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/MC/MCAsmInfo.h"
39 #include "llvm/MC/MCContext.h"
40 #include "llvm/MC/MCExpr.h"
41 #include "llvm/MC/MCSymbol.h"
42 #include "llvm/ADT/BitVector.h"
43 #include "llvm/ADT/SmallSet.h"
44 #include "llvm/ADT/Statistic.h"
45 #include "llvm/ADT/StringExtras.h"
46 #include "llvm/ADT/VariadicFunction.h"
47 #include "llvm/Support/CallSite.h"
48 #include "llvm/Support/CommandLine.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"
54 #include "llvm/Target/TargetOptions.h"
57 using namespace dwarf;
59 STATISTIC(NumTailCalls, "Number of tail calls");
61 static cl::opt<bool> UseRegMask("x86-use-regmask",
62 cl::desc("Use register masks for x86 calls"));
64 // Forward declarations.
65 static SDValue getMOVL(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
68 /// Generate a DAG to grab 128-bits from a vector > 128 bits. This
69 /// sets things up to match to an AVX VEXTRACTF128 instruction or a
70 /// simple subregister reference. Idx is an index in the 128 bits we
71 /// want. It need not be aligned to a 128-bit bounday. That makes
72 /// lowering EXTRACT_VECTOR_ELT operations easier.
73 static SDValue Extract128BitVector(SDValue Vec,
77 EVT VT = Vec.getValueType();
78 assert(VT.getSizeInBits() == 256 && "Unexpected vector size!");
79 EVT ElVT = VT.getVectorElementType();
80 int Factor = VT.getSizeInBits()/128;
81 EVT ResultVT = EVT::getVectorVT(*DAG.getContext(), ElVT,
82 VT.getVectorNumElements()/Factor);
84 // Extract from UNDEF is UNDEF.
85 if (Vec.getOpcode() == ISD::UNDEF)
86 return DAG.getNode(ISD::UNDEF, dl, ResultVT);
88 if (isa<ConstantSDNode>(Idx)) {
89 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
91 // Extract the relevant 128 bits. Generate an EXTRACT_SUBVECTOR
92 // we can match to VEXTRACTF128.
93 unsigned ElemsPerChunk = 128 / ElVT.getSizeInBits();
95 // This is the index of the first element of the 128-bit chunk
97 unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits()) / 128)
100 SDValue VecIdx = DAG.getConstant(NormalizedIdxVal, MVT::i32);
101 SDValue Result = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, ResultVT, Vec,
110 /// Generate a DAG to put 128-bits into a vector > 128 bits. This
111 /// sets things up to match to an AVX VINSERTF128 instruction or a
112 /// simple superregister reference. Idx is an index in the 128 bits
113 /// we want. It need not be aligned to a 128-bit bounday. That makes
114 /// lowering INSERT_VECTOR_ELT operations easier.
115 static SDValue Insert128BitVector(SDValue Result,
120 if (isa<ConstantSDNode>(Idx)) {
121 EVT VT = Vec.getValueType();
122 assert(VT.getSizeInBits() == 128 && "Unexpected vector size!");
124 EVT ElVT = VT.getVectorElementType();
125 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
126 EVT ResultVT = Result.getValueType();
128 // Insert the relevant 128 bits.
129 unsigned ElemsPerChunk = 128/ElVT.getSizeInBits();
131 // This is the index of the first element of the 128-bit chunk
133 unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits())/128)
136 SDValue VecIdx = DAG.getConstant(NormalizedIdxVal, MVT::i32);
137 Result = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, ResultVT, Result, Vec,
145 static TargetLoweringObjectFile *createTLOF(X86TargetMachine &TM) {
146 const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
147 bool is64Bit = Subtarget->is64Bit();
149 if (Subtarget->isTargetEnvMacho()) {
151 return new X8664_MachoTargetObjectFile();
152 return new TargetLoweringObjectFileMachO();
155 if (Subtarget->isTargetELF())
156 return new TargetLoweringObjectFileELF();
157 if (Subtarget->isTargetCOFF() && !Subtarget->isTargetEnvMacho())
158 return new TargetLoweringObjectFileCOFF();
159 llvm_unreachable("unknown subtarget type");
162 X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
163 : TargetLowering(TM, createTLOF(TM)) {
164 Subtarget = &TM.getSubtarget<X86Subtarget>();
165 X86ScalarSSEf64 = Subtarget->hasSSE2();
166 X86ScalarSSEf32 = Subtarget->hasSSE1();
167 X86StackPtr = Subtarget->is64Bit() ? X86::RSP : X86::ESP;
169 RegInfo = TM.getRegisterInfo();
170 TD = getTargetData();
172 // Set up the TargetLowering object.
173 static MVT IntVTs[] = { MVT::i8, MVT::i16, MVT::i32, MVT::i64 };
175 // X86 is weird, it always uses i8 for shift amounts and setcc results.
176 setBooleanContents(ZeroOrOneBooleanContent);
177 // X86-SSE is even stranger. It uses -1 or 0 for vector masks.
178 setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
180 // For 64-bit since we have so many registers use the ILP scheduler, for
181 // 32-bit code use the register pressure specific scheduling.
182 // For 32 bit Atom, use Hybrid (register pressure + latency) scheduling.
183 if (Subtarget->is64Bit())
184 setSchedulingPreference(Sched::ILP);
185 else if (Subtarget->isAtom())
186 setSchedulingPreference(Sched::Hybrid);
188 setSchedulingPreference(Sched::RegPressure);
189 setStackPointerRegisterToSaveRestore(X86StackPtr);
191 if (Subtarget->isTargetWindows() && !Subtarget->isTargetCygMing()) {
192 // Setup Windows compiler runtime calls.
193 setLibcallName(RTLIB::SDIV_I64, "_alldiv");
194 setLibcallName(RTLIB::UDIV_I64, "_aulldiv");
195 setLibcallName(RTLIB::SREM_I64, "_allrem");
196 setLibcallName(RTLIB::UREM_I64, "_aullrem");
197 setLibcallName(RTLIB::MUL_I64, "_allmul");
198 setLibcallName(RTLIB::FPTOUINT_F64_I64, "_ftol2");
199 setLibcallName(RTLIB::FPTOUINT_F32_I64, "_ftol2");
200 setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::X86_StdCall);
201 setLibcallCallingConv(RTLIB::UDIV_I64, CallingConv::X86_StdCall);
202 setLibcallCallingConv(RTLIB::SREM_I64, CallingConv::X86_StdCall);
203 setLibcallCallingConv(RTLIB::UREM_I64, CallingConv::X86_StdCall);
204 setLibcallCallingConv(RTLIB::MUL_I64, CallingConv::X86_StdCall);
205 setLibcallCallingConv(RTLIB::FPTOUINT_F64_I64, CallingConv::C);
206 setLibcallCallingConv(RTLIB::FPTOUINT_F32_I64, CallingConv::C);
209 if (Subtarget->isTargetDarwin()) {
210 // Darwin should use _setjmp/_longjmp instead of setjmp/longjmp.
211 setUseUnderscoreSetJmp(false);
212 setUseUnderscoreLongJmp(false);
213 } else if (Subtarget->isTargetMingw()) {
214 // MS runtime is weird: it exports _setjmp, but longjmp!
215 setUseUnderscoreSetJmp(true);
216 setUseUnderscoreLongJmp(false);
218 setUseUnderscoreSetJmp(true);
219 setUseUnderscoreLongJmp(true);
222 // Set up the register classes.
223 addRegisterClass(MVT::i8, X86::GR8RegisterClass);
224 addRegisterClass(MVT::i16, X86::GR16RegisterClass);
225 addRegisterClass(MVT::i32, X86::GR32RegisterClass);
226 if (Subtarget->is64Bit())
227 addRegisterClass(MVT::i64, X86::GR64RegisterClass);
229 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
231 // We don't accept any truncstore of integer registers.
232 setTruncStoreAction(MVT::i64, MVT::i32, Expand);
233 setTruncStoreAction(MVT::i64, MVT::i16, Expand);
234 setTruncStoreAction(MVT::i64, MVT::i8 , Expand);
235 setTruncStoreAction(MVT::i32, MVT::i16, Expand);
236 setTruncStoreAction(MVT::i32, MVT::i8 , Expand);
237 setTruncStoreAction(MVT::i16, MVT::i8, Expand);
239 // SETOEQ and SETUNE require checking two conditions.
240 setCondCodeAction(ISD::SETOEQ, MVT::f32, Expand);
241 setCondCodeAction(ISD::SETOEQ, MVT::f64, Expand);
242 setCondCodeAction(ISD::SETOEQ, MVT::f80, Expand);
243 setCondCodeAction(ISD::SETUNE, MVT::f32, Expand);
244 setCondCodeAction(ISD::SETUNE, MVT::f64, Expand);
245 setCondCodeAction(ISD::SETUNE, MVT::f80, Expand);
247 // Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this
249 setOperationAction(ISD::UINT_TO_FP , MVT::i1 , Promote);
250 setOperationAction(ISD::UINT_TO_FP , MVT::i8 , Promote);
251 setOperationAction(ISD::UINT_TO_FP , MVT::i16 , Promote);
253 if (Subtarget->is64Bit()) {
254 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Promote);
255 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Custom);
256 } else if (!TM.Options.UseSoftFloat) {
257 // We have an algorithm for SSE2->double, and we turn this into a
258 // 64-bit FILD followed by conditional FADD for other targets.
259 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Custom);
260 // We have an algorithm for SSE2, and we turn this into a 64-bit
261 // FILD for other targets.
262 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Custom);
265 // Promote i1/i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have
267 setOperationAction(ISD::SINT_TO_FP , MVT::i1 , Promote);
268 setOperationAction(ISD::SINT_TO_FP , MVT::i8 , Promote);
270 if (!TM.Options.UseSoftFloat) {
271 // SSE has no i16 to fp conversion, only i32
272 if (X86ScalarSSEf32) {
273 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
274 // f32 and f64 cases are Legal, f80 case is not
275 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
277 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Custom);
278 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
281 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
282 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Promote);
285 // In 32-bit mode these are custom lowered. In 64-bit mode F32 and F64
286 // are Legal, f80 is custom lowered.
287 setOperationAction(ISD::FP_TO_SINT , MVT::i64 , Custom);
288 setOperationAction(ISD::SINT_TO_FP , MVT::i64 , Custom);
290 // Promote i1/i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have
292 setOperationAction(ISD::FP_TO_SINT , MVT::i1 , Promote);
293 setOperationAction(ISD::FP_TO_SINT , MVT::i8 , Promote);
295 if (X86ScalarSSEf32) {
296 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Promote);
297 // f32 and f64 cases are Legal, f80 case is not
298 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
300 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Custom);
301 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
304 // Handle FP_TO_UINT by promoting the destination to a larger signed
306 setOperationAction(ISD::FP_TO_UINT , MVT::i1 , Promote);
307 setOperationAction(ISD::FP_TO_UINT , MVT::i8 , Promote);
308 setOperationAction(ISD::FP_TO_UINT , MVT::i16 , Promote);
310 if (Subtarget->is64Bit()) {
311 setOperationAction(ISD::FP_TO_UINT , MVT::i64 , Expand);
312 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
313 } else if (!TM.Options.UseSoftFloat) {
314 // Since AVX is a superset of SSE3, only check for SSE here.
315 if (Subtarget->hasSSE1() && !Subtarget->hasSSE3())
316 // Expand FP_TO_UINT into a select.
317 // FIXME: We would like to use a Custom expander here eventually to do
318 // the optimal thing for SSE vs. the default expansion in the legalizer.
319 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Expand);
321 // With SSE3 we can use fisttpll to convert to a signed i64; without
322 // SSE, we're stuck with a fistpll.
323 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Custom);
326 // TODO: when we have SSE, these could be more efficient, by using movd/movq.
327 if (!X86ScalarSSEf64) {
328 setOperationAction(ISD::BITCAST , MVT::f32 , Expand);
329 setOperationAction(ISD::BITCAST , MVT::i32 , Expand);
330 if (Subtarget->is64Bit()) {
331 setOperationAction(ISD::BITCAST , MVT::f64 , Expand);
332 // Without SSE, i64->f64 goes through memory.
333 setOperationAction(ISD::BITCAST , MVT::i64 , Expand);
337 // Scalar integer divide and remainder are lowered to use operations that
338 // produce two results, to match the available instructions. This exposes
339 // the two-result form to trivial CSE, which is able to combine x/y and x%y
340 // into a single instruction.
342 // Scalar integer multiply-high is also lowered to use two-result
343 // operations, to match the available instructions. However, plain multiply
344 // (low) operations are left as Legal, as there are single-result
345 // instructions for this in x86. Using the two-result multiply instructions
346 // when both high and low results are needed must be arranged by dagcombine.
347 for (unsigned i = 0, e = 4; i != e; ++i) {
349 setOperationAction(ISD::MULHS, VT, Expand);
350 setOperationAction(ISD::MULHU, VT, Expand);
351 setOperationAction(ISD::SDIV, VT, Expand);
352 setOperationAction(ISD::UDIV, VT, Expand);
353 setOperationAction(ISD::SREM, VT, Expand);
354 setOperationAction(ISD::UREM, VT, Expand);
356 // Add/Sub overflow ops with MVT::Glues are lowered to EFLAGS dependences.
357 setOperationAction(ISD::ADDC, VT, Custom);
358 setOperationAction(ISD::ADDE, VT, Custom);
359 setOperationAction(ISD::SUBC, VT, Custom);
360 setOperationAction(ISD::SUBE, VT, Custom);
363 setOperationAction(ISD::BR_JT , MVT::Other, Expand);
364 setOperationAction(ISD::BRCOND , MVT::Other, Custom);
365 setOperationAction(ISD::BR_CC , MVT::Other, Expand);
366 setOperationAction(ISD::SELECT_CC , MVT::Other, Expand);
367 if (Subtarget->is64Bit())
368 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i32, Legal);
369 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16 , Legal);
370 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Legal);
371 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
372 setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
373 setOperationAction(ISD::FREM , MVT::f32 , Expand);
374 setOperationAction(ISD::FREM , MVT::f64 , Expand);
375 setOperationAction(ISD::FREM , MVT::f80 , Expand);
376 setOperationAction(ISD::FLT_ROUNDS_ , MVT::i32 , Custom);
378 // Promote the i8 variants and force them on up to i32 which has a shorter
380 setOperationAction(ISD::CTTZ , MVT::i8 , Promote);
381 AddPromotedToType (ISD::CTTZ , MVT::i8 , MVT::i32);
382 setOperationAction(ISD::CTTZ_ZERO_UNDEF , MVT::i8 , Promote);
383 AddPromotedToType (ISD::CTTZ_ZERO_UNDEF , MVT::i8 , MVT::i32);
384 if (Subtarget->hasBMI()) {
385 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i16 , Expand);
386 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32 , Expand);
387 if (Subtarget->is64Bit())
388 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i64, Expand);
390 setOperationAction(ISD::CTTZ , MVT::i16 , Custom);
391 setOperationAction(ISD::CTTZ , MVT::i32 , Custom);
392 if (Subtarget->is64Bit())
393 setOperationAction(ISD::CTTZ , MVT::i64 , Custom);
396 if (Subtarget->hasLZCNT()) {
397 // When promoting the i8 variants, force them to i32 for a shorter
399 setOperationAction(ISD::CTLZ , MVT::i8 , Promote);
400 AddPromotedToType (ISD::CTLZ , MVT::i8 , MVT::i32);
401 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i8 , Promote);
402 AddPromotedToType (ISD::CTLZ_ZERO_UNDEF, MVT::i8 , MVT::i32);
403 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i16 , Expand);
404 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32 , Expand);
405 if (Subtarget->is64Bit())
406 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Expand);
408 setOperationAction(ISD::CTLZ , MVT::i8 , Custom);
409 setOperationAction(ISD::CTLZ , MVT::i16 , Custom);
410 setOperationAction(ISD::CTLZ , MVT::i32 , Custom);
411 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i8 , Custom);
412 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i16 , Custom);
413 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32 , Custom);
414 if (Subtarget->is64Bit()) {
415 setOperationAction(ISD::CTLZ , MVT::i64 , Custom);
416 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Custom);
420 if (Subtarget->hasPOPCNT()) {
421 setOperationAction(ISD::CTPOP , MVT::i8 , Promote);
423 setOperationAction(ISD::CTPOP , MVT::i8 , Expand);
424 setOperationAction(ISD::CTPOP , MVT::i16 , Expand);
425 setOperationAction(ISD::CTPOP , MVT::i32 , Expand);
426 if (Subtarget->is64Bit())
427 setOperationAction(ISD::CTPOP , MVT::i64 , Expand);
430 setOperationAction(ISD::READCYCLECOUNTER , MVT::i64 , Custom);
431 setOperationAction(ISD::BSWAP , MVT::i16 , Expand);
433 // These should be promoted to a larger select which is supported.
434 setOperationAction(ISD::SELECT , MVT::i1 , Promote);
435 // X86 wants to expand cmov itself.
436 setOperationAction(ISD::SELECT , MVT::i8 , Custom);
437 setOperationAction(ISD::SELECT , MVT::i16 , Custom);
438 setOperationAction(ISD::SELECT , MVT::i32 , Custom);
439 setOperationAction(ISD::SELECT , MVT::f32 , Custom);
440 setOperationAction(ISD::SELECT , MVT::f64 , Custom);
441 setOperationAction(ISD::SELECT , MVT::f80 , Custom);
442 setOperationAction(ISD::SETCC , MVT::i8 , Custom);
443 setOperationAction(ISD::SETCC , MVT::i16 , Custom);
444 setOperationAction(ISD::SETCC , MVT::i32 , Custom);
445 setOperationAction(ISD::SETCC , MVT::f32 , Custom);
446 setOperationAction(ISD::SETCC , MVT::f64 , Custom);
447 setOperationAction(ISD::SETCC , MVT::f80 , Custom);
448 if (Subtarget->is64Bit()) {
449 setOperationAction(ISD::SELECT , MVT::i64 , Custom);
450 setOperationAction(ISD::SETCC , MVT::i64 , Custom);
452 setOperationAction(ISD::EH_RETURN , MVT::Other, Custom);
455 setOperationAction(ISD::ConstantPool , MVT::i32 , Custom);
456 setOperationAction(ISD::JumpTable , MVT::i32 , Custom);
457 setOperationAction(ISD::GlobalAddress , MVT::i32 , Custom);
458 setOperationAction(ISD::GlobalTLSAddress, MVT::i32 , Custom);
459 if (Subtarget->is64Bit())
460 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
461 setOperationAction(ISD::ExternalSymbol , MVT::i32 , Custom);
462 setOperationAction(ISD::BlockAddress , MVT::i32 , Custom);
463 if (Subtarget->is64Bit()) {
464 setOperationAction(ISD::ConstantPool , MVT::i64 , Custom);
465 setOperationAction(ISD::JumpTable , MVT::i64 , Custom);
466 setOperationAction(ISD::GlobalAddress , MVT::i64 , Custom);
467 setOperationAction(ISD::ExternalSymbol, MVT::i64 , Custom);
468 setOperationAction(ISD::BlockAddress , MVT::i64 , Custom);
470 // 64-bit addm sub, shl, sra, srl (iff 32-bit x86)
471 setOperationAction(ISD::SHL_PARTS , MVT::i32 , Custom);
472 setOperationAction(ISD::SRA_PARTS , MVT::i32 , Custom);
473 setOperationAction(ISD::SRL_PARTS , MVT::i32 , Custom);
474 if (Subtarget->is64Bit()) {
475 setOperationAction(ISD::SHL_PARTS , MVT::i64 , Custom);
476 setOperationAction(ISD::SRA_PARTS , MVT::i64 , Custom);
477 setOperationAction(ISD::SRL_PARTS , MVT::i64 , Custom);
480 if (Subtarget->hasSSE1())
481 setOperationAction(ISD::PREFETCH , MVT::Other, Legal);
483 setOperationAction(ISD::MEMBARRIER , MVT::Other, Custom);
484 setOperationAction(ISD::ATOMIC_FENCE , MVT::Other, Custom);
486 // On X86 and X86-64, atomic operations are lowered to locked instructions.
487 // Locked instructions, in turn, have implicit fence semantics (all memory
488 // operations are flushed before issuing the locked instruction, and they
489 // are not buffered), so we can fold away the common pattern of
490 // fence-atomic-fence.
491 setShouldFoldAtomicFences(true);
493 // Expand certain atomics
494 for (unsigned i = 0, e = 4; i != e; ++i) {
496 setOperationAction(ISD::ATOMIC_CMP_SWAP, VT, Custom);
497 setOperationAction(ISD::ATOMIC_LOAD_SUB, VT, Custom);
498 setOperationAction(ISD::ATOMIC_STORE, VT, Custom);
501 if (!Subtarget->is64Bit()) {
502 setOperationAction(ISD::ATOMIC_LOAD, MVT::i64, Custom);
503 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i64, Custom);
504 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i64, Custom);
505 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i64, Custom);
506 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i64, Custom);
507 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i64, Custom);
508 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i64, Custom);
509 setOperationAction(ISD::ATOMIC_SWAP, MVT::i64, Custom);
512 if (Subtarget->hasCmpxchg16b()) {
513 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i128, Custom);
516 // FIXME - use subtarget debug flags
517 if (!Subtarget->isTargetDarwin() &&
518 !Subtarget->isTargetELF() &&
519 !Subtarget->isTargetCygMing()) {
520 setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
523 setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
524 setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
525 setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
526 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
527 if (Subtarget->is64Bit()) {
528 setExceptionPointerRegister(X86::RAX);
529 setExceptionSelectorRegister(X86::RDX);
531 setExceptionPointerRegister(X86::EAX);
532 setExceptionSelectorRegister(X86::EDX);
534 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i32, Custom);
535 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i64, Custom);
537 setOperationAction(ISD::INIT_TRAMPOLINE, MVT::Other, Custom);
538 setOperationAction(ISD::ADJUST_TRAMPOLINE, MVT::Other, Custom);
540 setOperationAction(ISD::TRAP, MVT::Other, Legal);
542 // VASTART needs to be custom lowered to use the VarArgsFrameIndex
543 setOperationAction(ISD::VASTART , MVT::Other, Custom);
544 setOperationAction(ISD::VAEND , MVT::Other, Expand);
545 if (Subtarget->is64Bit()) {
546 setOperationAction(ISD::VAARG , MVT::Other, Custom);
547 setOperationAction(ISD::VACOPY , MVT::Other, Custom);
549 setOperationAction(ISD::VAARG , MVT::Other, Expand);
550 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
553 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
554 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
556 if (Subtarget->isTargetCOFF() && !Subtarget->isTargetEnvMacho())
557 setOperationAction(ISD::DYNAMIC_STACKALLOC, Subtarget->is64Bit() ?
558 MVT::i64 : MVT::i32, Custom);
559 else if (TM.Options.EnableSegmentedStacks)
560 setOperationAction(ISD::DYNAMIC_STACKALLOC, Subtarget->is64Bit() ?
561 MVT::i64 : MVT::i32, Custom);
563 setOperationAction(ISD::DYNAMIC_STACKALLOC, Subtarget->is64Bit() ?
564 MVT::i64 : MVT::i32, Expand);
566 if (!TM.Options.UseSoftFloat && X86ScalarSSEf64) {
567 // f32 and f64 use SSE.
568 // Set up the FP register classes.
569 addRegisterClass(MVT::f32, X86::FR32RegisterClass);
570 addRegisterClass(MVT::f64, X86::FR64RegisterClass);
572 // Use ANDPD to simulate FABS.
573 setOperationAction(ISD::FABS , MVT::f64, Custom);
574 setOperationAction(ISD::FABS , MVT::f32, Custom);
576 // Use XORP to simulate FNEG.
577 setOperationAction(ISD::FNEG , MVT::f64, Custom);
578 setOperationAction(ISD::FNEG , MVT::f32, Custom);
580 // Use ANDPD and ORPD to simulate FCOPYSIGN.
581 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
582 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
584 // Lower this to FGETSIGNx86 plus an AND.
585 setOperationAction(ISD::FGETSIGN, MVT::i64, Custom);
586 setOperationAction(ISD::FGETSIGN, MVT::i32, Custom);
588 // We don't support sin/cos/fmod
589 setOperationAction(ISD::FSIN , MVT::f64, Expand);
590 setOperationAction(ISD::FCOS , MVT::f64, Expand);
591 setOperationAction(ISD::FSIN , MVT::f32, Expand);
592 setOperationAction(ISD::FCOS , MVT::f32, Expand);
594 // Expand FP immediates into loads from the stack, except for the special
596 addLegalFPImmediate(APFloat(+0.0)); // xorpd
597 addLegalFPImmediate(APFloat(+0.0f)); // xorps
598 } else if (!TM.Options.UseSoftFloat && X86ScalarSSEf32) {
599 // Use SSE for f32, x87 for f64.
600 // Set up the FP register classes.
601 addRegisterClass(MVT::f32, X86::FR32RegisterClass);
602 addRegisterClass(MVT::f64, X86::RFP64RegisterClass);
604 // Use ANDPS to simulate FABS.
605 setOperationAction(ISD::FABS , MVT::f32, Custom);
607 // Use XORP to simulate FNEG.
608 setOperationAction(ISD::FNEG , MVT::f32, Custom);
610 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
612 // Use ANDPS and ORPS to simulate FCOPYSIGN.
613 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
614 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
616 // We don't support sin/cos/fmod
617 setOperationAction(ISD::FSIN , MVT::f32, Expand);
618 setOperationAction(ISD::FCOS , MVT::f32, Expand);
620 // Special cases we handle for FP constants.
621 addLegalFPImmediate(APFloat(+0.0f)); // xorps
622 addLegalFPImmediate(APFloat(+0.0)); // FLD0
623 addLegalFPImmediate(APFloat(+1.0)); // FLD1
624 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
625 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
627 if (!TM.Options.UnsafeFPMath) {
628 setOperationAction(ISD::FSIN , MVT::f64 , Expand);
629 setOperationAction(ISD::FCOS , MVT::f64 , Expand);
631 } else if (!TM.Options.UseSoftFloat) {
632 // f32 and f64 in x87.
633 // Set up the FP register classes.
634 addRegisterClass(MVT::f64, X86::RFP64RegisterClass);
635 addRegisterClass(MVT::f32, X86::RFP32RegisterClass);
637 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
638 setOperationAction(ISD::UNDEF, MVT::f32, Expand);
639 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
640 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
642 if (!TM.Options.UnsafeFPMath) {
643 setOperationAction(ISD::FSIN , MVT::f64 , Expand);
644 setOperationAction(ISD::FCOS , MVT::f64 , Expand);
646 addLegalFPImmediate(APFloat(+0.0)); // FLD0
647 addLegalFPImmediate(APFloat(+1.0)); // FLD1
648 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
649 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
650 addLegalFPImmediate(APFloat(+0.0f)); // FLD0
651 addLegalFPImmediate(APFloat(+1.0f)); // FLD1
652 addLegalFPImmediate(APFloat(-0.0f)); // FLD0/FCHS
653 addLegalFPImmediate(APFloat(-1.0f)); // FLD1/FCHS
656 // We don't support FMA.
657 setOperationAction(ISD::FMA, MVT::f64, Expand);
658 setOperationAction(ISD::FMA, MVT::f32, Expand);
660 // Long double always uses X87.
661 if (!TM.Options.UseSoftFloat) {
662 addRegisterClass(MVT::f80, X86::RFP80RegisterClass);
663 setOperationAction(ISD::UNDEF, MVT::f80, Expand);
664 setOperationAction(ISD::FCOPYSIGN, MVT::f80, Expand);
666 APFloat TmpFlt = APFloat::getZero(APFloat::x87DoubleExtended);
667 addLegalFPImmediate(TmpFlt); // FLD0
669 addLegalFPImmediate(TmpFlt); // FLD0/FCHS
672 APFloat TmpFlt2(+1.0);
673 TmpFlt2.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven,
675 addLegalFPImmediate(TmpFlt2); // FLD1
676 TmpFlt2.changeSign();
677 addLegalFPImmediate(TmpFlt2); // FLD1/FCHS
680 if (!TM.Options.UnsafeFPMath) {
681 setOperationAction(ISD::FSIN , MVT::f80 , Expand);
682 setOperationAction(ISD::FCOS , MVT::f80 , Expand);
685 setOperationAction(ISD::FFLOOR, MVT::f80, Expand);
686 setOperationAction(ISD::FCEIL, MVT::f80, Expand);
687 setOperationAction(ISD::FTRUNC, MVT::f80, Expand);
688 setOperationAction(ISD::FRINT, MVT::f80, Expand);
689 setOperationAction(ISD::FNEARBYINT, MVT::f80, Expand);
690 setOperationAction(ISD::FMA, MVT::f80, Expand);
693 // Always use a library call for pow.
694 setOperationAction(ISD::FPOW , MVT::f32 , Expand);
695 setOperationAction(ISD::FPOW , MVT::f64 , Expand);
696 setOperationAction(ISD::FPOW , MVT::f80 , Expand);
698 setOperationAction(ISD::FLOG, MVT::f80, Expand);
699 setOperationAction(ISD::FLOG2, MVT::f80, Expand);
700 setOperationAction(ISD::FLOG10, MVT::f80, Expand);
701 setOperationAction(ISD::FEXP, MVT::f80, Expand);
702 setOperationAction(ISD::FEXP2, MVT::f80, Expand);
704 // First set operation action for all vector types to either promote
705 // (for widening) or expand (for scalarization). Then we will selectively
706 // turn on ones that can be effectively codegen'd.
707 for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
708 VT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++VT) {
709 setOperationAction(ISD::ADD , (MVT::SimpleValueType)VT, Expand);
710 setOperationAction(ISD::SUB , (MVT::SimpleValueType)VT, Expand);
711 setOperationAction(ISD::FADD, (MVT::SimpleValueType)VT, Expand);
712 setOperationAction(ISD::FNEG, (MVT::SimpleValueType)VT, Expand);
713 setOperationAction(ISD::FSUB, (MVT::SimpleValueType)VT, Expand);
714 setOperationAction(ISD::MUL , (MVT::SimpleValueType)VT, Expand);
715 setOperationAction(ISD::FMUL, (MVT::SimpleValueType)VT, Expand);
716 setOperationAction(ISD::SDIV, (MVT::SimpleValueType)VT, Expand);
717 setOperationAction(ISD::UDIV, (MVT::SimpleValueType)VT, Expand);
718 setOperationAction(ISD::FDIV, (MVT::SimpleValueType)VT, Expand);
719 setOperationAction(ISD::SREM, (MVT::SimpleValueType)VT, Expand);
720 setOperationAction(ISD::UREM, (MVT::SimpleValueType)VT, Expand);
721 setOperationAction(ISD::LOAD, (MVT::SimpleValueType)VT, Expand);
722 setOperationAction(ISD::VECTOR_SHUFFLE, (MVT::SimpleValueType)VT, Expand);
723 setOperationAction(ISD::EXTRACT_VECTOR_ELT,(MVT::SimpleValueType)VT,Expand);
724 setOperationAction(ISD::INSERT_VECTOR_ELT,(MVT::SimpleValueType)VT, Expand);
725 setOperationAction(ISD::EXTRACT_SUBVECTOR,(MVT::SimpleValueType)VT,Expand);
726 setOperationAction(ISD::INSERT_SUBVECTOR,(MVT::SimpleValueType)VT,Expand);
727 setOperationAction(ISD::FABS, (MVT::SimpleValueType)VT, Expand);
728 setOperationAction(ISD::FSIN, (MVT::SimpleValueType)VT, Expand);
729 setOperationAction(ISD::FCOS, (MVT::SimpleValueType)VT, Expand);
730 setOperationAction(ISD::FREM, (MVT::SimpleValueType)VT, Expand);
731 setOperationAction(ISD::FPOWI, (MVT::SimpleValueType)VT, Expand);
732 setOperationAction(ISD::FSQRT, (MVT::SimpleValueType)VT, Expand);
733 setOperationAction(ISD::FCOPYSIGN, (MVT::SimpleValueType)VT, Expand);
734 setOperationAction(ISD::SMUL_LOHI, (MVT::SimpleValueType)VT, Expand);
735 setOperationAction(ISD::UMUL_LOHI, (MVT::SimpleValueType)VT, Expand);
736 setOperationAction(ISD::SDIVREM, (MVT::SimpleValueType)VT, Expand);
737 setOperationAction(ISD::UDIVREM, (MVT::SimpleValueType)VT, Expand);
738 setOperationAction(ISD::FPOW, (MVT::SimpleValueType)VT, Expand);
739 setOperationAction(ISD::CTPOP, (MVT::SimpleValueType)VT, Expand);
740 setOperationAction(ISD::CTTZ, (MVT::SimpleValueType)VT, Expand);
741 setOperationAction(ISD::CTTZ_ZERO_UNDEF, (MVT::SimpleValueType)VT, Expand);
742 setOperationAction(ISD::CTLZ, (MVT::SimpleValueType)VT, Expand);
743 setOperationAction(ISD::CTLZ_ZERO_UNDEF, (MVT::SimpleValueType)VT, Expand);
744 setOperationAction(ISD::SHL, (MVT::SimpleValueType)VT, Expand);
745 setOperationAction(ISD::SRA, (MVT::SimpleValueType)VT, Expand);
746 setOperationAction(ISD::SRL, (MVT::SimpleValueType)VT, Expand);
747 setOperationAction(ISD::ROTL, (MVT::SimpleValueType)VT, Expand);
748 setOperationAction(ISD::ROTR, (MVT::SimpleValueType)VT, Expand);
749 setOperationAction(ISD::BSWAP, (MVT::SimpleValueType)VT, Expand);
750 setOperationAction(ISD::SETCC, (MVT::SimpleValueType)VT, Expand);
751 setOperationAction(ISD::FLOG, (MVT::SimpleValueType)VT, Expand);
752 setOperationAction(ISD::FLOG2, (MVT::SimpleValueType)VT, Expand);
753 setOperationAction(ISD::FLOG10, (MVT::SimpleValueType)VT, Expand);
754 setOperationAction(ISD::FEXP, (MVT::SimpleValueType)VT, Expand);
755 setOperationAction(ISD::FEXP2, (MVT::SimpleValueType)VT, Expand);
756 setOperationAction(ISD::FP_TO_UINT, (MVT::SimpleValueType)VT, Expand);
757 setOperationAction(ISD::FP_TO_SINT, (MVT::SimpleValueType)VT, Expand);
758 setOperationAction(ISD::UINT_TO_FP, (MVT::SimpleValueType)VT, Expand);
759 setOperationAction(ISD::SINT_TO_FP, (MVT::SimpleValueType)VT, Expand);
760 setOperationAction(ISD::SIGN_EXTEND_INREG, (MVT::SimpleValueType)VT,Expand);
761 setOperationAction(ISD::TRUNCATE, (MVT::SimpleValueType)VT, Expand);
762 setOperationAction(ISD::SIGN_EXTEND, (MVT::SimpleValueType)VT, Expand);
763 setOperationAction(ISD::ZERO_EXTEND, (MVT::SimpleValueType)VT, Expand);
764 setOperationAction(ISD::ANY_EXTEND, (MVT::SimpleValueType)VT, Expand);
765 setOperationAction(ISD::VSELECT, (MVT::SimpleValueType)VT, Expand);
766 for (unsigned InnerVT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
767 InnerVT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++InnerVT)
768 setTruncStoreAction((MVT::SimpleValueType)VT,
769 (MVT::SimpleValueType)InnerVT, Expand);
770 setLoadExtAction(ISD::SEXTLOAD, (MVT::SimpleValueType)VT, Expand);
771 setLoadExtAction(ISD::ZEXTLOAD, (MVT::SimpleValueType)VT, Expand);
772 setLoadExtAction(ISD::EXTLOAD, (MVT::SimpleValueType)VT, Expand);
775 // FIXME: In order to prevent SSE instructions being expanded to MMX ones
776 // with -msoft-float, disable use of MMX as well.
777 if (!TM.Options.UseSoftFloat && Subtarget->hasMMX()) {
778 addRegisterClass(MVT::x86mmx, X86::VR64RegisterClass);
779 // No operations on x86mmx supported, everything uses intrinsics.
782 // MMX-sized vectors (other than x86mmx) are expected to be expanded
783 // into smaller operations.
784 setOperationAction(ISD::MULHS, MVT::v8i8, Expand);
785 setOperationAction(ISD::MULHS, MVT::v4i16, Expand);
786 setOperationAction(ISD::MULHS, MVT::v2i32, Expand);
787 setOperationAction(ISD::MULHS, MVT::v1i64, Expand);
788 setOperationAction(ISD::AND, MVT::v8i8, Expand);
789 setOperationAction(ISD::AND, MVT::v4i16, Expand);
790 setOperationAction(ISD::AND, MVT::v2i32, Expand);
791 setOperationAction(ISD::AND, MVT::v1i64, Expand);
792 setOperationAction(ISD::OR, MVT::v8i8, Expand);
793 setOperationAction(ISD::OR, MVT::v4i16, Expand);
794 setOperationAction(ISD::OR, MVT::v2i32, Expand);
795 setOperationAction(ISD::OR, MVT::v1i64, Expand);
796 setOperationAction(ISD::XOR, MVT::v8i8, Expand);
797 setOperationAction(ISD::XOR, MVT::v4i16, Expand);
798 setOperationAction(ISD::XOR, MVT::v2i32, Expand);
799 setOperationAction(ISD::XOR, MVT::v1i64, Expand);
800 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i8, Expand);
801 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i16, Expand);
802 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v2i32, Expand);
803 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v1i64, Expand);
804 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v1i64, Expand);
805 setOperationAction(ISD::SELECT, MVT::v8i8, Expand);
806 setOperationAction(ISD::SELECT, MVT::v4i16, Expand);
807 setOperationAction(ISD::SELECT, MVT::v2i32, Expand);
808 setOperationAction(ISD::SELECT, MVT::v1i64, Expand);
809 setOperationAction(ISD::BITCAST, MVT::v8i8, Expand);
810 setOperationAction(ISD::BITCAST, MVT::v4i16, Expand);
811 setOperationAction(ISD::BITCAST, MVT::v2i32, Expand);
812 setOperationAction(ISD::BITCAST, MVT::v1i64, Expand);
814 if (!TM.Options.UseSoftFloat && Subtarget->hasSSE1()) {
815 addRegisterClass(MVT::v4f32, X86::VR128RegisterClass);
817 setOperationAction(ISD::FADD, MVT::v4f32, Legal);
818 setOperationAction(ISD::FSUB, MVT::v4f32, Legal);
819 setOperationAction(ISD::FMUL, MVT::v4f32, Legal);
820 setOperationAction(ISD::FDIV, MVT::v4f32, Legal);
821 setOperationAction(ISD::FSQRT, MVT::v4f32, Legal);
822 setOperationAction(ISD::FNEG, MVT::v4f32, Custom);
823 setOperationAction(ISD::LOAD, MVT::v4f32, Legal);
824 setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
825 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4f32, Custom);
826 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
827 setOperationAction(ISD::SELECT, MVT::v4f32, Custom);
828 setOperationAction(ISD::SETCC, MVT::v4f32, Custom);
831 if (!TM.Options.UseSoftFloat && Subtarget->hasSSE2()) {
832 addRegisterClass(MVT::v2f64, X86::VR128RegisterClass);
834 // FIXME: Unfortunately -soft-float and -no-implicit-float means XMM
835 // registers cannot be used even for integer operations.
836 addRegisterClass(MVT::v16i8, X86::VR128RegisterClass);
837 addRegisterClass(MVT::v8i16, X86::VR128RegisterClass);
838 addRegisterClass(MVT::v4i32, X86::VR128RegisterClass);
839 addRegisterClass(MVT::v2i64, X86::VR128RegisterClass);
841 setOperationAction(ISD::ADD, MVT::v16i8, Legal);
842 setOperationAction(ISD::ADD, MVT::v8i16, Legal);
843 setOperationAction(ISD::ADD, MVT::v4i32, Legal);
844 setOperationAction(ISD::ADD, MVT::v2i64, Legal);
845 setOperationAction(ISD::MUL, MVT::v2i64, Custom);
846 setOperationAction(ISD::SUB, MVT::v16i8, Legal);
847 setOperationAction(ISD::SUB, MVT::v8i16, Legal);
848 setOperationAction(ISD::SUB, MVT::v4i32, Legal);
849 setOperationAction(ISD::SUB, MVT::v2i64, Legal);
850 setOperationAction(ISD::MUL, MVT::v8i16, Legal);
851 setOperationAction(ISD::FADD, MVT::v2f64, Legal);
852 setOperationAction(ISD::FSUB, MVT::v2f64, Legal);
853 setOperationAction(ISD::FMUL, MVT::v2f64, Legal);
854 setOperationAction(ISD::FDIV, MVT::v2f64, Legal);
855 setOperationAction(ISD::FSQRT, MVT::v2f64, Legal);
856 setOperationAction(ISD::FNEG, MVT::v2f64, Custom);
858 setOperationAction(ISD::SETCC, MVT::v2i64, Custom);
859 setOperationAction(ISD::SETCC, MVT::v16i8, Custom);
860 setOperationAction(ISD::SETCC, MVT::v8i16, Custom);
861 setOperationAction(ISD::SETCC, MVT::v4i32, Custom);
863 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16i8, Custom);
864 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i16, Custom);
865 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
866 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
867 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
869 setOperationAction(ISD::CONCAT_VECTORS, MVT::v2f64, Custom);
870 setOperationAction(ISD::CONCAT_VECTORS, MVT::v2i64, Custom);
871 setOperationAction(ISD::CONCAT_VECTORS, MVT::v16i8, Custom);
872 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i16, Custom);
873 setOperationAction(ISD::CONCAT_VECTORS, MVT::v4i32, Custom);
875 // Custom lower build_vector, vector_shuffle, and extract_vector_elt.
876 for (unsigned i = (unsigned)MVT::v16i8; i != (unsigned)MVT::v2i64; ++i) {
877 EVT VT = (MVT::SimpleValueType)i;
878 // Do not attempt to custom lower non-power-of-2 vectors
879 if (!isPowerOf2_32(VT.getVectorNumElements()))
881 // Do not attempt to custom lower non-128-bit vectors
882 if (!VT.is128BitVector())
884 setOperationAction(ISD::BUILD_VECTOR,
885 VT.getSimpleVT().SimpleTy, Custom);
886 setOperationAction(ISD::VECTOR_SHUFFLE,
887 VT.getSimpleVT().SimpleTy, Custom);
888 setOperationAction(ISD::EXTRACT_VECTOR_ELT,
889 VT.getSimpleVT().SimpleTy, Custom);
892 setOperationAction(ISD::BUILD_VECTOR, MVT::v2f64, Custom);
893 setOperationAction(ISD::BUILD_VECTOR, MVT::v2i64, Custom);
894 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Custom);
895 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Custom);
896 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2f64, Custom);
897 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Custom);
899 if (Subtarget->is64Bit()) {
900 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Custom);
901 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
904 // Promote v16i8, v8i16, v4i32 load, select, and, or, xor to v2i64.
905 for (unsigned i = (unsigned)MVT::v16i8; i != (unsigned)MVT::v2i64; i++) {
906 MVT::SimpleValueType SVT = (MVT::SimpleValueType)i;
909 // Do not attempt to promote non-128-bit vectors
910 if (!VT.is128BitVector())
913 setOperationAction(ISD::AND, SVT, Promote);
914 AddPromotedToType (ISD::AND, SVT, MVT::v2i64);
915 setOperationAction(ISD::OR, SVT, Promote);
916 AddPromotedToType (ISD::OR, SVT, MVT::v2i64);
917 setOperationAction(ISD::XOR, SVT, Promote);
918 AddPromotedToType (ISD::XOR, SVT, MVT::v2i64);
919 setOperationAction(ISD::LOAD, SVT, Promote);
920 AddPromotedToType (ISD::LOAD, SVT, MVT::v2i64);
921 setOperationAction(ISD::SELECT, SVT, Promote);
922 AddPromotedToType (ISD::SELECT, SVT, MVT::v2i64);
925 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
927 // Custom lower v2i64 and v2f64 selects.
928 setOperationAction(ISD::LOAD, MVT::v2f64, Legal);
929 setOperationAction(ISD::LOAD, MVT::v2i64, Legal);
930 setOperationAction(ISD::SELECT, MVT::v2f64, Custom);
931 setOperationAction(ISD::SELECT, MVT::v2i64, Custom);
933 setOperationAction(ISD::FP_TO_SINT, MVT::v4i32, Legal);
934 setOperationAction(ISD::SINT_TO_FP, MVT::v4i32, Legal);
937 if (Subtarget->hasSSE41()) {
938 setOperationAction(ISD::FFLOOR, MVT::f32, Legal);
939 setOperationAction(ISD::FCEIL, MVT::f32, Legal);
940 setOperationAction(ISD::FTRUNC, MVT::f32, Legal);
941 setOperationAction(ISD::FRINT, MVT::f32, Legal);
942 setOperationAction(ISD::FNEARBYINT, MVT::f32, Legal);
943 setOperationAction(ISD::FFLOOR, MVT::f64, Legal);
944 setOperationAction(ISD::FCEIL, MVT::f64, Legal);
945 setOperationAction(ISD::FTRUNC, MVT::f64, Legal);
946 setOperationAction(ISD::FRINT, MVT::f64, Legal);
947 setOperationAction(ISD::FNEARBYINT, MVT::f64, Legal);
949 // FIXME: Do we need to handle scalar-to-vector here?
950 setOperationAction(ISD::MUL, MVT::v4i32, Legal);
952 setOperationAction(ISD::VSELECT, MVT::v2f64, Legal);
953 setOperationAction(ISD::VSELECT, MVT::v2i64, Legal);
954 setOperationAction(ISD::VSELECT, MVT::v16i8, Legal);
955 setOperationAction(ISD::VSELECT, MVT::v4i32, Legal);
956 setOperationAction(ISD::VSELECT, MVT::v4f32, Legal);
958 // i8 and i16 vectors are custom , because the source register and source
959 // source memory operand types are not the same width. f32 vectors are
960 // custom since the immediate controlling the insert encodes additional
962 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i8, Custom);
963 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
964 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
965 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
967 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v16i8, Custom);
968 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v8i16, Custom);
969 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4i32, Custom);
970 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
972 // FIXME: these should be Legal but thats only for the case where
973 // the index is constant. For now custom expand to deal with that.
974 if (Subtarget->is64Bit()) {
975 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Custom);
976 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
980 if (Subtarget->hasSSE2()) {
981 setOperationAction(ISD::SRL, MVT::v8i16, Custom);
982 setOperationAction(ISD::SRL, MVT::v16i8, Custom);
984 setOperationAction(ISD::SHL, MVT::v8i16, Custom);
985 setOperationAction(ISD::SHL, MVT::v16i8, Custom);
987 setOperationAction(ISD::SRA, MVT::v8i16, Custom);
988 setOperationAction(ISD::SRA, MVT::v16i8, Custom);
990 if (Subtarget->hasAVX2()) {
991 setOperationAction(ISD::SRL, MVT::v2i64, Legal);
992 setOperationAction(ISD::SRL, MVT::v4i32, Legal);
994 setOperationAction(ISD::SHL, MVT::v2i64, Legal);
995 setOperationAction(ISD::SHL, MVT::v4i32, Legal);
997 setOperationAction(ISD::SRA, MVT::v4i32, Legal);
999 setOperationAction(ISD::SRL, MVT::v2i64, Custom);
1000 setOperationAction(ISD::SRL, MVT::v4i32, Custom);
1002 setOperationAction(ISD::SHL, MVT::v2i64, Custom);
1003 setOperationAction(ISD::SHL, MVT::v4i32, Custom);
1005 setOperationAction(ISD::SRA, MVT::v4i32, Custom);
1009 if (Subtarget->hasSSE42())
1010 setOperationAction(ISD::SETCC, MVT::v2i64, Custom);
1012 if (!TM.Options.UseSoftFloat && Subtarget->hasAVX()) {
1013 addRegisterClass(MVT::v32i8, X86::VR256RegisterClass);
1014 addRegisterClass(MVT::v16i16, X86::VR256RegisterClass);
1015 addRegisterClass(MVT::v8i32, X86::VR256RegisterClass);
1016 addRegisterClass(MVT::v8f32, X86::VR256RegisterClass);
1017 addRegisterClass(MVT::v4i64, X86::VR256RegisterClass);
1018 addRegisterClass(MVT::v4f64, X86::VR256RegisterClass);
1020 setOperationAction(ISD::LOAD, MVT::v8f32, Legal);
1021 setOperationAction(ISD::LOAD, MVT::v4f64, Legal);
1022 setOperationAction(ISD::LOAD, MVT::v4i64, Legal);
1024 setOperationAction(ISD::FADD, MVT::v8f32, Legal);
1025 setOperationAction(ISD::FSUB, MVT::v8f32, Legal);
1026 setOperationAction(ISD::FMUL, MVT::v8f32, Legal);
1027 setOperationAction(ISD::FDIV, MVT::v8f32, Legal);
1028 setOperationAction(ISD::FSQRT, MVT::v8f32, Legal);
1029 setOperationAction(ISD::FNEG, MVT::v8f32, Custom);
1031 setOperationAction(ISD::FADD, MVT::v4f64, Legal);
1032 setOperationAction(ISD::FSUB, MVT::v4f64, Legal);
1033 setOperationAction(ISD::FMUL, MVT::v4f64, Legal);
1034 setOperationAction(ISD::FDIV, MVT::v4f64, Legal);
1035 setOperationAction(ISD::FSQRT, MVT::v4f64, Legal);
1036 setOperationAction(ISD::FNEG, MVT::v4f64, Custom);
1038 setOperationAction(ISD::FP_TO_SINT, MVT::v8i32, Legal);
1039 setOperationAction(ISD::SINT_TO_FP, MVT::v8i32, Legal);
1040 setOperationAction(ISD::FP_ROUND, MVT::v4f32, Legal);
1042 setOperationAction(ISD::CONCAT_VECTORS, MVT::v4f64, Custom);
1043 setOperationAction(ISD::CONCAT_VECTORS, MVT::v4i64, Custom);
1044 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8f32, Custom);
1045 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i32, Custom);
1046 setOperationAction(ISD::CONCAT_VECTORS, MVT::v32i8, Custom);
1047 setOperationAction(ISD::CONCAT_VECTORS, MVT::v16i16, Custom);
1049 setOperationAction(ISD::SRL, MVT::v16i16, Custom);
1050 setOperationAction(ISD::SRL, MVT::v32i8, Custom);
1052 setOperationAction(ISD::SHL, MVT::v16i16, Custom);
1053 setOperationAction(ISD::SHL, MVT::v32i8, Custom);
1055 setOperationAction(ISD::SRA, MVT::v16i16, Custom);
1056 setOperationAction(ISD::SRA, MVT::v32i8, Custom);
1058 setOperationAction(ISD::SETCC, MVT::v32i8, Custom);
1059 setOperationAction(ISD::SETCC, MVT::v16i16, Custom);
1060 setOperationAction(ISD::SETCC, MVT::v8i32, Custom);
1061 setOperationAction(ISD::SETCC, MVT::v4i64, Custom);
1063 setOperationAction(ISD::SELECT, MVT::v4f64, Custom);
1064 setOperationAction(ISD::SELECT, MVT::v4i64, Custom);
1065 setOperationAction(ISD::SELECT, MVT::v8f32, Custom);
1067 setOperationAction(ISD::VSELECT, MVT::v4f64, Legal);
1068 setOperationAction(ISD::VSELECT, MVT::v4i64, Legal);
1069 setOperationAction(ISD::VSELECT, MVT::v8i32, Legal);
1070 setOperationAction(ISD::VSELECT, MVT::v8f32, Legal);
1072 if (Subtarget->hasAVX2()) {
1073 setOperationAction(ISD::ADD, MVT::v4i64, Legal);
1074 setOperationAction(ISD::ADD, MVT::v8i32, Legal);
1075 setOperationAction(ISD::ADD, MVT::v16i16, Legal);
1076 setOperationAction(ISD::ADD, MVT::v32i8, Legal);
1078 setOperationAction(ISD::SUB, MVT::v4i64, Legal);
1079 setOperationAction(ISD::SUB, MVT::v8i32, Legal);
1080 setOperationAction(ISD::SUB, MVT::v16i16, Legal);
1081 setOperationAction(ISD::SUB, MVT::v32i8, Legal);
1083 setOperationAction(ISD::MUL, MVT::v4i64, Custom);
1084 setOperationAction(ISD::MUL, MVT::v8i32, Legal);
1085 setOperationAction(ISD::MUL, MVT::v16i16, Legal);
1086 // Don't lower v32i8 because there is no 128-bit byte mul
1088 setOperationAction(ISD::VSELECT, MVT::v32i8, Legal);
1090 setOperationAction(ISD::SRL, MVT::v4i64, Legal);
1091 setOperationAction(ISD::SRL, MVT::v8i32, Legal);
1093 setOperationAction(ISD::SHL, MVT::v4i64, Legal);
1094 setOperationAction(ISD::SHL, MVT::v8i32, Legal);
1096 setOperationAction(ISD::SRA, MVT::v8i32, Legal);
1098 setOperationAction(ISD::ADD, MVT::v4i64, Custom);
1099 setOperationAction(ISD::ADD, MVT::v8i32, Custom);
1100 setOperationAction(ISD::ADD, MVT::v16i16, Custom);
1101 setOperationAction(ISD::ADD, MVT::v32i8, Custom);
1103 setOperationAction(ISD::SUB, MVT::v4i64, Custom);
1104 setOperationAction(ISD::SUB, MVT::v8i32, Custom);
1105 setOperationAction(ISD::SUB, MVT::v16i16, Custom);
1106 setOperationAction(ISD::SUB, MVT::v32i8, Custom);
1108 setOperationAction(ISD::MUL, MVT::v4i64, Custom);
1109 setOperationAction(ISD::MUL, MVT::v8i32, Custom);
1110 setOperationAction(ISD::MUL, MVT::v16i16, Custom);
1111 // Don't lower v32i8 because there is no 128-bit byte mul
1113 setOperationAction(ISD::SRL, MVT::v4i64, Custom);
1114 setOperationAction(ISD::SRL, MVT::v8i32, Custom);
1116 setOperationAction(ISD::SHL, MVT::v4i64, Custom);
1117 setOperationAction(ISD::SHL, MVT::v8i32, Custom);
1119 setOperationAction(ISD::SRA, MVT::v8i32, Custom);
1122 // Custom lower several nodes for 256-bit types.
1123 for (unsigned i = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
1124 i <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++i) {
1125 MVT::SimpleValueType SVT = (MVT::SimpleValueType)i;
1128 // Extract subvector is special because the value type
1129 // (result) is 128-bit but the source is 256-bit wide.
1130 if (VT.is128BitVector())
1131 setOperationAction(ISD::EXTRACT_SUBVECTOR, SVT, Custom);
1133 // Do not attempt to custom lower other non-256-bit vectors
1134 if (!VT.is256BitVector())
1137 setOperationAction(ISD::BUILD_VECTOR, SVT, Custom);
1138 setOperationAction(ISD::VECTOR_SHUFFLE, SVT, Custom);
1139 setOperationAction(ISD::INSERT_VECTOR_ELT, SVT, Custom);
1140 setOperationAction(ISD::EXTRACT_VECTOR_ELT, SVT, Custom);
1141 setOperationAction(ISD::SCALAR_TO_VECTOR, SVT, Custom);
1142 setOperationAction(ISD::INSERT_SUBVECTOR, SVT, Custom);
1145 // Promote v32i8, v16i16, v8i32 select, and, or, xor to v4i64.
1146 for (unsigned i = (unsigned)MVT::v32i8; i != (unsigned)MVT::v4i64; ++i) {
1147 MVT::SimpleValueType SVT = (MVT::SimpleValueType)i;
1150 // Do not attempt to promote non-256-bit vectors
1151 if (!VT.is256BitVector())
1154 setOperationAction(ISD::AND, SVT, Promote);
1155 AddPromotedToType (ISD::AND, SVT, MVT::v4i64);
1156 setOperationAction(ISD::OR, SVT, Promote);
1157 AddPromotedToType (ISD::OR, SVT, MVT::v4i64);
1158 setOperationAction(ISD::XOR, SVT, Promote);
1159 AddPromotedToType (ISD::XOR, SVT, MVT::v4i64);
1160 setOperationAction(ISD::LOAD, SVT, Promote);
1161 AddPromotedToType (ISD::LOAD, SVT, MVT::v4i64);
1162 setOperationAction(ISD::SELECT, SVT, Promote);
1163 AddPromotedToType (ISD::SELECT, SVT, MVT::v4i64);
1167 // SIGN_EXTEND_INREGs are evaluated by the extend type. Handle the expansion
1168 // of this type with custom code.
1169 for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
1170 VT != (unsigned)MVT::LAST_VECTOR_VALUETYPE; VT++) {
1171 setOperationAction(ISD::SIGN_EXTEND_INREG, (MVT::SimpleValueType)VT,
1175 // We want to custom lower some of our intrinsics.
1176 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
1179 // Only custom-lower 64-bit SADDO and friends on 64-bit because we don't
1180 // handle type legalization for these operations here.
1182 // FIXME: We really should do custom legalization for addition and
1183 // subtraction on x86-32 once PR3203 is fixed. We really can't do much better
1184 // than generic legalization for 64-bit multiplication-with-overflow, though.
1185 for (unsigned i = 0, e = 3+Subtarget->is64Bit(); i != e; ++i) {
1186 // Add/Sub/Mul with overflow operations are custom lowered.
1188 setOperationAction(ISD::SADDO, VT, Custom);
1189 setOperationAction(ISD::UADDO, VT, Custom);
1190 setOperationAction(ISD::SSUBO, VT, Custom);
1191 setOperationAction(ISD::USUBO, VT, Custom);
1192 setOperationAction(ISD::SMULO, VT, Custom);
1193 setOperationAction(ISD::UMULO, VT, Custom);
1196 // There are no 8-bit 3-address imul/mul instructions
1197 setOperationAction(ISD::SMULO, MVT::i8, Expand);
1198 setOperationAction(ISD::UMULO, MVT::i8, Expand);
1200 if (!Subtarget->is64Bit()) {
1201 // These libcalls are not available in 32-bit.
1202 setLibcallName(RTLIB::SHL_I128, 0);
1203 setLibcallName(RTLIB::SRL_I128, 0);
1204 setLibcallName(RTLIB::SRA_I128, 0);
1207 // We have target-specific dag combine patterns for the following nodes:
1208 setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
1209 setTargetDAGCombine(ISD::EXTRACT_VECTOR_ELT);
1210 setTargetDAGCombine(ISD::VSELECT);
1211 setTargetDAGCombine(ISD::SELECT);
1212 setTargetDAGCombine(ISD::SHL);
1213 setTargetDAGCombine(ISD::SRA);
1214 setTargetDAGCombine(ISD::SRL);
1215 setTargetDAGCombine(ISD::OR);
1216 setTargetDAGCombine(ISD::AND);
1217 setTargetDAGCombine(ISD::ADD);
1218 setTargetDAGCombine(ISD::FADD);
1219 setTargetDAGCombine(ISD::FSUB);
1220 setTargetDAGCombine(ISD::SUB);
1221 setTargetDAGCombine(ISD::LOAD);
1222 setTargetDAGCombine(ISD::STORE);
1223 setTargetDAGCombine(ISD::ZERO_EXTEND);
1224 setTargetDAGCombine(ISD::SIGN_EXTEND);
1225 setTargetDAGCombine(ISD::TRUNCATE);
1226 setTargetDAGCombine(ISD::SINT_TO_FP);
1227 if (Subtarget->is64Bit())
1228 setTargetDAGCombine(ISD::MUL);
1229 if (Subtarget->hasBMI())
1230 setTargetDAGCombine(ISD::XOR);
1232 computeRegisterProperties();
1234 // On Darwin, -Os means optimize for size without hurting performance,
1235 // do not reduce the limit.
1236 maxStoresPerMemset = 16; // For @llvm.memset -> sequence of stores
1237 maxStoresPerMemsetOptSize = Subtarget->isTargetDarwin() ? 16 : 8;
1238 maxStoresPerMemcpy = 8; // For @llvm.memcpy -> sequence of stores
1239 maxStoresPerMemcpyOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
1240 maxStoresPerMemmove = 8; // For @llvm.memmove -> sequence of stores
1241 maxStoresPerMemmoveOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
1242 setPrefLoopAlignment(4); // 2^4 bytes.
1243 benefitFromCodePlacementOpt = true;
1245 setPrefFunctionAlignment(4); // 2^4 bytes.
1249 EVT X86TargetLowering::getSetCCResultType(EVT VT) const {
1250 if (!VT.isVector()) return MVT::i8;
1251 return VT.changeVectorElementTypeToInteger();
1255 /// getMaxByValAlign - Helper for getByValTypeAlignment to determine
1256 /// the desired ByVal argument alignment.
1257 static void getMaxByValAlign(Type *Ty, unsigned &MaxAlign) {
1260 if (VectorType *VTy = dyn_cast<VectorType>(Ty)) {
1261 if (VTy->getBitWidth() == 128)
1263 } else if (ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
1264 unsigned EltAlign = 0;
1265 getMaxByValAlign(ATy->getElementType(), EltAlign);
1266 if (EltAlign > MaxAlign)
1267 MaxAlign = EltAlign;
1268 } else if (StructType *STy = dyn_cast<StructType>(Ty)) {
1269 for (unsigned i = 0, e = STy->getNumElements(); i != e; ++i) {
1270 unsigned EltAlign = 0;
1271 getMaxByValAlign(STy->getElementType(i), EltAlign);
1272 if (EltAlign > MaxAlign)
1273 MaxAlign = EltAlign;
1281 /// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
1282 /// function arguments in the caller parameter area. For X86, aggregates
1283 /// that contain SSE vectors are placed at 16-byte boundaries while the rest
1284 /// are at 4-byte boundaries.
1285 unsigned X86TargetLowering::getByValTypeAlignment(Type *Ty) const {
1286 if (Subtarget->is64Bit()) {
1287 // Max of 8 and alignment of type.
1288 unsigned TyAlign = TD->getABITypeAlignment(Ty);
1295 if (Subtarget->hasSSE1())
1296 getMaxByValAlign(Ty, Align);
1300 /// getOptimalMemOpType - Returns the target specific optimal type for load
1301 /// and store operations as a result of memset, memcpy, and memmove
1302 /// lowering. If DstAlign is zero that means it's safe to destination
1303 /// alignment can satisfy any constraint. Similarly if SrcAlign is zero it
1304 /// means there isn't a need to check it against alignment requirement,
1305 /// probably because the source does not need to be loaded. If
1306 /// 'IsZeroVal' is true, that means it's safe to return a
1307 /// non-scalar-integer type, e.g. empty string source, constant, or loaded
1308 /// from memory. 'MemcpyStrSrc' indicates whether the memcpy source is
1309 /// constant so it does not need to be loaded.
1310 /// It returns EVT::Other if the type should be determined using generic
1311 /// target-independent logic.
1313 X86TargetLowering::getOptimalMemOpType(uint64_t Size,
1314 unsigned DstAlign, unsigned SrcAlign,
1317 MachineFunction &MF) const {
1318 // FIXME: This turns off use of xmm stores for memset/memcpy on targets like
1319 // linux. This is because the stack realignment code can't handle certain
1320 // cases like PR2962. This should be removed when PR2962 is fixed.
1321 const Function *F = MF.getFunction();
1323 !F->hasFnAttr(Attribute::NoImplicitFloat)) {
1325 (Subtarget->isUnalignedMemAccessFast() ||
1326 ((DstAlign == 0 || DstAlign >= 16) &&
1327 (SrcAlign == 0 || SrcAlign >= 16))) &&
1328 Subtarget->getStackAlignment() >= 16) {
1329 if (Subtarget->getStackAlignment() >= 32) {
1330 if (Subtarget->hasAVX2())
1332 if (Subtarget->hasAVX())
1335 if (Subtarget->hasSSE2())
1337 if (Subtarget->hasSSE1())
1339 } else if (!MemcpyStrSrc && Size >= 8 &&
1340 !Subtarget->is64Bit() &&
1341 Subtarget->getStackAlignment() >= 8 &&
1342 Subtarget->hasSSE2()) {
1343 // Do not use f64 to lower memcpy if source is string constant. It's
1344 // better to use i32 to avoid the loads.
1348 if (Subtarget->is64Bit() && Size >= 8)
1353 /// getJumpTableEncoding - Return the entry encoding for a jump table in the
1354 /// current function. The returned value is a member of the
1355 /// MachineJumpTableInfo::JTEntryKind enum.
1356 unsigned X86TargetLowering::getJumpTableEncoding() const {
1357 // In GOT pic mode, each entry in the jump table is emitted as a @GOTOFF
1359 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1360 Subtarget->isPICStyleGOT())
1361 return MachineJumpTableInfo::EK_Custom32;
1363 // Otherwise, use the normal jump table encoding heuristics.
1364 return TargetLowering::getJumpTableEncoding();
1368 X86TargetLowering::LowerCustomJumpTableEntry(const MachineJumpTableInfo *MJTI,
1369 const MachineBasicBlock *MBB,
1370 unsigned uid,MCContext &Ctx) const{
1371 assert(getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1372 Subtarget->isPICStyleGOT());
1373 // In 32-bit ELF systems, our jump table entries are formed with @GOTOFF
1375 return MCSymbolRefExpr::Create(MBB->getSymbol(),
1376 MCSymbolRefExpr::VK_GOTOFF, Ctx);
1379 /// getPICJumpTableRelocaBase - Returns relocation base for the given PIC
1381 SDValue X86TargetLowering::getPICJumpTableRelocBase(SDValue Table,
1382 SelectionDAG &DAG) const {
1383 if (!Subtarget->is64Bit())
1384 // This doesn't have DebugLoc associated with it, but is not really the
1385 // same as a Register.
1386 return DAG.getNode(X86ISD::GlobalBaseReg, DebugLoc(), getPointerTy());
1390 /// getPICJumpTableRelocBaseExpr - This returns the relocation base for the
1391 /// given PIC jumptable, the same as getPICJumpTableRelocBase, but as an
1393 const MCExpr *X86TargetLowering::
1394 getPICJumpTableRelocBaseExpr(const MachineFunction *MF, unsigned JTI,
1395 MCContext &Ctx) const {
1396 // X86-64 uses RIP relative addressing based on the jump table label.
1397 if (Subtarget->isPICStyleRIPRel())
1398 return TargetLowering::getPICJumpTableRelocBaseExpr(MF, JTI, Ctx);
1400 // Otherwise, the reference is relative to the PIC base.
1401 return MCSymbolRefExpr::Create(MF->getPICBaseSymbol(), Ctx);
1404 // FIXME: Why this routine is here? Move to RegInfo!
1405 std::pair<const TargetRegisterClass*, uint8_t>
1406 X86TargetLowering::findRepresentativeClass(EVT VT) const{
1407 const TargetRegisterClass *RRC = 0;
1409 switch (VT.getSimpleVT().SimpleTy) {
1411 return TargetLowering::findRepresentativeClass(VT);
1412 case MVT::i8: case MVT::i16: case MVT::i32: case MVT::i64:
1413 RRC = (Subtarget->is64Bit()
1414 ? X86::GR64RegisterClass : X86::GR32RegisterClass);
1417 RRC = X86::VR64RegisterClass;
1419 case MVT::f32: case MVT::f64:
1420 case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64:
1421 case MVT::v4f32: case MVT::v2f64:
1422 case MVT::v32i8: case MVT::v8i32: case MVT::v4i64: case MVT::v8f32:
1424 RRC = X86::VR128RegisterClass;
1427 return std::make_pair(RRC, Cost);
1430 bool X86TargetLowering::getStackCookieLocation(unsigned &AddressSpace,
1431 unsigned &Offset) const {
1432 if (!Subtarget->isTargetLinux())
1435 if (Subtarget->is64Bit()) {
1436 // %fs:0x28, unless we're using a Kernel code model, in which case it's %gs:
1438 if (getTargetMachine().getCodeModel() == CodeModel::Kernel)
1451 //===----------------------------------------------------------------------===//
1452 // Return Value Calling Convention Implementation
1453 //===----------------------------------------------------------------------===//
1455 #include "X86GenCallingConv.inc"
1458 X86TargetLowering::CanLowerReturn(CallingConv::ID CallConv,
1459 MachineFunction &MF, bool isVarArg,
1460 const SmallVectorImpl<ISD::OutputArg> &Outs,
1461 LLVMContext &Context) const {
1462 SmallVector<CCValAssign, 16> RVLocs;
1463 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
1465 return CCInfo.CheckReturn(Outs, RetCC_X86);
1469 X86TargetLowering::LowerReturn(SDValue Chain,
1470 CallingConv::ID CallConv, bool isVarArg,
1471 const SmallVectorImpl<ISD::OutputArg> &Outs,
1472 const SmallVectorImpl<SDValue> &OutVals,
1473 DebugLoc dl, SelectionDAG &DAG) const {
1474 MachineFunction &MF = DAG.getMachineFunction();
1475 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1477 SmallVector<CCValAssign, 16> RVLocs;
1478 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
1479 RVLocs, *DAG.getContext());
1480 CCInfo.AnalyzeReturn(Outs, RetCC_X86);
1482 // Add the regs to the liveout set for the function.
1483 MachineRegisterInfo &MRI = DAG.getMachineFunction().getRegInfo();
1484 for (unsigned i = 0; i != RVLocs.size(); ++i)
1485 if (RVLocs[i].isRegLoc() && !MRI.isLiveOut(RVLocs[i].getLocReg()))
1486 MRI.addLiveOut(RVLocs[i].getLocReg());
1490 SmallVector<SDValue, 6> RetOps;
1491 RetOps.push_back(Chain); // Operand #0 = Chain (updated below)
1492 // Operand #1 = Bytes To Pop
1493 RetOps.push_back(DAG.getTargetConstant(FuncInfo->getBytesToPopOnReturn(),
1496 // Copy the result values into the output registers.
1497 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1498 CCValAssign &VA = RVLocs[i];
1499 assert(VA.isRegLoc() && "Can only return in registers!");
1500 SDValue ValToCopy = OutVals[i];
1501 EVT ValVT = ValToCopy.getValueType();
1503 // If this is x86-64, and we disabled SSE, we can't return FP values,
1504 // or SSE or MMX vectors.
1505 if ((ValVT == MVT::f32 || ValVT == MVT::f64 ||
1506 VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) &&
1507 (Subtarget->is64Bit() && !Subtarget->hasSSE1())) {
1508 report_fatal_error("SSE register return with SSE disabled");
1510 // Likewise we can't return F64 values with SSE1 only. gcc does so, but
1511 // llvm-gcc has never done it right and no one has noticed, so this
1512 // should be OK for now.
1513 if (ValVT == MVT::f64 &&
1514 (Subtarget->is64Bit() && !Subtarget->hasSSE2()))
1515 report_fatal_error("SSE2 register return with SSE2 disabled");
1517 // Returns in ST0/ST1 are handled specially: these are pushed as operands to
1518 // the RET instruction and handled by the FP Stackifier.
1519 if (VA.getLocReg() == X86::ST0 ||
1520 VA.getLocReg() == X86::ST1) {
1521 // If this is a copy from an xmm register to ST(0), use an FPExtend to
1522 // change the value to the FP stack register class.
1523 if (isScalarFPTypeInSSEReg(VA.getValVT()))
1524 ValToCopy = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f80, ValToCopy);
1525 RetOps.push_back(ValToCopy);
1526 // Don't emit a copytoreg.
1530 // 64-bit vector (MMX) values are returned in XMM0 / XMM1 except for v1i64
1531 // which is returned in RAX / RDX.
1532 if (Subtarget->is64Bit()) {
1533 if (ValVT == MVT::x86mmx) {
1534 if (VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) {
1535 ValToCopy = DAG.getNode(ISD::BITCAST, dl, MVT::i64, ValToCopy);
1536 ValToCopy = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64,
1538 // If we don't have SSE2 available, convert to v4f32 so the generated
1539 // register is legal.
1540 if (!Subtarget->hasSSE2())
1541 ValToCopy = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32,ValToCopy);
1546 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), ValToCopy, Flag);
1547 Flag = Chain.getValue(1);
1550 // The x86-64 ABI for returning structs by value requires that we copy
1551 // the sret argument into %rax for the return. We saved the argument into
1552 // a virtual register in the entry block, so now we copy the value out
1554 if (Subtarget->is64Bit() &&
1555 DAG.getMachineFunction().getFunction()->hasStructRetAttr()) {
1556 MachineFunction &MF = DAG.getMachineFunction();
1557 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1558 unsigned Reg = FuncInfo->getSRetReturnReg();
1560 "SRetReturnReg should have been set in LowerFormalArguments().");
1561 SDValue Val = DAG.getCopyFromReg(Chain, dl, Reg, getPointerTy());
1563 Chain = DAG.getCopyToReg(Chain, dl, X86::RAX, Val, Flag);
1564 Flag = Chain.getValue(1);
1566 // RAX now acts like a return value.
1567 MRI.addLiveOut(X86::RAX);
1570 RetOps[0] = Chain; // Update chain.
1572 // Add the flag if we have it.
1574 RetOps.push_back(Flag);
1576 return DAG.getNode(X86ISD::RET_FLAG, dl,
1577 MVT::Other, &RetOps[0], RetOps.size());
1580 bool X86TargetLowering::isUsedByReturnOnly(SDNode *N) const {
1581 if (N->getNumValues() != 1)
1583 if (!N->hasNUsesOfValue(1, 0))
1586 SDNode *Copy = *N->use_begin();
1587 if (Copy->getOpcode() != ISD::CopyToReg &&
1588 Copy->getOpcode() != ISD::FP_EXTEND)
1591 bool HasRet = false;
1592 for (SDNode::use_iterator UI = Copy->use_begin(), UE = Copy->use_end();
1594 if (UI->getOpcode() != X86ISD::RET_FLAG)
1603 X86TargetLowering::getTypeForExtArgOrReturn(LLVMContext &Context, EVT VT,
1604 ISD::NodeType ExtendKind) const {
1606 // TODO: Is this also valid on 32-bit?
1607 if (Subtarget->is64Bit() && VT == MVT::i1 && ExtendKind == ISD::ZERO_EXTEND)
1608 ReturnMVT = MVT::i8;
1610 ReturnMVT = MVT::i32;
1612 EVT MinVT = getRegisterType(Context, ReturnMVT);
1613 return VT.bitsLT(MinVT) ? MinVT : VT;
1616 /// LowerCallResult - Lower the result values of a call into the
1617 /// appropriate copies out of appropriate physical registers.
1620 X86TargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
1621 CallingConv::ID CallConv, bool isVarArg,
1622 const SmallVectorImpl<ISD::InputArg> &Ins,
1623 DebugLoc dl, SelectionDAG &DAG,
1624 SmallVectorImpl<SDValue> &InVals) const {
1626 // Assign locations to each value returned by this call.
1627 SmallVector<CCValAssign, 16> RVLocs;
1628 bool Is64Bit = Subtarget->is64Bit();
1629 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1630 getTargetMachine(), RVLocs, *DAG.getContext());
1631 CCInfo.AnalyzeCallResult(Ins, RetCC_X86);
1633 // Copy all of the result registers out of their specified physreg.
1634 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1635 CCValAssign &VA = RVLocs[i];
1636 EVT CopyVT = VA.getValVT();
1638 // If this is x86-64, and we disabled SSE, we can't return FP values
1639 if ((CopyVT == MVT::f32 || CopyVT == MVT::f64) &&
1640 ((Is64Bit || Ins[i].Flags.isInReg()) && !Subtarget->hasSSE1())) {
1641 report_fatal_error("SSE register return with SSE disabled");
1646 // If this is a call to a function that returns an fp value on the floating
1647 // point stack, we must guarantee the the value is popped from the stack, so
1648 // a CopyFromReg is not good enough - the copy instruction may be eliminated
1649 // if the return value is not used. We use the FpPOP_RETVAL instruction
1651 if (VA.getLocReg() == X86::ST0 || VA.getLocReg() == X86::ST1) {
1652 // If we prefer to use the value in xmm registers, copy it out as f80 and
1653 // use a truncate to move it from fp stack reg to xmm reg.
1654 if (isScalarFPTypeInSSEReg(VA.getValVT())) CopyVT = MVT::f80;
1655 SDValue Ops[] = { Chain, InFlag };
1656 Chain = SDValue(DAG.getMachineNode(X86::FpPOP_RETVAL, dl, CopyVT,
1657 MVT::Other, MVT::Glue, Ops, 2), 1);
1658 Val = Chain.getValue(0);
1660 // Round the f80 to the right size, which also moves it to the appropriate
1662 if (CopyVT != VA.getValVT())
1663 Val = DAG.getNode(ISD::FP_ROUND, dl, VA.getValVT(), Val,
1664 // This truncation won't change the value.
1665 DAG.getIntPtrConstant(1));
1667 Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
1668 CopyVT, InFlag).getValue(1);
1669 Val = Chain.getValue(0);
1671 InFlag = Chain.getValue(2);
1672 InVals.push_back(Val);
1679 //===----------------------------------------------------------------------===//
1680 // C & StdCall & Fast Calling Convention implementation
1681 //===----------------------------------------------------------------------===//
1682 // StdCall calling convention seems to be standard for many Windows' API
1683 // routines and around. It differs from C calling convention just a little:
1684 // callee should clean up the stack, not caller. Symbols should be also
1685 // decorated in some fancy way :) It doesn't support any vector arguments.
1686 // For info on fast calling convention see Fast Calling Convention (tail call)
1687 // implementation LowerX86_32FastCCCallTo.
1689 /// CallIsStructReturn - Determines whether a call uses struct return
1691 static bool CallIsStructReturn(const SmallVectorImpl<ISD::OutputArg> &Outs) {
1695 return Outs[0].Flags.isSRet();
1698 /// ArgsAreStructReturn - Determines whether a function uses struct
1699 /// return semantics.
1701 ArgsAreStructReturn(const SmallVectorImpl<ISD::InputArg> &Ins) {
1705 return Ins[0].Flags.isSRet();
1708 /// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
1709 /// by "Src" to address "Dst" with size and alignment information specified by
1710 /// the specific parameter attribute. The copy will be passed as a byval
1711 /// function parameter.
1713 CreateCopyOfByValArgument(SDValue Src, SDValue Dst, SDValue Chain,
1714 ISD::ArgFlagsTy Flags, SelectionDAG &DAG,
1716 SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), MVT::i32);
1718 return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
1719 /*isVolatile*/false, /*AlwaysInline=*/true,
1720 MachinePointerInfo(), MachinePointerInfo());
1723 /// IsTailCallConvention - Return true if the calling convention is one that
1724 /// supports tail call optimization.
1725 static bool IsTailCallConvention(CallingConv::ID CC) {
1726 return (CC == CallingConv::Fast || CC == CallingConv::GHC);
1729 bool X86TargetLowering::mayBeEmittedAsTailCall(CallInst *CI) const {
1730 if (!CI->isTailCall() || getTargetMachine().Options.DisableTailCalls)
1734 CallingConv::ID CalleeCC = CS.getCallingConv();
1735 if (!IsTailCallConvention(CalleeCC) && CalleeCC != CallingConv::C)
1741 /// FuncIsMadeTailCallSafe - Return true if the function is being made into
1742 /// a tailcall target by changing its ABI.
1743 static bool FuncIsMadeTailCallSafe(CallingConv::ID CC,
1744 bool GuaranteedTailCallOpt) {
1745 return GuaranteedTailCallOpt && IsTailCallConvention(CC);
1749 X86TargetLowering::LowerMemArgument(SDValue Chain,
1750 CallingConv::ID CallConv,
1751 const SmallVectorImpl<ISD::InputArg> &Ins,
1752 DebugLoc dl, SelectionDAG &DAG,
1753 const CCValAssign &VA,
1754 MachineFrameInfo *MFI,
1756 // Create the nodes corresponding to a load from this parameter slot.
1757 ISD::ArgFlagsTy Flags = Ins[i].Flags;
1758 bool AlwaysUseMutable = FuncIsMadeTailCallSafe(CallConv,
1759 getTargetMachine().Options.GuaranteedTailCallOpt);
1760 bool isImmutable = !AlwaysUseMutable && !Flags.isByVal();
1763 // If value is passed by pointer we have address passed instead of the value
1765 if (VA.getLocInfo() == CCValAssign::Indirect)
1766 ValVT = VA.getLocVT();
1768 ValVT = VA.getValVT();
1770 // FIXME: For now, all byval parameter objects are marked mutable. This can be
1771 // changed with more analysis.
1772 // In case of tail call optimization mark all arguments mutable. Since they
1773 // could be overwritten by lowering of arguments in case of a tail call.
1774 if (Flags.isByVal()) {
1775 unsigned Bytes = Flags.getByValSize();
1776 if (Bytes == 0) Bytes = 1; // Don't create zero-sized stack objects.
1777 int FI = MFI->CreateFixedObject(Bytes, VA.getLocMemOffset(), isImmutable);
1778 return DAG.getFrameIndex(FI, getPointerTy());
1780 int FI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
1781 VA.getLocMemOffset(), isImmutable);
1782 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
1783 return DAG.getLoad(ValVT, dl, Chain, FIN,
1784 MachinePointerInfo::getFixedStack(FI),
1785 false, false, false, 0);
1790 X86TargetLowering::LowerFormalArguments(SDValue Chain,
1791 CallingConv::ID CallConv,
1793 const SmallVectorImpl<ISD::InputArg> &Ins,
1796 SmallVectorImpl<SDValue> &InVals)
1798 MachineFunction &MF = DAG.getMachineFunction();
1799 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1801 const Function* Fn = MF.getFunction();
1802 if (Fn->hasExternalLinkage() &&
1803 Subtarget->isTargetCygMing() &&
1804 Fn->getName() == "main")
1805 FuncInfo->setForceFramePointer(true);
1807 MachineFrameInfo *MFI = MF.getFrameInfo();
1808 bool Is64Bit = Subtarget->is64Bit();
1809 bool IsWindows = Subtarget->isTargetWindows();
1810 bool IsWin64 = Subtarget->isTargetWin64();
1812 assert(!(isVarArg && IsTailCallConvention(CallConv)) &&
1813 "Var args not supported with calling convention fastcc or ghc");
1815 // Assign locations to all of the incoming arguments.
1816 SmallVector<CCValAssign, 16> ArgLocs;
1817 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
1818 ArgLocs, *DAG.getContext());
1820 // Allocate shadow area for Win64
1822 CCInfo.AllocateStack(32, 8);
1825 CCInfo.AnalyzeFormalArguments(Ins, CC_X86);
1827 unsigned LastVal = ~0U;
1829 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
1830 CCValAssign &VA = ArgLocs[i];
1831 // TODO: If an arg is passed in two places (e.g. reg and stack), skip later
1833 assert(VA.getValNo() != LastVal &&
1834 "Don't support value assigned to multiple locs yet");
1836 LastVal = VA.getValNo();
1838 if (VA.isRegLoc()) {
1839 EVT RegVT = VA.getLocVT();
1840 TargetRegisterClass *RC = NULL;
1841 if (RegVT == MVT::i32)
1842 RC = X86::GR32RegisterClass;
1843 else if (Is64Bit && RegVT == MVT::i64)
1844 RC = X86::GR64RegisterClass;
1845 else if (RegVT == MVT::f32)
1846 RC = X86::FR32RegisterClass;
1847 else if (RegVT == MVT::f64)
1848 RC = X86::FR64RegisterClass;
1849 else if (RegVT.isVector() && RegVT.getSizeInBits() == 256)
1850 RC = X86::VR256RegisterClass;
1851 else if (RegVT.isVector() && RegVT.getSizeInBits() == 128)
1852 RC = X86::VR128RegisterClass;
1853 else if (RegVT == MVT::x86mmx)
1854 RC = X86::VR64RegisterClass;
1856 llvm_unreachable("Unknown argument type!");
1858 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
1859 ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
1861 // If this is an 8 or 16-bit value, it is really passed promoted to 32
1862 // bits. Insert an assert[sz]ext to capture this, then truncate to the
1864 if (VA.getLocInfo() == CCValAssign::SExt)
1865 ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue,
1866 DAG.getValueType(VA.getValVT()));
1867 else if (VA.getLocInfo() == CCValAssign::ZExt)
1868 ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue,
1869 DAG.getValueType(VA.getValVT()));
1870 else if (VA.getLocInfo() == CCValAssign::BCvt)
1871 ArgValue = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), ArgValue);
1873 if (VA.isExtInLoc()) {
1874 // Handle MMX values passed in XMM regs.
1875 if (RegVT.isVector()) {
1876 ArgValue = DAG.getNode(X86ISD::MOVDQ2Q, dl, VA.getValVT(),
1879 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
1882 assert(VA.isMemLoc());
1883 ArgValue = LowerMemArgument(Chain, CallConv, Ins, dl, DAG, VA, MFI, i);
1886 // If value is passed via pointer - do a load.
1887 if (VA.getLocInfo() == CCValAssign::Indirect)
1888 ArgValue = DAG.getLoad(VA.getValVT(), dl, Chain, ArgValue,
1889 MachinePointerInfo(), false, false, false, 0);
1891 InVals.push_back(ArgValue);
1894 // The x86-64 ABI for returning structs by value requires that we copy
1895 // the sret argument into %rax for the return. Save the argument into
1896 // a virtual register so that we can access it from the return points.
1897 if (Is64Bit && MF.getFunction()->hasStructRetAttr()) {
1898 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1899 unsigned Reg = FuncInfo->getSRetReturnReg();
1901 Reg = MF.getRegInfo().createVirtualRegister(getRegClassFor(MVT::i64));
1902 FuncInfo->setSRetReturnReg(Reg);
1904 SDValue Copy = DAG.getCopyToReg(DAG.getEntryNode(), dl, Reg, InVals[0]);
1905 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Copy, Chain);
1908 unsigned StackSize = CCInfo.getNextStackOffset();
1909 // Align stack specially for tail calls.
1910 if (FuncIsMadeTailCallSafe(CallConv,
1911 MF.getTarget().Options.GuaranteedTailCallOpt))
1912 StackSize = GetAlignedArgumentStackSize(StackSize, DAG);
1914 // If the function takes variable number of arguments, make a frame index for
1915 // the start of the first vararg value... for expansion of llvm.va_start.
1917 if (Is64Bit || (CallConv != CallingConv::X86_FastCall &&
1918 CallConv != CallingConv::X86_ThisCall)) {
1919 FuncInfo->setVarArgsFrameIndex(MFI->CreateFixedObject(1, StackSize,true));
1922 unsigned TotalNumIntRegs = 0, TotalNumXMMRegs = 0;
1924 // FIXME: We should really autogenerate these arrays
1925 static const unsigned GPR64ArgRegsWin64[] = {
1926 X86::RCX, X86::RDX, X86::R8, X86::R9
1928 static const unsigned GPR64ArgRegs64Bit[] = {
1929 X86::RDI, X86::RSI, X86::RDX, X86::RCX, X86::R8, X86::R9
1931 static const unsigned XMMArgRegs64Bit[] = {
1932 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
1933 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
1935 const unsigned *GPR64ArgRegs;
1936 unsigned NumXMMRegs = 0;
1939 // The XMM registers which might contain var arg parameters are shadowed
1940 // in their paired GPR. So we only need to save the GPR to their home
1942 TotalNumIntRegs = 4;
1943 GPR64ArgRegs = GPR64ArgRegsWin64;
1945 TotalNumIntRegs = 6; TotalNumXMMRegs = 8;
1946 GPR64ArgRegs = GPR64ArgRegs64Bit;
1948 NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs64Bit,
1951 unsigned NumIntRegs = CCInfo.getFirstUnallocated(GPR64ArgRegs,
1954 bool NoImplicitFloatOps = Fn->hasFnAttr(Attribute::NoImplicitFloat);
1955 assert(!(NumXMMRegs && !Subtarget->hasSSE1()) &&
1956 "SSE register cannot be used when SSE is disabled!");
1957 assert(!(NumXMMRegs && MF.getTarget().Options.UseSoftFloat &&
1958 NoImplicitFloatOps) &&
1959 "SSE register cannot be used when SSE is disabled!");
1960 if (MF.getTarget().Options.UseSoftFloat || NoImplicitFloatOps ||
1961 !Subtarget->hasSSE1())
1962 // Kernel mode asks for SSE to be disabled, so don't push them
1964 TotalNumXMMRegs = 0;
1967 const TargetFrameLowering &TFI = *getTargetMachine().getFrameLowering();
1968 // Get to the caller-allocated home save location. Add 8 to account
1969 // for the return address.
1970 int HomeOffset = TFI.getOffsetOfLocalArea() + 8;
1971 FuncInfo->setRegSaveFrameIndex(
1972 MFI->CreateFixedObject(1, NumIntRegs * 8 + HomeOffset, false));
1973 // Fixup to set vararg frame on shadow area (4 x i64).
1975 FuncInfo->setVarArgsFrameIndex(FuncInfo->getRegSaveFrameIndex());
1977 // For X86-64, if there are vararg parameters that are passed via
1978 // registers, then we must store them to their spots on the stack so
1979 // they may be loaded by deferencing the result of va_next.
1980 FuncInfo->setVarArgsGPOffset(NumIntRegs * 8);
1981 FuncInfo->setVarArgsFPOffset(TotalNumIntRegs * 8 + NumXMMRegs * 16);
1982 FuncInfo->setRegSaveFrameIndex(
1983 MFI->CreateStackObject(TotalNumIntRegs * 8 + TotalNumXMMRegs * 16, 16,
1987 // Store the integer parameter registers.
1988 SmallVector<SDValue, 8> MemOps;
1989 SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(),
1991 unsigned Offset = FuncInfo->getVarArgsGPOffset();
1992 for (; NumIntRegs != TotalNumIntRegs; ++NumIntRegs) {
1993 SDValue FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), RSFIN,
1994 DAG.getIntPtrConstant(Offset));
1995 unsigned VReg = MF.addLiveIn(GPR64ArgRegs[NumIntRegs],
1996 X86::GR64RegisterClass);
1997 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);
1999 DAG.getStore(Val.getValue(1), dl, Val, FIN,
2000 MachinePointerInfo::getFixedStack(
2001 FuncInfo->getRegSaveFrameIndex(), Offset),
2003 MemOps.push_back(Store);
2007 if (TotalNumXMMRegs != 0 && NumXMMRegs != TotalNumXMMRegs) {
2008 // Now store the XMM (fp + vector) parameter registers.
2009 SmallVector<SDValue, 11> SaveXMMOps;
2010 SaveXMMOps.push_back(Chain);
2012 unsigned AL = MF.addLiveIn(X86::AL, X86::GR8RegisterClass);
2013 SDValue ALVal = DAG.getCopyFromReg(DAG.getEntryNode(), dl, AL, MVT::i8);
2014 SaveXMMOps.push_back(ALVal);
2016 SaveXMMOps.push_back(DAG.getIntPtrConstant(
2017 FuncInfo->getRegSaveFrameIndex()));
2018 SaveXMMOps.push_back(DAG.getIntPtrConstant(
2019 FuncInfo->getVarArgsFPOffset()));
2021 for (; NumXMMRegs != TotalNumXMMRegs; ++NumXMMRegs) {
2022 unsigned VReg = MF.addLiveIn(XMMArgRegs64Bit[NumXMMRegs],
2023 X86::VR128RegisterClass);
2024 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::v4f32);
2025 SaveXMMOps.push_back(Val);
2027 MemOps.push_back(DAG.getNode(X86ISD::VASTART_SAVE_XMM_REGS, dl,
2029 &SaveXMMOps[0], SaveXMMOps.size()));
2032 if (!MemOps.empty())
2033 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2034 &MemOps[0], MemOps.size());
2038 // Some CCs need callee pop.
2039 if (X86::isCalleePop(CallConv, Is64Bit, isVarArg,
2040 MF.getTarget().Options.GuaranteedTailCallOpt)) {
2041 FuncInfo->setBytesToPopOnReturn(StackSize); // Callee pops everything.
2043 FuncInfo->setBytesToPopOnReturn(0); // Callee pops nothing.
2044 // If this is an sret function, the return should pop the hidden pointer.
2045 if (!Is64Bit && !IsTailCallConvention(CallConv) && !IsWindows &&
2046 ArgsAreStructReturn(Ins))
2047 FuncInfo->setBytesToPopOnReturn(4);
2051 // RegSaveFrameIndex is X86-64 only.
2052 FuncInfo->setRegSaveFrameIndex(0xAAAAAAA);
2053 if (CallConv == CallingConv::X86_FastCall ||
2054 CallConv == CallingConv::X86_ThisCall)
2055 // fastcc functions can't have varargs.
2056 FuncInfo->setVarArgsFrameIndex(0xAAAAAAA);
2059 FuncInfo->setArgumentStackSize(StackSize);
2065 X86TargetLowering::LowerMemOpCallTo(SDValue Chain,
2066 SDValue StackPtr, SDValue Arg,
2067 DebugLoc dl, SelectionDAG &DAG,
2068 const CCValAssign &VA,
2069 ISD::ArgFlagsTy Flags) const {
2070 unsigned LocMemOffset = VA.getLocMemOffset();
2071 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
2072 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
2073 if (Flags.isByVal())
2074 return CreateCopyOfByValArgument(Arg, PtrOff, Chain, Flags, DAG, dl);
2076 return DAG.getStore(Chain, dl, Arg, PtrOff,
2077 MachinePointerInfo::getStack(LocMemOffset),
2081 /// EmitTailCallLoadRetAddr - Emit a load of return address if tail call
2082 /// optimization is performed and it is required.
2084 X86TargetLowering::EmitTailCallLoadRetAddr(SelectionDAG &DAG,
2085 SDValue &OutRetAddr, SDValue Chain,
2086 bool IsTailCall, bool Is64Bit,
2087 int FPDiff, DebugLoc dl) const {
2088 // Adjust the Return address stack slot.
2089 EVT VT = getPointerTy();
2090 OutRetAddr = getReturnAddressFrameIndex(DAG);
2092 // Load the "old" Return address.
2093 OutRetAddr = DAG.getLoad(VT, dl, Chain, OutRetAddr, MachinePointerInfo(),
2094 false, false, false, 0);
2095 return SDValue(OutRetAddr.getNode(), 1);
2098 /// EmitTailCallStoreRetAddr - Emit a store of the return address if tail call
2099 /// optimization is performed and it is required (FPDiff!=0).
2101 EmitTailCallStoreRetAddr(SelectionDAG & DAG, MachineFunction &MF,
2102 SDValue Chain, SDValue RetAddrFrIdx,
2103 bool Is64Bit, int FPDiff, DebugLoc dl) {
2104 // Store the return address to the appropriate stack slot.
2105 if (!FPDiff) return Chain;
2106 // Calculate the new stack slot for the return address.
2107 int SlotSize = Is64Bit ? 8 : 4;
2108 int NewReturnAddrFI =
2109 MF.getFrameInfo()->CreateFixedObject(SlotSize, FPDiff-SlotSize, false);
2110 EVT VT = Is64Bit ? MVT::i64 : MVT::i32;
2111 SDValue NewRetAddrFrIdx = DAG.getFrameIndex(NewReturnAddrFI, VT);
2112 Chain = DAG.getStore(Chain, dl, RetAddrFrIdx, NewRetAddrFrIdx,
2113 MachinePointerInfo::getFixedStack(NewReturnAddrFI),
2119 X86TargetLowering::LowerCall(SDValue Chain, SDValue Callee,
2120 CallingConv::ID CallConv, bool isVarArg,
2122 const SmallVectorImpl<ISD::OutputArg> &Outs,
2123 const SmallVectorImpl<SDValue> &OutVals,
2124 const SmallVectorImpl<ISD::InputArg> &Ins,
2125 DebugLoc dl, SelectionDAG &DAG,
2126 SmallVectorImpl<SDValue> &InVals) const {
2127 MachineFunction &MF = DAG.getMachineFunction();
2128 bool Is64Bit = Subtarget->is64Bit();
2129 bool IsWin64 = Subtarget->isTargetWin64();
2130 bool IsWindows = Subtarget->isTargetWindows();
2131 bool IsStructRet = CallIsStructReturn(Outs);
2132 bool IsSibcall = false;
2134 if (MF.getTarget().Options.DisableTailCalls)
2138 // Check if it's really possible to do a tail call.
2139 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv,
2140 isVarArg, IsStructRet, MF.getFunction()->hasStructRetAttr(),
2141 Outs, OutVals, Ins, DAG);
2143 // Sibcalls are automatically detected tailcalls which do not require
2145 if (!MF.getTarget().Options.GuaranteedTailCallOpt && isTailCall)
2152 assert(!(isVarArg && IsTailCallConvention(CallConv)) &&
2153 "Var args not supported with calling convention fastcc or ghc");
2155 // Analyze operands of the call, assigning locations to each operand.
2156 SmallVector<CCValAssign, 16> ArgLocs;
2157 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
2158 ArgLocs, *DAG.getContext());
2160 // Allocate shadow area for Win64
2162 CCInfo.AllocateStack(32, 8);
2165 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2167 // Get a count of how many bytes are to be pushed on the stack.
2168 unsigned NumBytes = CCInfo.getNextStackOffset();
2170 // This is a sibcall. The memory operands are available in caller's
2171 // own caller's stack.
2173 else if (getTargetMachine().Options.GuaranteedTailCallOpt &&
2174 IsTailCallConvention(CallConv))
2175 NumBytes = GetAlignedArgumentStackSize(NumBytes, DAG);
2178 if (isTailCall && !IsSibcall) {
2179 // Lower arguments at fp - stackoffset + fpdiff.
2180 unsigned NumBytesCallerPushed =
2181 MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn();
2182 FPDiff = NumBytesCallerPushed - NumBytes;
2184 // Set the delta of movement of the returnaddr stackslot.
2185 // But only set if delta is greater than previous delta.
2186 if (FPDiff < (MF.getInfo<X86MachineFunctionInfo>()->getTCReturnAddrDelta()))
2187 MF.getInfo<X86MachineFunctionInfo>()->setTCReturnAddrDelta(FPDiff);
2191 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
2193 SDValue RetAddrFrIdx;
2194 // Load return address for tail calls.
2195 if (isTailCall && FPDiff)
2196 Chain = EmitTailCallLoadRetAddr(DAG, RetAddrFrIdx, Chain, isTailCall,
2197 Is64Bit, FPDiff, dl);
2199 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
2200 SmallVector<SDValue, 8> MemOpChains;
2203 // Walk the register/memloc assignments, inserting copies/loads. In the case
2204 // of tail call optimization arguments are handle later.
2205 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2206 CCValAssign &VA = ArgLocs[i];
2207 EVT RegVT = VA.getLocVT();
2208 SDValue Arg = OutVals[i];
2209 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2210 bool isByVal = Flags.isByVal();
2212 // Promote the value if needed.
2213 switch (VA.getLocInfo()) {
2214 default: llvm_unreachable("Unknown loc info!");
2215 case CCValAssign::Full: break;
2216 case CCValAssign::SExt:
2217 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, RegVT, Arg);
2219 case CCValAssign::ZExt:
2220 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, RegVT, Arg);
2222 case CCValAssign::AExt:
2223 if (RegVT.isVector() && RegVT.getSizeInBits() == 128) {
2224 // Special case: passing MMX values in XMM registers.
2225 Arg = DAG.getNode(ISD::BITCAST, dl, MVT::i64, Arg);
2226 Arg = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, Arg);
2227 Arg = getMOVL(DAG, dl, MVT::v2i64, DAG.getUNDEF(MVT::v2i64), Arg);
2229 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, RegVT, Arg);
2231 case CCValAssign::BCvt:
2232 Arg = DAG.getNode(ISD::BITCAST, dl, RegVT, Arg);
2234 case CCValAssign::Indirect: {
2235 // Store the argument.
2236 SDValue SpillSlot = DAG.CreateStackTemporary(VA.getValVT());
2237 int FI = cast<FrameIndexSDNode>(SpillSlot)->getIndex();
2238 Chain = DAG.getStore(Chain, dl, Arg, SpillSlot,
2239 MachinePointerInfo::getFixedStack(FI),
2246 if (VA.isRegLoc()) {
2247 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
2248 if (isVarArg && IsWin64) {
2249 // Win64 ABI requires argument XMM reg to be copied to the corresponding
2250 // shadow reg if callee is a varargs function.
2251 unsigned ShadowReg = 0;
2252 switch (VA.getLocReg()) {
2253 case X86::XMM0: ShadowReg = X86::RCX; break;
2254 case X86::XMM1: ShadowReg = X86::RDX; break;
2255 case X86::XMM2: ShadowReg = X86::R8; break;
2256 case X86::XMM3: ShadowReg = X86::R9; break;
2259 RegsToPass.push_back(std::make_pair(ShadowReg, Arg));
2261 } else if (!IsSibcall && (!isTailCall || isByVal)) {
2262 assert(VA.isMemLoc());
2263 if (StackPtr.getNode() == 0)
2264 StackPtr = DAG.getCopyFromReg(Chain, dl, X86StackPtr, getPointerTy());
2265 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg,
2266 dl, DAG, VA, Flags));
2270 if (!MemOpChains.empty())
2271 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2272 &MemOpChains[0], MemOpChains.size());
2274 // Build a sequence of copy-to-reg nodes chained together with token chain
2275 // and flag operands which copy the outgoing args into registers.
2277 // Tail call byval lowering might overwrite argument registers so in case of
2278 // tail call optimization the copies to registers are lowered later.
2280 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2281 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
2282 RegsToPass[i].second, InFlag);
2283 InFlag = Chain.getValue(1);
2286 if (Subtarget->isPICStyleGOT()) {
2287 // ELF / PIC requires GOT in the EBX register before function calls via PLT
2290 Chain = DAG.getCopyToReg(Chain, dl, X86::EBX,
2291 DAG.getNode(X86ISD::GlobalBaseReg,
2292 DebugLoc(), getPointerTy()),
2294 InFlag = Chain.getValue(1);
2296 // If we are tail calling and generating PIC/GOT style code load the
2297 // address of the callee into ECX. The value in ecx is used as target of
2298 // the tail jump. This is done to circumvent the ebx/callee-saved problem
2299 // for tail calls on PIC/GOT architectures. Normally we would just put the
2300 // address of GOT into ebx and then call target@PLT. But for tail calls
2301 // ebx would be restored (since ebx is callee saved) before jumping to the
2304 // Note: The actual moving to ECX is done further down.
2305 GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee);
2306 if (G && !G->getGlobal()->hasHiddenVisibility() &&
2307 !G->getGlobal()->hasProtectedVisibility())
2308 Callee = LowerGlobalAddress(Callee, DAG);
2309 else if (isa<ExternalSymbolSDNode>(Callee))
2310 Callee = LowerExternalSymbol(Callee, DAG);
2314 if (Is64Bit && isVarArg && !IsWin64) {
2315 // From AMD64 ABI document:
2316 // For calls that may call functions that use varargs or stdargs
2317 // (prototype-less calls or calls to functions containing ellipsis (...) in
2318 // the declaration) %al is used as hidden argument to specify the number
2319 // of SSE registers used. The contents of %al do not need to match exactly
2320 // the number of registers, but must be an ubound on the number of SSE
2321 // registers used and is in the range 0 - 8 inclusive.
2323 // Count the number of XMM registers allocated.
2324 static const unsigned XMMArgRegs[] = {
2325 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
2326 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
2328 unsigned NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs, 8);
2329 assert((Subtarget->hasSSE1() || !NumXMMRegs)
2330 && "SSE registers cannot be used when SSE is disabled");
2332 Chain = DAG.getCopyToReg(Chain, dl, X86::AL,
2333 DAG.getConstant(NumXMMRegs, MVT::i8), InFlag);
2334 InFlag = Chain.getValue(1);
2338 // For tail calls lower the arguments to the 'real' stack slot.
2340 // Force all the incoming stack arguments to be loaded from the stack
2341 // before any new outgoing arguments are stored to the stack, because the
2342 // outgoing stack slots may alias the incoming argument stack slots, and
2343 // the alias isn't otherwise explicit. This is slightly more conservative
2344 // than necessary, because it means that each store effectively depends
2345 // on every argument instead of just those arguments it would clobber.
2346 SDValue ArgChain = DAG.getStackArgumentTokenFactor(Chain);
2348 SmallVector<SDValue, 8> MemOpChains2;
2351 // Do not flag preceding copytoreg stuff together with the following stuff.
2353 if (getTargetMachine().Options.GuaranteedTailCallOpt) {
2354 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2355 CCValAssign &VA = ArgLocs[i];
2358 assert(VA.isMemLoc());
2359 SDValue Arg = OutVals[i];
2360 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2361 // Create frame index.
2362 int32_t Offset = VA.getLocMemOffset()+FPDiff;
2363 uint32_t OpSize = (VA.getLocVT().getSizeInBits()+7)/8;
2364 FI = MF.getFrameInfo()->CreateFixedObject(OpSize, Offset, true);
2365 FIN = DAG.getFrameIndex(FI, getPointerTy());
2367 if (Flags.isByVal()) {
2368 // Copy relative to framepointer.
2369 SDValue Source = DAG.getIntPtrConstant(VA.getLocMemOffset());
2370 if (StackPtr.getNode() == 0)
2371 StackPtr = DAG.getCopyFromReg(Chain, dl, X86StackPtr,
2373 Source = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, Source);
2375 MemOpChains2.push_back(CreateCopyOfByValArgument(Source, FIN,
2379 // Store relative to framepointer.
2380 MemOpChains2.push_back(
2381 DAG.getStore(ArgChain, dl, Arg, FIN,
2382 MachinePointerInfo::getFixedStack(FI),
2388 if (!MemOpChains2.empty())
2389 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2390 &MemOpChains2[0], MemOpChains2.size());
2392 // Copy arguments to their registers.
2393 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2394 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
2395 RegsToPass[i].second, InFlag);
2396 InFlag = Chain.getValue(1);
2400 // Store the return address to the appropriate stack slot.
2401 Chain = EmitTailCallStoreRetAddr(DAG, MF, Chain, RetAddrFrIdx, Is64Bit,
2405 if (getTargetMachine().getCodeModel() == CodeModel::Large) {
2406 assert(Is64Bit && "Large code model is only legal in 64-bit mode.");
2407 // In the 64-bit large code model, we have to make all calls
2408 // through a register, since the call instruction's 32-bit
2409 // pc-relative offset may not be large enough to hold the whole
2411 } else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2412 // If the callee is a GlobalAddress node (quite common, every direct call
2413 // is) turn it into a TargetGlobalAddress node so that legalize doesn't hack
2416 // We should use extra load for direct calls to dllimported functions in
2418 const GlobalValue *GV = G->getGlobal();
2419 if (!GV->hasDLLImportLinkage()) {
2420 unsigned char OpFlags = 0;
2421 bool ExtraLoad = false;
2422 unsigned WrapperKind = ISD::DELETED_NODE;
2424 // On ELF targets, in both X86-64 and X86-32 mode, direct calls to
2425 // external symbols most go through the PLT in PIC mode. If the symbol
2426 // has hidden or protected visibility, or if it is static or local, then
2427 // we don't need to use the PLT - we can directly call it.
2428 if (Subtarget->isTargetELF() &&
2429 getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
2430 GV->hasDefaultVisibility() && !GV->hasLocalLinkage()) {
2431 OpFlags = X86II::MO_PLT;
2432 } else if (Subtarget->isPICStyleStubAny() &&
2433 (GV->isDeclaration() || GV->isWeakForLinker()) &&
2434 (!Subtarget->getTargetTriple().isMacOSX() ||
2435 Subtarget->getTargetTriple().isMacOSXVersionLT(10, 5))) {
2436 // PC-relative references to external symbols should go through $stub,
2437 // unless we're building with the leopard linker or later, which
2438 // automatically synthesizes these stubs.
2439 OpFlags = X86II::MO_DARWIN_STUB;
2440 } else if (Subtarget->isPICStyleRIPRel() &&
2441 isa<Function>(GV) &&
2442 cast<Function>(GV)->hasFnAttr(Attribute::NonLazyBind)) {
2443 // If the function is marked as non-lazy, generate an indirect call
2444 // which loads from the GOT directly. This avoids runtime overhead
2445 // at the cost of eager binding (and one extra byte of encoding).
2446 OpFlags = X86II::MO_GOTPCREL;
2447 WrapperKind = X86ISD::WrapperRIP;
2451 Callee = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(),
2452 G->getOffset(), OpFlags);
2454 // Add a wrapper if needed.
2455 if (WrapperKind != ISD::DELETED_NODE)
2456 Callee = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Callee);
2457 // Add extra indirection if needed.
2459 Callee = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(), Callee,
2460 MachinePointerInfo::getGOT(),
2461 false, false, false, 0);
2463 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
2464 unsigned char OpFlags = 0;
2466 // On ELF targets, in either X86-64 or X86-32 mode, direct calls to
2467 // external symbols should go through the PLT.
2468 if (Subtarget->isTargetELF() &&
2469 getTargetMachine().getRelocationModel() == Reloc::PIC_) {
2470 OpFlags = X86II::MO_PLT;
2471 } else if (Subtarget->isPICStyleStubAny() &&
2472 (!Subtarget->getTargetTriple().isMacOSX() ||
2473 Subtarget->getTargetTriple().isMacOSXVersionLT(10, 5))) {
2474 // PC-relative references to external symbols should go through $stub,
2475 // unless we're building with the leopard linker or later, which
2476 // automatically synthesizes these stubs.
2477 OpFlags = X86II::MO_DARWIN_STUB;
2480 Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy(),
2484 // Returns a chain & a flag for retval copy to use.
2485 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
2486 SmallVector<SDValue, 8> Ops;
2488 if (!IsSibcall && isTailCall) {
2489 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
2490 DAG.getIntPtrConstant(0, true), InFlag);
2491 InFlag = Chain.getValue(1);
2494 Ops.push_back(Chain);
2495 Ops.push_back(Callee);
2498 Ops.push_back(DAG.getConstant(FPDiff, MVT::i32));
2500 // Add argument registers to the end of the list so that they are known live
2502 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
2503 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
2504 RegsToPass[i].second.getValueType()));
2506 // Add an implicit use GOT pointer in EBX.
2507 if (!isTailCall && Subtarget->isPICStyleGOT())
2508 Ops.push_back(DAG.getRegister(X86::EBX, getPointerTy()));
2510 // Add an implicit use of AL for non-Windows x86 64-bit vararg functions.
2511 if (Is64Bit && isVarArg && !IsWin64)
2512 Ops.push_back(DAG.getRegister(X86::AL, MVT::i8));
2514 // Experimental: Add a register mask operand representing the call-preserved
2517 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
2518 if (const uint32_t *Mask = TRI->getCallPreservedMask(CallConv))
2519 Ops.push_back(DAG.getRegisterMask(Mask));
2522 if (InFlag.getNode())
2523 Ops.push_back(InFlag);
2527 //// If this is the first return lowered for this function, add the regs
2528 //// to the liveout set for the function.
2529 // This isn't right, although it's probably harmless on x86; liveouts
2530 // should be computed from returns not tail calls. Consider a void
2531 // function making a tail call to a function returning int.
2532 return DAG.getNode(X86ISD::TC_RETURN, dl,
2533 NodeTys, &Ops[0], Ops.size());
2536 Chain = DAG.getNode(X86ISD::CALL, dl, NodeTys, &Ops[0], Ops.size());
2537 InFlag = Chain.getValue(1);
2539 // Create the CALLSEQ_END node.
2540 unsigned NumBytesForCalleeToPush;
2541 if (X86::isCalleePop(CallConv, Is64Bit, isVarArg,
2542 getTargetMachine().Options.GuaranteedTailCallOpt))
2543 NumBytesForCalleeToPush = NumBytes; // Callee pops everything
2544 else if (!Is64Bit && !IsTailCallConvention(CallConv) && !IsWindows &&
2546 // If this is a call to a struct-return function, the callee
2547 // pops the hidden struct pointer, so we have to push it back.
2548 // This is common for Darwin/X86, Linux & Mingw32 targets.
2549 // For MSVC Win32 targets, the caller pops the hidden struct pointer.
2550 NumBytesForCalleeToPush = 4;
2552 NumBytesForCalleeToPush = 0; // Callee pops nothing.
2554 // Returns a flag for retval copy to use.
2556 Chain = DAG.getCALLSEQ_END(Chain,
2557 DAG.getIntPtrConstant(NumBytes, true),
2558 DAG.getIntPtrConstant(NumBytesForCalleeToPush,
2561 InFlag = Chain.getValue(1);
2564 // Handle result values, copying them out of physregs into vregs that we
2566 return LowerCallResult(Chain, InFlag, CallConv, isVarArg,
2567 Ins, dl, DAG, InVals);
2571 //===----------------------------------------------------------------------===//
2572 // Fast Calling Convention (tail call) implementation
2573 //===----------------------------------------------------------------------===//
2575 // Like std call, callee cleans arguments, convention except that ECX is
2576 // reserved for storing the tail called function address. Only 2 registers are
2577 // free for argument passing (inreg). Tail call optimization is performed
2579 // * tailcallopt is enabled
2580 // * caller/callee are fastcc
2581 // On X86_64 architecture with GOT-style position independent code only local
2582 // (within module) calls are supported at the moment.
2583 // To keep the stack aligned according to platform abi the function
2584 // GetAlignedArgumentStackSize ensures that argument delta is always multiples
2585 // of stack alignment. (Dynamic linkers need this - darwin's dyld for example)
2586 // If a tail called function callee has more arguments than the caller the
2587 // caller needs to make sure that there is room to move the RETADDR to. This is
2588 // achieved by reserving an area the size of the argument delta right after the
2589 // original REtADDR, but before the saved framepointer or the spilled registers
2590 // e.g. caller(arg1, arg2) calls callee(arg1, arg2,arg3,arg4)
2602 /// GetAlignedArgumentStackSize - Make the stack size align e.g 16n + 12 aligned
2603 /// for a 16 byte align requirement.
2605 X86TargetLowering::GetAlignedArgumentStackSize(unsigned StackSize,
2606 SelectionDAG& DAG) const {
2607 MachineFunction &MF = DAG.getMachineFunction();
2608 const TargetMachine &TM = MF.getTarget();
2609 const TargetFrameLowering &TFI = *TM.getFrameLowering();
2610 unsigned StackAlignment = TFI.getStackAlignment();
2611 uint64_t AlignMask = StackAlignment - 1;
2612 int64_t Offset = StackSize;
2613 uint64_t SlotSize = TD->getPointerSize();
2614 if ( (Offset & AlignMask) <= (StackAlignment - SlotSize) ) {
2615 // Number smaller than 12 so just add the difference.
2616 Offset += ((StackAlignment - SlotSize) - (Offset & AlignMask));
2618 // Mask out lower bits, add stackalignment once plus the 12 bytes.
2619 Offset = ((~AlignMask) & Offset) + StackAlignment +
2620 (StackAlignment-SlotSize);
2625 /// MatchingStackOffset - Return true if the given stack call argument is
2626 /// already available in the same position (relatively) of the caller's
2627 /// incoming argument stack.
2629 bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags,
2630 MachineFrameInfo *MFI, const MachineRegisterInfo *MRI,
2631 const X86InstrInfo *TII) {
2632 unsigned Bytes = Arg.getValueType().getSizeInBits() / 8;
2634 if (Arg.getOpcode() == ISD::CopyFromReg) {
2635 unsigned VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg();
2636 if (!TargetRegisterInfo::isVirtualRegister(VR))
2638 MachineInstr *Def = MRI->getVRegDef(VR);
2641 if (!Flags.isByVal()) {
2642 if (!TII->isLoadFromStackSlot(Def, FI))
2645 unsigned Opcode = Def->getOpcode();
2646 if ((Opcode == X86::LEA32r || Opcode == X86::LEA64r) &&
2647 Def->getOperand(1).isFI()) {
2648 FI = Def->getOperand(1).getIndex();
2649 Bytes = Flags.getByValSize();
2653 } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) {
2654 if (Flags.isByVal())
2655 // ByVal argument is passed in as a pointer but it's now being
2656 // dereferenced. e.g.
2657 // define @foo(%struct.X* %A) {
2658 // tail call @bar(%struct.X* byval %A)
2661 SDValue Ptr = Ld->getBasePtr();
2662 FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr);
2665 FI = FINode->getIndex();
2666 } else if (Arg.getOpcode() == ISD::FrameIndex && Flags.isByVal()) {
2667 FrameIndexSDNode *FINode = cast<FrameIndexSDNode>(Arg);
2668 FI = FINode->getIndex();
2669 Bytes = Flags.getByValSize();
2673 assert(FI != INT_MAX);
2674 if (!MFI->isFixedObjectIndex(FI))
2676 return Offset == MFI->getObjectOffset(FI) && Bytes == MFI->getObjectSize(FI);
2679 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
2680 /// for tail call optimization. Targets which want to do tail call
2681 /// optimization should implement this function.
2683 X86TargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
2684 CallingConv::ID CalleeCC,
2686 bool isCalleeStructRet,
2687 bool isCallerStructRet,
2688 const SmallVectorImpl<ISD::OutputArg> &Outs,
2689 const SmallVectorImpl<SDValue> &OutVals,
2690 const SmallVectorImpl<ISD::InputArg> &Ins,
2691 SelectionDAG& DAG) const {
2692 if (!IsTailCallConvention(CalleeCC) &&
2693 CalleeCC != CallingConv::C)
2696 // If -tailcallopt is specified, make fastcc functions tail-callable.
2697 const MachineFunction &MF = DAG.getMachineFunction();
2698 const Function *CallerF = DAG.getMachineFunction().getFunction();
2699 CallingConv::ID CallerCC = CallerF->getCallingConv();
2700 bool CCMatch = CallerCC == CalleeCC;
2702 if (getTargetMachine().Options.GuaranteedTailCallOpt) {
2703 if (IsTailCallConvention(CalleeCC) && CCMatch)
2708 // Look for obvious safe cases to perform tail call optimization that do not
2709 // require ABI changes. This is what gcc calls sibcall.
2711 // Can't do sibcall if stack needs to be dynamically re-aligned. PEI needs to
2712 // emit a special epilogue.
2713 if (RegInfo->needsStackRealignment(MF))
2716 // Also avoid sibcall optimization if either caller or callee uses struct
2717 // return semantics.
2718 if (isCalleeStructRet || isCallerStructRet)
2721 // An stdcall caller is expected to clean up its arguments; the callee
2722 // isn't going to do that.
2723 if (!CCMatch && CallerCC==CallingConv::X86_StdCall)
2726 // Do not sibcall optimize vararg calls unless all arguments are passed via
2728 if (isVarArg && !Outs.empty()) {
2730 // Optimizing for varargs on Win64 is unlikely to be safe without
2731 // additional testing.
2732 if (Subtarget->isTargetWin64())
2735 SmallVector<CCValAssign, 16> ArgLocs;
2736 CCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
2737 getTargetMachine(), ArgLocs, *DAG.getContext());
2739 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2740 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i)
2741 if (!ArgLocs[i].isRegLoc())
2745 // If the call result is in ST0 / ST1, it needs to be popped off the x87
2746 // stack. Therefore, if it's not used by the call it is not safe to optimize
2747 // this into a sibcall.
2748 bool Unused = false;
2749 for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
2756 SmallVector<CCValAssign, 16> RVLocs;
2757 CCState CCInfo(CalleeCC, false, DAG.getMachineFunction(),
2758 getTargetMachine(), RVLocs, *DAG.getContext());
2759 CCInfo.AnalyzeCallResult(Ins, RetCC_X86);
2760 for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) {
2761 CCValAssign &VA = RVLocs[i];
2762 if (VA.getLocReg() == X86::ST0 || VA.getLocReg() == X86::ST1)
2767 // If the calling conventions do not match, then we'd better make sure the
2768 // results are returned in the same way as what the caller expects.
2770 SmallVector<CCValAssign, 16> RVLocs1;
2771 CCState CCInfo1(CalleeCC, false, DAG.getMachineFunction(),
2772 getTargetMachine(), RVLocs1, *DAG.getContext());
2773 CCInfo1.AnalyzeCallResult(Ins, RetCC_X86);
2775 SmallVector<CCValAssign, 16> RVLocs2;
2776 CCState CCInfo2(CallerCC, false, DAG.getMachineFunction(),
2777 getTargetMachine(), RVLocs2, *DAG.getContext());
2778 CCInfo2.AnalyzeCallResult(Ins, RetCC_X86);
2780 if (RVLocs1.size() != RVLocs2.size())
2782 for (unsigned i = 0, e = RVLocs1.size(); i != e; ++i) {
2783 if (RVLocs1[i].isRegLoc() != RVLocs2[i].isRegLoc())
2785 if (RVLocs1[i].getLocInfo() != RVLocs2[i].getLocInfo())
2787 if (RVLocs1[i].isRegLoc()) {
2788 if (RVLocs1[i].getLocReg() != RVLocs2[i].getLocReg())
2791 if (RVLocs1[i].getLocMemOffset() != RVLocs2[i].getLocMemOffset())
2797 // If the callee takes no arguments then go on to check the results of the
2799 if (!Outs.empty()) {
2800 // Check if stack adjustment is needed. For now, do not do this if any
2801 // argument is passed on the stack.
2802 SmallVector<CCValAssign, 16> ArgLocs;
2803 CCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
2804 getTargetMachine(), ArgLocs, *DAG.getContext());
2806 // Allocate shadow area for Win64
2807 if (Subtarget->isTargetWin64()) {
2808 CCInfo.AllocateStack(32, 8);
2811 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2812 if (CCInfo.getNextStackOffset()) {
2813 MachineFunction &MF = DAG.getMachineFunction();
2814 if (MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn())
2817 // Check if the arguments are already laid out in the right way as
2818 // the caller's fixed stack objects.
2819 MachineFrameInfo *MFI = MF.getFrameInfo();
2820 const MachineRegisterInfo *MRI = &MF.getRegInfo();
2821 const X86InstrInfo *TII =
2822 ((X86TargetMachine&)getTargetMachine()).getInstrInfo();
2823 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2824 CCValAssign &VA = ArgLocs[i];
2825 SDValue Arg = OutVals[i];
2826 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2827 if (VA.getLocInfo() == CCValAssign::Indirect)
2829 if (!VA.isRegLoc()) {
2830 if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags,
2837 // If the tailcall address may be in a register, then make sure it's
2838 // possible to register allocate for it. In 32-bit, the call address can
2839 // only target EAX, EDX, or ECX since the tail call must be scheduled after
2840 // callee-saved registers are restored. These happen to be the same
2841 // registers used to pass 'inreg' arguments so watch out for those.
2842 if (!Subtarget->is64Bit() &&
2843 !isa<GlobalAddressSDNode>(Callee) &&
2844 !isa<ExternalSymbolSDNode>(Callee)) {
2845 unsigned NumInRegs = 0;
2846 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2847 CCValAssign &VA = ArgLocs[i];
2850 unsigned Reg = VA.getLocReg();
2853 case X86::EAX: case X86::EDX: case X86::ECX:
2854 if (++NumInRegs == 3)
2866 X86TargetLowering::createFastISel(FunctionLoweringInfo &funcInfo) const {
2867 return X86::createFastISel(funcInfo);
2871 //===----------------------------------------------------------------------===//
2872 // Other Lowering Hooks
2873 //===----------------------------------------------------------------------===//
2875 static bool MayFoldLoad(SDValue Op) {
2876 return Op.hasOneUse() && ISD::isNormalLoad(Op.getNode());
2879 static bool MayFoldIntoStore(SDValue Op) {
2880 return Op.hasOneUse() && ISD::isNormalStore(*Op.getNode()->use_begin());
2883 static bool isTargetShuffle(unsigned Opcode) {
2885 default: return false;
2886 case X86ISD::PSHUFD:
2887 case X86ISD::PSHUFHW:
2888 case X86ISD::PSHUFLW:
2890 case X86ISD::PALIGN:
2891 case X86ISD::MOVLHPS:
2892 case X86ISD::MOVLHPD:
2893 case X86ISD::MOVHLPS:
2894 case X86ISD::MOVLPS:
2895 case X86ISD::MOVLPD:
2896 case X86ISD::MOVSHDUP:
2897 case X86ISD::MOVSLDUP:
2898 case X86ISD::MOVDDUP:
2901 case X86ISD::UNPCKL:
2902 case X86ISD::UNPCKH:
2903 case X86ISD::VPERMILP:
2904 case X86ISD::VPERM2X128:
2909 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2910 SDValue V1, SelectionDAG &DAG) {
2912 default: llvm_unreachable("Unknown x86 shuffle node");
2913 case X86ISD::MOVSHDUP:
2914 case X86ISD::MOVSLDUP:
2915 case X86ISD::MOVDDUP:
2916 return DAG.getNode(Opc, dl, VT, V1);
2920 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2921 SDValue V1, unsigned TargetMask, SelectionDAG &DAG) {
2923 default: llvm_unreachable("Unknown x86 shuffle node");
2924 case X86ISD::PSHUFD:
2925 case X86ISD::PSHUFHW:
2926 case X86ISD::PSHUFLW:
2927 case X86ISD::VPERMILP:
2928 return DAG.getNode(Opc, dl, VT, V1, DAG.getConstant(TargetMask, MVT::i8));
2932 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2933 SDValue V1, SDValue V2, unsigned TargetMask, SelectionDAG &DAG) {
2935 default: llvm_unreachable("Unknown x86 shuffle node");
2936 case X86ISD::PALIGN:
2938 case X86ISD::VPERM2X128:
2939 return DAG.getNode(Opc, dl, VT, V1, V2,
2940 DAG.getConstant(TargetMask, MVT::i8));
2944 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2945 SDValue V1, SDValue V2, SelectionDAG &DAG) {
2947 default: llvm_unreachable("Unknown x86 shuffle node");
2948 case X86ISD::MOVLHPS:
2949 case X86ISD::MOVLHPD:
2950 case X86ISD::MOVHLPS:
2951 case X86ISD::MOVLPS:
2952 case X86ISD::MOVLPD:
2955 case X86ISD::UNPCKL:
2956 case X86ISD::UNPCKH:
2957 return DAG.getNode(Opc, dl, VT, V1, V2);
2961 SDValue X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) const {
2962 MachineFunction &MF = DAG.getMachineFunction();
2963 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
2964 int ReturnAddrIndex = FuncInfo->getRAIndex();
2966 if (ReturnAddrIndex == 0) {
2967 // Set up a frame object for the return address.
2968 uint64_t SlotSize = TD->getPointerSize();
2969 ReturnAddrIndex = MF.getFrameInfo()->CreateFixedObject(SlotSize, -SlotSize,
2971 FuncInfo->setRAIndex(ReturnAddrIndex);
2974 return DAG.getFrameIndex(ReturnAddrIndex, getPointerTy());
2978 bool X86::isOffsetSuitableForCodeModel(int64_t Offset, CodeModel::Model M,
2979 bool hasSymbolicDisplacement) {
2980 // Offset should fit into 32 bit immediate field.
2981 if (!isInt<32>(Offset))
2984 // If we don't have a symbolic displacement - we don't have any extra
2986 if (!hasSymbolicDisplacement)
2989 // FIXME: Some tweaks might be needed for medium code model.
2990 if (M != CodeModel::Small && M != CodeModel::Kernel)
2993 // For small code model we assume that latest object is 16MB before end of 31
2994 // bits boundary. We may also accept pretty large negative constants knowing
2995 // that all objects are in the positive half of address space.
2996 if (M == CodeModel::Small && Offset < 16*1024*1024)
2999 // For kernel code model we know that all object resist in the negative half
3000 // of 32bits address space. We may not accept negative offsets, since they may
3001 // be just off and we may accept pretty large positive ones.
3002 if (M == CodeModel::Kernel && Offset > 0)
3008 /// isCalleePop - Determines whether the callee is required to pop its
3009 /// own arguments. Callee pop is necessary to support tail calls.
3010 bool X86::isCalleePop(CallingConv::ID CallingConv,
3011 bool is64Bit, bool IsVarArg, bool TailCallOpt) {
3015 switch (CallingConv) {
3018 case CallingConv::X86_StdCall:
3020 case CallingConv::X86_FastCall:
3022 case CallingConv::X86_ThisCall:
3024 case CallingConv::Fast:
3026 case CallingConv::GHC:
3031 /// TranslateX86CC - do a one to one translation of a ISD::CondCode to the X86
3032 /// specific condition code, returning the condition code and the LHS/RHS of the
3033 /// comparison to make.
3034 static unsigned TranslateX86CC(ISD::CondCode SetCCOpcode, bool isFP,
3035 SDValue &LHS, SDValue &RHS, SelectionDAG &DAG) {
3037 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS)) {
3038 if (SetCCOpcode == ISD::SETGT && RHSC->isAllOnesValue()) {
3039 // X > -1 -> X == 0, jump !sign.
3040 RHS = DAG.getConstant(0, RHS.getValueType());
3041 return X86::COND_NS;
3042 } else if (SetCCOpcode == ISD::SETLT && RHSC->isNullValue()) {
3043 // X < 0 -> X == 0, jump on sign.
3045 } else if (SetCCOpcode == ISD::SETLT && RHSC->getZExtValue() == 1) {
3047 RHS = DAG.getConstant(0, RHS.getValueType());
3048 return X86::COND_LE;
3052 switch (SetCCOpcode) {
3053 default: llvm_unreachable("Invalid integer condition!");
3054 case ISD::SETEQ: return X86::COND_E;
3055 case ISD::SETGT: return X86::COND_G;
3056 case ISD::SETGE: return X86::COND_GE;
3057 case ISD::SETLT: return X86::COND_L;
3058 case ISD::SETLE: return X86::COND_LE;
3059 case ISD::SETNE: return X86::COND_NE;
3060 case ISD::SETULT: return X86::COND_B;
3061 case ISD::SETUGT: return X86::COND_A;
3062 case ISD::SETULE: return X86::COND_BE;
3063 case ISD::SETUGE: return X86::COND_AE;
3067 // First determine if it is required or is profitable to flip the operands.
3069 // If LHS is a foldable load, but RHS is not, flip the condition.
3070 if (ISD::isNON_EXTLoad(LHS.getNode()) &&
3071 !ISD::isNON_EXTLoad(RHS.getNode())) {
3072 SetCCOpcode = getSetCCSwappedOperands(SetCCOpcode);
3073 std::swap(LHS, RHS);
3076 switch (SetCCOpcode) {
3082 std::swap(LHS, RHS);
3086 // On a floating point condition, the flags are set as follows:
3088 // 0 | 0 | 0 | X > Y
3089 // 0 | 0 | 1 | X < Y
3090 // 1 | 0 | 0 | X == Y
3091 // 1 | 1 | 1 | unordered
3092 switch (SetCCOpcode) {
3093 default: llvm_unreachable("Condcode should be pre-legalized away");
3095 case ISD::SETEQ: return X86::COND_E;
3096 case ISD::SETOLT: // flipped
3098 case ISD::SETGT: return X86::COND_A;
3099 case ISD::SETOLE: // flipped
3101 case ISD::SETGE: return X86::COND_AE;
3102 case ISD::SETUGT: // flipped
3104 case ISD::SETLT: return X86::COND_B;
3105 case ISD::SETUGE: // flipped
3107 case ISD::SETLE: return X86::COND_BE;
3109 case ISD::SETNE: return X86::COND_NE;
3110 case ISD::SETUO: return X86::COND_P;
3111 case ISD::SETO: return X86::COND_NP;
3113 case ISD::SETUNE: return X86::COND_INVALID;
3117 /// hasFPCMov - is there a floating point cmov for the specific X86 condition
3118 /// code. Current x86 isa includes the following FP cmov instructions:
3119 /// fcmovb, fcomvbe, fcomve, fcmovu, fcmovae, fcmova, fcmovne, fcmovnu.
3120 static bool hasFPCMov(unsigned X86CC) {
3136 /// isFPImmLegal - Returns true if the target can instruction select the
3137 /// specified FP immediate natively. If false, the legalizer will
3138 /// materialize the FP immediate as a load from a constant pool.
3139 bool X86TargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
3140 for (unsigned i = 0, e = LegalFPImmediates.size(); i != e; ++i) {
3141 if (Imm.bitwiseIsEqual(LegalFPImmediates[i]))
3147 /// isUndefOrInRange - Return true if Val is undef or if its value falls within
3148 /// the specified range (L, H].
3149 static bool isUndefOrInRange(int Val, int Low, int Hi) {
3150 return (Val < 0) || (Val >= Low && Val < Hi);
3153 /// isUndefOrEqual - Val is either less than zero (undef) or equal to the
3154 /// specified value.
3155 static bool isUndefOrEqual(int Val, int CmpVal) {
3156 if (Val < 0 || Val == CmpVal)
3161 /// isSequentialOrUndefInRange - Return true if every element in Mask, begining
3162 /// from position Pos and ending in Pos+Size, falls within the specified
3163 /// sequential range (L, L+Pos]. or is undef.
3164 static bool isSequentialOrUndefInRange(ArrayRef<int> Mask,
3165 int Pos, int Size, int Low) {
3166 for (int i = Pos, e = Pos+Size; i != e; ++i, ++Low)
3167 if (!isUndefOrEqual(Mask[i], Low))
3172 /// isPSHUFDMask - Return true if the node specifies a shuffle of elements that
3173 /// is suitable for input to PSHUFD or PSHUFW. That is, it doesn't reference
3174 /// the second operand.
3175 static bool isPSHUFDMask(ArrayRef<int> Mask, EVT VT) {
3176 if (VT == MVT::v4f32 || VT == MVT::v4i32 )
3177 return (Mask[0] < 4 && Mask[1] < 4 && Mask[2] < 4 && Mask[3] < 4);
3178 if (VT == MVT::v2f64 || VT == MVT::v2i64)
3179 return (Mask[0] < 2 && Mask[1] < 2);
3183 bool X86::isPSHUFDMask(ShuffleVectorSDNode *N) {
3184 return ::isPSHUFDMask(N->getMask(), N->getValueType(0));
3187 /// isPSHUFHWMask - Return true if the node specifies a shuffle of elements that
3188 /// is suitable for input to PSHUFHW.
3189 static bool isPSHUFHWMask(ArrayRef<int> Mask, EVT VT) {
3190 if (VT != MVT::v8i16)
3193 // Lower quadword copied in order or undef.
3194 if (!isSequentialOrUndefInRange(Mask, 0, 4, 0))
3197 // Upper quadword shuffled.
3198 for (unsigned i = 4; i != 8; ++i)
3199 if (Mask[i] >= 0 && (Mask[i] < 4 || Mask[i] > 7))
3205 bool X86::isPSHUFHWMask(ShuffleVectorSDNode *N) {
3206 return ::isPSHUFHWMask(N->getMask(), N->getValueType(0));
3209 /// isPSHUFLWMask - Return true if the node specifies a shuffle of elements that
3210 /// is suitable for input to PSHUFLW.
3211 static bool isPSHUFLWMask(ArrayRef<int> Mask, EVT VT) {
3212 if (VT != MVT::v8i16)
3215 // Upper quadword copied in order.
3216 if (!isSequentialOrUndefInRange(Mask, 4, 4, 4))
3219 // Lower quadword shuffled.
3220 for (unsigned i = 0; i != 4; ++i)
3227 bool X86::isPSHUFLWMask(ShuffleVectorSDNode *N) {
3228 return ::isPSHUFLWMask(N->getMask(), N->getValueType(0));
3231 /// isPALIGNRMask - Return true if the node specifies a shuffle of elements that
3232 /// is suitable for input to PALIGNR.
3233 static bool isPALIGNRMask(ArrayRef<int> Mask, EVT VT,
3234 const X86Subtarget *Subtarget) {
3235 if ((VT.getSizeInBits() == 128 && !Subtarget->hasSSSE3()) ||
3236 (VT.getSizeInBits() == 256 && !Subtarget->hasAVX2()))
3239 unsigned NumElts = VT.getVectorNumElements();
3240 unsigned NumLanes = VT.getSizeInBits()/128;
3241 unsigned NumLaneElts = NumElts/NumLanes;
3243 // Do not handle 64-bit element shuffles with palignr.
3244 if (NumLaneElts == 2)
3247 for (unsigned l = 0; l != NumElts; l+=NumLaneElts) {
3249 for (i = 0; i != NumLaneElts; ++i) {
3254 // Lane is all undef, go to next lane
3255 if (i == NumLaneElts)
3258 int Start = Mask[i+l];
3260 // Make sure its in this lane in one of the sources
3261 if (!isUndefOrInRange(Start, l, l+NumLaneElts) &&
3262 !isUndefOrInRange(Start, l+NumElts, l+NumElts+NumLaneElts))
3265 // If not lane 0, then we must match lane 0
3266 if (l != 0 && Mask[i] >= 0 && !isUndefOrEqual(Start, Mask[i]+l))
3269 // Correct second source to be contiguous with first source
3270 if (Start >= (int)NumElts)
3271 Start -= NumElts - NumLaneElts;
3273 // Make sure we're shifting in the right direction.
3274 if (Start <= (int)(i+l))
3279 // Check the rest of the elements to see if they are consecutive.
3280 for (++i; i != NumLaneElts; ++i) {
3281 int Idx = Mask[i+l];
3283 // Make sure its in this lane
3284 if (!isUndefOrInRange(Idx, l, l+NumLaneElts) &&
3285 !isUndefOrInRange(Idx, l+NumElts, l+NumElts+NumLaneElts))
3288 // If not lane 0, then we must match lane 0
3289 if (l != 0 && Mask[i] >= 0 && !isUndefOrEqual(Idx, Mask[i]+l))
3292 if (Idx >= (int)NumElts)
3293 Idx -= NumElts - NumLaneElts;
3295 if (!isUndefOrEqual(Idx, Start+i))
3304 /// CommuteVectorShuffleMask - Change values in a shuffle permute mask assuming
3305 /// the two vector operands have swapped position.
3306 static void CommuteVectorShuffleMask(SmallVectorImpl<int> &Mask,
3307 unsigned NumElems) {
3308 for (unsigned i = 0; i != NumElems; ++i) {
3312 else if (idx < (int)NumElems)
3313 Mask[i] = idx + NumElems;
3315 Mask[i] = idx - NumElems;
3319 /// isSHUFPMask - Return true if the specified VECTOR_SHUFFLE operand
3320 /// specifies a shuffle of elements that is suitable for input to 128/256-bit
3321 /// SHUFPS and SHUFPD. If Commuted is true, then it checks for sources to be
3322 /// reverse of what x86 shuffles want.
3323 static bool isSHUFPMask(ArrayRef<int> Mask, EVT VT, bool HasAVX,
3324 bool Commuted = false) {
3325 if (!HasAVX && VT.getSizeInBits() == 256)
3328 unsigned NumElems = VT.getVectorNumElements();
3329 unsigned NumLanes = VT.getSizeInBits()/128;
3330 unsigned NumLaneElems = NumElems/NumLanes;
3332 if (NumLaneElems != 2 && NumLaneElems != 4)
3335 // VSHUFPSY divides the resulting vector into 4 chunks.
3336 // The sources are also splitted into 4 chunks, and each destination
3337 // chunk must come from a different source chunk.
3339 // SRC1 => X7 X6 X5 X4 X3 X2 X1 X0
3340 // SRC2 => Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y9
3342 // DST => Y7..Y4, Y7..Y4, X7..X4, X7..X4,
3343 // Y3..Y0, Y3..Y0, X3..X0, X3..X0
3345 // VSHUFPDY divides the resulting vector into 4 chunks.
3346 // The sources are also splitted into 4 chunks, and each destination
3347 // chunk must come from a different source chunk.
3349 // SRC1 => X3 X2 X1 X0
3350 // SRC2 => Y3 Y2 Y1 Y0
3352 // DST => Y3..Y2, X3..X2, Y1..Y0, X1..X0
3354 unsigned HalfLaneElems = NumLaneElems/2;
3355 for (unsigned l = 0; l != NumElems; l += NumLaneElems) {
3356 for (unsigned i = 0; i != NumLaneElems; ++i) {
3357 int Idx = Mask[i+l];
3358 unsigned RngStart = l + ((Commuted == (i<HalfLaneElems)) ? NumElems : 0);
3359 if (!isUndefOrInRange(Idx, RngStart, RngStart+NumLaneElems))
3361 // For VSHUFPSY, the mask of the second half must be the same as the
3362 // first but with the appropriate offsets. This works in the same way as
3363 // VPERMILPS works with masks.
3364 if (NumElems != 8 || l == 0 || Mask[i] < 0)
3366 if (!isUndefOrEqual(Idx, Mask[i]+l))
3374 bool X86::isSHUFPMask(ShuffleVectorSDNode *N, bool HasAVX) {
3375 return ::isSHUFPMask(N->getMask(), N->getValueType(0), HasAVX);
3378 /// isMOVHLPSMask - Return true if the specified VECTOR_SHUFFLE operand
3379 /// specifies a shuffle of elements that is suitable for input to MOVHLPS.
3380 bool X86::isMOVHLPSMask(ShuffleVectorSDNode *N) {
3381 EVT VT = N->getValueType(0);
3382 unsigned NumElems = VT.getVectorNumElements();
3384 if (VT.getSizeInBits() != 128)
3390 // Expect bit0 == 6, bit1 == 7, bit2 == 2, bit3 == 3
3391 return isUndefOrEqual(N->getMaskElt(0), 6) &&
3392 isUndefOrEqual(N->getMaskElt(1), 7) &&
3393 isUndefOrEqual(N->getMaskElt(2), 2) &&
3394 isUndefOrEqual(N->getMaskElt(3), 3);
3397 /// isMOVHLPS_v_undef_Mask - Special case of isMOVHLPSMask for canonical form
3398 /// of vector_shuffle v, v, <2, 3, 2, 3>, i.e. vector_shuffle v, undef,
3400 bool X86::isMOVHLPS_v_undef_Mask(ShuffleVectorSDNode *N) {
3401 EVT VT = N->getValueType(0);
3402 unsigned NumElems = VT.getVectorNumElements();
3404 if (VT.getSizeInBits() != 128)
3410 return isUndefOrEqual(N->getMaskElt(0), 2) &&
3411 isUndefOrEqual(N->getMaskElt(1), 3) &&
3412 isUndefOrEqual(N->getMaskElt(2), 2) &&
3413 isUndefOrEqual(N->getMaskElt(3), 3);
3416 /// isMOVLPMask - Return true if the specified VECTOR_SHUFFLE operand
3417 /// specifies a shuffle of elements that is suitable for input to MOVLP{S|D}.
3418 bool X86::isMOVLPMask(ShuffleVectorSDNode *N) {
3419 EVT VT = N->getValueType(0);
3421 if (VT.getSizeInBits() != 128)
3424 unsigned NumElems = N->getValueType(0).getVectorNumElements();
3426 if (NumElems != 2 && NumElems != 4)
3429 for (unsigned i = 0; i < NumElems/2; ++i)
3430 if (!isUndefOrEqual(N->getMaskElt(i), i + NumElems))
3433 for (unsigned i = NumElems/2; i < NumElems; ++i)
3434 if (!isUndefOrEqual(N->getMaskElt(i), i))
3440 /// isMOVLHPSMask - Return true if the specified VECTOR_SHUFFLE operand
3441 /// specifies a shuffle of elements that is suitable for input to MOVLHPS.
3442 bool X86::isMOVLHPSMask(ShuffleVectorSDNode *N) {
3443 unsigned NumElems = N->getValueType(0).getVectorNumElements();
3445 if ((NumElems != 2 && NumElems != 4)
3446 || N->getValueType(0).getSizeInBits() > 128)
3449 for (unsigned i = 0; i < NumElems/2; ++i)
3450 if (!isUndefOrEqual(N->getMaskElt(i), i))
3453 for (unsigned i = 0; i < NumElems/2; ++i)
3454 if (!isUndefOrEqual(N->getMaskElt(i + NumElems/2), i + NumElems))
3460 /// isUNPCKLMask - Return true if the specified VECTOR_SHUFFLE operand
3461 /// specifies a shuffle of elements that is suitable for input to UNPCKL.
3462 static bool isUNPCKLMask(ArrayRef<int> Mask, EVT VT,
3463 bool HasAVX2, bool V2IsSplat = false) {
3464 unsigned NumElts = VT.getVectorNumElements();
3466 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3467 "Unsupported vector type for unpckh");
3469 if (VT.getSizeInBits() == 256 && NumElts != 4 && NumElts != 8 &&
3470 (!HasAVX2 || (NumElts != 16 && NumElts != 32)))
3473 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3474 // independently on 128-bit lanes.
3475 unsigned NumLanes = VT.getSizeInBits()/128;
3476 unsigned NumLaneElts = NumElts/NumLanes;
3478 for (unsigned l = 0; l != NumLanes; ++l) {
3479 for (unsigned i = l*NumLaneElts, j = l*NumLaneElts;
3480 i != (l+1)*NumLaneElts;
3483 int BitI1 = Mask[i+1];
3484 if (!isUndefOrEqual(BitI, j))
3487 if (!isUndefOrEqual(BitI1, NumElts))
3490 if (!isUndefOrEqual(BitI1, j + NumElts))
3499 bool X86::isUNPCKLMask(ShuffleVectorSDNode *N, bool HasAVX2, bool V2IsSplat) {
3500 return ::isUNPCKLMask(N->getMask(), N->getValueType(0), HasAVX2, V2IsSplat);
3503 /// isUNPCKHMask - Return true if the specified VECTOR_SHUFFLE operand
3504 /// specifies a shuffle of elements that is suitable for input to UNPCKH.
3505 static bool isUNPCKHMask(ArrayRef<int> Mask, EVT VT,
3506 bool HasAVX2, bool V2IsSplat = false) {
3507 unsigned NumElts = VT.getVectorNumElements();
3509 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3510 "Unsupported vector type for unpckh");
3512 if (VT.getSizeInBits() == 256 && NumElts != 4 && NumElts != 8 &&
3513 (!HasAVX2 || (NumElts != 16 && NumElts != 32)))
3516 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3517 // independently on 128-bit lanes.
3518 unsigned NumLanes = VT.getSizeInBits()/128;
3519 unsigned NumLaneElts = NumElts/NumLanes;
3521 for (unsigned l = 0; l != NumLanes; ++l) {
3522 for (unsigned i = l*NumLaneElts, j = (l*NumLaneElts)+NumLaneElts/2;
3523 i != (l+1)*NumLaneElts; i += 2, ++j) {
3525 int BitI1 = Mask[i+1];
3526 if (!isUndefOrEqual(BitI, j))
3529 if (isUndefOrEqual(BitI1, NumElts))
3532 if (!isUndefOrEqual(BitI1, j+NumElts))
3540 bool X86::isUNPCKHMask(ShuffleVectorSDNode *N, bool HasAVX2, bool V2IsSplat) {
3541 return ::isUNPCKHMask(N->getMask(), N->getValueType(0), HasAVX2, V2IsSplat);
3544 /// isUNPCKL_v_undef_Mask - Special case of isUNPCKLMask for canonical form
3545 /// of vector_shuffle v, v, <0, 4, 1, 5>, i.e. vector_shuffle v, undef,
3547 static bool isUNPCKL_v_undef_Mask(ArrayRef<int> Mask, EVT VT,
3549 unsigned NumElts = VT.getVectorNumElements();
3551 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3552 "Unsupported vector type for unpckh");
3554 if (VT.getSizeInBits() == 256 && NumElts != 4 && NumElts != 8 &&
3555 (!HasAVX2 || (NumElts != 16 && NumElts != 32)))
3558 // For 256-bit i64/f64, use MOVDDUPY instead, so reject the matching pattern
3559 // FIXME: Need a better way to get rid of this, there's no latency difference
3560 // between UNPCKLPD and MOVDDUP, the later should always be checked first and
3561 // the former later. We should also remove the "_undef" special mask.
3562 if (NumElts == 4 && VT.getSizeInBits() == 256)
3565 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3566 // independently on 128-bit lanes.
3567 unsigned NumLanes = VT.getSizeInBits()/128;
3568 unsigned NumLaneElts = NumElts/NumLanes;
3570 for (unsigned l = 0; l != NumLanes; ++l) {
3571 for (unsigned i = l*NumLaneElts, j = l*NumLaneElts;
3572 i != (l+1)*NumLaneElts;
3575 int BitI1 = Mask[i+1];
3577 if (!isUndefOrEqual(BitI, j))
3579 if (!isUndefOrEqual(BitI1, j))
3587 bool X86::isUNPCKL_v_undef_Mask(ShuffleVectorSDNode *N, bool HasAVX2) {
3588 return ::isUNPCKL_v_undef_Mask(N->getMask(), N->getValueType(0), HasAVX2);
3591 /// isUNPCKH_v_undef_Mask - Special case of isUNPCKHMask for canonical form
3592 /// of vector_shuffle v, v, <2, 6, 3, 7>, i.e. vector_shuffle v, undef,
3594 static bool isUNPCKH_v_undef_Mask(ArrayRef<int> Mask, EVT VT, bool HasAVX2) {
3595 unsigned NumElts = VT.getVectorNumElements();
3597 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3598 "Unsupported vector type for unpckh");
3600 if (VT.getSizeInBits() == 256 && NumElts != 4 && NumElts != 8 &&
3601 (!HasAVX2 || (NumElts != 16 && NumElts != 32)))
3604 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3605 // independently on 128-bit lanes.
3606 unsigned NumLanes = VT.getSizeInBits()/128;
3607 unsigned NumLaneElts = NumElts/NumLanes;
3609 for (unsigned l = 0; l != NumLanes; ++l) {
3610 for (unsigned i = l*NumLaneElts, j = (l*NumLaneElts)+NumLaneElts/2;
3611 i != (l+1)*NumLaneElts; i += 2, ++j) {
3613 int BitI1 = Mask[i+1];
3614 if (!isUndefOrEqual(BitI, j))
3616 if (!isUndefOrEqual(BitI1, j))
3623 bool X86::isUNPCKH_v_undef_Mask(ShuffleVectorSDNode *N, bool HasAVX2) {
3624 return ::isUNPCKH_v_undef_Mask(N->getMask(), N->getValueType(0), HasAVX2);
3627 /// isMOVLMask - Return true if the specified VECTOR_SHUFFLE operand
3628 /// specifies a shuffle of elements that is suitable for input to MOVSS,
3629 /// MOVSD, and MOVD, i.e. setting the lowest element.
3630 static bool isMOVLMask(ArrayRef<int> Mask, EVT VT) {
3631 if (VT.getVectorElementType().getSizeInBits() < 32)
3633 if (VT.getSizeInBits() == 256)
3636 unsigned NumElts = VT.getVectorNumElements();
3638 if (!isUndefOrEqual(Mask[0], NumElts))
3641 for (unsigned i = 1; i != NumElts; ++i)
3642 if (!isUndefOrEqual(Mask[i], i))
3648 bool X86::isMOVLMask(ShuffleVectorSDNode *N) {
3649 return ::isMOVLMask(N->getMask(), N->getValueType(0));
3652 /// isVPERM2X128Mask - Match 256-bit shuffles where the elements are considered
3653 /// as permutations between 128-bit chunks or halves. As an example: this
3655 /// vector_shuffle <4, 5, 6, 7, 12, 13, 14, 15>
3656 /// The first half comes from the second half of V1 and the second half from the
3657 /// the second half of V2.
3658 static bool isVPERM2X128Mask(ArrayRef<int> Mask, EVT VT, bool HasAVX) {
3659 if (!HasAVX || VT.getSizeInBits() != 256)
3662 // The shuffle result is divided into half A and half B. In total the two
3663 // sources have 4 halves, namely: C, D, E, F. The final values of A and
3664 // B must come from C, D, E or F.
3665 unsigned HalfSize = VT.getVectorNumElements()/2;
3666 bool MatchA = false, MatchB = false;
3668 // Check if A comes from one of C, D, E, F.
3669 for (unsigned Half = 0; Half != 4; ++Half) {
3670 if (isSequentialOrUndefInRange(Mask, 0, HalfSize, Half*HalfSize)) {
3676 // Check if B comes from one of C, D, E, F.
3677 for (unsigned Half = 0; Half != 4; ++Half) {
3678 if (isSequentialOrUndefInRange(Mask, HalfSize, HalfSize, Half*HalfSize)) {
3684 return MatchA && MatchB;
3687 /// getShuffleVPERM2X128Immediate - Return the appropriate immediate to shuffle
3688 /// the specified VECTOR_MASK mask with VPERM2F128/VPERM2I128 instructions.
3689 static unsigned getShuffleVPERM2X128Immediate(ShuffleVectorSDNode *SVOp) {
3690 EVT VT = SVOp->getValueType(0);
3692 unsigned HalfSize = VT.getVectorNumElements()/2;
3694 unsigned FstHalf = 0, SndHalf = 0;
3695 for (unsigned i = 0; i < HalfSize; ++i) {
3696 if (SVOp->getMaskElt(i) > 0) {
3697 FstHalf = SVOp->getMaskElt(i)/HalfSize;
3701 for (unsigned i = HalfSize; i < HalfSize*2; ++i) {
3702 if (SVOp->getMaskElt(i) > 0) {
3703 SndHalf = SVOp->getMaskElt(i)/HalfSize;
3708 return (FstHalf | (SndHalf << 4));
3711 /// isVPERMILPMask - Return true if the specified VECTOR_SHUFFLE operand
3712 /// specifies a shuffle of elements that is suitable for input to VPERMILPD*.
3713 /// Note that VPERMIL mask matching is different depending whether theunderlying
3714 /// type is 32 or 64. In the VPERMILPS the high half of the mask should point
3715 /// to the same elements of the low, but to the higher half of the source.
3716 /// In VPERMILPD the two lanes could be shuffled independently of each other
3717 /// with the same restriction that lanes can't be crossed.
3718 static bool isVPERMILPMask(ArrayRef<int> Mask, EVT VT, bool HasAVX) {
3722 unsigned NumElts = VT.getVectorNumElements();
3723 // Only match 256-bit with 32/64-bit types
3724 if (VT.getSizeInBits() != 256 || (NumElts != 4 && NumElts != 8))
3727 unsigned NumLanes = VT.getSizeInBits()/128;
3728 unsigned LaneSize = NumElts/NumLanes;
3729 for (unsigned l = 0; l != NumElts; l += LaneSize) {
3730 for (unsigned i = 0; i != LaneSize; ++i) {
3731 if (!isUndefOrInRange(Mask[i+l], l, l+LaneSize))
3733 if (NumElts != 8 || l == 0)
3735 // VPERMILPS handling
3738 if (!isUndefOrEqual(Mask[i+l], Mask[i]+l))
3746 /// isCommutedMOVL - Returns true if the shuffle mask is except the reverse
3747 /// of what x86 movss want. X86 movs requires the lowest element to be lowest
3748 /// element of vector 2 and the other elements to come from vector 1 in order.
3749 static bool isCommutedMOVLMask(ArrayRef<int> Mask, EVT VT,
3750 bool V2IsSplat = false, bool V2IsUndef = false) {
3751 unsigned NumOps = VT.getVectorNumElements();
3752 if (NumOps != 2 && NumOps != 4 && NumOps != 8 && NumOps != 16)
3755 if (!isUndefOrEqual(Mask[0], 0))
3758 for (unsigned i = 1; i != NumOps; ++i)
3759 if (!(isUndefOrEqual(Mask[i], i+NumOps) ||
3760 (V2IsUndef && isUndefOrInRange(Mask[i], NumOps, NumOps*2)) ||
3761 (V2IsSplat && isUndefOrEqual(Mask[i], NumOps))))
3767 static bool isCommutedMOVL(ShuffleVectorSDNode *N, bool V2IsSplat = false,
3768 bool V2IsUndef = false) {
3769 return isCommutedMOVLMask(N->getMask(), N->getValueType(0),
3770 V2IsSplat, V2IsUndef);
3773 /// isMOVSHDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3774 /// specifies a shuffle of elements that is suitable for input to MOVSHDUP.
3775 /// Masks to match: <1, 1, 3, 3> or <1, 1, 3, 3, 5, 5, 7, 7>
3776 bool X86::isMOVSHDUPMask(ShuffleVectorSDNode *N,
3777 const X86Subtarget *Subtarget) {
3778 if (!Subtarget->hasSSE3())
3781 // The second vector must be undef
3782 if (N->getOperand(1).getOpcode() != ISD::UNDEF)
3785 EVT VT = N->getValueType(0);
3786 unsigned NumElems = VT.getVectorNumElements();
3788 if ((VT.getSizeInBits() == 128 && NumElems != 4) ||
3789 (VT.getSizeInBits() == 256 && NumElems != 8))
3792 // "i+1" is the value the indexed mask element must have
3793 for (unsigned i = 0; i < NumElems; i += 2)
3794 if (!isUndefOrEqual(N->getMaskElt(i), i+1) ||
3795 !isUndefOrEqual(N->getMaskElt(i+1), i+1))
3801 /// isMOVSLDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3802 /// specifies a shuffle of elements that is suitable for input to MOVSLDUP.
3803 /// Masks to match: <0, 0, 2, 2> or <0, 0, 2, 2, 4, 4, 6, 6>
3804 bool X86::isMOVSLDUPMask(ShuffleVectorSDNode *N,
3805 const X86Subtarget *Subtarget) {
3806 if (!Subtarget->hasSSE3())
3809 // The second vector must be undef
3810 if (N->getOperand(1).getOpcode() != ISD::UNDEF)
3813 EVT VT = N->getValueType(0);
3814 unsigned NumElems = VT.getVectorNumElements();
3816 if ((VT.getSizeInBits() == 128 && NumElems != 4) ||
3817 (VT.getSizeInBits() == 256 && NumElems != 8))
3820 // "i" is the value the indexed mask element must have
3821 for (unsigned i = 0; i != NumElems; i += 2)
3822 if (!isUndefOrEqual(N->getMaskElt(i), i) ||
3823 !isUndefOrEqual(N->getMaskElt(i+1), i))
3829 /// isMOVDDUPYMask - Return true if the specified VECTOR_SHUFFLE operand
3830 /// specifies a shuffle of elements that is suitable for input to 256-bit
3831 /// version of MOVDDUP.
3832 static bool isMOVDDUPYMask(ArrayRef<int> Mask, EVT VT, bool HasAVX) {
3833 unsigned NumElts = VT.getVectorNumElements();
3835 if (!HasAVX || VT.getSizeInBits() != 256 || NumElts != 4)
3838 for (unsigned i = 0; i != NumElts/2; ++i)
3839 if (!isUndefOrEqual(Mask[i], 0))
3841 for (unsigned i = NumElts/2; i != NumElts; ++i)
3842 if (!isUndefOrEqual(Mask[i], NumElts/2))
3847 /// isMOVDDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3848 /// specifies a shuffle of elements that is suitable for input to 128-bit
3849 /// version of MOVDDUP.
3850 bool X86::isMOVDDUPMask(ShuffleVectorSDNode *N) {
3851 EVT VT = N->getValueType(0);
3853 if (VT.getSizeInBits() != 128)
3856 unsigned e = VT.getVectorNumElements() / 2;
3857 for (unsigned i = 0; i != e; ++i)
3858 if (!isUndefOrEqual(N->getMaskElt(i), i))
3860 for (unsigned i = 0; i != e; ++i)
3861 if (!isUndefOrEqual(N->getMaskElt(e+i), i))
3866 /// isVEXTRACTF128Index - Return true if the specified
3867 /// EXTRACT_SUBVECTOR operand specifies a vector extract that is
3868 /// suitable for input to VEXTRACTF128.
3869 bool X86::isVEXTRACTF128Index(SDNode *N) {
3870 if (!isa<ConstantSDNode>(N->getOperand(1).getNode()))
3873 // The index should be aligned on a 128-bit boundary.
3875 cast<ConstantSDNode>(N->getOperand(1).getNode())->getZExtValue();
3877 unsigned VL = N->getValueType(0).getVectorNumElements();
3878 unsigned VBits = N->getValueType(0).getSizeInBits();
3879 unsigned ElSize = VBits / VL;
3880 bool Result = (Index * ElSize) % 128 == 0;
3885 /// isVINSERTF128Index - Return true if the specified INSERT_SUBVECTOR
3886 /// operand specifies a subvector insert that is suitable for input to
3888 bool X86::isVINSERTF128Index(SDNode *N) {
3889 if (!isa<ConstantSDNode>(N->getOperand(2).getNode()))
3892 // The index should be aligned on a 128-bit boundary.
3894 cast<ConstantSDNode>(N->getOperand(2).getNode())->getZExtValue();
3896 unsigned VL = N->getValueType(0).getVectorNumElements();
3897 unsigned VBits = N->getValueType(0).getSizeInBits();
3898 unsigned ElSize = VBits / VL;
3899 bool Result = (Index * ElSize) % 128 == 0;
3904 /// getShuffleSHUFImmediate - Return the appropriate immediate to shuffle
3905 /// the specified VECTOR_SHUFFLE mask with PSHUF* and SHUFP* instructions.
3906 /// Handles 128-bit and 256-bit.
3907 unsigned X86::getShuffleSHUFImmediate(ShuffleVectorSDNode *N) {
3908 EVT VT = N->getValueType(0);
3910 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3911 "Unsupported vector type for PSHUF/SHUFP");
3913 // Handle 128 and 256-bit vector lengths. AVX defines PSHUF/SHUFP to operate
3914 // independently on 128-bit lanes.
3915 unsigned NumElts = VT.getVectorNumElements();
3916 unsigned NumLanes = VT.getSizeInBits()/128;
3917 unsigned NumLaneElts = NumElts/NumLanes;
3919 assert((NumLaneElts == 2 || NumLaneElts == 4) &&
3920 "Only supports 2 or 4 elements per lane");
3922 unsigned Shift = (NumLaneElts == 4) ? 1 : 0;
3924 for (unsigned i = 0; i != NumElts; ++i) {
3925 int Elt = N->getMaskElt(i);
3926 if (Elt < 0) continue;
3928 unsigned ShAmt = i << Shift;
3929 if (ShAmt >= 8) ShAmt -= 8;
3930 Mask |= Elt << ShAmt;
3936 /// getShufflePSHUFHWImmediate - Return the appropriate immediate to shuffle
3937 /// the specified VECTOR_SHUFFLE mask with the PSHUFHW instruction.
3938 unsigned X86::getShufflePSHUFHWImmediate(SDNode *N) {
3939 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
3941 // 8 nodes, but we only care about the last 4.
3942 for (unsigned i = 7; i >= 4; --i) {
3943 int Val = SVOp->getMaskElt(i);
3952 /// getShufflePSHUFLWImmediate - Return the appropriate immediate to shuffle
3953 /// the specified VECTOR_SHUFFLE mask with the PSHUFLW instruction.
3954 unsigned X86::getShufflePSHUFLWImmediate(SDNode *N) {
3955 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
3957 // 8 nodes, but we only care about the first 4.
3958 for (int i = 3; i >= 0; --i) {
3959 int Val = SVOp->getMaskElt(i);
3968 /// getShufflePALIGNRImmediate - Return the appropriate immediate to shuffle
3969 /// the specified VECTOR_SHUFFLE mask with the PALIGNR instruction.
3970 static unsigned getShufflePALIGNRImmediate(ShuffleVectorSDNode *SVOp) {
3971 EVT VT = SVOp->getValueType(0);
3972 unsigned EltSize = VT.getVectorElementType().getSizeInBits() >> 3;
3974 unsigned NumElts = VT.getVectorNumElements();
3975 unsigned NumLanes = VT.getSizeInBits()/128;
3976 unsigned NumLaneElts = NumElts/NumLanes;
3980 for (i = 0; i != NumElts; ++i) {
3981 Val = SVOp->getMaskElt(i);
3985 if (Val >= (int)NumElts)
3986 Val -= NumElts - NumLaneElts;
3988 assert(Val - i > 0 && "PALIGNR imm should be positive");
3989 return (Val - i) * EltSize;
3992 /// getExtractVEXTRACTF128Immediate - Return the appropriate immediate
3993 /// to extract the specified EXTRACT_SUBVECTOR index with VEXTRACTF128
3995 unsigned X86::getExtractVEXTRACTF128Immediate(SDNode *N) {
3996 if (!isa<ConstantSDNode>(N->getOperand(1).getNode()))
3997 llvm_unreachable("Illegal extract subvector for VEXTRACTF128");
4000 cast<ConstantSDNode>(N->getOperand(1).getNode())->getZExtValue();
4002 EVT VecVT = N->getOperand(0).getValueType();
4003 EVT ElVT = VecVT.getVectorElementType();
4005 unsigned NumElemsPerChunk = 128 / ElVT.getSizeInBits();
4006 return Index / NumElemsPerChunk;
4009 /// getInsertVINSERTF128Immediate - Return the appropriate immediate
4010 /// to insert at the specified INSERT_SUBVECTOR index with VINSERTF128
4012 unsigned X86::getInsertVINSERTF128Immediate(SDNode *N) {
4013 if (!isa<ConstantSDNode>(N->getOperand(2).getNode()))
4014 llvm_unreachable("Illegal insert subvector for VINSERTF128");
4017 cast<ConstantSDNode>(N->getOperand(2).getNode())->getZExtValue();
4019 EVT VecVT = N->getValueType(0);
4020 EVT ElVT = VecVT.getVectorElementType();
4022 unsigned NumElemsPerChunk = 128 / ElVT.getSizeInBits();
4023 return Index / NumElemsPerChunk;
4026 /// isZeroNode - Returns true if Elt is a constant zero or a floating point
4028 bool X86::isZeroNode(SDValue Elt) {
4029 return ((isa<ConstantSDNode>(Elt) &&
4030 cast<ConstantSDNode>(Elt)->isNullValue()) ||
4031 (isa<ConstantFPSDNode>(Elt) &&
4032 cast<ConstantFPSDNode>(Elt)->getValueAPF().isPosZero()));
4035 /// CommuteVectorShuffle - Swap vector_shuffle operands as well as values in
4036 /// their permute mask.
4037 static SDValue CommuteVectorShuffle(ShuffleVectorSDNode *SVOp,
4038 SelectionDAG &DAG) {
4039 EVT VT = SVOp->getValueType(0);
4040 unsigned NumElems = VT.getVectorNumElements();
4041 SmallVector<int, 8> MaskVec;
4043 for (unsigned i = 0; i != NumElems; ++i) {
4044 int idx = SVOp->getMaskElt(i);
4046 MaskVec.push_back(idx);
4047 else if (idx < (int)NumElems)
4048 MaskVec.push_back(idx + NumElems);
4050 MaskVec.push_back(idx - NumElems);
4052 return DAG.getVectorShuffle(VT, SVOp->getDebugLoc(), SVOp->getOperand(1),
4053 SVOp->getOperand(0), &MaskVec[0]);
4056 /// ShouldXformToMOVHLPS - Return true if the node should be transformed to
4057 /// match movhlps. The lower half elements should come from upper half of
4058 /// V1 (and in order), and the upper half elements should come from the upper
4059 /// half of V2 (and in order).
4060 static bool ShouldXformToMOVHLPS(ShuffleVectorSDNode *Op) {
4061 EVT VT = Op->getValueType(0);
4062 if (VT.getSizeInBits() != 128)
4064 if (VT.getVectorNumElements() != 4)
4066 for (unsigned i = 0, e = 2; i != e; ++i)
4067 if (!isUndefOrEqual(Op->getMaskElt(i), i+2))
4069 for (unsigned i = 2; i != 4; ++i)
4070 if (!isUndefOrEqual(Op->getMaskElt(i), i+4))
4075 /// isScalarLoadToVector - Returns true if the node is a scalar load that
4076 /// is promoted to a vector. It also returns the LoadSDNode by reference if
4078 static bool isScalarLoadToVector(SDNode *N, LoadSDNode **LD = NULL) {
4079 if (N->getOpcode() != ISD::SCALAR_TO_VECTOR)
4081 N = N->getOperand(0).getNode();
4082 if (!ISD::isNON_EXTLoad(N))
4085 *LD = cast<LoadSDNode>(N);
4089 // Test whether the given value is a vector value which will be legalized
4091 static bool WillBeConstantPoolLoad(SDNode *N) {
4092 if (N->getOpcode() != ISD::BUILD_VECTOR)
4095 // Check for any non-constant elements.
4096 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
4097 switch (N->getOperand(i).getNode()->getOpcode()) {
4099 case ISD::ConstantFP:
4106 // Vectors of all-zeros and all-ones are materialized with special
4107 // instructions rather than being loaded.
4108 return !ISD::isBuildVectorAllZeros(N) &&
4109 !ISD::isBuildVectorAllOnes(N);
4112 /// ShouldXformToMOVLP{S|D} - Return true if the node should be transformed to
4113 /// match movlp{s|d}. The lower half elements should come from lower half of
4114 /// V1 (and in order), and the upper half elements should come from the upper
4115 /// half of V2 (and in order). And since V1 will become the source of the
4116 /// MOVLP, it must be either a vector load or a scalar load to vector.
4117 static bool ShouldXformToMOVLP(SDNode *V1, SDNode *V2,
4118 ShuffleVectorSDNode *Op) {
4119 EVT VT = Op->getValueType(0);
4120 if (VT.getSizeInBits() != 128)
4123 if (!ISD::isNON_EXTLoad(V1) && !isScalarLoadToVector(V1))
4125 // Is V2 is a vector load, don't do this transformation. We will try to use
4126 // load folding shufps op.
4127 if (ISD::isNON_EXTLoad(V2) || WillBeConstantPoolLoad(V2))
4130 unsigned NumElems = VT.getVectorNumElements();
4132 if (NumElems != 2 && NumElems != 4)
4134 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
4135 if (!isUndefOrEqual(Op->getMaskElt(i), i))
4137 for (unsigned i = NumElems/2; i != NumElems; ++i)
4138 if (!isUndefOrEqual(Op->getMaskElt(i), i+NumElems))
4143 /// isSplatVector - Returns true if N is a BUILD_VECTOR node whose elements are
4145 static bool isSplatVector(SDNode *N) {
4146 if (N->getOpcode() != ISD::BUILD_VECTOR)
4149 SDValue SplatValue = N->getOperand(0);
4150 for (unsigned i = 1, e = N->getNumOperands(); i != e; ++i)
4151 if (N->getOperand(i) != SplatValue)
4156 /// isZeroShuffle - Returns true if N is a VECTOR_SHUFFLE that can be resolved
4157 /// to an zero vector.
4158 /// FIXME: move to dag combiner / method on ShuffleVectorSDNode
4159 static bool isZeroShuffle(ShuffleVectorSDNode *N) {
4160 SDValue V1 = N->getOperand(0);
4161 SDValue V2 = N->getOperand(1);
4162 unsigned NumElems = N->getValueType(0).getVectorNumElements();
4163 for (unsigned i = 0; i != NumElems; ++i) {
4164 int Idx = N->getMaskElt(i);
4165 if (Idx >= (int)NumElems) {
4166 unsigned Opc = V2.getOpcode();
4167 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V2.getNode()))
4169 if (Opc != ISD::BUILD_VECTOR ||
4170 !X86::isZeroNode(V2.getOperand(Idx-NumElems)))
4172 } else if (Idx >= 0) {
4173 unsigned Opc = V1.getOpcode();
4174 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V1.getNode()))
4176 if (Opc != ISD::BUILD_VECTOR ||
4177 !X86::isZeroNode(V1.getOperand(Idx)))
4184 /// getZeroVector - Returns a vector of specified type with all zero elements.
4186 static SDValue getZeroVector(EVT VT, const X86Subtarget *Subtarget,
4187 SelectionDAG &DAG, DebugLoc dl) {
4188 assert(VT.isVector() && "Expected a vector type");
4190 // Always build SSE zero vectors as <4 x i32> bitcasted
4191 // to their dest type. This ensures they get CSE'd.
4193 if (VT.getSizeInBits() == 128) { // SSE
4194 if (Subtarget->hasSSE2()) { // SSE2
4195 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
4196 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
4198 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
4199 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4f32, Cst, Cst, Cst, Cst);
4201 } else if (VT.getSizeInBits() == 256) { // AVX
4202 if (Subtarget->hasAVX2()) { // AVX2
4203 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
4204 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
4205 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8i32, Ops, 8);
4207 // 256-bit logic and arithmetic instructions in AVX are all
4208 // floating-point, no support for integer ops. Emit fp zeroed vectors.
4209 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
4210 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
4211 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8f32, Ops, 8);
4214 return DAG.getNode(ISD::BITCAST, dl, VT, Vec);
4217 /// getOnesVector - Returns a vector of specified type with all bits set.
4218 /// Always build ones vectors as <4 x i32> or <8 x i32>. For 256-bit types with
4219 /// no AVX2 supprt, use two <4 x i32> inserted in a <8 x i32> appropriately.
4220 /// Then bitcast to their original type, ensuring they get CSE'd.
4221 static SDValue getOnesVector(EVT VT, bool HasAVX2, SelectionDAG &DAG,
4223 assert(VT.isVector() && "Expected a vector type");
4224 assert((VT.is128BitVector() || VT.is256BitVector())
4225 && "Expected a 128-bit or 256-bit vector type");
4227 SDValue Cst = DAG.getTargetConstant(~0U, MVT::i32);
4229 if (VT.getSizeInBits() == 256) {
4230 if (HasAVX2) { // AVX2
4231 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
4232 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8i32, Ops, 8);
4234 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
4235 SDValue InsV = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, MVT::v8i32),
4236 Vec, DAG.getConstant(0, MVT::i32), DAG, dl);
4237 Vec = Insert128BitVector(InsV, Vec,
4238 DAG.getConstant(4 /* NumElems/2 */, MVT::i32), DAG, dl);
4241 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
4244 return DAG.getNode(ISD::BITCAST, dl, VT, Vec);
4247 /// NormalizeMask - V2 is a splat, modify the mask (if needed) so all elements
4248 /// that point to V2 points to its first element.
4249 static SDValue NormalizeMask(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
4250 EVT VT = SVOp->getValueType(0);
4251 unsigned NumElems = VT.getVectorNumElements();
4253 bool Changed = false;
4254 SmallVector<int, 8> MaskVec(SVOp->getMask().begin(), SVOp->getMask().end());
4256 for (unsigned i = 0; i != NumElems; ++i) {
4257 if (MaskVec[i] > (int)NumElems) {
4258 MaskVec[i] = NumElems;
4263 return DAG.getVectorShuffle(VT, SVOp->getDebugLoc(), SVOp->getOperand(0),
4264 SVOp->getOperand(1), &MaskVec[0]);
4265 return SDValue(SVOp, 0);
4268 /// getMOVLMask - Returns a vector_shuffle mask for an movs{s|d}, movd
4269 /// operation of specified width.
4270 static SDValue getMOVL(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
4272 unsigned NumElems = VT.getVectorNumElements();
4273 SmallVector<int, 8> Mask;
4274 Mask.push_back(NumElems);
4275 for (unsigned i = 1; i != NumElems; ++i)
4277 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
4280 /// getUnpackl - Returns a vector_shuffle node for an unpackl operation.
4281 static SDValue getUnpackl(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
4283 unsigned NumElems = VT.getVectorNumElements();
4284 SmallVector<int, 8> Mask;
4285 for (unsigned i = 0, e = NumElems/2; i != e; ++i) {
4287 Mask.push_back(i + NumElems);
4289 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
4292 /// getUnpackh - Returns a vector_shuffle node for an unpackh operation.
4293 static SDValue getUnpackh(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
4295 unsigned NumElems = VT.getVectorNumElements();
4296 unsigned Half = NumElems/2;
4297 SmallVector<int, 8> Mask;
4298 for (unsigned i = 0; i != Half; ++i) {
4299 Mask.push_back(i + Half);
4300 Mask.push_back(i + NumElems + Half);
4302 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
4305 // PromoteSplati8i16 - All i16 and i8 vector types can't be used directly by
4306 // a generic shuffle instruction because the target has no such instructions.
4307 // Generate shuffles which repeat i16 and i8 several times until they can be
4308 // represented by v4f32 and then be manipulated by target suported shuffles.
4309 static SDValue PromoteSplati8i16(SDValue V, SelectionDAG &DAG, int &EltNo) {
4310 EVT VT = V.getValueType();
4311 int NumElems = VT.getVectorNumElements();
4312 DebugLoc dl = V.getDebugLoc();
4314 while (NumElems > 4) {
4315 if (EltNo < NumElems/2) {
4316 V = getUnpackl(DAG, dl, VT, V, V);
4318 V = getUnpackh(DAG, dl, VT, V, V);
4319 EltNo -= NumElems/2;
4326 /// getLegalSplat - Generate a legal splat with supported x86 shuffles
4327 static SDValue getLegalSplat(SelectionDAG &DAG, SDValue V, int EltNo) {
4328 EVT VT = V.getValueType();
4329 DebugLoc dl = V.getDebugLoc();
4330 assert((VT.getSizeInBits() == 128 || VT.getSizeInBits() == 256)
4331 && "Vector size not supported");
4333 if (VT.getSizeInBits() == 128) {
4334 V = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, V);
4335 int SplatMask[4] = { EltNo, EltNo, EltNo, EltNo };
4336 V = DAG.getVectorShuffle(MVT::v4f32, dl, V, DAG.getUNDEF(MVT::v4f32),
4339 // To use VPERMILPS to splat scalars, the second half of indicies must
4340 // refer to the higher part, which is a duplication of the lower one,
4341 // because VPERMILPS can only handle in-lane permutations.
4342 int SplatMask[8] = { EltNo, EltNo, EltNo, EltNo,
4343 EltNo+4, EltNo+4, EltNo+4, EltNo+4 };
4345 V = DAG.getNode(ISD::BITCAST, dl, MVT::v8f32, V);
4346 V = DAG.getVectorShuffle(MVT::v8f32, dl, V, DAG.getUNDEF(MVT::v8f32),
4350 return DAG.getNode(ISD::BITCAST, dl, VT, V);
4353 /// PromoteSplat - Splat is promoted to target supported vector shuffles.
4354 static SDValue PromoteSplat(ShuffleVectorSDNode *SV, SelectionDAG &DAG) {
4355 EVT SrcVT = SV->getValueType(0);
4356 SDValue V1 = SV->getOperand(0);
4357 DebugLoc dl = SV->getDebugLoc();
4359 int EltNo = SV->getSplatIndex();
4360 int NumElems = SrcVT.getVectorNumElements();
4361 unsigned Size = SrcVT.getSizeInBits();
4363 assert(((Size == 128 && NumElems > 4) || Size == 256) &&
4364 "Unknown how to promote splat for type");
4366 // Extract the 128-bit part containing the splat element and update
4367 // the splat element index when it refers to the higher register.
4369 unsigned Idx = (EltNo >= NumElems/2) ? NumElems/2 : 0;
4370 V1 = Extract128BitVector(V1, DAG.getConstant(Idx, MVT::i32), DAG, dl);
4372 EltNo -= NumElems/2;
4375 // All i16 and i8 vector types can't be used directly by a generic shuffle
4376 // instruction because the target has no such instruction. Generate shuffles
4377 // which repeat i16 and i8 several times until they fit in i32, and then can
4378 // be manipulated by target suported shuffles.
4379 EVT EltVT = SrcVT.getVectorElementType();
4380 if (EltVT == MVT::i8 || EltVT == MVT::i16)
4381 V1 = PromoteSplati8i16(V1, DAG, EltNo);
4383 // Recreate the 256-bit vector and place the same 128-bit vector
4384 // into the low and high part. This is necessary because we want
4385 // to use VPERM* to shuffle the vectors
4387 SDValue InsV = Insert128BitVector(DAG.getUNDEF(SrcVT), V1,
4388 DAG.getConstant(0, MVT::i32), DAG, dl);
4389 V1 = Insert128BitVector(InsV, V1,
4390 DAG.getConstant(NumElems/2, MVT::i32), DAG, dl);
4393 return getLegalSplat(DAG, V1, EltNo);
4396 /// getShuffleVectorZeroOrUndef - Return a vector_shuffle of the specified
4397 /// vector of zero or undef vector. This produces a shuffle where the low
4398 /// element of V2 is swizzled into the zero/undef vector, landing at element
4399 /// Idx. This produces a shuffle mask like 4,1,2,3 (idx=0) or 0,1,2,4 (idx=3).
4400 static SDValue getShuffleVectorZeroOrUndef(SDValue V2, unsigned Idx,
4402 const X86Subtarget *Subtarget,
4403 SelectionDAG &DAG) {
4404 EVT VT = V2.getValueType();
4406 ? getZeroVector(VT, Subtarget, DAG, V2.getDebugLoc()) : DAG.getUNDEF(VT);
4407 unsigned NumElems = VT.getVectorNumElements();
4408 SmallVector<int, 16> MaskVec;
4409 for (unsigned i = 0; i != NumElems; ++i)
4410 // If this is the insertion idx, put the low elt of V2 here.
4411 MaskVec.push_back(i == Idx ? NumElems : i);
4412 return DAG.getVectorShuffle(VT, V2.getDebugLoc(), V1, V2, &MaskVec[0]);
4415 /// getShuffleScalarElt - Returns the scalar element that will make up the ith
4416 /// element of the result of the vector shuffle.
4417 static SDValue getShuffleScalarElt(SDNode *N, int Index, SelectionDAG &DAG,
4420 return SDValue(); // Limit search depth.
4422 SDValue V = SDValue(N, 0);
4423 EVT VT = V.getValueType();
4424 unsigned Opcode = V.getOpcode();
4426 // Recurse into ISD::VECTOR_SHUFFLE node to find scalars.
4427 if (const ShuffleVectorSDNode *SV = dyn_cast<ShuffleVectorSDNode>(N)) {
4428 Index = SV->getMaskElt(Index);
4431 return DAG.getUNDEF(VT.getVectorElementType());
4433 int NumElems = VT.getVectorNumElements();
4434 SDValue NewV = (Index < NumElems) ? SV->getOperand(0) : SV->getOperand(1);
4435 return getShuffleScalarElt(NewV.getNode(), Index % NumElems, DAG, Depth+1);
4438 // Recurse into target specific vector shuffles to find scalars.
4439 if (isTargetShuffle(Opcode)) {
4440 int NumElems = VT.getVectorNumElements();
4441 SmallVector<unsigned, 16> ShuffleMask;
4446 ImmN = N->getOperand(N->getNumOperands()-1);
4447 DecodeSHUFPMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(),
4450 case X86ISD::UNPCKH:
4451 DecodeUNPCKHMask(VT, ShuffleMask);
4453 case X86ISD::UNPCKL:
4454 DecodeUNPCKLMask(VT, ShuffleMask);
4456 case X86ISD::MOVHLPS:
4457 DecodeMOVHLPSMask(NumElems, ShuffleMask);
4459 case X86ISD::MOVLHPS:
4460 DecodeMOVLHPSMask(NumElems, ShuffleMask);
4462 case X86ISD::PSHUFD:
4463 ImmN = N->getOperand(N->getNumOperands()-1);
4464 DecodePSHUFMask(NumElems,
4465 cast<ConstantSDNode>(ImmN)->getZExtValue(),
4468 case X86ISD::PSHUFHW:
4469 ImmN = N->getOperand(N->getNumOperands()-1);
4470 DecodePSHUFHWMask(cast<ConstantSDNode>(ImmN)->getZExtValue(),
4473 case X86ISD::PSHUFLW:
4474 ImmN = N->getOperand(N->getNumOperands()-1);
4475 DecodePSHUFLWMask(cast<ConstantSDNode>(ImmN)->getZExtValue(),
4479 case X86ISD::MOVSD: {
4480 // The index 0 always comes from the first element of the second source,
4481 // this is why MOVSS and MOVSD are used in the first place. The other
4482 // elements come from the other positions of the first source vector.
4483 unsigned OpNum = (Index == 0) ? 1 : 0;
4484 return getShuffleScalarElt(V.getOperand(OpNum).getNode(), Index, DAG,
4487 case X86ISD::VPERMILP:
4488 ImmN = N->getOperand(N->getNumOperands()-1);
4489 DecodeVPERMILPMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(),
4492 case X86ISD::VPERM2X128:
4493 ImmN = N->getOperand(N->getNumOperands()-1);
4494 DecodeVPERM2F128Mask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(),
4497 case X86ISD::MOVDDUP:
4498 case X86ISD::MOVLHPD:
4499 case X86ISD::MOVLPD:
4500 case X86ISD::MOVLPS:
4501 case X86ISD::MOVSHDUP:
4502 case X86ISD::MOVSLDUP:
4503 case X86ISD::PALIGN:
4504 return SDValue(); // Not yet implemented.
4505 default: llvm_unreachable("unknown target shuffle node");
4508 Index = ShuffleMask[Index];
4510 return DAG.getUNDEF(VT.getVectorElementType());
4512 SDValue NewV = (Index < NumElems) ? N->getOperand(0) : N->getOperand(1);
4513 return getShuffleScalarElt(NewV.getNode(), Index % NumElems, DAG,
4517 // Actual nodes that may contain scalar elements
4518 if (Opcode == ISD::BITCAST) {
4519 V = V.getOperand(0);
4520 EVT SrcVT = V.getValueType();
4521 unsigned NumElems = VT.getVectorNumElements();
4523 if (!SrcVT.isVector() || SrcVT.getVectorNumElements() != NumElems)
4527 if (V.getOpcode() == ISD::SCALAR_TO_VECTOR)
4528 return (Index == 0) ? V.getOperand(0)
4529 : DAG.getUNDEF(VT.getVectorElementType());
4531 if (V.getOpcode() == ISD::BUILD_VECTOR)
4532 return V.getOperand(Index);
4537 /// getNumOfConsecutiveZeros - Return the number of elements of a vector
4538 /// shuffle operation which come from a consecutively from a zero. The
4539 /// search can start in two different directions, from left or right.
4541 unsigned getNumOfConsecutiveZeros(SDNode *N, int NumElems,
4542 bool ZerosFromLeft, SelectionDAG &DAG) {
4545 while (i < NumElems) {
4546 unsigned Index = ZerosFromLeft ? i : NumElems-i-1;
4547 SDValue Elt = getShuffleScalarElt(N, Index, DAG, 0);
4548 if (!(Elt.getNode() &&
4549 (Elt.getOpcode() == ISD::UNDEF || X86::isZeroNode(Elt))))
4557 /// isShuffleMaskConsecutive - Check if the shuffle mask indicies from MaskI to
4558 /// MaskE correspond consecutively to elements from one of the vector operands,
4559 /// starting from its index OpIdx. Also tell OpNum which source vector operand.
4561 bool isShuffleMaskConsecutive(ShuffleVectorSDNode *SVOp, int MaskI, int MaskE,
4562 int OpIdx, int NumElems, unsigned &OpNum) {
4563 bool SeenV1 = false;
4564 bool SeenV2 = false;
4566 for (int i = MaskI; i <= MaskE; ++i, ++OpIdx) {
4567 int Idx = SVOp->getMaskElt(i);
4568 // Ignore undef indicies
4577 // Only accept consecutive elements from the same vector
4578 if ((Idx % NumElems != OpIdx) || (SeenV1 && SeenV2))
4582 OpNum = SeenV1 ? 0 : 1;
4586 /// isVectorShiftRight - Returns true if the shuffle can be implemented as a
4587 /// logical left shift of a vector.
4588 static bool isVectorShiftRight(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4589 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4590 unsigned NumElems = SVOp->getValueType(0).getVectorNumElements();
4591 unsigned NumZeros = getNumOfConsecutiveZeros(SVOp, NumElems,
4592 false /* check zeros from right */, DAG);
4598 // Considering the elements in the mask that are not consecutive zeros,
4599 // check if they consecutively come from only one of the source vectors.
4601 // V1 = {X, A, B, C} 0
4603 // vector_shuffle V1, V2 <1, 2, 3, X>
4605 if (!isShuffleMaskConsecutive(SVOp,
4606 0, // Mask Start Index
4607 NumElems-NumZeros-1, // Mask End Index
4608 NumZeros, // Where to start looking in the src vector
4609 NumElems, // Number of elements in vector
4610 OpSrc)) // Which source operand ?
4615 ShVal = SVOp->getOperand(OpSrc);
4619 /// isVectorShiftLeft - Returns true if the shuffle can be implemented as a
4620 /// logical left shift of a vector.
4621 static bool isVectorShiftLeft(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4622 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4623 unsigned NumElems = SVOp->getValueType(0).getVectorNumElements();
4624 unsigned NumZeros = getNumOfConsecutiveZeros(SVOp, NumElems,
4625 true /* check zeros from left */, DAG);
4631 // Considering the elements in the mask that are not consecutive zeros,
4632 // check if they consecutively come from only one of the source vectors.
4634 // 0 { A, B, X, X } = V2
4636 // vector_shuffle V1, V2 <X, X, 4, 5>
4638 if (!isShuffleMaskConsecutive(SVOp,
4639 NumZeros, // Mask Start Index
4640 NumElems-1, // Mask End Index
4641 0, // Where to start looking in the src vector
4642 NumElems, // Number of elements in vector
4643 OpSrc)) // Which source operand ?
4648 ShVal = SVOp->getOperand(OpSrc);
4652 /// isVectorShift - Returns true if the shuffle can be implemented as a
4653 /// logical left or right shift of a vector.
4654 static bool isVectorShift(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4655 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4656 // Although the logic below support any bitwidth size, there are no
4657 // shift instructions which handle more than 128-bit vectors.
4658 if (SVOp->getValueType(0).getSizeInBits() > 128)
4661 if (isVectorShiftLeft(SVOp, DAG, isLeft, ShVal, ShAmt) ||
4662 isVectorShiftRight(SVOp, DAG, isLeft, ShVal, ShAmt))
4668 /// LowerBuildVectorv16i8 - Custom lower build_vector of v16i8.
4670 static SDValue LowerBuildVectorv16i8(SDValue Op, unsigned NonZeros,
4671 unsigned NumNonZero, unsigned NumZero,
4673 const X86Subtarget* Subtarget,
4674 const TargetLowering &TLI) {
4678 DebugLoc dl = Op.getDebugLoc();
4681 for (unsigned i = 0; i < 16; ++i) {
4682 bool ThisIsNonZero = (NonZeros & (1 << i)) != 0;
4683 if (ThisIsNonZero && First) {
4685 V = getZeroVector(MVT::v8i16, Subtarget, DAG, dl);
4687 V = DAG.getUNDEF(MVT::v8i16);
4692 SDValue ThisElt(0, 0), LastElt(0, 0);
4693 bool LastIsNonZero = (NonZeros & (1 << (i-1))) != 0;
4694 if (LastIsNonZero) {
4695 LastElt = DAG.getNode(ISD::ZERO_EXTEND, dl,
4696 MVT::i16, Op.getOperand(i-1));
4698 if (ThisIsNonZero) {
4699 ThisElt = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i16, Op.getOperand(i));
4700 ThisElt = DAG.getNode(ISD::SHL, dl, MVT::i16,
4701 ThisElt, DAG.getConstant(8, MVT::i8));
4703 ThisElt = DAG.getNode(ISD::OR, dl, MVT::i16, ThisElt, LastElt);
4707 if (ThisElt.getNode())
4708 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, V, ThisElt,
4709 DAG.getIntPtrConstant(i/2));
4713 return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V);
4716 /// LowerBuildVectorv8i16 - Custom lower build_vector of v8i16.
4718 static SDValue LowerBuildVectorv8i16(SDValue Op, unsigned NonZeros,
4719 unsigned NumNonZero, unsigned NumZero,
4721 const X86Subtarget* Subtarget,
4722 const TargetLowering &TLI) {
4726 DebugLoc dl = Op.getDebugLoc();
4729 for (unsigned i = 0; i < 8; ++i) {
4730 bool isNonZero = (NonZeros & (1 << i)) != 0;
4734 V = getZeroVector(MVT::v8i16, Subtarget, DAG, dl);
4736 V = DAG.getUNDEF(MVT::v8i16);
4739 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl,
4740 MVT::v8i16, V, Op.getOperand(i),
4741 DAG.getIntPtrConstant(i));
4748 /// getVShift - Return a vector logical shift node.
4750 static SDValue getVShift(bool isLeft, EVT VT, SDValue SrcOp,
4751 unsigned NumBits, SelectionDAG &DAG,
4752 const TargetLowering &TLI, DebugLoc dl) {
4753 assert(VT.getSizeInBits() == 128 && "Unknown type for VShift");
4754 EVT ShVT = MVT::v2i64;
4755 unsigned Opc = isLeft ? X86ISD::VSHLDQ : X86ISD::VSRLDQ;
4756 SrcOp = DAG.getNode(ISD::BITCAST, dl, ShVT, SrcOp);
4757 return DAG.getNode(ISD::BITCAST, dl, VT,
4758 DAG.getNode(Opc, dl, ShVT, SrcOp,
4759 DAG.getConstant(NumBits,
4760 TLI.getShiftAmountTy(SrcOp.getValueType()))));
4764 X86TargetLowering::LowerAsSplatVectorLoad(SDValue SrcOp, EVT VT, DebugLoc dl,
4765 SelectionDAG &DAG) const {
4767 // Check if the scalar load can be widened into a vector load. And if
4768 // the address is "base + cst" see if the cst can be "absorbed" into
4769 // the shuffle mask.
4770 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(SrcOp)) {
4771 SDValue Ptr = LD->getBasePtr();
4772 if (!ISD::isNormalLoad(LD) || LD->isVolatile())
4774 EVT PVT = LD->getValueType(0);
4775 if (PVT != MVT::i32 && PVT != MVT::f32)
4780 if (FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr)) {
4781 FI = FINode->getIndex();
4783 } else if (DAG.isBaseWithConstantOffset(Ptr) &&
4784 isa<FrameIndexSDNode>(Ptr.getOperand(0))) {
4785 FI = cast<FrameIndexSDNode>(Ptr.getOperand(0))->getIndex();
4786 Offset = Ptr.getConstantOperandVal(1);
4787 Ptr = Ptr.getOperand(0);
4792 // FIXME: 256-bit vector instructions don't require a strict alignment,
4793 // improve this code to support it better.
4794 unsigned RequiredAlign = VT.getSizeInBits()/8;
4795 SDValue Chain = LD->getChain();
4796 // Make sure the stack object alignment is at least 16 or 32.
4797 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
4798 if (DAG.InferPtrAlignment(Ptr) < RequiredAlign) {
4799 if (MFI->isFixedObjectIndex(FI)) {
4800 // Can't change the alignment. FIXME: It's possible to compute
4801 // the exact stack offset and reference FI + adjust offset instead.
4802 // If someone *really* cares about this. That's the way to implement it.
4805 MFI->setObjectAlignment(FI, RequiredAlign);
4809 // (Offset % 16 or 32) must be multiple of 4. Then address is then
4810 // Ptr + (Offset & ~15).
4813 if ((Offset % RequiredAlign) & 3)
4815 int64_t StartOffset = Offset & ~(RequiredAlign-1);
4817 Ptr = DAG.getNode(ISD::ADD, Ptr.getDebugLoc(), Ptr.getValueType(),
4818 Ptr,DAG.getConstant(StartOffset, Ptr.getValueType()));
4820 int EltNo = (Offset - StartOffset) >> 2;
4821 int NumElems = VT.getVectorNumElements();
4823 EVT NVT = EVT::getVectorVT(*DAG.getContext(), PVT, NumElems);
4824 SDValue V1 = DAG.getLoad(NVT, dl, Chain, Ptr,
4825 LD->getPointerInfo().getWithOffset(StartOffset),
4826 false, false, false, 0);
4828 SmallVector<int, 8> Mask;
4829 for (int i = 0; i < NumElems; ++i)
4830 Mask.push_back(EltNo);
4832 return DAG.getVectorShuffle(NVT, dl, V1, DAG.getUNDEF(NVT), &Mask[0]);
4838 /// EltsFromConsecutiveLoads - Given the initializing elements 'Elts' of a
4839 /// vector of type 'VT', see if the elements can be replaced by a single large
4840 /// load which has the same value as a build_vector whose operands are 'elts'.
4842 /// Example: <load i32 *a, load i32 *a+4, undef, undef> -> zextload a
4844 /// FIXME: we'd also like to handle the case where the last elements are zero
4845 /// rather than undef via VZEXT_LOAD, but we do not detect that case today.
4846 /// There's even a handy isZeroNode for that purpose.
4847 static SDValue EltsFromConsecutiveLoads(EVT VT, SmallVectorImpl<SDValue> &Elts,
4848 DebugLoc &DL, SelectionDAG &DAG) {
4849 EVT EltVT = VT.getVectorElementType();
4850 unsigned NumElems = Elts.size();
4852 LoadSDNode *LDBase = NULL;
4853 unsigned LastLoadedElt = -1U;
4855 // For each element in the initializer, see if we've found a load or an undef.
4856 // If we don't find an initial load element, or later load elements are
4857 // non-consecutive, bail out.
4858 for (unsigned i = 0; i < NumElems; ++i) {
4859 SDValue Elt = Elts[i];
4861 if (!Elt.getNode() ||
4862 (Elt.getOpcode() != ISD::UNDEF && !ISD::isNON_EXTLoad(Elt.getNode())))
4865 if (Elt.getNode()->getOpcode() == ISD::UNDEF)
4867 LDBase = cast<LoadSDNode>(Elt.getNode());
4871 if (Elt.getOpcode() == ISD::UNDEF)
4874 LoadSDNode *LD = cast<LoadSDNode>(Elt);
4875 if (!DAG.isConsecutiveLoad(LD, LDBase, EltVT.getSizeInBits()/8, i))
4880 // If we have found an entire vector of loads and undefs, then return a large
4881 // load of the entire vector width starting at the base pointer. If we found
4882 // consecutive loads for the low half, generate a vzext_load node.
4883 if (LastLoadedElt == NumElems - 1) {
4884 if (DAG.InferPtrAlignment(LDBase->getBasePtr()) >= 16)
4885 return DAG.getLoad(VT, DL, LDBase->getChain(), LDBase->getBasePtr(),
4886 LDBase->getPointerInfo(),
4887 LDBase->isVolatile(), LDBase->isNonTemporal(),
4888 LDBase->isInvariant(), 0);
4889 return DAG.getLoad(VT, DL, LDBase->getChain(), LDBase->getBasePtr(),
4890 LDBase->getPointerInfo(),
4891 LDBase->isVolatile(), LDBase->isNonTemporal(),
4892 LDBase->isInvariant(), LDBase->getAlignment());
4893 } else if (NumElems == 4 && LastLoadedElt == 1 &&
4894 DAG.getTargetLoweringInfo().isTypeLegal(MVT::v2i64)) {
4895 SDVTList Tys = DAG.getVTList(MVT::v2i64, MVT::Other);
4896 SDValue Ops[] = { LDBase->getChain(), LDBase->getBasePtr() };
4898 DAG.getMemIntrinsicNode(X86ISD::VZEXT_LOAD, DL, Tys, Ops, 2, MVT::i64,
4899 LDBase->getPointerInfo(),
4900 LDBase->getAlignment(),
4901 false/*isVolatile*/, true/*ReadMem*/,
4903 return DAG.getNode(ISD::BITCAST, DL, VT, ResNode);
4908 /// isVectorBroadcast - Check if the node chain is suitable to be xformed to
4909 /// a vbroadcast node. We support two patterns:
4910 /// 1. A splat BUILD_VECTOR which uses a single scalar load.
4911 /// 2. A splat shuffle which uses a scalar_to_vector node which comes from
4913 /// The scalar load node is returned when a pattern is found,
4914 /// or SDValue() otherwise.
4915 static SDValue isVectorBroadcast(SDValue &Op, const X86Subtarget *Subtarget) {
4916 if (!Subtarget->hasAVX())
4919 EVT VT = Op.getValueType();
4922 if (V.hasOneUse() && V.getOpcode() == ISD::BITCAST)
4923 V = V.getOperand(0);
4925 //A suspected load to be broadcasted.
4928 switch (V.getOpcode()) {
4930 // Unknown pattern found.
4933 case ISD::BUILD_VECTOR: {
4934 // The BUILD_VECTOR node must be a splat.
4935 if (!isSplatVector(V.getNode()))
4938 Ld = V.getOperand(0);
4940 // The suspected load node has several users. Make sure that all
4941 // of its users are from the BUILD_VECTOR node.
4942 if (!Ld->hasNUsesOfValue(VT.getVectorNumElements(), 0))
4947 case ISD::VECTOR_SHUFFLE: {
4948 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
4950 // Shuffles must have a splat mask where the first element is
4952 if ((!SVOp->isSplat()) || SVOp->getMaskElt(0) != 0)
4955 SDValue Sc = Op.getOperand(0);
4956 if (Sc.getOpcode() != ISD::SCALAR_TO_VECTOR)
4959 Ld = Sc.getOperand(0);
4961 // The scalar_to_vector node and the suspected
4962 // load node must have exactly one user.
4963 if (!Sc.hasOneUse() || !Ld.hasOneUse())
4969 // The scalar source must be a normal load.
4970 if (!ISD::isNormalLoad(Ld.getNode()))
4973 // Reject loads that have uses of the chain result
4974 if (Ld->hasAnyUseOfValue(1))
4977 bool Is256 = VT.getSizeInBits() == 256;
4978 bool Is128 = VT.getSizeInBits() == 128;
4979 unsigned ScalarSize = Ld.getValueType().getSizeInBits();
4981 // VBroadcast to YMM
4982 if (Is256 && (ScalarSize == 32 || ScalarSize == 64))
4985 // VBroadcast to XMM
4986 if (Is128 && (ScalarSize == 32))
4989 // The integer check is needed for the 64-bit into 128-bit so it doesn't match
4990 // double since there is vbroadcastsd xmm
4991 if (Subtarget->hasAVX2() && Ld.getValueType().isInteger()) {
4992 // VBroadcast to YMM
4993 if (Is256 && (ScalarSize == 8 || ScalarSize == 16))
4996 // VBroadcast to XMM
4997 if (Is128 && (ScalarSize == 8 || ScalarSize == 16 || ScalarSize == 64))
5001 // Unsupported broadcast.
5006 X86TargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const {
5007 DebugLoc dl = Op.getDebugLoc();
5009 EVT VT = Op.getValueType();
5010 EVT ExtVT = VT.getVectorElementType();
5011 unsigned NumElems = Op.getNumOperands();
5013 // Vectors containing all zeros can be matched by pxor and xorps later
5014 if (ISD::isBuildVectorAllZeros(Op.getNode())) {
5015 // Canonicalize this to <4 x i32> to 1) ensure the zero vectors are CSE'd
5016 // and 2) ensure that i64 scalars are eliminated on x86-32 hosts.
5017 if (VT == MVT::v4i32 || VT == MVT::v8i32)
5020 return getZeroVector(VT, Subtarget, DAG, dl);
5023 // Vectors containing all ones can be matched by pcmpeqd on 128-bit width
5024 // vectors or broken into v4i32 operations on 256-bit vectors. AVX2 can use
5025 // vpcmpeqd on 256-bit vectors.
5026 if (ISD::isBuildVectorAllOnes(Op.getNode())) {
5027 if (VT == MVT::v4i32 || (VT == MVT::v8i32 && Subtarget->hasAVX2()))
5030 return getOnesVector(VT, Subtarget->hasAVX2(), DAG, dl);
5033 SDValue LD = isVectorBroadcast(Op, Subtarget);
5035 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, LD);
5037 unsigned EVTBits = ExtVT.getSizeInBits();
5039 unsigned NumZero = 0;
5040 unsigned NumNonZero = 0;
5041 unsigned NonZeros = 0;
5042 bool IsAllConstants = true;
5043 SmallSet<SDValue, 8> Values;
5044 for (unsigned i = 0; i < NumElems; ++i) {
5045 SDValue Elt = Op.getOperand(i);
5046 if (Elt.getOpcode() == ISD::UNDEF)
5049 if (Elt.getOpcode() != ISD::Constant &&
5050 Elt.getOpcode() != ISD::ConstantFP)
5051 IsAllConstants = false;
5052 if (X86::isZeroNode(Elt))
5055 NonZeros |= (1 << i);
5060 // All undef vector. Return an UNDEF. All zero vectors were handled above.
5061 if (NumNonZero == 0)
5062 return DAG.getUNDEF(VT);
5064 // Special case for single non-zero, non-undef, element.
5065 if (NumNonZero == 1) {
5066 unsigned Idx = CountTrailingZeros_32(NonZeros);
5067 SDValue Item = Op.getOperand(Idx);
5069 // If this is an insertion of an i64 value on x86-32, and if the top bits of
5070 // the value are obviously zero, truncate the value to i32 and do the
5071 // insertion that way. Only do this if the value is non-constant or if the
5072 // value is a constant being inserted into element 0. It is cheaper to do
5073 // a constant pool load than it is to do a movd + shuffle.
5074 if (ExtVT == MVT::i64 && !Subtarget->is64Bit() &&
5075 (!IsAllConstants || Idx == 0)) {
5076 if (DAG.MaskedValueIsZero(Item, APInt::getBitsSet(64, 32, 64))) {
5078 assert(VT == MVT::v2i64 && "Expected an SSE value type!");
5079 EVT VecVT = MVT::v4i32;
5080 unsigned VecElts = 4;
5082 // Truncate the value (which may itself be a constant) to i32, and
5083 // convert it to a vector with movd (S2V+shuffle to zero extend).
5084 Item = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, Item);
5085 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VecVT, Item);
5086 Item = getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
5088 // Now we have our 32-bit value zero extended in the low element of
5089 // a vector. If Idx != 0, swizzle it into place.
5091 SmallVector<int, 4> Mask;
5092 Mask.push_back(Idx);
5093 for (unsigned i = 1; i != VecElts; ++i)
5095 Item = DAG.getVectorShuffle(VecVT, dl, Item,
5096 DAG.getUNDEF(Item.getValueType()),
5099 return DAG.getNode(ISD::BITCAST, dl, VT, Item);
5103 // If we have a constant or non-constant insertion into the low element of
5104 // a vector, we can do this with SCALAR_TO_VECTOR + shuffle of zero into
5105 // the rest of the elements. This will be matched as movd/movq/movss/movsd
5106 // depending on what the source datatype is.
5109 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
5111 if (ExtVT == MVT::i32 || ExtVT == MVT::f32 || ExtVT == MVT::f64 ||
5112 (ExtVT == MVT::i64 && Subtarget->is64Bit())) {
5113 if (VT.getSizeInBits() == 256) {
5114 SDValue ZeroVec = getZeroVector(VT, Subtarget, DAG, dl);
5115 return DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, ZeroVec,
5116 Item, DAG.getIntPtrConstant(0));
5118 assert(VT.getSizeInBits() == 128 && "Expected an SSE value type!");
5119 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
5120 // Turn it into a MOVL (i.e. movss, movsd, or movd) to a zero vector.
5121 return getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
5124 if (ExtVT == MVT::i16 || ExtVT == MVT::i8) {
5125 Item = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, Item);
5126 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32, Item);
5127 if (VT.getSizeInBits() == 256) {
5128 SDValue ZeroVec = getZeroVector(MVT::v8i32, Subtarget, DAG, dl);
5129 Item = Insert128BitVector(ZeroVec, Item, DAG.getConstant(0, MVT::i32),
5132 assert(VT.getSizeInBits() == 128 && "Expected an SSE value type!");
5133 Item = getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
5135 return DAG.getNode(ISD::BITCAST, dl, VT, Item);
5139 // Is it a vector logical left shift?
5140 if (NumElems == 2 && Idx == 1 &&
5141 X86::isZeroNode(Op.getOperand(0)) &&
5142 !X86::isZeroNode(Op.getOperand(1))) {
5143 unsigned NumBits = VT.getSizeInBits();
5144 return getVShift(true, VT,
5145 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
5146 VT, Op.getOperand(1)),
5147 NumBits/2, DAG, *this, dl);
5150 if (IsAllConstants) // Otherwise, it's better to do a constpool load.
5153 // Otherwise, if this is a vector with i32 or f32 elements, and the element
5154 // is a non-constant being inserted into an element other than the low one,
5155 // we can't use a constant pool load. Instead, use SCALAR_TO_VECTOR (aka
5156 // movd/movss) to move this into the low element, then shuffle it into
5158 if (EVTBits == 32) {
5159 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
5161 // Turn it into a shuffle of zero and zero-extended scalar to vector.
5162 Item = getShuffleVectorZeroOrUndef(Item, 0, NumZero > 0, Subtarget, DAG);
5163 SmallVector<int, 8> MaskVec;
5164 for (unsigned i = 0; i < NumElems; i++)
5165 MaskVec.push_back(i == Idx ? 0 : 1);
5166 return DAG.getVectorShuffle(VT, dl, Item, DAG.getUNDEF(VT), &MaskVec[0]);
5170 // Splat is obviously ok. Let legalizer expand it to a shuffle.
5171 if (Values.size() == 1) {
5172 if (EVTBits == 32) {
5173 // Instead of a shuffle like this:
5174 // shuffle (scalar_to_vector (load (ptr + 4))), undef, <0, 0, 0, 0>
5175 // Check if it's possible to issue this instead.
5176 // shuffle (vload ptr)), undef, <1, 1, 1, 1>
5177 unsigned Idx = CountTrailingZeros_32(NonZeros);
5178 SDValue Item = Op.getOperand(Idx);
5179 if (Op.getNode()->isOnlyUserOf(Item.getNode()))
5180 return LowerAsSplatVectorLoad(Item, VT, dl, DAG);
5185 // A vector full of immediates; various special cases are already
5186 // handled, so this is best done with a single constant-pool load.
5190 // For AVX-length vectors, build the individual 128-bit pieces and use
5191 // shuffles to put them in place.
5192 if (VT.getSizeInBits() == 256) {
5193 SmallVector<SDValue, 32> V;
5194 for (unsigned i = 0; i != NumElems; ++i)
5195 V.push_back(Op.getOperand(i));
5197 EVT HVT = EVT::getVectorVT(*DAG.getContext(), ExtVT, NumElems/2);
5199 // Build both the lower and upper subvector.
5200 SDValue Lower = DAG.getNode(ISD::BUILD_VECTOR, dl, HVT, &V[0], NumElems/2);
5201 SDValue Upper = DAG.getNode(ISD::BUILD_VECTOR, dl, HVT, &V[NumElems / 2],
5204 // Recreate the wider vector with the lower and upper part.
5205 SDValue Vec = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, VT), Lower,
5206 DAG.getConstant(0, MVT::i32), DAG, dl);
5207 return Insert128BitVector(Vec, Upper, DAG.getConstant(NumElems/2, MVT::i32),
5211 // Let legalizer expand 2-wide build_vectors.
5212 if (EVTBits == 64) {
5213 if (NumNonZero == 1) {
5214 // One half is zero or undef.
5215 unsigned Idx = CountTrailingZeros_32(NonZeros);
5216 SDValue V2 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT,
5217 Op.getOperand(Idx));
5218 return getShuffleVectorZeroOrUndef(V2, Idx, true, Subtarget, DAG);
5223 // If element VT is < 32 bits, convert it to inserts into a zero vector.
5224 if (EVTBits == 8 && NumElems == 16) {
5225 SDValue V = LowerBuildVectorv16i8(Op, NonZeros,NumNonZero,NumZero, DAG,
5227 if (V.getNode()) return V;
5230 if (EVTBits == 16 && NumElems == 8) {
5231 SDValue V = LowerBuildVectorv8i16(Op, NonZeros,NumNonZero,NumZero, DAG,
5233 if (V.getNode()) return V;
5236 // If element VT is == 32 bits, turn it into a number of shuffles.
5237 SmallVector<SDValue, 8> V(NumElems);
5238 if (NumElems == 4 && NumZero > 0) {
5239 for (unsigned i = 0; i < 4; ++i) {
5240 bool isZero = !(NonZeros & (1 << i));
5242 V[i] = getZeroVector(VT, Subtarget, DAG, dl);
5244 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
5247 for (unsigned i = 0; i < 2; ++i) {
5248 switch ((NonZeros & (0x3 << i*2)) >> (i*2)) {
5251 V[i] = V[i*2]; // Must be a zero vector.
5254 V[i] = getMOVL(DAG, dl, VT, V[i*2+1], V[i*2]);
5257 V[i] = getMOVL(DAG, dl, VT, V[i*2], V[i*2+1]);
5260 V[i] = getUnpackl(DAG, dl, VT, V[i*2], V[i*2+1]);
5265 bool Reverse1 = (NonZeros & 0x3) == 2;
5266 bool Reverse2 = ((NonZeros & (0x3 << 2)) >> 2) == 2;
5270 static_cast<int>(Reverse2 ? NumElems+1 : NumElems),
5271 static_cast<int>(Reverse2 ? NumElems : NumElems+1)
5273 return DAG.getVectorShuffle(VT, dl, V[0], V[1], &MaskVec[0]);
5276 if (Values.size() > 1 && VT.getSizeInBits() == 128) {
5277 // Check for a build vector of consecutive loads.
5278 for (unsigned i = 0; i < NumElems; ++i)
5279 V[i] = Op.getOperand(i);
5281 // Check for elements which are consecutive loads.
5282 SDValue LD = EltsFromConsecutiveLoads(VT, V, dl, DAG);
5286 // For SSE 4.1, use insertps to put the high elements into the low element.
5287 if (getSubtarget()->hasSSE41()) {
5289 if (Op.getOperand(0).getOpcode() != ISD::UNDEF)
5290 Result = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(0));
5292 Result = DAG.getUNDEF(VT);
5294 for (unsigned i = 1; i < NumElems; ++i) {
5295 if (Op.getOperand(i).getOpcode() == ISD::UNDEF) continue;
5296 Result = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Result,
5297 Op.getOperand(i), DAG.getIntPtrConstant(i));
5302 // Otherwise, expand into a number of unpckl*, start by extending each of
5303 // our (non-undef) elements to the full vector width with the element in the
5304 // bottom slot of the vector (which generates no code for SSE).
5305 for (unsigned i = 0; i < NumElems; ++i) {
5306 if (Op.getOperand(i).getOpcode() != ISD::UNDEF)
5307 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
5309 V[i] = DAG.getUNDEF(VT);
5312 // Next, we iteratively mix elements, e.g. for v4f32:
5313 // Step 1: unpcklps 0, 2 ==> X: <?, ?, 2, 0>
5314 // : unpcklps 1, 3 ==> Y: <?, ?, 3, 1>
5315 // Step 2: unpcklps X, Y ==> <3, 2, 1, 0>
5316 unsigned EltStride = NumElems >> 1;
5317 while (EltStride != 0) {
5318 for (unsigned i = 0; i < EltStride; ++i) {
5319 // If V[i+EltStride] is undef and this is the first round of mixing,
5320 // then it is safe to just drop this shuffle: V[i] is already in the
5321 // right place, the one element (since it's the first round) being
5322 // inserted as undef can be dropped. This isn't safe for successive
5323 // rounds because they will permute elements within both vectors.
5324 if (V[i+EltStride].getOpcode() == ISD::UNDEF &&
5325 EltStride == NumElems/2)
5328 V[i] = getUnpackl(DAG, dl, VT, V[i], V[i + EltStride]);
5337 // LowerMMXCONCAT_VECTORS - We support concatenate two MMX registers and place
5338 // them in a MMX register. This is better than doing a stack convert.
5339 static SDValue LowerMMXCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
5340 DebugLoc dl = Op.getDebugLoc();
5341 EVT ResVT = Op.getValueType();
5343 assert(ResVT == MVT::v2i64 || ResVT == MVT::v4i32 ||
5344 ResVT == MVT::v8i16 || ResVT == MVT::v16i8);
5346 SDValue InVec = DAG.getNode(ISD::BITCAST,dl, MVT::v1i64, Op.getOperand(0));
5347 SDValue VecOp = DAG.getNode(X86ISD::MOVQ2DQ, dl, MVT::v2i64, InVec);
5348 InVec = Op.getOperand(1);
5349 if (InVec.getOpcode() == ISD::SCALAR_TO_VECTOR) {
5350 unsigned NumElts = ResVT.getVectorNumElements();
5351 VecOp = DAG.getNode(ISD::BITCAST, dl, ResVT, VecOp);
5352 VecOp = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, ResVT, VecOp,
5353 InVec.getOperand(0), DAG.getIntPtrConstant(NumElts/2+1));
5355 InVec = DAG.getNode(ISD::BITCAST, dl, MVT::v1i64, InVec);
5356 SDValue VecOp2 = DAG.getNode(X86ISD::MOVQ2DQ, dl, MVT::v2i64, InVec);
5357 Mask[0] = 0; Mask[1] = 2;
5358 VecOp = DAG.getVectorShuffle(MVT::v2i64, dl, VecOp, VecOp2, Mask);
5360 return DAG.getNode(ISD::BITCAST, dl, ResVT, VecOp);
5363 // LowerAVXCONCAT_VECTORS - 256-bit AVX can use the vinsertf128 instruction
5364 // to create 256-bit vectors from two other 128-bit ones.
5365 static SDValue LowerAVXCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
5366 DebugLoc dl = Op.getDebugLoc();
5367 EVT ResVT = Op.getValueType();
5369 assert(ResVT.getSizeInBits() == 256 && "Value type must be 256-bit wide");
5371 SDValue V1 = Op.getOperand(0);
5372 SDValue V2 = Op.getOperand(1);
5373 unsigned NumElems = ResVT.getVectorNumElements();
5375 SDValue V = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, ResVT), V1,
5376 DAG.getConstant(0, MVT::i32), DAG, dl);
5377 return Insert128BitVector(V, V2, DAG.getConstant(NumElems/2, MVT::i32),
5382 X86TargetLowering::LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const {
5383 EVT ResVT = Op.getValueType();
5385 assert(Op.getNumOperands() == 2);
5386 assert((ResVT.getSizeInBits() == 128 || ResVT.getSizeInBits() == 256) &&
5387 "Unsupported CONCAT_VECTORS for value type");
5389 // We support concatenate two MMX registers and place them in a MMX register.
5390 // This is better than doing a stack convert.
5391 if (ResVT.is128BitVector())
5392 return LowerMMXCONCAT_VECTORS(Op, DAG);
5394 // 256-bit AVX can use the vinsertf128 instruction to create 256-bit vectors
5395 // from two other 128-bit ones.
5396 return LowerAVXCONCAT_VECTORS(Op, DAG);
5399 // v8i16 shuffles - Prefer shuffles in the following order:
5400 // 1. [all] pshuflw, pshufhw, optional move
5401 // 2. [ssse3] 1 x pshufb
5402 // 3. [ssse3] 2 x pshufb + 1 x por
5403 // 4. [all] mov + pshuflw + pshufhw + N x (pextrw + pinsrw)
5405 X86TargetLowering::LowerVECTOR_SHUFFLEv8i16(SDValue Op,
5406 SelectionDAG &DAG) const {
5407 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
5408 SDValue V1 = SVOp->getOperand(0);
5409 SDValue V2 = SVOp->getOperand(1);
5410 DebugLoc dl = SVOp->getDebugLoc();
5411 SmallVector<int, 8> MaskVals;
5413 // Determine if more than 1 of the words in each of the low and high quadwords
5414 // of the result come from the same quadword of one of the two inputs. Undef
5415 // mask values count as coming from any quadword, for better codegen.
5416 unsigned LoQuad[] = { 0, 0, 0, 0 };
5417 unsigned HiQuad[] = { 0, 0, 0, 0 };
5418 BitVector InputQuads(4);
5419 for (unsigned i = 0; i < 8; ++i) {
5420 unsigned *Quad = i < 4 ? LoQuad : HiQuad;
5421 int EltIdx = SVOp->getMaskElt(i);
5422 MaskVals.push_back(EltIdx);
5431 InputQuads.set(EltIdx / 4);
5434 int BestLoQuad = -1;
5435 unsigned MaxQuad = 1;
5436 for (unsigned i = 0; i < 4; ++i) {
5437 if (LoQuad[i] > MaxQuad) {
5439 MaxQuad = LoQuad[i];
5443 int BestHiQuad = -1;
5445 for (unsigned i = 0; i < 4; ++i) {
5446 if (HiQuad[i] > MaxQuad) {
5448 MaxQuad = HiQuad[i];
5452 // For SSSE3, If all 8 words of the result come from only 1 quadword of each
5453 // of the two input vectors, shuffle them into one input vector so only a
5454 // single pshufb instruction is necessary. If There are more than 2 input
5455 // quads, disable the next transformation since it does not help SSSE3.
5456 bool V1Used = InputQuads[0] || InputQuads[1];
5457 bool V2Used = InputQuads[2] || InputQuads[3];
5458 if (Subtarget->hasSSSE3()) {
5459 if (InputQuads.count() == 2 && V1Used && V2Used) {
5460 BestLoQuad = InputQuads.find_first();
5461 BestHiQuad = InputQuads.find_next(BestLoQuad);
5463 if (InputQuads.count() > 2) {
5469 // If BestLoQuad or BestHiQuad are set, shuffle the quads together and update
5470 // the shuffle mask. If a quad is scored as -1, that means that it contains
5471 // words from all 4 input quadwords.
5473 if (BestLoQuad >= 0 || BestHiQuad >= 0) {
5475 BestLoQuad < 0 ? 0 : BestLoQuad,
5476 BestHiQuad < 0 ? 1 : BestHiQuad
5478 NewV = DAG.getVectorShuffle(MVT::v2i64, dl,
5479 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V1),
5480 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V2), &MaskV[0]);
5481 NewV = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, NewV);
5483 // Rewrite the MaskVals and assign NewV to V1 if NewV now contains all the
5484 // source words for the shuffle, to aid later transformations.
5485 bool AllWordsInNewV = true;
5486 bool InOrder[2] = { true, true };
5487 for (unsigned i = 0; i != 8; ++i) {
5488 int idx = MaskVals[i];
5490 InOrder[i/4] = false;
5491 if (idx < 0 || (idx/4) == BestLoQuad || (idx/4) == BestHiQuad)
5493 AllWordsInNewV = false;
5497 bool pshuflw = AllWordsInNewV, pshufhw = AllWordsInNewV;
5498 if (AllWordsInNewV) {
5499 for (int i = 0; i != 8; ++i) {
5500 int idx = MaskVals[i];
5503 idx = MaskVals[i] = (idx / 4) == BestLoQuad ? (idx & 3) : (idx & 3) + 4;
5504 if ((idx != i) && idx < 4)
5506 if ((idx != i) && idx > 3)
5515 // If we've eliminated the use of V2, and the new mask is a pshuflw or
5516 // pshufhw, that's as cheap as it gets. Return the new shuffle.
5517 if ((pshufhw && InOrder[0]) || (pshuflw && InOrder[1])) {
5518 unsigned Opc = pshufhw ? X86ISD::PSHUFHW : X86ISD::PSHUFLW;
5519 unsigned TargetMask = 0;
5520 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV,
5521 DAG.getUNDEF(MVT::v8i16), &MaskVals[0]);
5522 TargetMask = pshufhw ? X86::getShufflePSHUFHWImmediate(NewV.getNode()):
5523 X86::getShufflePSHUFLWImmediate(NewV.getNode());
5524 V1 = NewV.getOperand(0);
5525 return getTargetShuffleNode(Opc, dl, MVT::v8i16, V1, TargetMask, DAG);
5529 // If we have SSSE3, and all words of the result are from 1 input vector,
5530 // case 2 is generated, otherwise case 3 is generated. If no SSSE3
5531 // is present, fall back to case 4.
5532 if (Subtarget->hasSSSE3()) {
5533 SmallVector<SDValue,16> pshufbMask;
5535 // If we have elements from both input vectors, set the high bit of the
5536 // shuffle mask element to zero out elements that come from V2 in the V1
5537 // mask, and elements that come from V1 in the V2 mask, so that the two
5538 // results can be OR'd together.
5539 bool TwoInputs = V1Used && V2Used;
5540 for (unsigned i = 0; i != 8; ++i) {
5541 int EltIdx = MaskVals[i] * 2;
5542 if (TwoInputs && (EltIdx >= 16)) {
5543 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5544 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5547 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
5548 pshufbMask.push_back(DAG.getConstant(EltIdx+1, MVT::i8));
5550 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V1);
5551 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
5552 DAG.getNode(ISD::BUILD_VECTOR, dl,
5553 MVT::v16i8, &pshufbMask[0], 16));
5555 return DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
5557 // Calculate the shuffle mask for the second input, shuffle it, and
5558 // OR it with the first shuffled input.
5560 for (unsigned i = 0; i != 8; ++i) {
5561 int EltIdx = MaskVals[i] * 2;
5563 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5564 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5567 pshufbMask.push_back(DAG.getConstant(EltIdx - 16, MVT::i8));
5568 pshufbMask.push_back(DAG.getConstant(EltIdx - 15, MVT::i8));
5570 V2 = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V2);
5571 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
5572 DAG.getNode(ISD::BUILD_VECTOR, dl,
5573 MVT::v16i8, &pshufbMask[0], 16));
5574 V1 = DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
5575 return DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
5578 // If BestLoQuad >= 0, generate a pshuflw to put the low elements in order,
5579 // and update MaskVals with new element order.
5580 std::bitset<8> InOrder;
5581 if (BestLoQuad >= 0) {
5582 int MaskV[] = { -1, -1, -1, -1, 4, 5, 6, 7 };
5583 for (int i = 0; i != 4; ++i) {
5584 int idx = MaskVals[i];
5587 } else if ((idx / 4) == BestLoQuad) {
5592 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV, DAG.getUNDEF(MVT::v8i16),
5595 if (NewV.getOpcode() == ISD::VECTOR_SHUFFLE && Subtarget->hasSSSE3())
5596 NewV = getTargetShuffleNode(X86ISD::PSHUFLW, dl, MVT::v8i16,
5598 X86::getShufflePSHUFLWImmediate(NewV.getNode()),
5602 // If BestHi >= 0, generate a pshufhw to put the high elements in order,
5603 // and update MaskVals with the new element order.
5604 if (BestHiQuad >= 0) {
5605 int MaskV[] = { 0, 1, 2, 3, -1, -1, -1, -1 };
5606 for (unsigned i = 4; i != 8; ++i) {
5607 int idx = MaskVals[i];
5610 } else if ((idx / 4) == BestHiQuad) {
5611 MaskV[i] = (idx & 3) + 4;
5615 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV, DAG.getUNDEF(MVT::v8i16),
5618 if (NewV.getOpcode() == ISD::VECTOR_SHUFFLE && Subtarget->hasSSSE3())
5619 NewV = getTargetShuffleNode(X86ISD::PSHUFHW, dl, MVT::v8i16,
5621 X86::getShufflePSHUFHWImmediate(NewV.getNode()),
5625 // In case BestHi & BestLo were both -1, which means each quadword has a word
5626 // from each of the four input quadwords, calculate the InOrder bitvector now
5627 // before falling through to the insert/extract cleanup.
5628 if (BestLoQuad == -1 && BestHiQuad == -1) {
5630 for (int i = 0; i != 8; ++i)
5631 if (MaskVals[i] < 0 || MaskVals[i] == i)
5635 // The other elements are put in the right place using pextrw and pinsrw.
5636 for (unsigned i = 0; i != 8; ++i) {
5639 int EltIdx = MaskVals[i];
5642 SDValue ExtOp = (EltIdx < 8)
5643 ? DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V1,
5644 DAG.getIntPtrConstant(EltIdx))
5645 : DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V2,
5646 DAG.getIntPtrConstant(EltIdx - 8));
5647 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, ExtOp,
5648 DAG.getIntPtrConstant(i));
5653 // v16i8 shuffles - Prefer shuffles in the following order:
5654 // 1. [ssse3] 1 x pshufb
5655 // 2. [ssse3] 2 x pshufb + 1 x por
5656 // 3. [all] v8i16 shuffle + N x pextrw + rotate + pinsrw
5658 SDValue LowerVECTOR_SHUFFLEv16i8(ShuffleVectorSDNode *SVOp,
5660 const X86TargetLowering &TLI) {
5661 SDValue V1 = SVOp->getOperand(0);
5662 SDValue V2 = SVOp->getOperand(1);
5663 DebugLoc dl = SVOp->getDebugLoc();
5664 ArrayRef<int> MaskVals = SVOp->getMask();
5666 // If we have SSSE3, case 1 is generated when all result bytes come from
5667 // one of the inputs. Otherwise, case 2 is generated. If no SSSE3 is
5668 // present, fall back to case 3.
5669 // FIXME: kill V2Only once shuffles are canonizalized by getNode.
5672 for (unsigned i = 0; i < 16; ++i) {
5673 int EltIdx = MaskVals[i];
5682 // If SSSE3, use 1 pshufb instruction per vector with elements in the result.
5683 if (TLI.getSubtarget()->hasSSSE3()) {
5684 SmallVector<SDValue,16> pshufbMask;
5686 // If all result elements are from one input vector, then only translate
5687 // undef mask values to 0x80 (zero out result) in the pshufb mask.
5689 // Otherwise, we have elements from both input vectors, and must zero out
5690 // elements that come from V2 in the first mask, and V1 in the second mask
5691 // so that we can OR them together.
5692 bool TwoInputs = !(V1Only || V2Only);
5693 for (unsigned i = 0; i != 16; ++i) {
5694 int EltIdx = MaskVals[i];
5695 if (EltIdx < 0 || (TwoInputs && EltIdx >= 16)) {
5696 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5699 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
5701 // If all the elements are from V2, assign it to V1 and return after
5702 // building the first pshufb.
5705 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
5706 DAG.getNode(ISD::BUILD_VECTOR, dl,
5707 MVT::v16i8, &pshufbMask[0], 16));
5711 // Calculate the shuffle mask for the second input, shuffle it, and
5712 // OR it with the first shuffled input.
5714 for (unsigned i = 0; i != 16; ++i) {
5715 int EltIdx = MaskVals[i];
5717 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5720 pshufbMask.push_back(DAG.getConstant(EltIdx - 16, MVT::i8));
5722 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
5723 DAG.getNode(ISD::BUILD_VECTOR, dl,
5724 MVT::v16i8, &pshufbMask[0], 16));
5725 return DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
5728 // No SSSE3 - Calculate in place words and then fix all out of place words
5729 // With 0-16 extracts & inserts. Worst case is 16 bytes out of order from
5730 // the 16 different words that comprise the two doublequadword input vectors.
5731 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
5732 V2 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V2);
5733 SDValue NewV = V2Only ? V2 : V1;
5734 for (int i = 0; i != 8; ++i) {
5735 int Elt0 = MaskVals[i*2];
5736 int Elt1 = MaskVals[i*2+1];
5738 // This word of the result is all undef, skip it.
5739 if (Elt0 < 0 && Elt1 < 0)
5742 // This word of the result is already in the correct place, skip it.
5743 if (V1Only && (Elt0 == i*2) && (Elt1 == i*2+1))
5745 if (V2Only && (Elt0 == i*2+16) && (Elt1 == i*2+17))
5748 SDValue Elt0Src = Elt0 < 16 ? V1 : V2;
5749 SDValue Elt1Src = Elt1 < 16 ? V1 : V2;
5752 // If Elt0 and Elt1 are defined, are consecutive, and can be load
5753 // using a single extract together, load it and store it.
5754 if ((Elt0 >= 0) && ((Elt0 + 1) == Elt1) && ((Elt0 & 1) == 0)) {
5755 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
5756 DAG.getIntPtrConstant(Elt1 / 2));
5757 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
5758 DAG.getIntPtrConstant(i));
5762 // If Elt1 is defined, extract it from the appropriate source. If the
5763 // source byte is not also odd, shift the extracted word left 8 bits
5764 // otherwise clear the bottom 8 bits if we need to do an or.
5766 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
5767 DAG.getIntPtrConstant(Elt1 / 2));
5768 if ((Elt1 & 1) == 0)
5769 InsElt = DAG.getNode(ISD::SHL, dl, MVT::i16, InsElt,
5771 TLI.getShiftAmountTy(InsElt.getValueType())));
5773 InsElt = DAG.getNode(ISD::AND, dl, MVT::i16, InsElt,
5774 DAG.getConstant(0xFF00, MVT::i16));
5776 // If Elt0 is defined, extract it from the appropriate source. If the
5777 // source byte is not also even, shift the extracted word right 8 bits. If
5778 // Elt1 was also defined, OR the extracted values together before
5779 // inserting them in the result.
5781 SDValue InsElt0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16,
5782 Elt0Src, DAG.getIntPtrConstant(Elt0 / 2));
5783 if ((Elt0 & 1) != 0)
5784 InsElt0 = DAG.getNode(ISD::SRL, dl, MVT::i16, InsElt0,
5786 TLI.getShiftAmountTy(InsElt0.getValueType())));
5788 InsElt0 = DAG.getNode(ISD::AND, dl, MVT::i16, InsElt0,
5789 DAG.getConstant(0x00FF, MVT::i16));
5790 InsElt = Elt1 >= 0 ? DAG.getNode(ISD::OR, dl, MVT::i16, InsElt, InsElt0)
5793 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
5794 DAG.getIntPtrConstant(i));
5796 return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, NewV);
5799 /// RewriteAsNarrowerShuffle - Try rewriting v8i16 and v16i8 shuffles as 4 wide
5800 /// ones, or rewriting v4i32 / v4f32 as 2 wide ones if possible. This can be
5801 /// done when every pair / quad of shuffle mask elements point to elements in
5802 /// the right sequence. e.g.
5803 /// vector_shuffle X, Y, <2, 3, | 10, 11, | 0, 1, | 14, 15>
5805 SDValue RewriteAsNarrowerShuffle(ShuffleVectorSDNode *SVOp,
5806 SelectionDAG &DAG, DebugLoc dl) {
5807 EVT VT = SVOp->getValueType(0);
5808 SDValue V1 = SVOp->getOperand(0);
5809 SDValue V2 = SVOp->getOperand(1);
5810 unsigned NumElems = VT.getVectorNumElements();
5811 unsigned NewWidth = (NumElems == 4) ? 2 : 4;
5813 switch (VT.getSimpleVT().SimpleTy) {
5814 default: llvm_unreachable("Unexpected!");
5815 case MVT::v4f32: NewVT = MVT::v2f64; break;
5816 case MVT::v4i32: NewVT = MVT::v2i64; break;
5817 case MVT::v8i16: NewVT = MVT::v4i32; break;
5818 case MVT::v16i8: NewVT = MVT::v4i32; break;
5821 int Scale = NumElems / NewWidth;
5822 SmallVector<int, 8> MaskVec;
5823 for (unsigned i = 0; i < NumElems; i += Scale) {
5825 for (int j = 0; j < Scale; ++j) {
5826 int EltIdx = SVOp->getMaskElt(i+j);
5830 StartIdx = EltIdx - (EltIdx % Scale);
5831 if (EltIdx != StartIdx + j)
5835 MaskVec.push_back(-1);
5837 MaskVec.push_back(StartIdx / Scale);
5840 V1 = DAG.getNode(ISD::BITCAST, dl, NewVT, V1);
5841 V2 = DAG.getNode(ISD::BITCAST, dl, NewVT, V2);
5842 return DAG.getVectorShuffle(NewVT, dl, V1, V2, &MaskVec[0]);
5845 /// getVZextMovL - Return a zero-extending vector move low node.
5847 static SDValue getVZextMovL(EVT VT, EVT OpVT,
5848 SDValue SrcOp, SelectionDAG &DAG,
5849 const X86Subtarget *Subtarget, DebugLoc dl) {
5850 if (VT == MVT::v2f64 || VT == MVT::v4f32) {
5851 LoadSDNode *LD = NULL;
5852 if (!isScalarLoadToVector(SrcOp.getNode(), &LD))
5853 LD = dyn_cast<LoadSDNode>(SrcOp);
5855 // movssrr and movsdrr do not clear top bits. Try to use movd, movq
5857 MVT ExtVT = (OpVT == MVT::v2f64) ? MVT::i64 : MVT::i32;
5858 if ((ExtVT != MVT::i64 || Subtarget->is64Bit()) &&
5859 SrcOp.getOpcode() == ISD::SCALAR_TO_VECTOR &&
5860 SrcOp.getOperand(0).getOpcode() == ISD::BITCAST &&
5861 SrcOp.getOperand(0).getOperand(0).getValueType() == ExtVT) {
5863 OpVT = (OpVT == MVT::v2f64) ? MVT::v2i64 : MVT::v4i32;
5864 return DAG.getNode(ISD::BITCAST, dl, VT,
5865 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
5866 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
5874 return DAG.getNode(ISD::BITCAST, dl, VT,
5875 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
5876 DAG.getNode(ISD::BITCAST, dl,
5880 /// LowerVECTOR_SHUFFLE_256 - Handle all 256-bit wide vectors shuffles
5881 /// which could not be matched by any known target speficic shuffle
5883 LowerVECTOR_SHUFFLE_256(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
5884 EVT VT = SVOp->getValueType(0);
5886 unsigned NumElems = VT.getVectorNumElements();
5887 unsigned NumLaneElems = NumElems / 2;
5889 int MinRange[2][2] = { { static_cast<int>(NumElems),
5890 static_cast<int>(NumElems) },
5891 { static_cast<int>(NumElems),
5892 static_cast<int>(NumElems) } };
5893 int MaxRange[2][2] = { { -1, -1 }, { -1, -1 } };
5895 // Collect used ranges for each source in each lane
5896 for (unsigned l = 0; l < 2; ++l) {
5897 unsigned LaneStart = l*NumLaneElems;
5898 for (unsigned i = 0; i != NumLaneElems; ++i) {
5899 int Idx = SVOp->getMaskElt(i+LaneStart);
5904 if (Idx >= (int)NumElems) {
5909 if (Idx > MaxRange[l][Input])
5910 MaxRange[l][Input] = Idx;
5911 if (Idx < MinRange[l][Input])
5912 MinRange[l][Input] = Idx;
5916 // Make sure each range is 128-bits
5917 int ExtractIdx[2][2] = { { -1, -1 }, { -1, -1 } };
5918 for (unsigned l = 0; l < 2; ++l) {
5919 for (unsigned Input = 0; Input < 2; ++Input) {
5920 if (MinRange[l][Input] == (int)NumElems && MaxRange[l][Input] < 0)
5923 if (MinRange[l][Input] >= 0 && MaxRange[l][Input] < (int)NumLaneElems)
5924 ExtractIdx[l][Input] = 0;
5925 else if (MinRange[l][Input] >= (int)NumLaneElems &&
5926 MaxRange[l][Input] < (int)NumElems)
5927 ExtractIdx[l][Input] = NumLaneElems;
5933 DebugLoc dl = SVOp->getDebugLoc();
5934 MVT EltVT = VT.getVectorElementType().getSimpleVT();
5935 EVT NVT = MVT::getVectorVT(EltVT, NumElems/2);
5938 for (unsigned l = 0; l < 2; ++l) {
5939 for (unsigned Input = 0; Input < 2; ++Input) {
5940 if (ExtractIdx[l][Input] >= 0)
5941 Ops[l][Input] = Extract128BitVector(SVOp->getOperand(Input),
5942 DAG.getConstant(ExtractIdx[l][Input], MVT::i32),
5945 Ops[l][Input] = DAG.getUNDEF(NVT);
5949 // Generate 128-bit shuffles
5950 SmallVector<int, 16> Mask1, Mask2;
5951 for (unsigned i = 0; i != NumLaneElems; ++i) {
5952 int Elt = SVOp->getMaskElt(i);
5953 if (Elt >= (int)NumElems) {
5954 Elt %= NumLaneElems;
5955 Elt += NumLaneElems;
5956 } else if (Elt >= 0) {
5957 Elt %= NumLaneElems;
5959 Mask1.push_back(Elt);
5961 for (unsigned i = NumLaneElems; i != NumElems; ++i) {
5962 int Elt = SVOp->getMaskElt(i);
5963 if (Elt >= (int)NumElems) {
5964 Elt %= NumLaneElems;
5965 Elt += NumLaneElems;
5966 } else if (Elt >= 0) {
5967 Elt %= NumLaneElems;
5969 Mask2.push_back(Elt);
5972 SDValue Shuf1 = DAG.getVectorShuffle(NVT, dl, Ops[0][0], Ops[0][1], &Mask1[0]);
5973 SDValue Shuf2 = DAG.getVectorShuffle(NVT, dl, Ops[1][0], Ops[1][1], &Mask2[0]);
5975 // Concatenate the result back
5976 SDValue V = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, VT), Shuf1,
5977 DAG.getConstant(0, MVT::i32), DAG, dl);
5978 return Insert128BitVector(V, Shuf2, DAG.getConstant(NumElems/2, MVT::i32),
5982 /// LowerVECTOR_SHUFFLE_128v4 - Handle all 128-bit wide vectors with
5983 /// 4 elements, and match them with several different shuffle types.
5985 LowerVECTOR_SHUFFLE_128v4(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
5986 SDValue V1 = SVOp->getOperand(0);
5987 SDValue V2 = SVOp->getOperand(1);
5988 DebugLoc dl = SVOp->getDebugLoc();
5989 EVT VT = SVOp->getValueType(0);
5991 assert(VT.getSizeInBits() == 128 && "Unsupported vector size");
5993 std::pair<int, int> Locs[4];
5994 int Mask1[] = { -1, -1, -1, -1 };
5995 SmallVector<int, 8> PermMask(SVOp->getMask().begin(), SVOp->getMask().end());
5999 for (unsigned i = 0; i != 4; ++i) {
6000 int Idx = PermMask[i];
6002 Locs[i] = std::make_pair(-1, -1);
6004 assert(Idx < 8 && "Invalid VECTOR_SHUFFLE index!");
6006 Locs[i] = std::make_pair(0, NumLo);
6010 Locs[i] = std::make_pair(1, NumHi);
6012 Mask1[2+NumHi] = Idx;
6018 if (NumLo <= 2 && NumHi <= 2) {
6019 // If no more than two elements come from either vector. This can be
6020 // implemented with two shuffles. First shuffle gather the elements.
6021 // The second shuffle, which takes the first shuffle as both of its
6022 // vector operands, put the elements into the right order.
6023 V1 = DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
6025 int Mask2[] = { -1, -1, -1, -1 };
6027 for (unsigned i = 0; i != 4; ++i)
6028 if (Locs[i].first != -1) {
6029 unsigned Idx = (i < 2) ? 0 : 4;
6030 Idx += Locs[i].first * 2 + Locs[i].second;
6034 return DAG.getVectorShuffle(VT, dl, V1, V1, &Mask2[0]);
6035 } else if (NumLo == 3 || NumHi == 3) {
6036 // Otherwise, we must have three elements from one vector, call it X, and
6037 // one element from the other, call it Y. First, use a shufps to build an
6038 // intermediate vector with the one element from Y and the element from X
6039 // that will be in the same half in the final destination (the indexes don't
6040 // matter). Then, use a shufps to build the final vector, taking the half
6041 // containing the element from Y from the intermediate, and the other half
6044 // Normalize it so the 3 elements come from V1.
6045 CommuteVectorShuffleMask(PermMask, 4);
6049 // Find the element from V2.
6051 for (HiIndex = 0; HiIndex < 3; ++HiIndex) {
6052 int Val = PermMask[HiIndex];
6059 Mask1[0] = PermMask[HiIndex];
6061 Mask1[2] = PermMask[HiIndex^1];
6063 V2 = DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
6066 Mask1[0] = PermMask[0];
6067 Mask1[1] = PermMask[1];
6068 Mask1[2] = HiIndex & 1 ? 6 : 4;
6069 Mask1[3] = HiIndex & 1 ? 4 : 6;
6070 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
6072 Mask1[0] = HiIndex & 1 ? 2 : 0;
6073 Mask1[1] = HiIndex & 1 ? 0 : 2;
6074 Mask1[2] = PermMask[2];
6075 Mask1[3] = PermMask[3];
6080 return DAG.getVectorShuffle(VT, dl, V2, V1, &Mask1[0]);
6084 // Break it into (shuffle shuffle_hi, shuffle_lo).
6085 int LoMask[] = { -1, -1, -1, -1 };
6086 int HiMask[] = { -1, -1, -1, -1 };
6088 int *MaskPtr = LoMask;
6089 unsigned MaskIdx = 0;
6092 for (unsigned i = 0; i != 4; ++i) {
6099 int Idx = PermMask[i];
6101 Locs[i] = std::make_pair(-1, -1);
6102 } else if (Idx < 4) {
6103 Locs[i] = std::make_pair(MaskIdx, LoIdx);
6104 MaskPtr[LoIdx] = Idx;
6107 Locs[i] = std::make_pair(MaskIdx, HiIdx);
6108 MaskPtr[HiIdx] = Idx;
6113 SDValue LoShuffle = DAG.getVectorShuffle(VT, dl, V1, V2, &LoMask[0]);
6114 SDValue HiShuffle = DAG.getVectorShuffle(VT, dl, V1, V2, &HiMask[0]);
6115 int MaskOps[] = { -1, -1, -1, -1 };
6116 for (unsigned i = 0; i != 4; ++i)
6117 if (Locs[i].first != -1)
6118 MaskOps[i] = Locs[i].first * 4 + Locs[i].second;
6119 return DAG.getVectorShuffle(VT, dl, LoShuffle, HiShuffle, &MaskOps[0]);
6122 static bool MayFoldVectorLoad(SDValue V) {
6123 if (V.hasOneUse() && V.getOpcode() == ISD::BITCAST)
6124 V = V.getOperand(0);
6125 if (V.hasOneUse() && V.getOpcode() == ISD::SCALAR_TO_VECTOR)
6126 V = V.getOperand(0);
6127 if (V.hasOneUse() && V.getOpcode() == ISD::BUILD_VECTOR &&
6128 V.getNumOperands() == 2 && V.getOperand(1).getOpcode() == ISD::UNDEF)
6129 // BUILD_VECTOR (load), undef
6130 V = V.getOperand(0);
6136 // FIXME: the version above should always be used. Since there's
6137 // a bug where several vector shuffles can't be folded because the
6138 // DAG is not updated during lowering and a node claims to have two
6139 // uses while it only has one, use this version, and let isel match
6140 // another instruction if the load really happens to have more than
6141 // one use. Remove this version after this bug get fixed.
6142 // rdar://8434668, PR8156
6143 static bool RelaxedMayFoldVectorLoad(SDValue V) {
6144 if (V.hasOneUse() && V.getOpcode() == ISD::BITCAST)
6145 V = V.getOperand(0);
6146 if (V.hasOneUse() && V.getOpcode() == ISD::SCALAR_TO_VECTOR)
6147 V = V.getOperand(0);
6148 if (ISD::isNormalLoad(V.getNode()))
6153 /// CanFoldShuffleIntoVExtract - Check if the current shuffle is used by
6154 /// a vector extract, and if both can be later optimized into a single load.
6155 /// This is done in visitEXTRACT_VECTOR_ELT and the conditions are checked
6156 /// here because otherwise a target specific shuffle node is going to be
6157 /// emitted for this shuffle, and the optimization not done.
6158 /// FIXME: This is probably not the best approach, but fix the problem
6159 /// until the right path is decided.
6161 bool CanXFormVExtractWithShuffleIntoLoad(SDValue V, SelectionDAG &DAG,
6162 const TargetLowering &TLI) {
6163 EVT VT = V.getValueType();
6164 ShuffleVectorSDNode *SVOp = dyn_cast<ShuffleVectorSDNode>(V);
6166 // Be sure that the vector shuffle is present in a pattern like this:
6167 // (vextract (v4f32 shuffle (load $addr), <1,u,u,u>), c) -> (f32 load $addr)
6171 SDNode *N = *V.getNode()->use_begin();
6172 if (N->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
6175 SDValue EltNo = N->getOperand(1);
6176 if (!isa<ConstantSDNode>(EltNo))
6179 // If the bit convert changed the number of elements, it is unsafe
6180 // to examine the mask.
6181 bool HasShuffleIntoBitcast = false;
6182 if (V.getOpcode() == ISD::BITCAST) {
6183 EVT SrcVT = V.getOperand(0).getValueType();
6184 if (SrcVT.getVectorNumElements() != VT.getVectorNumElements())
6186 V = V.getOperand(0);
6187 HasShuffleIntoBitcast = true;
6190 // Select the input vector, guarding against out of range extract vector.
6191 unsigned NumElems = VT.getVectorNumElements();
6192 unsigned Elt = cast<ConstantSDNode>(EltNo)->getZExtValue();
6193 int Idx = (Elt > NumElems) ? -1 : SVOp->getMaskElt(Elt);
6194 V = (Idx < (int)NumElems) ? V.getOperand(0) : V.getOperand(1);
6196 // If we are accessing the upper part of a YMM register
6197 // then the EXTRACT_VECTOR_ELT is likely to be legalized to a sequence of
6198 // EXTRACT_SUBVECTOR + EXTRACT_VECTOR_ELT, which are not detected at this point
6199 // because the legalization of N did not happen yet.
6200 if (Idx >= (int)NumElems/2 && VT.getSizeInBits() == 256)
6203 // Skip one more bit_convert if necessary
6204 if (V.getOpcode() == ISD::BITCAST)
6205 V = V.getOperand(0);
6207 if (!ISD::isNormalLoad(V.getNode()))
6210 // Is the original load suitable?
6211 LoadSDNode *LN0 = cast<LoadSDNode>(V);
6213 if (!LN0 || !LN0->hasNUsesOfValue(1,0) || LN0->isVolatile())
6216 if (!HasShuffleIntoBitcast)
6219 // If there's a bitcast before the shuffle, check if the load type and
6220 // alignment is valid.
6221 unsigned Align = LN0->getAlignment();
6223 TLI.getTargetData()->getABITypeAlignment(
6224 VT.getTypeForEVT(*DAG.getContext()));
6226 if (NewAlign > Align || !TLI.isOperationLegalOrCustom(ISD::LOAD, VT))
6233 SDValue getMOVDDup(SDValue &Op, DebugLoc &dl, SDValue V1, SelectionDAG &DAG) {
6234 EVT VT = Op.getValueType();
6236 // Canonizalize to v2f64.
6237 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, V1);
6238 return DAG.getNode(ISD::BITCAST, dl, VT,
6239 getTargetShuffleNode(X86ISD::MOVDDUP, dl, MVT::v2f64,
6244 SDValue getMOVLowToHigh(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG,
6246 SDValue V1 = Op.getOperand(0);
6247 SDValue V2 = Op.getOperand(1);
6248 EVT VT = Op.getValueType();
6250 assert(VT != MVT::v2i64 && "unsupported shuffle type");
6252 if (HasSSE2 && VT == MVT::v2f64)
6253 return getTargetShuffleNode(X86ISD::MOVLHPD, dl, VT, V1, V2, DAG);
6255 // v4f32 or v4i32: canonizalized to v4f32 (which is legal for SSE1)
6256 return DAG.getNode(ISD::BITCAST, dl, VT,
6257 getTargetShuffleNode(X86ISD::MOVLHPS, dl, MVT::v4f32,
6258 DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, V1),
6259 DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, V2), DAG));
6263 SDValue getMOVHighToLow(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG) {
6264 SDValue V1 = Op.getOperand(0);
6265 SDValue V2 = Op.getOperand(1);
6266 EVT VT = Op.getValueType();
6268 assert((VT == MVT::v4i32 || VT == MVT::v4f32) &&
6269 "unsupported shuffle type");
6271 if (V2.getOpcode() == ISD::UNDEF)
6275 return getTargetShuffleNode(X86ISD::MOVHLPS, dl, VT, V1, V2, DAG);
6279 SDValue getMOVLP(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG, bool HasSSE2) {
6280 SDValue V1 = Op.getOperand(0);
6281 SDValue V2 = Op.getOperand(1);
6282 EVT VT = Op.getValueType();
6283 unsigned NumElems = VT.getVectorNumElements();
6285 // Use MOVLPS and MOVLPD in case V1 or V2 are loads. During isel, the second
6286 // operand of these instructions is only memory, so check if there's a
6287 // potencial load folding here, otherwise use SHUFPS or MOVSD to match the
6289 bool CanFoldLoad = false;
6291 // Trivial case, when V2 comes from a load.
6292 if (MayFoldVectorLoad(V2))
6295 // When V1 is a load, it can be folded later into a store in isel, example:
6296 // (store (v4f32 (X86Movlps (load addr:$src1), VR128:$src2)), addr:$src1)
6298 // (MOVLPSmr addr:$src1, VR128:$src2)
6299 // So, recognize this potential and also use MOVLPS or MOVLPD
6300 else if (MayFoldVectorLoad(V1) && MayFoldIntoStore(Op))
6303 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
6305 if (HasSSE2 && NumElems == 2)
6306 return getTargetShuffleNode(X86ISD::MOVLPD, dl, VT, V1, V2, DAG);
6309 // If we don't care about the second element, procede to use movss.
6310 if (SVOp->getMaskElt(1) != -1)
6311 return getTargetShuffleNode(X86ISD::MOVLPS, dl, VT, V1, V2, DAG);
6314 // movl and movlp will both match v2i64, but v2i64 is never matched by
6315 // movl earlier because we make it strict to avoid messing with the movlp load
6316 // folding logic (see the code above getMOVLP call). Match it here then,
6317 // this is horrible, but will stay like this until we move all shuffle
6318 // matching to x86 specific nodes. Note that for the 1st condition all
6319 // types are matched with movsd.
6321 // FIXME: isMOVLMask should be checked and matched before getMOVLP,
6322 // as to remove this logic from here, as much as possible
6323 if (NumElems == 2 || !X86::isMOVLMask(SVOp))
6324 return getTargetShuffleNode(X86ISD::MOVSD, dl, VT, V1, V2, DAG);
6325 return getTargetShuffleNode(X86ISD::MOVSS, dl, VT, V1, V2, DAG);
6328 assert(VT != MVT::v4i32 && "unsupported shuffle type");
6330 // Invert the operand order and use SHUFPS to match it.
6331 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V2, V1,
6332 X86::getShuffleSHUFImmediate(SVOp), DAG);
6336 SDValue NormalizeVectorShuffle(SDValue Op, SelectionDAG &DAG,
6337 const TargetLowering &TLI,
6338 const X86Subtarget *Subtarget) {
6339 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
6340 EVT VT = Op.getValueType();
6341 DebugLoc dl = Op.getDebugLoc();
6342 SDValue V1 = Op.getOperand(0);
6343 SDValue V2 = Op.getOperand(1);
6345 if (isZeroShuffle(SVOp))
6346 return getZeroVector(VT, Subtarget, DAG, dl);
6348 // Handle splat operations
6349 if (SVOp->isSplat()) {
6350 unsigned NumElem = VT.getVectorNumElements();
6351 int Size = VT.getSizeInBits();
6352 // Special case, this is the only place now where it's allowed to return
6353 // a vector_shuffle operation without using a target specific node, because
6354 // *hopefully* it will be optimized away by the dag combiner. FIXME: should
6355 // this be moved to DAGCombine instead?
6356 if (NumElem <= 4 && CanXFormVExtractWithShuffleIntoLoad(Op, DAG, TLI))
6359 // Use vbroadcast whenever the splat comes from a foldable load
6360 SDValue LD = isVectorBroadcast(Op, Subtarget);
6362 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, LD);
6364 // Handle splats by matching through known shuffle masks
6365 if ((Size == 128 && NumElem <= 4) ||
6366 (Size == 256 && NumElem < 8))
6369 // All remaning splats are promoted to target supported vector shuffles.
6370 return PromoteSplat(SVOp, DAG);
6373 // If the shuffle can be profitably rewritten as a narrower shuffle, then
6375 if (VT == MVT::v8i16 || VT == MVT::v16i8) {
6376 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG, dl);
6377 if (NewOp.getNode())
6378 return DAG.getNode(ISD::BITCAST, dl, VT, NewOp);
6379 } else if ((VT == MVT::v4i32 ||
6380 (VT == MVT::v4f32 && Subtarget->hasSSE2()))) {
6381 // FIXME: Figure out a cleaner way to do this.
6382 // Try to make use of movq to zero out the top part.
6383 if (ISD::isBuildVectorAllZeros(V2.getNode())) {
6384 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG, dl);
6385 if (NewOp.getNode()) {
6386 if (isCommutedMOVL(cast<ShuffleVectorSDNode>(NewOp), true, false))
6387 return getVZextMovL(VT, NewOp.getValueType(), NewOp.getOperand(0),
6388 DAG, Subtarget, dl);
6390 } else if (ISD::isBuildVectorAllZeros(V1.getNode())) {
6391 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG, dl);
6392 if (NewOp.getNode() && X86::isMOVLMask(cast<ShuffleVectorSDNode>(NewOp)))
6393 return getVZextMovL(VT, NewOp.getValueType(), NewOp.getOperand(1),
6394 DAG, Subtarget, dl);
6401 X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const {
6402 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
6403 SDValue V1 = Op.getOperand(0);
6404 SDValue V2 = Op.getOperand(1);
6405 EVT VT = Op.getValueType();
6406 DebugLoc dl = Op.getDebugLoc();
6407 unsigned NumElems = VT.getVectorNumElements();
6408 bool V1IsUndef = V1.getOpcode() == ISD::UNDEF;
6409 bool V2IsUndef = V2.getOpcode() == ISD::UNDEF;
6410 bool V1IsSplat = false;
6411 bool V2IsSplat = false;
6412 bool HasSSE2 = Subtarget->hasSSE2();
6413 bool HasAVX = Subtarget->hasAVX();
6414 bool HasAVX2 = Subtarget->hasAVX2();
6415 MachineFunction &MF = DAG.getMachineFunction();
6416 bool OptForSize = MF.getFunction()->hasFnAttr(Attribute::OptimizeForSize);
6418 assert(VT.getSizeInBits() != 64 && "Can't lower MMX shuffles");
6420 if (V1IsUndef && V2IsUndef)
6421 return DAG.getUNDEF(VT);
6423 assert(!V1IsUndef && "Op 1 of shuffle should not be undef");
6425 // Vector shuffle lowering takes 3 steps:
6427 // 1) Normalize the input vectors. Here splats, zeroed vectors, profitable
6428 // narrowing and commutation of operands should be handled.
6429 // 2) Matching of shuffles with known shuffle masks to x86 target specific
6431 // 3) Rewriting of unmatched masks into new generic shuffle operations,
6432 // so the shuffle can be broken into other shuffles and the legalizer can
6433 // try the lowering again.
6435 // The general idea is that no vector_shuffle operation should be left to
6436 // be matched during isel, all of them must be converted to a target specific
6439 // Normalize the input vectors. Here splats, zeroed vectors, profitable
6440 // narrowing and commutation of operands should be handled. The actual code
6441 // doesn't include all of those, work in progress...
6442 SDValue NewOp = NormalizeVectorShuffle(Op, DAG, *this, Subtarget);
6443 if (NewOp.getNode())
6446 // NOTE: isPSHUFDMask can also match both masks below (unpckl_undef and
6447 // unpckh_undef). Only use pshufd if speed is more important than size.
6448 if (OptForSize && X86::isUNPCKL_v_undef_Mask(SVOp, HasAVX2))
6449 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V1, DAG);
6450 if (OptForSize && X86::isUNPCKH_v_undef_Mask(SVOp, HasAVX2))
6451 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V1, DAG);
6453 if (X86::isMOVDDUPMask(SVOp) && Subtarget->hasSSE3() &&
6454 V2IsUndef && RelaxedMayFoldVectorLoad(V1))
6455 return getMOVDDup(Op, dl, V1, DAG);
6457 if (X86::isMOVHLPS_v_undef_Mask(SVOp))
6458 return getMOVHighToLow(Op, dl, DAG);
6460 // Use to match splats
6461 if (HasSSE2 && X86::isUNPCKHMask(SVOp, HasAVX2) && V2IsUndef &&
6462 (VT == MVT::v2f64 || VT == MVT::v2i64))
6463 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V1, DAG);
6465 if (X86::isPSHUFDMask(SVOp)) {
6466 // The actual implementation will match the mask in the if above and then
6467 // during isel it can match several different instructions, not only pshufd
6468 // as its name says, sad but true, emulate the behavior for now...
6469 if (X86::isMOVDDUPMask(SVOp) && ((VT == MVT::v4f32 || VT == MVT::v2i64)))
6470 return getTargetShuffleNode(X86ISD::MOVLHPS, dl, VT, V1, V1, DAG);
6472 unsigned TargetMask = X86::getShuffleSHUFImmediate(SVOp);
6474 if (HasSSE2 && (VT == MVT::v4f32 || VT == MVT::v4i32))
6475 return getTargetShuffleNode(X86ISD::PSHUFD, dl, VT, V1, TargetMask, DAG);
6477 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V1, V1,
6481 // Check if this can be converted into a logical shift.
6482 bool isLeft = false;
6485 bool isShift = HasSSE2 && isVectorShift(SVOp, DAG, isLeft, ShVal, ShAmt);
6486 if (isShift && ShVal.hasOneUse()) {
6487 // If the shifted value has multiple uses, it may be cheaper to use
6488 // v_set0 + movlhps or movhlps, etc.
6489 EVT EltVT = VT.getVectorElementType();
6490 ShAmt *= EltVT.getSizeInBits();
6491 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
6494 if (X86::isMOVLMask(SVOp)) {
6495 if (ISD::isBuildVectorAllZeros(V1.getNode()))
6496 return getVZextMovL(VT, VT, V2, DAG, Subtarget, dl);
6497 if (!X86::isMOVLPMask(SVOp)) {
6498 if (HasSSE2 && (VT == MVT::v2i64 || VT == MVT::v2f64))
6499 return getTargetShuffleNode(X86ISD::MOVSD, dl, VT, V1, V2, DAG);
6501 if (VT == MVT::v4i32 || VT == MVT::v4f32)
6502 return getTargetShuffleNode(X86ISD::MOVSS, dl, VT, V1, V2, DAG);
6506 // FIXME: fold these into legal mask.
6507 if (X86::isMOVLHPSMask(SVOp) && !X86::isUNPCKLMask(SVOp, HasAVX2))
6508 return getMOVLowToHigh(Op, dl, DAG, HasSSE2);
6510 if (X86::isMOVHLPSMask(SVOp))
6511 return getMOVHighToLow(Op, dl, DAG);
6513 if (X86::isMOVSHDUPMask(SVOp, Subtarget))
6514 return getTargetShuffleNode(X86ISD::MOVSHDUP, dl, VT, V1, DAG);
6516 if (X86::isMOVSLDUPMask(SVOp, Subtarget))
6517 return getTargetShuffleNode(X86ISD::MOVSLDUP, dl, VT, V1, DAG);
6519 if (X86::isMOVLPMask(SVOp))
6520 return getMOVLP(Op, dl, DAG, HasSSE2);
6522 if (ShouldXformToMOVHLPS(SVOp) ||
6523 ShouldXformToMOVLP(V1.getNode(), V2.getNode(), SVOp))
6524 return CommuteVectorShuffle(SVOp, DAG);
6527 // No better options. Use a vshldq / vsrldq.
6528 EVT EltVT = VT.getVectorElementType();
6529 ShAmt *= EltVT.getSizeInBits();
6530 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
6533 bool Commuted = false;
6534 // FIXME: This should also accept a bitcast of a splat? Be careful, not
6535 // 1,1,1,1 -> v8i16 though.
6536 V1IsSplat = isSplatVector(V1.getNode());
6537 V2IsSplat = isSplatVector(V2.getNode());
6539 // Canonicalize the splat or undef, if present, to be on the RHS.
6540 if (V1IsSplat && !V2IsSplat) {
6541 Op = CommuteVectorShuffle(SVOp, DAG);
6542 SVOp = cast<ShuffleVectorSDNode>(Op);
6543 V1 = SVOp->getOperand(0);
6544 V2 = SVOp->getOperand(1);
6545 std::swap(V1IsSplat, V2IsSplat);
6549 ArrayRef<int> M = SVOp->getMask();
6551 if (isCommutedMOVLMask(M, VT, V2IsSplat, V2IsUndef)) {
6552 // Shuffling low element of v1 into undef, just return v1.
6555 // If V2 is a splat, the mask may be malformed such as <4,3,3,3>, which
6556 // the instruction selector will not match, so get a canonical MOVL with
6557 // swapped operands to undo the commute.
6558 return getMOVL(DAG, dl, VT, V2, V1);
6561 if (isUNPCKLMask(M, VT, HasAVX2))
6562 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V2, DAG);
6564 if (isUNPCKHMask(M, VT, HasAVX2))
6565 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V2, DAG);
6568 // Normalize mask so all entries that point to V2 points to its first
6569 // element then try to match unpck{h|l} again. If match, return a
6570 // new vector_shuffle with the corrected mask.
6571 SDValue NewMask = NormalizeMask(SVOp, DAG);
6572 ShuffleVectorSDNode *NSVOp = cast<ShuffleVectorSDNode>(NewMask);
6573 if (NSVOp != SVOp) {
6574 if (X86::isUNPCKLMask(NSVOp, HasAVX2, true)) {
6576 } else if (X86::isUNPCKHMask(NSVOp, HasAVX2, true)) {
6583 // Commute is back and try unpck* again.
6584 // FIXME: this seems wrong.
6585 SDValue NewOp = CommuteVectorShuffle(SVOp, DAG);
6586 ShuffleVectorSDNode *NewSVOp = cast<ShuffleVectorSDNode>(NewOp);
6588 if (X86::isUNPCKLMask(NewSVOp, HasAVX2))
6589 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V2, V1, DAG);
6591 if (X86::isUNPCKHMask(NewSVOp, HasAVX2))
6592 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V2, V1, DAG);
6595 // Normalize the node to match x86 shuffle ops if needed
6596 if (!V2IsUndef && (isSHUFPMask(M, VT, HasAVX, /* Commuted */ true)))
6597 return CommuteVectorShuffle(SVOp, DAG);
6599 // The checks below are all present in isShuffleMaskLegal, but they are
6600 // inlined here right now to enable us to directly emit target specific
6601 // nodes, and remove one by one until they don't return Op anymore.
6603 if (isPALIGNRMask(M, VT, Subtarget))
6604 return getTargetShuffleNode(X86ISD::PALIGN, dl, VT, V1, V2,
6605 getShufflePALIGNRImmediate(SVOp),
6608 if (ShuffleVectorSDNode::isSplatMask(&M[0], VT) &&
6609 SVOp->getSplatIndex() == 0 && V2IsUndef) {
6610 if (VT == MVT::v2f64 || VT == MVT::v2i64)
6611 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V1, DAG);
6614 if (isPSHUFHWMask(M, VT))
6615 return getTargetShuffleNode(X86ISD::PSHUFHW, dl, VT, V1,
6616 X86::getShufflePSHUFHWImmediate(SVOp),
6619 if (isPSHUFLWMask(M, VT))
6620 return getTargetShuffleNode(X86ISD::PSHUFLW, dl, VT, V1,
6621 X86::getShufflePSHUFLWImmediate(SVOp),
6624 if (isSHUFPMask(M, VT, HasAVX))
6625 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V1, V2,
6626 X86::getShuffleSHUFImmediate(SVOp), DAG);
6628 if (isUNPCKL_v_undef_Mask(M, VT, HasAVX2))
6629 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V1, DAG);
6630 if (isUNPCKH_v_undef_Mask(M, VT, HasAVX2))
6631 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V1, DAG);
6633 //===--------------------------------------------------------------------===//
6634 // Generate target specific nodes for 128 or 256-bit shuffles only
6635 // supported in the AVX instruction set.
6638 // Handle VMOVDDUPY permutations
6639 if (V2IsUndef && isMOVDDUPYMask(M, VT, HasAVX))
6640 return getTargetShuffleNode(X86ISD::MOVDDUP, dl, VT, V1, DAG);
6642 // Handle VPERMILPS/D* permutations
6643 if (isVPERMILPMask(M, VT, HasAVX))
6644 return getTargetShuffleNode(X86ISD::VPERMILP, dl, VT, V1,
6645 X86::getShuffleSHUFImmediate(SVOp), DAG);
6647 // Handle VPERM2F128/VPERM2I128 permutations
6648 if (isVPERM2X128Mask(M, VT, HasAVX))
6649 return getTargetShuffleNode(X86ISD::VPERM2X128, dl, VT, V1,
6650 V2, getShuffleVPERM2X128Immediate(SVOp), DAG);
6652 //===--------------------------------------------------------------------===//
6653 // Since no target specific shuffle was selected for this generic one,
6654 // lower it into other known shuffles. FIXME: this isn't true yet, but
6655 // this is the plan.
6658 // Handle v8i16 specifically since SSE can do byte extraction and insertion.
6659 if (VT == MVT::v8i16) {
6660 SDValue NewOp = LowerVECTOR_SHUFFLEv8i16(Op, DAG);
6661 if (NewOp.getNode())
6665 if (VT == MVT::v16i8) {
6666 SDValue NewOp = LowerVECTOR_SHUFFLEv16i8(SVOp, DAG, *this);
6667 if (NewOp.getNode())
6671 // Handle all 128-bit wide vectors with 4 elements, and match them with
6672 // several different shuffle types.
6673 if (NumElems == 4 && VT.getSizeInBits() == 128)
6674 return LowerVECTOR_SHUFFLE_128v4(SVOp, DAG);
6676 // Handle general 256-bit shuffles
6677 if (VT.is256BitVector())
6678 return LowerVECTOR_SHUFFLE_256(SVOp, DAG);
6684 X86TargetLowering::LowerEXTRACT_VECTOR_ELT_SSE4(SDValue Op,
6685 SelectionDAG &DAG) const {
6686 EVT VT = Op.getValueType();
6687 DebugLoc dl = Op.getDebugLoc();
6689 if (Op.getOperand(0).getValueType().getSizeInBits() != 128)
6692 if (VT.getSizeInBits() == 8) {
6693 SDValue Extract = DAG.getNode(X86ISD::PEXTRB, dl, MVT::i32,
6694 Op.getOperand(0), Op.getOperand(1));
6695 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
6696 DAG.getValueType(VT));
6697 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
6698 } else if (VT.getSizeInBits() == 16) {
6699 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6700 // If Idx is 0, it's cheaper to do a move instead of a pextrw.
6702 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
6703 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
6704 DAG.getNode(ISD::BITCAST, dl,
6708 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, MVT::i32,
6709 Op.getOperand(0), Op.getOperand(1));
6710 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
6711 DAG.getValueType(VT));
6712 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
6713 } else if (VT == MVT::f32) {
6714 // EXTRACTPS outputs to a GPR32 register which will require a movd to copy
6715 // the result back to FR32 register. It's only worth matching if the
6716 // result has a single use which is a store or a bitcast to i32. And in
6717 // the case of a store, it's not worth it if the index is a constant 0,
6718 // because a MOVSSmr can be used instead, which is smaller and faster.
6719 if (!Op.hasOneUse())
6721 SDNode *User = *Op.getNode()->use_begin();
6722 if ((User->getOpcode() != ISD::STORE ||
6723 (isa<ConstantSDNode>(Op.getOperand(1)) &&
6724 cast<ConstantSDNode>(Op.getOperand(1))->isNullValue())) &&
6725 (User->getOpcode() != ISD::BITCAST ||
6726 User->getValueType(0) != MVT::i32))
6728 SDValue Extract = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
6729 DAG.getNode(ISD::BITCAST, dl, MVT::v4i32,
6732 return DAG.getNode(ISD::BITCAST, dl, MVT::f32, Extract);
6733 } else if (VT == MVT::i32 || VT == MVT::i64) {
6734 // ExtractPS/pextrq works with constant index.
6735 if (isa<ConstantSDNode>(Op.getOperand(1)))
6743 X86TargetLowering::LowerEXTRACT_VECTOR_ELT(SDValue Op,
6744 SelectionDAG &DAG) const {
6745 if (!isa<ConstantSDNode>(Op.getOperand(1)))
6748 SDValue Vec = Op.getOperand(0);
6749 EVT VecVT = Vec.getValueType();
6751 // If this is a 256-bit vector result, first extract the 128-bit vector and
6752 // then extract the element from the 128-bit vector.
6753 if (VecVT.getSizeInBits() == 256) {
6754 DebugLoc dl = Op.getNode()->getDebugLoc();
6755 unsigned NumElems = VecVT.getVectorNumElements();
6756 SDValue Idx = Op.getOperand(1);
6757 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
6759 // Get the 128-bit vector.
6760 bool Upper = IdxVal >= NumElems/2;
6761 Vec = Extract128BitVector(Vec,
6762 DAG.getConstant(Upper ? NumElems/2 : 0, MVT::i32), DAG, dl);
6764 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, Op.getValueType(), Vec,
6765 Upper ? DAG.getConstant(IdxVal-NumElems/2, MVT::i32) : Idx);
6768 assert(Vec.getValueSizeInBits() <= 128 && "Unexpected vector length");
6770 if (Subtarget->hasSSE41()) {
6771 SDValue Res = LowerEXTRACT_VECTOR_ELT_SSE4(Op, DAG);
6776 EVT VT = Op.getValueType();
6777 DebugLoc dl = Op.getDebugLoc();
6778 // TODO: handle v16i8.
6779 if (VT.getSizeInBits() == 16) {
6780 SDValue Vec = Op.getOperand(0);
6781 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6783 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
6784 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
6785 DAG.getNode(ISD::BITCAST, dl,
6788 // Transform it so it match pextrw which produces a 32-bit result.
6789 EVT EltVT = MVT::i32;
6790 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, EltVT,
6791 Op.getOperand(0), Op.getOperand(1));
6792 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, EltVT, Extract,
6793 DAG.getValueType(VT));
6794 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
6795 } else if (VT.getSizeInBits() == 32) {
6796 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6800 // SHUFPS the element to the lowest double word, then movss.
6801 int Mask[4] = { static_cast<int>(Idx), -1, -1, -1 };
6802 EVT VVT = Op.getOperand(0).getValueType();
6803 SDValue Vec = DAG.getVectorShuffle(VVT, dl, Op.getOperand(0),
6804 DAG.getUNDEF(VVT), Mask);
6805 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
6806 DAG.getIntPtrConstant(0));
6807 } else if (VT.getSizeInBits() == 64) {
6808 // FIXME: .td only matches this for <2 x f64>, not <2 x i64> on 32b
6809 // FIXME: seems like this should be unnecessary if mov{h,l}pd were taught
6810 // to match extract_elt for f64.
6811 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6815 // UNPCKHPD the element to the lowest double word, then movsd.
6816 // Note if the lower 64 bits of the result of the UNPCKHPD is then stored
6817 // to a f64mem, the whole operation is folded into a single MOVHPDmr.
6818 int Mask[2] = { 1, -1 };
6819 EVT VVT = Op.getOperand(0).getValueType();
6820 SDValue Vec = DAG.getVectorShuffle(VVT, dl, Op.getOperand(0),
6821 DAG.getUNDEF(VVT), Mask);
6822 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
6823 DAG.getIntPtrConstant(0));
6830 X86TargetLowering::LowerINSERT_VECTOR_ELT_SSE4(SDValue Op,
6831 SelectionDAG &DAG) const {
6832 EVT VT = Op.getValueType();
6833 EVT EltVT = VT.getVectorElementType();
6834 DebugLoc dl = Op.getDebugLoc();
6836 SDValue N0 = Op.getOperand(0);
6837 SDValue N1 = Op.getOperand(1);
6838 SDValue N2 = Op.getOperand(2);
6840 if (VT.getSizeInBits() == 256)
6843 if ((EltVT.getSizeInBits() == 8 || EltVT.getSizeInBits() == 16) &&
6844 isa<ConstantSDNode>(N2)) {
6846 if (VT == MVT::v8i16)
6847 Opc = X86ISD::PINSRW;
6848 else if (VT == MVT::v16i8)
6849 Opc = X86ISD::PINSRB;
6851 Opc = X86ISD::PINSRB;
6853 // Transform it so it match pinsr{b,w} which expects a GR32 as its second
6855 if (N1.getValueType() != MVT::i32)
6856 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
6857 if (N2.getValueType() != MVT::i32)
6858 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
6859 return DAG.getNode(Opc, dl, VT, N0, N1, N2);
6860 } else if (EltVT == MVT::f32 && isa<ConstantSDNode>(N2)) {
6861 // Bits [7:6] of the constant are the source select. This will always be
6862 // zero here. The DAG Combiner may combine an extract_elt index into these
6863 // bits. For example (insert (extract, 3), 2) could be matched by putting
6864 // the '3' into bits [7:6] of X86ISD::INSERTPS.
6865 // Bits [5:4] of the constant are the destination select. This is the
6866 // value of the incoming immediate.
6867 // Bits [3:0] of the constant are the zero mask. The DAG Combiner may
6868 // combine either bitwise AND or insert of float 0.0 to set these bits.
6869 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue() << 4);
6870 // Create this as a scalar to vector..
6871 N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4f32, N1);
6872 return DAG.getNode(X86ISD::INSERTPS, dl, VT, N0, N1, N2);
6873 } else if ((EltVT == MVT::i32 || EltVT == MVT::i64) &&
6874 isa<ConstantSDNode>(N2)) {
6875 // PINSR* works with constant index.
6882 X86TargetLowering::LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const {
6883 EVT VT = Op.getValueType();
6884 EVT EltVT = VT.getVectorElementType();
6886 DebugLoc dl = Op.getDebugLoc();
6887 SDValue N0 = Op.getOperand(0);
6888 SDValue N1 = Op.getOperand(1);
6889 SDValue N2 = Op.getOperand(2);
6891 // If this is a 256-bit vector result, first extract the 128-bit vector,
6892 // insert the element into the extracted half and then place it back.
6893 if (VT.getSizeInBits() == 256) {
6894 if (!isa<ConstantSDNode>(N2))
6897 // Get the desired 128-bit vector half.
6898 unsigned NumElems = VT.getVectorNumElements();
6899 unsigned IdxVal = cast<ConstantSDNode>(N2)->getZExtValue();
6900 bool Upper = IdxVal >= NumElems/2;
6901 SDValue Ins128Idx = DAG.getConstant(Upper ? NumElems/2 : 0, MVT::i32);
6902 SDValue V = Extract128BitVector(N0, Ins128Idx, DAG, dl);
6904 // Insert the element into the desired half.
6905 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, V.getValueType(), V,
6906 N1, Upper ? DAG.getConstant(IdxVal-NumElems/2, MVT::i32) : N2);
6908 // Insert the changed part back to the 256-bit vector
6909 return Insert128BitVector(N0, V, Ins128Idx, DAG, dl);
6912 if (Subtarget->hasSSE41())
6913 return LowerINSERT_VECTOR_ELT_SSE4(Op, DAG);
6915 if (EltVT == MVT::i8)
6918 if (EltVT.getSizeInBits() == 16 && isa<ConstantSDNode>(N2)) {
6919 // Transform it so it match pinsrw which expects a 16-bit value in a GR32
6920 // as its second argument.
6921 if (N1.getValueType() != MVT::i32)
6922 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
6923 if (N2.getValueType() != MVT::i32)
6924 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
6925 return DAG.getNode(X86ISD::PINSRW, dl, VT, N0, N1, N2);
6931 X86TargetLowering::LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) const {
6932 LLVMContext *Context = DAG.getContext();
6933 DebugLoc dl = Op.getDebugLoc();
6934 EVT OpVT = Op.getValueType();
6936 // If this is a 256-bit vector result, first insert into a 128-bit
6937 // vector and then insert into the 256-bit vector.
6938 if (OpVT.getSizeInBits() > 128) {
6939 // Insert into a 128-bit vector.
6940 EVT VT128 = EVT::getVectorVT(*Context,
6941 OpVT.getVectorElementType(),
6942 OpVT.getVectorNumElements() / 2);
6944 Op = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT128, Op.getOperand(0));
6946 // Insert the 128-bit vector.
6947 return Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, OpVT), Op,
6948 DAG.getConstant(0, MVT::i32),
6952 if (Op.getValueType() == MVT::v1i64 &&
6953 Op.getOperand(0).getValueType() == MVT::i64)
6954 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v1i64, Op.getOperand(0));
6956 SDValue AnyExt = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, Op.getOperand(0));
6957 assert(Op.getValueType().getSimpleVT().getSizeInBits() == 128 &&
6958 "Expected an SSE type!");
6959 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(),
6960 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,AnyExt));
6963 // Lower a node with an EXTRACT_SUBVECTOR opcode. This may result in
6964 // a simple subregister reference or explicit instructions to grab
6965 // upper bits of a vector.
6967 X86TargetLowering::LowerEXTRACT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const {
6968 if (Subtarget->hasAVX()) {
6969 DebugLoc dl = Op.getNode()->getDebugLoc();
6970 SDValue Vec = Op.getNode()->getOperand(0);
6971 SDValue Idx = Op.getNode()->getOperand(1);
6973 if (Op.getNode()->getValueType(0).getSizeInBits() == 128
6974 && Vec.getNode()->getValueType(0).getSizeInBits() == 256) {
6975 return Extract128BitVector(Vec, Idx, DAG, dl);
6981 // Lower a node with an INSERT_SUBVECTOR opcode. This may result in a
6982 // simple superregister reference or explicit instructions to insert
6983 // the upper bits of a vector.
6985 X86TargetLowering::LowerINSERT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const {
6986 if (Subtarget->hasAVX()) {
6987 DebugLoc dl = Op.getNode()->getDebugLoc();
6988 SDValue Vec = Op.getNode()->getOperand(0);
6989 SDValue SubVec = Op.getNode()->getOperand(1);
6990 SDValue Idx = Op.getNode()->getOperand(2);
6992 if (Op.getNode()->getValueType(0).getSizeInBits() == 256
6993 && SubVec.getNode()->getValueType(0).getSizeInBits() == 128) {
6994 return Insert128BitVector(Vec, SubVec, Idx, DAG, dl);
7000 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
7001 // their target countpart wrapped in the X86ISD::Wrapper node. Suppose N is
7002 // one of the above mentioned nodes. It has to be wrapped because otherwise
7003 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
7004 // be used to form addressing mode. These wrapped nodes will be selected
7007 X86TargetLowering::LowerConstantPool(SDValue Op, SelectionDAG &DAG) const {
7008 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
7010 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7012 unsigned char OpFlag = 0;
7013 unsigned WrapperKind = X86ISD::Wrapper;
7014 CodeModel::Model M = getTargetMachine().getCodeModel();
7016 if (Subtarget->isPICStyleRIPRel() &&
7017 (M == CodeModel::Small || M == CodeModel::Kernel))
7018 WrapperKind = X86ISD::WrapperRIP;
7019 else if (Subtarget->isPICStyleGOT())
7020 OpFlag = X86II::MO_GOTOFF;
7021 else if (Subtarget->isPICStyleStubPIC())
7022 OpFlag = X86II::MO_PIC_BASE_OFFSET;
7024 SDValue Result = DAG.getTargetConstantPool(CP->getConstVal(), getPointerTy(),
7026 CP->getOffset(), OpFlag);
7027 DebugLoc DL = CP->getDebugLoc();
7028 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7029 // With PIC, the address is actually $g + Offset.
7031 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7032 DAG.getNode(X86ISD::GlobalBaseReg,
7033 DebugLoc(), getPointerTy()),
7040 SDValue X86TargetLowering::LowerJumpTable(SDValue Op, SelectionDAG &DAG) const {
7041 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
7043 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7045 unsigned char OpFlag = 0;
7046 unsigned WrapperKind = X86ISD::Wrapper;
7047 CodeModel::Model M = getTargetMachine().getCodeModel();
7049 if (Subtarget->isPICStyleRIPRel() &&
7050 (M == CodeModel::Small || M == CodeModel::Kernel))
7051 WrapperKind = X86ISD::WrapperRIP;
7052 else if (Subtarget->isPICStyleGOT())
7053 OpFlag = X86II::MO_GOTOFF;
7054 else if (Subtarget->isPICStyleStubPIC())
7055 OpFlag = X86II::MO_PIC_BASE_OFFSET;
7057 SDValue Result = DAG.getTargetJumpTable(JT->getIndex(), getPointerTy(),
7059 DebugLoc DL = JT->getDebugLoc();
7060 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7062 // With PIC, the address is actually $g + Offset.
7064 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7065 DAG.getNode(X86ISD::GlobalBaseReg,
7066 DebugLoc(), getPointerTy()),
7073 X86TargetLowering::LowerExternalSymbol(SDValue Op, SelectionDAG &DAG) const {
7074 const char *Sym = cast<ExternalSymbolSDNode>(Op)->getSymbol();
7076 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7078 unsigned char OpFlag = 0;
7079 unsigned WrapperKind = X86ISD::Wrapper;
7080 CodeModel::Model M = getTargetMachine().getCodeModel();
7082 if (Subtarget->isPICStyleRIPRel() &&
7083 (M == CodeModel::Small || M == CodeModel::Kernel)) {
7084 if (Subtarget->isTargetDarwin() || Subtarget->isTargetELF())
7085 OpFlag = X86II::MO_GOTPCREL;
7086 WrapperKind = X86ISD::WrapperRIP;
7087 } else if (Subtarget->isPICStyleGOT()) {
7088 OpFlag = X86II::MO_GOT;
7089 } else if (Subtarget->isPICStyleStubPIC()) {
7090 OpFlag = X86II::MO_DARWIN_NONLAZY_PIC_BASE;
7091 } else if (Subtarget->isPICStyleStubNoDynamic()) {
7092 OpFlag = X86II::MO_DARWIN_NONLAZY;
7095 SDValue Result = DAG.getTargetExternalSymbol(Sym, getPointerTy(), OpFlag);
7097 DebugLoc DL = Op.getDebugLoc();
7098 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7101 // With PIC, the address is actually $g + Offset.
7102 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
7103 !Subtarget->is64Bit()) {
7104 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7105 DAG.getNode(X86ISD::GlobalBaseReg,
7106 DebugLoc(), getPointerTy()),
7110 // For symbols that require a load from a stub to get the address, emit the
7112 if (isGlobalStubReference(OpFlag))
7113 Result = DAG.getLoad(getPointerTy(), DL, DAG.getEntryNode(), Result,
7114 MachinePointerInfo::getGOT(), false, false, false, 0);
7120 X86TargetLowering::LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const {
7121 // Create the TargetBlockAddressAddress node.
7122 unsigned char OpFlags =
7123 Subtarget->ClassifyBlockAddressReference();
7124 CodeModel::Model M = getTargetMachine().getCodeModel();
7125 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
7126 DebugLoc dl = Op.getDebugLoc();
7127 SDValue Result = DAG.getBlockAddress(BA, getPointerTy(),
7128 /*isTarget=*/true, OpFlags);
7130 if (Subtarget->isPICStyleRIPRel() &&
7131 (M == CodeModel::Small || M == CodeModel::Kernel))
7132 Result = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Result);
7134 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
7136 // With PIC, the address is actually $g + Offset.
7137 if (isGlobalRelativeToPICBase(OpFlags)) {
7138 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
7139 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
7147 X86TargetLowering::LowerGlobalAddress(const GlobalValue *GV, DebugLoc dl,
7149 SelectionDAG &DAG) const {
7150 // Create the TargetGlobalAddress node, folding in the constant
7151 // offset if it is legal.
7152 unsigned char OpFlags =
7153 Subtarget->ClassifyGlobalReference(GV, getTargetMachine());
7154 CodeModel::Model M = getTargetMachine().getCodeModel();
7156 if (OpFlags == X86II::MO_NO_FLAG &&
7157 X86::isOffsetSuitableForCodeModel(Offset, M)) {
7158 // A direct static reference to a global.
7159 Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), Offset);
7162 Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), 0, OpFlags);
7165 if (Subtarget->isPICStyleRIPRel() &&
7166 (M == CodeModel::Small || M == CodeModel::Kernel))
7167 Result = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Result);
7169 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
7171 // With PIC, the address is actually $g + Offset.
7172 if (isGlobalRelativeToPICBase(OpFlags)) {
7173 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
7174 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
7178 // For globals that require a load from a stub to get the address, emit the
7180 if (isGlobalStubReference(OpFlags))
7181 Result = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(), Result,
7182 MachinePointerInfo::getGOT(), false, false, false, 0);
7184 // If there was a non-zero offset that we didn't fold, create an explicit
7187 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(), Result,
7188 DAG.getConstant(Offset, getPointerTy()));
7194 X86TargetLowering::LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const {
7195 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
7196 int64_t Offset = cast<GlobalAddressSDNode>(Op)->getOffset();
7197 return LowerGlobalAddress(GV, Op.getDebugLoc(), Offset, DAG);
7201 GetTLSADDR(SelectionDAG &DAG, SDValue Chain, GlobalAddressSDNode *GA,
7202 SDValue *InFlag, const EVT PtrVT, unsigned ReturnReg,
7203 unsigned char OperandFlags) {
7204 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
7205 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
7206 DebugLoc dl = GA->getDebugLoc();
7207 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
7208 GA->getValueType(0),
7212 SDValue Ops[] = { Chain, TGA, *InFlag };
7213 Chain = DAG.getNode(X86ISD::TLSADDR, dl, NodeTys, Ops, 3);
7215 SDValue Ops[] = { Chain, TGA };
7216 Chain = DAG.getNode(X86ISD::TLSADDR, dl, NodeTys, Ops, 2);
7219 // TLSADDR will be codegen'ed as call. Inform MFI that function has calls.
7220 MFI->setAdjustsStack(true);
7222 SDValue Flag = Chain.getValue(1);
7223 return DAG.getCopyFromReg(Chain, dl, ReturnReg, PtrVT, Flag);
7226 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 32 bit
7228 LowerToTLSGeneralDynamicModel32(GlobalAddressSDNode *GA, SelectionDAG &DAG,
7231 DebugLoc dl = GA->getDebugLoc(); // ? function entry point might be better
7232 SDValue Chain = DAG.getCopyToReg(DAG.getEntryNode(), dl, X86::EBX,
7233 DAG.getNode(X86ISD::GlobalBaseReg,
7234 DebugLoc(), PtrVT), InFlag);
7235 InFlag = Chain.getValue(1);
7237 return GetTLSADDR(DAG, Chain, GA, &InFlag, PtrVT, X86::EAX, X86II::MO_TLSGD);
7240 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 64 bit
7242 LowerToTLSGeneralDynamicModel64(GlobalAddressSDNode *GA, SelectionDAG &DAG,
7244 return GetTLSADDR(DAG, DAG.getEntryNode(), GA, NULL, PtrVT,
7245 X86::RAX, X86II::MO_TLSGD);
7248 // Lower ISD::GlobalTLSAddress using the "initial exec" (for no-pic) or
7249 // "local exec" model.
7250 static SDValue LowerToTLSExecModel(GlobalAddressSDNode *GA, SelectionDAG &DAG,
7251 const EVT PtrVT, TLSModel::Model model,
7253 DebugLoc dl = GA->getDebugLoc();
7255 // Get the Thread Pointer, which is %gs:0 (32-bit) or %fs:0 (64-bit).
7256 Value *Ptr = Constant::getNullValue(Type::getInt8PtrTy(*DAG.getContext(),
7257 is64Bit ? 257 : 256));
7259 SDValue ThreadPointer = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
7260 DAG.getIntPtrConstant(0),
7261 MachinePointerInfo(Ptr),
7262 false, false, false, 0);
7264 unsigned char OperandFlags = 0;
7265 // Most TLS accesses are not RIP relative, even on x86-64. One exception is
7267 unsigned WrapperKind = X86ISD::Wrapper;
7268 if (model == TLSModel::LocalExec) {
7269 OperandFlags = is64Bit ? X86II::MO_TPOFF : X86II::MO_NTPOFF;
7270 } else if (is64Bit) {
7271 assert(model == TLSModel::InitialExec);
7272 OperandFlags = X86II::MO_GOTTPOFF;
7273 WrapperKind = X86ISD::WrapperRIP;
7275 assert(model == TLSModel::InitialExec);
7276 OperandFlags = X86II::MO_INDNTPOFF;
7279 // emit "addl x@ntpoff,%eax" (local exec) or "addl x@indntpoff,%eax" (initial
7281 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
7282 GA->getValueType(0),
7283 GA->getOffset(), OperandFlags);
7284 SDValue Offset = DAG.getNode(WrapperKind, dl, PtrVT, TGA);
7286 if (model == TLSModel::InitialExec)
7287 Offset = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Offset,
7288 MachinePointerInfo::getGOT(), false, false, false, 0);
7290 // The address of the thread local variable is the add of the thread
7291 // pointer with the offset of the variable.
7292 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
7296 X86TargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const {
7298 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
7299 const GlobalValue *GV = GA->getGlobal();
7301 if (Subtarget->isTargetELF()) {
7302 // TODO: implement the "local dynamic" model
7303 // TODO: implement the "initial exec"model for pic executables
7305 // If GV is an alias then use the aliasee for determining
7306 // thread-localness.
7307 if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV))
7308 GV = GA->resolveAliasedGlobal(false);
7310 TLSModel::Model model
7311 = getTLSModel(GV, getTargetMachine().getRelocationModel());
7314 case TLSModel::GeneralDynamic:
7315 case TLSModel::LocalDynamic: // not implemented
7316 if (Subtarget->is64Bit())
7317 return LowerToTLSGeneralDynamicModel64(GA, DAG, getPointerTy());
7318 return LowerToTLSGeneralDynamicModel32(GA, DAG, getPointerTy());
7320 case TLSModel::InitialExec:
7321 case TLSModel::LocalExec:
7322 return LowerToTLSExecModel(GA, DAG, getPointerTy(), model,
7323 Subtarget->is64Bit());
7325 } else if (Subtarget->isTargetDarwin()) {
7326 // Darwin only has one model of TLS. Lower to that.
7327 unsigned char OpFlag = 0;
7328 unsigned WrapperKind = Subtarget->isPICStyleRIPRel() ?
7329 X86ISD::WrapperRIP : X86ISD::Wrapper;
7331 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7333 bool PIC32 = (getTargetMachine().getRelocationModel() == Reloc::PIC_) &&
7334 !Subtarget->is64Bit();
7336 OpFlag = X86II::MO_TLVP_PIC_BASE;
7338 OpFlag = X86II::MO_TLVP;
7339 DebugLoc DL = Op.getDebugLoc();
7340 SDValue Result = DAG.getTargetGlobalAddress(GA->getGlobal(), DL,
7341 GA->getValueType(0),
7342 GA->getOffset(), OpFlag);
7343 SDValue Offset = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7345 // With PIC32, the address is actually $g + Offset.
7347 Offset = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7348 DAG.getNode(X86ISD::GlobalBaseReg,
7349 DebugLoc(), getPointerTy()),
7352 // Lowering the machine isd will make sure everything is in the right
7354 SDValue Chain = DAG.getEntryNode();
7355 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
7356 SDValue Args[] = { Chain, Offset };
7357 Chain = DAG.getNode(X86ISD::TLSCALL, DL, NodeTys, Args, 2);
7359 // TLSCALL will be codegen'ed as call. Inform MFI that function has calls.
7360 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
7361 MFI->setAdjustsStack(true);
7363 // And our return value (tls address) is in the standard call return value
7365 unsigned Reg = Subtarget->is64Bit() ? X86::RAX : X86::EAX;
7366 return DAG.getCopyFromReg(Chain, DL, Reg, getPointerTy(),
7370 llvm_unreachable("TLS not implemented for this target.");
7374 /// LowerShiftParts - Lower SRA_PARTS and friends, which return two i32 values
7375 /// and take a 2 x i32 value to shift plus a shift amount.
7376 SDValue X86TargetLowering::LowerShiftParts(SDValue Op, SelectionDAG &DAG) const{
7377 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
7378 EVT VT = Op.getValueType();
7379 unsigned VTBits = VT.getSizeInBits();
7380 DebugLoc dl = Op.getDebugLoc();
7381 bool isSRA = Op.getOpcode() == ISD::SRA_PARTS;
7382 SDValue ShOpLo = Op.getOperand(0);
7383 SDValue ShOpHi = Op.getOperand(1);
7384 SDValue ShAmt = Op.getOperand(2);
7385 SDValue Tmp1 = isSRA ? DAG.getNode(ISD::SRA, dl, VT, ShOpHi,
7386 DAG.getConstant(VTBits - 1, MVT::i8))
7387 : DAG.getConstant(0, VT);
7390 if (Op.getOpcode() == ISD::SHL_PARTS) {
7391 Tmp2 = DAG.getNode(X86ISD::SHLD, dl, VT, ShOpHi, ShOpLo, ShAmt);
7392 Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt);
7394 Tmp2 = DAG.getNode(X86ISD::SHRD, dl, VT, ShOpLo, ShOpHi, ShAmt);
7395 Tmp3 = DAG.getNode(isSRA ? ISD::SRA : ISD::SRL, dl, VT, ShOpHi, ShAmt);
7398 SDValue AndNode = DAG.getNode(ISD::AND, dl, MVT::i8, ShAmt,
7399 DAG.getConstant(VTBits, MVT::i8));
7400 SDValue Cond = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
7401 AndNode, DAG.getConstant(0, MVT::i8));
7404 SDValue CC = DAG.getConstant(X86::COND_NE, MVT::i8);
7405 SDValue Ops0[4] = { Tmp2, Tmp3, CC, Cond };
7406 SDValue Ops1[4] = { Tmp3, Tmp1, CC, Cond };
7408 if (Op.getOpcode() == ISD::SHL_PARTS) {
7409 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0, 4);
7410 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1, 4);
7412 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0, 4);
7413 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1, 4);
7416 SDValue Ops[2] = { Lo, Hi };
7417 return DAG.getMergeValues(Ops, 2, dl);
7420 SDValue X86TargetLowering::LowerSINT_TO_FP(SDValue Op,
7421 SelectionDAG &DAG) const {
7422 EVT SrcVT = Op.getOperand(0).getValueType();
7424 if (SrcVT.isVector())
7427 assert(SrcVT.getSimpleVT() <= MVT::i64 && SrcVT.getSimpleVT() >= MVT::i16 &&
7428 "Unknown SINT_TO_FP to lower!");
7430 // These are really Legal; return the operand so the caller accepts it as
7432 if (SrcVT == MVT::i32 && isScalarFPTypeInSSEReg(Op.getValueType()))
7434 if (SrcVT == MVT::i64 && isScalarFPTypeInSSEReg(Op.getValueType()) &&
7435 Subtarget->is64Bit()) {
7439 DebugLoc dl = Op.getDebugLoc();
7440 unsigned Size = SrcVT.getSizeInBits()/8;
7441 MachineFunction &MF = DAG.getMachineFunction();
7442 int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size, false);
7443 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7444 SDValue Chain = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
7446 MachinePointerInfo::getFixedStack(SSFI),
7448 return BuildFILD(Op, SrcVT, Chain, StackSlot, DAG);
7451 SDValue X86TargetLowering::BuildFILD(SDValue Op, EVT SrcVT, SDValue Chain,
7453 SelectionDAG &DAG) const {
7455 DebugLoc DL = Op.getDebugLoc();
7457 bool useSSE = isScalarFPTypeInSSEReg(Op.getValueType());
7459 Tys = DAG.getVTList(MVT::f64, MVT::Other, MVT::Glue);
7461 Tys = DAG.getVTList(Op.getValueType(), MVT::Other);
7463 unsigned ByteSize = SrcVT.getSizeInBits()/8;
7465 FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(StackSlot);
7466 MachineMemOperand *MMO;
7468 int SSFI = FI->getIndex();
7470 DAG.getMachineFunction()
7471 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7472 MachineMemOperand::MOLoad, ByteSize, ByteSize);
7474 MMO = cast<LoadSDNode>(StackSlot)->getMemOperand();
7475 StackSlot = StackSlot.getOperand(1);
7477 SDValue Ops[] = { Chain, StackSlot, DAG.getValueType(SrcVT) };
7478 SDValue Result = DAG.getMemIntrinsicNode(useSSE ? X86ISD::FILD_FLAG :
7480 Tys, Ops, array_lengthof(Ops),
7484 Chain = Result.getValue(1);
7485 SDValue InFlag = Result.getValue(2);
7487 // FIXME: Currently the FST is flagged to the FILD_FLAG. This
7488 // shouldn't be necessary except that RFP cannot be live across
7489 // multiple blocks. When stackifier is fixed, they can be uncoupled.
7490 MachineFunction &MF = DAG.getMachineFunction();
7491 unsigned SSFISize = Op.getValueType().getSizeInBits()/8;
7492 int SSFI = MF.getFrameInfo()->CreateStackObject(SSFISize, SSFISize, false);
7493 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7494 Tys = DAG.getVTList(MVT::Other);
7496 Chain, Result, StackSlot, DAG.getValueType(Op.getValueType()), InFlag
7498 MachineMemOperand *MMO =
7499 DAG.getMachineFunction()
7500 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7501 MachineMemOperand::MOStore, SSFISize, SSFISize);
7503 Chain = DAG.getMemIntrinsicNode(X86ISD::FST, DL, Tys,
7504 Ops, array_lengthof(Ops),
7505 Op.getValueType(), MMO);
7506 Result = DAG.getLoad(Op.getValueType(), DL, Chain, StackSlot,
7507 MachinePointerInfo::getFixedStack(SSFI),
7508 false, false, false, 0);
7514 // LowerUINT_TO_FP_i64 - 64-bit unsigned integer to double expansion.
7515 SDValue X86TargetLowering::LowerUINT_TO_FP_i64(SDValue Op,
7516 SelectionDAG &DAG) const {
7517 // This algorithm is not obvious. Here it is what we're trying to output:
7520 punpckldq (c0), %xmm0 // c0: (uint4){ 0x43300000U, 0x45300000U, 0U, 0U }
7521 subpd (c1), %xmm0 // c1: (double2){ 0x1.0p52, 0x1.0p52 * 0x1.0p32 }
7525 pshufd $0x4e, %xmm0, %xmm1
7530 DebugLoc dl = Op.getDebugLoc();
7531 LLVMContext *Context = DAG.getContext();
7533 // Build some magic constants.
7534 SmallVector<Constant*,4> CV0;
7535 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0x43300000)));
7536 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0x45300000)));
7537 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0)));
7538 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0)));
7539 Constant *C0 = ConstantVector::get(CV0);
7540 SDValue CPIdx0 = DAG.getConstantPool(C0, getPointerTy(), 16);
7542 SmallVector<Constant*,2> CV1;
7544 ConstantFP::get(*Context, APFloat(APInt(64, 0x4330000000000000ULL))));
7546 ConstantFP::get(*Context, APFloat(APInt(64, 0x4530000000000000ULL))));
7547 Constant *C1 = ConstantVector::get(CV1);
7548 SDValue CPIdx1 = DAG.getConstantPool(C1, getPointerTy(), 16);
7550 // Load the 64-bit value into an XMM register.
7551 SDValue XR1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64,
7553 SDValue CLod0 = DAG.getLoad(MVT::v4i32, dl, DAG.getEntryNode(), CPIdx0,
7554 MachinePointerInfo::getConstantPool(),
7555 false, false, false, 16);
7556 SDValue Unpck1 = getUnpackl(DAG, dl, MVT::v4i32,
7557 DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, XR1),
7560 SDValue CLod1 = DAG.getLoad(MVT::v2f64, dl, CLod0.getValue(1), CPIdx1,
7561 MachinePointerInfo::getConstantPool(),
7562 false, false, false, 16);
7563 SDValue XR2F = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Unpck1);
7564 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::v2f64, XR2F, CLod1);
7567 if (Subtarget->hasSSE3()) {
7568 // FIXME: The 'haddpd' instruction may be slower than 'movhlps + addsd'.
7569 Result = DAG.getNode(X86ISD::FHADD, dl, MVT::v2f64, Sub, Sub);
7571 SDValue S2F = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Sub);
7572 SDValue Shuffle = getTargetShuffleNode(X86ISD::PSHUFD, dl, MVT::v4i32,
7574 Result = DAG.getNode(ISD::FADD, dl, MVT::v2f64,
7575 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Shuffle),
7579 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Result,
7580 DAG.getIntPtrConstant(0));
7583 // LowerUINT_TO_FP_i32 - 32-bit unsigned integer to float expansion.
7584 SDValue X86TargetLowering::LowerUINT_TO_FP_i32(SDValue Op,
7585 SelectionDAG &DAG) const {
7586 DebugLoc dl = Op.getDebugLoc();
7587 // FP constant to bias correct the final result.
7588 SDValue Bias = DAG.getConstantFP(BitsToDouble(0x4330000000000000ULL),
7591 // Load the 32-bit value into an XMM register.
7592 SDValue Load = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,
7595 // Zero out the upper parts of the register.
7596 Load = getShuffleVectorZeroOrUndef(Load, 0, true, Subtarget, DAG);
7598 Load = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
7599 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Load),
7600 DAG.getIntPtrConstant(0));
7602 // Or the load with the bias.
7603 SDValue Or = DAG.getNode(ISD::OR, dl, MVT::v2i64,
7604 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
7605 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
7607 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
7608 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
7609 MVT::v2f64, Bias)));
7610 Or = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
7611 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Or),
7612 DAG.getIntPtrConstant(0));
7614 // Subtract the bias.
7615 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::f64, Or, Bias);
7617 // Handle final rounding.
7618 EVT DestVT = Op.getValueType();
7620 if (DestVT.bitsLT(MVT::f64)) {
7621 return DAG.getNode(ISD::FP_ROUND, dl, DestVT, Sub,
7622 DAG.getIntPtrConstant(0));
7623 } else if (DestVT.bitsGT(MVT::f64)) {
7624 return DAG.getNode(ISD::FP_EXTEND, dl, DestVT, Sub);
7627 // Handle final rounding.
7631 SDValue X86TargetLowering::LowerUINT_TO_FP(SDValue Op,
7632 SelectionDAG &DAG) const {
7633 SDValue N0 = Op.getOperand(0);
7634 DebugLoc dl = Op.getDebugLoc();
7636 // Since UINT_TO_FP is legal (it's marked custom), dag combiner won't
7637 // optimize it to a SINT_TO_FP when the sign bit is known zero. Perform
7638 // the optimization here.
7639 if (DAG.SignBitIsZero(N0))
7640 return DAG.getNode(ISD::SINT_TO_FP, dl, Op.getValueType(), N0);
7642 EVT SrcVT = N0.getValueType();
7643 EVT DstVT = Op.getValueType();
7644 if (SrcVT == MVT::i64 && DstVT == MVT::f64 && X86ScalarSSEf64)
7645 return LowerUINT_TO_FP_i64(Op, DAG);
7646 else if (SrcVT == MVT::i32 && X86ScalarSSEf64)
7647 return LowerUINT_TO_FP_i32(Op, DAG);
7648 else if (Subtarget->is64Bit() &&
7649 SrcVT == MVT::i64 && DstVT == MVT::f32)
7652 // Make a 64-bit buffer, and use it to build an FILD.
7653 SDValue StackSlot = DAG.CreateStackTemporary(MVT::i64);
7654 if (SrcVT == MVT::i32) {
7655 SDValue WordOff = DAG.getConstant(4, getPointerTy());
7656 SDValue OffsetSlot = DAG.getNode(ISD::ADD, dl,
7657 getPointerTy(), StackSlot, WordOff);
7658 SDValue Store1 = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
7659 StackSlot, MachinePointerInfo(),
7661 SDValue Store2 = DAG.getStore(Store1, dl, DAG.getConstant(0, MVT::i32),
7662 OffsetSlot, MachinePointerInfo(),
7664 SDValue Fild = BuildFILD(Op, MVT::i64, Store2, StackSlot, DAG);
7668 assert(SrcVT == MVT::i64 && "Unexpected type in UINT_TO_FP");
7669 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
7670 StackSlot, MachinePointerInfo(),
7672 // For i64 source, we need to add the appropriate power of 2 if the input
7673 // was negative. This is the same as the optimization in
7674 // DAGTypeLegalizer::ExpandIntOp_UNIT_TO_FP, and for it to be safe here,
7675 // we must be careful to do the computation in x87 extended precision, not
7676 // in SSE. (The generic code can't know it's OK to do this, or how to.)
7677 int SSFI = cast<FrameIndexSDNode>(StackSlot)->getIndex();
7678 MachineMemOperand *MMO =
7679 DAG.getMachineFunction()
7680 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7681 MachineMemOperand::MOLoad, 8, 8);
7683 SDVTList Tys = DAG.getVTList(MVT::f80, MVT::Other);
7684 SDValue Ops[] = { Store, StackSlot, DAG.getValueType(MVT::i64) };
7685 SDValue Fild = DAG.getMemIntrinsicNode(X86ISD::FILD, dl, Tys, Ops, 3,
7688 APInt FF(32, 0x5F800000ULL);
7690 // Check whether the sign bit is set.
7691 SDValue SignSet = DAG.getSetCC(dl, getSetCCResultType(MVT::i64),
7692 Op.getOperand(0), DAG.getConstant(0, MVT::i64),
7695 // Build a 64 bit pair (0, FF) in the constant pool, with FF in the lo bits.
7696 SDValue FudgePtr = DAG.getConstantPool(
7697 ConstantInt::get(*DAG.getContext(), FF.zext(64)),
7700 // Get a pointer to FF if the sign bit was set, or to 0 otherwise.
7701 SDValue Zero = DAG.getIntPtrConstant(0);
7702 SDValue Four = DAG.getIntPtrConstant(4);
7703 SDValue Offset = DAG.getNode(ISD::SELECT, dl, Zero.getValueType(), SignSet,
7705 FudgePtr = DAG.getNode(ISD::ADD, dl, getPointerTy(), FudgePtr, Offset);
7707 // Load the value out, extending it from f32 to f80.
7708 // FIXME: Avoid the extend by constructing the right constant pool?
7709 SDValue Fudge = DAG.getExtLoad(ISD::EXTLOAD, dl, MVT::f80, DAG.getEntryNode(),
7710 FudgePtr, MachinePointerInfo::getConstantPool(),
7711 MVT::f32, false, false, 4);
7712 // Extend everything to 80 bits to force it to be done on x87.
7713 SDValue Add = DAG.getNode(ISD::FADD, dl, MVT::f80, Fild, Fudge);
7714 return DAG.getNode(ISD::FP_ROUND, dl, DstVT, Add, DAG.getIntPtrConstant(0));
7717 std::pair<SDValue,SDValue> X86TargetLowering::
7718 FP_TO_INTHelper(SDValue Op, SelectionDAG &DAG, bool IsSigned) const {
7719 DebugLoc DL = Op.getDebugLoc();
7721 EVT DstTy = Op.getValueType();
7724 assert(DstTy == MVT::i32 && "Unexpected FP_TO_UINT");
7728 assert(DstTy.getSimpleVT() <= MVT::i64 &&
7729 DstTy.getSimpleVT() >= MVT::i16 &&
7730 "Unknown FP_TO_SINT to lower!");
7732 // These are really Legal.
7733 if (DstTy == MVT::i32 &&
7734 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
7735 return std::make_pair(SDValue(), SDValue());
7736 if (Subtarget->is64Bit() &&
7737 DstTy == MVT::i64 &&
7738 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
7739 return std::make_pair(SDValue(), SDValue());
7741 // We lower FP->sint64 into FISTP64, followed by a load, all to a temporary
7743 MachineFunction &MF = DAG.getMachineFunction();
7744 unsigned MemSize = DstTy.getSizeInBits()/8;
7745 int SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize, false);
7746 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7751 switch (DstTy.getSimpleVT().SimpleTy) {
7752 default: llvm_unreachable("Invalid FP_TO_SINT to lower!");
7753 case MVT::i16: Opc = X86ISD::FP_TO_INT16_IN_MEM; break;
7754 case MVT::i32: Opc = X86ISD::FP_TO_INT32_IN_MEM; break;
7755 case MVT::i64: Opc = X86ISD::FP_TO_INT64_IN_MEM; break;
7758 SDValue Chain = DAG.getEntryNode();
7759 SDValue Value = Op.getOperand(0);
7760 EVT TheVT = Op.getOperand(0).getValueType();
7761 if (isScalarFPTypeInSSEReg(TheVT)) {
7762 assert(DstTy == MVT::i64 && "Invalid FP_TO_SINT to lower!");
7763 Chain = DAG.getStore(Chain, DL, Value, StackSlot,
7764 MachinePointerInfo::getFixedStack(SSFI),
7766 SDVTList Tys = DAG.getVTList(Op.getOperand(0).getValueType(), MVT::Other);
7768 Chain, StackSlot, DAG.getValueType(TheVT)
7771 MachineMemOperand *MMO =
7772 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7773 MachineMemOperand::MOLoad, MemSize, MemSize);
7774 Value = DAG.getMemIntrinsicNode(X86ISD::FLD, DL, Tys, Ops, 3,
7776 Chain = Value.getValue(1);
7777 SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize, false);
7778 StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7781 MachineMemOperand *MMO =
7782 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7783 MachineMemOperand::MOStore, MemSize, MemSize);
7785 // Build the FP_TO_INT*_IN_MEM
7786 SDValue Ops[] = { Chain, Value, StackSlot };
7787 SDValue FIST = DAG.getMemIntrinsicNode(Opc, DL, DAG.getVTList(MVT::Other),
7788 Ops, 3, DstTy, MMO);
7790 return std::make_pair(FIST, StackSlot);
7793 SDValue X86TargetLowering::LowerFP_TO_SINT(SDValue Op,
7794 SelectionDAG &DAG) const {
7795 if (Op.getValueType().isVector())
7798 std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG, true);
7799 SDValue FIST = Vals.first, StackSlot = Vals.second;
7800 // If FP_TO_INTHelper failed, the node is actually supposed to be Legal.
7801 if (FIST.getNode() == 0) return Op;
7804 return DAG.getLoad(Op.getValueType(), Op.getDebugLoc(),
7805 FIST, StackSlot, MachinePointerInfo(),
7806 false, false, false, 0);
7809 SDValue X86TargetLowering::LowerFP_TO_UINT(SDValue Op,
7810 SelectionDAG &DAG) const {
7811 std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG, false);
7812 SDValue FIST = Vals.first, StackSlot = Vals.second;
7813 assert(FIST.getNode() && "Unexpected failure");
7816 return DAG.getLoad(Op.getValueType(), Op.getDebugLoc(),
7817 FIST, StackSlot, MachinePointerInfo(),
7818 false, false, false, 0);
7821 SDValue X86TargetLowering::LowerFABS(SDValue Op,
7822 SelectionDAG &DAG) const {
7823 LLVMContext *Context = DAG.getContext();
7824 DebugLoc dl = Op.getDebugLoc();
7825 EVT VT = Op.getValueType();
7828 EltVT = VT.getVectorElementType();
7830 if (EltVT == MVT::f64) {
7831 C = ConstantVector::getSplat(2,
7832 ConstantFP::get(*Context, APFloat(APInt(64, ~(1ULL << 63)))));
7834 C = ConstantVector::getSplat(4,
7835 ConstantFP::get(*Context, APFloat(APInt(32, ~(1U << 31)))));
7837 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7838 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
7839 MachinePointerInfo::getConstantPool(),
7840 false, false, false, 16);
7841 return DAG.getNode(X86ISD::FAND, dl, VT, Op.getOperand(0), Mask);
7844 SDValue X86TargetLowering::LowerFNEG(SDValue Op, SelectionDAG &DAG) const {
7845 LLVMContext *Context = DAG.getContext();
7846 DebugLoc dl = Op.getDebugLoc();
7847 EVT VT = Op.getValueType();
7849 unsigned NumElts = VT == MVT::f64 ? 2 : 4;
7850 if (VT.isVector()) {
7851 EltVT = VT.getVectorElementType();
7852 NumElts = VT.getVectorNumElements();
7855 if (EltVT == MVT::f64)
7856 C = ConstantFP::get(*Context, APFloat(APInt(64, 1ULL << 63)));
7858 C = ConstantFP::get(*Context, APFloat(APInt(32, 1U << 31)));
7859 C = ConstantVector::getSplat(NumElts, C);
7860 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7861 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
7862 MachinePointerInfo::getConstantPool(),
7863 false, false, false, 16);
7864 if (VT.isVector()) {
7865 MVT XORVT = VT.getSizeInBits() == 128 ? MVT::v2i64 : MVT::v4i64;
7866 return DAG.getNode(ISD::BITCAST, dl, VT,
7867 DAG.getNode(ISD::XOR, dl, XORVT,
7868 DAG.getNode(ISD::BITCAST, dl, XORVT,
7870 DAG.getNode(ISD::BITCAST, dl, XORVT, Mask)));
7872 return DAG.getNode(X86ISD::FXOR, dl, VT, Op.getOperand(0), Mask);
7876 SDValue X86TargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
7877 LLVMContext *Context = DAG.getContext();
7878 SDValue Op0 = Op.getOperand(0);
7879 SDValue Op1 = Op.getOperand(1);
7880 DebugLoc dl = Op.getDebugLoc();
7881 EVT VT = Op.getValueType();
7882 EVT SrcVT = Op1.getValueType();
7884 // If second operand is smaller, extend it first.
7885 if (SrcVT.bitsLT(VT)) {
7886 Op1 = DAG.getNode(ISD::FP_EXTEND, dl, VT, Op1);
7889 // And if it is bigger, shrink it first.
7890 if (SrcVT.bitsGT(VT)) {
7891 Op1 = DAG.getNode(ISD::FP_ROUND, dl, VT, Op1, DAG.getIntPtrConstant(1));
7895 // At this point the operands and the result should have the same
7896 // type, and that won't be f80 since that is not custom lowered.
7898 // First get the sign bit of second operand.
7899 SmallVector<Constant*,4> CV;
7900 if (SrcVT == MVT::f64) {
7901 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, 1ULL << 63))));
7902 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, 0))));
7904 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 1U << 31))));
7905 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7906 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7907 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7909 Constant *C = ConstantVector::get(CV);
7910 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7911 SDValue Mask1 = DAG.getLoad(SrcVT, dl, DAG.getEntryNode(), CPIdx,
7912 MachinePointerInfo::getConstantPool(),
7913 false, false, false, 16);
7914 SDValue SignBit = DAG.getNode(X86ISD::FAND, dl, SrcVT, Op1, Mask1);
7916 // Shift sign bit right or left if the two operands have different types.
7917 if (SrcVT.bitsGT(VT)) {
7918 // Op0 is MVT::f32, Op1 is MVT::f64.
7919 SignBit = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f64, SignBit);
7920 SignBit = DAG.getNode(X86ISD::FSRL, dl, MVT::v2f64, SignBit,
7921 DAG.getConstant(32, MVT::i32));
7922 SignBit = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, SignBit);
7923 SignBit = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, SignBit,
7924 DAG.getIntPtrConstant(0));
7927 // Clear first operand sign bit.
7929 if (VT == MVT::f64) {
7930 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, ~(1ULL << 63)))));
7931 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, 0))));
7933 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, ~(1U << 31)))));
7934 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7935 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7936 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7938 C = ConstantVector::get(CV);
7939 CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7940 SDValue Mask2 = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
7941 MachinePointerInfo::getConstantPool(),
7942 false, false, false, 16);
7943 SDValue Val = DAG.getNode(X86ISD::FAND, dl, VT, Op0, Mask2);
7945 // Or the value with the sign bit.
7946 return DAG.getNode(X86ISD::FOR, dl, VT, Val, SignBit);
7949 SDValue X86TargetLowering::LowerFGETSIGN(SDValue Op, SelectionDAG &DAG) const {
7950 SDValue N0 = Op.getOperand(0);
7951 DebugLoc dl = Op.getDebugLoc();
7952 EVT VT = Op.getValueType();
7954 // Lower ISD::FGETSIGN to (AND (X86ISD::FGETSIGNx86 ...) 1).
7955 SDValue xFGETSIGN = DAG.getNode(X86ISD::FGETSIGNx86, dl, VT, N0,
7956 DAG.getConstant(1, VT));
7957 return DAG.getNode(ISD::AND, dl, VT, xFGETSIGN, DAG.getConstant(1, VT));
7960 /// Emit nodes that will be selected as "test Op0,Op0", or something
7962 SDValue X86TargetLowering::EmitTest(SDValue Op, unsigned X86CC,
7963 SelectionDAG &DAG) const {
7964 DebugLoc dl = Op.getDebugLoc();
7966 // CF and OF aren't always set the way we want. Determine which
7967 // of these we need.
7968 bool NeedCF = false;
7969 bool NeedOF = false;
7972 case X86::COND_A: case X86::COND_AE:
7973 case X86::COND_B: case X86::COND_BE:
7976 case X86::COND_G: case X86::COND_GE:
7977 case X86::COND_L: case X86::COND_LE:
7978 case X86::COND_O: case X86::COND_NO:
7983 // See if we can use the EFLAGS value from the operand instead of
7984 // doing a separate TEST. TEST always sets OF and CF to 0, so unless
7985 // we prove that the arithmetic won't overflow, we can't use OF or CF.
7986 if (Op.getResNo() != 0 || NeedOF || NeedCF)
7987 // Emit a CMP with 0, which is the TEST pattern.
7988 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
7989 DAG.getConstant(0, Op.getValueType()));
7991 unsigned Opcode = 0;
7992 unsigned NumOperands = 0;
7993 switch (Op.getNode()->getOpcode()) {
7995 // Due to an isel shortcoming, be conservative if this add is likely to be
7996 // selected as part of a load-modify-store instruction. When the root node
7997 // in a match is a store, isel doesn't know how to remap non-chain non-flag
7998 // uses of other nodes in the match, such as the ADD in this case. This
7999 // leads to the ADD being left around and reselected, with the result being
8000 // two adds in the output. Alas, even if none our users are stores, that
8001 // doesn't prove we're O.K. Ergo, if we have any parents that aren't
8002 // CopyToReg or SETCC, eschew INC/DEC. A better fix seems to require
8003 // climbing the DAG back to the root, and it doesn't seem to be worth the
8005 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
8006 UE = Op.getNode()->use_end(); UI != UE; ++UI)
8007 if (UI->getOpcode() != ISD::CopyToReg &&
8008 UI->getOpcode() != ISD::SETCC &&
8009 UI->getOpcode() != ISD::STORE)
8012 if (ConstantSDNode *C =
8013 dyn_cast<ConstantSDNode>(Op.getNode()->getOperand(1))) {
8014 // An add of one will be selected as an INC.
8015 if (C->getAPIntValue() == 1) {
8016 Opcode = X86ISD::INC;
8021 // An add of negative one (subtract of one) will be selected as a DEC.
8022 if (C->getAPIntValue().isAllOnesValue()) {
8023 Opcode = X86ISD::DEC;
8029 // Otherwise use a regular EFLAGS-setting add.
8030 Opcode = X86ISD::ADD;
8034 // If the primary and result isn't used, don't bother using X86ISD::AND,
8035 // because a TEST instruction will be better.
8036 bool NonFlagUse = false;
8037 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
8038 UE = Op.getNode()->use_end(); UI != UE; ++UI) {
8040 unsigned UOpNo = UI.getOperandNo();
8041 if (User->getOpcode() == ISD::TRUNCATE && User->hasOneUse()) {
8042 // Look pass truncate.
8043 UOpNo = User->use_begin().getOperandNo();
8044 User = *User->use_begin();
8047 if (User->getOpcode() != ISD::BRCOND &&
8048 User->getOpcode() != ISD::SETCC &&
8049 (User->getOpcode() != ISD::SELECT || UOpNo != 0)) {
8062 // Due to the ISEL shortcoming noted above, be conservative if this op is
8063 // likely to be selected as part of a load-modify-store instruction.
8064 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
8065 UE = Op.getNode()->use_end(); UI != UE; ++UI)
8066 if (UI->getOpcode() == ISD::STORE)
8069 // Otherwise use a regular EFLAGS-setting instruction.
8070 switch (Op.getNode()->getOpcode()) {
8071 default: llvm_unreachable("unexpected operator!");
8072 case ISD::SUB: Opcode = X86ISD::SUB; break;
8073 case ISD::OR: Opcode = X86ISD::OR; break;
8074 case ISD::XOR: Opcode = X86ISD::XOR; break;
8075 case ISD::AND: Opcode = X86ISD::AND; break;
8087 return SDValue(Op.getNode(), 1);
8094 // Emit a CMP with 0, which is the TEST pattern.
8095 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
8096 DAG.getConstant(0, Op.getValueType()));
8098 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32);
8099 SmallVector<SDValue, 4> Ops;
8100 for (unsigned i = 0; i != NumOperands; ++i)
8101 Ops.push_back(Op.getOperand(i));
8103 SDValue New = DAG.getNode(Opcode, dl, VTs, &Ops[0], NumOperands);
8104 DAG.ReplaceAllUsesWith(Op, New);
8105 return SDValue(New.getNode(), 1);
8108 /// Emit nodes that will be selected as "cmp Op0,Op1", or something
8110 SDValue X86TargetLowering::EmitCmp(SDValue Op0, SDValue Op1, unsigned X86CC,
8111 SelectionDAG &DAG) const {
8112 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op1))
8113 if (C->getAPIntValue() == 0)
8114 return EmitTest(Op0, X86CC, DAG);
8116 DebugLoc dl = Op0.getDebugLoc();
8117 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op0, Op1);
8120 /// LowerToBT - Result of 'and' is compared against zero. Turn it into a BT node
8121 /// if it's possible.
8122 SDValue X86TargetLowering::LowerToBT(SDValue And, ISD::CondCode CC,
8123 DebugLoc dl, SelectionDAG &DAG) const {
8124 SDValue Op0 = And.getOperand(0);
8125 SDValue Op1 = And.getOperand(1);
8126 if (Op0.getOpcode() == ISD::TRUNCATE)
8127 Op0 = Op0.getOperand(0);
8128 if (Op1.getOpcode() == ISD::TRUNCATE)
8129 Op1 = Op1.getOperand(0);
8132 if (Op1.getOpcode() == ISD::SHL)
8133 std::swap(Op0, Op1);
8134 if (Op0.getOpcode() == ISD::SHL) {
8135 if (ConstantSDNode *And00C = dyn_cast<ConstantSDNode>(Op0.getOperand(0)))
8136 if (And00C->getZExtValue() == 1) {
8137 // If we looked past a truncate, check that it's only truncating away
8139 unsigned BitWidth = Op0.getValueSizeInBits();
8140 unsigned AndBitWidth = And.getValueSizeInBits();
8141 if (BitWidth > AndBitWidth) {
8142 APInt Mask = APInt::getAllOnesValue(BitWidth), Zeros, Ones;
8143 DAG.ComputeMaskedBits(Op0, Mask, Zeros, Ones);
8144 if (Zeros.countLeadingOnes() < BitWidth - AndBitWidth)
8148 RHS = Op0.getOperand(1);
8150 } else if (Op1.getOpcode() == ISD::Constant) {
8151 ConstantSDNode *AndRHS = cast<ConstantSDNode>(Op1);
8152 uint64_t AndRHSVal = AndRHS->getZExtValue();
8153 SDValue AndLHS = Op0;
8155 if (AndRHSVal == 1 && AndLHS.getOpcode() == ISD::SRL) {
8156 LHS = AndLHS.getOperand(0);
8157 RHS = AndLHS.getOperand(1);
8160 // Use BT if the immediate can't be encoded in a TEST instruction.
8161 if (!isUInt<32>(AndRHSVal) && isPowerOf2_64(AndRHSVal)) {
8163 RHS = DAG.getConstant(Log2_64_Ceil(AndRHSVal), LHS.getValueType());
8167 if (LHS.getNode()) {
8168 // If LHS is i8, promote it to i32 with any_extend. There is no i8 BT
8169 // instruction. Since the shift amount is in-range-or-undefined, we know
8170 // that doing a bittest on the i32 value is ok. We extend to i32 because
8171 // the encoding for the i16 version is larger than the i32 version.
8172 // Also promote i16 to i32 for performance / code size reason.
8173 if (LHS.getValueType() == MVT::i8 ||
8174 LHS.getValueType() == MVT::i16)
8175 LHS = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, LHS);
8177 // If the operand types disagree, extend the shift amount to match. Since
8178 // BT ignores high bits (like shifts) we can use anyextend.
8179 if (LHS.getValueType() != RHS.getValueType())
8180 RHS = DAG.getNode(ISD::ANY_EXTEND, dl, LHS.getValueType(), RHS);
8182 SDValue BT = DAG.getNode(X86ISD::BT, dl, MVT::i32, LHS, RHS);
8183 unsigned Cond = CC == ISD::SETEQ ? X86::COND_AE : X86::COND_B;
8184 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
8185 DAG.getConstant(Cond, MVT::i8), BT);
8191 SDValue X86TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
8193 if (Op.getValueType().isVector()) return LowerVSETCC(Op, DAG);
8195 assert(Op.getValueType() == MVT::i8 && "SetCC type must be 8-bit integer");
8196 SDValue Op0 = Op.getOperand(0);
8197 SDValue Op1 = Op.getOperand(1);
8198 DebugLoc dl = Op.getDebugLoc();
8199 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
8201 // Optimize to BT if possible.
8202 // Lower (X & (1 << N)) == 0 to BT(X, N).
8203 // Lower ((X >>u N) & 1) != 0 to BT(X, N).
8204 // Lower ((X >>s N) & 1) != 0 to BT(X, N).
8205 if (Op0.getOpcode() == ISD::AND && Op0.hasOneUse() &&
8206 Op1.getOpcode() == ISD::Constant &&
8207 cast<ConstantSDNode>(Op1)->isNullValue() &&
8208 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
8209 SDValue NewSetCC = LowerToBT(Op0, CC, dl, DAG);
8210 if (NewSetCC.getNode())
8214 // Look for X == 0, X == 1, X != 0, or X != 1. We can simplify some forms of
8216 if (Op1.getOpcode() == ISD::Constant &&
8217 (cast<ConstantSDNode>(Op1)->getZExtValue() == 1 ||
8218 cast<ConstantSDNode>(Op1)->isNullValue()) &&
8219 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
8221 // If the input is a setcc, then reuse the input setcc or use a new one with
8222 // the inverted condition.
8223 if (Op0.getOpcode() == X86ISD::SETCC) {
8224 X86::CondCode CCode = (X86::CondCode)Op0.getConstantOperandVal(0);
8225 bool Invert = (CC == ISD::SETNE) ^
8226 cast<ConstantSDNode>(Op1)->isNullValue();
8227 if (!Invert) return Op0;
8229 CCode = X86::GetOppositeBranchCondition(CCode);
8230 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
8231 DAG.getConstant(CCode, MVT::i8), Op0.getOperand(1));
8235 bool isFP = Op1.getValueType().isFloatingPoint();
8236 unsigned X86CC = TranslateX86CC(CC, isFP, Op0, Op1, DAG);
8237 if (X86CC == X86::COND_INVALID)
8240 SDValue EFLAGS = EmitCmp(Op0, Op1, X86CC, DAG);
8241 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
8242 DAG.getConstant(X86CC, MVT::i8), EFLAGS);
8245 // Lower256IntVSETCC - Break a VSETCC 256-bit integer VSETCC into two new 128
8246 // ones, and then concatenate the result back.
8247 static SDValue Lower256IntVSETCC(SDValue Op, SelectionDAG &DAG) {
8248 EVT VT = Op.getValueType();
8250 assert(VT.getSizeInBits() == 256 && Op.getOpcode() == ISD::SETCC &&
8251 "Unsupported value type for operation");
8253 int NumElems = VT.getVectorNumElements();
8254 DebugLoc dl = Op.getDebugLoc();
8255 SDValue CC = Op.getOperand(2);
8256 SDValue Idx0 = DAG.getConstant(0, MVT::i32);
8257 SDValue Idx1 = DAG.getConstant(NumElems/2, MVT::i32);
8259 // Extract the LHS vectors
8260 SDValue LHS = Op.getOperand(0);
8261 SDValue LHS1 = Extract128BitVector(LHS, Idx0, DAG, dl);
8262 SDValue LHS2 = Extract128BitVector(LHS, Idx1, DAG, dl);
8264 // Extract the RHS vectors
8265 SDValue RHS = Op.getOperand(1);
8266 SDValue RHS1 = Extract128BitVector(RHS, Idx0, DAG, dl);
8267 SDValue RHS2 = Extract128BitVector(RHS, Idx1, DAG, dl);
8269 // Issue the operation on the smaller types and concatenate the result back
8270 MVT EltVT = VT.getVectorElementType().getSimpleVT();
8271 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
8272 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT,
8273 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, RHS1, CC),
8274 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, RHS2, CC));
8278 SDValue X86TargetLowering::LowerVSETCC(SDValue Op, SelectionDAG &DAG) const {
8280 SDValue Op0 = Op.getOperand(0);
8281 SDValue Op1 = Op.getOperand(1);
8282 SDValue CC = Op.getOperand(2);
8283 EVT VT = Op.getValueType();
8284 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
8285 bool isFP = Op.getOperand(1).getValueType().isFloatingPoint();
8286 DebugLoc dl = Op.getDebugLoc();
8290 EVT EltVT = Op0.getValueType().getVectorElementType();
8291 assert(EltVT == MVT::f32 || EltVT == MVT::f64);
8295 // SSE Condition code mapping:
8304 switch (SetCCOpcode) {
8307 case ISD::SETEQ: SSECC = 0; break;
8309 case ISD::SETGT: Swap = true; // Fallthrough
8311 case ISD::SETOLT: SSECC = 1; break;
8313 case ISD::SETGE: Swap = true; // Fallthrough
8315 case ISD::SETOLE: SSECC = 2; break;
8316 case ISD::SETUO: SSECC = 3; break;
8318 case ISD::SETNE: SSECC = 4; break;
8319 case ISD::SETULE: Swap = true;
8320 case ISD::SETUGE: SSECC = 5; break;
8321 case ISD::SETULT: Swap = true;
8322 case ISD::SETUGT: SSECC = 6; break;
8323 case ISD::SETO: SSECC = 7; break;
8326 std::swap(Op0, Op1);
8328 // In the two special cases we can't handle, emit two comparisons.
8330 if (SetCCOpcode == ISD::SETUEQ) {
8332 UNORD = DAG.getNode(X86ISD::CMPP, dl, VT, Op0, Op1,
8333 DAG.getConstant(3, MVT::i8));
8334 EQ = DAG.getNode(X86ISD::CMPP, dl, VT, Op0, Op1,
8335 DAG.getConstant(0, MVT::i8));
8336 return DAG.getNode(ISD::OR, dl, VT, UNORD, EQ);
8337 } else if (SetCCOpcode == ISD::SETONE) {
8339 ORD = DAG.getNode(X86ISD::CMPP, dl, VT, Op0, Op1,
8340 DAG.getConstant(7, MVT::i8));
8341 NEQ = DAG.getNode(X86ISD::CMPP, dl, VT, Op0, Op1,
8342 DAG.getConstant(4, MVT::i8));
8343 return DAG.getNode(ISD::AND, dl, VT, ORD, NEQ);
8345 llvm_unreachable("Illegal FP comparison");
8347 // Handle all other FP comparisons here.
8348 return DAG.getNode(X86ISD::CMPP, dl, VT, Op0, Op1,
8349 DAG.getConstant(SSECC, MVT::i8));
8352 // Break 256-bit integer vector compare into smaller ones.
8353 if (VT.getSizeInBits() == 256 && !Subtarget->hasAVX2())
8354 return Lower256IntVSETCC(Op, DAG);
8356 // We are handling one of the integer comparisons here. Since SSE only has
8357 // GT and EQ comparisons for integer, swapping operands and multiple
8358 // operations may be required for some comparisons.
8360 bool Swap = false, Invert = false, FlipSigns = false;
8362 switch (SetCCOpcode) {
8364 case ISD::SETNE: Invert = true;
8365 case ISD::SETEQ: Opc = X86ISD::PCMPEQ; break;
8366 case ISD::SETLT: Swap = true;
8367 case ISD::SETGT: Opc = X86ISD::PCMPGT; break;
8368 case ISD::SETGE: Swap = true;
8369 case ISD::SETLE: Opc = X86ISD::PCMPGT; Invert = true; break;
8370 case ISD::SETULT: Swap = true;
8371 case ISD::SETUGT: Opc = X86ISD::PCMPGT; FlipSigns = true; break;
8372 case ISD::SETUGE: Swap = true;
8373 case ISD::SETULE: Opc = X86ISD::PCMPGT; FlipSigns = true; Invert = true; break;
8376 std::swap(Op0, Op1);
8378 // Check that the operation in question is available (most are plain SSE2,
8379 // but PCMPGTQ and PCMPEQQ have different requirements).
8380 if (Opc == X86ISD::PCMPGT && VT == MVT::v2i64 && !Subtarget->hasSSE42())
8382 if (Opc == X86ISD::PCMPEQ && VT == MVT::v2i64 && !Subtarget->hasSSE41())
8385 // Since SSE has no unsigned integer comparisons, we need to flip the sign
8386 // bits of the inputs before performing those operations.
8388 EVT EltVT = VT.getVectorElementType();
8389 SDValue SignBit = DAG.getConstant(APInt::getSignBit(EltVT.getSizeInBits()),
8391 std::vector<SDValue> SignBits(VT.getVectorNumElements(), SignBit);
8392 SDValue SignVec = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &SignBits[0],
8394 Op0 = DAG.getNode(ISD::XOR, dl, VT, Op0, SignVec);
8395 Op1 = DAG.getNode(ISD::XOR, dl, VT, Op1, SignVec);
8398 SDValue Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
8400 // If the logical-not of the result is required, perform that now.
8402 Result = DAG.getNOT(dl, Result, VT);
8407 // isX86LogicalCmp - Return true if opcode is a X86 logical comparison.
8408 static bool isX86LogicalCmp(SDValue Op) {
8409 unsigned Opc = Op.getNode()->getOpcode();
8410 if (Opc == X86ISD::CMP || Opc == X86ISD::COMI || Opc == X86ISD::UCOMI)
8412 if (Op.getResNo() == 1 &&
8413 (Opc == X86ISD::ADD ||
8414 Opc == X86ISD::SUB ||
8415 Opc == X86ISD::ADC ||
8416 Opc == X86ISD::SBB ||
8417 Opc == X86ISD::SMUL ||
8418 Opc == X86ISD::UMUL ||
8419 Opc == X86ISD::INC ||
8420 Opc == X86ISD::DEC ||
8421 Opc == X86ISD::OR ||
8422 Opc == X86ISD::XOR ||
8423 Opc == X86ISD::AND))
8426 if (Op.getResNo() == 2 && Opc == X86ISD::UMUL)
8432 static bool isZero(SDValue V) {
8433 ConstantSDNode *C = dyn_cast<ConstantSDNode>(V);
8434 return C && C->isNullValue();
8437 static bool isAllOnes(SDValue V) {
8438 ConstantSDNode *C = dyn_cast<ConstantSDNode>(V);
8439 return C && C->isAllOnesValue();
8442 SDValue X86TargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
8443 bool addTest = true;
8444 SDValue Cond = Op.getOperand(0);
8445 SDValue Op1 = Op.getOperand(1);
8446 SDValue Op2 = Op.getOperand(2);
8447 DebugLoc DL = Op.getDebugLoc();
8450 if (Cond.getOpcode() == ISD::SETCC) {
8451 SDValue NewCond = LowerSETCC(Cond, DAG);
8452 if (NewCond.getNode())
8456 // (select (x == 0), -1, y) -> (sign_bit (x - 1)) | y
8457 // (select (x == 0), y, -1) -> ~(sign_bit (x - 1)) | y
8458 // (select (x != 0), y, -1) -> (sign_bit (x - 1)) | y
8459 // (select (x != 0), -1, y) -> ~(sign_bit (x - 1)) | y
8460 if (Cond.getOpcode() == X86ISD::SETCC &&
8461 Cond.getOperand(1).getOpcode() == X86ISD::CMP &&
8462 isZero(Cond.getOperand(1).getOperand(1))) {
8463 SDValue Cmp = Cond.getOperand(1);
8465 unsigned CondCode =cast<ConstantSDNode>(Cond.getOperand(0))->getZExtValue();
8467 if ((isAllOnes(Op1) || isAllOnes(Op2)) &&
8468 (CondCode == X86::COND_E || CondCode == X86::COND_NE)) {
8469 SDValue Y = isAllOnes(Op2) ? Op1 : Op2;
8471 SDValue CmpOp0 = Cmp.getOperand(0);
8472 Cmp = DAG.getNode(X86ISD::CMP, DL, MVT::i32,
8473 CmpOp0, DAG.getConstant(1, CmpOp0.getValueType()));
8475 SDValue Res = // Res = 0 or -1.
8476 DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
8477 DAG.getConstant(X86::COND_B, MVT::i8), Cmp);
8479 if (isAllOnes(Op1) != (CondCode == X86::COND_E))
8480 Res = DAG.getNOT(DL, Res, Res.getValueType());
8482 ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(Op2);
8483 if (N2C == 0 || !N2C->isNullValue())
8484 Res = DAG.getNode(ISD::OR, DL, Res.getValueType(), Res, Y);
8489 // Look past (and (setcc_carry (cmp ...)), 1).
8490 if (Cond.getOpcode() == ISD::AND &&
8491 Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) {
8492 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Cond.getOperand(1));
8493 if (C && C->getAPIntValue() == 1)
8494 Cond = Cond.getOperand(0);
8497 // If condition flag is set by a X86ISD::CMP, then use it as the condition
8498 // setting operand in place of the X86ISD::SETCC.
8499 unsigned CondOpcode = Cond.getOpcode();
8500 if (CondOpcode == X86ISD::SETCC ||
8501 CondOpcode == X86ISD::SETCC_CARRY) {
8502 CC = Cond.getOperand(0);
8504 SDValue Cmp = Cond.getOperand(1);
8505 unsigned Opc = Cmp.getOpcode();
8506 EVT VT = Op.getValueType();
8508 bool IllegalFPCMov = false;
8509 if (VT.isFloatingPoint() && !VT.isVector() &&
8510 !isScalarFPTypeInSSEReg(VT)) // FPStack?
8511 IllegalFPCMov = !hasFPCMov(cast<ConstantSDNode>(CC)->getSExtValue());
8513 if ((isX86LogicalCmp(Cmp) && !IllegalFPCMov) ||
8514 Opc == X86ISD::BT) { // FIXME
8518 } else if (CondOpcode == ISD::USUBO || CondOpcode == ISD::SSUBO ||
8519 CondOpcode == ISD::UADDO || CondOpcode == ISD::SADDO ||
8520 ((CondOpcode == ISD::UMULO || CondOpcode == ISD::SMULO) &&
8521 Cond.getOperand(0).getValueType() != MVT::i8)) {
8522 SDValue LHS = Cond.getOperand(0);
8523 SDValue RHS = Cond.getOperand(1);
8527 switch (CondOpcode) {
8528 case ISD::UADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_B; break;
8529 case ISD::SADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_O; break;
8530 case ISD::USUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_B; break;
8531 case ISD::SSUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_O; break;
8532 case ISD::UMULO: X86Opcode = X86ISD::UMUL; X86Cond = X86::COND_O; break;
8533 case ISD::SMULO: X86Opcode = X86ISD::SMUL; X86Cond = X86::COND_O; break;
8534 default: llvm_unreachable("unexpected overflowing operator");
8536 if (CondOpcode == ISD::UMULO)
8537 VTs = DAG.getVTList(LHS.getValueType(), LHS.getValueType(),
8540 VTs = DAG.getVTList(LHS.getValueType(), MVT::i32);
8542 SDValue X86Op = DAG.getNode(X86Opcode, DL, VTs, LHS, RHS);
8544 if (CondOpcode == ISD::UMULO)
8545 Cond = X86Op.getValue(2);
8547 Cond = X86Op.getValue(1);
8549 CC = DAG.getConstant(X86Cond, MVT::i8);
8554 // Look pass the truncate.
8555 if (Cond.getOpcode() == ISD::TRUNCATE)
8556 Cond = Cond.getOperand(0);
8558 // We know the result of AND is compared against zero. Try to match
8560 if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) {
8561 SDValue NewSetCC = LowerToBT(Cond, ISD::SETNE, DL, DAG);
8562 if (NewSetCC.getNode()) {
8563 CC = NewSetCC.getOperand(0);
8564 Cond = NewSetCC.getOperand(1);
8571 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
8572 Cond = EmitTest(Cond, X86::COND_NE, DAG);
8575 // a < b ? -1 : 0 -> RES = ~setcc_carry
8576 // a < b ? 0 : -1 -> RES = setcc_carry
8577 // a >= b ? -1 : 0 -> RES = setcc_carry
8578 // a >= b ? 0 : -1 -> RES = ~setcc_carry
8579 if (Cond.getOpcode() == X86ISD::CMP) {
8580 unsigned CondCode = cast<ConstantSDNode>(CC)->getZExtValue();
8582 if ((CondCode == X86::COND_AE || CondCode == X86::COND_B) &&
8583 (isAllOnes(Op1) || isAllOnes(Op2)) && (isZero(Op1) || isZero(Op2))) {
8584 SDValue Res = DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
8585 DAG.getConstant(X86::COND_B, MVT::i8), Cond);
8586 if (isAllOnes(Op1) != (CondCode == X86::COND_B))
8587 return DAG.getNOT(DL, Res, Res.getValueType());
8592 // X86ISD::CMOV means set the result (which is operand 1) to the RHS if
8593 // condition is true.
8594 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::Glue);
8595 SDValue Ops[] = { Op2, Op1, CC, Cond };
8596 return DAG.getNode(X86ISD::CMOV, DL, VTs, Ops, array_lengthof(Ops));
8599 // isAndOrOfSingleUseSetCCs - Return true if node is an ISD::AND or
8600 // ISD::OR of two X86ISD::SETCC nodes each of which has no other use apart
8601 // from the AND / OR.
8602 static bool isAndOrOfSetCCs(SDValue Op, unsigned &Opc) {
8603 Opc = Op.getOpcode();
8604 if (Opc != ISD::OR && Opc != ISD::AND)
8606 return (Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
8607 Op.getOperand(0).hasOneUse() &&
8608 Op.getOperand(1).getOpcode() == X86ISD::SETCC &&
8609 Op.getOperand(1).hasOneUse());
8612 // isXor1OfSetCC - Return true if node is an ISD::XOR of a X86ISD::SETCC and
8613 // 1 and that the SETCC node has a single use.
8614 static bool isXor1OfSetCC(SDValue Op) {
8615 if (Op.getOpcode() != ISD::XOR)
8617 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(Op.getOperand(1));
8618 if (N1C && N1C->getAPIntValue() == 1) {
8619 return Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
8620 Op.getOperand(0).hasOneUse();
8625 SDValue X86TargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) const {
8626 bool addTest = true;
8627 SDValue Chain = Op.getOperand(0);
8628 SDValue Cond = Op.getOperand(1);
8629 SDValue Dest = Op.getOperand(2);
8630 DebugLoc dl = Op.getDebugLoc();
8632 bool Inverted = false;
8634 if (Cond.getOpcode() == ISD::SETCC) {
8635 // Check for setcc([su]{add,sub,mul}o == 0).
8636 if (cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETEQ &&
8637 isa<ConstantSDNode>(Cond.getOperand(1)) &&
8638 cast<ConstantSDNode>(Cond.getOperand(1))->isNullValue() &&
8639 Cond.getOperand(0).getResNo() == 1 &&
8640 (Cond.getOperand(0).getOpcode() == ISD::SADDO ||
8641 Cond.getOperand(0).getOpcode() == ISD::UADDO ||
8642 Cond.getOperand(0).getOpcode() == ISD::SSUBO ||
8643 Cond.getOperand(0).getOpcode() == ISD::USUBO ||
8644 Cond.getOperand(0).getOpcode() == ISD::SMULO ||
8645 Cond.getOperand(0).getOpcode() == ISD::UMULO)) {
8647 Cond = Cond.getOperand(0);
8649 SDValue NewCond = LowerSETCC(Cond, DAG);
8650 if (NewCond.getNode())
8655 // FIXME: LowerXALUO doesn't handle these!!
8656 else if (Cond.getOpcode() == X86ISD::ADD ||
8657 Cond.getOpcode() == X86ISD::SUB ||
8658 Cond.getOpcode() == X86ISD::SMUL ||
8659 Cond.getOpcode() == X86ISD::UMUL)
8660 Cond = LowerXALUO(Cond, DAG);
8663 // Look pass (and (setcc_carry (cmp ...)), 1).
8664 if (Cond.getOpcode() == ISD::AND &&
8665 Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) {
8666 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Cond.getOperand(1));
8667 if (C && C->getAPIntValue() == 1)
8668 Cond = Cond.getOperand(0);
8671 // If condition flag is set by a X86ISD::CMP, then use it as the condition
8672 // setting operand in place of the X86ISD::SETCC.
8673 unsigned CondOpcode = Cond.getOpcode();
8674 if (CondOpcode == X86ISD::SETCC ||
8675 CondOpcode == X86ISD::SETCC_CARRY) {
8676 CC = Cond.getOperand(0);
8678 SDValue Cmp = Cond.getOperand(1);
8679 unsigned Opc = Cmp.getOpcode();
8680 // FIXME: WHY THE SPECIAL CASING OF LogicalCmp??
8681 if (isX86LogicalCmp(Cmp) || Opc == X86ISD::BT) {
8685 switch (cast<ConstantSDNode>(CC)->getZExtValue()) {
8689 // These can only come from an arithmetic instruction with overflow,
8690 // e.g. SADDO, UADDO.
8691 Cond = Cond.getNode()->getOperand(1);
8697 CondOpcode = Cond.getOpcode();
8698 if (CondOpcode == ISD::UADDO || CondOpcode == ISD::SADDO ||
8699 CondOpcode == ISD::USUBO || CondOpcode == ISD::SSUBO ||
8700 ((CondOpcode == ISD::UMULO || CondOpcode == ISD::SMULO) &&
8701 Cond.getOperand(0).getValueType() != MVT::i8)) {
8702 SDValue LHS = Cond.getOperand(0);
8703 SDValue RHS = Cond.getOperand(1);
8707 switch (CondOpcode) {
8708 case ISD::UADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_B; break;
8709 case ISD::SADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_O; break;
8710 case ISD::USUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_B; break;
8711 case ISD::SSUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_O; break;
8712 case ISD::UMULO: X86Opcode = X86ISD::UMUL; X86Cond = X86::COND_O; break;
8713 case ISD::SMULO: X86Opcode = X86ISD::SMUL; X86Cond = X86::COND_O; break;
8714 default: llvm_unreachable("unexpected overflowing operator");
8717 X86Cond = X86::GetOppositeBranchCondition((X86::CondCode)X86Cond);
8718 if (CondOpcode == ISD::UMULO)
8719 VTs = DAG.getVTList(LHS.getValueType(), LHS.getValueType(),
8722 VTs = DAG.getVTList(LHS.getValueType(), MVT::i32);
8724 SDValue X86Op = DAG.getNode(X86Opcode, dl, VTs, LHS, RHS);
8726 if (CondOpcode == ISD::UMULO)
8727 Cond = X86Op.getValue(2);
8729 Cond = X86Op.getValue(1);
8731 CC = DAG.getConstant(X86Cond, MVT::i8);
8735 if (Cond.hasOneUse() && isAndOrOfSetCCs(Cond, CondOpc)) {
8736 SDValue Cmp = Cond.getOperand(0).getOperand(1);
8737 if (CondOpc == ISD::OR) {
8738 // Also, recognize the pattern generated by an FCMP_UNE. We can emit
8739 // two branches instead of an explicit OR instruction with a
8741 if (Cmp == Cond.getOperand(1).getOperand(1) &&
8742 isX86LogicalCmp(Cmp)) {
8743 CC = Cond.getOperand(0).getOperand(0);
8744 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
8745 Chain, Dest, CC, Cmp);
8746 CC = Cond.getOperand(1).getOperand(0);
8750 } else { // ISD::AND
8751 // Also, recognize the pattern generated by an FCMP_OEQ. We can emit
8752 // two branches instead of an explicit AND instruction with a
8753 // separate test. However, we only do this if this block doesn't
8754 // have a fall-through edge, because this requires an explicit
8755 // jmp when the condition is false.
8756 if (Cmp == Cond.getOperand(1).getOperand(1) &&
8757 isX86LogicalCmp(Cmp) &&
8758 Op.getNode()->hasOneUse()) {
8759 X86::CondCode CCode =
8760 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
8761 CCode = X86::GetOppositeBranchCondition(CCode);
8762 CC = DAG.getConstant(CCode, MVT::i8);
8763 SDNode *User = *Op.getNode()->use_begin();
8764 // Look for an unconditional branch following this conditional branch.
8765 // We need this because we need to reverse the successors in order
8766 // to implement FCMP_OEQ.
8767 if (User->getOpcode() == ISD::BR) {
8768 SDValue FalseBB = User->getOperand(1);
8770 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
8771 assert(NewBR == User);
8775 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
8776 Chain, Dest, CC, Cmp);
8777 X86::CondCode CCode =
8778 (X86::CondCode)Cond.getOperand(1).getConstantOperandVal(0);
8779 CCode = X86::GetOppositeBranchCondition(CCode);
8780 CC = DAG.getConstant(CCode, MVT::i8);
8786 } else if (Cond.hasOneUse() && isXor1OfSetCC(Cond)) {
8787 // Recognize for xorb (setcc), 1 patterns. The xor inverts the condition.
8788 // It should be transformed during dag combiner except when the condition
8789 // is set by a arithmetics with overflow node.
8790 X86::CondCode CCode =
8791 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
8792 CCode = X86::GetOppositeBranchCondition(CCode);
8793 CC = DAG.getConstant(CCode, MVT::i8);
8794 Cond = Cond.getOperand(0).getOperand(1);
8796 } else if (Cond.getOpcode() == ISD::SETCC &&
8797 cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETOEQ) {
8798 // For FCMP_OEQ, we can emit
8799 // two branches instead of an explicit AND instruction with a
8800 // separate test. However, we only do this if this block doesn't
8801 // have a fall-through edge, because this requires an explicit
8802 // jmp when the condition is false.
8803 if (Op.getNode()->hasOneUse()) {
8804 SDNode *User = *Op.getNode()->use_begin();
8805 // Look for an unconditional branch following this conditional branch.
8806 // We need this because we need to reverse the successors in order
8807 // to implement FCMP_OEQ.
8808 if (User->getOpcode() == ISD::BR) {
8809 SDValue FalseBB = User->getOperand(1);
8811 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
8812 assert(NewBR == User);
8816 SDValue Cmp = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
8817 Cond.getOperand(0), Cond.getOperand(1));
8818 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
8819 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
8820 Chain, Dest, CC, Cmp);
8821 CC = DAG.getConstant(X86::COND_P, MVT::i8);
8826 } else if (Cond.getOpcode() == ISD::SETCC &&
8827 cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETUNE) {
8828 // For FCMP_UNE, we can emit
8829 // two branches instead of an explicit AND instruction with a
8830 // separate test. However, we only do this if this block doesn't
8831 // have a fall-through edge, because this requires an explicit
8832 // jmp when the condition is false.
8833 if (Op.getNode()->hasOneUse()) {
8834 SDNode *User = *Op.getNode()->use_begin();
8835 // Look for an unconditional branch following this conditional branch.
8836 // We need this because we need to reverse the successors in order
8837 // to implement FCMP_UNE.
8838 if (User->getOpcode() == ISD::BR) {
8839 SDValue FalseBB = User->getOperand(1);
8841 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
8842 assert(NewBR == User);
8845 SDValue Cmp = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
8846 Cond.getOperand(0), Cond.getOperand(1));
8847 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
8848 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
8849 Chain, Dest, CC, Cmp);
8850 CC = DAG.getConstant(X86::COND_NP, MVT::i8);
8860 // Look pass the truncate.
8861 if (Cond.getOpcode() == ISD::TRUNCATE)
8862 Cond = Cond.getOperand(0);
8864 // We know the result of AND is compared against zero. Try to match
8866 if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) {
8867 SDValue NewSetCC = LowerToBT(Cond, ISD::SETNE, dl, DAG);
8868 if (NewSetCC.getNode()) {
8869 CC = NewSetCC.getOperand(0);
8870 Cond = NewSetCC.getOperand(1);
8877 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
8878 Cond = EmitTest(Cond, X86::COND_NE, DAG);
8880 return DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
8881 Chain, Dest, CC, Cond);
8885 // Lower dynamic stack allocation to _alloca call for Cygwin/Mingw targets.
8886 // Calls to _alloca is needed to probe the stack when allocating more than 4k
8887 // bytes in one go. Touching the stack at 4K increments is necessary to ensure
8888 // that the guard pages used by the OS virtual memory manager are allocated in
8889 // correct sequence.
8891 X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
8892 SelectionDAG &DAG) const {
8893 assert((Subtarget->isTargetCygMing() || Subtarget->isTargetWindows() ||
8894 getTargetMachine().Options.EnableSegmentedStacks) &&
8895 "This should be used only on Windows targets or when segmented stacks "
8897 assert(!Subtarget->isTargetEnvMacho() && "Not implemented");
8898 DebugLoc dl = Op.getDebugLoc();
8901 SDValue Chain = Op.getOperand(0);
8902 SDValue Size = Op.getOperand(1);
8903 // FIXME: Ensure alignment here
8905 bool Is64Bit = Subtarget->is64Bit();
8906 EVT SPTy = Is64Bit ? MVT::i64 : MVT::i32;
8908 if (getTargetMachine().Options.EnableSegmentedStacks) {
8909 MachineFunction &MF = DAG.getMachineFunction();
8910 MachineRegisterInfo &MRI = MF.getRegInfo();
8913 // The 64 bit implementation of segmented stacks needs to clobber both r10
8914 // r11. This makes it impossible to use it along with nested parameters.
8915 const Function *F = MF.getFunction();
8917 for (Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
8919 if (I->hasNestAttr())
8920 report_fatal_error("Cannot use segmented stacks with functions that "
8921 "have nested arguments.");
8924 const TargetRegisterClass *AddrRegClass =
8925 getRegClassFor(Subtarget->is64Bit() ? MVT::i64:MVT::i32);
8926 unsigned Vreg = MRI.createVirtualRegister(AddrRegClass);
8927 Chain = DAG.getCopyToReg(Chain, dl, Vreg, Size);
8928 SDValue Value = DAG.getNode(X86ISD::SEG_ALLOCA, dl, SPTy, Chain,
8929 DAG.getRegister(Vreg, SPTy));
8930 SDValue Ops1[2] = { Value, Chain };
8931 return DAG.getMergeValues(Ops1, 2, dl);
8934 unsigned Reg = (Subtarget->is64Bit() ? X86::RAX : X86::EAX);
8936 Chain = DAG.getCopyToReg(Chain, dl, Reg, Size, Flag);
8937 Flag = Chain.getValue(1);
8938 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
8940 Chain = DAG.getNode(X86ISD::WIN_ALLOCA, dl, NodeTys, Chain, Flag);
8941 Flag = Chain.getValue(1);
8943 Chain = DAG.getCopyFromReg(Chain, dl, X86StackPtr, SPTy).getValue(1);
8945 SDValue Ops1[2] = { Chain.getValue(0), Chain };
8946 return DAG.getMergeValues(Ops1, 2, dl);
8950 SDValue X86TargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const {
8951 MachineFunction &MF = DAG.getMachineFunction();
8952 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
8954 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
8955 DebugLoc DL = Op.getDebugLoc();
8957 if (!Subtarget->is64Bit() || Subtarget->isTargetWin64()) {
8958 // vastart just stores the address of the VarArgsFrameIndex slot into the
8959 // memory location argument.
8960 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
8962 return DAG.getStore(Op.getOperand(0), DL, FR, Op.getOperand(1),
8963 MachinePointerInfo(SV), false, false, 0);
8967 // gp_offset (0 - 6 * 8)
8968 // fp_offset (48 - 48 + 8 * 16)
8969 // overflow_arg_area (point to parameters coming in memory).
8971 SmallVector<SDValue, 8> MemOps;
8972 SDValue FIN = Op.getOperand(1);
8974 SDValue Store = DAG.getStore(Op.getOperand(0), DL,
8975 DAG.getConstant(FuncInfo->getVarArgsGPOffset(),
8977 FIN, MachinePointerInfo(SV), false, false, 0);
8978 MemOps.push_back(Store);
8981 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
8982 FIN, DAG.getIntPtrConstant(4));
8983 Store = DAG.getStore(Op.getOperand(0), DL,
8984 DAG.getConstant(FuncInfo->getVarArgsFPOffset(),
8986 FIN, MachinePointerInfo(SV, 4), false, false, 0);
8987 MemOps.push_back(Store);
8989 // Store ptr to overflow_arg_area
8990 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
8991 FIN, DAG.getIntPtrConstant(4));
8992 SDValue OVFIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
8994 Store = DAG.getStore(Op.getOperand(0), DL, OVFIN, FIN,
8995 MachinePointerInfo(SV, 8),
8997 MemOps.push_back(Store);
8999 // Store ptr to reg_save_area.
9000 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
9001 FIN, DAG.getIntPtrConstant(8));
9002 SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(),
9004 Store = DAG.getStore(Op.getOperand(0), DL, RSFIN, FIN,
9005 MachinePointerInfo(SV, 16), false, false, 0);
9006 MemOps.push_back(Store);
9007 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
9008 &MemOps[0], MemOps.size());
9011 SDValue X86TargetLowering::LowerVAARG(SDValue Op, SelectionDAG &DAG) const {
9012 assert(Subtarget->is64Bit() &&
9013 "LowerVAARG only handles 64-bit va_arg!");
9014 assert((Subtarget->isTargetLinux() ||
9015 Subtarget->isTargetDarwin()) &&
9016 "Unhandled target in LowerVAARG");
9017 assert(Op.getNode()->getNumOperands() == 4);
9018 SDValue Chain = Op.getOperand(0);
9019 SDValue SrcPtr = Op.getOperand(1);
9020 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
9021 unsigned Align = Op.getConstantOperandVal(3);
9022 DebugLoc dl = Op.getDebugLoc();
9024 EVT ArgVT = Op.getNode()->getValueType(0);
9025 Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
9026 uint32_t ArgSize = getTargetData()->getTypeAllocSize(ArgTy);
9029 // Decide which area this value should be read from.
9030 // TODO: Implement the AMD64 ABI in its entirety. This simple
9031 // selection mechanism works only for the basic types.
9032 if (ArgVT == MVT::f80) {
9033 llvm_unreachable("va_arg for f80 not yet implemented");
9034 } else if (ArgVT.isFloatingPoint() && ArgSize <= 16 /*bytes*/) {
9035 ArgMode = 2; // Argument passed in XMM register. Use fp_offset.
9036 } else if (ArgVT.isInteger() && ArgSize <= 32 /*bytes*/) {
9037 ArgMode = 1; // Argument passed in GPR64 register(s). Use gp_offset.
9039 llvm_unreachable("Unhandled argument type in LowerVAARG");
9043 // Sanity Check: Make sure using fp_offset makes sense.
9044 assert(!getTargetMachine().Options.UseSoftFloat &&
9045 !(DAG.getMachineFunction()
9046 .getFunction()->hasFnAttr(Attribute::NoImplicitFloat)) &&
9047 Subtarget->hasSSE1());
9050 // Insert VAARG_64 node into the DAG
9051 // VAARG_64 returns two values: Variable Argument Address, Chain
9052 SmallVector<SDValue, 11> InstOps;
9053 InstOps.push_back(Chain);
9054 InstOps.push_back(SrcPtr);
9055 InstOps.push_back(DAG.getConstant(ArgSize, MVT::i32));
9056 InstOps.push_back(DAG.getConstant(ArgMode, MVT::i8));
9057 InstOps.push_back(DAG.getConstant(Align, MVT::i32));
9058 SDVTList VTs = DAG.getVTList(getPointerTy(), MVT::Other);
9059 SDValue VAARG = DAG.getMemIntrinsicNode(X86ISD::VAARG_64, dl,
9060 VTs, &InstOps[0], InstOps.size(),
9062 MachinePointerInfo(SV),
9067 Chain = VAARG.getValue(1);
9069 // Load the next argument and return it
9070 return DAG.getLoad(ArgVT, dl,
9073 MachinePointerInfo(),
9074 false, false, false, 0);
9077 SDValue X86TargetLowering::LowerVACOPY(SDValue Op, SelectionDAG &DAG) const {
9078 // X86-64 va_list is a struct { i32, i32, i8*, i8* }.
9079 assert(Subtarget->is64Bit() && "This code only handles 64-bit va_copy!");
9080 SDValue Chain = Op.getOperand(0);
9081 SDValue DstPtr = Op.getOperand(1);
9082 SDValue SrcPtr = Op.getOperand(2);
9083 const Value *DstSV = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
9084 const Value *SrcSV = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
9085 DebugLoc DL = Op.getDebugLoc();
9087 return DAG.getMemcpy(Chain, DL, DstPtr, SrcPtr,
9088 DAG.getIntPtrConstant(24), 8, /*isVolatile*/false,
9090 MachinePointerInfo(DstSV), MachinePointerInfo(SrcSV));
9093 // getTargetVShiftNOde - Handle vector element shifts where the shift amount
9094 // may or may not be a constant. Takes immediate version of shift as input.
9095 static SDValue getTargetVShiftNode(unsigned Opc, DebugLoc dl, EVT VT,
9096 SDValue SrcOp, SDValue ShAmt,
9097 SelectionDAG &DAG) {
9098 assert(ShAmt.getValueType() == MVT::i32 && "ShAmt is not i32");
9100 if (isa<ConstantSDNode>(ShAmt)) {
9102 default: llvm_unreachable("Unknown target vector shift node");
9106 return DAG.getNode(Opc, dl, VT, SrcOp, ShAmt);
9110 // Change opcode to non-immediate version
9112 default: llvm_unreachable("Unknown target vector shift node");
9113 case X86ISD::VSHLI: Opc = X86ISD::VSHL; break;
9114 case X86ISD::VSRLI: Opc = X86ISD::VSRL; break;
9115 case X86ISD::VSRAI: Opc = X86ISD::VSRA; break;
9118 // Need to build a vector containing shift amount
9119 // Shift amount is 32-bits, but SSE instructions read 64-bit, so fill with 0
9122 ShOps[1] = DAG.getConstant(0, MVT::i32);
9123 ShOps[2] = DAG.getUNDEF(MVT::i32);
9124 ShOps[3] = DAG.getUNDEF(MVT::i32);
9125 ShAmt = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, &ShOps[0], 4);
9126 ShAmt = DAG.getNode(ISD::BITCAST, dl, VT, ShAmt);
9127 return DAG.getNode(Opc, dl, VT, SrcOp, ShAmt);
9131 X86TargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const {
9132 DebugLoc dl = Op.getDebugLoc();
9133 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
9135 default: return SDValue(); // Don't custom lower most intrinsics.
9136 // Comparison intrinsics.
9137 case Intrinsic::x86_sse_comieq_ss:
9138 case Intrinsic::x86_sse_comilt_ss:
9139 case Intrinsic::x86_sse_comile_ss:
9140 case Intrinsic::x86_sse_comigt_ss:
9141 case Intrinsic::x86_sse_comige_ss:
9142 case Intrinsic::x86_sse_comineq_ss:
9143 case Intrinsic::x86_sse_ucomieq_ss:
9144 case Intrinsic::x86_sse_ucomilt_ss:
9145 case Intrinsic::x86_sse_ucomile_ss:
9146 case Intrinsic::x86_sse_ucomigt_ss:
9147 case Intrinsic::x86_sse_ucomige_ss:
9148 case Intrinsic::x86_sse_ucomineq_ss:
9149 case Intrinsic::x86_sse2_comieq_sd:
9150 case Intrinsic::x86_sse2_comilt_sd:
9151 case Intrinsic::x86_sse2_comile_sd:
9152 case Intrinsic::x86_sse2_comigt_sd:
9153 case Intrinsic::x86_sse2_comige_sd:
9154 case Intrinsic::x86_sse2_comineq_sd:
9155 case Intrinsic::x86_sse2_ucomieq_sd:
9156 case Intrinsic::x86_sse2_ucomilt_sd:
9157 case Intrinsic::x86_sse2_ucomile_sd:
9158 case Intrinsic::x86_sse2_ucomigt_sd:
9159 case Intrinsic::x86_sse2_ucomige_sd:
9160 case Intrinsic::x86_sse2_ucomineq_sd: {
9162 ISD::CondCode CC = ISD::SETCC_INVALID;
9164 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
9165 case Intrinsic::x86_sse_comieq_ss:
9166 case Intrinsic::x86_sse2_comieq_sd:
9170 case Intrinsic::x86_sse_comilt_ss:
9171 case Intrinsic::x86_sse2_comilt_sd:
9175 case Intrinsic::x86_sse_comile_ss:
9176 case Intrinsic::x86_sse2_comile_sd:
9180 case Intrinsic::x86_sse_comigt_ss:
9181 case Intrinsic::x86_sse2_comigt_sd:
9185 case Intrinsic::x86_sse_comige_ss:
9186 case Intrinsic::x86_sse2_comige_sd:
9190 case Intrinsic::x86_sse_comineq_ss:
9191 case Intrinsic::x86_sse2_comineq_sd:
9195 case Intrinsic::x86_sse_ucomieq_ss:
9196 case Intrinsic::x86_sse2_ucomieq_sd:
9197 Opc = X86ISD::UCOMI;
9200 case Intrinsic::x86_sse_ucomilt_ss:
9201 case Intrinsic::x86_sse2_ucomilt_sd:
9202 Opc = X86ISD::UCOMI;
9205 case Intrinsic::x86_sse_ucomile_ss:
9206 case Intrinsic::x86_sse2_ucomile_sd:
9207 Opc = X86ISD::UCOMI;
9210 case Intrinsic::x86_sse_ucomigt_ss:
9211 case Intrinsic::x86_sse2_ucomigt_sd:
9212 Opc = X86ISD::UCOMI;
9215 case Intrinsic::x86_sse_ucomige_ss:
9216 case Intrinsic::x86_sse2_ucomige_sd:
9217 Opc = X86ISD::UCOMI;
9220 case Intrinsic::x86_sse_ucomineq_ss:
9221 case Intrinsic::x86_sse2_ucomineq_sd:
9222 Opc = X86ISD::UCOMI;
9227 SDValue LHS = Op.getOperand(1);
9228 SDValue RHS = Op.getOperand(2);
9229 unsigned X86CC = TranslateX86CC(CC, true, LHS, RHS, DAG);
9230 assert(X86CC != X86::COND_INVALID && "Unexpected illegal condition!");
9231 SDValue Cond = DAG.getNode(Opc, dl, MVT::i32, LHS, RHS);
9232 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
9233 DAG.getConstant(X86CC, MVT::i8), Cond);
9234 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
9236 // XOP comparison intrinsics
9237 case Intrinsic::x86_xop_vpcomltb:
9238 case Intrinsic::x86_xop_vpcomltw:
9239 case Intrinsic::x86_xop_vpcomltd:
9240 case Intrinsic::x86_xop_vpcomltq:
9241 case Intrinsic::x86_xop_vpcomltub:
9242 case Intrinsic::x86_xop_vpcomltuw:
9243 case Intrinsic::x86_xop_vpcomltud:
9244 case Intrinsic::x86_xop_vpcomltuq:
9245 case Intrinsic::x86_xop_vpcomleb:
9246 case Intrinsic::x86_xop_vpcomlew:
9247 case Intrinsic::x86_xop_vpcomled:
9248 case Intrinsic::x86_xop_vpcomleq:
9249 case Intrinsic::x86_xop_vpcomleub:
9250 case Intrinsic::x86_xop_vpcomleuw:
9251 case Intrinsic::x86_xop_vpcomleud:
9252 case Intrinsic::x86_xop_vpcomleuq:
9253 case Intrinsic::x86_xop_vpcomgtb:
9254 case Intrinsic::x86_xop_vpcomgtw:
9255 case Intrinsic::x86_xop_vpcomgtd:
9256 case Intrinsic::x86_xop_vpcomgtq:
9257 case Intrinsic::x86_xop_vpcomgtub:
9258 case Intrinsic::x86_xop_vpcomgtuw:
9259 case Intrinsic::x86_xop_vpcomgtud:
9260 case Intrinsic::x86_xop_vpcomgtuq:
9261 case Intrinsic::x86_xop_vpcomgeb:
9262 case Intrinsic::x86_xop_vpcomgew:
9263 case Intrinsic::x86_xop_vpcomged:
9264 case Intrinsic::x86_xop_vpcomgeq:
9265 case Intrinsic::x86_xop_vpcomgeub:
9266 case Intrinsic::x86_xop_vpcomgeuw:
9267 case Intrinsic::x86_xop_vpcomgeud:
9268 case Intrinsic::x86_xop_vpcomgeuq:
9269 case Intrinsic::x86_xop_vpcomeqb:
9270 case Intrinsic::x86_xop_vpcomeqw:
9271 case Intrinsic::x86_xop_vpcomeqd:
9272 case Intrinsic::x86_xop_vpcomeqq:
9273 case Intrinsic::x86_xop_vpcomequb:
9274 case Intrinsic::x86_xop_vpcomequw:
9275 case Intrinsic::x86_xop_vpcomequd:
9276 case Intrinsic::x86_xop_vpcomequq:
9277 case Intrinsic::x86_xop_vpcomneb:
9278 case Intrinsic::x86_xop_vpcomnew:
9279 case Intrinsic::x86_xop_vpcomned:
9280 case Intrinsic::x86_xop_vpcomneq:
9281 case Intrinsic::x86_xop_vpcomneub:
9282 case Intrinsic::x86_xop_vpcomneuw:
9283 case Intrinsic::x86_xop_vpcomneud:
9284 case Intrinsic::x86_xop_vpcomneuq:
9285 case Intrinsic::x86_xop_vpcomfalseb:
9286 case Intrinsic::x86_xop_vpcomfalsew:
9287 case Intrinsic::x86_xop_vpcomfalsed:
9288 case Intrinsic::x86_xop_vpcomfalseq:
9289 case Intrinsic::x86_xop_vpcomfalseub:
9290 case Intrinsic::x86_xop_vpcomfalseuw:
9291 case Intrinsic::x86_xop_vpcomfalseud:
9292 case Intrinsic::x86_xop_vpcomfalseuq:
9293 case Intrinsic::x86_xop_vpcomtrueb:
9294 case Intrinsic::x86_xop_vpcomtruew:
9295 case Intrinsic::x86_xop_vpcomtrued:
9296 case Intrinsic::x86_xop_vpcomtrueq:
9297 case Intrinsic::x86_xop_vpcomtrueub:
9298 case Intrinsic::x86_xop_vpcomtrueuw:
9299 case Intrinsic::x86_xop_vpcomtrueud:
9300 case Intrinsic::x86_xop_vpcomtrueuq: {
9305 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
9306 case Intrinsic::x86_xop_vpcomltb:
9307 case Intrinsic::x86_xop_vpcomltw:
9308 case Intrinsic::x86_xop_vpcomltd:
9309 case Intrinsic::x86_xop_vpcomltq:
9311 Opc = X86ISD::VPCOM;
9313 case Intrinsic::x86_xop_vpcomltub:
9314 case Intrinsic::x86_xop_vpcomltuw:
9315 case Intrinsic::x86_xop_vpcomltud:
9316 case Intrinsic::x86_xop_vpcomltuq:
9318 Opc = X86ISD::VPCOMU;
9320 case Intrinsic::x86_xop_vpcomleb:
9321 case Intrinsic::x86_xop_vpcomlew:
9322 case Intrinsic::x86_xop_vpcomled:
9323 case Intrinsic::x86_xop_vpcomleq:
9325 Opc = X86ISD::VPCOM;
9327 case Intrinsic::x86_xop_vpcomleub:
9328 case Intrinsic::x86_xop_vpcomleuw:
9329 case Intrinsic::x86_xop_vpcomleud:
9330 case Intrinsic::x86_xop_vpcomleuq:
9332 Opc = X86ISD::VPCOMU;
9334 case Intrinsic::x86_xop_vpcomgtb:
9335 case Intrinsic::x86_xop_vpcomgtw:
9336 case Intrinsic::x86_xop_vpcomgtd:
9337 case Intrinsic::x86_xop_vpcomgtq:
9339 Opc = X86ISD::VPCOM;
9341 case Intrinsic::x86_xop_vpcomgtub:
9342 case Intrinsic::x86_xop_vpcomgtuw:
9343 case Intrinsic::x86_xop_vpcomgtud:
9344 case Intrinsic::x86_xop_vpcomgtuq:
9346 Opc = X86ISD::VPCOMU;
9348 case Intrinsic::x86_xop_vpcomgeb:
9349 case Intrinsic::x86_xop_vpcomgew:
9350 case Intrinsic::x86_xop_vpcomged:
9351 case Intrinsic::x86_xop_vpcomgeq:
9353 Opc = X86ISD::VPCOM;
9355 case Intrinsic::x86_xop_vpcomgeub:
9356 case Intrinsic::x86_xop_vpcomgeuw:
9357 case Intrinsic::x86_xop_vpcomgeud:
9358 case Intrinsic::x86_xop_vpcomgeuq:
9360 Opc = X86ISD::VPCOMU;
9362 case Intrinsic::x86_xop_vpcomeqb:
9363 case Intrinsic::x86_xop_vpcomeqw:
9364 case Intrinsic::x86_xop_vpcomeqd:
9365 case Intrinsic::x86_xop_vpcomeqq:
9367 Opc = X86ISD::VPCOM;
9369 case Intrinsic::x86_xop_vpcomequb:
9370 case Intrinsic::x86_xop_vpcomequw:
9371 case Intrinsic::x86_xop_vpcomequd:
9372 case Intrinsic::x86_xop_vpcomequq:
9374 Opc = X86ISD::VPCOMU;
9376 case Intrinsic::x86_xop_vpcomneb:
9377 case Intrinsic::x86_xop_vpcomnew:
9378 case Intrinsic::x86_xop_vpcomned:
9379 case Intrinsic::x86_xop_vpcomneq:
9381 Opc = X86ISD::VPCOM;
9383 case Intrinsic::x86_xop_vpcomneub:
9384 case Intrinsic::x86_xop_vpcomneuw:
9385 case Intrinsic::x86_xop_vpcomneud:
9386 case Intrinsic::x86_xop_vpcomneuq:
9388 Opc = X86ISD::VPCOMU;
9390 case Intrinsic::x86_xop_vpcomfalseb:
9391 case Intrinsic::x86_xop_vpcomfalsew:
9392 case Intrinsic::x86_xop_vpcomfalsed:
9393 case Intrinsic::x86_xop_vpcomfalseq:
9395 Opc = X86ISD::VPCOM;
9397 case Intrinsic::x86_xop_vpcomfalseub:
9398 case Intrinsic::x86_xop_vpcomfalseuw:
9399 case Intrinsic::x86_xop_vpcomfalseud:
9400 case Intrinsic::x86_xop_vpcomfalseuq:
9402 Opc = X86ISD::VPCOMU;
9404 case Intrinsic::x86_xop_vpcomtrueb:
9405 case Intrinsic::x86_xop_vpcomtruew:
9406 case Intrinsic::x86_xop_vpcomtrued:
9407 case Intrinsic::x86_xop_vpcomtrueq:
9409 Opc = X86ISD::VPCOM;
9411 case Intrinsic::x86_xop_vpcomtrueub:
9412 case Intrinsic::x86_xop_vpcomtrueuw:
9413 case Intrinsic::x86_xop_vpcomtrueud:
9414 case Intrinsic::x86_xop_vpcomtrueuq:
9416 Opc = X86ISD::VPCOMU;
9420 SDValue LHS = Op.getOperand(1);
9421 SDValue RHS = Op.getOperand(2);
9422 return DAG.getNode(Opc, dl, Op.getValueType(), LHS, RHS,
9423 DAG.getConstant(CC, MVT::i8));
9426 // Arithmetic intrinsics.
9427 case Intrinsic::x86_sse2_pmulu_dq:
9428 case Intrinsic::x86_avx2_pmulu_dq:
9429 return DAG.getNode(X86ISD::PMULUDQ, dl, Op.getValueType(),
9430 Op.getOperand(1), Op.getOperand(2));
9431 case Intrinsic::x86_sse3_hadd_ps:
9432 case Intrinsic::x86_sse3_hadd_pd:
9433 case Intrinsic::x86_avx_hadd_ps_256:
9434 case Intrinsic::x86_avx_hadd_pd_256:
9435 return DAG.getNode(X86ISD::FHADD, dl, Op.getValueType(),
9436 Op.getOperand(1), Op.getOperand(2));
9437 case Intrinsic::x86_sse3_hsub_ps:
9438 case Intrinsic::x86_sse3_hsub_pd:
9439 case Intrinsic::x86_avx_hsub_ps_256:
9440 case Intrinsic::x86_avx_hsub_pd_256:
9441 return DAG.getNode(X86ISD::FHSUB, dl, Op.getValueType(),
9442 Op.getOperand(1), Op.getOperand(2));
9443 case Intrinsic::x86_ssse3_phadd_w_128:
9444 case Intrinsic::x86_ssse3_phadd_d_128:
9445 case Intrinsic::x86_avx2_phadd_w:
9446 case Intrinsic::x86_avx2_phadd_d:
9447 return DAG.getNode(X86ISD::HADD, dl, Op.getValueType(),
9448 Op.getOperand(1), Op.getOperand(2));
9449 case Intrinsic::x86_ssse3_phsub_w_128:
9450 case Intrinsic::x86_ssse3_phsub_d_128:
9451 case Intrinsic::x86_avx2_phsub_w:
9452 case Intrinsic::x86_avx2_phsub_d:
9453 return DAG.getNode(X86ISD::HSUB, dl, Op.getValueType(),
9454 Op.getOperand(1), Op.getOperand(2));
9455 case Intrinsic::x86_avx2_psllv_d:
9456 case Intrinsic::x86_avx2_psllv_q:
9457 case Intrinsic::x86_avx2_psllv_d_256:
9458 case Intrinsic::x86_avx2_psllv_q_256:
9459 return DAG.getNode(ISD::SHL, dl, Op.getValueType(),
9460 Op.getOperand(1), Op.getOperand(2));
9461 case Intrinsic::x86_avx2_psrlv_d:
9462 case Intrinsic::x86_avx2_psrlv_q:
9463 case Intrinsic::x86_avx2_psrlv_d_256:
9464 case Intrinsic::x86_avx2_psrlv_q_256:
9465 return DAG.getNode(ISD::SRL, dl, Op.getValueType(),
9466 Op.getOperand(1), Op.getOperand(2));
9467 case Intrinsic::x86_avx2_psrav_d:
9468 case Intrinsic::x86_avx2_psrav_d_256:
9469 return DAG.getNode(ISD::SRA, dl, Op.getValueType(),
9470 Op.getOperand(1), Op.getOperand(2));
9471 case Intrinsic::x86_ssse3_pshuf_b_128:
9472 case Intrinsic::x86_avx2_pshuf_b:
9473 return DAG.getNode(X86ISD::PSHUFB, dl, Op.getValueType(),
9474 Op.getOperand(1), Op.getOperand(2));
9475 case Intrinsic::x86_ssse3_psign_b_128:
9476 case Intrinsic::x86_ssse3_psign_w_128:
9477 case Intrinsic::x86_ssse3_psign_d_128:
9478 case Intrinsic::x86_avx2_psign_b:
9479 case Intrinsic::x86_avx2_psign_w:
9480 case Intrinsic::x86_avx2_psign_d:
9481 return DAG.getNode(X86ISD::PSIGN, dl, Op.getValueType(),
9482 Op.getOperand(1), Op.getOperand(2));
9483 case Intrinsic::x86_sse41_insertps:
9484 return DAG.getNode(X86ISD::INSERTPS, dl, Op.getValueType(),
9485 Op.getOperand(1), Op.getOperand(2), Op.getOperand(3));
9486 case Intrinsic::x86_avx_vperm2f128_ps_256:
9487 case Intrinsic::x86_avx_vperm2f128_pd_256:
9488 case Intrinsic::x86_avx_vperm2f128_si_256:
9489 case Intrinsic::x86_avx2_vperm2i128:
9490 return DAG.getNode(X86ISD::VPERM2X128, dl, Op.getValueType(),
9491 Op.getOperand(1), Op.getOperand(2), Op.getOperand(3));
9493 // ptest and testp intrinsics. The intrinsic these come from are designed to
9494 // return an integer value, not just an instruction so lower it to the ptest
9495 // or testp pattern and a setcc for the result.
9496 case Intrinsic::x86_sse41_ptestz:
9497 case Intrinsic::x86_sse41_ptestc:
9498 case Intrinsic::x86_sse41_ptestnzc:
9499 case Intrinsic::x86_avx_ptestz_256:
9500 case Intrinsic::x86_avx_ptestc_256:
9501 case Intrinsic::x86_avx_ptestnzc_256:
9502 case Intrinsic::x86_avx_vtestz_ps:
9503 case Intrinsic::x86_avx_vtestc_ps:
9504 case Intrinsic::x86_avx_vtestnzc_ps:
9505 case Intrinsic::x86_avx_vtestz_pd:
9506 case Intrinsic::x86_avx_vtestc_pd:
9507 case Intrinsic::x86_avx_vtestnzc_pd:
9508 case Intrinsic::x86_avx_vtestz_ps_256:
9509 case Intrinsic::x86_avx_vtestc_ps_256:
9510 case Intrinsic::x86_avx_vtestnzc_ps_256:
9511 case Intrinsic::x86_avx_vtestz_pd_256:
9512 case Intrinsic::x86_avx_vtestc_pd_256:
9513 case Intrinsic::x86_avx_vtestnzc_pd_256: {
9514 bool IsTestPacked = false;
9517 default: llvm_unreachable("Bad fallthrough in Intrinsic lowering.");
9518 case Intrinsic::x86_avx_vtestz_ps:
9519 case Intrinsic::x86_avx_vtestz_pd:
9520 case Intrinsic::x86_avx_vtestz_ps_256:
9521 case Intrinsic::x86_avx_vtestz_pd_256:
9522 IsTestPacked = true; // Fallthrough
9523 case Intrinsic::x86_sse41_ptestz:
9524 case Intrinsic::x86_avx_ptestz_256:
9526 X86CC = X86::COND_E;
9528 case Intrinsic::x86_avx_vtestc_ps:
9529 case Intrinsic::x86_avx_vtestc_pd:
9530 case Intrinsic::x86_avx_vtestc_ps_256:
9531 case Intrinsic::x86_avx_vtestc_pd_256:
9532 IsTestPacked = true; // Fallthrough
9533 case Intrinsic::x86_sse41_ptestc:
9534 case Intrinsic::x86_avx_ptestc_256:
9536 X86CC = X86::COND_B;
9538 case Intrinsic::x86_avx_vtestnzc_ps:
9539 case Intrinsic::x86_avx_vtestnzc_pd:
9540 case Intrinsic::x86_avx_vtestnzc_ps_256:
9541 case Intrinsic::x86_avx_vtestnzc_pd_256:
9542 IsTestPacked = true; // Fallthrough
9543 case Intrinsic::x86_sse41_ptestnzc:
9544 case Intrinsic::x86_avx_ptestnzc_256:
9546 X86CC = X86::COND_A;
9550 SDValue LHS = Op.getOperand(1);
9551 SDValue RHS = Op.getOperand(2);
9552 unsigned TestOpc = IsTestPacked ? X86ISD::TESTP : X86ISD::PTEST;
9553 SDValue Test = DAG.getNode(TestOpc, dl, MVT::i32, LHS, RHS);
9554 SDValue CC = DAG.getConstant(X86CC, MVT::i8);
9555 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8, CC, Test);
9556 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
9559 // SSE/AVX shift intrinsics
9560 case Intrinsic::x86_sse2_psll_w:
9561 case Intrinsic::x86_sse2_psll_d:
9562 case Intrinsic::x86_sse2_psll_q:
9563 case Intrinsic::x86_avx2_psll_w:
9564 case Intrinsic::x86_avx2_psll_d:
9565 case Intrinsic::x86_avx2_psll_q:
9566 return DAG.getNode(X86ISD::VSHL, dl, Op.getValueType(),
9567 Op.getOperand(1), Op.getOperand(2));
9568 case Intrinsic::x86_sse2_psrl_w:
9569 case Intrinsic::x86_sse2_psrl_d:
9570 case Intrinsic::x86_sse2_psrl_q:
9571 case Intrinsic::x86_avx2_psrl_w:
9572 case Intrinsic::x86_avx2_psrl_d:
9573 case Intrinsic::x86_avx2_psrl_q:
9574 return DAG.getNode(X86ISD::VSRL, dl, Op.getValueType(),
9575 Op.getOperand(1), Op.getOperand(2));
9576 case Intrinsic::x86_sse2_psra_w:
9577 case Intrinsic::x86_sse2_psra_d:
9578 case Intrinsic::x86_avx2_psra_w:
9579 case Intrinsic::x86_avx2_psra_d:
9580 return DAG.getNode(X86ISD::VSRA, dl, Op.getValueType(),
9581 Op.getOperand(1), Op.getOperand(2));
9582 case Intrinsic::x86_sse2_pslli_w:
9583 case Intrinsic::x86_sse2_pslli_d:
9584 case Intrinsic::x86_sse2_pslli_q:
9585 case Intrinsic::x86_avx2_pslli_w:
9586 case Intrinsic::x86_avx2_pslli_d:
9587 case Intrinsic::x86_avx2_pslli_q:
9588 return getTargetVShiftNode(X86ISD::VSHLI, dl, Op.getValueType(),
9589 Op.getOperand(1), Op.getOperand(2), DAG);
9590 case Intrinsic::x86_sse2_psrli_w:
9591 case Intrinsic::x86_sse2_psrli_d:
9592 case Intrinsic::x86_sse2_psrli_q:
9593 case Intrinsic::x86_avx2_psrli_w:
9594 case Intrinsic::x86_avx2_psrli_d:
9595 case Intrinsic::x86_avx2_psrli_q:
9596 return getTargetVShiftNode(X86ISD::VSRLI, dl, Op.getValueType(),
9597 Op.getOperand(1), Op.getOperand(2), DAG);
9598 case Intrinsic::x86_sse2_psrai_w:
9599 case Intrinsic::x86_sse2_psrai_d:
9600 case Intrinsic::x86_avx2_psrai_w:
9601 case Intrinsic::x86_avx2_psrai_d:
9602 return getTargetVShiftNode(X86ISD::VSRAI, dl, Op.getValueType(),
9603 Op.getOperand(1), Op.getOperand(2), DAG);
9604 // Fix vector shift instructions where the last operand is a non-immediate
9606 case Intrinsic::x86_mmx_pslli_w:
9607 case Intrinsic::x86_mmx_pslli_d:
9608 case Intrinsic::x86_mmx_pslli_q:
9609 case Intrinsic::x86_mmx_psrli_w:
9610 case Intrinsic::x86_mmx_psrli_d:
9611 case Intrinsic::x86_mmx_psrli_q:
9612 case Intrinsic::x86_mmx_psrai_w:
9613 case Intrinsic::x86_mmx_psrai_d: {
9614 SDValue ShAmt = Op.getOperand(2);
9615 if (isa<ConstantSDNode>(ShAmt))
9618 unsigned NewIntNo = 0;
9620 case Intrinsic::x86_mmx_pslli_w:
9621 NewIntNo = Intrinsic::x86_mmx_psll_w;
9623 case Intrinsic::x86_mmx_pslli_d:
9624 NewIntNo = Intrinsic::x86_mmx_psll_d;
9626 case Intrinsic::x86_mmx_pslli_q:
9627 NewIntNo = Intrinsic::x86_mmx_psll_q;
9629 case Intrinsic::x86_mmx_psrli_w:
9630 NewIntNo = Intrinsic::x86_mmx_psrl_w;
9632 case Intrinsic::x86_mmx_psrli_d:
9633 NewIntNo = Intrinsic::x86_mmx_psrl_d;
9635 case Intrinsic::x86_mmx_psrli_q:
9636 NewIntNo = Intrinsic::x86_mmx_psrl_q;
9638 case Intrinsic::x86_mmx_psrai_w:
9639 NewIntNo = Intrinsic::x86_mmx_psra_w;
9641 case Intrinsic::x86_mmx_psrai_d:
9642 NewIntNo = Intrinsic::x86_mmx_psra_d;
9644 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
9647 // The vector shift intrinsics with scalars uses 32b shift amounts but
9648 // the sse2/mmx shift instructions reads 64 bits. Set the upper 32 bits
9650 ShAmt = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v2i32, ShAmt,
9651 DAG.getConstant(0, MVT::i32));
9652 // FIXME this must be lowered to get rid of the invalid type.
9654 EVT VT = Op.getValueType();
9655 ShAmt = DAG.getNode(ISD::BITCAST, dl, VT, ShAmt);
9656 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
9657 DAG.getConstant(NewIntNo, MVT::i32),
9658 Op.getOperand(1), ShAmt);
9663 SDValue X86TargetLowering::LowerRETURNADDR(SDValue Op,
9664 SelectionDAG &DAG) const {
9665 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
9666 MFI->setReturnAddressIsTaken(true);
9668 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
9669 DebugLoc dl = Op.getDebugLoc();
9672 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
9674 DAG.getConstant(TD->getPointerSize(),
9675 Subtarget->is64Bit() ? MVT::i64 : MVT::i32);
9676 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
9677 DAG.getNode(ISD::ADD, dl, getPointerTy(),
9679 MachinePointerInfo(), false, false, false, 0);
9682 // Just load the return address.
9683 SDValue RetAddrFI = getReturnAddressFrameIndex(DAG);
9684 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
9685 RetAddrFI, MachinePointerInfo(), false, false, false, 0);
9688 SDValue X86TargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
9689 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
9690 MFI->setFrameAddressIsTaken(true);
9692 EVT VT = Op.getValueType();
9693 DebugLoc dl = Op.getDebugLoc(); // FIXME probably not meaningful
9694 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
9695 unsigned FrameReg = Subtarget->is64Bit() ? X86::RBP : X86::EBP;
9696 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
9698 FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr,
9699 MachinePointerInfo(),
9700 false, false, false, 0);
9704 SDValue X86TargetLowering::LowerFRAME_TO_ARGS_OFFSET(SDValue Op,
9705 SelectionDAG &DAG) const {
9706 return DAG.getIntPtrConstant(2*TD->getPointerSize());
9709 SDValue X86TargetLowering::LowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const {
9710 MachineFunction &MF = DAG.getMachineFunction();
9711 SDValue Chain = Op.getOperand(0);
9712 SDValue Offset = Op.getOperand(1);
9713 SDValue Handler = Op.getOperand(2);
9714 DebugLoc dl = Op.getDebugLoc();
9716 SDValue Frame = DAG.getCopyFromReg(DAG.getEntryNode(), dl,
9717 Subtarget->is64Bit() ? X86::RBP : X86::EBP,
9719 unsigned StoreAddrReg = (Subtarget->is64Bit() ? X86::RCX : X86::ECX);
9721 SDValue StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), Frame,
9722 DAG.getIntPtrConstant(TD->getPointerSize()));
9723 StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), StoreAddr, Offset);
9724 Chain = DAG.getStore(Chain, dl, Handler, StoreAddr, MachinePointerInfo(),
9726 Chain = DAG.getCopyToReg(Chain, dl, StoreAddrReg, StoreAddr);
9727 MF.getRegInfo().addLiveOut(StoreAddrReg);
9729 return DAG.getNode(X86ISD::EH_RETURN, dl,
9731 Chain, DAG.getRegister(StoreAddrReg, getPointerTy()));
9734 SDValue X86TargetLowering::LowerADJUST_TRAMPOLINE(SDValue Op,
9735 SelectionDAG &DAG) const {
9736 return Op.getOperand(0);
9739 SDValue X86TargetLowering::LowerINIT_TRAMPOLINE(SDValue Op,
9740 SelectionDAG &DAG) const {
9741 SDValue Root = Op.getOperand(0);
9742 SDValue Trmp = Op.getOperand(1); // trampoline
9743 SDValue FPtr = Op.getOperand(2); // nested function
9744 SDValue Nest = Op.getOperand(3); // 'nest' parameter value
9745 DebugLoc dl = Op.getDebugLoc();
9747 const Value *TrmpAddr = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
9749 if (Subtarget->is64Bit()) {
9750 SDValue OutChains[6];
9752 // Large code-model.
9753 const unsigned char JMP64r = 0xFF; // 64-bit jmp through register opcode.
9754 const unsigned char MOV64ri = 0xB8; // X86::MOV64ri opcode.
9756 const unsigned char N86R10 = X86_MC::getX86RegNum(X86::R10);
9757 const unsigned char N86R11 = X86_MC::getX86RegNum(X86::R11);
9759 const unsigned char REX_WB = 0x40 | 0x08 | 0x01; // REX prefix
9761 // Load the pointer to the nested function into R11.
9762 unsigned OpCode = ((MOV64ri | N86R11) << 8) | REX_WB; // movabsq r11
9763 SDValue Addr = Trmp;
9764 OutChains[0] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
9765 Addr, MachinePointerInfo(TrmpAddr),
9768 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
9769 DAG.getConstant(2, MVT::i64));
9770 OutChains[1] = DAG.getStore(Root, dl, FPtr, Addr,
9771 MachinePointerInfo(TrmpAddr, 2),
9774 // Load the 'nest' parameter value into R10.
9775 // R10 is specified in X86CallingConv.td
9776 OpCode = ((MOV64ri | N86R10) << 8) | REX_WB; // movabsq r10
9777 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
9778 DAG.getConstant(10, MVT::i64));
9779 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
9780 Addr, MachinePointerInfo(TrmpAddr, 10),
9783 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
9784 DAG.getConstant(12, MVT::i64));
9785 OutChains[3] = DAG.getStore(Root, dl, Nest, Addr,
9786 MachinePointerInfo(TrmpAddr, 12),
9789 // Jump to the nested function.
9790 OpCode = (JMP64r << 8) | REX_WB; // jmpq *...
9791 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
9792 DAG.getConstant(20, MVT::i64));
9793 OutChains[4] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
9794 Addr, MachinePointerInfo(TrmpAddr, 20),
9797 unsigned char ModRM = N86R11 | (4 << 3) | (3 << 6); // ...r11
9798 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
9799 DAG.getConstant(22, MVT::i64));
9800 OutChains[5] = DAG.getStore(Root, dl, DAG.getConstant(ModRM, MVT::i8), Addr,
9801 MachinePointerInfo(TrmpAddr, 22),
9804 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 6);
9806 const Function *Func =
9807 cast<Function>(cast<SrcValueSDNode>(Op.getOperand(5))->getValue());
9808 CallingConv::ID CC = Func->getCallingConv();
9813 llvm_unreachable("Unsupported calling convention");
9814 case CallingConv::C:
9815 case CallingConv::X86_StdCall: {
9816 // Pass 'nest' parameter in ECX.
9817 // Must be kept in sync with X86CallingConv.td
9820 // Check that ECX wasn't needed by an 'inreg' parameter.
9821 FunctionType *FTy = Func->getFunctionType();
9822 const AttrListPtr &Attrs = Func->getAttributes();
9824 if (!Attrs.isEmpty() && !Func->isVarArg()) {
9825 unsigned InRegCount = 0;
9828 for (FunctionType::param_iterator I = FTy->param_begin(),
9829 E = FTy->param_end(); I != E; ++I, ++Idx)
9830 if (Attrs.paramHasAttr(Idx, Attribute::InReg))
9831 // FIXME: should only count parameters that are lowered to integers.
9832 InRegCount += (TD->getTypeSizeInBits(*I) + 31) / 32;
9834 if (InRegCount > 2) {
9835 report_fatal_error("Nest register in use - reduce number of inreg"
9841 case CallingConv::X86_FastCall:
9842 case CallingConv::X86_ThisCall:
9843 case CallingConv::Fast:
9844 // Pass 'nest' parameter in EAX.
9845 // Must be kept in sync with X86CallingConv.td
9850 SDValue OutChains[4];
9853 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
9854 DAG.getConstant(10, MVT::i32));
9855 Disp = DAG.getNode(ISD::SUB, dl, MVT::i32, FPtr, Addr);
9857 // This is storing the opcode for MOV32ri.
9858 const unsigned char MOV32ri = 0xB8; // X86::MOV32ri's opcode byte.
9859 const unsigned char N86Reg = X86_MC::getX86RegNum(NestReg);
9860 OutChains[0] = DAG.getStore(Root, dl,
9861 DAG.getConstant(MOV32ri|N86Reg, MVT::i8),
9862 Trmp, MachinePointerInfo(TrmpAddr),
9865 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
9866 DAG.getConstant(1, MVT::i32));
9867 OutChains[1] = DAG.getStore(Root, dl, Nest, Addr,
9868 MachinePointerInfo(TrmpAddr, 1),
9871 const unsigned char JMP = 0xE9; // jmp <32bit dst> opcode.
9872 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
9873 DAG.getConstant(5, MVT::i32));
9874 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(JMP, MVT::i8), Addr,
9875 MachinePointerInfo(TrmpAddr, 5),
9878 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
9879 DAG.getConstant(6, MVT::i32));
9880 OutChains[3] = DAG.getStore(Root, dl, Disp, Addr,
9881 MachinePointerInfo(TrmpAddr, 6),
9884 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 4);
9888 SDValue X86TargetLowering::LowerFLT_ROUNDS_(SDValue Op,
9889 SelectionDAG &DAG) const {
9891 The rounding mode is in bits 11:10 of FPSR, and has the following
9898 FLT_ROUNDS, on the other hand, expects the following:
9905 To perform the conversion, we do:
9906 (((((FPSR & 0x800) >> 11) | ((FPSR & 0x400) >> 9)) + 1) & 3)
9909 MachineFunction &MF = DAG.getMachineFunction();
9910 const TargetMachine &TM = MF.getTarget();
9911 const TargetFrameLowering &TFI = *TM.getFrameLowering();
9912 unsigned StackAlignment = TFI.getStackAlignment();
9913 EVT VT = Op.getValueType();
9914 DebugLoc DL = Op.getDebugLoc();
9916 // Save FP Control Word to stack slot
9917 int SSFI = MF.getFrameInfo()->CreateStackObject(2, StackAlignment, false);
9918 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
9921 MachineMemOperand *MMO =
9922 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
9923 MachineMemOperand::MOStore, 2, 2);
9925 SDValue Ops[] = { DAG.getEntryNode(), StackSlot };
9926 SDValue Chain = DAG.getMemIntrinsicNode(X86ISD::FNSTCW16m, DL,
9927 DAG.getVTList(MVT::Other),
9928 Ops, 2, MVT::i16, MMO);
9930 // Load FP Control Word from stack slot
9931 SDValue CWD = DAG.getLoad(MVT::i16, DL, Chain, StackSlot,
9932 MachinePointerInfo(), false, false, false, 0);
9934 // Transform as necessary
9936 DAG.getNode(ISD::SRL, DL, MVT::i16,
9937 DAG.getNode(ISD::AND, DL, MVT::i16,
9938 CWD, DAG.getConstant(0x800, MVT::i16)),
9939 DAG.getConstant(11, MVT::i8));
9941 DAG.getNode(ISD::SRL, DL, MVT::i16,
9942 DAG.getNode(ISD::AND, DL, MVT::i16,
9943 CWD, DAG.getConstant(0x400, MVT::i16)),
9944 DAG.getConstant(9, MVT::i8));
9947 DAG.getNode(ISD::AND, DL, MVT::i16,
9948 DAG.getNode(ISD::ADD, DL, MVT::i16,
9949 DAG.getNode(ISD::OR, DL, MVT::i16, CWD1, CWD2),
9950 DAG.getConstant(1, MVT::i16)),
9951 DAG.getConstant(3, MVT::i16));
9954 return DAG.getNode((VT.getSizeInBits() < 16 ?
9955 ISD::TRUNCATE : ISD::ZERO_EXTEND), DL, VT, RetVal);
9958 SDValue X86TargetLowering::LowerCTLZ(SDValue Op, SelectionDAG &DAG) const {
9959 EVT VT = Op.getValueType();
9961 unsigned NumBits = VT.getSizeInBits();
9962 DebugLoc dl = Op.getDebugLoc();
9964 Op = Op.getOperand(0);
9965 if (VT == MVT::i8) {
9966 // Zero extend to i32 since there is not an i8 bsr.
9968 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
9971 // Issue a bsr (scan bits in reverse) which also sets EFLAGS.
9972 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
9973 Op = DAG.getNode(X86ISD::BSR, dl, VTs, Op);
9975 // If src is zero (i.e. bsr sets ZF), returns NumBits.
9978 DAG.getConstant(NumBits+NumBits-1, OpVT),
9979 DAG.getConstant(X86::COND_E, MVT::i8),
9982 Op = DAG.getNode(X86ISD::CMOV, dl, OpVT, Ops, array_lengthof(Ops));
9984 // Finally xor with NumBits-1.
9985 Op = DAG.getNode(ISD::XOR, dl, OpVT, Op, DAG.getConstant(NumBits-1, OpVT));
9988 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
9992 SDValue X86TargetLowering::LowerCTLZ_ZERO_UNDEF(SDValue Op,
9993 SelectionDAG &DAG) const {
9994 EVT VT = Op.getValueType();
9996 unsigned NumBits = VT.getSizeInBits();
9997 DebugLoc dl = Op.getDebugLoc();
9999 Op = Op.getOperand(0);
10000 if (VT == MVT::i8) {
10001 // Zero extend to i32 since there is not an i8 bsr.
10003 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
10006 // Issue a bsr (scan bits in reverse).
10007 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
10008 Op = DAG.getNode(X86ISD::BSR, dl, VTs, Op);
10010 // And xor with NumBits-1.
10011 Op = DAG.getNode(ISD::XOR, dl, OpVT, Op, DAG.getConstant(NumBits-1, OpVT));
10014 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
10018 SDValue X86TargetLowering::LowerCTTZ(SDValue Op, SelectionDAG &DAG) const {
10019 EVT VT = Op.getValueType();
10020 unsigned NumBits = VT.getSizeInBits();
10021 DebugLoc dl = Op.getDebugLoc();
10022 Op = Op.getOperand(0);
10024 // Issue a bsf (scan bits forward) which also sets EFLAGS.
10025 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
10026 Op = DAG.getNode(X86ISD::BSF, dl, VTs, Op);
10028 // If src is zero (i.e. bsf sets ZF), returns NumBits.
10031 DAG.getConstant(NumBits, VT),
10032 DAG.getConstant(X86::COND_E, MVT::i8),
10035 return DAG.getNode(X86ISD::CMOV, dl, VT, Ops, array_lengthof(Ops));
10038 // Lower256IntArith - Break a 256-bit integer operation into two new 128-bit
10039 // ones, and then concatenate the result back.
10040 static SDValue Lower256IntArith(SDValue Op, SelectionDAG &DAG) {
10041 EVT VT = Op.getValueType();
10043 assert(VT.getSizeInBits() == 256 && VT.isInteger() &&
10044 "Unsupported value type for operation");
10046 int NumElems = VT.getVectorNumElements();
10047 DebugLoc dl = Op.getDebugLoc();
10048 SDValue Idx0 = DAG.getConstant(0, MVT::i32);
10049 SDValue Idx1 = DAG.getConstant(NumElems/2, MVT::i32);
10051 // Extract the LHS vectors
10052 SDValue LHS = Op.getOperand(0);
10053 SDValue LHS1 = Extract128BitVector(LHS, Idx0, DAG, dl);
10054 SDValue LHS2 = Extract128BitVector(LHS, Idx1, DAG, dl);
10056 // Extract the RHS vectors
10057 SDValue RHS = Op.getOperand(1);
10058 SDValue RHS1 = Extract128BitVector(RHS, Idx0, DAG, dl);
10059 SDValue RHS2 = Extract128BitVector(RHS, Idx1, DAG, dl);
10061 MVT EltVT = VT.getVectorElementType().getSimpleVT();
10062 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
10064 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT,
10065 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, RHS1),
10066 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, RHS2));
10069 SDValue X86TargetLowering::LowerADD(SDValue Op, SelectionDAG &DAG) const {
10070 assert(Op.getValueType().getSizeInBits() == 256 &&
10071 Op.getValueType().isInteger() &&
10072 "Only handle AVX 256-bit vector integer operation");
10073 return Lower256IntArith(Op, DAG);
10076 SDValue X86TargetLowering::LowerSUB(SDValue Op, SelectionDAG &DAG) const {
10077 assert(Op.getValueType().getSizeInBits() == 256 &&
10078 Op.getValueType().isInteger() &&
10079 "Only handle AVX 256-bit vector integer operation");
10080 return Lower256IntArith(Op, DAG);
10083 SDValue X86TargetLowering::LowerMUL(SDValue Op, SelectionDAG &DAG) const {
10084 EVT VT = Op.getValueType();
10086 // Decompose 256-bit ops into smaller 128-bit ops.
10087 if (VT.getSizeInBits() == 256 && !Subtarget->hasAVX2())
10088 return Lower256IntArith(Op, DAG);
10090 assert((VT == MVT::v2i64 || VT == MVT::v4i64) &&
10091 "Only know how to lower V2I64/V4I64 multiply");
10093 DebugLoc dl = Op.getDebugLoc();
10095 // Ahi = psrlqi(a, 32);
10096 // Bhi = psrlqi(b, 32);
10098 // AloBlo = pmuludq(a, b);
10099 // AloBhi = pmuludq(a, Bhi);
10100 // AhiBlo = pmuludq(Ahi, b);
10102 // AloBhi = psllqi(AloBhi, 32);
10103 // AhiBlo = psllqi(AhiBlo, 32);
10104 // return AloBlo + AloBhi + AhiBlo;
10106 SDValue A = Op.getOperand(0);
10107 SDValue B = Op.getOperand(1);
10109 SDValue ShAmt = DAG.getConstant(32, MVT::i32);
10111 SDValue Ahi = DAG.getNode(X86ISD::VSRLI, dl, VT, A, ShAmt);
10112 SDValue Bhi = DAG.getNode(X86ISD::VSRLI, dl, VT, B, ShAmt);
10114 // Bit cast to 32-bit vectors for MULUDQ
10115 EVT MulVT = (VT == MVT::v2i64) ? MVT::v4i32 : MVT::v8i32;
10116 A = DAG.getNode(ISD::BITCAST, dl, MulVT, A);
10117 B = DAG.getNode(ISD::BITCAST, dl, MulVT, B);
10118 Ahi = DAG.getNode(ISD::BITCAST, dl, MulVT, Ahi);
10119 Bhi = DAG.getNode(ISD::BITCAST, dl, MulVT, Bhi);
10121 SDValue AloBlo = DAG.getNode(X86ISD::PMULUDQ, dl, VT, A, B);
10122 SDValue AloBhi = DAG.getNode(X86ISD::PMULUDQ, dl, VT, A, Bhi);
10123 SDValue AhiBlo = DAG.getNode(X86ISD::PMULUDQ, dl, VT, Ahi, B);
10125 AloBhi = DAG.getNode(X86ISD::VSHLI, dl, VT, AloBhi, ShAmt);
10126 AhiBlo = DAG.getNode(X86ISD::VSHLI, dl, VT, AhiBlo, ShAmt);
10128 SDValue Res = DAG.getNode(ISD::ADD, dl, VT, AloBlo, AloBhi);
10129 return DAG.getNode(ISD::ADD, dl, VT, Res, AhiBlo);
10132 SDValue X86TargetLowering::LowerShift(SDValue Op, SelectionDAG &DAG) const {
10134 EVT VT = Op.getValueType();
10135 DebugLoc dl = Op.getDebugLoc();
10136 SDValue R = Op.getOperand(0);
10137 SDValue Amt = Op.getOperand(1);
10138 LLVMContext *Context = DAG.getContext();
10140 if (!Subtarget->hasSSE2())
10143 // Optimize shl/srl/sra with constant shift amount.
10144 if (isSplatVector(Amt.getNode())) {
10145 SDValue SclrAmt = Amt->getOperand(0);
10146 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(SclrAmt)) {
10147 uint64_t ShiftAmt = C->getZExtValue();
10149 if (VT == MVT::v2i64 || VT == MVT::v4i32 || VT == MVT::v8i16 ||
10150 (Subtarget->hasAVX2() &&
10151 (VT == MVT::v4i64 || VT == MVT::v8i32 || VT == MVT::v16i16))) {
10152 if (Op.getOpcode() == ISD::SHL)
10153 return DAG.getNode(X86ISD::VSHLI, dl, VT, R,
10154 DAG.getConstant(ShiftAmt, MVT::i32));
10155 if (Op.getOpcode() == ISD::SRL)
10156 return DAG.getNode(X86ISD::VSRLI, dl, VT, R,
10157 DAG.getConstant(ShiftAmt, MVT::i32));
10158 if (Op.getOpcode() == ISD::SRA && VT != MVT::v2i64 && VT != MVT::v4i64)
10159 return DAG.getNode(X86ISD::VSRAI, dl, VT, R,
10160 DAG.getConstant(ShiftAmt, MVT::i32));
10163 if (VT == MVT::v16i8) {
10164 if (Op.getOpcode() == ISD::SHL) {
10165 // Make a large shift.
10166 SDValue SHL = DAG.getNode(X86ISD::VSHLI, dl, MVT::v8i16, R,
10167 DAG.getConstant(ShiftAmt, MVT::i32));
10168 SHL = DAG.getNode(ISD::BITCAST, dl, VT, SHL);
10169 // Zero out the rightmost bits.
10170 SmallVector<SDValue, 16> V(16,
10171 DAG.getConstant(uint8_t(-1U << ShiftAmt),
10173 return DAG.getNode(ISD::AND, dl, VT, SHL,
10174 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 16));
10176 if (Op.getOpcode() == ISD::SRL) {
10177 // Make a large shift.
10178 SDValue SRL = DAG.getNode(X86ISD::VSRLI, dl, MVT::v8i16, R,
10179 DAG.getConstant(ShiftAmt, MVT::i32));
10180 SRL = DAG.getNode(ISD::BITCAST, dl, VT, SRL);
10181 // Zero out the leftmost bits.
10182 SmallVector<SDValue, 16> V(16,
10183 DAG.getConstant(uint8_t(-1U) >> ShiftAmt,
10185 return DAG.getNode(ISD::AND, dl, VT, SRL,
10186 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 16));
10188 if (Op.getOpcode() == ISD::SRA) {
10189 if (ShiftAmt == 7) {
10190 // R s>> 7 === R s< 0
10191 SDValue Zeros = getZeroVector(VT, Subtarget, DAG, dl);
10192 return DAG.getNode(X86ISD::PCMPGT, dl, VT, Zeros, R);
10195 // R s>> a === ((R u>> a) ^ m) - m
10196 SDValue Res = DAG.getNode(ISD::SRL, dl, VT, R, Amt);
10197 SmallVector<SDValue, 16> V(16, DAG.getConstant(128 >> ShiftAmt,
10199 SDValue Mask = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 16);
10200 Res = DAG.getNode(ISD::XOR, dl, VT, Res, Mask);
10201 Res = DAG.getNode(ISD::SUB, dl, VT, Res, Mask);
10206 if (Subtarget->hasAVX2() && VT == MVT::v32i8) {
10207 if (Op.getOpcode() == ISD::SHL) {
10208 // Make a large shift.
10209 SDValue SHL = DAG.getNode(X86ISD::VSHLI, dl, MVT::v16i16, R,
10210 DAG.getConstant(ShiftAmt, MVT::i32));
10211 SHL = DAG.getNode(ISD::BITCAST, dl, VT, SHL);
10212 // Zero out the rightmost bits.
10213 SmallVector<SDValue, 32> V(32,
10214 DAG.getConstant(uint8_t(-1U << ShiftAmt),
10216 return DAG.getNode(ISD::AND, dl, VT, SHL,
10217 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 32));
10219 if (Op.getOpcode() == ISD::SRL) {
10220 // Make a large shift.
10221 SDValue SRL = DAG.getNode(X86ISD::VSRLI, dl, MVT::v16i16, R,
10222 DAG.getConstant(ShiftAmt, MVT::i32));
10223 SRL = DAG.getNode(ISD::BITCAST, dl, VT, SRL);
10224 // Zero out the leftmost bits.
10225 SmallVector<SDValue, 32> V(32,
10226 DAG.getConstant(uint8_t(-1U) >> ShiftAmt,
10228 return DAG.getNode(ISD::AND, dl, VT, SRL,
10229 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 32));
10231 if (Op.getOpcode() == ISD::SRA) {
10232 if (ShiftAmt == 7) {
10233 // R s>> 7 === R s< 0
10234 SDValue Zeros = getZeroVector(VT, Subtarget, DAG, dl);
10235 return DAG.getNode(X86ISD::PCMPGT, dl, VT, Zeros, R);
10238 // R s>> a === ((R u>> a) ^ m) - m
10239 SDValue Res = DAG.getNode(ISD::SRL, dl, VT, R, Amt);
10240 SmallVector<SDValue, 32> V(32, DAG.getConstant(128 >> ShiftAmt,
10242 SDValue Mask = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 32);
10243 Res = DAG.getNode(ISD::XOR, dl, VT, Res, Mask);
10244 Res = DAG.getNode(ISD::SUB, dl, VT, Res, Mask);
10251 // Lower SHL with variable shift amount.
10252 if (VT == MVT::v4i32 && Op->getOpcode() == ISD::SHL) {
10253 Op = DAG.getNode(X86ISD::VSHLI, dl, VT, Op.getOperand(1),
10254 DAG.getConstant(23, MVT::i32));
10256 ConstantInt *CI = ConstantInt::get(*Context, APInt(32, 0x3f800000U));
10257 Constant *C = ConstantVector::getSplat(4, CI);
10258 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
10259 SDValue Addend = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
10260 MachinePointerInfo::getConstantPool(),
10261 false, false, false, 16);
10263 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Addend);
10264 Op = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, Op);
10265 Op = DAG.getNode(ISD::FP_TO_SINT, dl, VT, Op);
10266 return DAG.getNode(ISD::MUL, dl, VT, Op, R);
10268 if (VT == MVT::v16i8 && Op->getOpcode() == ISD::SHL) {
10269 assert(Subtarget->hasSSE2() && "Need SSE2 for pslli/pcmpeq.");
10272 Op = DAG.getNode(X86ISD::VSHLI, dl, MVT::v8i16, Op.getOperand(1),
10273 DAG.getConstant(5, MVT::i32));
10274 Op = DAG.getNode(ISD::BITCAST, dl, VT, Op);
10276 // Turn 'a' into a mask suitable for VSELECT
10277 SDValue VSelM = DAG.getConstant(0x80, VT);
10278 SDValue OpVSel = DAG.getNode(ISD::AND, dl, VT, VSelM, Op);
10279 OpVSel = DAG.getNode(X86ISD::PCMPEQ, dl, VT, OpVSel, VSelM);
10281 SDValue CM1 = DAG.getConstant(0x0f, VT);
10282 SDValue CM2 = DAG.getConstant(0x3f, VT);
10284 // r = VSELECT(r, psllw(r & (char16)15, 4), a);
10285 SDValue M = DAG.getNode(ISD::AND, dl, VT, R, CM1);
10286 M = getTargetVShiftNode(X86ISD::VSHLI, dl, MVT::v8i16, M,
10287 DAG.getConstant(4, MVT::i32), DAG);
10288 M = DAG.getNode(ISD::BITCAST, dl, VT, M);
10289 R = DAG.getNode(ISD::VSELECT, dl, VT, OpVSel, M, R);
10292 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Op);
10293 OpVSel = DAG.getNode(ISD::AND, dl, VT, VSelM, Op);
10294 OpVSel = DAG.getNode(X86ISD::PCMPEQ, dl, VT, OpVSel, VSelM);
10296 // r = VSELECT(r, psllw(r & (char16)63, 2), a);
10297 M = DAG.getNode(ISD::AND, dl, VT, R, CM2);
10298 M = getTargetVShiftNode(X86ISD::VSHLI, dl, MVT::v8i16, M,
10299 DAG.getConstant(2, MVT::i32), DAG);
10300 M = DAG.getNode(ISD::BITCAST, dl, VT, M);
10301 R = DAG.getNode(ISD::VSELECT, dl, VT, OpVSel, M, R);
10304 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Op);
10305 OpVSel = DAG.getNode(ISD::AND, dl, VT, VSelM, Op);
10306 OpVSel = DAG.getNode(X86ISD::PCMPEQ, dl, VT, OpVSel, VSelM);
10308 // return VSELECT(r, r+r, a);
10309 R = DAG.getNode(ISD::VSELECT, dl, VT, OpVSel,
10310 DAG.getNode(ISD::ADD, dl, VT, R, R), R);
10314 // Decompose 256-bit shifts into smaller 128-bit shifts.
10315 if (VT.getSizeInBits() == 256) {
10316 unsigned NumElems = VT.getVectorNumElements();
10317 MVT EltVT = VT.getVectorElementType().getSimpleVT();
10318 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
10320 // Extract the two vectors
10321 SDValue V1 = Extract128BitVector(R, DAG.getConstant(0, MVT::i32), DAG, dl);
10322 SDValue V2 = Extract128BitVector(R, DAG.getConstant(NumElems/2, MVT::i32),
10325 // Recreate the shift amount vectors
10326 SDValue Amt1, Amt2;
10327 if (Amt.getOpcode() == ISD::BUILD_VECTOR) {
10328 // Constant shift amount
10329 SmallVector<SDValue, 4> Amt1Csts;
10330 SmallVector<SDValue, 4> Amt2Csts;
10331 for (unsigned i = 0; i != NumElems/2; ++i)
10332 Amt1Csts.push_back(Amt->getOperand(i));
10333 for (unsigned i = NumElems/2; i != NumElems; ++i)
10334 Amt2Csts.push_back(Amt->getOperand(i));
10336 Amt1 = DAG.getNode(ISD::BUILD_VECTOR, dl, NewVT,
10337 &Amt1Csts[0], NumElems/2);
10338 Amt2 = DAG.getNode(ISD::BUILD_VECTOR, dl, NewVT,
10339 &Amt2Csts[0], NumElems/2);
10341 // Variable shift amount
10342 Amt1 = Extract128BitVector(Amt, DAG.getConstant(0, MVT::i32), DAG, dl);
10343 Amt2 = Extract128BitVector(Amt, DAG.getConstant(NumElems/2, MVT::i32),
10347 // Issue new vector shifts for the smaller types
10348 V1 = DAG.getNode(Op.getOpcode(), dl, NewVT, V1, Amt1);
10349 V2 = DAG.getNode(Op.getOpcode(), dl, NewVT, V2, Amt2);
10351 // Concatenate the result back
10352 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, V1, V2);
10358 SDValue X86TargetLowering::LowerXALUO(SDValue Op, SelectionDAG &DAG) const {
10359 // Lower the "add/sub/mul with overflow" instruction into a regular ins plus
10360 // a "setcc" instruction that checks the overflow flag. The "brcond" lowering
10361 // looks for this combo and may remove the "setcc" instruction if the "setcc"
10362 // has only one use.
10363 SDNode *N = Op.getNode();
10364 SDValue LHS = N->getOperand(0);
10365 SDValue RHS = N->getOperand(1);
10366 unsigned BaseOp = 0;
10368 DebugLoc DL = Op.getDebugLoc();
10369 switch (Op.getOpcode()) {
10370 default: llvm_unreachable("Unknown ovf instruction!");
10372 // A subtract of one will be selected as a INC. Note that INC doesn't
10373 // set CF, so we can't do this for UADDO.
10374 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS))
10376 BaseOp = X86ISD::INC;
10377 Cond = X86::COND_O;
10380 BaseOp = X86ISD::ADD;
10381 Cond = X86::COND_O;
10384 BaseOp = X86ISD::ADD;
10385 Cond = X86::COND_B;
10388 // A subtract of one will be selected as a DEC. Note that DEC doesn't
10389 // set CF, so we can't do this for USUBO.
10390 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS))
10392 BaseOp = X86ISD::DEC;
10393 Cond = X86::COND_O;
10396 BaseOp = X86ISD::SUB;
10397 Cond = X86::COND_O;
10400 BaseOp = X86ISD::SUB;
10401 Cond = X86::COND_B;
10404 BaseOp = X86ISD::SMUL;
10405 Cond = X86::COND_O;
10407 case ISD::UMULO: { // i64, i8 = umulo lhs, rhs --> i64, i64, i32 umul lhs,rhs
10408 SDVTList VTs = DAG.getVTList(N->getValueType(0), N->getValueType(0),
10410 SDValue Sum = DAG.getNode(X86ISD::UMUL, DL, VTs, LHS, RHS);
10413 DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
10414 DAG.getConstant(X86::COND_O, MVT::i32),
10415 SDValue(Sum.getNode(), 2));
10417 return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), Sum, SetCC);
10421 // Also sets EFLAGS.
10422 SDVTList VTs = DAG.getVTList(N->getValueType(0), MVT::i32);
10423 SDValue Sum = DAG.getNode(BaseOp, DL, VTs, LHS, RHS);
10426 DAG.getNode(X86ISD::SETCC, DL, N->getValueType(1),
10427 DAG.getConstant(Cond, MVT::i32),
10428 SDValue(Sum.getNode(), 1));
10430 return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), Sum, SetCC);
10433 SDValue X86TargetLowering::LowerSIGN_EXTEND_INREG(SDValue Op,
10434 SelectionDAG &DAG) const {
10435 DebugLoc dl = Op.getDebugLoc();
10436 EVT ExtraVT = cast<VTSDNode>(Op.getOperand(1))->getVT();
10437 EVT VT = Op.getValueType();
10439 if (!Subtarget->hasSSE2() || !VT.isVector())
10442 unsigned BitsDiff = VT.getScalarType().getSizeInBits() -
10443 ExtraVT.getScalarType().getSizeInBits();
10444 SDValue ShAmt = DAG.getConstant(BitsDiff, MVT::i32);
10446 switch (VT.getSimpleVT().SimpleTy) {
10447 default: return SDValue();
10450 if (!Subtarget->hasAVX())
10452 if (!Subtarget->hasAVX2()) {
10453 // needs to be split
10454 int NumElems = VT.getVectorNumElements();
10455 SDValue Idx0 = DAG.getConstant(0, MVT::i32);
10456 SDValue Idx1 = DAG.getConstant(NumElems/2, MVT::i32);
10458 // Extract the LHS vectors
10459 SDValue LHS = Op.getOperand(0);
10460 SDValue LHS1 = Extract128BitVector(LHS, Idx0, DAG, dl);
10461 SDValue LHS2 = Extract128BitVector(LHS, Idx1, DAG, dl);
10463 MVT EltVT = VT.getVectorElementType().getSimpleVT();
10464 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
10466 EVT ExtraEltVT = ExtraVT.getVectorElementType();
10467 int ExtraNumElems = ExtraVT.getVectorNumElements();
10468 ExtraVT = EVT::getVectorVT(*DAG.getContext(), ExtraEltVT,
10470 SDValue Extra = DAG.getValueType(ExtraVT);
10472 LHS1 = DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, Extra);
10473 LHS2 = DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, Extra);
10475 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, LHS1, LHS2);;
10480 SDValue Tmp1 = getTargetVShiftNode(X86ISD::VSHLI, dl, VT,
10481 Op.getOperand(0), ShAmt, DAG);
10482 return getTargetVShiftNode(X86ISD::VSRAI, dl, VT, Tmp1, ShAmt, DAG);
10488 SDValue X86TargetLowering::LowerMEMBARRIER(SDValue Op, SelectionDAG &DAG) const{
10489 DebugLoc dl = Op.getDebugLoc();
10491 // Go ahead and emit the fence on x86-64 even if we asked for no-sse2.
10492 // There isn't any reason to disable it if the target processor supports it.
10493 if (!Subtarget->hasSSE2() && !Subtarget->is64Bit()) {
10494 SDValue Chain = Op.getOperand(0);
10495 SDValue Zero = DAG.getConstant(0, MVT::i32);
10497 DAG.getRegister(X86::ESP, MVT::i32), // Base
10498 DAG.getTargetConstant(1, MVT::i8), // Scale
10499 DAG.getRegister(0, MVT::i32), // Index
10500 DAG.getTargetConstant(0, MVT::i32), // Disp
10501 DAG.getRegister(0, MVT::i32), // Segment.
10506 DAG.getMachineNode(X86::OR32mrLocked, dl, MVT::Other, Ops,
10507 array_lengthof(Ops));
10508 return SDValue(Res, 0);
10511 unsigned isDev = cast<ConstantSDNode>(Op.getOperand(5))->getZExtValue();
10513 return DAG.getNode(X86ISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0));
10515 unsigned Op1 = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
10516 unsigned Op2 = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue();
10517 unsigned Op3 = cast<ConstantSDNode>(Op.getOperand(3))->getZExtValue();
10518 unsigned Op4 = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue();
10520 // def : Pat<(membarrier (i8 0), (i8 0), (i8 0), (i8 1), (i8 1)), (SFENCE)>;
10521 if (!Op1 && !Op2 && !Op3 && Op4)
10522 return DAG.getNode(X86ISD::SFENCE, dl, MVT::Other, Op.getOperand(0));
10524 // def : Pat<(membarrier (i8 1), (i8 0), (i8 0), (i8 0), (i8 1)), (LFENCE)>;
10525 if (Op1 && !Op2 && !Op3 && !Op4)
10526 return DAG.getNode(X86ISD::LFENCE, dl, MVT::Other, Op.getOperand(0));
10528 // def : Pat<(membarrier (i8 imm), (i8 imm), (i8 imm), (i8 imm), (i8 1)),
10530 return DAG.getNode(X86ISD::MFENCE, dl, MVT::Other, Op.getOperand(0));
10533 SDValue X86TargetLowering::LowerATOMIC_FENCE(SDValue Op,
10534 SelectionDAG &DAG) const {
10535 DebugLoc dl = Op.getDebugLoc();
10536 AtomicOrdering FenceOrdering = static_cast<AtomicOrdering>(
10537 cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue());
10538 SynchronizationScope FenceScope = static_cast<SynchronizationScope>(
10539 cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue());
10541 // The only fence that needs an instruction is a sequentially-consistent
10542 // cross-thread fence.
10543 if (FenceOrdering == SequentiallyConsistent && FenceScope == CrossThread) {
10544 // Use mfence if we have SSE2 or we're on x86-64 (even if we asked for
10545 // no-sse2). There isn't any reason to disable it if the target processor
10547 if (Subtarget->hasSSE2() || Subtarget->is64Bit())
10548 return DAG.getNode(X86ISD::MFENCE, dl, MVT::Other, Op.getOperand(0));
10550 SDValue Chain = Op.getOperand(0);
10551 SDValue Zero = DAG.getConstant(0, MVT::i32);
10553 DAG.getRegister(X86::ESP, MVT::i32), // Base
10554 DAG.getTargetConstant(1, MVT::i8), // Scale
10555 DAG.getRegister(0, MVT::i32), // Index
10556 DAG.getTargetConstant(0, MVT::i32), // Disp
10557 DAG.getRegister(0, MVT::i32), // Segment.
10562 DAG.getMachineNode(X86::OR32mrLocked, dl, MVT::Other, Ops,
10563 array_lengthof(Ops));
10564 return SDValue(Res, 0);
10567 // MEMBARRIER is a compiler barrier; it codegens to a no-op.
10568 return DAG.getNode(X86ISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0));
10572 SDValue X86TargetLowering::LowerCMP_SWAP(SDValue Op, SelectionDAG &DAG) const {
10573 EVT T = Op.getValueType();
10574 DebugLoc DL = Op.getDebugLoc();
10577 switch(T.getSimpleVT().SimpleTy) {
10578 default: llvm_unreachable("Invalid value type!");
10579 case MVT::i8: Reg = X86::AL; size = 1; break;
10580 case MVT::i16: Reg = X86::AX; size = 2; break;
10581 case MVT::i32: Reg = X86::EAX; size = 4; break;
10583 assert(Subtarget->is64Bit() && "Node not type legal!");
10584 Reg = X86::RAX; size = 8;
10587 SDValue cpIn = DAG.getCopyToReg(Op.getOperand(0), DL, Reg,
10588 Op.getOperand(2), SDValue());
10589 SDValue Ops[] = { cpIn.getValue(0),
10592 DAG.getTargetConstant(size, MVT::i8),
10593 cpIn.getValue(1) };
10594 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
10595 MachineMemOperand *MMO = cast<AtomicSDNode>(Op)->getMemOperand();
10596 SDValue Result = DAG.getMemIntrinsicNode(X86ISD::LCMPXCHG_DAG, DL, Tys,
10599 DAG.getCopyFromReg(Result.getValue(0), DL, Reg, T, Result.getValue(1));
10603 SDValue X86TargetLowering::LowerREADCYCLECOUNTER(SDValue Op,
10604 SelectionDAG &DAG) const {
10605 assert(Subtarget->is64Bit() && "Result not type legalized?");
10606 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
10607 SDValue TheChain = Op.getOperand(0);
10608 DebugLoc dl = Op.getDebugLoc();
10609 SDValue rd = DAG.getNode(X86ISD::RDTSC_DAG, dl, Tys, &TheChain, 1);
10610 SDValue rax = DAG.getCopyFromReg(rd, dl, X86::RAX, MVT::i64, rd.getValue(1));
10611 SDValue rdx = DAG.getCopyFromReg(rax.getValue(1), dl, X86::RDX, MVT::i64,
10613 SDValue Tmp = DAG.getNode(ISD::SHL, dl, MVT::i64, rdx,
10614 DAG.getConstant(32, MVT::i8));
10616 DAG.getNode(ISD::OR, dl, MVT::i64, rax, Tmp),
10619 return DAG.getMergeValues(Ops, 2, dl);
10622 SDValue X86TargetLowering::LowerBITCAST(SDValue Op,
10623 SelectionDAG &DAG) const {
10624 EVT SrcVT = Op.getOperand(0).getValueType();
10625 EVT DstVT = Op.getValueType();
10626 assert(Subtarget->is64Bit() && !Subtarget->hasSSE2() &&
10627 Subtarget->hasMMX() && "Unexpected custom BITCAST");
10628 assert((DstVT == MVT::i64 ||
10629 (DstVT.isVector() && DstVT.getSizeInBits()==64)) &&
10630 "Unexpected custom BITCAST");
10631 // i64 <=> MMX conversions are Legal.
10632 if (SrcVT==MVT::i64 && DstVT.isVector())
10634 if (DstVT==MVT::i64 && SrcVT.isVector())
10636 // MMX <=> MMX conversions are Legal.
10637 if (SrcVT.isVector() && DstVT.isVector())
10639 // All other conversions need to be expanded.
10643 SDValue X86TargetLowering::LowerLOAD_SUB(SDValue Op, SelectionDAG &DAG) const {
10644 SDNode *Node = Op.getNode();
10645 DebugLoc dl = Node->getDebugLoc();
10646 EVT T = Node->getValueType(0);
10647 SDValue negOp = DAG.getNode(ISD::SUB, dl, T,
10648 DAG.getConstant(0, T), Node->getOperand(2));
10649 return DAG.getAtomic(ISD::ATOMIC_LOAD_ADD, dl,
10650 cast<AtomicSDNode>(Node)->getMemoryVT(),
10651 Node->getOperand(0),
10652 Node->getOperand(1), negOp,
10653 cast<AtomicSDNode>(Node)->getSrcValue(),
10654 cast<AtomicSDNode>(Node)->getAlignment(),
10655 cast<AtomicSDNode>(Node)->getOrdering(),
10656 cast<AtomicSDNode>(Node)->getSynchScope());
10659 static SDValue LowerATOMIC_STORE(SDValue Op, SelectionDAG &DAG) {
10660 SDNode *Node = Op.getNode();
10661 DebugLoc dl = Node->getDebugLoc();
10662 EVT VT = cast<AtomicSDNode>(Node)->getMemoryVT();
10664 // Convert seq_cst store -> xchg
10665 // Convert wide store -> swap (-> cmpxchg8b/cmpxchg16b)
10666 // FIXME: On 32-bit, store -> fist or movq would be more efficient
10667 // (The only way to get a 16-byte store is cmpxchg16b)
10668 // FIXME: 16-byte ATOMIC_SWAP isn't actually hooked up at the moment.
10669 if (cast<AtomicSDNode>(Node)->getOrdering() == SequentiallyConsistent ||
10670 !DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
10671 SDValue Swap = DAG.getAtomic(ISD::ATOMIC_SWAP, dl,
10672 cast<AtomicSDNode>(Node)->getMemoryVT(),
10673 Node->getOperand(0),
10674 Node->getOperand(1), Node->getOperand(2),
10675 cast<AtomicSDNode>(Node)->getMemOperand(),
10676 cast<AtomicSDNode>(Node)->getOrdering(),
10677 cast<AtomicSDNode>(Node)->getSynchScope());
10678 return Swap.getValue(1);
10680 // Other atomic stores have a simple pattern.
10684 static SDValue LowerADDC_ADDE_SUBC_SUBE(SDValue Op, SelectionDAG &DAG) {
10685 EVT VT = Op.getNode()->getValueType(0);
10687 // Let legalize expand this if it isn't a legal type yet.
10688 if (!DAG.getTargetLoweringInfo().isTypeLegal(VT))
10691 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
10694 bool ExtraOp = false;
10695 switch (Op.getOpcode()) {
10696 default: llvm_unreachable("Invalid code");
10697 case ISD::ADDC: Opc = X86ISD::ADD; break;
10698 case ISD::ADDE: Opc = X86ISD::ADC; ExtraOp = true; break;
10699 case ISD::SUBC: Opc = X86ISD::SUB; break;
10700 case ISD::SUBE: Opc = X86ISD::SBB; ExtraOp = true; break;
10704 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
10706 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
10707 Op.getOperand(1), Op.getOperand(2));
10710 /// LowerOperation - Provide custom lowering hooks for some operations.
10712 SDValue X86TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
10713 switch (Op.getOpcode()) {
10714 default: llvm_unreachable("Should not custom lower this!");
10715 case ISD::SIGN_EXTEND_INREG: return LowerSIGN_EXTEND_INREG(Op,DAG);
10716 case ISD::MEMBARRIER: return LowerMEMBARRIER(Op,DAG);
10717 case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op,DAG);
10718 case ISD::ATOMIC_CMP_SWAP: return LowerCMP_SWAP(Op,DAG);
10719 case ISD::ATOMIC_LOAD_SUB: return LowerLOAD_SUB(Op,DAG);
10720 case ISD::ATOMIC_STORE: return LowerATOMIC_STORE(Op,DAG);
10721 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG);
10722 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
10723 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
10724 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
10725 case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
10726 case ISD::EXTRACT_SUBVECTOR: return LowerEXTRACT_SUBVECTOR(Op, DAG);
10727 case ISD::INSERT_SUBVECTOR: return LowerINSERT_SUBVECTOR(Op, DAG);
10728 case ISD::SCALAR_TO_VECTOR: return LowerSCALAR_TO_VECTOR(Op, DAG);
10729 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
10730 case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
10731 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
10732 case ISD::ExternalSymbol: return LowerExternalSymbol(Op, DAG);
10733 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
10734 case ISD::SHL_PARTS:
10735 case ISD::SRA_PARTS:
10736 case ISD::SRL_PARTS: return LowerShiftParts(Op, DAG);
10737 case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
10738 case ISD::UINT_TO_FP: return LowerUINT_TO_FP(Op, DAG);
10739 case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
10740 case ISD::FP_TO_UINT: return LowerFP_TO_UINT(Op, DAG);
10741 case ISD::FABS: return LowerFABS(Op, DAG);
10742 case ISD::FNEG: return LowerFNEG(Op, DAG);
10743 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
10744 case ISD::FGETSIGN: return LowerFGETSIGN(Op, DAG);
10745 case ISD::SETCC: return LowerSETCC(Op, DAG);
10746 case ISD::SELECT: return LowerSELECT(Op, DAG);
10747 case ISD::BRCOND: return LowerBRCOND(Op, DAG);
10748 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
10749 case ISD::VASTART: return LowerVASTART(Op, DAG);
10750 case ISD::VAARG: return LowerVAARG(Op, DAG);
10751 case ISD::VACOPY: return LowerVACOPY(Op, DAG);
10752 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
10753 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
10754 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
10755 case ISD::FRAME_TO_ARGS_OFFSET:
10756 return LowerFRAME_TO_ARGS_OFFSET(Op, DAG);
10757 case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
10758 case ISD::EH_RETURN: return LowerEH_RETURN(Op, DAG);
10759 case ISD::INIT_TRAMPOLINE: return LowerINIT_TRAMPOLINE(Op, DAG);
10760 case ISD::ADJUST_TRAMPOLINE: return LowerADJUST_TRAMPOLINE(Op, DAG);
10761 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
10762 case ISD::CTLZ: return LowerCTLZ(Op, DAG);
10763 case ISD::CTLZ_ZERO_UNDEF: return LowerCTLZ_ZERO_UNDEF(Op, DAG);
10764 case ISD::CTTZ: return LowerCTTZ(Op, DAG);
10765 case ISD::MUL: return LowerMUL(Op, DAG);
10768 case ISD::SHL: return LowerShift(Op, DAG);
10774 case ISD::UMULO: return LowerXALUO(Op, DAG);
10775 case ISD::READCYCLECOUNTER: return LowerREADCYCLECOUNTER(Op, DAG);
10776 case ISD::BITCAST: return LowerBITCAST(Op, DAG);
10780 case ISD::SUBE: return LowerADDC_ADDE_SUBC_SUBE(Op, DAG);
10781 case ISD::ADD: return LowerADD(Op, DAG);
10782 case ISD::SUB: return LowerSUB(Op, DAG);
10786 static void ReplaceATOMIC_LOAD(SDNode *Node,
10787 SmallVectorImpl<SDValue> &Results,
10788 SelectionDAG &DAG) {
10789 DebugLoc dl = Node->getDebugLoc();
10790 EVT VT = cast<AtomicSDNode>(Node)->getMemoryVT();
10792 // Convert wide load -> cmpxchg8b/cmpxchg16b
10793 // FIXME: On 32-bit, load -> fild or movq would be more efficient
10794 // (The only way to get a 16-byte load is cmpxchg16b)
10795 // FIXME: 16-byte ATOMIC_CMP_SWAP isn't actually hooked up at the moment.
10796 SDValue Zero = DAG.getConstant(0, VT);
10797 SDValue Swap = DAG.getAtomic(ISD::ATOMIC_CMP_SWAP, dl, VT,
10798 Node->getOperand(0),
10799 Node->getOperand(1), Zero, Zero,
10800 cast<AtomicSDNode>(Node)->getMemOperand(),
10801 cast<AtomicSDNode>(Node)->getOrdering(),
10802 cast<AtomicSDNode>(Node)->getSynchScope());
10803 Results.push_back(Swap.getValue(0));
10804 Results.push_back(Swap.getValue(1));
10807 void X86TargetLowering::
10808 ReplaceATOMIC_BINARY_64(SDNode *Node, SmallVectorImpl<SDValue>&Results,
10809 SelectionDAG &DAG, unsigned NewOp) const {
10810 DebugLoc dl = Node->getDebugLoc();
10811 assert (Node->getValueType(0) == MVT::i64 &&
10812 "Only know how to expand i64 atomics");
10814 SDValue Chain = Node->getOperand(0);
10815 SDValue In1 = Node->getOperand(1);
10816 SDValue In2L = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
10817 Node->getOperand(2), DAG.getIntPtrConstant(0));
10818 SDValue In2H = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
10819 Node->getOperand(2), DAG.getIntPtrConstant(1));
10820 SDValue Ops[] = { Chain, In1, In2L, In2H };
10821 SDVTList Tys = DAG.getVTList(MVT::i32, MVT::i32, MVT::Other);
10823 DAG.getMemIntrinsicNode(NewOp, dl, Tys, Ops, 4, MVT::i64,
10824 cast<MemSDNode>(Node)->getMemOperand());
10825 SDValue OpsF[] = { Result.getValue(0), Result.getValue(1)};
10826 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, OpsF, 2));
10827 Results.push_back(Result.getValue(2));
10830 /// ReplaceNodeResults - Replace a node with an illegal result type
10831 /// with a new node built out of custom code.
10832 void X86TargetLowering::ReplaceNodeResults(SDNode *N,
10833 SmallVectorImpl<SDValue>&Results,
10834 SelectionDAG &DAG) const {
10835 DebugLoc dl = N->getDebugLoc();
10836 switch (N->getOpcode()) {
10838 llvm_unreachable("Do not know how to custom type legalize this operation!");
10839 case ISD::SIGN_EXTEND_INREG:
10844 // We don't want to expand or promote these.
10846 case ISD::FP_TO_SINT: {
10847 std::pair<SDValue,SDValue> Vals =
10848 FP_TO_INTHelper(SDValue(N, 0), DAG, true);
10849 SDValue FIST = Vals.first, StackSlot = Vals.second;
10850 if (FIST.getNode() != 0) {
10851 EVT VT = N->getValueType(0);
10852 // Return a load from the stack slot.
10853 Results.push_back(DAG.getLoad(VT, dl, FIST, StackSlot,
10854 MachinePointerInfo(),
10855 false, false, false, 0));
10859 case ISD::READCYCLECOUNTER: {
10860 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
10861 SDValue TheChain = N->getOperand(0);
10862 SDValue rd = DAG.getNode(X86ISD::RDTSC_DAG, dl, Tys, &TheChain, 1);
10863 SDValue eax = DAG.getCopyFromReg(rd, dl, X86::EAX, MVT::i32,
10865 SDValue edx = DAG.getCopyFromReg(eax.getValue(1), dl, X86::EDX, MVT::i32,
10867 // Use a buildpair to merge the two 32-bit values into a 64-bit one.
10868 SDValue Ops[] = { eax, edx };
10869 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Ops, 2));
10870 Results.push_back(edx.getValue(1));
10873 case ISD::ATOMIC_CMP_SWAP: {
10874 EVT T = N->getValueType(0);
10875 assert((T == MVT::i64 || T == MVT::i128) && "can only expand cmpxchg pair");
10876 bool Regs64bit = T == MVT::i128;
10877 EVT HalfT = Regs64bit ? MVT::i64 : MVT::i32;
10878 SDValue cpInL, cpInH;
10879 cpInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(2),
10880 DAG.getConstant(0, HalfT));
10881 cpInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(2),
10882 DAG.getConstant(1, HalfT));
10883 cpInL = DAG.getCopyToReg(N->getOperand(0), dl,
10884 Regs64bit ? X86::RAX : X86::EAX,
10886 cpInH = DAG.getCopyToReg(cpInL.getValue(0), dl,
10887 Regs64bit ? X86::RDX : X86::EDX,
10888 cpInH, cpInL.getValue(1));
10889 SDValue swapInL, swapInH;
10890 swapInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(3),
10891 DAG.getConstant(0, HalfT));
10892 swapInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(3),
10893 DAG.getConstant(1, HalfT));
10894 swapInL = DAG.getCopyToReg(cpInH.getValue(0), dl,
10895 Regs64bit ? X86::RBX : X86::EBX,
10896 swapInL, cpInH.getValue(1));
10897 swapInH = DAG.getCopyToReg(swapInL.getValue(0), dl,
10898 Regs64bit ? X86::RCX : X86::ECX,
10899 swapInH, swapInL.getValue(1));
10900 SDValue Ops[] = { swapInH.getValue(0),
10902 swapInH.getValue(1) };
10903 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
10904 MachineMemOperand *MMO = cast<AtomicSDNode>(N)->getMemOperand();
10905 unsigned Opcode = Regs64bit ? X86ISD::LCMPXCHG16_DAG :
10906 X86ISD::LCMPXCHG8_DAG;
10907 SDValue Result = DAG.getMemIntrinsicNode(Opcode, dl, Tys,
10909 SDValue cpOutL = DAG.getCopyFromReg(Result.getValue(0), dl,
10910 Regs64bit ? X86::RAX : X86::EAX,
10911 HalfT, Result.getValue(1));
10912 SDValue cpOutH = DAG.getCopyFromReg(cpOutL.getValue(1), dl,
10913 Regs64bit ? X86::RDX : X86::EDX,
10914 HalfT, cpOutL.getValue(2));
10915 SDValue OpsF[] = { cpOutL.getValue(0), cpOutH.getValue(0)};
10916 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, T, OpsF, 2));
10917 Results.push_back(cpOutH.getValue(1));
10920 case ISD::ATOMIC_LOAD_ADD:
10921 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMADD64_DAG);
10923 case ISD::ATOMIC_LOAD_AND:
10924 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMAND64_DAG);
10926 case ISD::ATOMIC_LOAD_NAND:
10927 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMNAND64_DAG);
10929 case ISD::ATOMIC_LOAD_OR:
10930 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMOR64_DAG);
10932 case ISD::ATOMIC_LOAD_SUB:
10933 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMSUB64_DAG);
10935 case ISD::ATOMIC_LOAD_XOR:
10936 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMXOR64_DAG);
10938 case ISD::ATOMIC_SWAP:
10939 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMSWAP64_DAG);
10941 case ISD::ATOMIC_LOAD:
10942 ReplaceATOMIC_LOAD(N, Results, DAG);
10946 const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const {
10948 default: return NULL;
10949 case X86ISD::BSF: return "X86ISD::BSF";
10950 case X86ISD::BSR: return "X86ISD::BSR";
10951 case X86ISD::SHLD: return "X86ISD::SHLD";
10952 case X86ISD::SHRD: return "X86ISD::SHRD";
10953 case X86ISD::FAND: return "X86ISD::FAND";
10954 case X86ISD::FOR: return "X86ISD::FOR";
10955 case X86ISD::FXOR: return "X86ISD::FXOR";
10956 case X86ISD::FSRL: return "X86ISD::FSRL";
10957 case X86ISD::FILD: return "X86ISD::FILD";
10958 case X86ISD::FILD_FLAG: return "X86ISD::FILD_FLAG";
10959 case X86ISD::FP_TO_INT16_IN_MEM: return "X86ISD::FP_TO_INT16_IN_MEM";
10960 case X86ISD::FP_TO_INT32_IN_MEM: return "X86ISD::FP_TO_INT32_IN_MEM";
10961 case X86ISD::FP_TO_INT64_IN_MEM: return "X86ISD::FP_TO_INT64_IN_MEM";
10962 case X86ISD::FLD: return "X86ISD::FLD";
10963 case X86ISD::FST: return "X86ISD::FST";
10964 case X86ISD::CALL: return "X86ISD::CALL";
10965 case X86ISD::RDTSC_DAG: return "X86ISD::RDTSC_DAG";
10966 case X86ISD::BT: return "X86ISD::BT";
10967 case X86ISD::CMP: return "X86ISD::CMP";
10968 case X86ISD::COMI: return "X86ISD::COMI";
10969 case X86ISD::UCOMI: return "X86ISD::UCOMI";
10970 case X86ISD::SETCC: return "X86ISD::SETCC";
10971 case X86ISD::SETCC_CARRY: return "X86ISD::SETCC_CARRY";
10972 case X86ISD::FSETCCsd: return "X86ISD::FSETCCsd";
10973 case X86ISD::FSETCCss: return "X86ISD::FSETCCss";
10974 case X86ISD::CMOV: return "X86ISD::CMOV";
10975 case X86ISD::BRCOND: return "X86ISD::BRCOND";
10976 case X86ISD::RET_FLAG: return "X86ISD::RET_FLAG";
10977 case X86ISD::REP_STOS: return "X86ISD::REP_STOS";
10978 case X86ISD::REP_MOVS: return "X86ISD::REP_MOVS";
10979 case X86ISD::GlobalBaseReg: return "X86ISD::GlobalBaseReg";
10980 case X86ISD::Wrapper: return "X86ISD::Wrapper";
10981 case X86ISD::WrapperRIP: return "X86ISD::WrapperRIP";
10982 case X86ISD::PEXTRB: return "X86ISD::PEXTRB";
10983 case X86ISD::PEXTRW: return "X86ISD::PEXTRW";
10984 case X86ISD::INSERTPS: return "X86ISD::INSERTPS";
10985 case X86ISD::PINSRB: return "X86ISD::PINSRB";
10986 case X86ISD::PINSRW: return "X86ISD::PINSRW";
10987 case X86ISD::PSHUFB: return "X86ISD::PSHUFB";
10988 case X86ISD::ANDNP: return "X86ISD::ANDNP";
10989 case X86ISD::PSIGN: return "X86ISD::PSIGN";
10990 case X86ISD::BLENDV: return "X86ISD::BLENDV";
10991 case X86ISD::HADD: return "X86ISD::HADD";
10992 case X86ISD::HSUB: return "X86ISD::HSUB";
10993 case X86ISD::FHADD: return "X86ISD::FHADD";
10994 case X86ISD::FHSUB: return "X86ISD::FHSUB";
10995 case X86ISD::FMAX: return "X86ISD::FMAX";
10996 case X86ISD::FMIN: return "X86ISD::FMIN";
10997 case X86ISD::FRSQRT: return "X86ISD::FRSQRT";
10998 case X86ISD::FRCP: return "X86ISD::FRCP";
10999 case X86ISD::TLSADDR: return "X86ISD::TLSADDR";
11000 case X86ISD::TLSCALL: return "X86ISD::TLSCALL";
11001 case X86ISD::EH_RETURN: return "X86ISD::EH_RETURN";
11002 case X86ISD::TC_RETURN: return "X86ISD::TC_RETURN";
11003 case X86ISD::FNSTCW16m: return "X86ISD::FNSTCW16m";
11004 case X86ISD::LCMPXCHG_DAG: return "X86ISD::LCMPXCHG_DAG";
11005 case X86ISD::LCMPXCHG8_DAG: return "X86ISD::LCMPXCHG8_DAG";
11006 case X86ISD::ATOMADD64_DAG: return "X86ISD::ATOMADD64_DAG";
11007 case X86ISD::ATOMSUB64_DAG: return "X86ISD::ATOMSUB64_DAG";
11008 case X86ISD::ATOMOR64_DAG: return "X86ISD::ATOMOR64_DAG";
11009 case X86ISD::ATOMXOR64_DAG: return "X86ISD::ATOMXOR64_DAG";
11010 case X86ISD::ATOMAND64_DAG: return "X86ISD::ATOMAND64_DAG";
11011 case X86ISD::ATOMNAND64_DAG: return "X86ISD::ATOMNAND64_DAG";
11012 case X86ISD::VZEXT_MOVL: return "X86ISD::VZEXT_MOVL";
11013 case X86ISD::VZEXT_LOAD: return "X86ISD::VZEXT_LOAD";
11014 case X86ISD::VSHLDQ: return "X86ISD::VSHLDQ";
11015 case X86ISD::VSRLDQ: return "X86ISD::VSRLDQ";
11016 case X86ISD::VSHL: return "X86ISD::VSHL";
11017 case X86ISD::VSRL: return "X86ISD::VSRL";
11018 case X86ISD::VSRA: return "X86ISD::VSRA";
11019 case X86ISD::VSHLI: return "X86ISD::VSHLI";
11020 case X86ISD::VSRLI: return "X86ISD::VSRLI";
11021 case X86ISD::VSRAI: return "X86ISD::VSRAI";
11022 case X86ISD::CMPP: return "X86ISD::CMPP";
11023 case X86ISD::PCMPEQ: return "X86ISD::PCMPEQ";
11024 case X86ISD::PCMPGT: return "X86ISD::PCMPGT";
11025 case X86ISD::ADD: return "X86ISD::ADD";
11026 case X86ISD::SUB: return "X86ISD::SUB";
11027 case X86ISD::ADC: return "X86ISD::ADC";
11028 case X86ISD::SBB: return "X86ISD::SBB";
11029 case X86ISD::SMUL: return "X86ISD::SMUL";
11030 case X86ISD::UMUL: return "X86ISD::UMUL";
11031 case X86ISD::INC: return "X86ISD::INC";
11032 case X86ISD::DEC: return "X86ISD::DEC";
11033 case X86ISD::OR: return "X86ISD::OR";
11034 case X86ISD::XOR: return "X86ISD::XOR";
11035 case X86ISD::AND: return "X86ISD::AND";
11036 case X86ISD::ANDN: return "X86ISD::ANDN";
11037 case X86ISD::BLSI: return "X86ISD::BLSI";
11038 case X86ISD::BLSMSK: return "X86ISD::BLSMSK";
11039 case X86ISD::BLSR: return "X86ISD::BLSR";
11040 case X86ISD::MUL_IMM: return "X86ISD::MUL_IMM";
11041 case X86ISD::PTEST: return "X86ISD::PTEST";
11042 case X86ISD::TESTP: return "X86ISD::TESTP";
11043 case X86ISD::PALIGN: return "X86ISD::PALIGN";
11044 case X86ISD::PSHUFD: return "X86ISD::PSHUFD";
11045 case X86ISD::PSHUFHW: return "X86ISD::PSHUFHW";
11046 case X86ISD::PSHUFLW: return "X86ISD::PSHUFLW";
11047 case X86ISD::SHUFP: return "X86ISD::SHUFP";
11048 case X86ISD::MOVLHPS: return "X86ISD::MOVLHPS";
11049 case X86ISD::MOVLHPD: return "X86ISD::MOVLHPD";
11050 case X86ISD::MOVHLPS: return "X86ISD::MOVHLPS";
11051 case X86ISD::MOVLPS: return "X86ISD::MOVLPS";
11052 case X86ISD::MOVLPD: return "X86ISD::MOVLPD";
11053 case X86ISD::MOVDDUP: return "X86ISD::MOVDDUP";
11054 case X86ISD::MOVSHDUP: return "X86ISD::MOVSHDUP";
11055 case X86ISD::MOVSLDUP: return "X86ISD::MOVSLDUP";
11056 case X86ISD::MOVSD: return "X86ISD::MOVSD";
11057 case X86ISD::MOVSS: return "X86ISD::MOVSS";
11058 case X86ISD::UNPCKL: return "X86ISD::UNPCKL";
11059 case X86ISD::UNPCKH: return "X86ISD::UNPCKH";
11060 case X86ISD::VBROADCAST: return "X86ISD::VBROADCAST";
11061 case X86ISD::VPERMILP: return "X86ISD::VPERMILP";
11062 case X86ISD::VPERM2X128: return "X86ISD::VPERM2X128";
11063 case X86ISD::PMULUDQ: return "X86ISD::PMULUDQ";
11064 case X86ISD::VASTART_SAVE_XMM_REGS: return "X86ISD::VASTART_SAVE_XMM_REGS";
11065 case X86ISD::VAARG_64: return "X86ISD::VAARG_64";
11066 case X86ISD::WIN_ALLOCA: return "X86ISD::WIN_ALLOCA";
11067 case X86ISD::MEMBARRIER: return "X86ISD::MEMBARRIER";
11068 case X86ISD::SEG_ALLOCA: return "X86ISD::SEG_ALLOCA";
11072 // isLegalAddressingMode - Return true if the addressing mode represented
11073 // by AM is legal for this target, for a load/store of the specified type.
11074 bool X86TargetLowering::isLegalAddressingMode(const AddrMode &AM,
11076 // X86 supports extremely general addressing modes.
11077 CodeModel::Model M = getTargetMachine().getCodeModel();
11078 Reloc::Model R = getTargetMachine().getRelocationModel();
11080 // X86 allows a sign-extended 32-bit immediate field as a displacement.
11081 if (!X86::isOffsetSuitableForCodeModel(AM.BaseOffs, M, AM.BaseGV != NULL))
11086 Subtarget->ClassifyGlobalReference(AM.BaseGV, getTargetMachine());
11088 // If a reference to this global requires an extra load, we can't fold it.
11089 if (isGlobalStubReference(GVFlags))
11092 // If BaseGV requires a register for the PIC base, we cannot also have a
11093 // BaseReg specified.
11094 if (AM.HasBaseReg && isGlobalRelativeToPICBase(GVFlags))
11097 // If lower 4G is not available, then we must use rip-relative addressing.
11098 if ((M != CodeModel::Small || R != Reloc::Static) &&
11099 Subtarget->is64Bit() && (AM.BaseOffs || AM.Scale > 1))
11103 switch (AM.Scale) {
11109 // These scales always work.
11114 // These scales are formed with basereg+scalereg. Only accept if there is
11119 default: // Other stuff never works.
11127 bool X86TargetLowering::isTruncateFree(Type *Ty1, Type *Ty2) const {
11128 if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy())
11130 unsigned NumBits1 = Ty1->getPrimitiveSizeInBits();
11131 unsigned NumBits2 = Ty2->getPrimitiveSizeInBits();
11132 if (NumBits1 <= NumBits2)
11137 bool X86TargetLowering::isTruncateFree(EVT VT1, EVT VT2) const {
11138 if (!VT1.isInteger() || !VT2.isInteger())
11140 unsigned NumBits1 = VT1.getSizeInBits();
11141 unsigned NumBits2 = VT2.getSizeInBits();
11142 if (NumBits1 <= NumBits2)
11147 bool X86TargetLowering::isZExtFree(Type *Ty1, Type *Ty2) const {
11148 // x86-64 implicitly zero-extends 32-bit results in 64-bit registers.
11149 return Ty1->isIntegerTy(32) && Ty2->isIntegerTy(64) && Subtarget->is64Bit();
11152 bool X86TargetLowering::isZExtFree(EVT VT1, EVT VT2) const {
11153 // x86-64 implicitly zero-extends 32-bit results in 64-bit registers.
11154 return VT1 == MVT::i32 && VT2 == MVT::i64 && Subtarget->is64Bit();
11157 bool X86TargetLowering::isNarrowingProfitable(EVT VT1, EVT VT2) const {
11158 // i16 instructions are longer (0x66 prefix) and potentially slower.
11159 return !(VT1 == MVT::i32 && VT2 == MVT::i16);
11162 /// isShuffleMaskLegal - Targets can use this to indicate that they only
11163 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
11164 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
11165 /// are assumed to be legal.
11167 X86TargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &M,
11169 // Very little shuffling can be done for 64-bit vectors right now.
11170 if (VT.getSizeInBits() == 64)
11173 // FIXME: pshufb, blends, shifts.
11174 return (VT.getVectorNumElements() == 2 ||
11175 ShuffleVectorSDNode::isSplatMask(&M[0], VT) ||
11176 isMOVLMask(M, VT) ||
11177 isSHUFPMask(M, VT, Subtarget->hasAVX()) ||
11178 isPSHUFDMask(M, VT) ||
11179 isPSHUFHWMask(M, VT) ||
11180 isPSHUFLWMask(M, VT) ||
11181 isPALIGNRMask(M, VT, Subtarget) ||
11182 isUNPCKLMask(M, VT, Subtarget->hasAVX2()) ||
11183 isUNPCKHMask(M, VT, Subtarget->hasAVX2()) ||
11184 isUNPCKL_v_undef_Mask(M, VT, Subtarget->hasAVX2()) ||
11185 isUNPCKH_v_undef_Mask(M, VT, Subtarget->hasAVX2()));
11189 X86TargetLowering::isVectorClearMaskLegal(const SmallVectorImpl<int> &Mask,
11191 unsigned NumElts = VT.getVectorNumElements();
11192 // FIXME: This collection of masks seems suspect.
11195 if (NumElts == 4 && VT.getSizeInBits() == 128) {
11196 return (isMOVLMask(Mask, VT) ||
11197 isCommutedMOVLMask(Mask, VT, true) ||
11198 isSHUFPMask(Mask, VT, Subtarget->hasAVX()) ||
11199 isSHUFPMask(Mask, VT, Subtarget->hasAVX(), /* Commuted */ true));
11204 //===----------------------------------------------------------------------===//
11205 // X86 Scheduler Hooks
11206 //===----------------------------------------------------------------------===//
11208 // private utility function
11209 MachineBasicBlock *
11210 X86TargetLowering::EmitAtomicBitwiseWithCustomInserter(MachineInstr *bInstr,
11211 MachineBasicBlock *MBB,
11218 TargetRegisterClass *RC,
11219 bool invSrc) const {
11220 // For the atomic bitwise operator, we generate
11223 // ld t1 = [bitinstr.addr]
11224 // op t2 = t1, [bitinstr.val]
11226 // lcs dest = [bitinstr.addr], t2 [EAX is implicit]
11228 // fallthrough -->nextMBB
11229 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11230 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
11231 MachineFunction::iterator MBBIter = MBB;
11234 /// First build the CFG
11235 MachineFunction *F = MBB->getParent();
11236 MachineBasicBlock *thisMBB = MBB;
11237 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
11238 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
11239 F->insert(MBBIter, newMBB);
11240 F->insert(MBBIter, nextMBB);
11242 // Transfer the remainder of thisMBB and its successor edges to nextMBB.
11243 nextMBB->splice(nextMBB->begin(), thisMBB,
11244 llvm::next(MachineBasicBlock::iterator(bInstr)),
11246 nextMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
11248 // Update thisMBB to fall through to newMBB
11249 thisMBB->addSuccessor(newMBB);
11251 // newMBB jumps to itself and fall through to nextMBB
11252 newMBB->addSuccessor(nextMBB);
11253 newMBB->addSuccessor(newMBB);
11255 // Insert instructions into newMBB based on incoming instruction
11256 assert(bInstr->getNumOperands() < X86::AddrNumOperands + 4 &&
11257 "unexpected number of operands");
11258 DebugLoc dl = bInstr->getDebugLoc();
11259 MachineOperand& destOper = bInstr->getOperand(0);
11260 MachineOperand* argOpers[2 + X86::AddrNumOperands];
11261 int numArgs = bInstr->getNumOperands() - 1;
11262 for (int i=0; i < numArgs; ++i)
11263 argOpers[i] = &bInstr->getOperand(i+1);
11265 // x86 address has 4 operands: base, index, scale, and displacement
11266 int lastAddrIndx = X86::AddrNumOperands - 1; // [0,3]
11267 int valArgIndx = lastAddrIndx + 1;
11269 unsigned t1 = F->getRegInfo().createVirtualRegister(RC);
11270 MachineInstrBuilder MIB = BuildMI(newMBB, dl, TII->get(LoadOpc), t1);
11271 for (int i=0; i <= lastAddrIndx; ++i)
11272 (*MIB).addOperand(*argOpers[i]);
11274 unsigned tt = F->getRegInfo().createVirtualRegister(RC);
11276 MIB = BuildMI(newMBB, dl, TII->get(notOpc), tt).addReg(t1);
11281 unsigned t2 = F->getRegInfo().createVirtualRegister(RC);
11282 assert((argOpers[valArgIndx]->isReg() ||
11283 argOpers[valArgIndx]->isImm()) &&
11284 "invalid operand");
11285 if (argOpers[valArgIndx]->isReg())
11286 MIB = BuildMI(newMBB, dl, TII->get(regOpc), t2);
11288 MIB = BuildMI(newMBB, dl, TII->get(immOpc), t2);
11290 (*MIB).addOperand(*argOpers[valArgIndx]);
11292 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), EAXreg);
11295 MIB = BuildMI(newMBB, dl, TII->get(CXchgOpc));
11296 for (int i=0; i <= lastAddrIndx; ++i)
11297 (*MIB).addOperand(*argOpers[i]);
11299 assert(bInstr->hasOneMemOperand() && "Unexpected number of memoperand");
11300 (*MIB).setMemRefs(bInstr->memoperands_begin(),
11301 bInstr->memoperands_end());
11303 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), destOper.getReg());
11304 MIB.addReg(EAXreg);
11307 BuildMI(newMBB, dl, TII->get(X86::JNE_4)).addMBB(newMBB);
11309 bInstr->eraseFromParent(); // The pseudo instruction is gone now.
11313 // private utility function: 64 bit atomics on 32 bit host.
11314 MachineBasicBlock *
11315 X86TargetLowering::EmitAtomicBit6432WithCustomInserter(MachineInstr *bInstr,
11316 MachineBasicBlock *MBB,
11321 bool invSrc) const {
11322 // For the atomic bitwise operator, we generate
11323 // thisMBB (instructions are in pairs, except cmpxchg8b)
11324 // ld t1,t2 = [bitinstr.addr]
11326 // out1, out2 = phi (thisMBB, t1/t2) (newMBB, t3/t4)
11327 // op t5, t6 <- out1, out2, [bitinstr.val]
11328 // (for SWAP, substitute: mov t5, t6 <- [bitinstr.val])
11329 // mov ECX, EBX <- t5, t6
11330 // mov EAX, EDX <- t1, t2
11331 // cmpxchg8b [bitinstr.addr] [EAX, EDX, EBX, ECX implicit]
11332 // mov t3, t4 <- EAX, EDX
11334 // result in out1, out2
11335 // fallthrough -->nextMBB
11337 const TargetRegisterClass *RC = X86::GR32RegisterClass;
11338 const unsigned LoadOpc = X86::MOV32rm;
11339 const unsigned NotOpc = X86::NOT32r;
11340 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11341 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
11342 MachineFunction::iterator MBBIter = MBB;
11345 /// First build the CFG
11346 MachineFunction *F = MBB->getParent();
11347 MachineBasicBlock *thisMBB = MBB;
11348 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
11349 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
11350 F->insert(MBBIter, newMBB);
11351 F->insert(MBBIter, nextMBB);
11353 // Transfer the remainder of thisMBB and its successor edges to nextMBB.
11354 nextMBB->splice(nextMBB->begin(), thisMBB,
11355 llvm::next(MachineBasicBlock::iterator(bInstr)),
11357 nextMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
11359 // Update thisMBB to fall through to newMBB
11360 thisMBB->addSuccessor(newMBB);
11362 // newMBB jumps to itself and fall through to nextMBB
11363 newMBB->addSuccessor(nextMBB);
11364 newMBB->addSuccessor(newMBB);
11366 DebugLoc dl = bInstr->getDebugLoc();
11367 // Insert instructions into newMBB based on incoming instruction
11368 // There are 8 "real" operands plus 9 implicit def/uses, ignored here.
11369 assert(bInstr->getNumOperands() < X86::AddrNumOperands + 14 &&
11370 "unexpected number of operands");
11371 MachineOperand& dest1Oper = bInstr->getOperand(0);
11372 MachineOperand& dest2Oper = bInstr->getOperand(1);
11373 MachineOperand* argOpers[2 + X86::AddrNumOperands];
11374 for (int i=0; i < 2 + X86::AddrNumOperands; ++i) {
11375 argOpers[i] = &bInstr->getOperand(i+2);
11377 // We use some of the operands multiple times, so conservatively just
11378 // clear any kill flags that might be present.
11379 if (argOpers[i]->isReg() && argOpers[i]->isUse())
11380 argOpers[i]->setIsKill(false);
11383 // x86 address has 5 operands: base, index, scale, displacement, and segment.
11384 int lastAddrIndx = X86::AddrNumOperands - 1; // [0,3]
11386 unsigned t1 = F->getRegInfo().createVirtualRegister(RC);
11387 MachineInstrBuilder MIB = BuildMI(thisMBB, dl, TII->get(LoadOpc), t1);
11388 for (int i=0; i <= lastAddrIndx; ++i)
11389 (*MIB).addOperand(*argOpers[i]);
11390 unsigned t2 = F->getRegInfo().createVirtualRegister(RC);
11391 MIB = BuildMI(thisMBB, dl, TII->get(LoadOpc), t2);
11392 // add 4 to displacement.
11393 for (int i=0; i <= lastAddrIndx-2; ++i)
11394 (*MIB).addOperand(*argOpers[i]);
11395 MachineOperand newOp3 = *(argOpers[3]);
11396 if (newOp3.isImm())
11397 newOp3.setImm(newOp3.getImm()+4);
11399 newOp3.setOffset(newOp3.getOffset()+4);
11400 (*MIB).addOperand(newOp3);
11401 (*MIB).addOperand(*argOpers[lastAddrIndx]);
11403 // t3/4 are defined later, at the bottom of the loop
11404 unsigned t3 = F->getRegInfo().createVirtualRegister(RC);
11405 unsigned t4 = F->getRegInfo().createVirtualRegister(RC);
11406 BuildMI(newMBB, dl, TII->get(X86::PHI), dest1Oper.getReg())
11407 .addReg(t1).addMBB(thisMBB).addReg(t3).addMBB(newMBB);
11408 BuildMI(newMBB, dl, TII->get(X86::PHI), dest2Oper.getReg())
11409 .addReg(t2).addMBB(thisMBB).addReg(t4).addMBB(newMBB);
11411 // The subsequent operations should be using the destination registers of
11412 //the PHI instructions.
11414 t1 = F->getRegInfo().createVirtualRegister(RC);
11415 t2 = F->getRegInfo().createVirtualRegister(RC);
11416 MIB = BuildMI(newMBB, dl, TII->get(NotOpc), t1).addReg(dest1Oper.getReg());
11417 MIB = BuildMI(newMBB, dl, TII->get(NotOpc), t2).addReg(dest2Oper.getReg());
11419 t1 = dest1Oper.getReg();
11420 t2 = dest2Oper.getReg();
11423 int valArgIndx = lastAddrIndx + 1;
11424 assert((argOpers[valArgIndx]->isReg() ||
11425 argOpers[valArgIndx]->isImm()) &&
11426 "invalid operand");
11427 unsigned t5 = F->getRegInfo().createVirtualRegister(RC);
11428 unsigned t6 = F->getRegInfo().createVirtualRegister(RC);
11429 if (argOpers[valArgIndx]->isReg())
11430 MIB = BuildMI(newMBB, dl, TII->get(regOpcL), t5);
11432 MIB = BuildMI(newMBB, dl, TII->get(immOpcL), t5);
11433 if (regOpcL != X86::MOV32rr)
11435 (*MIB).addOperand(*argOpers[valArgIndx]);
11436 assert(argOpers[valArgIndx + 1]->isReg() ==
11437 argOpers[valArgIndx]->isReg());
11438 assert(argOpers[valArgIndx + 1]->isImm() ==
11439 argOpers[valArgIndx]->isImm());
11440 if (argOpers[valArgIndx + 1]->isReg())
11441 MIB = BuildMI(newMBB, dl, TII->get(regOpcH), t6);
11443 MIB = BuildMI(newMBB, dl, TII->get(immOpcH), t6);
11444 if (regOpcH != X86::MOV32rr)
11446 (*MIB).addOperand(*argOpers[valArgIndx + 1]);
11448 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EAX);
11450 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EDX);
11453 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EBX);
11455 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::ECX);
11458 MIB = BuildMI(newMBB, dl, TII->get(X86::LCMPXCHG8B));
11459 for (int i=0; i <= lastAddrIndx; ++i)
11460 (*MIB).addOperand(*argOpers[i]);
11462 assert(bInstr->hasOneMemOperand() && "Unexpected number of memoperand");
11463 (*MIB).setMemRefs(bInstr->memoperands_begin(),
11464 bInstr->memoperands_end());
11466 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), t3);
11467 MIB.addReg(X86::EAX);
11468 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), t4);
11469 MIB.addReg(X86::EDX);
11472 BuildMI(newMBB, dl, TII->get(X86::JNE_4)).addMBB(newMBB);
11474 bInstr->eraseFromParent(); // The pseudo instruction is gone now.
11478 // private utility function
11479 MachineBasicBlock *
11480 X86TargetLowering::EmitAtomicMinMaxWithCustomInserter(MachineInstr *mInstr,
11481 MachineBasicBlock *MBB,
11482 unsigned cmovOpc) const {
11483 // For the atomic min/max operator, we generate
11486 // ld t1 = [min/max.addr]
11487 // mov t2 = [min/max.val]
11489 // cmov[cond] t2 = t1
11491 // lcs dest = [bitinstr.addr], t2 [EAX is implicit]
11493 // fallthrough -->nextMBB
11495 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11496 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
11497 MachineFunction::iterator MBBIter = MBB;
11500 /// First build the CFG
11501 MachineFunction *F = MBB->getParent();
11502 MachineBasicBlock *thisMBB = MBB;
11503 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
11504 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
11505 F->insert(MBBIter, newMBB);
11506 F->insert(MBBIter, nextMBB);
11508 // Transfer the remainder of thisMBB and its successor edges to nextMBB.
11509 nextMBB->splice(nextMBB->begin(), thisMBB,
11510 llvm::next(MachineBasicBlock::iterator(mInstr)),
11512 nextMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
11514 // Update thisMBB to fall through to newMBB
11515 thisMBB->addSuccessor(newMBB);
11517 // newMBB jumps to newMBB and fall through to nextMBB
11518 newMBB->addSuccessor(nextMBB);
11519 newMBB->addSuccessor(newMBB);
11521 DebugLoc dl = mInstr->getDebugLoc();
11522 // Insert instructions into newMBB based on incoming instruction
11523 assert(mInstr->getNumOperands() < X86::AddrNumOperands + 4 &&
11524 "unexpected number of operands");
11525 MachineOperand& destOper = mInstr->getOperand(0);
11526 MachineOperand* argOpers[2 + X86::AddrNumOperands];
11527 int numArgs = mInstr->getNumOperands() - 1;
11528 for (int i=0; i < numArgs; ++i)
11529 argOpers[i] = &mInstr->getOperand(i+1);
11531 // x86 address has 4 operands: base, index, scale, and displacement
11532 int lastAddrIndx = X86::AddrNumOperands - 1; // [0,3]
11533 int valArgIndx = lastAddrIndx + 1;
11535 unsigned t1 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
11536 MachineInstrBuilder MIB = BuildMI(newMBB, dl, TII->get(X86::MOV32rm), t1);
11537 for (int i=0; i <= lastAddrIndx; ++i)
11538 (*MIB).addOperand(*argOpers[i]);
11540 // We only support register and immediate values
11541 assert((argOpers[valArgIndx]->isReg() ||
11542 argOpers[valArgIndx]->isImm()) &&
11543 "invalid operand");
11545 unsigned t2 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
11546 if (argOpers[valArgIndx]->isReg())
11547 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), t2);
11549 MIB = BuildMI(newMBB, dl, TII->get(X86::MOV32rr), t2);
11550 (*MIB).addOperand(*argOpers[valArgIndx]);
11552 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EAX);
11555 MIB = BuildMI(newMBB, dl, TII->get(X86::CMP32rr));
11560 unsigned t3 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
11561 MIB = BuildMI(newMBB, dl, TII->get(cmovOpc),t3);
11565 // Cmp and exchange if none has modified the memory location
11566 MIB = BuildMI(newMBB, dl, TII->get(X86::LCMPXCHG32));
11567 for (int i=0; i <= lastAddrIndx; ++i)
11568 (*MIB).addOperand(*argOpers[i]);
11570 assert(mInstr->hasOneMemOperand() && "Unexpected number of memoperand");
11571 (*MIB).setMemRefs(mInstr->memoperands_begin(),
11572 mInstr->memoperands_end());
11574 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), destOper.getReg());
11575 MIB.addReg(X86::EAX);
11578 BuildMI(newMBB, dl, TII->get(X86::JNE_4)).addMBB(newMBB);
11580 mInstr->eraseFromParent(); // The pseudo instruction is gone now.
11584 // FIXME: When we get size specific XMM0 registers, i.e. XMM0_V16I8
11585 // or XMM0_V32I8 in AVX all of this code can be replaced with that
11586 // in the .td file.
11587 MachineBasicBlock *
11588 X86TargetLowering::EmitPCMP(MachineInstr *MI, MachineBasicBlock *BB,
11589 unsigned numArgs, bool memArg) const {
11590 assert(Subtarget->hasSSE42() &&
11591 "Target must have SSE4.2 or AVX features enabled");
11593 DebugLoc dl = MI->getDebugLoc();
11594 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11596 if (!Subtarget->hasAVX()) {
11598 Opc = numArgs == 3 ? X86::PCMPISTRM128rm : X86::PCMPESTRM128rm;
11600 Opc = numArgs == 3 ? X86::PCMPISTRM128rr : X86::PCMPESTRM128rr;
11603 Opc = numArgs == 3 ? X86::VPCMPISTRM128rm : X86::VPCMPESTRM128rm;
11605 Opc = numArgs == 3 ? X86::VPCMPISTRM128rr : X86::VPCMPESTRM128rr;
11608 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(Opc));
11609 for (unsigned i = 0; i < numArgs; ++i) {
11610 MachineOperand &Op = MI->getOperand(i+1);
11611 if (!(Op.isReg() && Op.isImplicit()))
11612 MIB.addOperand(Op);
11614 BuildMI(*BB, MI, dl,
11615 TII->get(Subtarget->hasAVX() ? X86::VMOVAPSrr : X86::MOVAPSrr),
11616 MI->getOperand(0).getReg())
11617 .addReg(X86::XMM0);
11619 MI->eraseFromParent();
11623 MachineBasicBlock *
11624 X86TargetLowering::EmitMonitor(MachineInstr *MI, MachineBasicBlock *BB) const {
11625 DebugLoc dl = MI->getDebugLoc();
11626 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11628 // Address into RAX/EAX, other two args into ECX, EDX.
11629 unsigned MemOpc = Subtarget->is64Bit() ? X86::LEA64r : X86::LEA32r;
11630 unsigned MemReg = Subtarget->is64Bit() ? X86::RAX : X86::EAX;
11631 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(MemOpc), MemReg);
11632 for (int i = 0; i < X86::AddrNumOperands; ++i)
11633 MIB.addOperand(MI->getOperand(i));
11635 unsigned ValOps = X86::AddrNumOperands;
11636 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::ECX)
11637 .addReg(MI->getOperand(ValOps).getReg());
11638 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::EDX)
11639 .addReg(MI->getOperand(ValOps+1).getReg());
11641 // The instruction doesn't actually take any operands though.
11642 BuildMI(*BB, MI, dl, TII->get(X86::MONITORrrr));
11644 MI->eraseFromParent(); // The pseudo is gone now.
11648 MachineBasicBlock *
11649 X86TargetLowering::EmitMwait(MachineInstr *MI, MachineBasicBlock *BB) const {
11650 DebugLoc dl = MI->getDebugLoc();
11651 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11653 // First arg in ECX, the second in EAX.
11654 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::ECX)
11655 .addReg(MI->getOperand(0).getReg());
11656 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::EAX)
11657 .addReg(MI->getOperand(1).getReg());
11659 // The instruction doesn't actually take any operands though.
11660 BuildMI(*BB, MI, dl, TII->get(X86::MWAITrr));
11662 MI->eraseFromParent(); // The pseudo is gone now.
11666 MachineBasicBlock *
11667 X86TargetLowering::EmitVAARG64WithCustomInserter(
11669 MachineBasicBlock *MBB) const {
11670 // Emit va_arg instruction on X86-64.
11672 // Operands to this pseudo-instruction:
11673 // 0 ) Output : destination address (reg)
11674 // 1-5) Input : va_list address (addr, i64mem)
11675 // 6 ) ArgSize : Size (in bytes) of vararg type
11676 // 7 ) ArgMode : 0=overflow only, 1=use gp_offset, 2=use fp_offset
11677 // 8 ) Align : Alignment of type
11678 // 9 ) EFLAGS (implicit-def)
11680 assert(MI->getNumOperands() == 10 && "VAARG_64 should have 10 operands!");
11681 assert(X86::AddrNumOperands == 5 && "VAARG_64 assumes 5 address operands");
11683 unsigned DestReg = MI->getOperand(0).getReg();
11684 MachineOperand &Base = MI->getOperand(1);
11685 MachineOperand &Scale = MI->getOperand(2);
11686 MachineOperand &Index = MI->getOperand(3);
11687 MachineOperand &Disp = MI->getOperand(4);
11688 MachineOperand &Segment = MI->getOperand(5);
11689 unsigned ArgSize = MI->getOperand(6).getImm();
11690 unsigned ArgMode = MI->getOperand(7).getImm();
11691 unsigned Align = MI->getOperand(8).getImm();
11693 // Memory Reference
11694 assert(MI->hasOneMemOperand() && "Expected VAARG_64 to have one memoperand");
11695 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
11696 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
11698 // Machine Information
11699 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11700 MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo();
11701 const TargetRegisterClass *AddrRegClass = getRegClassFor(MVT::i64);
11702 const TargetRegisterClass *OffsetRegClass = getRegClassFor(MVT::i32);
11703 DebugLoc DL = MI->getDebugLoc();
11705 // struct va_list {
11708 // i64 overflow_area (address)
11709 // i64 reg_save_area (address)
11711 // sizeof(va_list) = 24
11712 // alignment(va_list) = 8
11714 unsigned TotalNumIntRegs = 6;
11715 unsigned TotalNumXMMRegs = 8;
11716 bool UseGPOffset = (ArgMode == 1);
11717 bool UseFPOffset = (ArgMode == 2);
11718 unsigned MaxOffset = TotalNumIntRegs * 8 +
11719 (UseFPOffset ? TotalNumXMMRegs * 16 : 0);
11721 /* Align ArgSize to a multiple of 8 */
11722 unsigned ArgSizeA8 = (ArgSize + 7) & ~7;
11723 bool NeedsAlign = (Align > 8);
11725 MachineBasicBlock *thisMBB = MBB;
11726 MachineBasicBlock *overflowMBB;
11727 MachineBasicBlock *offsetMBB;
11728 MachineBasicBlock *endMBB;
11730 unsigned OffsetDestReg = 0; // Argument address computed by offsetMBB
11731 unsigned OverflowDestReg = 0; // Argument address computed by overflowMBB
11732 unsigned OffsetReg = 0;
11734 if (!UseGPOffset && !UseFPOffset) {
11735 // If we only pull from the overflow region, we don't create a branch.
11736 // We don't need to alter control flow.
11737 OffsetDestReg = 0; // unused
11738 OverflowDestReg = DestReg;
11741 overflowMBB = thisMBB;
11744 // First emit code to check if gp_offset (or fp_offset) is below the bound.
11745 // If so, pull the argument from reg_save_area. (branch to offsetMBB)
11746 // If not, pull from overflow_area. (branch to overflowMBB)
11751 // offsetMBB overflowMBB
11756 // Registers for the PHI in endMBB
11757 OffsetDestReg = MRI.createVirtualRegister(AddrRegClass);
11758 OverflowDestReg = MRI.createVirtualRegister(AddrRegClass);
11760 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
11761 MachineFunction *MF = MBB->getParent();
11762 overflowMBB = MF->CreateMachineBasicBlock(LLVM_BB);
11763 offsetMBB = MF->CreateMachineBasicBlock(LLVM_BB);
11764 endMBB = MF->CreateMachineBasicBlock(LLVM_BB);
11766 MachineFunction::iterator MBBIter = MBB;
11769 // Insert the new basic blocks
11770 MF->insert(MBBIter, offsetMBB);
11771 MF->insert(MBBIter, overflowMBB);
11772 MF->insert(MBBIter, endMBB);
11774 // Transfer the remainder of MBB and its successor edges to endMBB.
11775 endMBB->splice(endMBB->begin(), thisMBB,
11776 llvm::next(MachineBasicBlock::iterator(MI)),
11778 endMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
11780 // Make offsetMBB and overflowMBB successors of thisMBB
11781 thisMBB->addSuccessor(offsetMBB);
11782 thisMBB->addSuccessor(overflowMBB);
11784 // endMBB is a successor of both offsetMBB and overflowMBB
11785 offsetMBB->addSuccessor(endMBB);
11786 overflowMBB->addSuccessor(endMBB);
11788 // Load the offset value into a register
11789 OffsetReg = MRI.createVirtualRegister(OffsetRegClass);
11790 BuildMI(thisMBB, DL, TII->get(X86::MOV32rm), OffsetReg)
11794 .addDisp(Disp, UseFPOffset ? 4 : 0)
11795 .addOperand(Segment)
11796 .setMemRefs(MMOBegin, MMOEnd);
11798 // Check if there is enough room left to pull this argument.
11799 BuildMI(thisMBB, DL, TII->get(X86::CMP32ri))
11801 .addImm(MaxOffset + 8 - ArgSizeA8);
11803 // Branch to "overflowMBB" if offset >= max
11804 // Fall through to "offsetMBB" otherwise
11805 BuildMI(thisMBB, DL, TII->get(X86::GetCondBranchFromCond(X86::COND_AE)))
11806 .addMBB(overflowMBB);
11809 // In offsetMBB, emit code to use the reg_save_area.
11811 assert(OffsetReg != 0);
11813 // Read the reg_save_area address.
11814 unsigned RegSaveReg = MRI.createVirtualRegister(AddrRegClass);
11815 BuildMI(offsetMBB, DL, TII->get(X86::MOV64rm), RegSaveReg)
11820 .addOperand(Segment)
11821 .setMemRefs(MMOBegin, MMOEnd);
11823 // Zero-extend the offset
11824 unsigned OffsetReg64 = MRI.createVirtualRegister(AddrRegClass);
11825 BuildMI(offsetMBB, DL, TII->get(X86::SUBREG_TO_REG), OffsetReg64)
11828 .addImm(X86::sub_32bit);
11830 // Add the offset to the reg_save_area to get the final address.
11831 BuildMI(offsetMBB, DL, TII->get(X86::ADD64rr), OffsetDestReg)
11832 .addReg(OffsetReg64)
11833 .addReg(RegSaveReg);
11835 // Compute the offset for the next argument
11836 unsigned NextOffsetReg = MRI.createVirtualRegister(OffsetRegClass);
11837 BuildMI(offsetMBB, DL, TII->get(X86::ADD32ri), NextOffsetReg)
11839 .addImm(UseFPOffset ? 16 : 8);
11841 // Store it back into the va_list.
11842 BuildMI(offsetMBB, DL, TII->get(X86::MOV32mr))
11846 .addDisp(Disp, UseFPOffset ? 4 : 0)
11847 .addOperand(Segment)
11848 .addReg(NextOffsetReg)
11849 .setMemRefs(MMOBegin, MMOEnd);
11852 BuildMI(offsetMBB, DL, TII->get(X86::JMP_4))
11857 // Emit code to use overflow area
11860 // Load the overflow_area address into a register.
11861 unsigned OverflowAddrReg = MRI.createVirtualRegister(AddrRegClass);
11862 BuildMI(overflowMBB, DL, TII->get(X86::MOV64rm), OverflowAddrReg)
11867 .addOperand(Segment)
11868 .setMemRefs(MMOBegin, MMOEnd);
11870 // If we need to align it, do so. Otherwise, just copy the address
11871 // to OverflowDestReg.
11873 // Align the overflow address
11874 assert((Align & (Align-1)) == 0 && "Alignment must be a power of 2");
11875 unsigned TmpReg = MRI.createVirtualRegister(AddrRegClass);
11877 // aligned_addr = (addr + (align-1)) & ~(align-1)
11878 BuildMI(overflowMBB, DL, TII->get(X86::ADD64ri32), TmpReg)
11879 .addReg(OverflowAddrReg)
11882 BuildMI(overflowMBB, DL, TII->get(X86::AND64ri32), OverflowDestReg)
11884 .addImm(~(uint64_t)(Align-1));
11886 BuildMI(overflowMBB, DL, TII->get(TargetOpcode::COPY), OverflowDestReg)
11887 .addReg(OverflowAddrReg);
11890 // Compute the next overflow address after this argument.
11891 // (the overflow address should be kept 8-byte aligned)
11892 unsigned NextAddrReg = MRI.createVirtualRegister(AddrRegClass);
11893 BuildMI(overflowMBB, DL, TII->get(X86::ADD64ri32), NextAddrReg)
11894 .addReg(OverflowDestReg)
11895 .addImm(ArgSizeA8);
11897 // Store the new overflow address.
11898 BuildMI(overflowMBB, DL, TII->get(X86::MOV64mr))
11903 .addOperand(Segment)
11904 .addReg(NextAddrReg)
11905 .setMemRefs(MMOBegin, MMOEnd);
11907 // If we branched, emit the PHI to the front of endMBB.
11909 BuildMI(*endMBB, endMBB->begin(), DL,
11910 TII->get(X86::PHI), DestReg)
11911 .addReg(OffsetDestReg).addMBB(offsetMBB)
11912 .addReg(OverflowDestReg).addMBB(overflowMBB);
11915 // Erase the pseudo instruction
11916 MI->eraseFromParent();
11921 MachineBasicBlock *
11922 X86TargetLowering::EmitVAStartSaveXMMRegsWithCustomInserter(
11924 MachineBasicBlock *MBB) const {
11925 // Emit code to save XMM registers to the stack. The ABI says that the
11926 // number of registers to save is given in %al, so it's theoretically
11927 // possible to do an indirect jump trick to avoid saving all of them,
11928 // however this code takes a simpler approach and just executes all
11929 // of the stores if %al is non-zero. It's less code, and it's probably
11930 // easier on the hardware branch predictor, and stores aren't all that
11931 // expensive anyway.
11933 // Create the new basic blocks. One block contains all the XMM stores,
11934 // and one block is the final destination regardless of whether any
11935 // stores were performed.
11936 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
11937 MachineFunction *F = MBB->getParent();
11938 MachineFunction::iterator MBBIter = MBB;
11940 MachineBasicBlock *XMMSaveMBB = F->CreateMachineBasicBlock(LLVM_BB);
11941 MachineBasicBlock *EndMBB = F->CreateMachineBasicBlock(LLVM_BB);
11942 F->insert(MBBIter, XMMSaveMBB);
11943 F->insert(MBBIter, EndMBB);
11945 // Transfer the remainder of MBB and its successor edges to EndMBB.
11946 EndMBB->splice(EndMBB->begin(), MBB,
11947 llvm::next(MachineBasicBlock::iterator(MI)),
11949 EndMBB->transferSuccessorsAndUpdatePHIs(MBB);
11951 // The original block will now fall through to the XMM save block.
11952 MBB->addSuccessor(XMMSaveMBB);
11953 // The XMMSaveMBB will fall through to the end block.
11954 XMMSaveMBB->addSuccessor(EndMBB);
11956 // Now add the instructions.
11957 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11958 DebugLoc DL = MI->getDebugLoc();
11960 unsigned CountReg = MI->getOperand(0).getReg();
11961 int64_t RegSaveFrameIndex = MI->getOperand(1).getImm();
11962 int64_t VarArgsFPOffset = MI->getOperand(2).getImm();
11964 if (!Subtarget->isTargetWin64()) {
11965 // If %al is 0, branch around the XMM save block.
11966 BuildMI(MBB, DL, TII->get(X86::TEST8rr)).addReg(CountReg).addReg(CountReg);
11967 BuildMI(MBB, DL, TII->get(X86::JE_4)).addMBB(EndMBB);
11968 MBB->addSuccessor(EndMBB);
11971 unsigned MOVOpc = Subtarget->hasAVX() ? X86::VMOVAPSmr : X86::MOVAPSmr;
11972 // In the XMM save block, save all the XMM argument registers.
11973 for (int i = 3, e = MI->getNumOperands(); i != e; ++i) {
11974 int64_t Offset = (i - 3) * 16 + VarArgsFPOffset;
11975 MachineMemOperand *MMO =
11976 F->getMachineMemOperand(
11977 MachinePointerInfo::getFixedStack(RegSaveFrameIndex, Offset),
11978 MachineMemOperand::MOStore,
11979 /*Size=*/16, /*Align=*/16);
11980 BuildMI(XMMSaveMBB, DL, TII->get(MOVOpc))
11981 .addFrameIndex(RegSaveFrameIndex)
11982 .addImm(/*Scale=*/1)
11983 .addReg(/*IndexReg=*/0)
11984 .addImm(/*Disp=*/Offset)
11985 .addReg(/*Segment=*/0)
11986 .addReg(MI->getOperand(i).getReg())
11987 .addMemOperand(MMO);
11990 MI->eraseFromParent(); // The pseudo instruction is gone now.
11995 // The EFLAGS operand of SelectItr might be missing a kill marker
11996 // because there were multiple uses of EFLAGS, and ISel didn't know
11997 // which to mark. Figure out whether SelectItr should have had a
11998 // kill marker, and set it if it should. Returns the correct kill
12000 static bool checkAndUpdateEFLAGSKill(MachineBasicBlock::iterator SelectItr,
12001 MachineBasicBlock* BB,
12002 const TargetRegisterInfo* TRI) {
12003 // Scan forward through BB for a use/def of EFLAGS.
12004 MachineBasicBlock::iterator miI(llvm::next(SelectItr));
12005 for (MachineBasicBlock::iterator miE = BB->end(); miI != miE; ++miI) {
12006 const MachineInstr& mi = *miI;
12007 if (mi.readsRegister(X86::EFLAGS))
12009 if (mi.definesRegister(X86::EFLAGS))
12010 break; // Should have kill-flag - update below.
12013 // If we hit the end of the block, check whether EFLAGS is live into a
12015 if (miI == BB->end()) {
12016 for (MachineBasicBlock::succ_iterator sItr = BB->succ_begin(),
12017 sEnd = BB->succ_end();
12018 sItr != sEnd; ++sItr) {
12019 MachineBasicBlock* succ = *sItr;
12020 if (succ->isLiveIn(X86::EFLAGS))
12025 // We found a def, or hit the end of the basic block and EFLAGS wasn't live
12026 // out. SelectMI should have a kill flag on EFLAGS.
12027 SelectItr->addRegisterKilled(X86::EFLAGS, TRI);
12031 MachineBasicBlock *
12032 X86TargetLowering::EmitLoweredSelect(MachineInstr *MI,
12033 MachineBasicBlock *BB) const {
12034 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
12035 DebugLoc DL = MI->getDebugLoc();
12037 // To "insert" a SELECT_CC instruction, we actually have to insert the
12038 // diamond control-flow pattern. The incoming instruction knows the
12039 // destination vreg to set, the condition code register to branch on, the
12040 // true/false values to select between, and a branch opcode to use.
12041 const BasicBlock *LLVM_BB = BB->getBasicBlock();
12042 MachineFunction::iterator It = BB;
12048 // cmpTY ccX, r1, r2
12050 // fallthrough --> copy0MBB
12051 MachineBasicBlock *thisMBB = BB;
12052 MachineFunction *F = BB->getParent();
12053 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
12054 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
12055 F->insert(It, copy0MBB);
12056 F->insert(It, sinkMBB);
12058 // If the EFLAGS register isn't dead in the terminator, then claim that it's
12059 // live into the sink and copy blocks.
12060 const TargetRegisterInfo* TRI = getTargetMachine().getRegisterInfo();
12061 if (!MI->killsRegister(X86::EFLAGS) &&
12062 !checkAndUpdateEFLAGSKill(MI, BB, TRI)) {
12063 copy0MBB->addLiveIn(X86::EFLAGS);
12064 sinkMBB->addLiveIn(X86::EFLAGS);
12067 // Transfer the remainder of BB and its successor edges to sinkMBB.
12068 sinkMBB->splice(sinkMBB->begin(), BB,
12069 llvm::next(MachineBasicBlock::iterator(MI)),
12071 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
12073 // Add the true and fallthrough blocks as its successors.
12074 BB->addSuccessor(copy0MBB);
12075 BB->addSuccessor(sinkMBB);
12077 // Create the conditional branch instruction.
12079 X86::GetCondBranchFromCond((X86::CondCode)MI->getOperand(3).getImm());
12080 BuildMI(BB, DL, TII->get(Opc)).addMBB(sinkMBB);
12083 // %FalseValue = ...
12084 // # fallthrough to sinkMBB
12085 copy0MBB->addSuccessor(sinkMBB);
12088 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
12090 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
12091 TII->get(X86::PHI), MI->getOperand(0).getReg())
12092 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
12093 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
12095 MI->eraseFromParent(); // The pseudo instruction is gone now.
12099 MachineBasicBlock *
12100 X86TargetLowering::EmitLoweredSegAlloca(MachineInstr *MI, MachineBasicBlock *BB,
12101 bool Is64Bit) const {
12102 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
12103 DebugLoc DL = MI->getDebugLoc();
12104 MachineFunction *MF = BB->getParent();
12105 const BasicBlock *LLVM_BB = BB->getBasicBlock();
12107 assert(getTargetMachine().Options.EnableSegmentedStacks);
12109 unsigned TlsReg = Is64Bit ? X86::FS : X86::GS;
12110 unsigned TlsOffset = Is64Bit ? 0x70 : 0x30;
12113 // ... [Till the alloca]
12114 // If stacklet is not large enough, jump to mallocMBB
12117 // Allocate by subtracting from RSP
12118 // Jump to continueMBB
12121 // Allocate by call to runtime
12125 // [rest of original BB]
12128 MachineBasicBlock *mallocMBB = MF->CreateMachineBasicBlock(LLVM_BB);
12129 MachineBasicBlock *bumpMBB = MF->CreateMachineBasicBlock(LLVM_BB);
12130 MachineBasicBlock *continueMBB = MF->CreateMachineBasicBlock(LLVM_BB);
12132 MachineRegisterInfo &MRI = MF->getRegInfo();
12133 const TargetRegisterClass *AddrRegClass =
12134 getRegClassFor(Is64Bit ? MVT::i64:MVT::i32);
12136 unsigned mallocPtrVReg = MRI.createVirtualRegister(AddrRegClass),
12137 bumpSPPtrVReg = MRI.createVirtualRegister(AddrRegClass),
12138 tmpSPVReg = MRI.createVirtualRegister(AddrRegClass),
12139 SPLimitVReg = MRI.createVirtualRegister(AddrRegClass),
12140 sizeVReg = MI->getOperand(1).getReg(),
12141 physSPReg = Is64Bit ? X86::RSP : X86::ESP;
12143 MachineFunction::iterator MBBIter = BB;
12146 MF->insert(MBBIter, bumpMBB);
12147 MF->insert(MBBIter, mallocMBB);
12148 MF->insert(MBBIter, continueMBB);
12150 continueMBB->splice(continueMBB->begin(), BB, llvm::next
12151 (MachineBasicBlock::iterator(MI)), BB->end());
12152 continueMBB->transferSuccessorsAndUpdatePHIs(BB);
12154 // Add code to the main basic block to check if the stack limit has been hit,
12155 // and if so, jump to mallocMBB otherwise to bumpMBB.
12156 BuildMI(BB, DL, TII->get(TargetOpcode::COPY), tmpSPVReg).addReg(physSPReg);
12157 BuildMI(BB, DL, TII->get(Is64Bit ? X86::SUB64rr:X86::SUB32rr), SPLimitVReg)
12158 .addReg(tmpSPVReg).addReg(sizeVReg);
12159 BuildMI(BB, DL, TII->get(Is64Bit ? X86::CMP64mr:X86::CMP32mr))
12160 .addReg(0).addImm(1).addReg(0).addImm(TlsOffset).addReg(TlsReg)
12161 .addReg(SPLimitVReg);
12162 BuildMI(BB, DL, TII->get(X86::JG_4)).addMBB(mallocMBB);
12164 // bumpMBB simply decreases the stack pointer, since we know the current
12165 // stacklet has enough space.
12166 BuildMI(bumpMBB, DL, TII->get(TargetOpcode::COPY), physSPReg)
12167 .addReg(SPLimitVReg);
12168 BuildMI(bumpMBB, DL, TII->get(TargetOpcode::COPY), bumpSPPtrVReg)
12169 .addReg(SPLimitVReg);
12170 BuildMI(bumpMBB, DL, TII->get(X86::JMP_4)).addMBB(continueMBB);
12172 // Calls into a routine in libgcc to allocate more space from the heap.
12174 BuildMI(mallocMBB, DL, TII->get(X86::MOV64rr), X86::RDI)
12176 BuildMI(mallocMBB, DL, TII->get(X86::CALL64pcrel32))
12177 .addExternalSymbol("__morestack_allocate_stack_space").addReg(X86::RDI);
12179 BuildMI(mallocMBB, DL, TII->get(X86::SUB32ri), physSPReg).addReg(physSPReg)
12181 BuildMI(mallocMBB, DL, TII->get(X86::PUSH32r)).addReg(sizeVReg);
12182 BuildMI(mallocMBB, DL, TII->get(X86::CALLpcrel32))
12183 .addExternalSymbol("__morestack_allocate_stack_space");
12187 BuildMI(mallocMBB, DL, TII->get(X86::ADD32ri), physSPReg).addReg(physSPReg)
12190 BuildMI(mallocMBB, DL, TII->get(TargetOpcode::COPY), mallocPtrVReg)
12191 .addReg(Is64Bit ? X86::RAX : X86::EAX);
12192 BuildMI(mallocMBB, DL, TII->get(X86::JMP_4)).addMBB(continueMBB);
12194 // Set up the CFG correctly.
12195 BB->addSuccessor(bumpMBB);
12196 BB->addSuccessor(mallocMBB);
12197 mallocMBB->addSuccessor(continueMBB);
12198 bumpMBB->addSuccessor(continueMBB);
12200 // Take care of the PHI nodes.
12201 BuildMI(*continueMBB, continueMBB->begin(), DL, TII->get(X86::PHI),
12202 MI->getOperand(0).getReg())
12203 .addReg(mallocPtrVReg).addMBB(mallocMBB)
12204 .addReg(bumpSPPtrVReg).addMBB(bumpMBB);
12206 // Delete the original pseudo instruction.
12207 MI->eraseFromParent();
12210 return continueMBB;
12213 MachineBasicBlock *
12214 X86TargetLowering::EmitLoweredWinAlloca(MachineInstr *MI,
12215 MachineBasicBlock *BB) const {
12216 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
12217 DebugLoc DL = MI->getDebugLoc();
12219 assert(!Subtarget->isTargetEnvMacho());
12221 // The lowering is pretty easy: we're just emitting the call to _alloca. The
12222 // non-trivial part is impdef of ESP.
12224 if (Subtarget->isTargetWin64()) {
12225 if (Subtarget->isTargetCygMing()) {
12226 // ___chkstk(Mingw64):
12227 // Clobbers R10, R11, RAX and EFLAGS.
12229 BuildMI(*BB, MI, DL, TII->get(X86::W64ALLOCA))
12230 .addExternalSymbol("___chkstk")
12231 .addReg(X86::RAX, RegState::Implicit)
12232 .addReg(X86::RSP, RegState::Implicit)
12233 .addReg(X86::RAX, RegState::Define | RegState::Implicit)
12234 .addReg(X86::RSP, RegState::Define | RegState::Implicit)
12235 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
12237 // __chkstk(MSVCRT): does not update stack pointer.
12238 // Clobbers R10, R11 and EFLAGS.
12239 // FIXME: RAX(allocated size) might be reused and not killed.
12240 BuildMI(*BB, MI, DL, TII->get(X86::W64ALLOCA))
12241 .addExternalSymbol("__chkstk")
12242 .addReg(X86::RAX, RegState::Implicit)
12243 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
12244 // RAX has the offset to subtracted from RSP.
12245 BuildMI(*BB, MI, DL, TII->get(X86::SUB64rr), X86::RSP)
12250 const char *StackProbeSymbol =
12251 Subtarget->isTargetWindows() ? "_chkstk" : "_alloca";
12253 BuildMI(*BB, MI, DL, TII->get(X86::CALLpcrel32))
12254 .addExternalSymbol(StackProbeSymbol)
12255 .addReg(X86::EAX, RegState::Implicit)
12256 .addReg(X86::ESP, RegState::Implicit)
12257 .addReg(X86::EAX, RegState::Define | RegState::Implicit)
12258 .addReg(X86::ESP, RegState::Define | RegState::Implicit)
12259 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
12262 MI->eraseFromParent(); // The pseudo instruction is gone now.
12266 MachineBasicBlock *
12267 X86TargetLowering::EmitLoweredTLSCall(MachineInstr *MI,
12268 MachineBasicBlock *BB) const {
12269 // This is pretty easy. We're taking the value that we received from
12270 // our load from the relocation, sticking it in either RDI (x86-64)
12271 // or EAX and doing an indirect call. The return value will then
12272 // be in the normal return register.
12273 const X86InstrInfo *TII
12274 = static_cast<const X86InstrInfo*>(getTargetMachine().getInstrInfo());
12275 DebugLoc DL = MI->getDebugLoc();
12276 MachineFunction *F = BB->getParent();
12278 assert(Subtarget->isTargetDarwin() && "Darwin only instr emitted?");
12279 assert(MI->getOperand(3).isGlobal() && "This should be a global");
12281 if (Subtarget->is64Bit()) {
12282 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
12283 TII->get(X86::MOV64rm), X86::RDI)
12285 .addImm(0).addReg(0)
12286 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
12287 MI->getOperand(3).getTargetFlags())
12289 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL64m));
12290 addDirectMem(MIB, X86::RDI);
12291 } else if (getTargetMachine().getRelocationModel() != Reloc::PIC_) {
12292 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
12293 TII->get(X86::MOV32rm), X86::EAX)
12295 .addImm(0).addReg(0)
12296 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
12297 MI->getOperand(3).getTargetFlags())
12299 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m));
12300 addDirectMem(MIB, X86::EAX);
12302 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
12303 TII->get(X86::MOV32rm), X86::EAX)
12304 .addReg(TII->getGlobalBaseReg(F))
12305 .addImm(0).addReg(0)
12306 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
12307 MI->getOperand(3).getTargetFlags())
12309 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m));
12310 addDirectMem(MIB, X86::EAX);
12313 MI->eraseFromParent(); // The pseudo instruction is gone now.
12317 MachineBasicBlock *
12318 X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
12319 MachineBasicBlock *BB) const {
12320 switch (MI->getOpcode()) {
12321 default: llvm_unreachable("Unexpected instr type to insert");
12322 case X86::TAILJMPd64:
12323 case X86::TAILJMPr64:
12324 case X86::TAILJMPm64:
12325 assert(0 && "TAILJMP64 would not be touched here.");
12326 case X86::TCRETURNdi64:
12327 case X86::TCRETURNri64:
12328 case X86::TCRETURNmi64:
12329 // Defs of TCRETURNxx64 has Win64's callee-saved registers, as subset.
12330 // On AMD64, additional defs should be added before register allocation.
12331 if (!Subtarget->isTargetWin64()) {
12332 MI->addRegisterDefined(X86::RSI);
12333 MI->addRegisterDefined(X86::RDI);
12334 MI->addRegisterDefined(X86::XMM6);
12335 MI->addRegisterDefined(X86::XMM7);
12336 MI->addRegisterDefined(X86::XMM8);
12337 MI->addRegisterDefined(X86::XMM9);
12338 MI->addRegisterDefined(X86::XMM10);
12339 MI->addRegisterDefined(X86::XMM11);
12340 MI->addRegisterDefined(X86::XMM12);
12341 MI->addRegisterDefined(X86::XMM13);
12342 MI->addRegisterDefined(X86::XMM14);
12343 MI->addRegisterDefined(X86::XMM15);
12346 case X86::WIN_ALLOCA:
12347 return EmitLoweredWinAlloca(MI, BB);
12348 case X86::SEG_ALLOCA_32:
12349 return EmitLoweredSegAlloca(MI, BB, false);
12350 case X86::SEG_ALLOCA_64:
12351 return EmitLoweredSegAlloca(MI, BB, true);
12352 case X86::TLSCall_32:
12353 case X86::TLSCall_64:
12354 return EmitLoweredTLSCall(MI, BB);
12355 case X86::CMOV_GR8:
12356 case X86::CMOV_FR32:
12357 case X86::CMOV_FR64:
12358 case X86::CMOV_V4F32:
12359 case X86::CMOV_V2F64:
12360 case X86::CMOV_V2I64:
12361 case X86::CMOV_V8F32:
12362 case X86::CMOV_V4F64:
12363 case X86::CMOV_V4I64:
12364 case X86::CMOV_GR16:
12365 case X86::CMOV_GR32:
12366 case X86::CMOV_RFP32:
12367 case X86::CMOV_RFP64:
12368 case X86::CMOV_RFP80:
12369 return EmitLoweredSelect(MI, BB);
12371 case X86::FP32_TO_INT16_IN_MEM:
12372 case X86::FP32_TO_INT32_IN_MEM:
12373 case X86::FP32_TO_INT64_IN_MEM:
12374 case X86::FP64_TO_INT16_IN_MEM:
12375 case X86::FP64_TO_INT32_IN_MEM:
12376 case X86::FP64_TO_INT64_IN_MEM:
12377 case X86::FP80_TO_INT16_IN_MEM:
12378 case X86::FP80_TO_INT32_IN_MEM:
12379 case X86::FP80_TO_INT64_IN_MEM: {
12380 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
12381 DebugLoc DL = MI->getDebugLoc();
12383 // Change the floating point control register to use "round towards zero"
12384 // mode when truncating to an integer value.
12385 MachineFunction *F = BB->getParent();
12386 int CWFrameIdx = F->getFrameInfo()->CreateStackObject(2, 2, false);
12387 addFrameReference(BuildMI(*BB, MI, DL,
12388 TII->get(X86::FNSTCW16m)), CWFrameIdx);
12390 // Load the old value of the high byte of the control word...
12392 F->getRegInfo().createVirtualRegister(X86::GR16RegisterClass);
12393 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16rm), OldCW),
12396 // Set the high part to be round to zero...
12397 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mi)), CWFrameIdx)
12400 // Reload the modified control word now...
12401 addFrameReference(BuildMI(*BB, MI, DL,
12402 TII->get(X86::FLDCW16m)), CWFrameIdx);
12404 // Restore the memory image of control word to original value
12405 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mr)), CWFrameIdx)
12408 // Get the X86 opcode to use.
12410 switch (MI->getOpcode()) {
12411 default: llvm_unreachable("illegal opcode!");
12412 case X86::FP32_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m32; break;
12413 case X86::FP32_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m32; break;
12414 case X86::FP32_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m32; break;
12415 case X86::FP64_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m64; break;
12416 case X86::FP64_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m64; break;
12417 case X86::FP64_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m64; break;
12418 case X86::FP80_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m80; break;
12419 case X86::FP80_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m80; break;
12420 case X86::FP80_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m80; break;
12424 MachineOperand &Op = MI->getOperand(0);
12426 AM.BaseType = X86AddressMode::RegBase;
12427 AM.Base.Reg = Op.getReg();
12429 AM.BaseType = X86AddressMode::FrameIndexBase;
12430 AM.Base.FrameIndex = Op.getIndex();
12432 Op = MI->getOperand(1);
12434 AM.Scale = Op.getImm();
12435 Op = MI->getOperand(2);
12437 AM.IndexReg = Op.getImm();
12438 Op = MI->getOperand(3);
12439 if (Op.isGlobal()) {
12440 AM.GV = Op.getGlobal();
12442 AM.Disp = Op.getImm();
12444 addFullAddress(BuildMI(*BB, MI, DL, TII->get(Opc)), AM)
12445 .addReg(MI->getOperand(X86::AddrNumOperands).getReg());
12447 // Reload the original control word now.
12448 addFrameReference(BuildMI(*BB, MI, DL,
12449 TII->get(X86::FLDCW16m)), CWFrameIdx);
12451 MI->eraseFromParent(); // The pseudo instruction is gone now.
12454 // String/text processing lowering.
12455 case X86::PCMPISTRM128REG:
12456 case X86::VPCMPISTRM128REG:
12457 return EmitPCMP(MI, BB, 3, false /* in-mem */);
12458 case X86::PCMPISTRM128MEM:
12459 case X86::VPCMPISTRM128MEM:
12460 return EmitPCMP(MI, BB, 3, true /* in-mem */);
12461 case X86::PCMPESTRM128REG:
12462 case X86::VPCMPESTRM128REG:
12463 return EmitPCMP(MI, BB, 5, false /* in mem */);
12464 case X86::PCMPESTRM128MEM:
12465 case X86::VPCMPESTRM128MEM:
12466 return EmitPCMP(MI, BB, 5, true /* in mem */);
12468 // Thread synchronization.
12470 return EmitMonitor(MI, BB);
12472 return EmitMwait(MI, BB);
12474 // Atomic Lowering.
12475 case X86::ATOMAND32:
12476 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND32rr,
12477 X86::AND32ri, X86::MOV32rm,
12479 X86::NOT32r, X86::EAX,
12480 X86::GR32RegisterClass);
12481 case X86::ATOMOR32:
12482 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR32rr,
12483 X86::OR32ri, X86::MOV32rm,
12485 X86::NOT32r, X86::EAX,
12486 X86::GR32RegisterClass);
12487 case X86::ATOMXOR32:
12488 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR32rr,
12489 X86::XOR32ri, X86::MOV32rm,
12491 X86::NOT32r, X86::EAX,
12492 X86::GR32RegisterClass);
12493 case X86::ATOMNAND32:
12494 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND32rr,
12495 X86::AND32ri, X86::MOV32rm,
12497 X86::NOT32r, X86::EAX,
12498 X86::GR32RegisterClass, true);
12499 case X86::ATOMMIN32:
12500 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL32rr);
12501 case X86::ATOMMAX32:
12502 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG32rr);
12503 case X86::ATOMUMIN32:
12504 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB32rr);
12505 case X86::ATOMUMAX32:
12506 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA32rr);
12508 case X86::ATOMAND16:
12509 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND16rr,
12510 X86::AND16ri, X86::MOV16rm,
12512 X86::NOT16r, X86::AX,
12513 X86::GR16RegisterClass);
12514 case X86::ATOMOR16:
12515 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR16rr,
12516 X86::OR16ri, X86::MOV16rm,
12518 X86::NOT16r, X86::AX,
12519 X86::GR16RegisterClass);
12520 case X86::ATOMXOR16:
12521 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR16rr,
12522 X86::XOR16ri, X86::MOV16rm,
12524 X86::NOT16r, X86::AX,
12525 X86::GR16RegisterClass);
12526 case X86::ATOMNAND16:
12527 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND16rr,
12528 X86::AND16ri, X86::MOV16rm,
12530 X86::NOT16r, X86::AX,
12531 X86::GR16RegisterClass, true);
12532 case X86::ATOMMIN16:
12533 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL16rr);
12534 case X86::ATOMMAX16:
12535 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG16rr);
12536 case X86::ATOMUMIN16:
12537 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB16rr);
12538 case X86::ATOMUMAX16:
12539 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA16rr);
12541 case X86::ATOMAND8:
12542 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND8rr,
12543 X86::AND8ri, X86::MOV8rm,
12545 X86::NOT8r, X86::AL,
12546 X86::GR8RegisterClass);
12548 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR8rr,
12549 X86::OR8ri, X86::MOV8rm,
12551 X86::NOT8r, X86::AL,
12552 X86::GR8RegisterClass);
12553 case X86::ATOMXOR8:
12554 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR8rr,
12555 X86::XOR8ri, X86::MOV8rm,
12557 X86::NOT8r, X86::AL,
12558 X86::GR8RegisterClass);
12559 case X86::ATOMNAND8:
12560 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND8rr,
12561 X86::AND8ri, X86::MOV8rm,
12563 X86::NOT8r, X86::AL,
12564 X86::GR8RegisterClass, true);
12565 // FIXME: There are no CMOV8 instructions; MIN/MAX need some other way.
12566 // This group is for 64-bit host.
12567 case X86::ATOMAND64:
12568 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND64rr,
12569 X86::AND64ri32, X86::MOV64rm,
12571 X86::NOT64r, X86::RAX,
12572 X86::GR64RegisterClass);
12573 case X86::ATOMOR64:
12574 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR64rr,
12575 X86::OR64ri32, X86::MOV64rm,
12577 X86::NOT64r, X86::RAX,
12578 X86::GR64RegisterClass);
12579 case X86::ATOMXOR64:
12580 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR64rr,
12581 X86::XOR64ri32, X86::MOV64rm,
12583 X86::NOT64r, X86::RAX,
12584 X86::GR64RegisterClass);
12585 case X86::ATOMNAND64:
12586 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND64rr,
12587 X86::AND64ri32, X86::MOV64rm,
12589 X86::NOT64r, X86::RAX,
12590 X86::GR64RegisterClass, true);
12591 case X86::ATOMMIN64:
12592 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL64rr);
12593 case X86::ATOMMAX64:
12594 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG64rr);
12595 case X86::ATOMUMIN64:
12596 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB64rr);
12597 case X86::ATOMUMAX64:
12598 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA64rr);
12600 // This group does 64-bit operations on a 32-bit host.
12601 case X86::ATOMAND6432:
12602 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12603 X86::AND32rr, X86::AND32rr,
12604 X86::AND32ri, X86::AND32ri,
12606 case X86::ATOMOR6432:
12607 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12608 X86::OR32rr, X86::OR32rr,
12609 X86::OR32ri, X86::OR32ri,
12611 case X86::ATOMXOR6432:
12612 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12613 X86::XOR32rr, X86::XOR32rr,
12614 X86::XOR32ri, X86::XOR32ri,
12616 case X86::ATOMNAND6432:
12617 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12618 X86::AND32rr, X86::AND32rr,
12619 X86::AND32ri, X86::AND32ri,
12621 case X86::ATOMADD6432:
12622 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12623 X86::ADD32rr, X86::ADC32rr,
12624 X86::ADD32ri, X86::ADC32ri,
12626 case X86::ATOMSUB6432:
12627 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12628 X86::SUB32rr, X86::SBB32rr,
12629 X86::SUB32ri, X86::SBB32ri,
12631 case X86::ATOMSWAP6432:
12632 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12633 X86::MOV32rr, X86::MOV32rr,
12634 X86::MOV32ri, X86::MOV32ri,
12636 case X86::VASTART_SAVE_XMM_REGS:
12637 return EmitVAStartSaveXMMRegsWithCustomInserter(MI, BB);
12639 case X86::VAARG_64:
12640 return EmitVAARG64WithCustomInserter(MI, BB);
12644 //===----------------------------------------------------------------------===//
12645 // X86 Optimization Hooks
12646 //===----------------------------------------------------------------------===//
12648 void X86TargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
12652 const SelectionDAG &DAG,
12653 unsigned Depth) const {
12654 unsigned Opc = Op.getOpcode();
12655 assert((Opc >= ISD::BUILTIN_OP_END ||
12656 Opc == ISD::INTRINSIC_WO_CHAIN ||
12657 Opc == ISD::INTRINSIC_W_CHAIN ||
12658 Opc == ISD::INTRINSIC_VOID) &&
12659 "Should use MaskedValueIsZero if you don't know whether Op"
12660 " is a target node!");
12662 KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0); // Don't know anything.
12676 // These nodes' second result is a boolean.
12677 if (Op.getResNo() == 0)
12680 case X86ISD::SETCC:
12681 KnownZero |= APInt::getHighBitsSet(Mask.getBitWidth(),
12682 Mask.getBitWidth() - 1);
12684 case ISD::INTRINSIC_WO_CHAIN: {
12685 unsigned IntId = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
12686 unsigned NumLoBits = 0;
12689 case Intrinsic::x86_sse_movmsk_ps:
12690 case Intrinsic::x86_avx_movmsk_ps_256:
12691 case Intrinsic::x86_sse2_movmsk_pd:
12692 case Intrinsic::x86_avx_movmsk_pd_256:
12693 case Intrinsic::x86_mmx_pmovmskb:
12694 case Intrinsic::x86_sse2_pmovmskb_128:
12695 case Intrinsic::x86_avx2_pmovmskb: {
12696 // High bits of movmskp{s|d}, pmovmskb are known zero.
12698 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
12699 case Intrinsic::x86_sse_movmsk_ps: NumLoBits = 4; break;
12700 case Intrinsic::x86_avx_movmsk_ps_256: NumLoBits = 8; break;
12701 case Intrinsic::x86_sse2_movmsk_pd: NumLoBits = 2; break;
12702 case Intrinsic::x86_avx_movmsk_pd_256: NumLoBits = 4; break;
12703 case Intrinsic::x86_mmx_pmovmskb: NumLoBits = 8; break;
12704 case Intrinsic::x86_sse2_pmovmskb_128: NumLoBits = 16; break;
12705 case Intrinsic::x86_avx2_pmovmskb: NumLoBits = 32; break;
12707 KnownZero = APInt::getHighBitsSet(Mask.getBitWidth(),
12708 Mask.getBitWidth() - NumLoBits);
12717 unsigned X86TargetLowering::ComputeNumSignBitsForTargetNode(SDValue Op,
12718 unsigned Depth) const {
12719 // SETCC_CARRY sets the dest to ~0 for true or 0 for false.
12720 if (Op.getOpcode() == X86ISD::SETCC_CARRY)
12721 return Op.getValueType().getScalarType().getSizeInBits();
12727 /// isGAPlusOffset - Returns true (and the GlobalValue and the offset) if the
12728 /// node is a GlobalAddress + offset.
12729 bool X86TargetLowering::isGAPlusOffset(SDNode *N,
12730 const GlobalValue* &GA,
12731 int64_t &Offset) const {
12732 if (N->getOpcode() == X86ISD::Wrapper) {
12733 if (isa<GlobalAddressSDNode>(N->getOperand(0))) {
12734 GA = cast<GlobalAddressSDNode>(N->getOperand(0))->getGlobal();
12735 Offset = cast<GlobalAddressSDNode>(N->getOperand(0))->getOffset();
12739 return TargetLowering::isGAPlusOffset(N, GA, Offset);
12742 /// isShuffleHigh128VectorInsertLow - Checks whether the shuffle node is the
12743 /// same as extracting the high 128-bit part of 256-bit vector and then
12744 /// inserting the result into the low part of a new 256-bit vector
12745 static bool isShuffleHigh128VectorInsertLow(ShuffleVectorSDNode *SVOp) {
12746 EVT VT = SVOp->getValueType(0);
12747 int NumElems = VT.getVectorNumElements();
12749 // vector_shuffle <4, 5, 6, 7, u, u, u, u> or <2, 3, u, u>
12750 for (int i = 0, j = NumElems/2; i < NumElems/2; ++i, ++j)
12751 if (!isUndefOrEqual(SVOp->getMaskElt(i), j) ||
12752 SVOp->getMaskElt(j) >= 0)
12758 /// isShuffleLow128VectorInsertHigh - Checks whether the shuffle node is the
12759 /// same as extracting the low 128-bit part of 256-bit vector and then
12760 /// inserting the result into the high part of a new 256-bit vector
12761 static bool isShuffleLow128VectorInsertHigh(ShuffleVectorSDNode *SVOp) {
12762 EVT VT = SVOp->getValueType(0);
12763 int NumElems = VT.getVectorNumElements();
12765 // vector_shuffle <u, u, u, u, 0, 1, 2, 3> or <u, u, 0, 1>
12766 for (int i = NumElems/2, j = 0; i < NumElems; ++i, ++j)
12767 if (!isUndefOrEqual(SVOp->getMaskElt(i), j) ||
12768 SVOp->getMaskElt(j) >= 0)
12774 /// PerformShuffleCombine256 - Performs shuffle combines for 256-bit vectors.
12775 static SDValue PerformShuffleCombine256(SDNode *N, SelectionDAG &DAG,
12776 TargetLowering::DAGCombinerInfo &DCI,
12777 const X86Subtarget* Subtarget) {
12778 DebugLoc dl = N->getDebugLoc();
12779 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
12780 SDValue V1 = SVOp->getOperand(0);
12781 SDValue V2 = SVOp->getOperand(1);
12782 EVT VT = SVOp->getValueType(0);
12783 int NumElems = VT.getVectorNumElements();
12785 if (V1.getOpcode() == ISD::CONCAT_VECTORS &&
12786 V2.getOpcode() == ISD::CONCAT_VECTORS) {
12790 // V UNDEF BUILD_VECTOR UNDEF
12792 // CONCAT_VECTOR CONCAT_VECTOR
12795 // RESULT: V + zero extended
12797 if (V2.getOperand(0).getOpcode() != ISD::BUILD_VECTOR ||
12798 V2.getOperand(1).getOpcode() != ISD::UNDEF ||
12799 V1.getOperand(1).getOpcode() != ISD::UNDEF)
12802 if (!ISD::isBuildVectorAllZeros(V2.getOperand(0).getNode()))
12805 // To match the shuffle mask, the first half of the mask should
12806 // be exactly the first vector, and all the rest a splat with the
12807 // first element of the second one.
12808 for (int i = 0; i < NumElems/2; ++i)
12809 if (!isUndefOrEqual(SVOp->getMaskElt(i), i) ||
12810 !isUndefOrEqual(SVOp->getMaskElt(i+NumElems/2), NumElems))
12813 // If V1 is coming from a vector load then just fold to a VZEXT_LOAD.
12814 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(V1.getOperand(0))) {
12815 SDVTList Tys = DAG.getVTList(MVT::v4i64, MVT::Other);
12816 SDValue Ops[] = { Ld->getChain(), Ld->getBasePtr() };
12818 DAG.getMemIntrinsicNode(X86ISD::VZEXT_LOAD, dl, Tys, Ops, 2,
12820 Ld->getPointerInfo(),
12821 Ld->getAlignment(),
12822 false/*isVolatile*/, true/*ReadMem*/,
12823 false/*WriteMem*/);
12824 return DAG.getNode(ISD::BITCAST, dl, VT, ResNode);
12827 // Emit a zeroed vector and insert the desired subvector on its
12829 SDValue Zeros = getZeroVector(VT, Subtarget, DAG, dl);
12830 SDValue InsV = Insert128BitVector(Zeros, V1.getOperand(0),
12831 DAG.getConstant(0, MVT::i32), DAG, dl);
12832 return DCI.CombineTo(N, InsV);
12835 //===--------------------------------------------------------------------===//
12836 // Combine some shuffles into subvector extracts and inserts:
12839 // vector_shuffle <4, 5, 6, 7, u, u, u, u> or <2, 3, u, u>
12840 if (isShuffleHigh128VectorInsertLow(SVOp)) {
12841 SDValue V = Extract128BitVector(V1, DAG.getConstant(NumElems/2, MVT::i32),
12843 SDValue InsV = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, VT),
12844 V, DAG.getConstant(0, MVT::i32), DAG, dl);
12845 return DCI.CombineTo(N, InsV);
12848 // vector_shuffle <u, u, u, u, 0, 1, 2, 3> or <u, u, 0, 1>
12849 if (isShuffleLow128VectorInsertHigh(SVOp)) {
12850 SDValue V = Extract128BitVector(V1, DAG.getConstant(0, MVT::i32), DAG, dl);
12851 SDValue InsV = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, VT),
12852 V, DAG.getConstant(NumElems/2, MVT::i32), DAG, dl);
12853 return DCI.CombineTo(N, InsV);
12859 /// PerformShuffleCombine - Performs several different shuffle combines.
12860 static SDValue PerformShuffleCombine(SDNode *N, SelectionDAG &DAG,
12861 TargetLowering::DAGCombinerInfo &DCI,
12862 const X86Subtarget *Subtarget) {
12863 DebugLoc dl = N->getDebugLoc();
12864 EVT VT = N->getValueType(0);
12866 // Don't create instructions with illegal types after legalize types has run.
12867 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
12868 if (!DCI.isBeforeLegalize() && !TLI.isTypeLegal(VT.getVectorElementType()))
12871 // Combine 256-bit vector shuffles. This is only profitable when in AVX mode
12872 if (Subtarget->hasAVX() && VT.getSizeInBits() == 256 &&
12873 N->getOpcode() == ISD::VECTOR_SHUFFLE)
12874 return PerformShuffleCombine256(N, DAG, DCI, Subtarget);
12876 // Only handle 128 wide vector from here on.
12877 if (VT.getSizeInBits() != 128)
12880 // Combine a vector_shuffle that is equal to build_vector load1, load2, load3,
12881 // load4, <0, 1, 2, 3> into a 128-bit load if the load addresses are
12882 // consecutive, non-overlapping, and in the right order.
12883 SmallVector<SDValue, 16> Elts;
12884 for (unsigned i = 0, e = VT.getVectorNumElements(); i != e; ++i)
12885 Elts.push_back(getShuffleScalarElt(N, i, DAG, 0));
12887 return EltsFromConsecutiveLoads(VT, Elts, dl, DAG);
12891 /// PerformTruncateCombine - Converts truncate operation to
12892 /// a sequence of vector shuffle operations.
12893 /// It is possible when we truncate 256-bit vector to 128-bit vector
12895 SDValue X86TargetLowering::PerformTruncateCombine(SDNode *N, SelectionDAG &DAG,
12896 DAGCombinerInfo &DCI) const {
12897 if (!DCI.isBeforeLegalizeOps())
12900 if (!Subtarget->hasAVX()) return SDValue();
12902 EVT VT = N->getValueType(0);
12903 SDValue Op = N->getOperand(0);
12904 EVT OpVT = Op.getValueType();
12905 DebugLoc dl = N->getDebugLoc();
12907 if ((VT == MVT::v4i32) && (OpVT == MVT::v4i64)) {
12909 SDValue OpLo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v2i64, Op,
12910 DAG.getIntPtrConstant(0));
12912 SDValue OpHi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v2i64, Op,
12913 DAG.getIntPtrConstant(2));
12915 OpLo = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, OpLo);
12916 OpHi = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, OpHi);
12919 int ShufMask1[] = {0, 2, 0, 0};
12921 OpLo = DAG.getVectorShuffle(VT, dl, OpLo, DAG.getUNDEF(VT),
12923 OpHi = DAG.getVectorShuffle(VT, dl, OpHi, DAG.getUNDEF(VT),
12927 int ShufMask2[] = {0, 1, 4, 5};
12929 return DAG.getVectorShuffle(VT, dl, OpLo, OpHi, ShufMask2);
12931 if ((VT == MVT::v8i16) && (OpVT == MVT::v8i32)) {
12933 SDValue OpLo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i32, Op,
12934 DAG.getIntPtrConstant(0));
12936 SDValue OpHi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i32, Op,
12937 DAG.getIntPtrConstant(4));
12939 OpLo = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, OpLo);
12940 OpHi = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, OpHi);
12943 int ShufMask1[] = {0, 1, 4, 5, 8, 9, 12, 13,
12944 -1, -1, -1, -1, -1, -1, -1, -1};
12946 OpLo = DAG.getVectorShuffle(MVT::v16i8, dl, OpLo,
12947 DAG.getUNDEF(MVT::v16i8),
12949 OpHi = DAG.getVectorShuffle(MVT::v16i8, dl, OpHi,
12950 DAG.getUNDEF(MVT::v16i8),
12953 OpLo = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, OpLo);
12954 OpHi = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, OpHi);
12957 int ShufMask2[] = {0, 1, 4, 5};
12959 SDValue res = DAG.getVectorShuffle(MVT::v4i32, dl, OpLo, OpHi, ShufMask2);
12960 return DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, res);
12966 /// PerformEXTRACT_VECTOR_ELTCombine - Detect vector gather/scatter index
12967 /// generation and convert it from being a bunch of shuffles and extracts
12968 /// to a simple store and scalar loads to extract the elements.
12969 static SDValue PerformEXTRACT_VECTOR_ELTCombine(SDNode *N, SelectionDAG &DAG,
12970 const TargetLowering &TLI) {
12971 SDValue InputVector = N->getOperand(0);
12973 // Only operate on vectors of 4 elements, where the alternative shuffling
12974 // gets to be more expensive.
12975 if (InputVector.getValueType() != MVT::v4i32)
12978 // Check whether every use of InputVector is an EXTRACT_VECTOR_ELT with a
12979 // single use which is a sign-extend or zero-extend, and all elements are
12981 SmallVector<SDNode *, 4> Uses;
12982 unsigned ExtractedElements = 0;
12983 for (SDNode::use_iterator UI = InputVector.getNode()->use_begin(),
12984 UE = InputVector.getNode()->use_end(); UI != UE; ++UI) {
12985 if (UI.getUse().getResNo() != InputVector.getResNo())
12988 SDNode *Extract = *UI;
12989 if (Extract->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
12992 if (Extract->getValueType(0) != MVT::i32)
12994 if (!Extract->hasOneUse())
12996 if (Extract->use_begin()->getOpcode() != ISD::SIGN_EXTEND &&
12997 Extract->use_begin()->getOpcode() != ISD::ZERO_EXTEND)
12999 if (!isa<ConstantSDNode>(Extract->getOperand(1)))
13002 // Record which element was extracted.
13003 ExtractedElements |=
13004 1 << cast<ConstantSDNode>(Extract->getOperand(1))->getZExtValue();
13006 Uses.push_back(Extract);
13009 // If not all the elements were used, this may not be worthwhile.
13010 if (ExtractedElements != 15)
13013 // Ok, we've now decided to do the transformation.
13014 DebugLoc dl = InputVector.getDebugLoc();
13016 // Store the value to a temporary stack slot.
13017 SDValue StackPtr = DAG.CreateStackTemporary(InputVector.getValueType());
13018 SDValue Ch = DAG.getStore(DAG.getEntryNode(), dl, InputVector, StackPtr,
13019 MachinePointerInfo(), false, false, 0);
13021 // Replace each use (extract) with a load of the appropriate element.
13022 for (SmallVectorImpl<SDNode *>::iterator UI = Uses.begin(),
13023 UE = Uses.end(); UI != UE; ++UI) {
13024 SDNode *Extract = *UI;
13026 // cOMpute the element's address.
13027 SDValue Idx = Extract->getOperand(1);
13029 InputVector.getValueType().getVectorElementType().getSizeInBits()/8;
13030 uint64_t Offset = EltSize * cast<ConstantSDNode>(Idx)->getZExtValue();
13031 SDValue OffsetVal = DAG.getConstant(Offset, TLI.getPointerTy());
13033 SDValue ScalarAddr = DAG.getNode(ISD::ADD, dl, TLI.getPointerTy(),
13034 StackPtr, OffsetVal);
13036 // Load the scalar.
13037 SDValue LoadScalar = DAG.getLoad(Extract->getValueType(0), dl, Ch,
13038 ScalarAddr, MachinePointerInfo(),
13039 false, false, false, 0);
13041 // Replace the exact with the load.
13042 DAG.ReplaceAllUsesOfValueWith(SDValue(Extract, 0), LoadScalar);
13045 // The replacement was made in place; don't return anything.
13049 /// PerformSELECTCombine - Do target-specific dag combines on SELECT and VSELECT
13051 static SDValue PerformSELECTCombine(SDNode *N, SelectionDAG &DAG,
13052 TargetLowering::DAGCombinerInfo &DCI,
13053 const X86Subtarget *Subtarget) {
13054 DebugLoc DL = N->getDebugLoc();
13055 SDValue Cond = N->getOperand(0);
13056 // Get the LHS/RHS of the select.
13057 SDValue LHS = N->getOperand(1);
13058 SDValue RHS = N->getOperand(2);
13059 EVT VT = LHS.getValueType();
13061 // If we have SSE[12] support, try to form min/max nodes. SSE min/max
13062 // instructions match the semantics of the common C idiom x<y?x:y but not
13063 // x<=y?x:y, because of how they handle negative zero (which can be
13064 // ignored in unsafe-math mode).
13065 if (Cond.getOpcode() == ISD::SETCC && VT.isFloatingPoint() &&
13066 VT != MVT::f80 && DAG.getTargetLoweringInfo().isTypeLegal(VT) &&
13067 (Subtarget->hasSSE2() ||
13068 (Subtarget->hasSSE1() && VT.getScalarType() == MVT::f32))) {
13069 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
13071 unsigned Opcode = 0;
13072 // Check for x CC y ? x : y.
13073 if (DAG.isEqualTo(LHS, Cond.getOperand(0)) &&
13074 DAG.isEqualTo(RHS, Cond.getOperand(1))) {
13078 // Converting this to a min would handle NaNs incorrectly, and swapping
13079 // the operands would cause it to handle comparisons between positive
13080 // and negative zero incorrectly.
13081 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) {
13082 if (!DAG.getTarget().Options.UnsafeFPMath &&
13083 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
13085 std::swap(LHS, RHS);
13087 Opcode = X86ISD::FMIN;
13090 // Converting this to a min would handle comparisons between positive
13091 // and negative zero incorrectly.
13092 if (!DAG.getTarget().Options.UnsafeFPMath &&
13093 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS))
13095 Opcode = X86ISD::FMIN;
13098 // Converting this to a min would handle both negative zeros and NaNs
13099 // incorrectly, but we can swap the operands to fix both.
13100 std::swap(LHS, RHS);
13104 Opcode = X86ISD::FMIN;
13108 // Converting this to a max would handle comparisons between positive
13109 // and negative zero incorrectly.
13110 if (!DAG.getTarget().Options.UnsafeFPMath &&
13111 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS))
13113 Opcode = X86ISD::FMAX;
13116 // Converting this to a max would handle NaNs incorrectly, and swapping
13117 // the operands would cause it to handle comparisons between positive
13118 // and negative zero incorrectly.
13119 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) {
13120 if (!DAG.getTarget().Options.UnsafeFPMath &&
13121 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
13123 std::swap(LHS, RHS);
13125 Opcode = X86ISD::FMAX;
13128 // Converting this to a max would handle both negative zeros and NaNs
13129 // incorrectly, but we can swap the operands to fix both.
13130 std::swap(LHS, RHS);
13134 Opcode = X86ISD::FMAX;
13137 // Check for x CC y ? y : x -- a min/max with reversed arms.
13138 } else if (DAG.isEqualTo(LHS, Cond.getOperand(1)) &&
13139 DAG.isEqualTo(RHS, Cond.getOperand(0))) {
13143 // Converting this to a min would handle comparisons between positive
13144 // and negative zero incorrectly, and swapping the operands would
13145 // cause it to handle NaNs incorrectly.
13146 if (!DAG.getTarget().Options.UnsafeFPMath &&
13147 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS))) {
13148 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
13150 std::swap(LHS, RHS);
13152 Opcode = X86ISD::FMIN;
13155 // Converting this to a min would handle NaNs incorrectly.
13156 if (!DAG.getTarget().Options.UnsafeFPMath &&
13157 (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)))
13159 Opcode = X86ISD::FMIN;
13162 // Converting this to a min would handle both negative zeros and NaNs
13163 // incorrectly, but we can swap the operands to fix both.
13164 std::swap(LHS, RHS);
13168 Opcode = X86ISD::FMIN;
13172 // Converting this to a max would handle NaNs incorrectly.
13173 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
13175 Opcode = X86ISD::FMAX;
13178 // Converting this to a max would handle comparisons between positive
13179 // and negative zero incorrectly, and swapping the operands would
13180 // cause it to handle NaNs incorrectly.
13181 if (!DAG.getTarget().Options.UnsafeFPMath &&
13182 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS)) {
13183 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
13185 std::swap(LHS, RHS);
13187 Opcode = X86ISD::FMAX;
13190 // Converting this to a max would handle both negative zeros and NaNs
13191 // incorrectly, but we can swap the operands to fix both.
13192 std::swap(LHS, RHS);
13196 Opcode = X86ISD::FMAX;
13202 return DAG.getNode(Opcode, DL, N->getValueType(0), LHS, RHS);
13205 // If this is a select between two integer constants, try to do some
13207 if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(LHS)) {
13208 if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(RHS))
13209 // Don't do this for crazy integer types.
13210 if (DAG.getTargetLoweringInfo().isTypeLegal(LHS.getValueType())) {
13211 // If this is efficiently invertible, canonicalize the LHSC/RHSC values
13212 // so that TrueC (the true value) is larger than FalseC.
13213 bool NeedsCondInvert = false;
13215 if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue()) &&
13216 // Efficiently invertible.
13217 (Cond.getOpcode() == ISD::SETCC || // setcc -> invertible.
13218 (Cond.getOpcode() == ISD::XOR && // xor(X, C) -> invertible.
13219 isa<ConstantSDNode>(Cond.getOperand(1))))) {
13220 NeedsCondInvert = true;
13221 std::swap(TrueC, FalseC);
13224 // Optimize C ? 8 : 0 -> zext(C) << 3. Likewise for any pow2/0.
13225 if (FalseC->getAPIntValue() == 0 &&
13226 TrueC->getAPIntValue().isPowerOf2()) {
13227 if (NeedsCondInvert) // Invert the condition if needed.
13228 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
13229 DAG.getConstant(1, Cond.getValueType()));
13231 // Zero extend the condition if needed.
13232 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, LHS.getValueType(), Cond);
13234 unsigned ShAmt = TrueC->getAPIntValue().logBase2();
13235 return DAG.getNode(ISD::SHL, DL, LHS.getValueType(), Cond,
13236 DAG.getConstant(ShAmt, MVT::i8));
13239 // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst.
13240 if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) {
13241 if (NeedsCondInvert) // Invert the condition if needed.
13242 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
13243 DAG.getConstant(1, Cond.getValueType()));
13245 // Zero extend the condition if needed.
13246 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL,
13247 FalseC->getValueType(0), Cond);
13248 return DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
13249 SDValue(FalseC, 0));
13252 // Optimize cases that will turn into an LEA instruction. This requires
13253 // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9).
13254 if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) {
13255 uint64_t Diff = TrueC->getZExtValue()-FalseC->getZExtValue();
13256 if (N->getValueType(0) == MVT::i32) Diff = (unsigned)Diff;
13258 bool isFastMultiplier = false;
13260 switch ((unsigned char)Diff) {
13262 case 1: // result = add base, cond
13263 case 2: // result = lea base( , cond*2)
13264 case 3: // result = lea base(cond, cond*2)
13265 case 4: // result = lea base( , cond*4)
13266 case 5: // result = lea base(cond, cond*4)
13267 case 8: // result = lea base( , cond*8)
13268 case 9: // result = lea base(cond, cond*8)
13269 isFastMultiplier = true;
13274 if (isFastMultiplier) {
13275 APInt Diff = TrueC->getAPIntValue()-FalseC->getAPIntValue();
13276 if (NeedsCondInvert) // Invert the condition if needed.
13277 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
13278 DAG.getConstant(1, Cond.getValueType()));
13280 // Zero extend the condition if needed.
13281 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0),
13283 // Scale the condition by the difference.
13285 Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond,
13286 DAG.getConstant(Diff, Cond.getValueType()));
13288 // Add the base if non-zero.
13289 if (FalseC->getAPIntValue() != 0)
13290 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
13291 SDValue(FalseC, 0));
13298 // Canonicalize max and min:
13299 // (x > y) ? x : y -> (x >= y) ? x : y
13300 // (x < y) ? x : y -> (x <= y) ? x : y
13301 // This allows use of COND_S / COND_NS (see TranslateX86CC) which eliminates
13302 // the need for an extra compare
13303 // against zero. e.g.
13304 // (x - y) > 0 : (x - y) ? 0 -> (x - y) >= 0 : (x - y) ? 0
13306 // testl %edi, %edi
13308 // cmovgl %edi, %eax
13312 // cmovsl %eax, %edi
13313 if (N->getOpcode() == ISD::SELECT && Cond.getOpcode() == ISD::SETCC &&
13314 DAG.isEqualTo(LHS, Cond.getOperand(0)) &&
13315 DAG.isEqualTo(RHS, Cond.getOperand(1))) {
13316 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
13321 ISD::CondCode NewCC = (CC == ISD::SETLT) ? ISD::SETLE : ISD::SETGE;
13322 Cond = DAG.getSetCC(Cond.getDebugLoc(), Cond.getValueType(),
13323 Cond.getOperand(0), Cond.getOperand(1), NewCC);
13324 return DAG.getNode(ISD::SELECT, DL, VT, Cond, LHS, RHS);
13329 // If we know that this node is legal then we know that it is going to be
13330 // matched by one of the SSE/AVX BLEND instructions. These instructions only
13331 // depend on the highest bit in each word. Try to use SimplifyDemandedBits
13332 // to simplify previous instructions.
13333 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
13334 if (N->getOpcode() == ISD::VSELECT && DCI.isBeforeLegalizeOps() &&
13335 !DCI.isBeforeLegalize() &&
13336 TLI.isOperationLegal(ISD::VSELECT, VT)) {
13337 unsigned BitWidth = Cond.getValueType().getScalarType().getSizeInBits();
13338 assert(BitWidth >= 8 && BitWidth <= 64 && "Invalid mask size");
13339 APInt DemandedMask = APInt::getHighBitsSet(BitWidth, 1);
13341 APInt KnownZero, KnownOne;
13342 TargetLowering::TargetLoweringOpt TLO(DAG, DCI.isBeforeLegalize(),
13343 DCI.isBeforeLegalizeOps());
13344 if (TLO.ShrinkDemandedConstant(Cond, DemandedMask) ||
13345 TLI.SimplifyDemandedBits(Cond, DemandedMask, KnownZero, KnownOne, TLO))
13346 DCI.CommitTargetLoweringOpt(TLO);
13352 /// Optimize X86ISD::CMOV [LHS, RHS, CONDCODE (e.g. X86::COND_NE), CONDVAL]
13353 static SDValue PerformCMOVCombine(SDNode *N, SelectionDAG &DAG,
13354 TargetLowering::DAGCombinerInfo &DCI) {
13355 DebugLoc DL = N->getDebugLoc();
13357 // If the flag operand isn't dead, don't touch this CMOV.
13358 if (N->getNumValues() == 2 && !SDValue(N, 1).use_empty())
13361 SDValue FalseOp = N->getOperand(0);
13362 SDValue TrueOp = N->getOperand(1);
13363 X86::CondCode CC = (X86::CondCode)N->getConstantOperandVal(2);
13364 SDValue Cond = N->getOperand(3);
13365 if (CC == X86::COND_E || CC == X86::COND_NE) {
13366 switch (Cond.getOpcode()) {
13370 // If operand of BSR / BSF are proven never zero, then ZF cannot be set.
13371 if (DAG.isKnownNeverZero(Cond.getOperand(0)))
13372 return (CC == X86::COND_E) ? FalseOp : TrueOp;
13376 // If this is a select between two integer constants, try to do some
13377 // optimizations. Note that the operands are ordered the opposite of SELECT
13379 if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(TrueOp)) {
13380 if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(FalseOp)) {
13381 // Canonicalize the TrueC/FalseC values so that TrueC (the true value) is
13382 // larger than FalseC (the false value).
13383 if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue())) {
13384 CC = X86::GetOppositeBranchCondition(CC);
13385 std::swap(TrueC, FalseC);
13388 // Optimize C ? 8 : 0 -> zext(setcc(C)) << 3. Likewise for any pow2/0.
13389 // This is efficient for any integer data type (including i8/i16) and
13391 if (FalseC->getAPIntValue() == 0 && TrueC->getAPIntValue().isPowerOf2()) {
13392 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
13393 DAG.getConstant(CC, MVT::i8), Cond);
13395 // Zero extend the condition if needed.
13396 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, TrueC->getValueType(0), Cond);
13398 unsigned ShAmt = TrueC->getAPIntValue().logBase2();
13399 Cond = DAG.getNode(ISD::SHL, DL, Cond.getValueType(), Cond,
13400 DAG.getConstant(ShAmt, MVT::i8));
13401 if (N->getNumValues() == 2) // Dead flag value?
13402 return DCI.CombineTo(N, Cond, SDValue());
13406 // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst. This is efficient
13407 // for any integer data type, including i8/i16.
13408 if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) {
13409 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
13410 DAG.getConstant(CC, MVT::i8), Cond);
13412 // Zero extend the condition if needed.
13413 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL,
13414 FalseC->getValueType(0), Cond);
13415 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
13416 SDValue(FalseC, 0));
13418 if (N->getNumValues() == 2) // Dead flag value?
13419 return DCI.CombineTo(N, Cond, SDValue());
13423 // Optimize cases that will turn into an LEA instruction. This requires
13424 // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9).
13425 if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) {
13426 uint64_t Diff = TrueC->getZExtValue()-FalseC->getZExtValue();
13427 if (N->getValueType(0) == MVT::i32) Diff = (unsigned)Diff;
13429 bool isFastMultiplier = false;
13431 switch ((unsigned char)Diff) {
13433 case 1: // result = add base, cond
13434 case 2: // result = lea base( , cond*2)
13435 case 3: // result = lea base(cond, cond*2)
13436 case 4: // result = lea base( , cond*4)
13437 case 5: // result = lea base(cond, cond*4)
13438 case 8: // result = lea base( , cond*8)
13439 case 9: // result = lea base(cond, cond*8)
13440 isFastMultiplier = true;
13445 if (isFastMultiplier) {
13446 APInt Diff = TrueC->getAPIntValue()-FalseC->getAPIntValue();
13447 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
13448 DAG.getConstant(CC, MVT::i8), Cond);
13449 // Zero extend the condition if needed.
13450 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0),
13452 // Scale the condition by the difference.
13454 Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond,
13455 DAG.getConstant(Diff, Cond.getValueType()));
13457 // Add the base if non-zero.
13458 if (FalseC->getAPIntValue() != 0)
13459 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
13460 SDValue(FalseC, 0));
13461 if (N->getNumValues() == 2) // Dead flag value?
13462 return DCI.CombineTo(N, Cond, SDValue());
13472 /// PerformMulCombine - Optimize a single multiply with constant into two
13473 /// in order to implement it with two cheaper instructions, e.g.
13474 /// LEA + SHL, LEA + LEA.
13475 static SDValue PerformMulCombine(SDNode *N, SelectionDAG &DAG,
13476 TargetLowering::DAGCombinerInfo &DCI) {
13477 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
13480 EVT VT = N->getValueType(0);
13481 if (VT != MVT::i64)
13484 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1));
13487 uint64_t MulAmt = C->getZExtValue();
13488 if (isPowerOf2_64(MulAmt) || MulAmt == 3 || MulAmt == 5 || MulAmt == 9)
13491 uint64_t MulAmt1 = 0;
13492 uint64_t MulAmt2 = 0;
13493 if ((MulAmt % 9) == 0) {
13495 MulAmt2 = MulAmt / 9;
13496 } else if ((MulAmt % 5) == 0) {
13498 MulAmt2 = MulAmt / 5;
13499 } else if ((MulAmt % 3) == 0) {
13501 MulAmt2 = MulAmt / 3;
13504 (isPowerOf2_64(MulAmt2) || MulAmt2 == 3 || MulAmt2 == 5 || MulAmt2 == 9)){
13505 DebugLoc DL = N->getDebugLoc();
13507 if (isPowerOf2_64(MulAmt2) &&
13508 !(N->hasOneUse() && N->use_begin()->getOpcode() == ISD::ADD))
13509 // If second multiplifer is pow2, issue it first. We want the multiply by
13510 // 3, 5, or 9 to be folded into the addressing mode unless the lone use
13512 std::swap(MulAmt1, MulAmt2);
13515 if (isPowerOf2_64(MulAmt1))
13516 NewMul = DAG.getNode(ISD::SHL, DL, VT, N->getOperand(0),
13517 DAG.getConstant(Log2_64(MulAmt1), MVT::i8));
13519 NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, N->getOperand(0),
13520 DAG.getConstant(MulAmt1, VT));
13522 if (isPowerOf2_64(MulAmt2))
13523 NewMul = DAG.getNode(ISD::SHL, DL, VT, NewMul,
13524 DAG.getConstant(Log2_64(MulAmt2), MVT::i8));
13526 NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, NewMul,
13527 DAG.getConstant(MulAmt2, VT));
13529 // Do not add new nodes to DAG combiner worklist.
13530 DCI.CombineTo(N, NewMul, false);
13535 static SDValue PerformSHLCombine(SDNode *N, SelectionDAG &DAG) {
13536 SDValue N0 = N->getOperand(0);
13537 SDValue N1 = N->getOperand(1);
13538 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
13539 EVT VT = N0.getValueType();
13541 // fold (shl (and (setcc_c), c1), c2) -> (and setcc_c, (c1 << c2))
13542 // since the result of setcc_c is all zero's or all ones.
13543 if (VT.isInteger() && !VT.isVector() &&
13544 N1C && N0.getOpcode() == ISD::AND &&
13545 N0.getOperand(1).getOpcode() == ISD::Constant) {
13546 SDValue N00 = N0.getOperand(0);
13547 if (N00.getOpcode() == X86ISD::SETCC_CARRY ||
13548 ((N00.getOpcode() == ISD::ANY_EXTEND ||
13549 N00.getOpcode() == ISD::ZERO_EXTEND) &&
13550 N00.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY)) {
13551 APInt Mask = cast<ConstantSDNode>(N0.getOperand(1))->getAPIntValue();
13552 APInt ShAmt = N1C->getAPIntValue();
13553 Mask = Mask.shl(ShAmt);
13555 return DAG.getNode(ISD::AND, N->getDebugLoc(), VT,
13556 N00, DAG.getConstant(Mask, VT));
13561 // Hardware support for vector shifts is sparse which makes us scalarize the
13562 // vector operations in many cases. Also, on sandybridge ADD is faster than
13564 // (shl V, 1) -> add V,V
13565 if (isSplatVector(N1.getNode())) {
13566 assert(N0.getValueType().isVector() && "Invalid vector shift type");
13567 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1->getOperand(0));
13568 // We shift all of the values by one. In many cases we do not have
13569 // hardware support for this operation. This is better expressed as an ADD
13571 if (N1C && (1 == N1C->getZExtValue())) {
13572 return DAG.getNode(ISD::ADD, N->getDebugLoc(), VT, N0, N0);
13579 /// PerformShiftCombine - Transforms vector shift nodes to use vector shifts
13581 static SDValue PerformShiftCombine(SDNode* N, SelectionDAG &DAG,
13582 TargetLowering::DAGCombinerInfo &DCI,
13583 const X86Subtarget *Subtarget) {
13584 EVT VT = N->getValueType(0);
13585 if (N->getOpcode() == ISD::SHL) {
13586 SDValue V = PerformSHLCombine(N, DAG);
13587 if (V.getNode()) return V;
13590 // On X86 with SSE2 support, we can transform this to a vector shift if
13591 // all elements are shifted by the same amount. We can't do this in legalize
13592 // because the a constant vector is typically transformed to a constant pool
13593 // so we have no knowledge of the shift amount.
13594 if (!Subtarget->hasSSE2())
13597 if (VT != MVT::v2i64 && VT != MVT::v4i32 && VT != MVT::v8i16 &&
13598 (!Subtarget->hasAVX2() ||
13599 (VT != MVT::v4i64 && VT != MVT::v8i32 && VT != MVT::v16i16)))
13602 SDValue ShAmtOp = N->getOperand(1);
13603 EVT EltVT = VT.getVectorElementType();
13604 DebugLoc DL = N->getDebugLoc();
13605 SDValue BaseShAmt = SDValue();
13606 if (ShAmtOp.getOpcode() == ISD::BUILD_VECTOR) {
13607 unsigned NumElts = VT.getVectorNumElements();
13609 for (; i != NumElts; ++i) {
13610 SDValue Arg = ShAmtOp.getOperand(i);
13611 if (Arg.getOpcode() == ISD::UNDEF) continue;
13615 // Handle the case where the build_vector is all undef
13616 // FIXME: Should DAG allow this?
13620 for (; i != NumElts; ++i) {
13621 SDValue Arg = ShAmtOp.getOperand(i);
13622 if (Arg.getOpcode() == ISD::UNDEF) continue;
13623 if (Arg != BaseShAmt) {
13627 } else if (ShAmtOp.getOpcode() == ISD::VECTOR_SHUFFLE &&
13628 cast<ShuffleVectorSDNode>(ShAmtOp)->isSplat()) {
13629 SDValue InVec = ShAmtOp.getOperand(0);
13630 if (InVec.getOpcode() == ISD::BUILD_VECTOR) {
13631 unsigned NumElts = InVec.getValueType().getVectorNumElements();
13633 for (; i != NumElts; ++i) {
13634 SDValue Arg = InVec.getOperand(i);
13635 if (Arg.getOpcode() == ISD::UNDEF) continue;
13639 } else if (InVec.getOpcode() == ISD::INSERT_VECTOR_ELT) {
13640 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(InVec.getOperand(2))) {
13641 unsigned SplatIdx= cast<ShuffleVectorSDNode>(ShAmtOp)->getSplatIndex();
13642 if (C->getZExtValue() == SplatIdx)
13643 BaseShAmt = InVec.getOperand(1);
13646 if (BaseShAmt.getNode() == 0) {
13647 // Don't create instructions with illegal types after legalize
13649 if (!DAG.getTargetLoweringInfo().isTypeLegal(EltVT) &&
13650 !DCI.isBeforeLegalize())
13653 BaseShAmt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, EltVT, ShAmtOp,
13654 DAG.getIntPtrConstant(0));
13659 // The shift amount is an i32.
13660 if (EltVT.bitsGT(MVT::i32))
13661 BaseShAmt = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, BaseShAmt);
13662 else if (EltVT.bitsLT(MVT::i32))
13663 BaseShAmt = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i32, BaseShAmt);
13665 // The shift amount is identical so we can do a vector shift.
13666 SDValue ValOp = N->getOperand(0);
13667 switch (N->getOpcode()) {
13669 llvm_unreachable("Unknown shift opcode!");
13671 switch (VT.getSimpleVT().SimpleTy) {
13672 default: return SDValue();
13679 return getTargetVShiftNode(X86ISD::VSHLI, DL, VT, ValOp, BaseShAmt, DAG);
13682 switch (VT.getSimpleVT().SimpleTy) {
13683 default: return SDValue();
13688 return getTargetVShiftNode(X86ISD::VSRAI, DL, VT, ValOp, BaseShAmt, DAG);
13691 switch (VT.getSimpleVT().SimpleTy) {
13692 default: return SDValue();
13699 return getTargetVShiftNode(X86ISD::VSRLI, DL, VT, ValOp, BaseShAmt, DAG);
13705 // CMPEQCombine - Recognize the distinctive (AND (setcc ...) (setcc ..))
13706 // where both setccs reference the same FP CMP, and rewrite for CMPEQSS
13707 // and friends. Likewise for OR -> CMPNEQSS.
13708 static SDValue CMPEQCombine(SDNode *N, SelectionDAG &DAG,
13709 TargetLowering::DAGCombinerInfo &DCI,
13710 const X86Subtarget *Subtarget) {
13713 // SSE1 supports CMP{eq|ne}SS, and SSE2 added CMP{eq|ne}SD, but
13714 // we're requiring SSE2 for both.
13715 if (Subtarget->hasSSE2() && isAndOrOfSetCCs(SDValue(N, 0U), opcode)) {
13716 SDValue N0 = N->getOperand(0);
13717 SDValue N1 = N->getOperand(1);
13718 SDValue CMP0 = N0->getOperand(1);
13719 SDValue CMP1 = N1->getOperand(1);
13720 DebugLoc DL = N->getDebugLoc();
13722 // The SETCCs should both refer to the same CMP.
13723 if (CMP0.getOpcode() != X86ISD::CMP || CMP0 != CMP1)
13726 SDValue CMP00 = CMP0->getOperand(0);
13727 SDValue CMP01 = CMP0->getOperand(1);
13728 EVT VT = CMP00.getValueType();
13730 if (VT == MVT::f32 || VT == MVT::f64) {
13731 bool ExpectingFlags = false;
13732 // Check for any users that want flags:
13733 for (SDNode::use_iterator UI = N->use_begin(),
13735 !ExpectingFlags && UI != UE; ++UI)
13736 switch (UI->getOpcode()) {
13741 ExpectingFlags = true;
13743 case ISD::CopyToReg:
13744 case ISD::SIGN_EXTEND:
13745 case ISD::ZERO_EXTEND:
13746 case ISD::ANY_EXTEND:
13750 if (!ExpectingFlags) {
13751 enum X86::CondCode cc0 = (enum X86::CondCode)N0.getConstantOperandVal(0);
13752 enum X86::CondCode cc1 = (enum X86::CondCode)N1.getConstantOperandVal(0);
13754 if (cc1 == X86::COND_E || cc1 == X86::COND_NE) {
13755 X86::CondCode tmp = cc0;
13760 if ((cc0 == X86::COND_E && cc1 == X86::COND_NP) ||
13761 (cc0 == X86::COND_NE && cc1 == X86::COND_P)) {
13762 bool is64BitFP = (CMP00.getValueType() == MVT::f64);
13763 X86ISD::NodeType NTOperator = is64BitFP ?
13764 X86ISD::FSETCCsd : X86ISD::FSETCCss;
13765 // FIXME: need symbolic constants for these magic numbers.
13766 // See X86ATTInstPrinter.cpp:printSSECC().
13767 unsigned x86cc = (cc0 == X86::COND_E) ? 0 : 4;
13768 SDValue OnesOrZeroesF = DAG.getNode(NTOperator, DL, MVT::f32, CMP00, CMP01,
13769 DAG.getConstant(x86cc, MVT::i8));
13770 SDValue OnesOrZeroesI = DAG.getNode(ISD::BITCAST, DL, MVT::i32,
13772 SDValue ANDed = DAG.getNode(ISD::AND, DL, MVT::i32, OnesOrZeroesI,
13773 DAG.getConstant(1, MVT::i32));
13774 SDValue OneBitOfTruth = DAG.getNode(ISD::TRUNCATE, DL, MVT::i8, ANDed);
13775 return OneBitOfTruth;
13783 /// CanFoldXORWithAllOnes - Test whether the XOR operand is a AllOnes vector
13784 /// so it can be folded inside ANDNP.
13785 static bool CanFoldXORWithAllOnes(const SDNode *N) {
13786 EVT VT = N->getValueType(0);
13788 // Match direct AllOnes for 128 and 256-bit vectors
13789 if (ISD::isBuildVectorAllOnes(N))
13792 // Look through a bit convert.
13793 if (N->getOpcode() == ISD::BITCAST)
13794 N = N->getOperand(0).getNode();
13796 // Sometimes the operand may come from a insert_subvector building a 256-bit
13798 if (VT.getSizeInBits() == 256 &&
13799 N->getOpcode() == ISD::INSERT_SUBVECTOR) {
13800 SDValue V1 = N->getOperand(0);
13801 SDValue V2 = N->getOperand(1);
13803 if (V1.getOpcode() == ISD::INSERT_SUBVECTOR &&
13804 V1.getOperand(0).getOpcode() == ISD::UNDEF &&
13805 ISD::isBuildVectorAllOnes(V1.getOperand(1).getNode()) &&
13806 ISD::isBuildVectorAllOnes(V2.getNode()))
13813 static SDValue PerformAndCombine(SDNode *N, SelectionDAG &DAG,
13814 TargetLowering::DAGCombinerInfo &DCI,
13815 const X86Subtarget *Subtarget) {
13816 if (DCI.isBeforeLegalizeOps())
13819 SDValue R = CMPEQCombine(N, DAG, DCI, Subtarget);
13823 EVT VT = N->getValueType(0);
13825 // Create ANDN, BLSI, and BLSR instructions
13826 // BLSI is X & (-X)
13827 // BLSR is X & (X-1)
13828 if (Subtarget->hasBMI() && (VT == MVT::i32 || VT == MVT::i64)) {
13829 SDValue N0 = N->getOperand(0);
13830 SDValue N1 = N->getOperand(1);
13831 DebugLoc DL = N->getDebugLoc();
13833 // Check LHS for not
13834 if (N0.getOpcode() == ISD::XOR && isAllOnes(N0.getOperand(1)))
13835 return DAG.getNode(X86ISD::ANDN, DL, VT, N0.getOperand(0), N1);
13836 // Check RHS for not
13837 if (N1.getOpcode() == ISD::XOR && isAllOnes(N1.getOperand(1)))
13838 return DAG.getNode(X86ISD::ANDN, DL, VT, N1.getOperand(0), N0);
13840 // Check LHS for neg
13841 if (N0.getOpcode() == ISD::SUB && N0.getOperand(1) == N1 &&
13842 isZero(N0.getOperand(0)))
13843 return DAG.getNode(X86ISD::BLSI, DL, VT, N1);
13845 // Check RHS for neg
13846 if (N1.getOpcode() == ISD::SUB && N1.getOperand(1) == N0 &&
13847 isZero(N1.getOperand(0)))
13848 return DAG.getNode(X86ISD::BLSI, DL, VT, N0);
13850 // Check LHS for X-1
13851 if (N0.getOpcode() == ISD::ADD && N0.getOperand(0) == N1 &&
13852 isAllOnes(N0.getOperand(1)))
13853 return DAG.getNode(X86ISD::BLSR, DL, VT, N1);
13855 // Check RHS for X-1
13856 if (N1.getOpcode() == ISD::ADD && N1.getOperand(0) == N0 &&
13857 isAllOnes(N1.getOperand(1)))
13858 return DAG.getNode(X86ISD::BLSR, DL, VT, N0);
13863 // Want to form ANDNP nodes:
13864 // 1) In the hopes of then easily combining them with OR and AND nodes
13865 // to form PBLEND/PSIGN.
13866 // 2) To match ANDN packed intrinsics
13867 if (VT != MVT::v2i64 && VT != MVT::v4i64)
13870 SDValue N0 = N->getOperand(0);
13871 SDValue N1 = N->getOperand(1);
13872 DebugLoc DL = N->getDebugLoc();
13874 // Check LHS for vnot
13875 if (N0.getOpcode() == ISD::XOR &&
13876 //ISD::isBuildVectorAllOnes(N0.getOperand(1).getNode()))
13877 CanFoldXORWithAllOnes(N0.getOperand(1).getNode()))
13878 return DAG.getNode(X86ISD::ANDNP, DL, VT, N0.getOperand(0), N1);
13880 // Check RHS for vnot
13881 if (N1.getOpcode() == ISD::XOR &&
13882 //ISD::isBuildVectorAllOnes(N1.getOperand(1).getNode()))
13883 CanFoldXORWithAllOnes(N1.getOperand(1).getNode()))
13884 return DAG.getNode(X86ISD::ANDNP, DL, VT, N1.getOperand(0), N0);
13889 static SDValue PerformOrCombine(SDNode *N, SelectionDAG &DAG,
13890 TargetLowering::DAGCombinerInfo &DCI,
13891 const X86Subtarget *Subtarget) {
13892 if (DCI.isBeforeLegalizeOps())
13895 SDValue R = CMPEQCombine(N, DAG, DCI, Subtarget);
13899 EVT VT = N->getValueType(0);
13901 SDValue N0 = N->getOperand(0);
13902 SDValue N1 = N->getOperand(1);
13904 // look for psign/blend
13905 if (VT == MVT::v2i64 || VT == MVT::v4i64) {
13906 if (!Subtarget->hasSSSE3() ||
13907 (VT == MVT::v4i64 && !Subtarget->hasAVX2()))
13910 // Canonicalize pandn to RHS
13911 if (N0.getOpcode() == X86ISD::ANDNP)
13913 // or (and (m, y), (pandn m, x))
13914 if (N0.getOpcode() == ISD::AND && N1.getOpcode() == X86ISD::ANDNP) {
13915 SDValue Mask = N1.getOperand(0);
13916 SDValue X = N1.getOperand(1);
13918 if (N0.getOperand(0) == Mask)
13919 Y = N0.getOperand(1);
13920 if (N0.getOperand(1) == Mask)
13921 Y = N0.getOperand(0);
13923 // Check to see if the mask appeared in both the AND and ANDNP and
13927 // Validate that X, Y, and Mask are BIT_CONVERTS, and see through them.
13928 if (Mask.getOpcode() != ISD::BITCAST ||
13929 X.getOpcode() != ISD::BITCAST ||
13930 Y.getOpcode() != ISD::BITCAST)
13933 // Look through mask bitcast.
13934 Mask = Mask.getOperand(0);
13935 EVT MaskVT = Mask.getValueType();
13937 // Validate that the Mask operand is a vector sra node.
13938 // FIXME: what to do for bytes, since there is a psignb/pblendvb, but
13939 // there is no psrai.b
13940 if (Mask.getOpcode() != X86ISD::VSRAI)
13943 // Check that the SRA is all signbits.
13944 SDValue SraC = Mask.getOperand(1);
13945 unsigned SraAmt = cast<ConstantSDNode>(SraC)->getZExtValue();
13946 unsigned EltBits = MaskVT.getVectorElementType().getSizeInBits();
13947 if ((SraAmt + 1) != EltBits)
13950 DebugLoc DL = N->getDebugLoc();
13952 // Now we know we at least have a plendvb with the mask val. See if
13953 // we can form a psignb/w/d.
13954 // psign = x.type == y.type == mask.type && y = sub(0, x);
13955 X = X.getOperand(0);
13956 Y = Y.getOperand(0);
13957 if (Y.getOpcode() == ISD::SUB && Y.getOperand(1) == X &&
13958 ISD::isBuildVectorAllZeros(Y.getOperand(0).getNode()) &&
13959 X.getValueType() == MaskVT && Y.getValueType() == MaskVT) {
13960 assert((EltBits == 8 || EltBits == 16 || EltBits == 32) &&
13961 "Unsupported VT for PSIGN");
13962 Mask = DAG.getNode(X86ISD::PSIGN, DL, MaskVT, X, Mask.getOperand(0));
13963 return DAG.getNode(ISD::BITCAST, DL, VT, Mask);
13965 // PBLENDVB only available on SSE 4.1
13966 if (!Subtarget->hasSSE41())
13969 EVT BlendVT = (VT == MVT::v4i64) ? MVT::v32i8 : MVT::v16i8;
13971 X = DAG.getNode(ISD::BITCAST, DL, BlendVT, X);
13972 Y = DAG.getNode(ISD::BITCAST, DL, BlendVT, Y);
13973 Mask = DAG.getNode(ISD::BITCAST, DL, BlendVT, Mask);
13974 Mask = DAG.getNode(ISD::VSELECT, DL, BlendVT, Mask, Y, X);
13975 return DAG.getNode(ISD::BITCAST, DL, VT, Mask);
13979 if (VT != MVT::i16 && VT != MVT::i32 && VT != MVT::i64)
13982 // fold (or (x << c) | (y >> (64 - c))) ==> (shld64 x, y, c)
13983 if (N0.getOpcode() == ISD::SRL && N1.getOpcode() == ISD::SHL)
13985 if (N0.getOpcode() != ISD::SHL || N1.getOpcode() != ISD::SRL)
13987 if (!N0.hasOneUse() || !N1.hasOneUse())
13990 SDValue ShAmt0 = N0.getOperand(1);
13991 if (ShAmt0.getValueType() != MVT::i8)
13993 SDValue ShAmt1 = N1.getOperand(1);
13994 if (ShAmt1.getValueType() != MVT::i8)
13996 if (ShAmt0.getOpcode() == ISD::TRUNCATE)
13997 ShAmt0 = ShAmt0.getOperand(0);
13998 if (ShAmt1.getOpcode() == ISD::TRUNCATE)
13999 ShAmt1 = ShAmt1.getOperand(0);
14001 DebugLoc DL = N->getDebugLoc();
14002 unsigned Opc = X86ISD::SHLD;
14003 SDValue Op0 = N0.getOperand(0);
14004 SDValue Op1 = N1.getOperand(0);
14005 if (ShAmt0.getOpcode() == ISD::SUB) {
14006 Opc = X86ISD::SHRD;
14007 std::swap(Op0, Op1);
14008 std::swap(ShAmt0, ShAmt1);
14011 unsigned Bits = VT.getSizeInBits();
14012 if (ShAmt1.getOpcode() == ISD::SUB) {
14013 SDValue Sum = ShAmt1.getOperand(0);
14014 if (ConstantSDNode *SumC = dyn_cast<ConstantSDNode>(Sum)) {
14015 SDValue ShAmt1Op1 = ShAmt1.getOperand(1);
14016 if (ShAmt1Op1.getNode()->getOpcode() == ISD::TRUNCATE)
14017 ShAmt1Op1 = ShAmt1Op1.getOperand(0);
14018 if (SumC->getSExtValue() == Bits && ShAmt1Op1 == ShAmt0)
14019 return DAG.getNode(Opc, DL, VT,
14021 DAG.getNode(ISD::TRUNCATE, DL,
14024 } else if (ConstantSDNode *ShAmt1C = dyn_cast<ConstantSDNode>(ShAmt1)) {
14025 ConstantSDNode *ShAmt0C = dyn_cast<ConstantSDNode>(ShAmt0);
14027 ShAmt0C->getSExtValue() + ShAmt1C->getSExtValue() == Bits)
14028 return DAG.getNode(Opc, DL, VT,
14029 N0.getOperand(0), N1.getOperand(0),
14030 DAG.getNode(ISD::TRUNCATE, DL,
14037 // PerformXorCombine - Attempts to turn XOR nodes into BLSMSK nodes
14038 static SDValue PerformXorCombine(SDNode *N, SelectionDAG &DAG,
14039 TargetLowering::DAGCombinerInfo &DCI,
14040 const X86Subtarget *Subtarget) {
14041 if (DCI.isBeforeLegalizeOps())
14044 EVT VT = N->getValueType(0);
14046 if (VT != MVT::i32 && VT != MVT::i64)
14049 assert(Subtarget->hasBMI() && "Creating BLSMSK requires BMI instructions");
14051 // Create BLSMSK instructions by finding X ^ (X-1)
14052 SDValue N0 = N->getOperand(0);
14053 SDValue N1 = N->getOperand(1);
14054 DebugLoc DL = N->getDebugLoc();
14056 if (N0.getOpcode() == ISD::ADD && N0.getOperand(0) == N1 &&
14057 isAllOnes(N0.getOperand(1)))
14058 return DAG.getNode(X86ISD::BLSMSK, DL, VT, N1);
14060 if (N1.getOpcode() == ISD::ADD && N1.getOperand(0) == N0 &&
14061 isAllOnes(N1.getOperand(1)))
14062 return DAG.getNode(X86ISD::BLSMSK, DL, VT, N0);
14067 /// PerformLOADCombine - Do target-specific dag combines on LOAD nodes.
14068 static SDValue PerformLOADCombine(SDNode *N, SelectionDAG &DAG,
14069 const X86Subtarget *Subtarget) {
14070 LoadSDNode *Ld = cast<LoadSDNode>(N);
14071 EVT RegVT = Ld->getValueType(0);
14072 EVT MemVT = Ld->getMemoryVT();
14073 DebugLoc dl = Ld->getDebugLoc();
14074 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
14076 ISD::LoadExtType Ext = Ld->getExtensionType();
14078 // If this is a vector EXT Load then attempt to optimize it using a
14079 // shuffle. We need SSE4 for the shuffles.
14080 // TODO: It is possible to support ZExt by zeroing the undef values
14081 // during the shuffle phase or after the shuffle.
14082 if (RegVT.isVector() && RegVT.isInteger() &&
14083 Ext == ISD::EXTLOAD && Subtarget->hasSSE41()) {
14084 assert(MemVT != RegVT && "Cannot extend to the same type");
14085 assert(MemVT.isVector() && "Must load a vector from memory");
14087 unsigned NumElems = RegVT.getVectorNumElements();
14088 unsigned RegSz = RegVT.getSizeInBits();
14089 unsigned MemSz = MemVT.getSizeInBits();
14090 assert(RegSz > MemSz && "Register size must be greater than the mem size");
14091 // All sizes must be a power of two
14092 if (!isPowerOf2_32(RegSz * MemSz * NumElems)) return SDValue();
14094 // Attempt to load the original value using a single load op.
14095 // Find a scalar type which is equal to the loaded word size.
14096 MVT SclrLoadTy = MVT::i8;
14097 for (unsigned tp = MVT::FIRST_INTEGER_VALUETYPE;
14098 tp < MVT::LAST_INTEGER_VALUETYPE; ++tp) {
14099 MVT Tp = (MVT::SimpleValueType)tp;
14100 if (TLI.isTypeLegal(Tp) && Tp.getSizeInBits() == MemSz) {
14106 // Proceed if a load word is found.
14107 if (SclrLoadTy.getSizeInBits() != MemSz) return SDValue();
14109 EVT LoadUnitVecVT = EVT::getVectorVT(*DAG.getContext(), SclrLoadTy,
14110 RegSz/SclrLoadTy.getSizeInBits());
14112 EVT WideVecVT = EVT::getVectorVT(*DAG.getContext(), MemVT.getScalarType(),
14113 RegSz/MemVT.getScalarType().getSizeInBits());
14114 // Can't shuffle using an illegal type.
14115 if (!TLI.isTypeLegal(WideVecVT)) return SDValue();
14117 // Perform a single load.
14118 SDValue ScalarLoad = DAG.getLoad(SclrLoadTy, dl, Ld->getChain(),
14120 Ld->getPointerInfo(), Ld->isVolatile(),
14121 Ld->isNonTemporal(), Ld->isInvariant(),
14122 Ld->getAlignment());
14124 // Insert the word loaded into a vector.
14125 SDValue ScalarInVector = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
14126 LoadUnitVecVT, ScalarLoad);
14128 // Bitcast the loaded value to a vector of the original element type, in
14129 // the size of the target vector type.
14130 SDValue SlicedVec = DAG.getNode(ISD::BITCAST, dl, WideVecVT,
14132 unsigned SizeRatio = RegSz/MemSz;
14134 // Redistribute the loaded elements into the different locations.
14135 SmallVector<int, 8> ShuffleVec(NumElems * SizeRatio, -1);
14136 for (unsigned i = 0; i < NumElems; i++) ShuffleVec[i*SizeRatio] = i;
14138 SDValue Shuff = DAG.getVectorShuffle(WideVecVT, dl, SlicedVec,
14139 DAG.getUNDEF(SlicedVec.getValueType()),
14140 ShuffleVec.data());
14142 // Bitcast to the requested type.
14143 Shuff = DAG.getNode(ISD::BITCAST, dl, RegVT, Shuff);
14144 // Replace the original load with the new sequence
14145 // and return the new chain.
14146 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 0), Shuff);
14147 return SDValue(ScalarLoad.getNode(), 1);
14153 /// PerformSTORECombine - Do target-specific dag combines on STORE nodes.
14154 static SDValue PerformSTORECombine(SDNode *N, SelectionDAG &DAG,
14155 const X86Subtarget *Subtarget) {
14156 StoreSDNode *St = cast<StoreSDNode>(N);
14157 EVT VT = St->getValue().getValueType();
14158 EVT StVT = St->getMemoryVT();
14159 DebugLoc dl = St->getDebugLoc();
14160 SDValue StoredVal = St->getOperand(1);
14161 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
14163 // If we are saving a concatenation of two XMM registers, perform two stores.
14164 // This is better in Sandy Bridge cause one 256-bit mem op is done via two
14165 // 128-bit ones. If in the future the cost becomes only one memory access the
14166 // first version would be better.
14167 if (VT.getSizeInBits() == 256 &&
14168 StoredVal.getNode()->getOpcode() == ISD::CONCAT_VECTORS &&
14169 StoredVal.getNumOperands() == 2) {
14171 SDValue Value0 = StoredVal.getOperand(0);
14172 SDValue Value1 = StoredVal.getOperand(1);
14174 SDValue Stride = DAG.getConstant(16, TLI.getPointerTy());
14175 SDValue Ptr0 = St->getBasePtr();
14176 SDValue Ptr1 = DAG.getNode(ISD::ADD, dl, Ptr0.getValueType(), Ptr0, Stride);
14178 SDValue Ch0 = DAG.getStore(St->getChain(), dl, Value0, Ptr0,
14179 St->getPointerInfo(), St->isVolatile(),
14180 St->isNonTemporal(), St->getAlignment());
14181 SDValue Ch1 = DAG.getStore(St->getChain(), dl, Value1, Ptr1,
14182 St->getPointerInfo(), St->isVolatile(),
14183 St->isNonTemporal(), St->getAlignment());
14184 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Ch0, Ch1);
14187 // Optimize trunc store (of multiple scalars) to shuffle and store.
14188 // First, pack all of the elements in one place. Next, store to memory
14189 // in fewer chunks.
14190 if (St->isTruncatingStore() && VT.isVector()) {
14191 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
14192 unsigned NumElems = VT.getVectorNumElements();
14193 assert(StVT != VT && "Cannot truncate to the same type");
14194 unsigned FromSz = VT.getVectorElementType().getSizeInBits();
14195 unsigned ToSz = StVT.getVectorElementType().getSizeInBits();
14197 // From, To sizes and ElemCount must be pow of two
14198 if (!isPowerOf2_32(NumElems * FromSz * ToSz)) return SDValue();
14199 // We are going to use the original vector elt for storing.
14200 // Accumulated smaller vector elements must be a multiple of the store size.
14201 if (0 != (NumElems * FromSz) % ToSz) return SDValue();
14203 unsigned SizeRatio = FromSz / ToSz;
14205 assert(SizeRatio * NumElems * ToSz == VT.getSizeInBits());
14207 // Create a type on which we perform the shuffle
14208 EVT WideVecVT = EVT::getVectorVT(*DAG.getContext(),
14209 StVT.getScalarType(), NumElems*SizeRatio);
14211 assert(WideVecVT.getSizeInBits() == VT.getSizeInBits());
14213 SDValue WideVec = DAG.getNode(ISD::BITCAST, dl, WideVecVT, St->getValue());
14214 SmallVector<int, 8> ShuffleVec(NumElems * SizeRatio, -1);
14215 for (unsigned i = 0; i < NumElems; i++ ) ShuffleVec[i] = i * SizeRatio;
14217 // Can't shuffle using an illegal type
14218 if (!TLI.isTypeLegal(WideVecVT)) return SDValue();
14220 SDValue Shuff = DAG.getVectorShuffle(WideVecVT, dl, WideVec,
14221 DAG.getUNDEF(WideVec.getValueType()),
14222 ShuffleVec.data());
14223 // At this point all of the data is stored at the bottom of the
14224 // register. We now need to save it to mem.
14226 // Find the largest store unit
14227 MVT StoreType = MVT::i8;
14228 for (unsigned tp = MVT::FIRST_INTEGER_VALUETYPE;
14229 tp < MVT::LAST_INTEGER_VALUETYPE; ++tp) {
14230 MVT Tp = (MVT::SimpleValueType)tp;
14231 if (TLI.isTypeLegal(Tp) && StoreType.getSizeInBits() < NumElems * ToSz)
14235 // Bitcast the original vector into a vector of store-size units
14236 EVT StoreVecVT = EVT::getVectorVT(*DAG.getContext(),
14237 StoreType, VT.getSizeInBits()/EVT(StoreType).getSizeInBits());
14238 assert(StoreVecVT.getSizeInBits() == VT.getSizeInBits());
14239 SDValue ShuffWide = DAG.getNode(ISD::BITCAST, dl, StoreVecVT, Shuff);
14240 SmallVector<SDValue, 8> Chains;
14241 SDValue Increment = DAG.getConstant(StoreType.getSizeInBits()/8,
14242 TLI.getPointerTy());
14243 SDValue Ptr = St->getBasePtr();
14245 // Perform one or more big stores into memory.
14246 for (unsigned i = 0; i < (ToSz*NumElems)/StoreType.getSizeInBits() ; i++) {
14247 SDValue SubVec = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl,
14248 StoreType, ShuffWide,
14249 DAG.getIntPtrConstant(i));
14250 SDValue Ch = DAG.getStore(St->getChain(), dl, SubVec, Ptr,
14251 St->getPointerInfo(), St->isVolatile(),
14252 St->isNonTemporal(), St->getAlignment());
14253 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr, Increment);
14254 Chains.push_back(Ch);
14257 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &Chains[0],
14262 // Turn load->store of MMX types into GPR load/stores. This avoids clobbering
14263 // the FP state in cases where an emms may be missing.
14264 // A preferable solution to the general problem is to figure out the right
14265 // places to insert EMMS. This qualifies as a quick hack.
14267 // Similarly, turn load->store of i64 into double load/stores in 32-bit mode.
14268 if (VT.getSizeInBits() != 64)
14271 const Function *F = DAG.getMachineFunction().getFunction();
14272 bool NoImplicitFloatOps = F->hasFnAttr(Attribute::NoImplicitFloat);
14273 bool F64IsLegal = !DAG.getTarget().Options.UseSoftFloat && !NoImplicitFloatOps
14274 && Subtarget->hasSSE2();
14275 if ((VT.isVector() ||
14276 (VT == MVT::i64 && F64IsLegal && !Subtarget->is64Bit())) &&
14277 isa<LoadSDNode>(St->getValue()) &&
14278 !cast<LoadSDNode>(St->getValue())->isVolatile() &&
14279 St->getChain().hasOneUse() && !St->isVolatile()) {
14280 SDNode* LdVal = St->getValue().getNode();
14281 LoadSDNode *Ld = 0;
14282 int TokenFactorIndex = -1;
14283 SmallVector<SDValue, 8> Ops;
14284 SDNode* ChainVal = St->getChain().getNode();
14285 // Must be a store of a load. We currently handle two cases: the load
14286 // is a direct child, and it's under an intervening TokenFactor. It is
14287 // possible to dig deeper under nested TokenFactors.
14288 if (ChainVal == LdVal)
14289 Ld = cast<LoadSDNode>(St->getChain());
14290 else if (St->getValue().hasOneUse() &&
14291 ChainVal->getOpcode() == ISD::TokenFactor) {
14292 for (unsigned i = 0, e = ChainVal->getNumOperands(); i != e; ++i) {
14293 if (ChainVal->getOperand(i).getNode() == LdVal) {
14294 TokenFactorIndex = i;
14295 Ld = cast<LoadSDNode>(St->getValue());
14297 Ops.push_back(ChainVal->getOperand(i));
14301 if (!Ld || !ISD::isNormalLoad(Ld))
14304 // If this is not the MMX case, i.e. we are just turning i64 load/store
14305 // into f64 load/store, avoid the transformation if there are multiple
14306 // uses of the loaded value.
14307 if (!VT.isVector() && !Ld->hasNUsesOfValue(1, 0))
14310 DebugLoc LdDL = Ld->getDebugLoc();
14311 DebugLoc StDL = N->getDebugLoc();
14312 // If we are a 64-bit capable x86, lower to a single movq load/store pair.
14313 // Otherwise, if it's legal to use f64 SSE instructions, use f64 load/store
14315 if (Subtarget->is64Bit() || F64IsLegal) {
14316 EVT LdVT = Subtarget->is64Bit() ? MVT::i64 : MVT::f64;
14317 SDValue NewLd = DAG.getLoad(LdVT, LdDL, Ld->getChain(), Ld->getBasePtr(),
14318 Ld->getPointerInfo(), Ld->isVolatile(),
14319 Ld->isNonTemporal(), Ld->isInvariant(),
14320 Ld->getAlignment());
14321 SDValue NewChain = NewLd.getValue(1);
14322 if (TokenFactorIndex != -1) {
14323 Ops.push_back(NewChain);
14324 NewChain = DAG.getNode(ISD::TokenFactor, LdDL, MVT::Other, &Ops[0],
14327 return DAG.getStore(NewChain, StDL, NewLd, St->getBasePtr(),
14328 St->getPointerInfo(),
14329 St->isVolatile(), St->isNonTemporal(),
14330 St->getAlignment());
14333 // Otherwise, lower to two pairs of 32-bit loads / stores.
14334 SDValue LoAddr = Ld->getBasePtr();
14335 SDValue HiAddr = DAG.getNode(ISD::ADD, LdDL, MVT::i32, LoAddr,
14336 DAG.getConstant(4, MVT::i32));
14338 SDValue LoLd = DAG.getLoad(MVT::i32, LdDL, Ld->getChain(), LoAddr,
14339 Ld->getPointerInfo(),
14340 Ld->isVolatile(), Ld->isNonTemporal(),
14341 Ld->isInvariant(), Ld->getAlignment());
14342 SDValue HiLd = DAG.getLoad(MVT::i32, LdDL, Ld->getChain(), HiAddr,
14343 Ld->getPointerInfo().getWithOffset(4),
14344 Ld->isVolatile(), Ld->isNonTemporal(),
14346 MinAlign(Ld->getAlignment(), 4));
14348 SDValue NewChain = LoLd.getValue(1);
14349 if (TokenFactorIndex != -1) {
14350 Ops.push_back(LoLd);
14351 Ops.push_back(HiLd);
14352 NewChain = DAG.getNode(ISD::TokenFactor, LdDL, MVT::Other, &Ops[0],
14356 LoAddr = St->getBasePtr();
14357 HiAddr = DAG.getNode(ISD::ADD, StDL, MVT::i32, LoAddr,
14358 DAG.getConstant(4, MVT::i32));
14360 SDValue LoSt = DAG.getStore(NewChain, StDL, LoLd, LoAddr,
14361 St->getPointerInfo(),
14362 St->isVolatile(), St->isNonTemporal(),
14363 St->getAlignment());
14364 SDValue HiSt = DAG.getStore(NewChain, StDL, HiLd, HiAddr,
14365 St->getPointerInfo().getWithOffset(4),
14367 St->isNonTemporal(),
14368 MinAlign(St->getAlignment(), 4));
14369 return DAG.getNode(ISD::TokenFactor, StDL, MVT::Other, LoSt, HiSt);
14374 /// isHorizontalBinOp - Return 'true' if this vector operation is "horizontal"
14375 /// and return the operands for the horizontal operation in LHS and RHS. A
14376 /// horizontal operation performs the binary operation on successive elements
14377 /// of its first operand, then on successive elements of its second operand,
14378 /// returning the resulting values in a vector. For example, if
14379 /// A = < float a0, float a1, float a2, float a3 >
14381 /// B = < float b0, float b1, float b2, float b3 >
14382 /// then the result of doing a horizontal operation on A and B is
14383 /// A horizontal-op B = < a0 op a1, a2 op a3, b0 op b1, b2 op b3 >.
14384 /// In short, LHS and RHS are inspected to see if LHS op RHS is of the form
14385 /// A horizontal-op B, for some already available A and B, and if so then LHS is
14386 /// set to A, RHS to B, and the routine returns 'true'.
14387 /// Note that the binary operation should have the property that if one of the
14388 /// operands is UNDEF then the result is UNDEF.
14389 static bool isHorizontalBinOp(SDValue &LHS, SDValue &RHS, bool IsCommutative) {
14390 // Look for the following pattern: if
14391 // A = < float a0, float a1, float a2, float a3 >
14392 // B = < float b0, float b1, float b2, float b3 >
14394 // LHS = VECTOR_SHUFFLE A, B, <0, 2, 4, 6>
14395 // RHS = VECTOR_SHUFFLE A, B, <1, 3, 5, 7>
14396 // then LHS op RHS = < a0 op a1, a2 op a3, b0 op b1, b2 op b3 >
14397 // which is A horizontal-op B.
14399 // At least one of the operands should be a vector shuffle.
14400 if (LHS.getOpcode() != ISD::VECTOR_SHUFFLE &&
14401 RHS.getOpcode() != ISD::VECTOR_SHUFFLE)
14404 EVT VT = LHS.getValueType();
14406 assert((VT.is128BitVector() || VT.is256BitVector()) &&
14407 "Unsupported vector type for horizontal add/sub");
14409 // Handle 128 and 256-bit vector lengths. AVX defines horizontal add/sub to
14410 // operate independently on 128-bit lanes.
14411 unsigned NumElts = VT.getVectorNumElements();
14412 unsigned NumLanes = VT.getSizeInBits()/128;
14413 unsigned NumLaneElts = NumElts / NumLanes;
14414 assert((NumLaneElts % 2 == 0) &&
14415 "Vector type should have an even number of elements in each lane");
14416 unsigned HalfLaneElts = NumLaneElts/2;
14418 // View LHS in the form
14419 // LHS = VECTOR_SHUFFLE A, B, LMask
14420 // If LHS is not a shuffle then pretend it is the shuffle
14421 // LHS = VECTOR_SHUFFLE LHS, undef, <0, 1, ..., N-1>
14422 // NOTE: in what follows a default initialized SDValue represents an UNDEF of
14425 SmallVector<int, 16> LMask(NumElts);
14426 if (LHS.getOpcode() == ISD::VECTOR_SHUFFLE) {
14427 if (LHS.getOperand(0).getOpcode() != ISD::UNDEF)
14428 A = LHS.getOperand(0);
14429 if (LHS.getOperand(1).getOpcode() != ISD::UNDEF)
14430 B = LHS.getOperand(1);
14431 ArrayRef<int> Mask = cast<ShuffleVectorSDNode>(LHS.getNode())->getMask();
14432 std::copy(Mask.begin(), Mask.end(), LMask.begin());
14434 if (LHS.getOpcode() != ISD::UNDEF)
14436 for (unsigned i = 0; i != NumElts; ++i)
14440 // Likewise, view RHS in the form
14441 // RHS = VECTOR_SHUFFLE C, D, RMask
14443 SmallVector<int, 16> RMask(NumElts);
14444 if (RHS.getOpcode() == ISD::VECTOR_SHUFFLE) {
14445 if (RHS.getOperand(0).getOpcode() != ISD::UNDEF)
14446 C = RHS.getOperand(0);
14447 if (RHS.getOperand(1).getOpcode() != ISD::UNDEF)
14448 D = RHS.getOperand(1);
14449 ArrayRef<int> Mask = cast<ShuffleVectorSDNode>(RHS.getNode())->getMask();
14450 std::copy(Mask.begin(), Mask.end(), RMask.begin());
14452 if (RHS.getOpcode() != ISD::UNDEF)
14454 for (unsigned i = 0; i != NumElts; ++i)
14458 // Check that the shuffles are both shuffling the same vectors.
14459 if (!(A == C && B == D) && !(A == D && B == C))
14462 // If everything is UNDEF then bail out: it would be better to fold to UNDEF.
14463 if (!A.getNode() && !B.getNode())
14466 // If A and B occur in reverse order in RHS, then "swap" them (which means
14467 // rewriting the mask).
14469 CommuteVectorShuffleMask(RMask, NumElts);
14471 // At this point LHS and RHS are equivalent to
14472 // LHS = VECTOR_SHUFFLE A, B, LMask
14473 // RHS = VECTOR_SHUFFLE A, B, RMask
14474 // Check that the masks correspond to performing a horizontal operation.
14475 for (unsigned i = 0; i != NumElts; ++i) {
14476 int LIdx = LMask[i], RIdx = RMask[i];
14478 // Ignore any UNDEF components.
14479 if (LIdx < 0 || RIdx < 0 ||
14480 (!A.getNode() && (LIdx < (int)NumElts || RIdx < (int)NumElts)) ||
14481 (!B.getNode() && (LIdx >= (int)NumElts || RIdx >= (int)NumElts)))
14484 // Check that successive elements are being operated on. If not, this is
14485 // not a horizontal operation.
14486 unsigned Src = (i/HalfLaneElts) % 2; // each lane is split between srcs
14487 unsigned LaneStart = (i/NumLaneElts) * NumLaneElts;
14488 int Index = 2*(i%HalfLaneElts) + NumElts*Src + LaneStart;
14489 if (!(LIdx == Index && RIdx == Index + 1) &&
14490 !(IsCommutative && LIdx == Index + 1 && RIdx == Index))
14494 LHS = A.getNode() ? A : B; // If A is 'UNDEF', use B for it.
14495 RHS = B.getNode() ? B : A; // If B is 'UNDEF', use A for it.
14499 /// PerformFADDCombine - Do target-specific dag combines on floating point adds.
14500 static SDValue PerformFADDCombine(SDNode *N, SelectionDAG &DAG,
14501 const X86Subtarget *Subtarget) {
14502 EVT VT = N->getValueType(0);
14503 SDValue LHS = N->getOperand(0);
14504 SDValue RHS = N->getOperand(1);
14506 // Try to synthesize horizontal adds from adds of shuffles.
14507 if (((Subtarget->hasSSE3() && (VT == MVT::v4f32 || VT == MVT::v2f64)) ||
14508 (Subtarget->hasAVX() && (VT == MVT::v8f32 || VT == MVT::v4f64))) &&
14509 isHorizontalBinOp(LHS, RHS, true))
14510 return DAG.getNode(X86ISD::FHADD, N->getDebugLoc(), VT, LHS, RHS);
14514 /// PerformFSUBCombine - Do target-specific dag combines on floating point subs.
14515 static SDValue PerformFSUBCombine(SDNode *N, SelectionDAG &DAG,
14516 const X86Subtarget *Subtarget) {
14517 EVT VT = N->getValueType(0);
14518 SDValue LHS = N->getOperand(0);
14519 SDValue RHS = N->getOperand(1);
14521 // Try to synthesize horizontal subs from subs of shuffles.
14522 if (((Subtarget->hasSSE3() && (VT == MVT::v4f32 || VT == MVT::v2f64)) ||
14523 (Subtarget->hasAVX() && (VT == MVT::v8f32 || VT == MVT::v4f64))) &&
14524 isHorizontalBinOp(LHS, RHS, false))
14525 return DAG.getNode(X86ISD::FHSUB, N->getDebugLoc(), VT, LHS, RHS);
14529 /// PerformFORCombine - Do target-specific dag combines on X86ISD::FOR and
14530 /// X86ISD::FXOR nodes.
14531 static SDValue PerformFORCombine(SDNode *N, SelectionDAG &DAG) {
14532 assert(N->getOpcode() == X86ISD::FOR || N->getOpcode() == X86ISD::FXOR);
14533 // F[X]OR(0.0, x) -> x
14534 // F[X]OR(x, 0.0) -> x
14535 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
14536 if (C->getValueAPF().isPosZero())
14537 return N->getOperand(1);
14538 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
14539 if (C->getValueAPF().isPosZero())
14540 return N->getOperand(0);
14544 /// PerformFANDCombine - Do target-specific dag combines on X86ISD::FAND nodes.
14545 static SDValue PerformFANDCombine(SDNode *N, SelectionDAG &DAG) {
14546 // FAND(0.0, x) -> 0.0
14547 // FAND(x, 0.0) -> 0.0
14548 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
14549 if (C->getValueAPF().isPosZero())
14550 return N->getOperand(0);
14551 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
14552 if (C->getValueAPF().isPosZero())
14553 return N->getOperand(1);
14557 static SDValue PerformBTCombine(SDNode *N,
14559 TargetLowering::DAGCombinerInfo &DCI) {
14560 // BT ignores high bits in the bit index operand.
14561 SDValue Op1 = N->getOperand(1);
14562 if (Op1.hasOneUse()) {
14563 unsigned BitWidth = Op1.getValueSizeInBits();
14564 APInt DemandedMask = APInt::getLowBitsSet(BitWidth, Log2_32(BitWidth));
14565 APInt KnownZero, KnownOne;
14566 TargetLowering::TargetLoweringOpt TLO(DAG, !DCI.isBeforeLegalize(),
14567 !DCI.isBeforeLegalizeOps());
14568 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
14569 if (TLO.ShrinkDemandedConstant(Op1, DemandedMask) ||
14570 TLI.SimplifyDemandedBits(Op1, DemandedMask, KnownZero, KnownOne, TLO))
14571 DCI.CommitTargetLoweringOpt(TLO);
14576 static SDValue PerformVZEXT_MOVLCombine(SDNode *N, SelectionDAG &DAG) {
14577 SDValue Op = N->getOperand(0);
14578 if (Op.getOpcode() == ISD::BITCAST)
14579 Op = Op.getOperand(0);
14580 EVT VT = N->getValueType(0), OpVT = Op.getValueType();
14581 if (Op.getOpcode() == X86ISD::VZEXT_LOAD &&
14582 VT.getVectorElementType().getSizeInBits() ==
14583 OpVT.getVectorElementType().getSizeInBits()) {
14584 return DAG.getNode(ISD::BITCAST, N->getDebugLoc(), VT, Op);
14589 static SDValue PerformSExtCombine(SDNode *N, SelectionDAG &DAG,
14590 TargetLowering::DAGCombinerInfo &DCI,
14591 const X86Subtarget *Subtarget) {
14592 if (!DCI.isBeforeLegalizeOps())
14595 if (!Subtarget->hasAVX()) return SDValue();
14597 // Optimize vectors in AVX mode
14598 // Sign extend v8i16 to v8i32 and
14601 // Divide input vector into two parts
14602 // for v4i32 the shuffle mask will be { 0, 1, -1, -1} {2, 3, -1, -1}
14603 // use vpmovsx instruction to extend v4i32 -> v2i64; v8i16 -> v4i32
14604 // concat the vectors to original VT
14606 EVT VT = N->getValueType(0);
14607 SDValue Op = N->getOperand(0);
14608 EVT OpVT = Op.getValueType();
14609 DebugLoc dl = N->getDebugLoc();
14611 if (((VT == MVT::v4i64) && (OpVT == MVT::v4i32)) ||
14612 ((VT == MVT::v8i32) && (OpVT == MVT::v8i16))) {
14614 unsigned NumElems = OpVT.getVectorNumElements();
14615 SmallVector<int,8> ShufMask1(NumElems, -1);
14616 for (unsigned i=0; i< NumElems/2; i++) ShufMask1[i] = i;
14618 SDValue OpLo = DAG.getVectorShuffle(OpVT, dl, Op, DAG.getUNDEF(OpVT),
14621 SmallVector<int,8> ShufMask2(NumElems, -1);
14622 for (unsigned i=0; i< NumElems/2; i++) ShufMask2[i] = i+NumElems/2;
14624 SDValue OpHi = DAG.getVectorShuffle(OpVT, dl, Op, DAG.getUNDEF(OpVT),
14627 EVT HalfVT = EVT::getVectorVT(*DAG.getContext(), VT.getScalarType(),
14628 VT.getVectorNumElements()/2);
14630 OpLo = DAG.getNode(X86ISD::VSEXT_MOVL, dl, HalfVT, OpLo);
14631 OpHi = DAG.getNode(X86ISD::VSEXT_MOVL, dl, HalfVT, OpHi);
14633 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, OpLo, OpHi);
14638 static SDValue PerformZExtCombine(SDNode *N, SelectionDAG &DAG,
14639 const X86Subtarget *Subtarget) {
14640 // (i32 zext (and (i8 x86isd::setcc_carry), 1)) ->
14641 // (and (i32 x86isd::setcc_carry), 1)
14642 // This eliminates the zext. This transformation is necessary because
14643 // ISD::SETCC is always legalized to i8.
14644 DebugLoc dl = N->getDebugLoc();
14645 SDValue N0 = N->getOperand(0);
14646 EVT VT = N->getValueType(0);
14647 EVT OpVT = N0.getValueType();
14649 if (N0.getOpcode() == ISD::AND &&
14651 N0.getOperand(0).hasOneUse()) {
14652 SDValue N00 = N0.getOperand(0);
14653 if (N00.getOpcode() != X86ISD::SETCC_CARRY)
14655 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N0.getOperand(1));
14656 if (!C || C->getZExtValue() != 1)
14658 return DAG.getNode(ISD::AND, dl, VT,
14659 DAG.getNode(X86ISD::SETCC_CARRY, dl, VT,
14660 N00.getOperand(0), N00.getOperand(1)),
14661 DAG.getConstant(1, VT));
14663 // Optimize vectors in AVX mode:
14666 // Use vpunpcklwd for 4 lower elements v8i16 -> v4i32.
14667 // Use vpunpckhwd for 4 upper elements v8i16 -> v4i32.
14668 // Concat upper and lower parts.
14671 // Use vpunpckldq for 4 lower elements v4i32 -> v2i64.
14672 // Use vpunpckhdq for 4 upper elements v4i32 -> v2i64.
14673 // Concat upper and lower parts.
14675 if (Subtarget->hasAVX()) {
14677 if (((VT == MVT::v8i32) && (OpVT == MVT::v8i16)) ||
14678 ((VT == MVT::v4i64) && (OpVT == MVT::v4i32))) {
14680 SDValue ZeroVec = getZeroVector(OpVT, Subtarget, DAG, dl);
14681 SDValue OpLo = getTargetShuffleNode(X86ISD::UNPCKL, dl, OpVT, N0, ZeroVec, DAG);
14682 SDValue OpHi = getTargetShuffleNode(X86ISD::UNPCKH, dl, OpVT, N0, ZeroVec, DAG);
14684 EVT HVT = EVT::getVectorVT(*DAG.getContext(), VT.getVectorElementType(),
14685 VT.getVectorNumElements()/2);
14687 OpLo = DAG.getNode(ISD::BITCAST, dl, HVT, OpLo);
14688 OpHi = DAG.getNode(ISD::BITCAST, dl, HVT, OpHi);
14690 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, OpLo, OpHi);
14698 // Optimize RES = X86ISD::SETCC CONDCODE, EFLAG_INPUT
14699 static SDValue PerformSETCCCombine(SDNode *N, SelectionDAG &DAG) {
14700 unsigned X86CC = N->getConstantOperandVal(0);
14701 SDValue EFLAG = N->getOperand(1);
14702 DebugLoc DL = N->getDebugLoc();
14704 // Materialize "setb reg" as "sbb reg,reg", since it can be extended without
14705 // a zext and produces an all-ones bit which is more useful than 0/1 in some
14707 if (X86CC == X86::COND_B)
14708 return DAG.getNode(ISD::AND, DL, MVT::i8,
14709 DAG.getNode(X86ISD::SETCC_CARRY, DL, MVT::i8,
14710 DAG.getConstant(X86CC, MVT::i8), EFLAG),
14711 DAG.getConstant(1, MVT::i8));
14716 static SDValue PerformSINT_TO_FPCombine(SDNode *N, SelectionDAG &DAG,
14717 const X86TargetLowering *XTLI) {
14718 SDValue Op0 = N->getOperand(0);
14719 // Transform (SINT_TO_FP (i64 ...)) into an x87 operation if we have
14720 // a 32-bit target where SSE doesn't support i64->FP operations.
14721 if (Op0.getOpcode() == ISD::LOAD) {
14722 LoadSDNode *Ld = cast<LoadSDNode>(Op0.getNode());
14723 EVT VT = Ld->getValueType(0);
14724 if (!Ld->isVolatile() && !N->getValueType(0).isVector() &&
14725 ISD::isNON_EXTLoad(Op0.getNode()) && Op0.hasOneUse() &&
14726 !XTLI->getSubtarget()->is64Bit() &&
14727 !DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
14728 SDValue FILDChain = XTLI->BuildFILD(SDValue(N, 0), Ld->getValueType(0),
14729 Ld->getChain(), Op0, DAG);
14730 DAG.ReplaceAllUsesOfValueWith(Op0.getValue(1), FILDChain.getValue(1));
14737 // Optimize RES, EFLAGS = X86ISD::ADC LHS, RHS, EFLAGS
14738 static SDValue PerformADCCombine(SDNode *N, SelectionDAG &DAG,
14739 X86TargetLowering::DAGCombinerInfo &DCI) {
14740 // If the LHS and RHS of the ADC node are zero, then it can't overflow and
14741 // the result is either zero or one (depending on the input carry bit).
14742 // Strength reduce this down to a "set on carry" aka SETCC_CARRY&1.
14743 if (X86::isZeroNode(N->getOperand(0)) &&
14744 X86::isZeroNode(N->getOperand(1)) &&
14745 // We don't have a good way to replace an EFLAGS use, so only do this when
14747 SDValue(N, 1).use_empty()) {
14748 DebugLoc DL = N->getDebugLoc();
14749 EVT VT = N->getValueType(0);
14750 SDValue CarryOut = DAG.getConstant(0, N->getValueType(1));
14751 SDValue Res1 = DAG.getNode(ISD::AND, DL, VT,
14752 DAG.getNode(X86ISD::SETCC_CARRY, DL, VT,
14753 DAG.getConstant(X86::COND_B,MVT::i8),
14755 DAG.getConstant(1, VT));
14756 return DCI.CombineTo(N, Res1, CarryOut);
14762 // fold (add Y, (sete X, 0)) -> adc 0, Y
14763 // (add Y, (setne X, 0)) -> sbb -1, Y
14764 // (sub (sete X, 0), Y) -> sbb 0, Y
14765 // (sub (setne X, 0), Y) -> adc -1, Y
14766 static SDValue OptimizeConditionalInDecrement(SDNode *N, SelectionDAG &DAG) {
14767 DebugLoc DL = N->getDebugLoc();
14769 // Look through ZExts.
14770 SDValue Ext = N->getOperand(N->getOpcode() == ISD::SUB ? 1 : 0);
14771 if (Ext.getOpcode() != ISD::ZERO_EXTEND || !Ext.hasOneUse())
14774 SDValue SetCC = Ext.getOperand(0);
14775 if (SetCC.getOpcode() != X86ISD::SETCC || !SetCC.hasOneUse())
14778 X86::CondCode CC = (X86::CondCode)SetCC.getConstantOperandVal(0);
14779 if (CC != X86::COND_E && CC != X86::COND_NE)
14782 SDValue Cmp = SetCC.getOperand(1);
14783 if (Cmp.getOpcode() != X86ISD::CMP || !Cmp.hasOneUse() ||
14784 !X86::isZeroNode(Cmp.getOperand(1)) ||
14785 !Cmp.getOperand(0).getValueType().isInteger())
14788 SDValue CmpOp0 = Cmp.getOperand(0);
14789 SDValue NewCmp = DAG.getNode(X86ISD::CMP, DL, MVT::i32, CmpOp0,
14790 DAG.getConstant(1, CmpOp0.getValueType()));
14792 SDValue OtherVal = N->getOperand(N->getOpcode() == ISD::SUB ? 0 : 1);
14793 if (CC == X86::COND_NE)
14794 return DAG.getNode(N->getOpcode() == ISD::SUB ? X86ISD::ADC : X86ISD::SBB,
14795 DL, OtherVal.getValueType(), OtherVal,
14796 DAG.getConstant(-1ULL, OtherVal.getValueType()), NewCmp);
14797 return DAG.getNode(N->getOpcode() == ISD::SUB ? X86ISD::SBB : X86ISD::ADC,
14798 DL, OtherVal.getValueType(), OtherVal,
14799 DAG.getConstant(0, OtherVal.getValueType()), NewCmp);
14802 /// PerformADDCombine - Do target-specific dag combines on integer adds.
14803 static SDValue PerformAddCombine(SDNode *N, SelectionDAG &DAG,
14804 const X86Subtarget *Subtarget) {
14805 EVT VT = N->getValueType(0);
14806 SDValue Op0 = N->getOperand(0);
14807 SDValue Op1 = N->getOperand(1);
14809 // Try to synthesize horizontal adds from adds of shuffles.
14810 if (((Subtarget->hasSSSE3() && (VT == MVT::v8i16 || VT == MVT::v4i32)) ||
14811 (Subtarget->hasAVX2() && (VT == MVT::v16i16 || VT == MVT::v8i32))) &&
14812 isHorizontalBinOp(Op0, Op1, true))
14813 return DAG.getNode(X86ISD::HADD, N->getDebugLoc(), VT, Op0, Op1);
14815 return OptimizeConditionalInDecrement(N, DAG);
14818 static SDValue PerformSubCombine(SDNode *N, SelectionDAG &DAG,
14819 const X86Subtarget *Subtarget) {
14820 SDValue Op0 = N->getOperand(0);
14821 SDValue Op1 = N->getOperand(1);
14823 // X86 can't encode an immediate LHS of a sub. See if we can push the
14824 // negation into a preceding instruction.
14825 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op0)) {
14826 // If the RHS of the sub is a XOR with one use and a constant, invert the
14827 // immediate. Then add one to the LHS of the sub so we can turn
14828 // X-Y -> X+~Y+1, saving one register.
14829 if (Op1->hasOneUse() && Op1.getOpcode() == ISD::XOR &&
14830 isa<ConstantSDNode>(Op1.getOperand(1))) {
14831 APInt XorC = cast<ConstantSDNode>(Op1.getOperand(1))->getAPIntValue();
14832 EVT VT = Op0.getValueType();
14833 SDValue NewXor = DAG.getNode(ISD::XOR, Op1.getDebugLoc(), VT,
14835 DAG.getConstant(~XorC, VT));
14836 return DAG.getNode(ISD::ADD, N->getDebugLoc(), VT, NewXor,
14837 DAG.getConstant(C->getAPIntValue()+1, VT));
14841 // Try to synthesize horizontal adds from adds of shuffles.
14842 EVT VT = N->getValueType(0);
14843 if (((Subtarget->hasSSSE3() && (VT == MVT::v8i16 || VT == MVT::v4i32)) ||
14844 (Subtarget->hasAVX2() && (VT == MVT::v16i16 || VT == MVT::v8i32))) &&
14845 isHorizontalBinOp(Op0, Op1, true))
14846 return DAG.getNode(X86ISD::HSUB, N->getDebugLoc(), VT, Op0, Op1);
14848 return OptimizeConditionalInDecrement(N, DAG);
14851 SDValue X86TargetLowering::PerformDAGCombine(SDNode *N,
14852 DAGCombinerInfo &DCI) const {
14853 SelectionDAG &DAG = DCI.DAG;
14854 switch (N->getOpcode()) {
14856 case ISD::EXTRACT_VECTOR_ELT:
14857 return PerformEXTRACT_VECTOR_ELTCombine(N, DAG, *this);
14859 case ISD::SELECT: return PerformSELECTCombine(N, DAG, DCI, Subtarget);
14860 case X86ISD::CMOV: return PerformCMOVCombine(N, DAG, DCI);
14861 case ISD::ADD: return PerformAddCombine(N, DAG, Subtarget);
14862 case ISD::SUB: return PerformSubCombine(N, DAG, Subtarget);
14863 case X86ISD::ADC: return PerformADCCombine(N, DAG, DCI);
14864 case ISD::MUL: return PerformMulCombine(N, DAG, DCI);
14867 case ISD::SRL: return PerformShiftCombine(N, DAG, DCI, Subtarget);
14868 case ISD::AND: return PerformAndCombine(N, DAG, DCI, Subtarget);
14869 case ISD::OR: return PerformOrCombine(N, DAG, DCI, Subtarget);
14870 case ISD::XOR: return PerformXorCombine(N, DAG, DCI, Subtarget);
14871 case ISD::LOAD: return PerformLOADCombine(N, DAG, Subtarget);
14872 case ISD::STORE: return PerformSTORECombine(N, DAG, Subtarget);
14873 case ISD::SINT_TO_FP: return PerformSINT_TO_FPCombine(N, DAG, this);
14874 case ISD::FADD: return PerformFADDCombine(N, DAG, Subtarget);
14875 case ISD::FSUB: return PerformFSUBCombine(N, DAG, Subtarget);
14877 case X86ISD::FOR: return PerformFORCombine(N, DAG);
14878 case X86ISD::FAND: return PerformFANDCombine(N, DAG);
14879 case X86ISD::BT: return PerformBTCombine(N, DAG, DCI);
14880 case X86ISD::VZEXT_MOVL: return PerformVZEXT_MOVLCombine(N, DAG);
14881 case ISD::ZERO_EXTEND: return PerformZExtCombine(N, DAG, Subtarget);
14882 case ISD::SIGN_EXTEND: return PerformSExtCombine(N, DAG, DCI, Subtarget);
14883 case ISD::TRUNCATE: return PerformTruncateCombine(N, DAG, DCI);
14884 case X86ISD::SETCC: return PerformSETCCCombine(N, DAG);
14885 case X86ISD::SHUFP: // Handle all target specific shuffles
14886 case X86ISD::PALIGN:
14887 case X86ISD::UNPCKH:
14888 case X86ISD::UNPCKL:
14889 case X86ISD::MOVHLPS:
14890 case X86ISD::MOVLHPS:
14891 case X86ISD::PSHUFD:
14892 case X86ISD::PSHUFHW:
14893 case X86ISD::PSHUFLW:
14894 case X86ISD::MOVSS:
14895 case X86ISD::MOVSD:
14896 case X86ISD::VPERMILP:
14897 case X86ISD::VPERM2X128:
14898 case ISD::VECTOR_SHUFFLE: return PerformShuffleCombine(N, DAG, DCI,Subtarget);
14904 /// isTypeDesirableForOp - Return true if the target has native support for
14905 /// the specified value type and it is 'desirable' to use the type for the
14906 /// given node type. e.g. On x86 i16 is legal, but undesirable since i16
14907 /// instruction encodings are longer and some i16 instructions are slow.
14908 bool X86TargetLowering::isTypeDesirableForOp(unsigned Opc, EVT VT) const {
14909 if (!isTypeLegal(VT))
14911 if (VT != MVT::i16)
14918 case ISD::SIGN_EXTEND:
14919 case ISD::ZERO_EXTEND:
14920 case ISD::ANY_EXTEND:
14933 /// IsDesirableToPromoteOp - This method query the target whether it is
14934 /// beneficial for dag combiner to promote the specified node. If true, it
14935 /// should return the desired promotion type by reference.
14936 bool X86TargetLowering::IsDesirableToPromoteOp(SDValue Op, EVT &PVT) const {
14937 EVT VT = Op.getValueType();
14938 if (VT != MVT::i16)
14941 bool Promote = false;
14942 bool Commute = false;
14943 switch (Op.getOpcode()) {
14946 LoadSDNode *LD = cast<LoadSDNode>(Op);
14947 // If the non-extending load has a single use and it's not live out, then it
14948 // might be folded.
14949 if (LD->getExtensionType() == ISD::NON_EXTLOAD /*&&
14950 Op.hasOneUse()*/) {
14951 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
14952 UE = Op.getNode()->use_end(); UI != UE; ++UI) {
14953 // The only case where we'd want to promote LOAD (rather then it being
14954 // promoted as an operand is when it's only use is liveout.
14955 if (UI->getOpcode() != ISD::CopyToReg)
14962 case ISD::SIGN_EXTEND:
14963 case ISD::ZERO_EXTEND:
14964 case ISD::ANY_EXTEND:
14969 SDValue N0 = Op.getOperand(0);
14970 // Look out for (store (shl (load), x)).
14971 if (MayFoldLoad(N0) && MayFoldIntoStore(Op))
14984 SDValue N0 = Op.getOperand(0);
14985 SDValue N1 = Op.getOperand(1);
14986 if (!Commute && MayFoldLoad(N1))
14988 // Avoid disabling potential load folding opportunities.
14989 if (MayFoldLoad(N0) && (!isa<ConstantSDNode>(N1) || MayFoldIntoStore(Op)))
14991 if (MayFoldLoad(N1) && (!isa<ConstantSDNode>(N0) || MayFoldIntoStore(Op)))
15001 //===----------------------------------------------------------------------===//
15002 // X86 Inline Assembly Support
15003 //===----------------------------------------------------------------------===//
15006 // Helper to match a string separated by whitespace.
15007 bool matchAsmImpl(StringRef s, ArrayRef<const StringRef *> args) {
15008 s = s.substr(s.find_first_not_of(" \t")); // Skip leading whitespace.
15010 for (unsigned i = 0, e = args.size(); i != e; ++i) {
15011 StringRef piece(*args[i]);
15012 if (!s.startswith(piece)) // Check if the piece matches.
15015 s = s.substr(piece.size());
15016 StringRef::size_type pos = s.find_first_not_of(" \t");
15017 if (pos == 0) // We matched a prefix.
15025 const VariadicFunction1<bool, StringRef, StringRef, matchAsmImpl> matchAsm={};
15028 bool X86TargetLowering::ExpandInlineAsm(CallInst *CI) const {
15029 InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
15031 std::string AsmStr = IA->getAsmString();
15033 IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
15034 if (!Ty || Ty->getBitWidth() % 16 != 0)
15037 // TODO: should remove alternatives from the asmstring: "foo {a|b}" -> "foo a"
15038 SmallVector<StringRef, 4> AsmPieces;
15039 SplitString(AsmStr, AsmPieces, ";\n");
15041 switch (AsmPieces.size()) {
15042 default: return false;
15044 // FIXME: this should verify that we are targeting a 486 or better. If not,
15045 // we will turn this bswap into something that will be lowered to logical
15046 // ops instead of emitting the bswap asm. For now, we don't support 486 or
15047 // lower so don't worry about this.
15049 if (matchAsm(AsmPieces[0], "bswap", "$0") ||
15050 matchAsm(AsmPieces[0], "bswapl", "$0") ||
15051 matchAsm(AsmPieces[0], "bswapq", "$0") ||
15052 matchAsm(AsmPieces[0], "bswap", "${0:q}") ||
15053 matchAsm(AsmPieces[0], "bswapl", "${0:q}") ||
15054 matchAsm(AsmPieces[0], "bswapq", "${0:q}")) {
15055 // No need to check constraints, nothing other than the equivalent of
15056 // "=r,0" would be valid here.
15057 return IntrinsicLowering::LowerToByteSwap(CI);
15060 // rorw $$8, ${0:w} --> llvm.bswap.i16
15061 if (CI->getType()->isIntegerTy(16) &&
15062 IA->getConstraintString().compare(0, 5, "=r,0,") == 0 &&
15063 (matchAsm(AsmPieces[0], "rorw", "$$8,", "${0:w}") ||
15064 matchAsm(AsmPieces[0], "rolw", "$$8,", "${0:w}"))) {
15066 const std::string &ConstraintsStr = IA->getConstraintString();
15067 SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ",");
15068 std::sort(AsmPieces.begin(), AsmPieces.end());
15069 if (AsmPieces.size() == 4 &&
15070 AsmPieces[0] == "~{cc}" &&
15071 AsmPieces[1] == "~{dirflag}" &&
15072 AsmPieces[2] == "~{flags}" &&
15073 AsmPieces[3] == "~{fpsr}")
15074 return IntrinsicLowering::LowerToByteSwap(CI);
15078 if (CI->getType()->isIntegerTy(32) &&
15079 IA->getConstraintString().compare(0, 5, "=r,0,") == 0 &&
15080 matchAsm(AsmPieces[0], "rorw", "$$8,", "${0:w}") &&
15081 matchAsm(AsmPieces[1], "rorl", "$$16,", "$0") &&
15082 matchAsm(AsmPieces[2], "rorw", "$$8,", "${0:w}")) {
15084 const std::string &ConstraintsStr = IA->getConstraintString();
15085 SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ",");
15086 std::sort(AsmPieces.begin(), AsmPieces.end());
15087 if (AsmPieces.size() == 4 &&
15088 AsmPieces[0] == "~{cc}" &&
15089 AsmPieces[1] == "~{dirflag}" &&
15090 AsmPieces[2] == "~{flags}" &&
15091 AsmPieces[3] == "~{fpsr}")
15092 return IntrinsicLowering::LowerToByteSwap(CI);
15095 if (CI->getType()->isIntegerTy(64)) {
15096 InlineAsm::ConstraintInfoVector Constraints = IA->ParseConstraints();
15097 if (Constraints.size() >= 2 &&
15098 Constraints[0].Codes.size() == 1 && Constraints[0].Codes[0] == "A" &&
15099 Constraints[1].Codes.size() == 1 && Constraints[1].Codes[0] == "0") {
15100 // bswap %eax / bswap %edx / xchgl %eax, %edx -> llvm.bswap.i64
15101 if (matchAsm(AsmPieces[0], "bswap", "%eax") &&
15102 matchAsm(AsmPieces[1], "bswap", "%edx") &&
15103 matchAsm(AsmPieces[2], "xchgl", "%eax,", "%edx"))
15104 return IntrinsicLowering::LowerToByteSwap(CI);
15114 /// getConstraintType - Given a constraint letter, return the type of
15115 /// constraint it is for this target.
15116 X86TargetLowering::ConstraintType
15117 X86TargetLowering::getConstraintType(const std::string &Constraint) const {
15118 if (Constraint.size() == 1) {
15119 switch (Constraint[0]) {
15130 return C_RegisterClass;
15154 return TargetLowering::getConstraintType(Constraint);
15157 /// Examine constraint type and operand type and determine a weight value.
15158 /// This object must already have been set up with the operand type
15159 /// and the current alternative constraint selected.
15160 TargetLowering::ConstraintWeight
15161 X86TargetLowering::getSingleConstraintMatchWeight(
15162 AsmOperandInfo &info, const char *constraint) const {
15163 ConstraintWeight weight = CW_Invalid;
15164 Value *CallOperandVal = info.CallOperandVal;
15165 // If we don't have a value, we can't do a match,
15166 // but allow it at the lowest weight.
15167 if (CallOperandVal == NULL)
15169 Type *type = CallOperandVal->getType();
15170 // Look at the constraint type.
15171 switch (*constraint) {
15173 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
15184 if (CallOperandVal->getType()->isIntegerTy())
15185 weight = CW_SpecificReg;
15190 if (type->isFloatingPointTy())
15191 weight = CW_SpecificReg;
15194 if (type->isX86_MMXTy() && Subtarget->hasMMX())
15195 weight = CW_SpecificReg;
15199 if (((type->getPrimitiveSizeInBits() == 128) && Subtarget->hasSSE1()) ||
15200 ((type->getPrimitiveSizeInBits() == 256) && Subtarget->hasAVX()))
15201 weight = CW_Register;
15204 if (ConstantInt *C = dyn_cast<ConstantInt>(info.CallOperandVal)) {
15205 if (C->getZExtValue() <= 31)
15206 weight = CW_Constant;
15210 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15211 if (C->getZExtValue() <= 63)
15212 weight = CW_Constant;
15216 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15217 if ((C->getSExtValue() >= -0x80) && (C->getSExtValue() <= 0x7f))
15218 weight = CW_Constant;
15222 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15223 if ((C->getZExtValue() == 0xff) || (C->getZExtValue() == 0xffff))
15224 weight = CW_Constant;
15228 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15229 if (C->getZExtValue() <= 3)
15230 weight = CW_Constant;
15234 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15235 if (C->getZExtValue() <= 0xff)
15236 weight = CW_Constant;
15241 if (dyn_cast<ConstantFP>(CallOperandVal)) {
15242 weight = CW_Constant;
15246 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15247 if ((C->getSExtValue() >= -0x80000000LL) &&
15248 (C->getSExtValue() <= 0x7fffffffLL))
15249 weight = CW_Constant;
15253 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15254 if (C->getZExtValue() <= 0xffffffff)
15255 weight = CW_Constant;
15262 /// LowerXConstraint - try to replace an X constraint, which matches anything,
15263 /// with another that has more specific requirements based on the type of the
15264 /// corresponding operand.
15265 const char *X86TargetLowering::
15266 LowerXConstraint(EVT ConstraintVT) const {
15267 // FP X constraints get lowered to SSE1/2 registers if available, otherwise
15268 // 'f' like normal targets.
15269 if (ConstraintVT.isFloatingPoint()) {
15270 if (Subtarget->hasSSE2())
15272 if (Subtarget->hasSSE1())
15276 return TargetLowering::LowerXConstraint(ConstraintVT);
15279 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
15280 /// vector. If it is invalid, don't add anything to Ops.
15281 void X86TargetLowering::LowerAsmOperandForConstraint(SDValue Op,
15282 std::string &Constraint,
15283 std::vector<SDValue>&Ops,
15284 SelectionDAG &DAG) const {
15285 SDValue Result(0, 0);
15287 // Only support length 1 constraints for now.
15288 if (Constraint.length() > 1) return;
15290 char ConstraintLetter = Constraint[0];
15291 switch (ConstraintLetter) {
15294 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
15295 if (C->getZExtValue() <= 31) {
15296 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
15302 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
15303 if (C->getZExtValue() <= 63) {
15304 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
15310 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
15311 if ((int8_t)C->getSExtValue() == C->getSExtValue()) {
15312 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
15318 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
15319 if (C->getZExtValue() <= 255) {
15320 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
15326 // 32-bit signed value
15327 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
15328 if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()),
15329 C->getSExtValue())) {
15330 // Widen to 64 bits here to get it sign extended.
15331 Result = DAG.getTargetConstant(C->getSExtValue(), MVT::i64);
15334 // FIXME gcc accepts some relocatable values here too, but only in certain
15335 // memory models; it's complicated.
15340 // 32-bit unsigned value
15341 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
15342 if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()),
15343 C->getZExtValue())) {
15344 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
15348 // FIXME gcc accepts some relocatable values here too, but only in certain
15349 // memory models; it's complicated.
15353 // Literal immediates are always ok.
15354 if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(Op)) {
15355 // Widen to 64 bits here to get it sign extended.
15356 Result = DAG.getTargetConstant(CST->getSExtValue(), MVT::i64);
15360 // In any sort of PIC mode addresses need to be computed at runtime by
15361 // adding in a register or some sort of table lookup. These can't
15362 // be used as immediates.
15363 if (Subtarget->isPICStyleGOT() || Subtarget->isPICStyleStubPIC())
15366 // If we are in non-pic codegen mode, we allow the address of a global (with
15367 // an optional displacement) to be used with 'i'.
15368 GlobalAddressSDNode *GA = 0;
15369 int64_t Offset = 0;
15371 // Match either (GA), (GA+C), (GA+C1+C2), etc.
15373 if ((GA = dyn_cast<GlobalAddressSDNode>(Op))) {
15374 Offset += GA->getOffset();
15376 } else if (Op.getOpcode() == ISD::ADD) {
15377 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
15378 Offset += C->getZExtValue();
15379 Op = Op.getOperand(0);
15382 } else if (Op.getOpcode() == ISD::SUB) {
15383 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
15384 Offset += -C->getZExtValue();
15385 Op = Op.getOperand(0);
15390 // Otherwise, this isn't something we can handle, reject it.
15394 const GlobalValue *GV = GA->getGlobal();
15395 // If we require an extra load to get this address, as in PIC mode, we
15396 // can't accept it.
15397 if (isGlobalStubReference(Subtarget->ClassifyGlobalReference(GV,
15398 getTargetMachine())))
15401 Result = DAG.getTargetGlobalAddress(GV, Op.getDebugLoc(),
15402 GA->getValueType(0), Offset);
15407 if (Result.getNode()) {
15408 Ops.push_back(Result);
15411 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
15414 std::pair<unsigned, const TargetRegisterClass*>
15415 X86TargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
15417 // First, see if this is a constraint that directly corresponds to an LLVM
15419 if (Constraint.size() == 1) {
15420 // GCC Constraint Letters
15421 switch (Constraint[0]) {
15423 // TODO: Slight differences here in allocation order and leaving
15424 // RIP in the class. Do they matter any more here than they do
15425 // in the normal allocation?
15426 case 'q': // GENERAL_REGS in 64-bit mode, Q_REGS in 32-bit mode.
15427 if (Subtarget->is64Bit()) {
15428 if (VT == MVT::i32 || VT == MVT::f32)
15429 return std::make_pair(0U, X86::GR32RegisterClass);
15430 else if (VT == MVT::i16)
15431 return std::make_pair(0U, X86::GR16RegisterClass);
15432 else if (VT == MVT::i8 || VT == MVT::i1)
15433 return std::make_pair(0U, X86::GR8RegisterClass);
15434 else if (VT == MVT::i64 || VT == MVT::f64)
15435 return std::make_pair(0U, X86::GR64RegisterClass);
15438 // 32-bit fallthrough
15439 case 'Q': // Q_REGS
15440 if (VT == MVT::i32 || VT == MVT::f32)
15441 return std::make_pair(0U, X86::GR32_ABCDRegisterClass);
15442 else if (VT == MVT::i16)
15443 return std::make_pair(0U, X86::GR16_ABCDRegisterClass);
15444 else if (VT == MVT::i8 || VT == MVT::i1)
15445 return std::make_pair(0U, X86::GR8_ABCD_LRegisterClass);
15446 else if (VT == MVT::i64)
15447 return std::make_pair(0U, X86::GR64_ABCDRegisterClass);
15449 case 'r': // GENERAL_REGS
15450 case 'l': // INDEX_REGS
15451 if (VT == MVT::i8 || VT == MVT::i1)
15452 return std::make_pair(0U, X86::GR8RegisterClass);
15453 if (VT == MVT::i16)
15454 return std::make_pair(0U, X86::GR16RegisterClass);
15455 if (VT == MVT::i32 || VT == MVT::f32 || !Subtarget->is64Bit())
15456 return std::make_pair(0U, X86::GR32RegisterClass);
15457 return std::make_pair(0U, X86::GR64RegisterClass);
15458 case 'R': // LEGACY_REGS
15459 if (VT == MVT::i8 || VT == MVT::i1)
15460 return std::make_pair(0U, X86::GR8_NOREXRegisterClass);
15461 if (VT == MVT::i16)
15462 return std::make_pair(0U, X86::GR16_NOREXRegisterClass);
15463 if (VT == MVT::i32 || !Subtarget->is64Bit())
15464 return std::make_pair(0U, X86::GR32_NOREXRegisterClass);
15465 return std::make_pair(0U, X86::GR64_NOREXRegisterClass);
15466 case 'f': // FP Stack registers.
15467 // If SSE is enabled for this VT, use f80 to ensure the isel moves the
15468 // value to the correct fpstack register class.
15469 if (VT == MVT::f32 && !isScalarFPTypeInSSEReg(VT))
15470 return std::make_pair(0U, X86::RFP32RegisterClass);
15471 if (VT == MVT::f64 && !isScalarFPTypeInSSEReg(VT))
15472 return std::make_pair(0U, X86::RFP64RegisterClass);
15473 return std::make_pair(0U, X86::RFP80RegisterClass);
15474 case 'y': // MMX_REGS if MMX allowed.
15475 if (!Subtarget->hasMMX()) break;
15476 return std::make_pair(0U, X86::VR64RegisterClass);
15477 case 'Y': // SSE_REGS if SSE2 allowed
15478 if (!Subtarget->hasSSE2()) break;
15480 case 'x': // SSE_REGS if SSE1 allowed or AVX_REGS if AVX allowed
15481 if (!Subtarget->hasSSE1()) break;
15483 switch (VT.getSimpleVT().SimpleTy) {
15485 // Scalar SSE types.
15488 return std::make_pair(0U, X86::FR32RegisterClass);
15491 return std::make_pair(0U, X86::FR64RegisterClass);
15499 return std::make_pair(0U, X86::VR128RegisterClass);
15507 return std::make_pair(0U, X86::VR256RegisterClass);
15514 // Use the default implementation in TargetLowering to convert the register
15515 // constraint into a member of a register class.
15516 std::pair<unsigned, const TargetRegisterClass*> Res;
15517 Res = TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
15519 // Not found as a standard register?
15520 if (Res.second == 0) {
15521 // Map st(0) -> st(7) -> ST0
15522 if (Constraint.size() == 7 && Constraint[0] == '{' &&
15523 tolower(Constraint[1]) == 's' &&
15524 tolower(Constraint[2]) == 't' &&
15525 Constraint[3] == '(' &&
15526 (Constraint[4] >= '0' && Constraint[4] <= '7') &&
15527 Constraint[5] == ')' &&
15528 Constraint[6] == '}') {
15530 Res.first = X86::ST0+Constraint[4]-'0';
15531 Res.second = X86::RFP80RegisterClass;
15535 // GCC allows "st(0)" to be called just plain "st".
15536 if (StringRef("{st}").equals_lower(Constraint)) {
15537 Res.first = X86::ST0;
15538 Res.second = X86::RFP80RegisterClass;
15543 if (StringRef("{flags}").equals_lower(Constraint)) {
15544 Res.first = X86::EFLAGS;
15545 Res.second = X86::CCRRegisterClass;
15549 // 'A' means EAX + EDX.
15550 if (Constraint == "A") {
15551 Res.first = X86::EAX;
15552 Res.second = X86::GR32_ADRegisterClass;
15558 // Otherwise, check to see if this is a register class of the wrong value
15559 // type. For example, we want to map "{ax},i32" -> {eax}, we don't want it to
15560 // turn into {ax},{dx}.
15561 if (Res.second->hasType(VT))
15562 return Res; // Correct type already, nothing to do.
15564 // All of the single-register GCC register classes map their values onto
15565 // 16-bit register pieces "ax","dx","cx","bx","si","di","bp","sp". If we
15566 // really want an 8-bit or 32-bit register, map to the appropriate register
15567 // class and return the appropriate register.
15568 if (Res.second == X86::GR16RegisterClass) {
15569 if (VT == MVT::i8) {
15570 unsigned DestReg = 0;
15571 switch (Res.first) {
15573 case X86::AX: DestReg = X86::AL; break;
15574 case X86::DX: DestReg = X86::DL; break;
15575 case X86::CX: DestReg = X86::CL; break;
15576 case X86::BX: DestReg = X86::BL; break;
15579 Res.first = DestReg;
15580 Res.second = X86::GR8RegisterClass;
15582 } else if (VT == MVT::i32) {
15583 unsigned DestReg = 0;
15584 switch (Res.first) {
15586 case X86::AX: DestReg = X86::EAX; break;
15587 case X86::DX: DestReg = X86::EDX; break;
15588 case X86::CX: DestReg = X86::ECX; break;
15589 case X86::BX: DestReg = X86::EBX; break;
15590 case X86::SI: DestReg = X86::ESI; break;
15591 case X86::DI: DestReg = X86::EDI; break;
15592 case X86::BP: DestReg = X86::EBP; break;
15593 case X86::SP: DestReg = X86::ESP; break;
15596 Res.first = DestReg;
15597 Res.second = X86::GR32RegisterClass;
15599 } else if (VT == MVT::i64) {
15600 unsigned DestReg = 0;
15601 switch (Res.first) {
15603 case X86::AX: DestReg = X86::RAX; break;
15604 case X86::DX: DestReg = X86::RDX; break;
15605 case X86::CX: DestReg = X86::RCX; break;
15606 case X86::BX: DestReg = X86::RBX; break;
15607 case X86::SI: DestReg = X86::RSI; break;
15608 case X86::DI: DestReg = X86::RDI; break;
15609 case X86::BP: DestReg = X86::RBP; break;
15610 case X86::SP: DestReg = X86::RSP; break;
15613 Res.first = DestReg;
15614 Res.second = X86::GR64RegisterClass;
15617 } else if (Res.second == X86::FR32RegisterClass ||
15618 Res.second == X86::FR64RegisterClass ||
15619 Res.second == X86::VR128RegisterClass) {
15620 // Handle references to XMM physical registers that got mapped into the
15621 // wrong class. This can happen with constraints like {xmm0} where the
15622 // target independent register mapper will just pick the first match it can
15623 // find, ignoring the required type.
15624 if (VT == MVT::f32)
15625 Res.second = X86::FR32RegisterClass;
15626 else if (VT == MVT::f64)
15627 Res.second = X86::FR64RegisterClass;
15628 else if (X86::VR128RegisterClass->hasType(VT))
15629 Res.second = X86::VR128RegisterClass;