBegin, MMOEnd);
10166 // Zero-extend the offset
10167 unsigned OffsetReg64 = MRI.createVirtualRegister(AddrRegClass);
10168 BuildMI(offsetMBB, DL, TII->get(X86::SUBREG_TO_REG), OffsetReg64)
10171 .addImm(X86::sub_32bit);
10173 // Add the offset to the reg_save_area to get the final address.
10174 BuildMI(offsetMBB, DL, TII->get(X86::ADD64rr), OffsetDestReg)
10175 .addReg(OffsetReg64)
10176 .addReg(RegSaveReg);
10178 // Compute the offset for the next argument
10179 unsigned NextOffsetReg = MRI.createVirtualRegister(OffsetRegClass);
10180 BuildMI(offsetMBB, DL, TII->get(X86::ADD32ri), NextOffsetReg)
10182 .addImm(UseFPOffset ? 16 : 8);
10184 // Store it back into the va_list.
10185 BuildMI(offsetMBB, DL, TII->get(X86::MOV32mr))
10189 .addDisp(Disp, UseFPOffset ? 4 : 0)
10190 .addOperand(Segment)
10191 .addReg(NextOffsetReg)
10192 .setMemRefs(MMOBegin, MMOEnd);
10195 BuildMI(offsetMBB, DL, TII->get(X86::JMP_4))
10200 // Emit code to use overflow area
10203 // Load the overflow_area address into a register.
10204 unsigned OverflowAddrReg = MRI.createVirtualRegister(AddrRegClass);
10205 BuildMI(overflowMBB, DL, TII->get(X86::MOV64rm), OverflowAddrReg)
10210 .addOperand(Segment)
10211 .setMemRefs(MMOBegin, MMOEnd);
10213 // If we need to align it, do so. Otherwise, just copy the address
10214 // to OverflowDestReg.
10216 // Align the overflow address
10217 assert((Align & (Align-1)) == 0 && "Alignment must be a power of 2");
10218 unsigned TmpReg = MRI.createVirtualRegister(AddrRegClass);
10220 // aligned_addr = (addr + (align-1)) & ~(align-1)
10221 BuildMI(overflowMBB, DL, TII->get(X86::ADD64ri32), TmpReg)
10222 .addReg(OverflowAddrReg)
10225 BuildMI(overflowMBB, DL, TII->get(X86::AND64ri32), OverflowDestReg)
10227 .addImm(~(uint64_t)(Align-1));
10229 BuildMI(overflowMBB, DL, TII->get(TargetOpcode::COPY), OverflowDestReg)
10230 .addReg(OverflowAddrReg);
10233 // Compute the next overflow address after this argument.
10234 // (the overflow address should be kept 8-byte aligned)
10235 unsigned NextAddrReg = MRI.createVirtualRegister(AddrRegClass);
10236 BuildMI(overflowMBB, DL, TII->get(X86::ADD64ri32), NextAddrReg)
10237 .addReg(OverflowDestReg)
10238 .addImm(ArgSizeA8);
10240 // Store the new overflow address.
10241 BuildMI(overflowMBB, DL, TII->get(X86::MOV64mr))
10246 .addOperand(Segment)
10247 .addReg(NextAddrReg)
10248 .setMemRefs(MMOBegin, MMOEnd);
10250 // If we branched, emit the PHI to the front of endMBB.
10252 BuildMI(*endMBB, endMBB->begin(), DL,
10253 TII->get(X86::PHI), DestReg)
10254 .addReg(OffsetDestReg).addMBB(offsetMBB)
10255 .addReg(OverflowDestReg).addMBB(overflowMBB);
10258 // Erase the pseudo instruction
10259 MI->eraseFromParent();
10264 MachineBasicBlock *
10265 X86TargetLowering::EmitVAStartSaveXMMRegsWithCustomInserter(
10267 MachineBasicBlock *MBB) const {
10268 // Emit code to save XMM registers to the stack. The ABI says that the
10269 // number of registers to save is given in %al, so it's theoretically
10270 // possible to do an indirect jump trick to avoid saving all of them,
10271 // however this code takes a simpler approach and just executes all
10272 // of the stores if %al is non-zero. It's less code, and it's probably
10273 // easier on the hardware branch predictor, and stores aren't all that
10274 // expensive anyway.
10276 // Create the new basic blocks. One block contains all the XMM stores,
10277 // and one block is the final destination regardless of whether any
10278 // stores were performed.
10279 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
10280 MachineFunction *F = MBB->getParent();
10281 MachineFunction::iterator MBBIter = MBB;
10283 MachineBasicBlock *XMMSaveMBB = F->CreateMachineBasicBlock(LLVM_BB);
10284 MachineBasicBlock *EndMBB = F->CreateMachineBasicBlock(LLVM_BB);
10285 F->insert(MBBIter, XMMSaveMBB);
10286 F->insert(MBBIter, EndMBB);
10288 // Transfer the remainder of MBB and its successor edges to EndMBB.
10289 EndMBB->splice(EndMBB->begin(), MBB,
10290 llvm::next(MachineBasicBlock::iterator(MI)),
10292 EndMBB->transferSuccessorsAndUpdatePHIs(MBB);
10294 // The original block will now fall through to the XMM save block.
10295 MBB->addSuccessor(XMMSaveMBB);
10296 // The XMMSaveMBB will fall through to the end block.
10297 XMMSaveMBB->addSuccessor(EndMBB);
10299 // Now add the instructions.
10300 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
10301 DebugLoc DL = MI->getDebugLoc();
10303 unsigned CountReg = MI->getOperand(0).getReg();
10304 int64_t RegSaveFrameIndex = MI->getOperand(1).getImm();
10305 int64_t VarArgsFPOffset = MI->getOperand(2).getImm();
10307 if (!Subtarget->isTargetWin64()) {
10308 // If %al is 0, branch around the XMM save block.
10309 BuildMI(MBB, DL, TII->get(X86::TEST8rr)).addReg(CountReg).addReg(CountReg);
10310 BuildMI(MBB, DL, TII->get(X86::JE_4)).addMBB(EndMBB);
10311 MBB->addSuccessor(EndMBB);
10314 // In the XMM save block, save all the XMM argument registers.
10315 for (int i = 3, e = MI->getNumOperands(); i != e; ++i) {
10316 int64_t Offset = (i - 3) * 16 + VarArgsFPOffset;
10317 MachineMemOperand *MMO =
10318 F->getMachineMemOperand(
10319 MachinePointerInfo::getFixedStack(RegSaveFrameIndex, Offset),
10320 MachineMemOperand::MOStore,
10321 /*Size=*/16, /*Align=*/16);
10322 BuildMI(XMMSaveMBB, DL, TII->get(X86::MOVAPSmr))
10323 .addFrameIndex(RegSaveFrameIndex)
10324 .addImm(/*Scale=*/1)
10325 .addReg(/*IndexReg=*/0)
10326 .addImm(/*Disp=*/Offset)
10327 .addReg(/*Segment=*/0)
10328 .addReg(MI->getOperand(i).getReg())
10329 .addMemOperand(MMO);
10332 MI->eraseFromParent(); // The pseudo instruction is gone now.
10337 MachineBasicBlock *
10338 X86TargetLowering::EmitLoweredSelect(MachineInstr *MI,
10339 MachineBasicBlock *BB) const {
10340 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
10341 DebugLoc DL = MI->getDebugLoc();
10343 // To "insert" a SELECT_CC instruction, we actually have to insert the
10344 // diamond control-flow pattern. The incoming instruction knows the
10345 // destination vreg to set, the condition code register to branch on, the
10346 // true/false values to select between, and a branch opcode to use.
10347 const BasicBlock *LLVM_BB = BB->getBasicBlock();
10348 MachineFunction::iterator It = BB;
10354 // cmpTY ccX, r1, r2
10356 // fallthrough --> copy0MBB
10357 MachineBasicBlock *thisMBB = BB;
10358 MachineFunction *F = BB->getParent();
10359 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
10360 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
10361 F->insert(It, copy0MBB);
10362 F->insert(It, sinkMBB);
10364 // If the EFLAGS register isn't dead in the terminator, then claim that it's
10365 // live into the sink and copy blocks.
10366 const MachineFunction *MF = BB->getParent();
10367 const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo();
10368 BitVector ReservedRegs = TRI->getReservedRegs(*MF);
10370 for (unsigned I = 0, E = MI->getNumOperands(); I != E; ++I) {
10371 const MachineOperand &MO = MI->getOperand(I);
10372 if (!MO.isReg() || !MO.isUse() || MO.isKill()) continue;
10373 unsigned Reg = MO.getReg();
10374 if (Reg != X86::EFLAGS) continue;
10375 copy0MBB->addLiveIn(Reg);
10376 sinkMBB->addLiveIn(Reg);
10379 // Transfer the remainder of BB and its successor edges to sinkMBB.
10380 sinkMBB->splice(sinkMBB->begin(), BB,
10381 llvm::next(MachineBasicBlock::iterator(MI)),
10383 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
10385 // Add the true and fallthrough blocks as its successors.
10386 BB->addSuccessor(copy0MBB);
10387 BB->addSuccessor(sinkMBB);
10389 // Create the conditional branch instruction.
10391 X86::GetCondBranchFromCond((X86::CondCode)MI->getOperand(3).getImm());
10392 BuildMI(BB, DL, TII->get(Opc)).addMBB(sinkMBB);
10395 // %FalseValue = ...
10396 // # fallthrough to sinkMBB
10397 copy0MBB->addSuccessor(sinkMBB);
10400 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
10402 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
10403 TII->get(X86::PHI), MI->getOperand(0).getReg())
10404 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
10405 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
10407 MI->eraseFromParent(); // The pseudo instruction is gone now.
10411 MachineBasicBlock *
10412 X86TargetLowering::EmitLoweredWinAlloca(MachineInstr *MI,
10413 MachineBasicBlock *BB) const {
10414 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
10415 DebugLoc DL = MI->getDebugLoc();
10417 assert(!Subtarget->isTargetEnvMacho());
10419 // The lowering is pretty easy: we're just emitting the call to _alloca. The
10420 // non-trivial part is impdef of ESP.
10422 if (Subtarget->isTargetWin64()) {
10423 if (Subtarget->isTargetCygMing()) {
10424 // ___chkstk(Mingw64):
10425 // Clobbers R10, R11, RAX and EFLAGS.
10427 BuildMI(*BB, MI, DL, TII->get(X86::W64ALLOCA))
10428 .addExternalSymbol("___chkstk")
10429 .addReg(X86::RAX, RegState::Implicit)
10430 .addReg(X86::RSP, RegState::Implicit)
10431 .addReg(X86::RAX, RegState::Define | RegState::Implicit)
10432 .addReg(X86::RSP, RegState::Define | RegState::Implicit)
10433 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
10435 // __chkstk(MSVCRT): does not update stack pointer.
10436 // Clobbers R10, R11 and EFLAGS.
10437 // FIXME: RAX(allocated size) might be reused and not killed.
10438 BuildMI(*BB, MI, DL, TII->get(X86::W64ALLOCA))
10439 .addExternalSymbol("__chkstk")
10440 .addReg(X86::RAX, RegState::Implicit)
10441 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
10442 // RAX has the offset to subtracted from RSP.
10443 BuildMI(*BB, MI, DL, TII->get(X86::SUB64rr), X86::RSP)
10448 const char *StackProbeSymbol =
10449 Subtarget->isTargetWindows() ? "_chkstk" : "_alloca";
10451 BuildMI(*BB, MI, DL, TII->get(X86::CALLpcrel32))
10452 .addExternalSymbol(StackProbeSymbol)
10453 .addReg(X86::EAX, RegState::Implicit)
10454 .addReg(X86::ESP, RegState::Implicit)
10455 .addReg(X86::EAX, RegState::Define | RegState::Implicit)
10456 .addReg(X86::ESP, RegState::Define | RegState::Implicit)
10457 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
10460 MI->eraseFromParent(); // The pseudo instruction is gone now.
10464 MachineBasicBlock *
10465 X86TargetLowering::EmitLoweredTLSCall(MachineInstr *MI,
10466 MachineBasicBlock *BB) const {
10467 // This is pretty easy. We're taking the value that we received from
10468 // our load from the relocation, sticking it in either RDI (x86-64)
10469 // or EAX and doing an indirect call. The return value will then
10470 // be in the normal return register.
10471 const X86InstrInfo *TII
10472 = static_cast<const X86InstrInfo*>(getTargetMachine().getInstrInfo());
10473 DebugLoc DL = MI->getDebugLoc();
10474 MachineFunction *F = BB->getParent();
10476 assert(Subtarget->isTargetDarwin() && "Darwin only instr emitted?");
10477 assert(MI->getOperand(3).isGlobal() && "This should be a global");
10479 if (Subtarget->is64Bit()) {
10480 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
10481 TII->get(X86::MOV64rm), X86::RDI)
10483 .addImm(0).addReg(0)
10484 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
10485 MI->getOperand(3).getTargetFlags())
10487 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL64m));
10488 addDirectMem(MIB, X86::RDI);
10489 } else if (getTargetMachine().getRelocationModel() != Reloc::PIC_) {
10490 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
10491 TII->get(X86::MOV32rm), X86::EAX)
10493 .addImm(0).addReg(0)
10494 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
10495 MI->getOperand(3).getTargetFlags())
10497 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m));
10498 addDirectMem(MIB, X86::EAX);
10500 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
10501 TII->get(X86::MOV32rm), X86::EAX)
10502 .addReg(TII->getGlobalBaseReg(F))
10503 .addImm(0).addReg(0)
10504 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
10505 MI->getOperand(3).getTargetFlags())
10507 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m));
10508 addDirectMem(MIB, X86::EAX);
10511 MI->eraseFromParent(); // The pseudo instruction is gone now.
10515 MachineBasicBlock *
10516 X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
10517 MachineBasicBlock *BB) const {
10518 switch (MI->getOpcode()) {
10519 default: assert(false && "Unexpected instr type to insert");
10520 case X86::TAILJMPd64:
10521 case X86::TAILJMPr64:
10522 case X86::TAILJMPm64:
10523 assert(!"TAILJMP64 would not be touched here.");
10524 case X86::TCRETURNdi64:
10525 case X86::TCRETURNri64:
10526 case X86::TCRETURNmi64:
10527 // Defs of TCRETURNxx64 has Win64's callee-saved registers, as subset.
10528 // On AMD64, additional defs should be added before register allocation.
10529 if (!Subtarget->isTargetWin64()) {
10530 MI->addRegisterDefined(X86::RSI);
10531 MI->addRegisterDefined(X86::RDI);
10532 MI->addRegisterDefined(X86::XMM6);
10533 MI->addRegisterDefined(X86::XMM7);
10534 MI->addRegisterDefined(X86::XMM8);
10535 MI->addRegisterDefined(X86::XMM9);
10536 MI->addRegisterDefined(X86::XMM10);
10537 MI->addRegisterDefined(X86::XMM11);
10538 MI->addRegisterDefined(X86::XMM12);
10539 MI->addRegisterDefined(X86::XMM13);
10540 MI->addRegisterDefined(X86::XMM14);
10541 MI->addRegisterDefined(X86::XMM15);
10544 case X86::WIN_ALLOCA:
10545 return EmitLoweredWinAlloca(MI, BB);
10546 case X86::TLSCall_32:
10547 case X86::TLSCall_64:
10548 return EmitLoweredTLSCall(MI, BB);
10549 case X86::CMOV_GR8:
10550 case X86::CMOV_FR32:
10551 case X86::CMOV_FR64:
10552 case X86::CMOV_V4F32:
10553 case X86::CMOV_V2F64:
10554 case X86::CMOV_V2I64:
10555 case X86::CMOV_GR16:
10556 case X86::CMOV_GR32:
10557 case X86::CMOV_RFP32:
10558 case X86::CMOV_RFP64:
10559 case X86::CMOV_RFP80:
10560 return EmitLoweredSelect(MI, BB);
10562 case X86::FP32_TO_INT16_IN_MEM:
10563 case X86::FP32_TO_INT32_IN_MEM:
10564 case X86::FP32_TO_INT64_IN_MEM:
10565 case X86::FP64_TO_INT16_IN_MEM:
10566 case X86::FP64_TO_INT32_IN_MEM:
10567 case X86::FP64_TO_INT64_IN_MEM:
10568 case X86::FP80_TO_INT16_IN_MEM:
10569 case X86::FP80_TO_INT32_IN_MEM:
10570 case X86::FP80_TO_INT64_IN_MEM: {
10571 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
10572 DebugLoc DL = MI->getDebugLoc();
10574 // Change the floating point control register to use "round towards zero"
10575 // mode when truncating to an integer value.
10576 MachineFunction *F = BB->getParent();
10577 int CWFrameIdx = F->getFrameInfo()->CreateStackObject(2, 2, false);
10578 addFrameReference(BuildMI(*BB, MI, DL,
10579 TII->get(X86::FNSTCW16m)), CWFrameIdx);
10581 // Load the old value of the high byte of the control word...
10583 F->getRegInfo().createVirtualRegister(X86::GR16RegisterClass);
10584 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16rm), OldCW),
10587 // Set the high part to be round to zero...
10588 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mi)), CWFrameIdx)
10591 // Reload the modified control word now...
10592 addFrameReference(BuildMI(*BB, MI, DL,
10593 TII->get(X86::FLDCW16m)), CWFrameIdx);
10595 // Restore the memory image of control word to original value
10596 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mr)), CWFrameIdx)
10599 // Get the X86 opcode to use.
10601 switch (MI->getOpcode()) {
10602 default: llvm_unreachable("illegal opcode!");
10603 case X86::FP32_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m32; break;
10604 case X86::FP32_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m32; break;
10605 case X86::FP32_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m32; break;
10606 case X86::FP64_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m64; break;
10607 case X86::FP64_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m64; break;
10608 case X86::FP64_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m64; break;
10609 case X86::FP80_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m80; break;
10610 case X86::FP80_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m80; break;
10611 case X86::FP80_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m80; break;
10615 MachineOperand &Op = MI->getOperand(0);
10617 AM.BaseType = X86AddressMode::RegBase;
10618 AM.Base.Reg = Op.getReg();
10620 AM.BaseType = X86AddressMode::FrameIndexBase;
10621 AM.Base.FrameIndex = Op.getIndex();
10623 Op = MI->getOperand(1);
10625 AM.Scale = Op.getImm();
10626 Op = MI->getOperand(2);
10628 AM.IndexReg = Op.getImm();
10629 Op = MI->getOperand(3);
10630 if (Op.isGlobal()) {
10631 AM.GV = Op.getGlobal();
10633 AM.Disp = Op.getImm();
10635 addFullAddress(BuildMI(*BB, MI, DL, TII->get(Opc)), AM)
10636 .addReg(MI->getOperand(X86::AddrNumOperands).getReg());
10638 // Reload the original control word now.
10639 addFrameReference(BuildMI(*BB, MI, DL,
10640 TII->get(X86::FLDCW16m)), CWFrameIdx);
10642 MI->eraseFromParent(); // The pseudo instruction is gone now.
10645 // String/text processing lowering.
10646 case X86::PCMPISTRM128REG:
10647 case X86::VPCMPISTRM128REG:
10648 return EmitPCMP(MI, BB, 3, false /* in-mem */);
10649 case X86::PCMPISTRM128MEM:
10650 case X86::VPCMPISTRM128MEM:
10651 return EmitPCMP(MI, BB, 3, true /* in-mem */);
10652 case X86::PCMPESTRM128REG:
10653 case X86::VPCMPESTRM128REG:
10654 return EmitPCMP(MI, BB, 5, false /* in mem */);
10655 case X86::PCMPESTRM128MEM:
10656 case X86::VPCMPESTRM128MEM:
10657 return EmitPCMP(MI, BB, 5, true /* in mem */);
10659 // Thread synchronization.
10661 return EmitMonitor(MI, BB);
10663 return EmitMwait(MI, BB);
10665 // Atomic Lowering.
10666 case X86::ATOMAND32:
10667 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND32rr,
10668 X86::AND32ri, X86::MOV32rm,
10670 X86::NOT32r, X86::EAX,
10671 X86::GR32RegisterClass);
10672 case X86::ATOMOR32:
10673 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR32rr,
10674 X86::OR32ri, X86::MOV32rm,
10676 X86::NOT32r, X86::EAX,
10677 X86::GR32RegisterClass);
10678 case X86::ATOMXOR32:
10679 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR32rr,
10680 X86::XOR32ri, X86::MOV32rm,
10682 X86::NOT32r, X86::EAX,
10683 X86::GR32RegisterClass);
10684 case X86::ATOMNAND32:
10685 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND32rr,
10686 X86::AND32ri, X86::MOV32rm,
10688 X86::NOT32r, X86::EAX,
10689 X86::GR32RegisterClass, true);
10690 case X86::ATOMMIN32:
10691 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL32rr);
10692 case X86::ATOMMAX32:
10693 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG32rr);
10694 case X86::ATOMUMIN32:
10695 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB32rr);
10696 case X86::ATOMUMAX32:
10697 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA32rr);
10699 case X86::ATOMAND16:
10700 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND16rr,
10701 X86::AND16ri, X86::MOV16rm,
10703 X86::NOT16r, X86::AX,
10704 X86::GR16RegisterClass);
10705 case X86::ATOMOR16:
10706 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR16rr,
10707 X86::OR16ri, X86::MOV16rm,
10709 X86::NOT16r, X86::AX,
10710 X86::GR16RegisterClass);
10711 case X86::ATOMXOR16:
10712 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR16rr,
10713 X86::XOR16ri, X86::MOV16rm,
10715 X86::NOT16r, X86::AX,
10716 X86::GR16RegisterClass);
10717 case X86::ATOMNAND16:
10718 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND16rr,
10719 X86::AND16ri, X86::MOV16rm,
10721 X86::NOT16r, X86::AX,
10722 X86::GR16RegisterClass, true);
10723 case X86::ATOMMIN16:
10724 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL16rr);
10725 case X86::ATOMMAX16:
10726 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG16rr);
10727 case X86::ATOMUMIN16:
10728 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB16rr);
10729 case X86::ATOMUMAX16:
10730 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA16rr);
10732 case X86::ATOMAND8:
10733 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND8rr,
10734 X86::AND8ri, X86::MOV8rm,
10736 X86::NOT8r, X86::AL,
10737 X86::GR8RegisterClass);
10739 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR8rr,
10740 X86::OR8ri, X86::MOV8rm,
10742 X86::NOT8r, X86::AL,
10743 X86::GR8RegisterClass);
10744 case X86::ATOMXOR8:
10745 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR8rr,
10746 X86::XOR8ri, X86::MOV8rm,
10748 X86::NOT8r, X86::AL,
10749 X86::GR8RegisterClass);
10750 case X86::ATOMNAND8:
10751 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND8rr,
10752 X86::AND8ri, X86::MOV8rm,
10754 X86::NOT8r, X86::AL,
10755 X86::GR8RegisterClass, true);
10756 // FIXME: There are no CMOV8 instructions; MIN/MAX need some other way.
10757 // This group is for 64-bit host.
10758 case X86::ATOMAND64:
10759 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND64rr,
10760 X86::AND64ri32, X86::MOV64rm,
10762 X86::NOT64r, X86::RAX,
10763 X86::GR64RegisterClass);
10764 case X86::ATOMOR64:
10765 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR64rr,
10766 X86::OR64ri32, X86::MOV64rm,
10768 X86::NOT64r, X86::RAX,
10769 X86::GR64RegisterClass);
10770 case X86::ATOMXOR64:
10771 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR64rr,
10772 X86::XOR64ri32, X86::MOV64rm,
10774 X86::NOT64r, X86::RAX,
10775 X86::GR64RegisterClass);
10776 case X86::ATOMNAND64:
10777 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND64rr,
10778 X86::AND64ri32, X86::MOV64rm,
10780 X86::NOT64r, X86::RAX,
10781 X86::GR64RegisterClass, true);
10782 case X86::ATOMMIN64:
10783 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL64rr);
10784 case X86::ATOMMAX64:
10785 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG64rr);
10786 case X86::ATOMUMIN64:
10787 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB64rr);
10788 case X86::ATOMUMAX64:
10789 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA64rr);
10791 // This group does 64-bit operations on a 32-bit host.
10792 case X86::ATOMAND6432:
10793 return EmitAtomicBit6432WithCustomInserter(MI, BB,
10794 X86::AND32rr, X86::AND32rr,
10795 X86::AND32ri, X86::AND32ri,
10797 case X86::ATOMOR6432:
10798 return EmitAtomicBit6432WithCustomInserter(MI, BB,
10799 X86::OR32rr, X86::OR32rr,
10800 X86::OR32ri, X86::OR32ri,
10802 case X86::ATOMXOR6432:
10803 return EmitAtomicBit6432WithCustomInserter(MI, BB,
10804 X86::XOR32rr, X86::XOR32rr,
10805 X86::XOR32ri, X86::XOR32ri,
10807 case X86::ATOMNAND6432:
10808 return EmitAtomicBit6432WithCustomInserter(MI, BB,
10809 X86::AND32rr, X86::AND32rr,
10810 X86::AND32ri, X86::AND32ri,
10812 case X86::ATOMADD6432:
10813 return EmitAtomicBit6432WithCustomInserter(MI, BB,
10814 X86::ADD32rr, X86::ADC32rr,
10815 X86::ADD32ri, X86::ADC32ri,
10817 case X86::ATOMSUB6432:
10818 return EmitAtomicBit6432WithCustomInserter(MI, BB,
10819 X86::SUB32rr, X86::SBB32rr,
10820 X86::SUB32ri, X86::SBB32ri,
10822 case X86::ATOMSWAP6432:
10823 return EmitAtomicBit6432WithCustomInserter(MI, BB,
10824 X86::MOV32rr, X86::MOV32rr,
10825 X86::MOV32ri, X86::MOV32ri,
10827 case X86::VASTART_SAVE_XMM_REGS:
10828 return EmitVAStartSaveXMMRegsWithCustomInserter(MI, BB);
10830 case X86::VAARG_64:
10831 return EmitVAARG64WithCustomInserter(MI, BB);
10835 //===----------------------------------------------------------------------===//
10836 // X86 Optimization Hooks
10837 //===----------------------------------------------------------------------===//
10839 void X86TargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
10843 const SelectionDAG &DAG,
10844 unsigned Depth) const {
10845 unsigned Opc = Op.getOpcode();
10846 assert((Opc >= ISD::BUILTIN_OP_END ||
10847 Opc == ISD::INTRINSIC_WO_CHAIN ||
10848 Opc == ISD::INTRINSIC_W_CHAIN ||
10849 Opc == ISD::INTRINSIC_VOID) &&
10850 "Should use MaskedValueIsZero if you don't know whether Op"
10851 " is a target node!");
10853 KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0); // Don't know anything.
10867 // These nodes' second result is a boolean.
10868 if (Op.getResNo() == 0)
10871 case X86ISD::SETCC:
10872 KnownZero |= APInt::getHighBitsSet(Mask.getBitWidth(),
10873 Mask.getBitWidth() - 1);
10878 unsigned X86TargetLowering::ComputeNumSignBitsForTargetNode(SDValue Op,
10879 unsigned Depth) const {
10880 // SETCC_CARRY sets the dest to ~0 for true or 0 for false.
10881 if (Op.getOpcode() == X86ISD::SETCC_CARRY)
10882 return Op.getValueType().getScalarType().getSizeInBits();
10888 /// isGAPlusOffset - Returns true (and the GlobalValue and the offset) if the
10889 /// node is a GlobalAddress + offset.
10890 bool X86TargetLowering::isGAPlusOffset(SDNode *N,
10891 const GlobalValue* &GA,
10892 int64_t &Offset) const {
10893 if (N->getOpcode() == X86ISD::Wrapper) {
10894 if (isa<GlobalAddressSDNode>(N->getOperand(0))) {
10895 GA = cast<GlobalAddressSDNode>(N->getOperand(0))->getGlobal();
10896 Offset = cast<GlobalAddressSDNode>(N->getOperand(0))->getOffset();
10900 return TargetLowering::isGAPlusOffset(N, GA, Offset);
10903 /// PerformShuffleCombine - Combine a vector_shuffle that is equal to
10904 /// build_vector load1, load2, load3, load4, <0, 1, 2, 3> into a 128-bit load
10905 /// if the load addresses are consecutive, non-overlapping, and in the right
10907 static SDValue PerformShuffleCombine(SDNode *N, SelectionDAG &DAG,
10908 TargetLowering::DAGCombinerInfo &DCI) {
10909 DebugLoc dl = N->getDebugLoc();
10910 EVT VT = N->getValueType(0);
10912 if (VT.getSizeInBits() != 128)
10915 // Don't create instructions with illegal types after legalize types has run.
10916 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
10917 if (!DCI.isBeforeLegalize() && !TLI.isTypeLegal(VT.getVectorElementType()))
10920 SmallVector<SDValue, 16> Elts;
10921 for (unsigned i = 0, e = VT.getVectorNumElements(); i != e; ++i)
10922 Elts.push_back(getShuffleScalarElt(N, i, DAG, 0));
10924 return EltsFromConsecutiveLoads(VT, Elts, dl, DAG);
10927 /// PerformEXTRACT_VECTOR_ELTCombine - Detect vector gather/scatter index
10928 /// generation and convert it from being a bunch of shuffles and extracts
10929 /// to a simple store and scalar loads to extract the elements.
10930 static SDValue PerformEXTRACT_VECTOR_ELTCombine(SDNode *N, SelectionDAG &DAG,
10931 const TargetLowering &TLI) {
10932 SDValue InputVector = N->getOperand(0);
10934 // Only operate on vectors of 4 elements, where the alternative shuffling
10935 // gets to be more expensive.
10936 if (InputVector.getValueType() != MVT::v4i32)
10939 // Check whether every use of InputVector is an EXTRACT_VECTOR_ELT with a
10940 // single use which is a sign-extend or zero-extend, and all elements are
10942 SmallVector<SDNode *, 4> Uses;
10943 unsigned ExtractedElements = 0;
10944 for (SDNode::use_iterator UI = InputVector.getNode()->use_begin(),
10945 UE = InputVector.getNode()->use_end(); UI != UE; ++UI) {
10946 if (UI.getUse().getResNo() != InputVector.getResNo())
10949 SDNode *Extract = *UI;
10950 if (Extract->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
10953 if (Extract->getValueType(0) != MVT::i32)
10955 if (!Extract->hasOneUse())
10957 if (Extract->use_begin()->getOpcode() != ISD::SIGN_EXTEND &&
10958 Extract->use_begin()->getOpcode() != ISD::ZERO_EXTEND)
10960 if (!isa<ConstantSDNode>(Extract->getOperand(1)))
10963 // Record which element was extracted.
10964 ExtractedElements |=
10965 1 << cast<ConstantSDNode>(Extract->getOperand(1))->getZExtValue();
10967 Uses.push_back(Extract);
10970 // If not all the elements were used, this may not be worthwhile.
10971 if (ExtractedElements != 15)
10974 // Ok, we've now decided to do the transformation.
10975 DebugLoc dl = InputVector.getDebugLoc();
10977 // Store the value to a temporary stack slot.
10978 SDValue StackPtr = DAG.CreateStackTemporary(InputVector.getValueType());
10979 SDValue Ch = DAG.getStore(DAG.getEntryNode(), dl, InputVector, StackPtr,
10980 MachinePointerInfo(), false, false, 0);
10982 // Replace each use (extract) with a load of the appropriate element.
10983 for (SmallVectorImpl<SDNode *>::iterator UI = Uses.begin(),
10984 UE = Uses.end(); UI != UE; ++UI) {
10985 SDNode *Extract = *UI;
10987 // Compute the element's address.
10988 SDValue Idx = Extract->getOperand(1);
10990 InputVector.getValueType().getVectorElementType().getSizeInBits()/8;
10991 uint64_t Offset = EltSize * cast<ConstantSDNode>(Idx)->getZExtValue();
10992 SDValue OffsetVal = DAG.getConstant(Offset, TLI.getPointerTy());
10994 SDValue ScalarAddr = DAG.getNode(ISD::ADD, dl, Idx.getValueType(),
10995 StackPtr, OffsetVal);
10997 // Load the scalar.
10998 SDValue LoadScalar = DAG.getLoad(Extract->getValueType(0), dl, Ch,
10999 ScalarAddr, MachinePointerInfo(),
11002 // Replace the exact with the load.
11003 DAG.ReplaceAllUsesOfValueWith(SDValue(Extract, 0), LoadScalar);
11006 // The replacement was made in place; don't return anything.
11010 /// PerformSELECTCombine - Do target-specific dag combines on SELECT nodes.
11011 static SDValue PerformSELECTCombine(SDNode *N, SelectionDAG &DAG,
11012 const X86Subtarget *Subtarget) {
11013 DebugLoc DL = N->getDebugLoc();
11014 SDValue Cond = N->getOperand(0);
11015 // Get the LHS/RHS of the select.
11016 SDValue LHS = N->getOperand(1);
11017 SDValue RHS = N->getOperand(2);
11019 // If we have SSE[12] support, try to form min/max nodes. SSE min/max
11020 // instructions match the semantics of the common C idiom x<y?x:y but not
11021 // x<=y?x:y, because of how they handle negative zero (which can be
11022 // ignored in unsafe-math mode).
11023 if (Subtarget->hasSSE2() &&
11024 (LHS.getValueType() == MVT::f32 || LHS.getValueType() == MVT::f64) &&
11025 Cond.getOpcode() == ISD::SETCC) {
11026 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
11028 unsigned Opcode = 0;
11029 // Check for x CC y ? x : y.
11030 if (DAG.isEqualTo(LHS, Cond.getOperand(0)) &&
11031 DAG.isEqualTo(RHS, Cond.getOperand(1))) {
11035 // Converting this to a min would handle NaNs incorrectly, and swapping
11036 // the operands would cause it to handle comparisons between positive
11037 // and negative zero incorrectly.
11038 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) {
11039 if (!UnsafeFPMath &&
11040 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
11042 std::swap(LHS, RHS);
11044 Opcode = X86ISD::FMIN;
11047 // Converting this to a min would handle comparisons between positive
11048 // and negative zero incorrectly.
11049 if (!UnsafeFPMath &&
11050 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS))
11052 Opcode = X86ISD::FMIN;
11055 // Converting this to a min would handle both negative zeros and NaNs
11056 // incorrectly, but we can swap the operands to fix both.
11057 std::swap(LHS, RHS);
11061 Opcode = X86ISD::FMIN;
11065 // Converting this to a max would handle comparisons between positive
11066 // and negative zero incorrectly.
11067 if (!UnsafeFPMath &&
11068 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(LHS))
11070 Opcode = X86ISD::FMAX;
11073 // Converting this to a max would handle NaNs incorrectly, and swapping
11074 // the operands would cause it to handle comparisons between positive
11075 // and negative zero incorrectly.
11076 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) {
11077 if (!UnsafeFPMath &&
11078 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
11080 std::swap(LHS, RHS);
11082 Opcode = X86ISD::FMAX;
11085 // Converting this to a max would handle both negative zeros and NaNs
11086 // incorrectly, but we can swap the operands to fix both.
11087 std::swap(LHS, RHS);
11091 Opcode = X86ISD::FMAX;
11094 // Check for x CC y ? y : x -- a min/max with reversed arms.
11095 } else if (DAG.isEqualTo(LHS, Cond.getOperand(1)) &&
11096 DAG.isEqualTo(RHS, Cond.getOperand(0))) {
11100 // Converting this to a min would handle comparisons between positive
11101 // and negative zero incorrectly, and swapping the operands would
11102 // cause it to handle NaNs incorrectly.
11103 if (!UnsafeFPMath &&
11104 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS))) {
11105 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
11107 std::swap(LHS, RHS);
11109 Opcode = X86ISD::FMIN;
11112 // Converting this to a min would handle NaNs incorrectly.
11113 if (!UnsafeFPMath &&
11114 (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)))
11116 Opcode = X86ISD::FMIN;
11119 // Converting this to a min would handle both negative zeros and NaNs
11120 // incorrectly, but we can swap the operands to fix both.
11121 std::swap(LHS, RHS);
11125 Opcode = X86ISD::FMIN;
11129 // Converting this to a max would handle NaNs incorrectly.
11130 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
11132 Opcode = X86ISD::FMAX;
11135 // Converting this to a max would handle comparisons between positive
11136 // and negative zero incorrectly, and swapping the operands would
11137 // cause it to handle NaNs incorrectly.
11138 if (!UnsafeFPMath &&
11139 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS)) {
11140 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
11142 std::swap(LHS, RHS);
11144 Opcode = X86ISD::FMAX;
11147 // Converting this to a max would handle both negative zeros and NaNs
11148 // incorrectly, but we can swap the operands to fix both.
11149 std::swap(LHS, RHS);
11153 Opcode = X86ISD::FMAX;
11159 return DAG.getNode(Opcode, DL, N->getValueType(0), LHS, RHS);
11162 // If this is a select between two integer constants, try to do some
11164 if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(LHS)) {
11165 if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(RHS))
11166 // Don't do this for crazy integer types.
11167 if (DAG.getTargetLoweringInfo().isTypeLegal(LHS.getValueType())) {
11168 // If this is efficiently invertible, canonicalize the LHSC/RHSC values
11169 // so that TrueC (the true value) is larger than FalseC.
11170 bool NeedsCondInvert = false;
11172 if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue()) &&
11173 // Efficiently invertible.
11174 (Cond.getOpcode() == ISD::SETCC || // setcc -> invertible.
11175 (Cond.getOpcode() == ISD::XOR && // xor(X, C) -> invertible.
11176 isa<ConstantSDNode>(Cond.getOperand(1))))) {
11177 NeedsCondInvert = true;
11178 std::swap(TrueC, FalseC);
11181 // Optimize C ? 8 : 0 -> zext(C) << 3. Likewise for any pow2/0.
11182 if (FalseC->getAPIntValue() == 0 &&
11183 TrueC->getAPIntValue().isPowerOf2()) {
11184 if (NeedsCondInvert) // Invert the condition if needed.
11185 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
11186 DAG.getConstant(1, Cond.getValueType()));
11188 // Zero extend the condition if needed.
11189 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, LHS.getValueType(), Cond);
11191 unsigned ShAmt = TrueC->getAPIntValue().logBase2();
11192 return DAG.getNode(ISD::SHL, DL, LHS.getValueType(), Cond,
11193 DAG.getConstant(ShAmt, MVT::i8));
11196 // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst.
11197 if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) {
11198 if (NeedsCondInvert) // Invert the condition if needed.
11199 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
11200 DAG.getConstant(1, Cond.getValueType()));
11202 // Zero extend the condition if needed.
11203 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL,
11204 FalseC->getValueType(0), Cond);
11205 return DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
11206 SDValue(FalseC, 0));
11209 // Optimize cases that will turn into an LEA instruction. This requires
11210 // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9).
11211 if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) {
11212 uint64_t Diff = TrueC->getZExtValue()-FalseC->getZExtValue();
11213 if (N->getValueType(0) == MVT::i32) Diff = (unsigned)Diff;
11215 bool isFastMultiplier = false;
11217 switch ((unsigned char)Diff) {
11219 case 1: // result = add base, cond
11220 case 2: // result = lea base( , cond*2)
11221 case 3: // result = lea base(cond, cond*2)
11222 case 4: // result = lea base( , cond*4)
11223 case 5: // result = lea base(cond, cond*4)
11224 case 8: // result = lea base( , cond*8)
11225 case 9: // result = lea base(cond, cond*8)
11226 isFastMultiplier = true;
11231 if (isFastMultiplier) {
11232 APInt Diff = TrueC->getAPIntValue()-FalseC->getAPIntValue();
11233 if (NeedsCondInvert) // Invert the condition if needed.
11234 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
11235 DAG.getConstant(1, Cond.getValueType()));
11237 // Zero extend the condition if needed.
11238 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0),
11240 // Scale the condition by the difference.
11242 Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond,
11243 DAG.getConstant(Diff, Cond.getValueType()));
11245 // Add the base if non-zero.
11246 if (FalseC->getAPIntValue() != 0)
11247 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
11248 SDValue(FalseC, 0));
11258 /// Optimize X86ISD::CMOV [LHS, RHS, CONDCODE (e.g. X86::COND_NE), CONDVAL]
11259 static SDValue PerformCMOVCombine(SDNode *N, SelectionDAG &DAG,
11260 TargetLowering::DAGCombinerInfo &DCI) {
11261 DebugLoc DL = N->getDebugLoc();
11263 // If the flag operand isn't dead, don't touch this CMOV.
11264 if (N->getNumValues() == 2 && !SDValue(N, 1).use_empty())
11267 // If this is a select between two integer constants, try to do some
11268 // optimizations. Note that the operands are ordered the opposite of SELECT
11270 if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(N->getOperand(1))) {
11271 if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(N->getOperand(0))) {
11272 // Canonicalize the TrueC/FalseC values so that TrueC (the true value) is
11273 // larger than FalseC (the false value).
11274 X86::CondCode CC = (X86::CondCode)N->getConstantOperandVal(2);
11276 if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue())) {
11277 CC = X86::GetOppositeBranchCondition(CC);
11278 std::swap(TrueC, FalseC);
11281 // Optimize C ? 8 : 0 -> zext(setcc(C)) << 3. Likewise for any pow2/0.
11282 // This is efficient for any integer data type (including i8/i16) and
11284 if (FalseC->getAPIntValue() == 0 && TrueC->getAPIntValue().isPowerOf2()) {
11285 SDValue Cond = N->getOperand(3);
11286 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
11287 DAG.getConstant(CC, MVT::i8), Cond);
11289 // Zero extend the condition if needed.
11290 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, TrueC->getValueType(0), Cond);
11292 unsigned ShAmt = TrueC->getAPIntValue().logBase2();
11293 Cond = DAG.getNode(ISD::SHL, DL, Cond.getValueType(), Cond,
11294 DAG.getConstant(ShAmt, MVT::i8));
11295 if (N->getNumValues() == 2) // Dead flag value?
11296 return DCI.CombineTo(N, Cond, SDValue());
11300 // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst. This is efficient
11301 // for any integer data type, including i8/i16.
11302 if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) {
11303 SDValue Cond = N->getOperand(3);
11304 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
11305 DAG.getConstant(CC, MVT::i8), Cond);
11307 // Zero extend the condition if needed.
11308 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL,
11309 FalseC->getValueType(0), Cond);
11310 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
11311 SDValue(FalseC, 0));
11313 if (N->getNumValues() == 2) // Dead flag value?
11314 return DCI.CombineTo(N, Cond, SDValue());
11318 // Optimize cases that will turn into an LEA instruction. This requires
11319 // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9).
11320 if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) {
11321 uint64_t Diff = TrueC->getZExtValue()-FalseC->getZExtValue();
11322 if (N->getValueType(0) == MVT::i32) Diff = (unsigned)Diff;
11324 bool isFastMultiplier = false;
11326 switch ((unsigned char)Diff) {
11328 case 1: // result = add base, cond
11329 case 2: // result = lea base( , cond*2)
11330 case 3: // result = lea base(cond, cond*2)
11331 case 4: // result = lea base( , cond*4)
11332 case 5: // result = lea base(cond, cond*4)
11333 case 8: // result = lea base( , cond*8)
11334 case 9: // result = lea base(cond, cond*8)
11335 isFastMultiplier = true;
11340 if (isFastMultiplier) {
11341 APInt Diff = TrueC->getAPIntValue()-FalseC->getAPIntValue();
11342 SDValue Cond = N->getOperand(3);
11343 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
11344 DAG.getConstant(CC, MVT::i8), Cond);
11345 // Zero extend the condition if needed.
11346 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0),
11348 // Scale the condition by the difference.
11350 Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond,
11351 DAG.getConstant(Diff, Cond.getValueType()));
11353 // Add the base if non-zero.
11354 if (FalseC->getAPIntValue() != 0)
11355 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
11356 SDValue(FalseC, 0));
11357 if (N->getNumValues() == 2) // Dead flag value?
11358 return DCI.CombineTo(N, Cond, SDValue());
11368 /// PerformMulCombine - Optimize a single multiply with constant into two
11369 /// in order to implement it with two cheaper instructions, e.g.
11370 /// LEA + SHL, LEA + LEA.
11371 static SDValue PerformMulCombine(SDNode *N, SelectionDAG &DAG,
11372 TargetLowering::DAGCombinerInfo &DCI) {
11373 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
11376 EVT VT = N->getValueType(0);
11377 if (VT != MVT::i64)
11380 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1));
11383 uint64_t MulAmt = C->getZExtValue();
11384 if (isPowerOf2_64(MulAmt) || MulAmt == 3 || MulAmt == 5 || MulAmt == 9)
11387 uint64_t MulAmt1 = 0;
11388 uint64_t MulAmt2 = 0;
11389 if ((MulAmt % 9) == 0) {
11391 MulAmt2 = MulAmt / 9;
11392 } else if ((MulAmt % 5) == 0) {
11394 MulAmt2 = MulAmt / 5;
11395 } else if ((MulAmt % 3) == 0) {
11397 MulAmt2 = MulAmt / 3;
11400 (isPowerOf2_64(MulAmt2) || MulAmt2 == 3 || MulAmt2 == 5 || MulAmt2 == 9)){
11401 DebugLoc DL = N->getDebugLoc();
11403 if (isPowerOf2_64(MulAmt2) &&
11404 !(N->hasOneUse() && N->use_begin()->getOpcode() == ISD::ADD))
11405 // If second multiplifer is pow2, issue it first. We want the multiply by
11406 // 3, 5, or 9 to be folded into the addressing mode unless the lone use
11408 std::swap(MulAmt1, MulAmt2);
11411 if (isPowerOf2_64(MulAmt1))
11412 NewMul = DAG.getNode(ISD::SHL, DL, VT, N->getOperand(0),
11413 DAG.getConstant(Log2_64(MulAmt1), MVT::i8));
11415 NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, N->getOperand(0),
11416 DAG.getConstant(MulAmt1, VT));
11418 if (isPowerOf2_64(MulAmt2))
11419 NewMul = DAG.getNode(ISD::SHL, DL, VT, NewMul,
11420 DAG.getConstant(Log2_64(MulAmt2), MVT::i8));
11422 NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, NewMul,
11423 DAG.getConstant(MulAmt2, VT));
11425 // Do not add new nodes to DAG combiner worklist.
11426 DCI.CombineTo(N, NewMul, false);
11431 static SDValue PerformSHLCombine(SDNode *N, SelectionDAG &DAG) {
11432 SDValue N0 = N->getOperand(0);
11433 SDValue N1 = N->getOperand(1);
11434 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
11435 EVT VT = N0.getValueType();
11437 // fold (shl (and (setcc_c), c1), c2) -> (and setcc_c, (c1 << c2))
11438 // since the result of setcc_c is all zero's or all ones.
11439 if (N1C && N0.getOpcode() == ISD::AND &&
11440 N0.getOperand(1).getOpcode() == ISD::Constant) {
11441 SDValue N00 = N0.getOperand(0);
11442 if (N00.getOpcode() == X86ISD::SETCC_CARRY ||
11443 ((N00.getOpcode() == ISD::ANY_EXTEND ||
11444 N00.getOpcode() == ISD::ZERO_EXTEND) &&
11445 N00.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY)) {
11446 APInt Mask = cast<ConstantSDNode>(N0.getOperand(1))->getAPIntValue();
11447 APInt ShAmt = N1C->getAPIntValue();
11448 Mask = Mask.shl(ShAmt);
11450 return DAG.getNode(ISD::AND, N->getDebugLoc(), VT,
11451 N00, DAG.getConstant(Mask, VT));
11458 /// PerformShiftCombine - Transforms vector shift nodes to use vector shifts
11460 static SDValue PerformShiftCombine(SDNode* N, SelectionDAG &DAG,
11461 const X86Subtarget *Subtarget) {
11462 EVT VT = N->getValueType(0);
11463 if (!VT.isVector() && VT.isInteger() &&
11464 N->getOpcode() == ISD::SHL)
11465 return PerformSHLCombine(N, DAG);
11467 // On X86 with SSE2 support, we can transform this to a vector shift if
11468 // all elements are shifted by the same amount. We can't do this in legalize
11469 // because the a constant vector is typically transformed to a constant pool
11470 // so we have no knowledge of the shift amount.
11471 if (!Subtarget->hasSSE2())
11474 if (VT != MVT::v2i64 && VT != MVT::v4i32 && VT != MVT::v8i16)
11477 SDValue ShAmtOp = N->getOperand(1);
11478 EVT EltVT = VT.getVectorElementType();
11479 DebugLoc DL = N->getDebugLoc();
11480 SDValue BaseShAmt = SDValue();
11481 if (ShAmtOp.getOpcode() == ISD::BUILD_VECTOR) {
11482 unsigned NumElts = VT.getVectorNumElements();
11484 for (; i != NumElts; ++i) {
11485 SDValue Arg = ShAmtOp.getOperand(i);
11486 if (Arg.getOpcode() == ISD::UNDEF) continue;
11490 for (; i != NumElts; ++i) {
11491 SDValue Arg = ShAmtOp.getOperand(i);
11492 if (Arg.getOpcode() == ISD::UNDEF) continue;
11493 if (Arg != BaseShAmt) {
11497 } else if (ShAmtOp.getOpcode() == ISD::VECTOR_SHUFFLE &&
11498 cast<ShuffleVectorSDNode>(ShAmtOp)->isSplat()) {
11499 SDValue InVec = ShAmtOp.getOperand(0);
11500 if (InVec.getOpcode() == ISD::BUILD_VECTOR) {
11501 unsigned NumElts = InVec.getValueType().getVectorNumElements();
11503 for (; i != NumElts; ++i) {
11504 SDValue Arg = InVec.getOperand(i);
11505 if (Arg.getOpcode() == ISD::UNDEF) continue;
11509 } else if (InVec.getOpcode() == ISD::INSERT_VECTOR_ELT) {
11510 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(InVec.getOperand(2))) {
11511 unsigned SplatIdx= cast<ShuffleVectorSDNode>(ShAmtOp)->getSplatIndex();
11512 if (C->getZExtValue() == SplatIdx)
11513 BaseShAmt = InVec.getOperand(1);
11516 if (BaseShAmt.getNode() == 0)
11517 BaseShAmt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, EltVT, ShAmtOp,
11518 DAG.getIntPtrConstant(0));
11522 // The shift amount is an i32.
11523 if (EltVT.bitsGT(MVT::i32))
11524 BaseShAmt = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, BaseShAmt);
11525 else if (EltVT.bitsLT(MVT::i32))
11526 BaseShAmt = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i32, BaseShAmt);
11528 // The shift amount is identical so we can do a vector shift.
11529 SDValue ValOp = N->getOperand(0);
11530 switch (N->getOpcode()) {
11532 llvm_unreachable("Unknown shift opcode!");
11535 if (VT == MVT::v2i64)
11536 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
11537 DAG.getConstant(Intrinsic::x86_sse2_pslli_q, MVT::i32),
11539 if (VT == MVT::v4i32)
11540 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
11541 DAG.getConstant(Intrinsic::x86_sse2_pslli_d, MVT::i32),
11543 if (VT == MVT::v8i16)
11544 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
11545 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32),
11549 if (VT == MVT::v4i32)
11550 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
11551 DAG.getConstant(Intrinsic::x86_sse2_psrai_d, MVT::i32),
11553 if (VT == MVT::v8i16)
11554 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
11555 DAG.getConstant(Intrinsic::x86_sse2_psrai_w, MVT::i32),
11559 if (VT == MVT::v2i64)
11560 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
11561 DAG.getConstant(Intrinsic::x86_sse2_psrli_q, MVT::i32),
11563 if (VT == MVT::v4i32)
11564 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
11565 DAG.getConstant(Intrinsic::x86_sse2_psrli_d, MVT::i32),
11567 if (VT == MVT::v8i16)
11568 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
11569 DAG.getConstant(Intrinsic::x86_sse2_psrli_w, MVT::i32),
11577 static SDValue PerformAndCombine(SDNode *N, SelectionDAG &DAG,
11578 TargetLowering::DAGCombinerInfo &DCI,
11579 const X86Subtarget *Subtarget) {
11580 if (DCI.isBeforeLegalizeOps())
11583 // Want to form PANDN nodes, in the hopes of then easily combining them with
11584 // OR and AND nodes to form PBLEND/PSIGN.
11585 EVT VT = N->getValueType(0);
11586 if (VT != MVT::v2i64)
11589 SDValue N0 = N->getOperand(0);
11590 SDValue N1 = N->getOperand(1);
11591 DebugLoc DL = N->getDebugLoc();
11593 // Check LHS for vnot
11594 if (N0.getOpcode() == ISD::XOR &&
11595 ISD::isBuildVectorAllOnes(N0.getOperand(1).getNode()))
11596 return DAG.getNode(X86ISD::PANDN, DL, VT, N0.getOperand(0), N1);
11598 // Check RHS for vnot
11599 if (N1.getOpcode() == ISD::XOR &&
11600 ISD::isBuildVectorAllOnes(N1.getOperand(1).getNode()))
11601 return DAG.getNode(X86ISD::PANDN, DL, VT, N1.getOperand(0), N0);
11606 static SDValue PerformOrCombine(SDNode *N, SelectionDAG &DAG,
11607 TargetLowering::DAGCombinerInfo &DCI,
11608 const X86Subtarget *Subtarget) {
11609 if (DCI.isBeforeLegalizeOps())
11612 EVT VT = N->getValueType(0);
11613 if (VT != MVT::i16 && VT != MVT::i32 && VT != MVT::i64 && VT != MVT::v2i64)
11616 SDValue N0 = N->getOperand(0);
11617 SDValue N1 = N->getOperand(1);
11619 // look for psign/blend
11620 if (Subtarget->hasSSSE3()) {
11621 if (VT == MVT::v2i64) {
11622 // Canonicalize pandn to RHS
11623 if (N0.getOpcode() == X86ISD::PANDN)
11625 // or (and (m, x), (pandn m, y))
11626 if (N0.getOpcode() == ISD::AND && N1.getOpcode() == X86ISD::PANDN) {
11627 SDValue Mask = N1.getOperand(0);
11628 SDValue X = N1.getOperand(1);
11630 if (N0.getOperand(0) == Mask)
11631 Y = N0.getOperand(1);
11632 if (N0.getOperand(1) == Mask)
11633 Y = N0.getOperand(0);
11635 // Check to see if the mask appeared in both the AND and PANDN and
11639 // Validate that X, Y, and Mask are BIT_CONVERTS, and see through them.
11640 if (Mask.getOpcode() != ISD::BITCAST ||
11641 X.getOpcode() != ISD::BITCAST ||
11642 Y.getOpcode() != ISD::BITCAST)
11645 // Look through mask bitcast.
11646 Mask = Mask.getOperand(0);
11647 EVT MaskVT = Mask.getValueType();
11649 // Validate that the Mask operand is a vector sra node. The sra node
11650 // will be an intrinsic.
11651 if (Mask.getOpcode() != ISD::INTRINSIC_WO_CHAIN)
11654 // FIXME: what to do for bytes, since there is a psignb/pblendvb, but
11655 // there is no psrai.b
11656 switch (cast<ConstantSDNode>(Mask.getOperand(0))->getZExtValue()) {
11657 case Intrinsic::x86_sse2_psrai_w:
11658 case Intrinsic::x86_sse2_psrai_d:
11660 default: return SDValue();
11663 // Check that the SRA is all signbits.
11664 SDValue SraC = Mask.getOperand(2);
11665 unsigned SraAmt = cast<ConstantSDNode>(SraC)->getZExtValue();
11666 unsigned EltBits = MaskVT.getVectorElementType().getSizeInBits();
11667 if ((SraAmt + 1) != EltBits)
11670 DebugLoc DL = N->getDebugLoc();
11672 // Now we know we at least have a plendvb with the mask val. See if
11673 // we can form a psignb/w/d.
11674 // psign = x.type == y.type == mask.type && y = sub(0, x);
11675 X = X.getOperand(0);
11676 Y = Y.getOperand(0);
11677 if (Y.getOpcode() == ISD::SUB && Y.getOperand(1) == X &&
11678 ISD::isBuildVectorAllZeros(Y.getOperand(0).getNode()) &&
11679 X.getValueType() == MaskVT && X.getValueType() == Y.getValueType()){
11682 case 8: Opc = X86ISD::PSIGNB; break;
11683 case 16: Opc = X86ISD::PSIGNW; break;
11684 case 32: Opc = X86ISD::PSIGND; break;
11688 SDValue Sign = DAG.getNode(Opc, DL, MaskVT, X, Mask.getOperand(1));
11689 return DAG.getNode(ISD::BITCAST, DL, MVT::v2i64, Sign);
11692 // PBLENDVB only available on SSE 4.1
11693 if (!Subtarget->hasSSE41())
11696 X = DAG.getNode(ISD::BITCAST, DL, MVT::v16i8, X);
11697 Y = DAG.getNode(ISD::BITCAST, DL, MVT::v16i8, Y);
11698 Mask = DAG.getNode(ISD::BITCAST, DL, MVT::v16i8, Mask);
11699 Mask = DAG.getNode(X86ISD::PBLENDVB, DL, MVT::v16i8, X, Y, Mask);
11700 return DAG.getNode(ISD::BITCAST, DL, MVT::v2i64, Mask);
11705 // fold (or (x << c) | (y >> (64 - c))) ==> (shld64 x, y, c)
11706 if (N0.getOpcode() == ISD::SRL && N1.getOpcode() == ISD::SHL)
11708 if (N0.getOpcode() != ISD::SHL || N1.getOpcode() != ISD::SRL)
11710 if (!N0.hasOneUse() || !N1.hasOneUse())
11713 SDValue ShAmt0 = N0.getOperand(1);
11714 if (ShAmt0.getValueType() != MVT::i8)
11716 SDValue ShAmt1 = N1.getOperand(1);
11717 if (ShAmt1.getValueType() != MVT::i8)
11719 if (ShAmt0.getOpcode() == ISD::TRUNCATE)
11720 ShAmt0 = ShAmt0.getOperand(0);
11721 if (ShAmt1.getOpcode() == ISD::TRUNCATE)
11722 ShAmt1 = ShAmt1.getOperand(0);
11724 DebugLoc DL = N->getDebugLoc();
11725 unsigned Opc = X86ISD::SHLD;
11726 SDValue Op0 = N0.getOperand(0);
11727 SDValue Op1 = N1.getOperand(0);
11728 if (ShAmt0.getOpcode() == ISD::SUB) {
11729 Opc = X86ISD::SHRD;
11730 std::swap(Op0, Op1);
11731 std::swap(ShAmt0, ShAmt1);
11734 unsigned Bits = VT.getSizeInBits();
11735 if (ShAmt1.getOpcode() == ISD::SUB) {
11736 SDValue Sum = ShAmt1.getOperand(0);
11737 if (ConstantSDNode *SumC = dyn_cast<ConstantSDNode>(Sum)) {
11738 SDValue ShAmt1Op1 = ShAmt1.getOperand(1);
11739 if (ShAmt1Op1.getNode()->getOpcode() == ISD::TRUNCATE)
11740 ShAmt1Op1 = ShAmt1Op1.getOperand(0);
11741 if (SumC->getSExtValue() == Bits && ShAmt1Op1 == ShAmt0)
11742 return DAG.getNode(Opc, DL, VT,
11744 DAG.getNode(ISD::TRUNCATE, DL,
11747 } else if (ConstantSDNode *ShAmt1C = dyn_cast<ConstantSDNode>(ShAmt1)) {
11748 ConstantSDNode *ShAmt0C = dyn_cast<ConstantSDNode>(ShAmt0);
11750 ShAmt0C->getSExtValue() + ShAmt1C->getSExtValue() == Bits)
11751 return DAG.getNode(Opc, DL, VT,
11752 N0.getOperand(0), N1.getOperand(0),
11753 DAG.getNode(ISD::TRUNCATE, DL,
11760 /// PerformSTORECombine - Do target-specific dag combines on STORE nodes.
11761 static SDValue PerformSTORECombine(SDNode *N, SelectionDAG &DAG,
11762 const X86Subtarget *Subtarget) {
11763 // Turn load->store of MMX types into GPR load/stores. This avoids clobbering
11764 // the FP state in cases where an emms may be missing.
11765 // A preferable solution to the general problem is to figure out the right
11766 // places to insert EMMS. This qualifies as a quick hack.
11768 // Similarly, turn load->store of i64 into double load/stores in 32-bit mode.
11769 StoreSDNode *St = cast<StoreSDNode>(N);
11770 EVT VT = St->getValue().getValueType();
11771 if (VT.getSizeInBits() != 64)
11774 const Function *F = DAG.getMachineFunction().getFunction();
11775 bool NoImplicitFloatOps = F->hasFnAttr(Attribute::NoImplicitFloat);
11776 bool F64IsLegal = !UseSoftFloat && !NoImplicitFloatOps
11777 && Subtarget->hasSSE2();
11778 if ((VT.isVector() ||
11779 (VT == MVT::i64 && F64IsLegal && !Subtarget->is64Bit())) &&
11780 isa<LoadSDNode>(St->getValue()) &&
11781 !cast<LoadSDNode>(St->getValue())->isVolatile() &&
11782 St->getChain().hasOneUse() && !St->isVolatile()) {
11783 SDNode* LdVal = St->getValue().getNode();
11784 LoadSDNode *Ld = 0;
11785 int TokenFactorIndex = -1;
11786 SmallVector<SDValue, 8> Ops;
11787 SDNode* ChainVal = St->getChain().getNode();
11788 // Must be a store of a load. We currently handle two cases: the load
11789 // is a direct child, and it's under an intervening TokenFactor. It is
11790 // possible to dig deeper under nested TokenFactors.
11791 if (ChainVal == LdVal)
11792 Ld = cast<LoadSDNode>(St->getChain());
11793 else if (St->getValue().hasOneUse() &&
11794 ChainVal->getOpcode() == ISD::TokenFactor) {
11795 for (unsigned i=0, e = ChainVal->getNumOperands(); i != e; ++i) {
11796 if (ChainVal->getOperand(i).getNode() == LdVal) {
11797 TokenFactorIndex = i;
11798 Ld = cast<LoadSDNode>(St->getValue());
11800 Ops.push_back(ChainVal->getOperand(i));
11804 if (!Ld || !ISD::isNormalLoad(Ld))
11807 // If this is not the MMX case, i.e. we are just turning i64 load/store
11808 // into f64 load/store, avoid the transformation if there are multiple
11809 // uses of the loaded value.
11810 if (!VT.isVector() && !Ld->hasNUsesOfValue(1, 0))
11813 DebugLoc LdDL = Ld->getDebugLoc();
11814 DebugLoc StDL = N->getDebugLoc();
11815 // If we are a 64-bit capable x86, lower to a single movq load/store pair.
11816 // Otherwise, if it's legal to use f64 SSE instructions, use f64 load/store
11818 if (Subtarget->is64Bit() || F64IsLegal) {
11819 EVT LdVT = Subtarget->is64Bit() ? MVT::i64 : MVT::f64;
11820 SDValue NewLd = DAG.getLoad(LdVT, LdDL, Ld->getChain(), Ld->getBasePtr(),
11821 Ld->getPointerInfo(), Ld->isVolatile(),
11822 Ld->isNonTemporal(), Ld->getAlignment());
11823 SDValue NewChain = NewLd.getValue(1);
11824 if (TokenFactorIndex != -1) {
11825 Ops.push_back(NewChain);
11826 NewChain = DAG.getNode(ISD::TokenFactor, LdDL, MVT::Other, &Ops[0],
11829 return DAG.getStore(NewChain, StDL, NewLd, St->getBasePtr(),
11830 St->getPointerInfo(),
11831 St->isVolatile(), St->isNonTemporal(),
11832 St->getAlignment());
11835 // Otherwise, lower to two pairs of 32-bit loads / stores.
11836 SDValue LoAddr = Ld->getBasePtr();
11837 SDValue HiAddr = DAG.getNode(ISD::ADD, LdDL, MVT::i32, LoAddr,
11838 DAG.getConstant(4, MVT::i32));
11840 SDValue LoLd = DAG.getLoad(MVT::i32, LdDL, Ld->getChain(), LoAddr,
11841 Ld->getPointerInfo(),
11842 Ld->isVolatile(), Ld->isNonTemporal(),
11843 Ld->getAlignment());
11844 SDValue HiLd = DAG.getLoad(MVT::i32, LdDL, Ld->getChain(), HiAddr,
11845 Ld->getPointerInfo().getWithOffset(4),
11846 Ld->isVolatile(), Ld->isNonTemporal(),
11847 MinAlign(Ld->getAlignment(), 4));
11849 SDValue NewChain = LoLd.getValue(1);
11850 if (TokenFactorIndex != -1) {
11851 Ops.push_back(LoLd);
11852 Ops.push_back(HiLd);
11853 NewChain = DAG.getNode(ISD::TokenFactor, LdDL, MVT::Other, &Ops[0],
11857 LoAddr = St->getBasePtr();
11858 HiAddr = DAG.getNode(ISD::ADD, StDL, MVT::i32, LoAddr,
11859 DAG.getConstant(4, MVT::i32));
11861 SDValue LoSt = DAG.getStore(NewChain, StDL, LoLd, LoAddr,
11862 St->getPointerInfo(),
11863 St->isVolatile(), St->isNonTemporal(),
11864 St->getAlignment());
11865 SDValue HiSt = DAG.getStore(NewChain, StDL, HiLd, HiAddr,
11866 St->getPointerInfo().getWithOffset(4),
11868 St->isNonTemporal(),
11869 MinAlign(St->getAlignment(), 4));
11870 return DAG.getNode(ISD::TokenFactor, StDL, MVT::Other, LoSt, HiSt);
11875 /// PerformFORCombine - Do target-specific dag combines on X86ISD::FOR and
11876 /// X86ISD::FXOR nodes.
11877 static SDValue PerformFORCombine(SDNode *N, SelectionDAG &DAG) {
11878 assert(N->getOpcode() == X86ISD::FOR || N->getOpcode() == X86ISD::FXOR);
11879 // F[X]OR(0.0, x) -> x
11880 // F[X]OR(x, 0.0) -> x
11881 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
11882 if (C->getValueAPF().isPosZero())
11883 return N->getOperand(1);
11884 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
11885 if (C->getValueAPF().isPosZero())
11886 return N->getOperand(0);
11890 /// PerformFANDCombine - Do target-specific dag combines on X86ISD::FAND nodes.
11891 static SDValue PerformFANDCombine(SDNode *N, SelectionDAG &DAG) {
11892 // FAND(0.0, x) -> 0.0
11893 // FAND(x, 0.0) -> 0.0
11894 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
11895 if (C->getValueAPF().isPosZero())
11896 return N->getOperand(0);
11897 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
11898 if (C->getValueAPF().isPosZero())
11899 return N->getOperand(1);
11903 static SDValue PerformBTCombine(SDNode *N,
11905 TargetLowering::DAGCombinerInfo &DCI) {
11906 // BT ignores high bits in the bit index operand.
11907 SDValue Op1 = N->getOperand(1);
11908 if (Op1.hasOneUse()) {
11909 unsigned BitWidth = Op1.getValueSizeInBits();
11910 APInt DemandedMask = APInt::getLowBitsSet(BitWidth, Log2_32(BitWidth));
11911 APInt KnownZero, KnownOne;
11912 TargetLowering::TargetLoweringOpt TLO(DAG, !DCI.isBeforeLegalize(),
11913 !DCI.isBeforeLegalizeOps());
11914 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
11915 if (TLO.ShrinkDemandedConstant(Op1, DemandedMask) ||
11916 TLI.SimplifyDemandedBits(Op1, DemandedMask, KnownZero, KnownOne, TLO))
11917 DCI.CommitTargetLoweringOpt(TLO);
11922 static SDValue PerformVZEXT_MOVLCombine(SDNode *N, SelectionDAG &DAG) {
11923 SDValue Op = N->getOperand(0);
11924 if (Op.getOpcode() == ISD::BITCAST)
11925 Op = Op.getOperand(0);
11926 EVT VT = N->getValueType(0), OpVT = Op.getValueType();
11927 if (Op.getOpcode() == X86ISD::VZEXT_LOAD &&
11928 VT.getVectorElementType().getSizeInBits() ==
11929 OpVT.getVectorElementType().getSizeInBits()) {
11930 return DAG.getNode(ISD::BITCAST, N->getDebugLoc(), VT, Op);
11935 static SDValue PerformZExtCombine(SDNode *N, SelectionDAG &DAG) {
11936 // (i32 zext (and (i8 x86isd::setcc_carry), 1)) ->
11937 // (and (i32 x86isd::setcc_carry), 1)
11938 // This eliminates the zext. This transformation is necessary because
11939 // ISD::SETCC is always legalized to i8.
11940 DebugLoc dl = N->getDebugLoc();
11941 SDValue N0 = N->getOperand(0);
11942 EVT VT = N->getValueType(0);
11943 if (N0.getOpcode() == ISD::AND &&
11945 N0.getOperand(0).hasOneUse()) {
11946 SDValue N00 = N0.getOperand(0);
11947 if (N00.getOpcode() != X86ISD::SETCC_CARRY)
11949 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N0.getOperand(1));
11950 if (!C || C->getZExtValue() != 1)
11952 return DAG.getNode(ISD::AND, dl, VT,
11953 DAG.getNode(X86ISD::SETCC_CARRY, dl, VT,
11954 N00.getOperand(0), N00.getOperand(1)),
11955 DAG.getConstant(1, VT));
11961 // Optimize RES = X86ISD::SETCC CONDCODE, EFLAG_INPUT
11962 static SDValue PerformSETCCCombine(SDNode *N, SelectionDAG &DAG) {
11963 unsigned X86CC = N->getConstantOperandVal(0);
11964 SDValue EFLAG = N->getOperand(1);
11965 DebugLoc DL = N->getDebugLoc();
11967 // Materialize "setb reg" as "sbb reg,reg", since it can be extended without
11968 // a zext and produces an all-ones bit which is more useful than 0/1 in some
11970 if (X86CC == X86::COND_B)
11971 return DAG.getNode(ISD::AND, DL, MVT::i8,
11972 DAG.getNode(X86ISD::SETCC_CARRY, DL, MVT::i8,
11973 DAG.getConstant(X86CC, MVT::i8), EFLAG),
11974 DAG.getConstant(1, MVT::i8));
11979 // Optimize RES, EFLAGS = X86ISD::ADC LHS, RHS, EFLAGS
11980 static SDValue PerformADCCombine(SDNode *N, SelectionDAG &DAG,
11981 X86TargetLowering::DAGCombinerInfo &DCI) {
11982 // If the LHS and RHS of the ADC node are zero, then it can't overflow and
11983 // the result is either zero or one (depending on the input carry bit).
11984 // Strength reduce this down to a "set on carry" aka SETCC_CARRY&1.
11985 if (X86::isZeroNode(N->getOperand(0)) &&
11986 X86::isZeroNode(N->getOperand(1)) &&
11987 // We don't have a good way to replace an EFLAGS use, so only do this when
11989 SDValue(N, 1).use_empty()) {
11990 DebugLoc DL = N->getDebugLoc();
11991 EVT VT = N->getValueType(0);
11992 SDValue CarryOut = DAG.getConstant(0, N->getValueType(1));
11993 SDValue Res1 = DAG.getNode(ISD::AND, DL, VT,
11994 DAG.getNode(X86ISD::SETCC_CARRY, DL, VT,
11995 DAG.getConstant(X86::COND_B,MVT::i8),
11997 DAG.getConstant(1, VT));
11998 return DCI.CombineTo(N, Res1, CarryOut);
12004 // fold (add Y, (sete X, 0)) -> adc 0, Y
12005 // (add Y, (setne X, 0)) -> sbb -1, Y
12006 // (sub (sete X, 0), Y) -> sbb 0, Y
12007 // (sub (setne X, 0), Y) -> adc -1, Y
12008 static SDValue OptimizeConditonalInDecrement(SDNode *N, SelectionDAG &DAG) {
12009 DebugLoc DL = N->getDebugLoc();
12011 // Look through ZExts.
12012 SDValue Ext = N->getOperand(N->getOpcode() == ISD::SUB ? 1 : 0);
12013 if (Ext.getOpcode() != ISD::ZERO_EXTEND || !Ext.hasOneUse())
12016 SDValue SetCC = Ext.getOperand(0);
12017 if (SetCC.getOpcode() != X86ISD::SETCC || !SetCC.hasOneUse())
12020 X86::CondCode CC = (X86::CondCode)SetCC.getConstantOperandVal(0);
12021 if (CC != X86::COND_E && CC != X86::COND_NE)
12024 SDValue Cmp = SetCC.getOperand(1);
12025 if (Cmp.getOpcode() != X86ISD::CMP || !Cmp.hasOneUse() ||
12026 !X86::isZeroNode(Cmp.getOperand(1)) ||
12027 !Cmp.getOperand(0).getValueType().isInteger())
12030 SDValue CmpOp0 = Cmp.getOperand(0);
12031 SDValue NewCmp = DAG.getNode(X86ISD::CMP, DL, MVT::i32, CmpOp0,
12032 DAG.getConstant(1, CmpOp0.getValueType()));
12034 SDValue OtherVal = N->getOperand(N->getOpcode() == ISD::SUB ? 0 : 1);
12035 if (CC == X86::COND_NE)
12036 return DAG.getNode(N->getOpcode() == ISD::SUB ? X86ISD::ADC : X86ISD::SBB,
12037 DL, OtherVal.getValueType(), OtherVal,
12038 DAG.getConstant(-1ULL, OtherVal.getValueType()), NewCmp);
12039 return DAG.getNode(N->getOpcode() == ISD::SUB ? X86ISD::SBB : X86ISD::ADC,
12040 DL, OtherVal.getValueType(), OtherVal,
12041 DAG.getConstant(0, OtherVal.getValueType()), NewCmp);
12044 SDValue X86TargetLowering::PerformDAGCombine(SDNode *N,
12045 DAGCombinerInfo &DCI) const {
12046 SelectionDAG &DAG = DCI.DAG;
12047 switch (N->getOpcode()) {
12049 case ISD::EXTRACT_VECTOR_ELT:
12050 return PerformEXTRACT_VECTOR_ELTCombine(N, DAG, *this);
12051 case ISD::SELECT: return PerformSELECTCombine(N, DAG, Subtarget);
12052 case X86ISD::CMOV: return PerformCMOVCombine(N, DAG, DCI);
12054 case ISD::SUB: return OptimizeConditonalInDecrement(N, DAG);
12055 case X86ISD::ADC: return PerformADCCombine(N, DAG, DCI);
12056 case ISD::MUL: return PerformMulCombine(N, DAG, DCI);
12059 case ISD::SRL: return PerformShiftCombine(N, DAG, Subtarget);
12060 case ISD::AND: return PerformAndCombine(N, DAG, DCI, Subtarget);
12061 case ISD::OR: return PerformOrCombine(N, DAG, DCI, Subtarget);
12062 case ISD::STORE: return PerformSTORECombine(N, DAG, Subtarget);
12064 case X86ISD::FOR: return PerformFORCombine(N, DAG);
12065 case X86ISD::FAND: return PerformFANDCombine(N, DAG);
12066 case X86ISD::BT: return PerformBTCombine(N, DAG, DCI);
12067 case X86ISD::VZEXT_MOVL: return PerformVZEXT_MOVLCombine(N, DAG);
12068 case ISD::ZERO_EXTEND: return PerformZExtCombine(N, DAG);
12069 case X86ISD::SETCC: return PerformSETCCCombine(N, DAG);
12070 case X86ISD::SHUFPS: // Handle all target specific shuffles
12071 case X86ISD::SHUFPD:
12072 case X86ISD::PALIGN:
12073 case X86ISD::PUNPCKHBW:
12074 case X86ISD::PUNPCKHWD:
12075 case X86ISD::PUNPCKHDQ:
12076 case X86ISD::PUNPCKHQDQ:
12077 case X86ISD::UNPCKHPS:
12078 case X86ISD::UNPCKHPD:
12079 case X86ISD::PUNPCKLBW:
12080 case X86ISD::PUNPCKLWD:
12081 case X86ISD::PUNPCKLDQ:
12082 case X86ISD::PUNPCKLQDQ:
12083 case X86ISD::UNPCKLPS:
12084 case X86ISD::UNPCKLPD:
12085 case X86ISD::VUNPCKLPS:
12086 case X86ISD::VUNPCKLPD:
12087 case X86ISD::VUNPCKLPSY:
12088 case X86ISD::VUNPCKLPDY:
12089 case X86ISD::MOVHLPS:
12090 case X86ISD::MOVLHPS:
12091 case X86ISD::PSHUFD:
12092 case X86ISD::PSHUFHW:
12093 case X86ISD::PSHUFLW:
12094 case X86ISD::MOVSS:
12095 case X86ISD::MOVSD:
12096 case ISD::VECTOR_SHUFFLE: return PerformShuffleCombine(N, DAG, DCI);
12102 /// isTypeDesirableForOp - Return true if the target has native support for
12103 /// the specified value type and it is 'desirable' to use the type for the
12104 /// given node type. e.g. On x86 i16 is legal, but undesirable since i16
12105 /// instruction encodings are longer and some i16 instructions are slow.
12106 bool X86TargetLowering::isTypeDesirableForOp(unsigned Opc, EVT VT) const {
12107 if (!isTypeLegal(VT))
12109 if (VT != MVT::i16)
12116 case ISD::SIGN_EXTEND:
12117 case ISD::ZERO_EXTEND:
12118 case ISD::ANY_EXTEND:
12131 /// IsDesirableToPromoteOp - This method query the target whether it is
12132 /// beneficial for dag combiner to promote the specified node. If true, it
12133 /// should return the desired promotion type by reference.
12134 bool X86TargetLowering::IsDesirableToPromoteOp(SDValue Op, EVT &PVT) const {
12135 EVT VT = Op.getValueType();
12136 if (VT != MVT::i16)
12139 bool Promote = false;
12140 bool Commute = false;
12141 switch (Op.getOpcode()) {
12144 LoadSDNode *LD = cast<LoadSDNode>(Op);
12145 // If the non-extending load has a single use and it's not live out, then it
12146 // might be folded.
12147 if (LD->getExtensionType() == ISD::NON_EXTLOAD /*&&
12148 Op.hasOneUse()*/) {
12149 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
12150 UE = Op.getNode()->use_end(); UI != UE; ++UI) {
12151 // The only case where we'd want to promote LOAD (rather then it being
12152 // promoted as an operand is when it's only use is liveout.
12153 if (UI->getOpcode() != ISD::CopyToReg)
12160 case ISD::SIGN_EXTEND:
12161 case ISD::ZERO_EXTEND:
12162 case ISD::ANY_EXTEND:
12167 SDValue N0 = Op.getOperand(0);
12168 // Look out for (store (shl (load), x)).
12169 if (MayFoldLoad(N0) && MayFoldIntoStore(Op))
12182 SDValue N0 = Op.getOperand(0);
12183 SDValue N1 = Op.getOperand(1);
12184 if (!Commute && MayFoldLoad(N1))
12186 // Avoid disabling potential load folding opportunities.
12187 if (MayFoldLoad(N0) && (!isa<ConstantSDNode>(N1) || MayFoldIntoStore(Op)))
12189 if (MayFoldLoad(N1) && (!isa<ConstantSDNode>(N0) || MayFoldIntoStore(Op)))
12199 //===----------------------------------------------------------------------===//
12200 // X86 Inline Assembly Support
12201 //===----------------------------------------------------------------------===//
12203 bool X86TargetLowering::ExpandInlineAsm(CallInst *CI) const {
12204 InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
12206 std::string AsmStr = IA->getAsmString();
12208 // TODO: should remove alternatives from the asmstring: "foo {a|b}" -> "foo a"
12209 SmallVector<StringRef, 4> AsmPieces;
12210 SplitString(AsmStr, AsmPieces, ";\n");
12212 switch (AsmPieces.size()) {
12213 default: return false;
12215 AsmStr = AsmPieces[0];
12217 SplitString(AsmStr, AsmPieces, " \t"); // Split with whitespace.
12219 // FIXME: this should verify that we are targetting a 486 or better. If not,
12220 // we will turn this bswap into something that will be lowered to logical ops
12221 // instead of emitting the bswap asm. For now, we don't support 486 or lower
12222 // so don't worry about this.
12224 if (AsmPieces.size() == 2 &&
12225 (AsmPieces[0] == "bswap" ||
12226 AsmPieces[0] == "bswapq" ||
12227 AsmPieces[0] == "bswapl") &&
12228 (AsmPieces[1] == "$0" ||
12229 AsmPieces[1] == "${0:q}")) {
12230 // No need to check constraints, nothing other than the equivalent of
12231 // "=r,0" would be valid here.
12232 const IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
12233 if (!Ty || Ty->getBitWidth() % 16 != 0)
12235 return IntrinsicLowering::LowerToByteSwap(CI);
12237 // rorw $$8, ${0:w} --> llvm.bswap.i16
12238 if (CI->getType()->isIntegerTy(16) &&
12239 AsmPieces.size() == 3 &&
12240 (AsmPieces[0] == "rorw" || AsmPieces[0] == "rolw") &&
12241 AsmPieces[1] == "$$8," &&
12242 AsmPieces[2] == "${0:w}" &&
12243 IA->getConstraintString().compare(0, 5, "=r,0,") == 0) {
12245 const std::string &ConstraintsStr = IA->getConstraintString();
12246 SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ",");
12247 std::sort(AsmPieces.begin(), AsmPieces.end());
12248 if (AsmPieces.size() == 4 &&
12249 AsmPieces[0] == "~{cc}" &&
12250 AsmPieces[1] == "~{dirflag}" &&
12251 AsmPieces[2] == "~{flags}" &&
12252 AsmPieces[3] == "~{fpsr}") {
12253 const IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
12254 if (!Ty || Ty->getBitWidth() % 16 != 0)
12256 return IntrinsicLowering::LowerToByteSwap(CI);
12261 if (CI->getType()->isIntegerTy(32) &&
12262 IA->getConstraintString().compare(0, 5, "=r,0,") == 0) {
12263 SmallVector<StringRef, 4> Words;
12264 SplitString(AsmPieces[0], Words, " \t,");
12265 if (Words.size() == 3 && Words[0] == "rorw" && Words[1] == "$$8" &&
12266 Words[2] == "${0:w}") {
12268 SplitString(AsmPieces[1], Words, " \t,");
12269 if (Words.size() == 3 && Words[0] == "rorl" && Words[1] == "$$16" &&
12270 Words[2] == "$0") {
12272 SplitString(AsmPieces[2], Words, " \t,");
12273 if (Words.size() == 3 && Words[0] == "rorw" && Words[1] == "$$8" &&
12274 Words[2] == "${0:w}") {
12276 const std::string &ConstraintsStr = IA->getConstraintString();
12277 SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ",");
12278 std::sort(AsmPieces.begin(), AsmPieces.end());
12279 if (AsmPieces.size() == 4 &&
12280 AsmPieces[0] == "~{cc}" &&
12281 AsmPieces[1] == "~{dirflag}" &&
12282 AsmPieces[2] == "~{flags}" &&
12283 AsmPieces[3] == "~{fpsr}") {
12284 const IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
12285 if (!Ty || Ty->getBitWidth() % 16 != 0)
12287 return IntrinsicLowering::LowerToByteSwap(CI);
12294 if (CI->getType()->isIntegerTy(64)) {
12295 InlineAsm::ConstraintInfoVector Constraints = IA->ParseConstraints();
12296 if (Constraints.size() >= 2 &&
12297 Constraints[0].Codes.size() == 1 && Constraints[0].Codes[0] == "A" &&
12298 Constraints[1].Codes.size() == 1 && Constraints[1].Codes[0] == "0") {
12299 // bswap %eax / bswap %edx / xchgl %eax, %edx -> llvm.bswap.i64
12300 SmallVector<StringRef, 4> Words;
12301 SplitString(AsmPieces[0], Words, " \t");
12302 if (Words.size() == 2 && Words[0] == "bswap" && Words[1] == "%eax") {
12304 SplitString(AsmPieces[1], Words, " \t");
12305 if (Words.size() == 2 && Words[0] == "bswap" && Words[1] == "%edx") {
12307 SplitString(AsmPieces[2], Words, " \t,");
12308 if (Words.size() == 3 && Words[0] == "xchgl" && Words[1] == "%eax" &&
12309 Words[2] == "%edx") {
12310 const IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
12311 if (!Ty || Ty->getBitWidth() % 16 != 0)
12313 return IntrinsicLowering::LowerToByteSwap(CI);
12326 /// getConstraintType - Given a constraint letter, return the type of
12327 /// constraint it is for this target.
12328 X86TargetLowering::ConstraintType
12329 X86TargetLowering::getConstraintType(const std::string &Constraint) const {
12330 if (Constraint.size() == 1) {
12331 switch (Constraint[0]) {
12341 return C_RegisterClass;
12365 return TargetLowering::getConstraintType(Constraint);
12368 /// Examine constraint type and operand type and determine a weight value.
12369 /// This object must already have been set up with the operand type
12370 /// and the current alternative constraint selected.
12371 TargetLowering::ConstraintWeight
12372 X86TargetLowering::getSingleConstraintMatchWeight(
12373 AsmOperandInfo &info, const char *constraint) const {
12374 ConstraintWeight weight = CW_Invalid;
12375 Value *CallOperandVal = info.CallOperandVal;
12376 // If we don't have a value, we can't do a match,
12377 // but allow it at the lowest weight.
12378 if (CallOperandVal == NULL)
12380 const Type *type = CallOperandVal->getType();
12381 // Look at the constraint type.
12382 switch (*constraint) {
12384 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
12395 if (CallOperandVal->getType()->isIntegerTy())
12396 weight = CW_SpecificReg;
12401 if (type->isFloatingPointTy())
12402 weight = CW_SpecificReg;
12405 if (type->isX86_MMXTy() && Subtarget->hasMMX())
12406 weight = CW_SpecificReg;
12410 if ((type->getPrimitiveSizeInBits() == 128) && Subtarget->hasXMM())
12411 weight = CW_Register;
12414 if (ConstantInt *C = dyn_cast<ConstantInt>(info.CallOperandVal)) {
12415 if (C->getZExtValue() <= 31)
12416 weight = CW_Constant;
12420 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
12421 if (C->getZExtValue() <= 63)
12422 weight = CW_Constant;
12426 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
12427 if ((C->getSExtValue() >= -0x80) && (C->getSExtValue() <= 0x7f))
12428 weight = CW_Constant;
12432 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
12433 if ((C->getZExtValue() == 0xff) || (C->getZExtValue() == 0xffff))
12434 weight = CW_Constant;
12438 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
12439 if (C->getZExtValue() <= 3)
12440 weight = CW_Constant;
12444 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
12445 if (C->getZExtValue() <= 0xff)
12446 weight = CW_Constant;
12451 if (dyn_cast<ConstantFP>(CallOperandVal)) {
12452 weight = CW_Constant;
12456 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
12457 if ((C->getSExtValue() >= -0x80000000LL) &&
12458 (C->getSExtValue() <= 0x7fffffffLL))
12459 weight = CW_Constant;
12463 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
12464 if (C->getZExtValue() <= 0xffffffff)
12465 weight = CW_Constant;
12472 /// LowerXConstraint - try to replace an X constraint, which matches anything,
12473 /// with another that has more specific requirements based on the type of the
12474 /// corresponding operand.
12475 const char *X86TargetLowering::
12476 LowerXConstraint(EVT ConstraintVT) const {
12477 // FP X constraints get lowered to SSE1/2 registers if available, otherwise
12478 // 'f' like normal targets.
12479 if (ConstraintVT.isFloatingPoint()) {
12480 if (Subtarget->hasXMMInt())
12482 if (Subtarget->hasXMM())
12486 return TargetLowering::LowerXConstraint(ConstraintVT);
12489 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
12490 /// vector. If it is invalid, don't add anything to Ops.
12491 void X86TargetLowering::LowerAsmOperandForConstraint(SDValue Op,
12493 std::vector<SDValue>&Ops,
12494 SelectionDAG &DAG) const {
12495 SDValue Result(0, 0);
12497 switch (Constraint) {
12500 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
12501 if (C->getZExtValue() <= 31) {
12502 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
12508 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
12509 if (C->getZExtValue() <= 63) {
12510 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
12516 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
12517 if ((int8_t)C->getSExtValue() == C->getSExtValue()) {
12518 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
12524 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
12525 if (C->getZExtValue() <= 255) {
12526 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
12532 // 32-bit signed value
12533 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
12534 if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()),
12535 C->getSExtValue())) {
12536 // Widen to 64 bits here to get it sign extended.
12537 Result = DAG.getTargetConstant(C->getSExtValue(), MVT::i64);
12540 // FIXME gcc accepts some relocatable values here too, but only in certain
12541 // memory models; it's complicated.
12546 // 32-bit unsigned value
12547 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
12548 if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()),
12549 C->getZExtValue())) {
12550 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
12554 // FIXME gcc accepts some relocatable values here too, but only in certain
12555 // memory models; it's complicated.
12559 // Literal immediates are always ok.
12560 if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(Op)) {
12561 // Widen to 64 bits here to get it sign extended.
12562 Result = DAG.getTargetConstant(CST->getSExtValue(), MVT::i64);
12566 // In any sort of PIC mode addresses need to be computed at runtime by
12567 // adding in a register or some sort of table lookup. These can't
12568 // be used as immediates.
12569 if (Subtarget->isPICStyleGOT() || Subtarget->isPICStyleStubPIC())
12572 // If we are in non-pic codegen mode, we allow the address of a global (with
12573 // an optional displacement) to be used with 'i'.
12574 GlobalAddressSDNode *GA = 0;
12575 int64_t Offset = 0;
12577 // Match either (GA), (GA+C), (GA+C1+C2), etc.
12579 if ((GA = dyn_cast<GlobalAddressSDNode>(Op))) {
12580 Offset += GA->getOffset();
12582 } else if (Op.getOpcode() == ISD::ADD) {
12583 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
12584 Offset += C->getZExtValue();
12585 Op = Op.getOperand(0);
12588 } else if (Op.getOpcode() == ISD::SUB) {
12589 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
12590 Offset += -C->getZExtValue();
12591 Op = Op.getOperand(0);
12596 // Otherwise, this isn't something we can handle, reject it.
12600 const GlobalValue *GV = GA->getGlobal();
12601 // If we require an extra load to get this address, as in PIC mode, we
12602 // can't accept it.
12603 if (isGlobalStubReference(Subtarget->ClassifyGlobalReference(GV,
12604 getTargetMachine())))
12607 Result = DAG.getTargetGlobalAddress(GV, Op.getDebugLoc(),
12608 GA->getValueType(0), Offset);
12613 if (Result.getNode()) {
12614 Ops.push_back(Result);
12617 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
12620 std::vector<unsigned> X86TargetLowering::
12621 getRegClassForInlineAsmConstraint(const std::string &Constraint,
12623 if (Constraint.size() == 1) {
12624 // FIXME: not handling fp-stack yet!
12625 switch (Constraint[0]) { // GCC X86 Constraint Letters
12626 default: break; // Unknown constraint letter
12627 case 'q': // GENERAL_REGS in 64-bit mode, Q_REGS in 32-bit mode.
12628 if (Subtarget->is64Bit()) {
12629 if (VT == MVT::i32)
12630 return make_vector<unsigned>(X86::EAX, X86::EDX, X86::ECX, X86::EBX,
12631 X86::ESI, X86::EDI, X86::R8D, X86::R9D,
12632 X86::R10D,X86::R11D,X86::R12D,
12633 X86::R13D,X86::R14D,X86::R15D,
12634 X86::EBP, X86::ESP, 0);
12635 else if (VT == MVT::i16)
12636 return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX,
12637 X86::SI, X86::DI, X86::R8W,X86::R9W,
12638 X86::R10W,X86::R11W,X86::R12W,
12639 X86::R13W,X86::R14W,X86::R15W,
12640 X86::BP, X86::SP, 0);
12641 else if (VT == MVT::i8)
12642 return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::BL,
12643 X86::SIL, X86::DIL, X86::R8B,X86::R9B,
12644 X86::R10B,X86::R11B,X86::R12B,
12645 X86::R13B,X86::R14B,X86::R15B,
12646 X86::BPL, X86::SPL, 0);
12648 else if (VT == MVT::i64)
12649 return make_vector<unsigned>(X86::RAX, X86::RDX, X86::RCX, X86::RBX,
12650 X86::RSI, X86::RDI, X86::R8, X86::R9,
12651 X86::R10, X86::R11, X86::R12,
12652 X86::R13, X86::R14, X86::R15,
12653 X86::RBP, X86::RSP, 0);
12657 // 32-bit fallthrough
12658 case 'Q': // Q_REGS
12659 if (VT == MVT::i32)
12660 return make_vector<unsigned>(X86::EAX, X86::EDX, X86::ECX, X86::EBX, 0);
12661 else if (VT == MVT::i16)
12662 return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX, 0);
12663 else if (VT == MVT::i8)
12664 return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::BL, 0);
12665 else if (VT == MVT::i64)
12666 return make_vector<unsigned>(X86::RAX, X86::RDX, X86::RCX, X86::RBX, 0);
12671 return std::vector<unsigned>();
12674 std::pair<unsigned, const TargetRegisterClass*>
12675 X86TargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
12677 // First, see if this is a constraint that directly corresponds to an LLVM
12679 if (Constraint.size() == 1) {
12680 // GCC Constraint Letters
12681 switch (Constraint[0]) {
12683 case 'r': // GENERAL_REGS
12684 case 'l': // INDEX_REGS
12686 return std::make_pair(0U, X86::GR8RegisterClass);
12687 if (VT == MVT::i16)
12688 return std::make_pair(0U, X86::GR16RegisterClass);
12689 if (VT == MVT::i32 || !Subtarget->is64Bit())
12690 return std::make_pair(0U, X86::GR32RegisterClass);
12691 return std::make_pair(0U, X86::GR64RegisterClass);
12692 case 'R': // LEGACY_REGS
12694 return std::make_pair(0U, X86::GR8_NOREXRegisterClass);
12695 if (VT == MVT::i16)
12696 return std::make_pair(0U, X86::GR16_NOREXRegisterClass);
12697 if (VT == MVT::i32 || !Subtarget->is64Bit())
12698 return std::make_pair(0U, X86::GR32_NOREXRegisterClass);
12699 return std::make_pair(0U, X86::GR64_NOREXRegisterClass);
12700 case 'f': // FP Stack registers.
12701 // If SSE is enabled for this VT, use f80 to ensure the isel moves the
12702 // value to the correct fpstack register class.
12703 if (VT == MVT::f32 && !isScalarFPTypeInSSEReg(VT))
12704 return std::make_pair(0U, X86::RFP32RegisterClass);
12705 if (VT == MVT::f64 && !isScalarFPTypeInSSEReg(VT))
12706 return std::make_pair(0U, X86::RFP64RegisterClass);
12707 return std::make_pair(0U, X86::RFP80RegisterClass);
12708 case 'y': // MMX_REGS if MMX allowed.
12709 if (!Subtarget->hasMMX()) break;
12710 return std::make_pair(0U, X86::VR64RegisterClass);
12711 case 'Y': // SSE_REGS if SSE2 allowed
12712 if (!Subtarget->hasXMMInt()) break;
12714 case 'x': // SSE_REGS if SSE1 allowed
12715 if (!Subtarget->hasXMM()) break;
12717 switch (VT.getSimpleVT().SimpleTy) {
12719 // Scalar SSE types.
12722 return std::make_pair(0U, X86::FR32RegisterClass);
12725 return std::make_pair(0U, X86::FR64RegisterClass);
12733 return std::make_pair(0U, X86::VR128RegisterClass);
12739 // Use the default implementation in TargetLowering to convert the register
12740 // constraint into a member of a register class.
12741 std::pair<unsigned, const TargetRegisterClass*> Res;
12742 Res = TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
12744 // Not found as a standard register?
12745 if (Res.second == 0) {
12746 // Map st(0) -> st(7) -> ST0
12747 if (Constraint.size() == 7 && Constraint[0] == '{' &&
12748 tolower(Constraint[1]) == 's' &&
12749 tolower(Constraint[2]) == 't' &&
12750 Constraint[3] == '(' &&
12751 (Constraint[4] >= '0' && Constraint[4] <= '7') &&
12752 Constraint[5] == ')' &&
12753 Constraint[6] == '}') {
12755 Res.first = X86::ST0+Constraint[4]-'0';
12756 Res.second = X86::RFP80RegisterClass;
12760 // GCC allows "st(0)" to be called just plain "st".
12761 if (StringRef("{st}").equals_lower(Constraint)) {
12762 Res.first = X86::ST0;
12763 Res.second = X86::RFP80RegisterClass;
12768 if (StringRef("{flags}").equals_lower(Constraint)) {
12769 Res.first = X86::EFLAGS;
12770 Res.second = X86::CCRRegisterClass;
12774 // 'A' means EAX + EDX.
12775 if (Constraint == "A") {
12776 Res.first = X86::EAX;
12777 Res.second = X86::GR32_ADRegisterClass;
12783 // Otherwise, check to see if this is a register class of the wrong value
12784 // type. For example, we want to map "{ax},i32" -> {eax}, we don't want it to
12785 // turn into {ax},{dx}.
12786 if (Res.second->hasType(VT))
12787 return Res; // Correct type already, nothing to do.
12789 // All of the single-register GCC register classes map their values onto
12790 // 16-bit register pieces "ax","dx","cx","bx","si","di","bp","sp". If we
12791 // really want an 8-bit or 32-bit register, map to the appropriate register
12792 // class and return the appropriate register.
12793 if (Res.second == X86::GR16RegisterClass) {
12794 if (VT == MVT::i8) {
12795 unsigned DestReg = 0;
12796 switch (Res.first) {
12798 case X86::AX: DestReg = X86::AL; break;
12799 case X86::DX: DestReg = X86::DL; break;
12800 case X86::CX: DestReg = X86::CL; break;
12801 case X86::BX: DestReg = X86::BL; break;
12804 Res.first = DestReg;
12805 Res.second = X86::GR8RegisterClass;
12807 } else if (VT == MVT::i32) {
12808 unsigned DestReg = 0;
12809 switch (Res.first) {
12811 case X86::AX: DestReg = X86::EAX; break;
12812 case X86::DX: DestReg = X86::EDX; break;
12813 case X86::CX: DestReg = X86::ECX; break;
12814 case X86::BX: DestReg = X86::EBX; break;
12815 case X86::SI: DestReg = X86::ESI; break;
12816 case X86::DI: DestReg = X86::EDI; break;
12817 case X86::BP: DestReg = X86::EBP; break;
12818 case X86::SP: DestReg = X86::ESP; break;
12821 Res.first = DestReg;
12822 Res.second = X86::GR32RegisterClass;
12824 } else if (VT == MVT::i64) {
12825 unsigned DestReg = 0;
12826 switch (Res.first) {
12828 case X86::AX: DestReg = X86::RAX; break;
12829 case X86::DX: DestReg = X86::RDX; break;
12830 case X86::CX: DestReg = X86::RCX; break;
12831 case X86::BX: DestReg = X86::RBX; break;
12832 case X86::SI: DestReg = X86::RSI; break;
12833 case X86::DI: DestReg = X86::RDI; break;
12834 case X86::BP: DestReg = X86::RBP; break;
12835 case X86::SP: DestReg = X86::RSP; break;
12838 Res.first = DestReg;
12839 Res.second = X86::GR64RegisterClass;
12842 } else if (Res.second == X86::FR32RegisterClass ||
12843 Res.second == X86::FR64RegisterClass ||
12844 Res.second == X86::VR128RegisterClass) {
12845 // Handle references to XMM physical registers that got mapped into the
12846 // wrong class. This can happen with constraints like {xmm0} where the
12847 // target independent register mapper will just pick the first match it can
12848 // find, ignoring the required type.
12849 if (VT == MVT::f32)
12850 Res.second = X86::FR32RegisterClass;
12851 else if (VT == MVT::f64)
12852 Res.second = X86::FR64RegisterClass;
12853 else if (X86::VR128RegisterClass->hasType(VT))
12854 Res.second = X86::VR128RegisterClass;