1 //===-- X86ISelLowering.h - X86 DAG Lowering Interface ----------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by Chris Lattner and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the interfaces that X86 uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
16 #include "X86InstrBuilder.h"
17 #include "X86ISelLowering.h"
18 #include "X86TargetMachine.h"
19 #include "llvm/CallingConv.h"
20 #include "llvm/Constants.h"
21 #include "llvm/Function.h"
22 #include "llvm/Intrinsics.h"
23 #include "llvm/ADT/VectorExtras.h"
24 #include "llvm/Analysis/ScalarEvolutionExpressions.h"
25 #include "llvm/CodeGen/MachineFrameInfo.h"
26 #include "llvm/CodeGen/MachineFunction.h"
27 #include "llvm/CodeGen/MachineInstrBuilder.h"
28 #include "llvm/CodeGen/SelectionDAG.h"
29 #include "llvm/CodeGen/SSARegMap.h"
30 #include "llvm/Support/MathExtras.h"
31 #include "llvm/Target/TargetOptions.h"
35 #include "llvm/Support/CommandLine.h"
36 static cl::opt<bool> EnableFastCC("enable-x86-fastcc", cl::Hidden,
37 cl::desc("Enable fastcc on X86"));
39 X86TargetLowering::X86TargetLowering(TargetMachine &TM)
40 : TargetLowering(TM) {
41 Subtarget = &TM.getSubtarget<X86Subtarget>();
42 X86ScalarSSE = Subtarget->hasSSE2();
44 // Set up the TargetLowering object.
46 // X86 is weird, it always uses i8 for shift amounts and setcc results.
47 setShiftAmountType(MVT::i8);
48 setSetCCResultType(MVT::i8);
49 setSetCCResultContents(ZeroOrOneSetCCResult);
50 setSchedulingPreference(SchedulingForRegPressure);
51 setShiftAmountFlavor(Mask); // shl X, 32 == shl X, 0
52 setStackPointerRegisterToSaveRestore(X86::ESP);
54 if (!Subtarget->isTargetDarwin())
55 // Darwin should use _setjmp/_longjmp instead of setjmp/longjmp.
56 setUseUnderscoreSetJmpLongJmp(true);
58 // Add legal addressing mode scale values.
59 addLegalAddressScale(8);
60 addLegalAddressScale(4);
61 addLegalAddressScale(2);
62 // Enter the ones which require both scale + index last. These are more
64 addLegalAddressScale(9);
65 addLegalAddressScale(5);
66 addLegalAddressScale(3);
68 // Set up the register classes.
69 addRegisterClass(MVT::i8, X86::R8RegisterClass);
70 addRegisterClass(MVT::i16, X86::R16RegisterClass);
71 addRegisterClass(MVT::i32, X86::R32RegisterClass);
73 // Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this
75 setOperationAction(ISD::UINT_TO_FP , MVT::i1 , Promote);
76 setOperationAction(ISD::UINT_TO_FP , MVT::i8 , Promote);
77 setOperationAction(ISD::UINT_TO_FP , MVT::i16 , Promote);
80 // No SSE i64 SINT_TO_FP, so expand i32 UINT_TO_FP instead.
81 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Expand);
83 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Promote);
85 // Promote i1/i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have
87 setOperationAction(ISD::SINT_TO_FP , MVT::i1 , Promote);
88 setOperationAction(ISD::SINT_TO_FP , MVT::i8 , Promote);
89 // SSE has no i16 to fp conversion, only i32
91 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
93 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Custom);
94 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
97 // We can handle SINT_TO_FP and FP_TO_SINT from/to i64 even though i64
99 setOperationAction(ISD::SINT_TO_FP , MVT::i64 , Custom);
100 setOperationAction(ISD::FP_TO_SINT , MVT::i64 , Custom);
102 // Promote i1/i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have
104 setOperationAction(ISD::FP_TO_SINT , MVT::i1 , Promote);
105 setOperationAction(ISD::FP_TO_SINT , MVT::i8 , Promote);
108 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Promote);
110 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Custom);
111 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
114 // Handle FP_TO_UINT by promoting the destination to a larger signed
116 setOperationAction(ISD::FP_TO_UINT , MVT::i1 , Promote);
117 setOperationAction(ISD::FP_TO_UINT , MVT::i8 , Promote);
118 setOperationAction(ISD::FP_TO_UINT , MVT::i16 , Promote);
120 if (X86ScalarSSE && !Subtarget->hasSSE3())
121 // Expand FP_TO_UINT into a select.
122 // FIXME: We would like to use a Custom expander here eventually to do
123 // the optimal thing for SSE vs. the default expansion in the legalizer.
124 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Expand);
126 // With SSE3 we can use fisttpll to convert to a signed i64.
127 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
129 setOperationAction(ISD::BIT_CONVERT , MVT::f32 , Expand);
130 setOperationAction(ISD::BIT_CONVERT , MVT::i32 , Expand);
132 setOperationAction(ISD::BRCOND , MVT::Other, Custom);
133 setOperationAction(ISD::BR_CC , MVT::Other, Expand);
134 setOperationAction(ISD::SELECT_CC , MVT::Other, Expand);
135 setOperationAction(ISD::MEMMOVE , MVT::Other, Expand);
136 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16 , Expand);
137 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Expand);
138 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
139 setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
140 setOperationAction(ISD::SEXTLOAD , MVT::i1 , Expand);
141 setOperationAction(ISD::FREM , MVT::f64 , Expand);
142 setOperationAction(ISD::CTPOP , MVT::i8 , Expand);
143 setOperationAction(ISD::CTTZ , MVT::i8 , Expand);
144 setOperationAction(ISD::CTLZ , MVT::i8 , Expand);
145 setOperationAction(ISD::CTPOP , MVT::i16 , Expand);
146 setOperationAction(ISD::CTTZ , MVT::i16 , Expand);
147 setOperationAction(ISD::CTLZ , MVT::i16 , Expand);
148 setOperationAction(ISD::CTPOP , MVT::i32 , Expand);
149 setOperationAction(ISD::CTTZ , MVT::i32 , Expand);
150 setOperationAction(ISD::CTLZ , MVT::i32 , Expand);
151 setOperationAction(ISD::READCYCLECOUNTER , MVT::i64 , Custom);
152 setOperationAction(ISD::BSWAP , MVT::i16 , Expand);
154 // These should be promoted to a larger select which is supported.
155 setOperationAction(ISD::SELECT , MVT::i1 , Promote);
156 setOperationAction(ISD::SELECT , MVT::i8 , Promote);
158 // X86 wants to expand cmov itself.
159 setOperationAction(ISD::SELECT , MVT::i16 , Custom);
160 setOperationAction(ISD::SELECT , MVT::i32 , Custom);
161 setOperationAction(ISD::SELECT , MVT::f32 , Custom);
162 setOperationAction(ISD::SELECT , MVT::f64 , Custom);
163 setOperationAction(ISD::SETCC , MVT::i8 , Custom);
164 setOperationAction(ISD::SETCC , MVT::i16 , Custom);
165 setOperationAction(ISD::SETCC , MVT::i32 , Custom);
166 setOperationAction(ISD::SETCC , MVT::f32 , Custom);
167 setOperationAction(ISD::SETCC , MVT::f64 , Custom);
168 // X86 ret instruction may pop stack.
169 setOperationAction(ISD::RET , MVT::Other, Custom);
171 setOperationAction(ISD::ConstantPool , MVT::i32 , Custom);
172 setOperationAction(ISD::GlobalAddress , MVT::i32 , Custom);
173 setOperationAction(ISD::ExternalSymbol , MVT::i32 , Custom);
174 // 64-bit addm sub, shl, sra, srl (iff 32-bit x86)
175 setOperationAction(ISD::SHL_PARTS , MVT::i32 , Custom);
176 setOperationAction(ISD::SRA_PARTS , MVT::i32 , Custom);
177 setOperationAction(ISD::SRL_PARTS , MVT::i32 , Custom);
178 // X86 wants to expand memset / memcpy itself.
179 setOperationAction(ISD::MEMSET , MVT::Other, Custom);
180 setOperationAction(ISD::MEMCPY , MVT::Other, Custom);
182 // We don't have line number support yet.
183 setOperationAction(ISD::LOCATION, MVT::Other, Expand);
184 setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
185 // FIXME - use subtarget debug flags
186 if (!Subtarget->isTargetDarwin())
187 setOperationAction(ISD::DEBUG_LABEL, MVT::Other, Expand);
189 // VASTART needs to be custom lowered to use the VarArgsFrameIndex
190 setOperationAction(ISD::VASTART , MVT::Other, Custom);
192 // Use the default implementation.
193 setOperationAction(ISD::VAARG , MVT::Other, Expand);
194 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
195 setOperationAction(ISD::VAEND , MVT::Other, Expand);
196 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
197 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
198 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32 , Expand);
200 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
201 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
204 // Set up the FP register classes.
205 addRegisterClass(MVT::f32, X86::FR32RegisterClass);
206 addRegisterClass(MVT::f64, X86::FR64RegisterClass);
208 // SSE has no load+extend ops
209 setOperationAction(ISD::EXTLOAD, MVT::f32, Expand);
210 setOperationAction(ISD::ZEXTLOAD, MVT::f32, Expand);
212 // Use ANDPD to simulate FABS.
213 setOperationAction(ISD::FABS , MVT::f64, Custom);
214 setOperationAction(ISD::FABS , MVT::f32, Custom);
216 // Use XORP to simulate FNEG.
217 setOperationAction(ISD::FNEG , MVT::f64, Custom);
218 setOperationAction(ISD::FNEG , MVT::f32, Custom);
220 // We don't support sin/cos/fmod
221 setOperationAction(ISD::FSIN , MVT::f64, Expand);
222 setOperationAction(ISD::FCOS , MVT::f64, Expand);
223 setOperationAction(ISD::FREM , MVT::f64, Expand);
224 setOperationAction(ISD::FSIN , MVT::f32, Expand);
225 setOperationAction(ISD::FCOS , MVT::f32, Expand);
226 setOperationAction(ISD::FREM , MVT::f32, Expand);
228 // Expand FP immediates into loads from the stack, except for the special
230 setOperationAction(ISD::ConstantFP, MVT::f64, Expand);
231 setOperationAction(ISD::ConstantFP, MVT::f32, Expand);
232 addLegalFPImmediate(+0.0); // xorps / xorpd
234 // Set up the FP register classes.
235 addRegisterClass(MVT::f64, X86::RFPRegisterClass);
237 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
240 setOperationAction(ISD::FSIN , MVT::f64 , Expand);
241 setOperationAction(ISD::FCOS , MVT::f64 , Expand);
244 setOperationAction(ISD::ConstantFP, MVT::f64, Expand);
245 addLegalFPImmediate(+0.0); // FLD0
246 addLegalFPImmediate(+1.0); // FLD1
247 addLegalFPImmediate(-0.0); // FLD0/FCHS
248 addLegalFPImmediate(-1.0); // FLD1/FCHS
251 // First set operation action for all vector types to expand. Then we
252 // will selectively turn on ones that can be effectively codegen'd.
253 for (unsigned VT = (unsigned)MVT::Vector + 1;
254 VT != (unsigned)MVT::LAST_VALUETYPE; VT++) {
255 setOperationAction(ISD::ADD , (MVT::ValueType)VT, Expand);
256 setOperationAction(ISD::SUB , (MVT::ValueType)VT, Expand);
257 setOperationAction(ISD::MUL , (MVT::ValueType)VT, Expand);
258 setOperationAction(ISD::LOAD, (MVT::ValueType)VT, Expand);
259 setOperationAction(ISD::VECTOR_SHUFFLE, (MVT::ValueType)VT, Expand);
260 setOperationAction(ISD::EXTRACT_VECTOR_ELT, (MVT::ValueType)VT, Expand);
261 setOperationAction(ISD::INSERT_VECTOR_ELT, (MVT::ValueType)VT, Expand);
264 if (Subtarget->hasMMX()) {
265 addRegisterClass(MVT::v8i8, X86::VR64RegisterClass);
266 addRegisterClass(MVT::v4i16, X86::VR64RegisterClass);
267 addRegisterClass(MVT::v2i32, X86::VR64RegisterClass);
269 // FIXME: add MMX packed arithmetics
270 setOperationAction(ISD::BUILD_VECTOR, MVT::v8i8, Expand);
271 setOperationAction(ISD::BUILD_VECTOR, MVT::v4i16, Expand);
272 setOperationAction(ISD::BUILD_VECTOR, MVT::v2i32, Expand);
275 if (Subtarget->hasSSE1()) {
276 addRegisterClass(MVT::v4f32, X86::VR128RegisterClass);
278 setOperationAction(ISD::AND, MVT::v4f32, Legal);
279 setOperationAction(ISD::OR, MVT::v4f32, Legal);
280 setOperationAction(ISD::XOR, MVT::v4f32, Legal);
281 setOperationAction(ISD::ADD, MVT::v4f32, Legal);
282 setOperationAction(ISD::SUB, MVT::v4f32, Legal);
283 setOperationAction(ISD::MUL, MVT::v4f32, Legal);
284 setOperationAction(ISD::LOAD, MVT::v4f32, Legal);
285 setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
286 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4f32, Custom);
287 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
288 setOperationAction(ISD::SELECT, MVT::v4f32, Custom);
291 if (Subtarget->hasSSE2()) {
292 addRegisterClass(MVT::v2f64, X86::VR128RegisterClass);
293 addRegisterClass(MVT::v16i8, X86::VR128RegisterClass);
294 addRegisterClass(MVT::v8i16, X86::VR128RegisterClass);
295 addRegisterClass(MVT::v4i32, X86::VR128RegisterClass);
296 addRegisterClass(MVT::v2i64, X86::VR128RegisterClass);
298 setOperationAction(ISD::ADD, MVT::v2f64, Legal);
299 setOperationAction(ISD::ADD, MVT::v16i8, Legal);
300 setOperationAction(ISD::ADD, MVT::v8i16, Legal);
301 setOperationAction(ISD::ADD, MVT::v4i32, Legal);
302 setOperationAction(ISD::SUB, MVT::v2f64, Legal);
303 setOperationAction(ISD::SUB, MVT::v16i8, Legal);
304 setOperationAction(ISD::SUB, MVT::v8i16, Legal);
305 setOperationAction(ISD::SUB, MVT::v4i32, Legal);
306 setOperationAction(ISD::MUL, MVT::v8i16, Legal);
307 setOperationAction(ISD::MUL, MVT::v2f64, Legal);
309 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16i8, Custom);
310 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i16, Custom);
311 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
312 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
313 // Implement v4f32 insert_vector_elt in terms of SSE2 v8i16 ones.
314 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
316 // Custom lower build_vector, vector_shuffle, and extract_vector_elt.
317 for (unsigned VT = (unsigned)MVT::v16i8; VT != (unsigned)MVT::v2i64; VT++) {
318 setOperationAction(ISD::BUILD_VECTOR, (MVT::ValueType)VT, Custom);
319 setOperationAction(ISD::VECTOR_SHUFFLE, (MVT::ValueType)VT, Custom);
320 setOperationAction(ISD::EXTRACT_VECTOR_ELT, (MVT::ValueType)VT, Custom);
322 setOperationAction(ISD::BUILD_VECTOR, MVT::v2f64, Custom);
323 setOperationAction(ISD::BUILD_VECTOR, MVT::v2i64, Custom);
324 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Custom);
325 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Custom);
326 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Custom);
327 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
329 // Promote v16i8, v8i16, v4i32 load, select, and, or, xor to v2i64.
330 for (unsigned VT = (unsigned)MVT::v16i8; VT != (unsigned)MVT::v2i64; VT++) {
331 setOperationAction(ISD::AND, (MVT::ValueType)VT, Promote);
332 AddPromotedToType (ISD::AND, (MVT::ValueType)VT, MVT::v2i64);
333 setOperationAction(ISD::OR, (MVT::ValueType)VT, Promote);
334 AddPromotedToType (ISD::OR, (MVT::ValueType)VT, MVT::v2i64);
335 setOperationAction(ISD::XOR, (MVT::ValueType)VT, Promote);
336 AddPromotedToType (ISD::XOR, (MVT::ValueType)VT, MVT::v2i64);
337 setOperationAction(ISD::LOAD, (MVT::ValueType)VT, Promote);
338 AddPromotedToType (ISD::LOAD, (MVT::ValueType)VT, MVT::v2i64);
339 setOperationAction(ISD::SELECT, (MVT::ValueType)VT, Promote);
340 AddPromotedToType (ISD::SELECT, (MVT::ValueType)VT, MVT::v2i64);
343 // Custom lower v2i64 and v2f64 selects.
344 setOperationAction(ISD::LOAD, MVT::v2f64, Legal);
345 setOperationAction(ISD::LOAD, MVT::v2i64, Legal);
346 setOperationAction(ISD::SELECT, MVT::v2f64, Custom);
347 setOperationAction(ISD::SELECT, MVT::v2i64, Custom);
350 // We want to custom lower some of our intrinsics.
351 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
353 computeRegisterProperties();
355 // FIXME: These should be based on subtarget info. Plus, the values should
356 // be smaller when we are in optimizing for size mode.
357 maxStoresPerMemset = 16; // For %llvm.memset -> sequence of stores
358 maxStoresPerMemcpy = 16; // For %llvm.memcpy -> sequence of stores
359 maxStoresPerMemmove = 16; // For %llvm.memmove -> sequence of stores
360 allowUnalignedMemoryAccesses = true; // x86 supports it!
363 std::vector<SDOperand>
364 X86TargetLowering::LowerArguments(Function &F, SelectionDAG &DAG) {
365 if (F.getCallingConv() == CallingConv::Fast && EnableFastCC)
366 return LowerFastCCArguments(F, DAG);
367 return LowerCCCArguments(F, DAG);
370 std::pair<SDOperand, SDOperand>
371 X86TargetLowering::LowerCallTo(SDOperand Chain, const Type *RetTy,
372 bool isVarArg, unsigned CallingConv,
374 SDOperand Callee, ArgListTy &Args,
376 assert((!isVarArg || CallingConv == CallingConv::C) &&
377 "Only C takes varargs!");
379 // If the callee is a GlobalAddress node (quite common, every direct call is)
380 // turn it into a TargetGlobalAddress node so that legalize doesn't hack it.
381 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
382 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), getPointerTy());
383 else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee))
384 Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy());
386 if (CallingConv == CallingConv::Fast && EnableFastCC)
387 return LowerFastCCCallTo(Chain, RetTy, isTailCall, Callee, Args, DAG);
388 return LowerCCCCallTo(Chain, RetTy, isVarArg, isTailCall, Callee, Args, DAG);
391 //===----------------------------------------------------------------------===//
392 // C Calling Convention implementation
393 //===----------------------------------------------------------------------===//
395 std::vector<SDOperand>
396 X86TargetLowering::LowerCCCArguments(Function &F, SelectionDAG &DAG) {
397 std::vector<SDOperand> ArgValues;
399 MachineFunction &MF = DAG.getMachineFunction();
400 MachineFrameInfo *MFI = MF.getFrameInfo();
402 // Add DAG nodes to load the arguments... On entry to a function on the X86,
403 // the stack frame looks like this:
405 // [ESP] -- return address
406 // [ESP + 4] -- first argument (leftmost lexically)
407 // [ESP + 8] -- second argument, if first argument is four bytes in size
410 unsigned ArgOffset = 0; // Frame mechanisms handle retaddr slot
411 for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I) {
412 MVT::ValueType ObjectVT = getValueType(I->getType());
413 unsigned ArgIncrement = 4;
416 default: assert(0 && "Unhandled argument type!");
418 case MVT::i8: ObjSize = 1; break;
419 case MVT::i16: ObjSize = 2; break;
420 case MVT::i32: ObjSize = 4; break;
421 case MVT::i64: ObjSize = ArgIncrement = 8; break;
422 case MVT::f32: ObjSize = 4; break;
423 case MVT::f64: ObjSize = ArgIncrement = 8; break;
425 // Create the frame index object for this incoming parameter...
426 int FI = MFI->CreateFixedObject(ObjSize, ArgOffset);
428 // Create the SelectionDAG nodes corresponding to a load from this parameter
429 SDOperand FIN = DAG.getFrameIndex(FI, MVT::i32);
431 // Don't codegen dead arguments. FIXME: remove this check when we can nuke
435 ArgValue = DAG.getLoad(ObjectVT, DAG.getEntryNode(), FIN,
436 DAG.getSrcValue(NULL));
438 if (MVT::isInteger(ObjectVT))
439 ArgValue = DAG.getConstant(0, ObjectVT);
441 ArgValue = DAG.getConstantFP(0, ObjectVT);
443 ArgValues.push_back(ArgValue);
445 ArgOffset += ArgIncrement; // Move on to the next argument...
448 // If the function takes variable number of arguments, make a frame index for
449 // the start of the first vararg value... for expansion of llvm.va_start.
451 VarArgsFrameIndex = MFI->CreateFixedObject(1, ArgOffset);
452 ReturnAddrIndex = 0; // No return address slot generated yet.
453 BytesToPopOnReturn = 0; // Callee pops nothing.
454 BytesCallerReserves = ArgOffset;
458 std::pair<SDOperand, SDOperand>
459 X86TargetLowering::LowerCCCCallTo(SDOperand Chain, const Type *RetTy,
460 bool isVarArg, bool isTailCall,
461 SDOperand Callee, ArgListTy &Args,
463 // Count how many bytes are to be pushed on the stack.
464 unsigned NumBytes = 0;
468 Chain = DAG.getCALLSEQ_START(Chain, DAG.getConstant(0, getPointerTy()));
470 for (unsigned i = 0, e = Args.size(); i != e; ++i)
471 switch (getValueType(Args[i].second)) {
472 default: assert(0 && "Unknown value type!");
486 Chain = DAG.getCALLSEQ_START(Chain,
487 DAG.getConstant(NumBytes, getPointerTy()));
489 // Arguments go on the stack in reverse order, as specified by the ABI.
490 unsigned ArgOffset = 0;
491 SDOperand StackPtr = DAG.getRegister(X86::ESP, MVT::i32);
492 std::vector<SDOperand> Stores;
494 for (unsigned i = 0, e = Args.size(); i != e; ++i) {
495 SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
496 PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
498 switch (getValueType(Args[i].second)) {
499 default: assert(0 && "Unexpected ValueType for argument!");
503 // Promote the integer to 32 bits. If the input type is signed use a
504 // sign extend, otherwise use a zero extend.
505 if (Args[i].second->isSigned())
506 Args[i].first =DAG.getNode(ISD::SIGN_EXTEND, MVT::i32, Args[i].first);
508 Args[i].first =DAG.getNode(ISD::ZERO_EXTEND, MVT::i32, Args[i].first);
513 Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
514 Args[i].first, PtrOff,
515 DAG.getSrcValue(NULL)));
520 Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
521 Args[i].first, PtrOff,
522 DAG.getSrcValue(NULL)));
527 Chain = DAG.getNode(ISD::TokenFactor, MVT::Other, Stores);
530 std::vector<MVT::ValueType> RetVals;
531 MVT::ValueType RetTyVT = getValueType(RetTy);
532 RetVals.push_back(MVT::Other);
534 // The result values produced have to be legal. Promote the result.
536 case MVT::isVoid: break;
538 RetVals.push_back(RetTyVT);
543 RetVals.push_back(MVT::i32);
547 RetVals.push_back(MVT::f32);
549 RetVals.push_back(MVT::f64);
552 RetVals.push_back(MVT::i32);
553 RetVals.push_back(MVT::i32);
557 std::vector<MVT::ValueType> NodeTys;
558 NodeTys.push_back(MVT::Other); // Returns a chain
559 NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
560 std::vector<SDOperand> Ops;
561 Ops.push_back(Chain);
562 Ops.push_back(Callee);
564 // FIXME: Do not generate X86ISD::TAILCALL for now.
565 Chain = DAG.getNode(X86ISD::CALL, NodeTys, Ops);
566 SDOperand InFlag = Chain.getValue(1);
569 NodeTys.push_back(MVT::Other); // Returns a chain
570 NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
572 Ops.push_back(Chain);
573 Ops.push_back(DAG.getConstant(NumBytes, getPointerTy()));
574 Ops.push_back(DAG.getConstant(0, getPointerTy()));
575 Ops.push_back(InFlag);
576 Chain = DAG.getNode(ISD::CALLSEQ_END, NodeTys, Ops);
577 InFlag = Chain.getValue(1);
580 if (RetTyVT != MVT::isVoid) {
582 default: assert(0 && "Unknown value type to return!");
585 RetVal = DAG.getCopyFromReg(Chain, X86::AL, MVT::i8, InFlag);
586 Chain = RetVal.getValue(1);
587 if (RetTyVT == MVT::i1)
588 RetVal = DAG.getNode(ISD::TRUNCATE, MVT::i1, RetVal);
591 RetVal = DAG.getCopyFromReg(Chain, X86::AX, MVT::i16, InFlag);
592 Chain = RetVal.getValue(1);
595 RetVal = DAG.getCopyFromReg(Chain, X86::EAX, MVT::i32, InFlag);
596 Chain = RetVal.getValue(1);
599 SDOperand Lo = DAG.getCopyFromReg(Chain, X86::EAX, MVT::i32, InFlag);
600 SDOperand Hi = DAG.getCopyFromReg(Lo.getValue(1), X86::EDX, MVT::i32,
602 RetVal = DAG.getNode(ISD::BUILD_PAIR, MVT::i64, Lo, Hi);
603 Chain = Hi.getValue(1);
608 std::vector<MVT::ValueType> Tys;
609 Tys.push_back(MVT::f64);
610 Tys.push_back(MVT::Other);
611 Tys.push_back(MVT::Flag);
612 std::vector<SDOperand> Ops;
613 Ops.push_back(Chain);
614 Ops.push_back(InFlag);
615 RetVal = DAG.getNode(X86ISD::FP_GET_RESULT, Tys, Ops);
616 Chain = RetVal.getValue(1);
617 InFlag = RetVal.getValue(2);
619 // FIXME: Currently the FST is flagged to the FP_GET_RESULT. This
620 // shouldn't be necessary except that RFP cannot be live across
621 // multiple blocks. When stackifier is fixed, they can be uncoupled.
622 MachineFunction &MF = DAG.getMachineFunction();
623 int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8);
624 SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
626 Tys.push_back(MVT::Other);
628 Ops.push_back(Chain);
629 Ops.push_back(RetVal);
630 Ops.push_back(StackSlot);
631 Ops.push_back(DAG.getValueType(RetTyVT));
632 Ops.push_back(InFlag);
633 Chain = DAG.getNode(X86ISD::FST, Tys, Ops);
634 RetVal = DAG.getLoad(RetTyVT, Chain, StackSlot,
635 DAG.getSrcValue(NULL));
636 Chain = RetVal.getValue(1);
639 if (RetTyVT == MVT::f32 && !X86ScalarSSE)
640 // FIXME: we would really like to remember that this FP_ROUND
641 // operation is okay to eliminate if we allow excess FP precision.
642 RetVal = DAG.getNode(ISD::FP_ROUND, MVT::f32, RetVal);
648 return std::make_pair(RetVal, Chain);
651 //===----------------------------------------------------------------------===//
652 // Fast Calling Convention implementation
653 //===----------------------------------------------------------------------===//
655 // The X86 'fast' calling convention passes up to two integer arguments in
656 // registers (an appropriate portion of EAX/EDX), passes arguments in C order,
657 // and requires that the callee pop its arguments off the stack (allowing proper
658 // tail calls), and has the same return value conventions as C calling convs.
660 // This calling convention always arranges for the callee pop value to be 8n+4
661 // bytes, which is needed for tail recursion elimination and stack alignment
664 // Note that this can be enhanced in the future to pass fp vals in registers
665 // (when we have a global fp allocator) and do other tricks.
668 /// AddLiveIn - This helper function adds the specified physical register to the
669 /// MachineFunction as a live in value. It also creates a corresponding virtual
671 static unsigned AddLiveIn(MachineFunction &MF, unsigned PReg,
672 TargetRegisterClass *RC) {
673 assert(RC->contains(PReg) && "Not the correct regclass!");
674 unsigned VReg = MF.getSSARegMap()->createVirtualRegister(RC);
675 MF.addLiveIn(PReg, VReg);
679 // FASTCC_NUM_INT_ARGS_INREGS - This is the max number of integer arguments
680 // to pass in registers. 0 is none, 1 is is "use EAX", 2 is "use EAX and
681 // EDX". Anything more is illegal.
683 // FIXME: The linscan register allocator currently has problem with
684 // coalescing. At the time of this writing, whenever it decides to coalesce
685 // a physreg with a virtreg, this increases the size of the physreg's live
686 // range, and the live range cannot ever be reduced. This causes problems if
687 // too many physregs are coaleced with virtregs, which can cause the register
688 // allocator to wedge itself.
690 // This code triggers this problem more often if we pass args in registers,
691 // so disable it until this is fixed.
693 // NOTE: this isn't marked const, so that GCC doesn't emit annoying warnings
694 // about code being dead.
696 static unsigned FASTCC_NUM_INT_ARGS_INREGS = 0;
699 std::vector<SDOperand>
700 X86TargetLowering::LowerFastCCArguments(Function &F, SelectionDAG &DAG) {
701 std::vector<SDOperand> ArgValues;
703 MachineFunction &MF = DAG.getMachineFunction();
704 MachineFrameInfo *MFI = MF.getFrameInfo();
706 // Add DAG nodes to load the arguments... On entry to a function the stack
707 // frame looks like this:
709 // [ESP] -- return address
710 // [ESP + 4] -- first nonreg argument (leftmost lexically)
711 // [ESP + 8] -- second nonreg argument, if first argument is 4 bytes in size
713 unsigned ArgOffset = 0; // Frame mechanisms handle retaddr slot
715 // Keep track of the number of integer regs passed so far. This can be either
716 // 0 (neither EAX or EDX used), 1 (EAX is used) or 2 (EAX and EDX are both
718 unsigned NumIntRegs = 0;
720 for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I) {
721 MVT::ValueType ObjectVT = getValueType(I->getType());
722 unsigned ArgIncrement = 4;
723 unsigned ObjSize = 0;
727 default: assert(0 && "Unhandled argument type!");
730 if (NumIntRegs < FASTCC_NUM_INT_ARGS_INREGS) {
731 if (!I->use_empty()) {
732 unsigned VReg = AddLiveIn(MF, NumIntRegs ? X86::DL : X86::AL,
733 X86::R8RegisterClass);
734 ArgValue = DAG.getCopyFromReg(DAG.getRoot(), VReg, MVT::i8);
735 DAG.setRoot(ArgValue.getValue(1));
736 if (ObjectVT == MVT::i1)
737 // FIXME: Should insert a assertzext here.
738 ArgValue = DAG.getNode(ISD::TRUNCATE, MVT::i1, ArgValue);
747 if (NumIntRegs < FASTCC_NUM_INT_ARGS_INREGS) {
748 if (!I->use_empty()) {
749 unsigned VReg = AddLiveIn(MF, NumIntRegs ? X86::DX : X86::AX,
750 X86::R16RegisterClass);
751 ArgValue = DAG.getCopyFromReg(DAG.getRoot(), VReg, MVT::i16);
752 DAG.setRoot(ArgValue.getValue(1));
760 if (NumIntRegs < FASTCC_NUM_INT_ARGS_INREGS) {
761 if (!I->use_empty()) {
762 unsigned VReg = AddLiveIn(MF, NumIntRegs ? X86::EDX : X86::EAX,
763 X86::R32RegisterClass);
764 ArgValue = DAG.getCopyFromReg(DAG.getRoot(), VReg, MVT::i32);
765 DAG.setRoot(ArgValue.getValue(1));
773 if (NumIntRegs+2 <= FASTCC_NUM_INT_ARGS_INREGS) {
774 if (!I->use_empty()) {
775 unsigned BotReg = AddLiveIn(MF, X86::EAX, X86::R32RegisterClass);
776 unsigned TopReg = AddLiveIn(MF, X86::EDX, X86::R32RegisterClass);
778 SDOperand Low = DAG.getCopyFromReg(DAG.getRoot(), BotReg, MVT::i32);
779 SDOperand Hi = DAG.getCopyFromReg(Low.getValue(1), TopReg, MVT::i32);
780 DAG.setRoot(Hi.getValue(1));
782 ArgValue = DAG.getNode(ISD::BUILD_PAIR, MVT::i64, Low, Hi);
786 } else if (NumIntRegs+1 <= FASTCC_NUM_INT_ARGS_INREGS) {
787 if (!I->use_empty()) {
788 unsigned BotReg = AddLiveIn(MF, X86::EDX, X86::R32RegisterClass);
789 SDOperand Low = DAG.getCopyFromReg(DAG.getRoot(), BotReg, MVT::i32);
790 DAG.setRoot(Low.getValue(1));
792 // Load the high part from memory.
793 // Create the frame index object for this incoming parameter...
794 int FI = MFI->CreateFixedObject(4, ArgOffset);
795 SDOperand FIN = DAG.getFrameIndex(FI, MVT::i32);
796 SDOperand Hi = DAG.getLoad(MVT::i32, DAG.getEntryNode(), FIN,
797 DAG.getSrcValue(NULL));
798 ArgValue = DAG.getNode(ISD::BUILD_PAIR, MVT::i64, Low, Hi);
801 NumIntRegs = FASTCC_NUM_INT_ARGS_INREGS;
804 ObjSize = ArgIncrement = 8;
806 case MVT::f32: ObjSize = 4; break;
807 case MVT::f64: ObjSize = ArgIncrement = 8; break;
810 // Don't codegen dead arguments. FIXME: remove this check when we can nuke
812 if (ObjSize && !I->use_empty()) {
813 // Create the frame index object for this incoming parameter...
814 int FI = MFI->CreateFixedObject(ObjSize, ArgOffset);
816 // Create the SelectionDAG nodes corresponding to a load from this
818 SDOperand FIN = DAG.getFrameIndex(FI, MVT::i32);
820 ArgValue = DAG.getLoad(ObjectVT, DAG.getEntryNode(), FIN,
821 DAG.getSrcValue(NULL));
822 } else if (ArgValue.Val == 0) {
823 if (MVT::isInteger(ObjectVT))
824 ArgValue = DAG.getConstant(0, ObjectVT);
826 ArgValue = DAG.getConstantFP(0, ObjectVT);
828 ArgValues.push_back(ArgValue);
831 ArgOffset += ArgIncrement; // Move on to the next argument.
834 // Make sure the instruction takes 8n+4 bytes to make sure the start of the
835 // arguments and the arguments after the retaddr has been pushed are aligned.
836 if ((ArgOffset & 7) == 0)
839 VarArgsFrameIndex = 0xAAAAAAA; // fastcc functions can't have varargs.
840 ReturnAddrIndex = 0; // No return address slot generated yet.
841 BytesToPopOnReturn = ArgOffset; // Callee pops all stack arguments.
842 BytesCallerReserves = 0;
844 // Finally, inform the code generator which regs we return values in.
845 switch (getValueType(F.getReturnType())) {
846 default: assert(0 && "Unknown type!");
847 case MVT::isVoid: break;
852 MF.addLiveOut(X86::EAX);
855 MF.addLiveOut(X86::EAX);
856 MF.addLiveOut(X86::EDX);
860 MF.addLiveOut(X86::ST0);
866 std::pair<SDOperand, SDOperand>
867 X86TargetLowering::LowerFastCCCallTo(SDOperand Chain, const Type *RetTy,
868 bool isTailCall, SDOperand Callee,
869 ArgListTy &Args, SelectionDAG &DAG) {
870 // Count how many bytes are to be pushed on the stack.
871 unsigned NumBytes = 0;
873 // Keep track of the number of integer regs passed so far. This can be either
874 // 0 (neither EAX or EDX used), 1 (EAX is used) or 2 (EAX and EDX are both
876 unsigned NumIntRegs = 0;
878 for (unsigned i = 0, e = Args.size(); i != e; ++i)
879 switch (getValueType(Args[i].second)) {
880 default: assert(0 && "Unknown value type!");
885 if (NumIntRegs < FASTCC_NUM_INT_ARGS_INREGS) {
894 if (NumIntRegs+2 <= FASTCC_NUM_INT_ARGS_INREGS) {
897 } else if (NumIntRegs+1 <= FASTCC_NUM_INT_ARGS_INREGS) {
898 NumIntRegs = FASTCC_NUM_INT_ARGS_INREGS;
909 // Make sure the instruction takes 8n+4 bytes to make sure the start of the
910 // arguments and the arguments after the retaddr has been pushed are aligned.
911 if ((NumBytes & 7) == 0)
914 Chain = DAG.getCALLSEQ_START(Chain,DAG.getConstant(NumBytes, getPointerTy()));
916 // Arguments go on the stack in reverse order, as specified by the ABI.
917 unsigned ArgOffset = 0;
918 SDOperand StackPtr = DAG.getRegister(X86::ESP, MVT::i32);
920 std::vector<SDOperand> Stores;
921 std::vector<SDOperand> RegValuesToPass;
922 for (unsigned i = 0, e = Args.size(); i != e; ++i) {
923 switch (getValueType(Args[i].second)) {
924 default: assert(0 && "Unexpected ValueType for argument!");
926 Args[i].first = DAG.getNode(ISD::ANY_EXTEND, MVT::i8, Args[i].first);
931 if (NumIntRegs < FASTCC_NUM_INT_ARGS_INREGS) {
932 RegValuesToPass.push_back(Args[i].first);
938 SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
939 PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
940 Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
941 Args[i].first, PtrOff,
942 DAG.getSrcValue(NULL)));
947 // Can pass (at least) part of it in regs?
948 if (NumIntRegs < FASTCC_NUM_INT_ARGS_INREGS) {
949 SDOperand Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, MVT::i32,
950 Args[i].first, DAG.getConstant(1, MVT::i32));
951 SDOperand Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, MVT::i32,
952 Args[i].first, DAG.getConstant(0, MVT::i32));
953 RegValuesToPass.push_back(Lo);
956 // Pass both parts in regs?
957 if (NumIntRegs < FASTCC_NUM_INT_ARGS_INREGS) {
958 RegValuesToPass.push_back(Hi);
961 // Pass the high part in memory.
962 SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
963 PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
964 Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
965 Hi, PtrOff, DAG.getSrcValue(NULL)));
972 SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
973 PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
974 Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
975 Args[i].first, PtrOff,
976 DAG.getSrcValue(NULL)));
982 Chain = DAG.getNode(ISD::TokenFactor, MVT::Other, Stores);
984 // Make sure the instruction takes 8n+4 bytes to make sure the start of the
985 // arguments and the arguments after the retaddr has been pushed are aligned.
986 if ((ArgOffset & 7) == 0)
989 std::vector<MVT::ValueType> RetVals;
990 MVT::ValueType RetTyVT = getValueType(RetTy);
992 RetVals.push_back(MVT::Other);
994 // The result values produced have to be legal. Promote the result.
996 case MVT::isVoid: break;
998 RetVals.push_back(RetTyVT);
1003 RetVals.push_back(MVT::i32);
1007 RetVals.push_back(MVT::f32);
1009 RetVals.push_back(MVT::f64);
1012 RetVals.push_back(MVT::i32);
1013 RetVals.push_back(MVT::i32);
1017 // Build a sequence of copy-to-reg nodes chained together with token chain
1018 // and flag operands which copy the outgoing args into registers.
1020 for (unsigned i = 0, e = RegValuesToPass.size(); i != e; ++i) {
1022 SDOperand RegToPass = RegValuesToPass[i];
1023 switch (RegToPass.getValueType()) {
1024 default: assert(0 && "Bad thing to pass in regs");
1026 CCReg = (i == 0) ? X86::AL : X86::DL;
1029 CCReg = (i == 0) ? X86::AX : X86::DX;
1032 CCReg = (i == 0) ? X86::EAX : X86::EDX;
1036 Chain = DAG.getCopyToReg(Chain, CCReg, RegToPass, InFlag);
1037 InFlag = Chain.getValue(1);
1040 std::vector<MVT::ValueType> NodeTys;
1041 NodeTys.push_back(MVT::Other); // Returns a chain
1042 NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
1043 std::vector<SDOperand> Ops;
1044 Ops.push_back(Chain);
1045 Ops.push_back(Callee);
1047 Ops.push_back(InFlag);
1049 // FIXME: Do not generate X86ISD::TAILCALL for now.
1050 Chain = DAG.getNode(X86ISD::CALL, NodeTys, Ops);
1051 InFlag = Chain.getValue(1);
1054 NodeTys.push_back(MVT::Other); // Returns a chain
1055 NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
1057 Ops.push_back(Chain);
1058 Ops.push_back(DAG.getConstant(ArgOffset, getPointerTy()));
1059 Ops.push_back(DAG.getConstant(ArgOffset, getPointerTy()));
1060 Ops.push_back(InFlag);
1061 Chain = DAG.getNode(ISD::CALLSEQ_END, NodeTys, Ops);
1062 InFlag = Chain.getValue(1);
1065 if (RetTyVT != MVT::isVoid) {
1067 default: assert(0 && "Unknown value type to return!");
1070 RetVal = DAG.getCopyFromReg(Chain, X86::AL, MVT::i8, InFlag);
1071 Chain = RetVal.getValue(1);
1072 if (RetTyVT == MVT::i1)
1073 RetVal = DAG.getNode(ISD::TRUNCATE, MVT::i1, RetVal);
1076 RetVal = DAG.getCopyFromReg(Chain, X86::AX, MVT::i16, InFlag);
1077 Chain = RetVal.getValue(1);
1080 RetVal = DAG.getCopyFromReg(Chain, X86::EAX, MVT::i32, InFlag);
1081 Chain = RetVal.getValue(1);
1084 SDOperand Lo = DAG.getCopyFromReg(Chain, X86::EAX, MVT::i32, InFlag);
1085 SDOperand Hi = DAG.getCopyFromReg(Lo.getValue(1), X86::EDX, MVT::i32,
1087 RetVal = DAG.getNode(ISD::BUILD_PAIR, MVT::i64, Lo, Hi);
1088 Chain = Hi.getValue(1);
1093 std::vector<MVT::ValueType> Tys;
1094 Tys.push_back(MVT::f64);
1095 Tys.push_back(MVT::Other);
1096 Tys.push_back(MVT::Flag);
1097 std::vector<SDOperand> Ops;
1098 Ops.push_back(Chain);
1099 Ops.push_back(InFlag);
1100 RetVal = DAG.getNode(X86ISD::FP_GET_RESULT, Tys, Ops);
1101 Chain = RetVal.getValue(1);
1102 InFlag = RetVal.getValue(2);
1104 // FIXME: Currently the FST is flagged to the FP_GET_RESULT. This
1105 // shouldn't be necessary except that RFP cannot be live across
1106 // multiple blocks. When stackifier is fixed, they can be uncoupled.
1107 MachineFunction &MF = DAG.getMachineFunction();
1108 int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8);
1109 SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
1111 Tys.push_back(MVT::Other);
1113 Ops.push_back(Chain);
1114 Ops.push_back(RetVal);
1115 Ops.push_back(StackSlot);
1116 Ops.push_back(DAG.getValueType(RetTyVT));
1117 Ops.push_back(InFlag);
1118 Chain = DAG.getNode(X86ISD::FST, Tys, Ops);
1119 RetVal = DAG.getLoad(RetTyVT, Chain, StackSlot,
1120 DAG.getSrcValue(NULL));
1121 Chain = RetVal.getValue(1);
1124 if (RetTyVT == MVT::f32 && !X86ScalarSSE)
1125 // FIXME: we would really like to remember that this FP_ROUND
1126 // operation is okay to eliminate if we allow excess FP precision.
1127 RetVal = DAG.getNode(ISD::FP_ROUND, MVT::f32, RetVal);
1133 return std::make_pair(RetVal, Chain);
1136 SDOperand X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) {
1137 if (ReturnAddrIndex == 0) {
1138 // Set up a frame object for the return address.
1139 MachineFunction &MF = DAG.getMachineFunction();
1140 ReturnAddrIndex = MF.getFrameInfo()->CreateFixedObject(4, -4);
1143 return DAG.getFrameIndex(ReturnAddrIndex, MVT::i32);
1148 std::pair<SDOperand, SDOperand> X86TargetLowering::
1149 LowerFrameReturnAddress(bool isFrameAddress, SDOperand Chain, unsigned Depth,
1150 SelectionDAG &DAG) {
1152 if (Depth) // Depths > 0 not supported yet!
1153 Result = DAG.getConstant(0, getPointerTy());
1155 SDOperand RetAddrFI = getReturnAddressFrameIndex(DAG);
1156 if (!isFrameAddress)
1157 // Just load the return address
1158 Result = DAG.getLoad(MVT::i32, DAG.getEntryNode(), RetAddrFI,
1159 DAG.getSrcValue(NULL));
1161 Result = DAG.getNode(ISD::SUB, MVT::i32, RetAddrFI,
1162 DAG.getConstant(4, MVT::i32));
1164 return std::make_pair(Result, Chain);
1167 /// getCondBrOpcodeForX86CC - Returns the X86 conditional branch opcode
1168 /// which corresponds to the condition code.
1169 static unsigned getCondBrOpcodeForX86CC(unsigned X86CC) {
1171 default: assert(0 && "Unknown X86 conditional code!");
1172 case X86ISD::COND_A: return X86::JA;
1173 case X86ISD::COND_AE: return X86::JAE;
1174 case X86ISD::COND_B: return X86::JB;
1175 case X86ISD::COND_BE: return X86::JBE;
1176 case X86ISD::COND_E: return X86::JE;
1177 case X86ISD::COND_G: return X86::JG;
1178 case X86ISD::COND_GE: return X86::JGE;
1179 case X86ISD::COND_L: return X86::JL;
1180 case X86ISD::COND_LE: return X86::JLE;
1181 case X86ISD::COND_NE: return X86::JNE;
1182 case X86ISD::COND_NO: return X86::JNO;
1183 case X86ISD::COND_NP: return X86::JNP;
1184 case X86ISD::COND_NS: return X86::JNS;
1185 case X86ISD::COND_O: return X86::JO;
1186 case X86ISD::COND_P: return X86::JP;
1187 case X86ISD::COND_S: return X86::JS;
1191 /// translateX86CC - do a one to one translation of a ISD::CondCode to the X86
1192 /// specific condition code. It returns a false if it cannot do a direct
1193 /// translation. X86CC is the translated CondCode. Flip is set to true if the
1194 /// the order of comparison operands should be flipped.
1195 static bool translateX86CC(ISD::CondCode SetCCOpcode, bool isFP,
1196 unsigned &X86CC, bool &Flip) {
1198 X86CC = X86ISD::COND_INVALID;
1200 switch (SetCCOpcode) {
1202 case ISD::SETEQ: X86CC = X86ISD::COND_E; break;
1203 case ISD::SETGT: X86CC = X86ISD::COND_G; break;
1204 case ISD::SETGE: X86CC = X86ISD::COND_GE; break;
1205 case ISD::SETLT: X86CC = X86ISD::COND_L; break;
1206 case ISD::SETLE: X86CC = X86ISD::COND_LE; break;
1207 case ISD::SETNE: X86CC = X86ISD::COND_NE; break;
1208 case ISD::SETULT: X86CC = X86ISD::COND_B; break;
1209 case ISD::SETUGT: X86CC = X86ISD::COND_A; break;
1210 case ISD::SETULE: X86CC = X86ISD::COND_BE; break;
1211 case ISD::SETUGE: X86CC = X86ISD::COND_AE; break;
1214 // On a floating point condition, the flags are set as follows:
1216 // 0 | 0 | 0 | X > Y
1217 // 0 | 0 | 1 | X < Y
1218 // 1 | 0 | 0 | X == Y
1219 // 1 | 1 | 1 | unordered
1220 switch (SetCCOpcode) {
1223 case ISD::SETEQ: X86CC = X86ISD::COND_E; break;
1224 case ISD::SETOLT: Flip = true; // Fallthrough
1226 case ISD::SETGT: X86CC = X86ISD::COND_A; break;
1227 case ISD::SETOLE: Flip = true; // Fallthrough
1229 case ISD::SETGE: X86CC = X86ISD::COND_AE; break;
1230 case ISD::SETUGT: Flip = true; // Fallthrough
1232 case ISD::SETLT: X86CC = X86ISD::COND_B; break;
1233 case ISD::SETUGE: Flip = true; // Fallthrough
1235 case ISD::SETLE: X86CC = X86ISD::COND_BE; break;
1237 case ISD::SETNE: X86CC = X86ISD::COND_NE; break;
1238 case ISD::SETUO: X86CC = X86ISD::COND_P; break;
1239 case ISD::SETO: X86CC = X86ISD::COND_NP; break;
1243 return X86CC != X86ISD::COND_INVALID;
1246 static bool translateX86CC(SDOperand CC, bool isFP, unsigned &X86CC,
1248 return translateX86CC(cast<CondCodeSDNode>(CC)->get(), isFP, X86CC, Flip);
1251 /// hasFPCMov - is there a floating point cmov for the specific X86 condition
1252 /// code. Current x86 isa includes the following FP cmov instructions:
1253 /// fcmovb, fcomvbe, fcomve, fcmovu, fcmovae, fcmova, fcmovne, fcmovnu.
1254 static bool hasFPCMov(unsigned X86CC) {
1258 case X86ISD::COND_B:
1259 case X86ISD::COND_BE:
1260 case X86ISD::COND_E:
1261 case X86ISD::COND_P:
1262 case X86ISD::COND_A:
1263 case X86ISD::COND_AE:
1264 case X86ISD::COND_NE:
1265 case X86ISD::COND_NP:
1271 X86TargetLowering::InsertAtEndOfBasicBlock(MachineInstr *MI,
1272 MachineBasicBlock *BB) {
1273 switch (MI->getOpcode()) {
1274 default: assert(false && "Unexpected instr type to insert");
1275 case X86::CMOV_FR32:
1276 case X86::CMOV_FR64:
1277 case X86::CMOV_V4F32:
1278 case X86::CMOV_V2F64:
1279 case X86::CMOV_V2I64: {
1280 // To "insert" a SELECT_CC instruction, we actually have to insert the
1281 // diamond control-flow pattern. The incoming instruction knows the
1282 // destination vreg to set, the condition code register to branch on, the
1283 // true/false values to select between, and a branch opcode to use.
1284 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1285 ilist<MachineBasicBlock>::iterator It = BB;
1291 // cmpTY ccX, r1, r2
1293 // fallthrough --> copy0MBB
1294 MachineBasicBlock *thisMBB = BB;
1295 MachineBasicBlock *copy0MBB = new MachineBasicBlock(LLVM_BB);
1296 MachineBasicBlock *sinkMBB = new MachineBasicBlock(LLVM_BB);
1297 unsigned Opc = getCondBrOpcodeForX86CC(MI->getOperand(3).getImmedValue());
1298 BuildMI(BB, Opc, 1).addMBB(sinkMBB);
1299 MachineFunction *F = BB->getParent();
1300 F->getBasicBlockList().insert(It, copy0MBB);
1301 F->getBasicBlockList().insert(It, sinkMBB);
1302 // Update machine-CFG edges by first adding all successors of the current
1303 // block to the new block which will contain the Phi node for the select.
1304 for(MachineBasicBlock::succ_iterator i = BB->succ_begin(),
1305 e = BB->succ_end(); i != e; ++i)
1306 sinkMBB->addSuccessor(*i);
1307 // Next, remove all successors of the current block, and add the true
1308 // and fallthrough blocks as its successors.
1309 while(!BB->succ_empty())
1310 BB->removeSuccessor(BB->succ_begin());
1311 BB->addSuccessor(copy0MBB);
1312 BB->addSuccessor(sinkMBB);
1315 // %FalseValue = ...
1316 // # fallthrough to sinkMBB
1319 // Update machine-CFG edges
1320 BB->addSuccessor(sinkMBB);
1323 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
1326 BuildMI(BB, X86::PHI, 4, MI->getOperand(0).getReg())
1327 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
1328 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
1330 delete MI; // The pseudo instruction is gone now.
1334 case X86::FP_TO_INT16_IN_MEM:
1335 case X86::FP_TO_INT32_IN_MEM:
1336 case X86::FP_TO_INT64_IN_MEM: {
1337 // Change the floating point control register to use "round towards zero"
1338 // mode when truncating to an integer value.
1339 MachineFunction *F = BB->getParent();
1340 int CWFrameIdx = F->getFrameInfo()->CreateStackObject(2, 2);
1341 addFrameReference(BuildMI(BB, X86::FNSTCW16m, 4), CWFrameIdx);
1343 // Load the old value of the high byte of the control word...
1345 F->getSSARegMap()->createVirtualRegister(X86::R16RegisterClass);
1346 addFrameReference(BuildMI(BB, X86::MOV16rm, 4, OldCW), CWFrameIdx);
1348 // Set the high part to be round to zero...
1349 addFrameReference(BuildMI(BB, X86::MOV16mi, 5), CWFrameIdx).addImm(0xC7F);
1351 // Reload the modified control word now...
1352 addFrameReference(BuildMI(BB, X86::FLDCW16m, 4), CWFrameIdx);
1354 // Restore the memory image of control word to original value
1355 addFrameReference(BuildMI(BB, X86::MOV16mr, 5), CWFrameIdx).addReg(OldCW);
1357 // Get the X86 opcode to use.
1359 switch (MI->getOpcode()) {
1360 default: assert(0 && "illegal opcode!");
1361 case X86::FP_TO_INT16_IN_MEM: Opc = X86::FpIST16m; break;
1362 case X86::FP_TO_INT32_IN_MEM: Opc = X86::FpIST32m; break;
1363 case X86::FP_TO_INT64_IN_MEM: Opc = X86::FpIST64m; break;
1367 MachineOperand &Op = MI->getOperand(0);
1368 if (Op.isRegister()) {
1369 AM.BaseType = X86AddressMode::RegBase;
1370 AM.Base.Reg = Op.getReg();
1372 AM.BaseType = X86AddressMode::FrameIndexBase;
1373 AM.Base.FrameIndex = Op.getFrameIndex();
1375 Op = MI->getOperand(1);
1376 if (Op.isImmediate())
1377 AM.Scale = Op.getImmedValue();
1378 Op = MI->getOperand(2);
1379 if (Op.isImmediate())
1380 AM.IndexReg = Op.getImmedValue();
1381 Op = MI->getOperand(3);
1382 if (Op.isGlobalAddress()) {
1383 AM.GV = Op.getGlobal();
1385 AM.Disp = Op.getImmedValue();
1387 addFullAddress(BuildMI(BB, Opc, 5), AM).addReg(MI->getOperand(4).getReg());
1389 // Reload the original control word now.
1390 addFrameReference(BuildMI(BB, X86::FLDCW16m, 4), CWFrameIdx);
1392 delete MI; // The pseudo instruction is gone now.
1399 //===----------------------------------------------------------------------===//
1400 // X86 Custom Lowering Hooks
1401 //===----------------------------------------------------------------------===//
1403 /// DarwinGVRequiresExtraLoad - true if accessing the GV requires an extra
1404 /// load. For Darwin, external and weak symbols are indirect, loading the value
1405 /// at address GV rather then the value of GV itself. This means that the
1406 /// GlobalAddress must be in the base or index register of the address, not the
1407 /// GV offset field.
1408 static bool DarwinGVRequiresExtraLoad(GlobalValue *GV) {
1409 return (GV->hasWeakLinkage() || GV->hasLinkOnceLinkage() ||
1410 (GV->isExternal() && !GV->hasNotBeenReadFromBytecode()));
1413 /// isUndefOrInRange - Op is either an undef node or a ConstantSDNode. Return
1414 /// true if Op is undef or if its value falls within the specified range (L, H].
1415 static bool isUndefOrInRange(SDOperand Op, unsigned Low, unsigned Hi) {
1416 if (Op.getOpcode() == ISD::UNDEF)
1419 unsigned Val = cast<ConstantSDNode>(Op)->getValue();
1420 return (Val >= Low && Val < Hi);
1423 /// isUndefOrEqual - Op is either an undef node or a ConstantSDNode. Return
1424 /// true if Op is undef or if its value equal to the specified value.
1425 static bool isUndefOrEqual(SDOperand Op, unsigned Val) {
1426 if (Op.getOpcode() == ISD::UNDEF)
1428 return cast<ConstantSDNode>(Op)->getValue() == Val;
1431 /// isPSHUFDMask - Return true if the specified VECTOR_SHUFFLE operand
1432 /// specifies a shuffle of elements that is suitable for input to PSHUFD.
1433 bool X86::isPSHUFDMask(SDNode *N) {
1434 assert(N->getOpcode() == ISD::BUILD_VECTOR);
1436 if (N->getNumOperands() != 4)
1439 // Check if the value doesn't reference the second vector.
1440 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
1441 SDOperand Arg = N->getOperand(i);
1442 if (Arg.getOpcode() == ISD::UNDEF) continue;
1443 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
1444 if (cast<ConstantSDNode>(Arg)->getValue() >= 4)
1451 /// isPSHUFHWMask - Return true if the specified VECTOR_SHUFFLE operand
1452 /// specifies a shuffle of elements that is suitable for input to PSHUFHW.
1453 bool X86::isPSHUFHWMask(SDNode *N) {
1454 assert(N->getOpcode() == ISD::BUILD_VECTOR);
1456 if (N->getNumOperands() != 8)
1459 // Lower quadword copied in order.
1460 for (unsigned i = 0; i != 4; ++i) {
1461 SDOperand Arg = N->getOperand(i);
1462 if (Arg.getOpcode() == ISD::UNDEF) continue;
1463 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
1464 if (cast<ConstantSDNode>(Arg)->getValue() != i)
1468 // Upper quadword shuffled.
1469 for (unsigned i = 4; i != 8; ++i) {
1470 SDOperand Arg = N->getOperand(i);
1471 if (Arg.getOpcode() == ISD::UNDEF) continue;
1472 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
1473 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
1474 if (Val < 4 || Val > 7)
1481 /// isPSHUFLWMask - Return true if the specified VECTOR_SHUFFLE operand
1482 /// specifies a shuffle of elements that is suitable for input to PSHUFLW.
1483 bool X86::isPSHUFLWMask(SDNode *N) {
1484 assert(N->getOpcode() == ISD::BUILD_VECTOR);
1486 if (N->getNumOperands() != 8)
1489 // Upper quadword copied in order.
1490 for (unsigned i = 4; i != 8; ++i)
1491 if (!isUndefOrEqual(N->getOperand(i), i))
1494 // Lower quadword shuffled.
1495 for (unsigned i = 0; i != 4; ++i)
1496 if (!isUndefOrInRange(N->getOperand(i), 0, 4))
1502 /// isSHUFPMask - Return true if the specified VECTOR_SHUFFLE operand
1503 /// specifies a shuffle of elements that is suitable for input to SHUFP*.
1504 bool X86::isSHUFPMask(SDNode *N) {
1505 assert(N->getOpcode() == ISD::BUILD_VECTOR);
1507 unsigned NumElems = N->getNumOperands();
1508 if (NumElems == 2) {
1509 // The only cases that ought be handled by SHUFPD is
1510 // Dest { 2, 1 } <= shuffle( Dest { 1, 0 }, Src { 3, 2 }
1511 // Dest { 3, 0 } <= shuffle( Dest { 1, 0 }, Src { 3, 2 }
1512 // Expect bit 0 == 1, bit1 == 2
1513 SDOperand Bit0 = N->getOperand(0);
1514 SDOperand Bit1 = N->getOperand(1);
1515 if (isUndefOrEqual(Bit0, 0) && isUndefOrEqual(Bit1, 3))
1517 if (isUndefOrEqual(Bit0, 1) && isUndefOrEqual(Bit1, 2))
1522 if (NumElems != 4) return false;
1524 // Each half must refer to only one of the vector.
1525 for (unsigned i = 0; i < 2; ++i) {
1526 SDOperand Arg = N->getOperand(i);
1527 if (Arg.getOpcode() == ISD::UNDEF) continue;
1528 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
1529 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
1530 if (Val >= 4) return false;
1532 for (unsigned i = 2; i < 4; ++i) {
1533 SDOperand Arg = N->getOperand(i);
1534 if (Arg.getOpcode() == ISD::UNDEF) continue;
1535 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
1536 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
1537 if (Val < 4) return false;
1543 /// isMOVHLPSMask - Return true if the specified VECTOR_SHUFFLE operand
1544 /// specifies a shuffle of elements that is suitable for input to MOVHLPS.
1545 bool X86::isMOVHLPSMask(SDNode *N) {
1546 assert(N->getOpcode() == ISD::BUILD_VECTOR);
1548 if (N->getNumOperands() != 4)
1551 // Expect bit0 == 6, bit1 == 7, bit2 == 2, bit3 == 3
1552 return isUndefOrEqual(N->getOperand(0), 6) &&
1553 isUndefOrEqual(N->getOperand(1), 7) &&
1554 isUndefOrEqual(N->getOperand(2), 2) &&
1555 isUndefOrEqual(N->getOperand(3), 3);
1558 /// isMOVLPMask - Return true if the specified VECTOR_SHUFFLE operand
1559 /// specifies a shuffle of elements that is suitable for input to MOVLP{S|D}.
1560 bool X86::isMOVLPMask(SDNode *N) {
1561 assert(N->getOpcode() == ISD::BUILD_VECTOR);
1563 unsigned NumElems = N->getNumOperands();
1564 if (NumElems != 2 && NumElems != 4)
1567 for (unsigned i = 0; i < NumElems/2; ++i)
1568 if (!isUndefOrEqual(N->getOperand(i), i + NumElems))
1571 for (unsigned i = NumElems/2; i < NumElems; ++i)
1572 if (!isUndefOrEqual(N->getOperand(i), i))
1578 /// isMOVHPMask - Return true if the specified VECTOR_SHUFFLE operand
1579 /// specifies a shuffle of elements that is suitable for input to MOVHP{S|D}
1581 bool X86::isMOVHPMask(SDNode *N) {
1582 assert(N->getOpcode() == ISD::BUILD_VECTOR);
1584 unsigned NumElems = N->getNumOperands();
1585 if (NumElems != 2 && NumElems != 4)
1588 for (unsigned i = 0; i < NumElems/2; ++i)
1589 if (!isUndefOrEqual(N->getOperand(i), i))
1592 for (unsigned i = 0; i < NumElems/2; ++i) {
1593 SDOperand Arg = N->getOperand(i + NumElems/2);
1594 if (!isUndefOrEqual(Arg, i + NumElems))
1601 /// isUNPCKLMask - Return true if the specified VECTOR_SHUFFLE operand
1602 /// specifies a shuffle of elements that is suitable for input to UNPCKL.
1603 bool X86::isUNPCKLMask(SDNode *N) {
1604 assert(N->getOpcode() == ISD::BUILD_VECTOR);
1606 unsigned NumElems = N->getNumOperands();
1607 if (NumElems != 2 && NumElems != 4 && NumElems != 8 && NumElems != 16)
1610 for (unsigned i = 0, j = 0; i != NumElems; i += 2, ++j) {
1611 SDOperand BitI = N->getOperand(i);
1612 SDOperand BitI1 = N->getOperand(i+1);
1613 if (!isUndefOrEqual(BitI, j))
1615 if (!isUndefOrEqual(BitI1, j + NumElems))
1622 /// isUNPCKHMask - Return true if the specified VECTOR_SHUFFLE operand
1623 /// specifies a shuffle of elements that is suitable for input to UNPCKH.
1624 bool X86::isUNPCKHMask(SDNode *N) {
1625 assert(N->getOpcode() == ISD::BUILD_VECTOR);
1627 unsigned NumElems = N->getNumOperands();
1628 if (NumElems != 2 && NumElems != 4 && NumElems != 8 && NumElems != 16)
1631 for (unsigned i = 0, j = 0; i != NumElems; i += 2, ++j) {
1632 SDOperand BitI = N->getOperand(i);
1633 SDOperand BitI1 = N->getOperand(i+1);
1634 if (!isUndefOrEqual(BitI, j + NumElems/2))
1636 if (!isUndefOrEqual(BitI1, j + NumElems/2 + NumElems))
1643 /// isUNPCKL_v_undef_Mask - Special case of isUNPCKLMask for canonical form
1644 /// of vector_shuffle v, v, <0, 4, 1, 5>, i.e. vector_shuffle v, undef,
1646 bool X86::isUNPCKL_v_undef_Mask(SDNode *N) {
1647 assert(N->getOpcode() == ISD::BUILD_VECTOR);
1649 unsigned NumElems = N->getNumOperands();
1650 if (NumElems != 4 && NumElems != 8 && NumElems != 16)
1653 for (unsigned i = 0, j = 0; i != NumElems; i += 2, ++j) {
1654 SDOperand BitI = N->getOperand(i);
1655 SDOperand BitI1 = N->getOperand(i+1);
1657 if (!isUndefOrEqual(BitI, j))
1659 if (!isUndefOrEqual(BitI1, j))
1666 /// isMOVSMask - Return true if the specified VECTOR_SHUFFLE operand
1667 /// specifies a shuffle of elements that is suitable for input to MOVS{S|D}.
1668 bool X86::isMOVSMask(SDNode *N) {
1669 assert(N->getOpcode() == ISD::BUILD_VECTOR);
1671 unsigned NumElems = N->getNumOperands();
1672 if (NumElems != 2 && NumElems != 4)
1675 if (!isUndefOrEqual(N->getOperand(0), NumElems))
1678 for (unsigned i = 1; i < NumElems; ++i) {
1679 SDOperand Arg = N->getOperand(i);
1680 if (!isUndefOrEqual(Arg, i))
1687 /// isMOVSHDUPMask - Return true if the specified VECTOR_SHUFFLE operand
1688 /// specifies a shuffle of elements that is suitable for input to MOVSHDUP.
1689 bool X86::isMOVSHDUPMask(SDNode *N) {
1690 assert(N->getOpcode() == ISD::BUILD_VECTOR);
1692 if (N->getNumOperands() != 4)
1695 // Expect 1, 1, 3, 3
1696 for (unsigned i = 0; i < 2; ++i) {
1697 SDOperand Arg = N->getOperand(i);
1698 if (Arg.getOpcode() == ISD::UNDEF) continue;
1699 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
1700 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
1701 if (Val != 1) return false;
1705 for (unsigned i = 2; i < 4; ++i) {
1706 SDOperand Arg = N->getOperand(i);
1707 if (Arg.getOpcode() == ISD::UNDEF) continue;
1708 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
1709 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
1710 if (Val != 3) return false;
1714 // Don't use movshdup if it can be done with a shufps.
1718 /// isMOVSLDUPMask - Return true if the specified VECTOR_SHUFFLE operand
1719 /// specifies a shuffle of elements that is suitable for input to MOVSLDUP.
1720 bool X86::isMOVSLDUPMask(SDNode *N) {
1721 assert(N->getOpcode() == ISD::BUILD_VECTOR);
1723 if (N->getNumOperands() != 4)
1726 // Expect 0, 0, 2, 2
1727 for (unsigned i = 0; i < 2; ++i) {
1728 SDOperand Arg = N->getOperand(i);
1729 if (Arg.getOpcode() == ISD::UNDEF) continue;
1730 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
1731 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
1732 if (Val != 0) return false;
1736 for (unsigned i = 2; i < 4; ++i) {
1737 SDOperand Arg = N->getOperand(i);
1738 if (Arg.getOpcode() == ISD::UNDEF) continue;
1739 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
1740 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
1741 if (Val != 2) return false;
1745 // Don't use movshdup if it can be done with a shufps.
1749 /// isSplatMask - Return true if the specified VECTOR_SHUFFLE operand specifies
1750 /// a splat of a single element.
1751 static bool isSplatMask(SDNode *N) {
1752 assert(N->getOpcode() == ISD::BUILD_VECTOR);
1754 // This is a splat operation if each element of the permute is the same, and
1755 // if the value doesn't reference the second vector.
1756 unsigned NumElems = N->getNumOperands();
1757 SDOperand ElementBase;
1759 for (; i != NumElems; ++i) {
1760 SDOperand Elt = N->getOperand(i);
1761 if (ConstantSDNode *EltV = dyn_cast<ConstantSDNode>(Elt)) {
1767 if (!ElementBase.Val)
1770 for (; i != NumElems; ++i) {
1771 SDOperand Arg = N->getOperand(i);
1772 if (Arg.getOpcode() == ISD::UNDEF) continue;
1773 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
1774 if (Arg != ElementBase) return false;
1777 // Make sure it is a splat of the first vector operand.
1778 return cast<ConstantSDNode>(ElementBase)->getValue() < NumElems;
1781 /// isSplatMask - Return true if the specified VECTOR_SHUFFLE operand specifies
1782 /// a splat of a single element and it's a 2 or 4 element mask.
1783 bool X86::isSplatMask(SDNode *N) {
1784 assert(N->getOpcode() == ISD::BUILD_VECTOR);
1786 // We can only splat 64-bit, and 32-bit quantities with a single instruction.
1787 if (N->getNumOperands() != 4 && N->getNumOperands() != 2)
1789 return ::isSplatMask(N);
1792 /// getShuffleSHUFImmediate - Return the appropriate immediate to shuffle
1793 /// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUF* and SHUFP*
1795 unsigned X86::getShuffleSHUFImmediate(SDNode *N) {
1796 unsigned NumOperands = N->getNumOperands();
1797 unsigned Shift = (NumOperands == 4) ? 2 : 1;
1799 for (unsigned i = 0; i < NumOperands; ++i) {
1801 SDOperand Arg = N->getOperand(NumOperands-i-1);
1802 if (Arg.getOpcode() != ISD::UNDEF)
1803 Val = cast<ConstantSDNode>(Arg)->getValue();
1804 if (Val >= NumOperands) Val -= NumOperands;
1806 if (i != NumOperands - 1)
1813 /// getShufflePSHUFHWImmediate - Return the appropriate immediate to shuffle
1814 /// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUFHW
1816 unsigned X86::getShufflePSHUFHWImmediate(SDNode *N) {
1818 // 8 nodes, but we only care about the last 4.
1819 for (unsigned i = 7; i >= 4; --i) {
1821 SDOperand Arg = N->getOperand(i);
1822 if (Arg.getOpcode() != ISD::UNDEF)
1823 Val = cast<ConstantSDNode>(Arg)->getValue();
1832 /// getShufflePSHUFLWImmediate - Return the appropriate immediate to shuffle
1833 /// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUFLW
1835 unsigned X86::getShufflePSHUFLWImmediate(SDNode *N) {
1837 // 8 nodes, but we only care about the first 4.
1838 for (int i = 3; i >= 0; --i) {
1840 SDOperand Arg = N->getOperand(i);
1841 if (Arg.getOpcode() != ISD::UNDEF)
1842 Val = cast<ConstantSDNode>(Arg)->getValue();
1851 /// isPSHUFHW_PSHUFLWMask - true if the specified VECTOR_SHUFFLE operand
1852 /// specifies a 8 element shuffle that can be broken into a pair of
1853 /// PSHUFHW and PSHUFLW.
1854 static bool isPSHUFHW_PSHUFLWMask(SDNode *N) {
1855 assert(N->getOpcode() == ISD::BUILD_VECTOR);
1857 if (N->getNumOperands() != 8)
1860 // Lower quadword shuffled.
1861 for (unsigned i = 0; i != 4; ++i) {
1862 SDOperand Arg = N->getOperand(i);
1863 if (Arg.getOpcode() == ISD::UNDEF) continue;
1864 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
1865 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
1870 // Upper quadword shuffled.
1871 for (unsigned i = 4; i != 8; ++i) {
1872 SDOperand Arg = N->getOperand(i);
1873 if (Arg.getOpcode() == ISD::UNDEF) continue;
1874 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
1875 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
1876 if (Val < 4 || Val > 7)
1883 /// CommuteVectorShuffle - Swap vector_shuffle operandsas well as
1884 /// values in ther permute mask.
1885 static SDOperand CommuteVectorShuffle(SDOperand Op, SelectionDAG &DAG) {
1886 SDOperand V1 = Op.getOperand(0);
1887 SDOperand V2 = Op.getOperand(1);
1888 SDOperand Mask = Op.getOperand(2);
1889 MVT::ValueType VT = Op.getValueType();
1890 MVT::ValueType MaskVT = Mask.getValueType();
1891 MVT::ValueType EltVT = MVT::getVectorBaseType(MaskVT);
1892 unsigned NumElems = Mask.getNumOperands();
1893 std::vector<SDOperand> MaskVec;
1895 for (unsigned i = 0; i != NumElems; ++i) {
1896 SDOperand Arg = Mask.getOperand(i);
1897 if (Arg.getOpcode() == ISD::UNDEF) {
1898 MaskVec.push_back(DAG.getNode(ISD::UNDEF, EltVT));
1901 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
1902 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
1904 MaskVec.push_back(DAG.getConstant(Val + NumElems, EltVT));
1906 MaskVec.push_back(DAG.getConstant(Val - NumElems, EltVT));
1909 Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, MaskVec);
1910 return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V2, V1, Mask);
1913 /// ShouldXformToMOVHLPS - Return true if the node should be transformed to
1914 /// match movhlps. The lower half elements should come from upper half of
1915 /// V1 (and in order), and the upper half elements should come from the upper
1916 /// half of V2 (and in order).
1917 static bool ShouldXformToMOVHLPS(SDNode *Mask) {
1918 unsigned NumElems = Mask->getNumOperands();
1921 for (unsigned i = 0, e = 2; i != e; ++i)
1922 if (!isUndefOrEqual(Mask->getOperand(i), i+2))
1924 for (unsigned i = 2; i != 4; ++i)
1925 if (!isUndefOrEqual(Mask->getOperand(i), i+4))
1930 /// isScalarLoadToVector - Returns true if the node is a scalar load that
1931 /// is promoted to a vector.
1932 static inline bool isScalarLoadToVector(SDNode *N) {
1933 if (N->getOpcode() == ISD::SCALAR_TO_VECTOR) {
1934 N = N->getOperand(0).Val;
1935 return (N->getOpcode() == ISD::LOAD);
1940 /// ShouldXformToMOVLP{S|D} - Return true if the node should be transformed to
1941 /// match movlp{s|d}. The lower half elements should come from lower half of
1942 /// V1 (and in order), and the upper half elements should come from the upper
1943 /// half of V2 (and in order). And since V1 will become the source of the
1944 /// MOVLP, it must be either a vector load or a scalar load to vector.
1945 static bool ShouldXformToMOVLP(SDNode *V1, SDNode *Mask) {
1946 if (V1->getOpcode() != ISD::LOAD && !isScalarLoadToVector(V1))
1949 unsigned NumElems = Mask->getNumOperands();
1950 if (NumElems != 2 && NumElems != 4)
1952 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
1953 if (!isUndefOrEqual(Mask->getOperand(i), i))
1955 for (unsigned i = NumElems/2; i != NumElems; ++i)
1956 if (!isUndefOrEqual(Mask->getOperand(i), i+NumElems))
1961 /// isLowerFromV2UpperFromV1 - Returns true if the shuffle mask is except
1962 /// the reverse of what x86 shuffles want. x86 shuffles requires the lower
1963 /// half elements to come from vector 1 (which would equal the dest.) and
1964 /// the upper half to come from vector 2.
1965 static bool isLowerFromV2UpperFromV1(SDOperand Op) {
1966 assert(Op.getOpcode() == ISD::BUILD_VECTOR);
1968 unsigned NumElems = Op.getNumOperands();
1969 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
1970 if (!isUndefOrInRange(Op.getOperand(i), NumElems, NumElems*2))
1972 for (unsigned i = NumElems/2; i != NumElems; ++i)
1973 if (!isUndefOrInRange(Op.getOperand(i), 0, NumElems))
1978 /// getUnpacklMask - Returns a vector_shuffle mask for an unpackl operation
1979 /// of specified width.
1980 static SDOperand getUnpacklMask(unsigned NumElems, SelectionDAG &DAG) {
1981 MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
1982 MVT::ValueType BaseVT = MVT::getVectorBaseType(MaskVT);
1983 std::vector<SDOperand> MaskVec;
1984 for (unsigned i = 0, e = NumElems/2; i != e; ++i) {
1985 MaskVec.push_back(DAG.getConstant(i, BaseVT));
1986 MaskVec.push_back(DAG.getConstant(i + NumElems, BaseVT));
1988 return DAG.getNode(ISD::BUILD_VECTOR, MaskVT, MaskVec);
1991 /// PromoteSplat - Promote a splat of v8i16 or v16i8 to v4i32.
1993 static SDOperand PromoteSplat(SDOperand Op, SelectionDAG &DAG) {
1994 SDOperand V1 = Op.getOperand(0);
1995 SDOperand PermMask = Op.getOperand(2);
1996 MVT::ValueType VT = Op.getValueType();
1997 unsigned NumElems = PermMask.getNumOperands();
1998 PermMask = getUnpacklMask(NumElems, DAG);
1999 while (NumElems != 4) {
2000 V1 = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V1, PermMask);
2003 V1 = DAG.getNode(ISD::BIT_CONVERT, MVT::v4i32, V1);
2005 MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(4);
2006 SDOperand Zero = DAG.getConstant(0, MVT::getVectorBaseType(MaskVT));
2007 std::vector<SDOperand> ZeroVec(4, Zero);
2008 SDOperand SplatMask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, ZeroVec);
2009 SDOperand Shuffle = DAG.getNode(ISD::VECTOR_SHUFFLE, MVT::v4i32, V1,
2010 DAG.getNode(ISD::UNDEF, MVT::v4i32),
2012 return DAG.getNode(ISD::BIT_CONVERT, VT, Shuffle);
2015 /// LowerOperation - Provide custom lowering hooks for some operations.
2017 SDOperand X86TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
2018 switch (Op.getOpcode()) {
2019 default: assert(0 && "Should not custom lower this!");
2020 case ISD::SHL_PARTS:
2021 case ISD::SRA_PARTS:
2022 case ISD::SRL_PARTS: {
2023 assert(Op.getNumOperands() == 3 && Op.getValueType() == MVT::i32 &&
2024 "Not an i64 shift!");
2025 bool isSRA = Op.getOpcode() == ISD::SRA_PARTS;
2026 SDOperand ShOpLo = Op.getOperand(0);
2027 SDOperand ShOpHi = Op.getOperand(1);
2028 SDOperand ShAmt = Op.getOperand(2);
2029 SDOperand Tmp1 = isSRA ? DAG.getNode(ISD::SRA, MVT::i32, ShOpHi,
2030 DAG.getConstant(31, MVT::i8))
2031 : DAG.getConstant(0, MVT::i32);
2033 SDOperand Tmp2, Tmp3;
2034 if (Op.getOpcode() == ISD::SHL_PARTS) {
2035 Tmp2 = DAG.getNode(X86ISD::SHLD, MVT::i32, ShOpHi, ShOpLo, ShAmt);
2036 Tmp3 = DAG.getNode(ISD::SHL, MVT::i32, ShOpLo, ShAmt);
2038 Tmp2 = DAG.getNode(X86ISD::SHRD, MVT::i32, ShOpLo, ShOpHi, ShAmt);
2039 Tmp3 = DAG.getNode(isSRA ? ISD::SRA : ISD::SRL, MVT::i32, ShOpHi, ShAmt);
2042 SDOperand InFlag = DAG.getNode(X86ISD::TEST, MVT::Flag,
2043 ShAmt, DAG.getConstant(32, MVT::i8));
2046 SDOperand CC = DAG.getConstant(X86ISD::COND_NE, MVT::i8);
2048 std::vector<MVT::ValueType> Tys;
2049 Tys.push_back(MVT::i32);
2050 Tys.push_back(MVT::Flag);
2051 std::vector<SDOperand> Ops;
2052 if (Op.getOpcode() == ISD::SHL_PARTS) {
2053 Ops.push_back(Tmp2);
2054 Ops.push_back(Tmp3);
2056 Ops.push_back(InFlag);
2057 Hi = DAG.getNode(X86ISD::CMOV, Tys, Ops);
2058 InFlag = Hi.getValue(1);
2061 Ops.push_back(Tmp3);
2062 Ops.push_back(Tmp1);
2064 Ops.push_back(InFlag);
2065 Lo = DAG.getNode(X86ISD::CMOV, Tys, Ops);
2067 Ops.push_back(Tmp2);
2068 Ops.push_back(Tmp3);
2070 Ops.push_back(InFlag);
2071 Lo = DAG.getNode(X86ISD::CMOV, Tys, Ops);
2072 InFlag = Lo.getValue(1);
2075 Ops.push_back(Tmp3);
2076 Ops.push_back(Tmp1);
2078 Ops.push_back(InFlag);
2079 Hi = DAG.getNode(X86ISD::CMOV, Tys, Ops);
2083 Tys.push_back(MVT::i32);
2084 Tys.push_back(MVT::i32);
2088 return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops);
2090 case ISD::SINT_TO_FP: {
2091 assert(Op.getOperand(0).getValueType() <= MVT::i64 &&
2092 Op.getOperand(0).getValueType() >= MVT::i16 &&
2093 "Unknown SINT_TO_FP to lower!");
2096 MVT::ValueType SrcVT = Op.getOperand(0).getValueType();
2097 unsigned Size = MVT::getSizeInBits(SrcVT)/8;
2098 MachineFunction &MF = DAG.getMachineFunction();
2099 int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size);
2100 SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
2101 SDOperand Chain = DAG.getNode(ISD::STORE, MVT::Other,
2102 DAG.getEntryNode(), Op.getOperand(0),
2103 StackSlot, DAG.getSrcValue(NULL));
2106 std::vector<MVT::ValueType> Tys;
2107 Tys.push_back(MVT::f64);
2108 Tys.push_back(MVT::Other);
2109 if (X86ScalarSSE) Tys.push_back(MVT::Flag);
2110 std::vector<SDOperand> Ops;
2111 Ops.push_back(Chain);
2112 Ops.push_back(StackSlot);
2113 Ops.push_back(DAG.getValueType(SrcVT));
2114 Result = DAG.getNode(X86ScalarSSE ? X86ISD::FILD_FLAG :X86ISD::FILD,
2118 Chain = Result.getValue(1);
2119 SDOperand InFlag = Result.getValue(2);
2121 // FIXME: Currently the FST is flagged to the FILD_FLAG. This
2122 // shouldn't be necessary except that RFP cannot be live across
2123 // multiple blocks. When stackifier is fixed, they can be uncoupled.
2124 MachineFunction &MF = DAG.getMachineFunction();
2125 int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8);
2126 SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
2127 std::vector<MVT::ValueType> Tys;
2128 Tys.push_back(MVT::Other);
2129 std::vector<SDOperand> Ops;
2130 Ops.push_back(Chain);
2131 Ops.push_back(Result);
2132 Ops.push_back(StackSlot);
2133 Ops.push_back(DAG.getValueType(Op.getValueType()));
2134 Ops.push_back(InFlag);
2135 Chain = DAG.getNode(X86ISD::FST, Tys, Ops);
2136 Result = DAG.getLoad(Op.getValueType(), Chain, StackSlot,
2137 DAG.getSrcValue(NULL));
2142 case ISD::FP_TO_SINT: {
2143 assert(Op.getValueType() <= MVT::i64 && Op.getValueType() >= MVT::i16 &&
2144 "Unknown FP_TO_SINT to lower!");
2145 // We lower FP->sint64 into FISTP64, followed by a load, all to a temporary
2147 MachineFunction &MF = DAG.getMachineFunction();
2148 unsigned MemSize = MVT::getSizeInBits(Op.getValueType())/8;
2149 int SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize);
2150 SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
2153 switch (Op.getValueType()) {
2154 default: assert(0 && "Invalid FP_TO_SINT to lower!");
2155 case MVT::i16: Opc = X86ISD::FP_TO_INT16_IN_MEM; break;
2156 case MVT::i32: Opc = X86ISD::FP_TO_INT32_IN_MEM; break;
2157 case MVT::i64: Opc = X86ISD::FP_TO_INT64_IN_MEM; break;
2160 SDOperand Chain = DAG.getEntryNode();
2161 SDOperand Value = Op.getOperand(0);
2163 assert(Op.getValueType() == MVT::i64 && "Invalid FP_TO_SINT to lower!");
2164 Chain = DAG.getNode(ISD::STORE, MVT::Other, Chain, Value, StackSlot,
2165 DAG.getSrcValue(0));
2166 std::vector<MVT::ValueType> Tys;
2167 Tys.push_back(MVT::f64);
2168 Tys.push_back(MVT::Other);
2169 std::vector<SDOperand> Ops;
2170 Ops.push_back(Chain);
2171 Ops.push_back(StackSlot);
2172 Ops.push_back(DAG.getValueType(Op.getOperand(0).getValueType()));
2173 Value = DAG.getNode(X86ISD::FLD, Tys, Ops);
2174 Chain = Value.getValue(1);
2175 SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize);
2176 StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
2179 // Build the FP_TO_INT*_IN_MEM
2180 std::vector<SDOperand> Ops;
2181 Ops.push_back(Chain);
2182 Ops.push_back(Value);
2183 Ops.push_back(StackSlot);
2184 SDOperand FIST = DAG.getNode(Opc, MVT::Other, Ops);
2187 return DAG.getLoad(Op.getValueType(), FIST, StackSlot,
2188 DAG.getSrcValue(NULL));
2190 case ISD::READCYCLECOUNTER: {
2191 std::vector<MVT::ValueType> Tys;
2192 Tys.push_back(MVT::Other);
2193 Tys.push_back(MVT::Flag);
2194 std::vector<SDOperand> Ops;
2195 Ops.push_back(Op.getOperand(0));
2196 SDOperand rd = DAG.getNode(X86ISD::RDTSC_DAG, Tys, Ops);
2198 Ops.push_back(DAG.getCopyFromReg(rd, X86::EAX, MVT::i32, rd.getValue(1)));
2199 Ops.push_back(DAG.getCopyFromReg(Ops[0].getValue(1), X86::EDX,
2200 MVT::i32, Ops[0].getValue(2)));
2201 Ops.push_back(Ops[1].getValue(1));
2202 Tys[0] = Tys[1] = MVT::i32;
2203 Tys.push_back(MVT::Other);
2204 return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops);
2207 MVT::ValueType VT = Op.getValueType();
2208 const Type *OpNTy = MVT::getTypeForValueType(VT);
2209 std::vector<Constant*> CV;
2210 if (VT == MVT::f64) {
2211 CV.push_back(ConstantFP::get(OpNTy, BitsToDouble(~(1ULL << 63))));
2212 CV.push_back(ConstantFP::get(OpNTy, 0.0));
2214 CV.push_back(ConstantFP::get(OpNTy, BitsToFloat(~(1U << 31))));
2215 CV.push_back(ConstantFP::get(OpNTy, 0.0));
2216 CV.push_back(ConstantFP::get(OpNTy, 0.0));
2217 CV.push_back(ConstantFP::get(OpNTy, 0.0));
2219 Constant *CS = ConstantStruct::get(CV);
2220 SDOperand CPIdx = DAG.getConstantPool(CS, getPointerTy(), 4);
2222 = DAG.getNode(X86ISD::LOAD_PACK,
2223 VT, DAG.getEntryNode(), CPIdx, DAG.getSrcValue(NULL));
2224 return DAG.getNode(X86ISD::FAND, VT, Op.getOperand(0), Mask);
2227 MVT::ValueType VT = Op.getValueType();
2228 const Type *OpNTy = MVT::getTypeForValueType(VT);
2229 std::vector<Constant*> CV;
2230 if (VT == MVT::f64) {
2231 CV.push_back(ConstantFP::get(OpNTy, BitsToDouble(1ULL << 63)));
2232 CV.push_back(ConstantFP::get(OpNTy, 0.0));
2234 CV.push_back(ConstantFP::get(OpNTy, BitsToFloat(1U << 31)));
2235 CV.push_back(ConstantFP::get(OpNTy, 0.0));
2236 CV.push_back(ConstantFP::get(OpNTy, 0.0));
2237 CV.push_back(ConstantFP::get(OpNTy, 0.0));
2239 Constant *CS = ConstantStruct::get(CV);
2240 SDOperand CPIdx = DAG.getConstantPool(CS, getPointerTy(), 4);
2242 = DAG.getNode(X86ISD::LOAD_PACK,
2243 VT, DAG.getEntryNode(), CPIdx, DAG.getSrcValue(NULL));
2244 return DAG.getNode(X86ISD::FXOR, VT, Op.getOperand(0), Mask);
2247 assert(Op.getValueType() == MVT::i8 && "SetCC type must be 8-bit integer");
2249 SDOperand CC = Op.getOperand(2);
2250 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
2251 bool isFP = MVT::isFloatingPoint(Op.getOperand(1).getValueType());
2254 if (translateX86CC(CC, isFP, X86CC, Flip)) {
2256 Cond = DAG.getNode(X86ISD::CMP, MVT::Flag,
2257 Op.getOperand(1), Op.getOperand(0));
2259 Cond = DAG.getNode(X86ISD::CMP, MVT::Flag,
2260 Op.getOperand(0), Op.getOperand(1));
2261 return DAG.getNode(X86ISD::SETCC, MVT::i8,
2262 DAG.getConstant(X86CC, MVT::i8), Cond);
2264 assert(isFP && "Illegal integer SetCC!");
2266 Cond = DAG.getNode(X86ISD::CMP, MVT::Flag,
2267 Op.getOperand(0), Op.getOperand(1));
2268 std::vector<MVT::ValueType> Tys;
2269 std::vector<SDOperand> Ops;
2270 switch (SetCCOpcode) {
2271 default: assert(false && "Illegal floating point SetCC!");
2272 case ISD::SETOEQ: { // !PF & ZF
2273 Tys.push_back(MVT::i8);
2274 Tys.push_back(MVT::Flag);
2275 Ops.push_back(DAG.getConstant(X86ISD::COND_NP, MVT::i8));
2276 Ops.push_back(Cond);
2277 SDOperand Tmp1 = DAG.getNode(X86ISD::SETCC, Tys, Ops);
2278 SDOperand Tmp2 = DAG.getNode(X86ISD::SETCC, MVT::i8,
2279 DAG.getConstant(X86ISD::COND_E, MVT::i8),
2281 return DAG.getNode(ISD::AND, MVT::i8, Tmp1, Tmp2);
2283 case ISD::SETUNE: { // PF | !ZF
2284 Tys.push_back(MVT::i8);
2285 Tys.push_back(MVT::Flag);
2286 Ops.push_back(DAG.getConstant(X86ISD::COND_P, MVT::i8));
2287 Ops.push_back(Cond);
2288 SDOperand Tmp1 = DAG.getNode(X86ISD::SETCC, Tys, Ops);
2289 SDOperand Tmp2 = DAG.getNode(X86ISD::SETCC, MVT::i8,
2290 DAG.getConstant(X86ISD::COND_NE, MVT::i8),
2292 return DAG.getNode(ISD::OR, MVT::i8, Tmp1, Tmp2);
2298 MVT::ValueType VT = Op.getValueType();
2299 bool isFPStack = MVT::isFloatingPoint(VT) && !X86ScalarSSE;
2300 bool addTest = false;
2301 SDOperand Op0 = Op.getOperand(0);
2303 if (Op0.getOpcode() == ISD::SETCC)
2304 Op0 = LowerOperation(Op0, DAG);
2306 if (Op0.getOpcode() == X86ISD::SETCC) {
2307 // If condition flag is set by a X86ISD::CMP, then make a copy of it
2308 // (since flag operand cannot be shared). If the X86ISD::SETCC does not
2309 // have another use it will be eliminated.
2310 // If the X86ISD::SETCC has more than one use, then it's probably better
2311 // to use a test instead of duplicating the X86ISD::CMP (for register
2312 // pressure reason).
2313 unsigned CmpOpc = Op0.getOperand(1).getOpcode();
2314 if (CmpOpc == X86ISD::CMP || CmpOpc == X86ISD::COMI ||
2315 CmpOpc == X86ISD::UCOMI) {
2316 if (!Op0.hasOneUse()) {
2317 std::vector<MVT::ValueType> Tys;
2318 for (unsigned i = 0; i < Op0.Val->getNumValues(); ++i)
2319 Tys.push_back(Op0.Val->getValueType(i));
2320 std::vector<SDOperand> Ops;
2321 for (unsigned i = 0; i < Op0.getNumOperands(); ++i)
2322 Ops.push_back(Op0.getOperand(i));
2323 Op0 = DAG.getNode(X86ISD::SETCC, Tys, Ops);
2326 CC = Op0.getOperand(0);
2327 Cond = Op0.getOperand(1);
2328 // Make a copy as flag result cannot be used by more than one.
2329 Cond = DAG.getNode(CmpOpc, MVT::Flag,
2330 Cond.getOperand(0), Cond.getOperand(1));
2332 isFPStack && !hasFPCMov(cast<ConstantSDNode>(CC)->getSignExtended());
2339 CC = DAG.getConstant(X86ISD::COND_NE, MVT::i8);
2340 Cond = DAG.getNode(X86ISD::TEST, MVT::Flag, Op0, Op0);
2343 std::vector<MVT::ValueType> Tys;
2344 Tys.push_back(Op.getValueType());
2345 Tys.push_back(MVT::Flag);
2346 std::vector<SDOperand> Ops;
2347 // X86ISD::CMOV means set the result (which is operand 1) to the RHS if
2348 // condition is true.
2349 Ops.push_back(Op.getOperand(2));
2350 Ops.push_back(Op.getOperand(1));
2352 Ops.push_back(Cond);
2353 return DAG.getNode(X86ISD::CMOV, Tys, Ops);
2356 bool addTest = false;
2357 SDOperand Cond = Op.getOperand(1);
2358 SDOperand Dest = Op.getOperand(2);
2360 if (Cond.getOpcode() == ISD::SETCC)
2361 Cond = LowerOperation(Cond, DAG);
2363 if (Cond.getOpcode() == X86ISD::SETCC) {
2364 // If condition flag is set by a X86ISD::CMP, then make a copy of it
2365 // (since flag operand cannot be shared). If the X86ISD::SETCC does not
2366 // have another use it will be eliminated.
2367 // If the X86ISD::SETCC has more than one use, then it's probably better
2368 // to use a test instead of duplicating the X86ISD::CMP (for register
2369 // pressure reason).
2370 unsigned CmpOpc = Cond.getOperand(1).getOpcode();
2371 if (CmpOpc == X86ISD::CMP || CmpOpc == X86ISD::COMI ||
2372 CmpOpc == X86ISD::UCOMI) {
2373 if (!Cond.hasOneUse()) {
2374 std::vector<MVT::ValueType> Tys;
2375 for (unsigned i = 0; i < Cond.Val->getNumValues(); ++i)
2376 Tys.push_back(Cond.Val->getValueType(i));
2377 std::vector<SDOperand> Ops;
2378 for (unsigned i = 0; i < Cond.getNumOperands(); ++i)
2379 Ops.push_back(Cond.getOperand(i));
2380 Cond = DAG.getNode(X86ISD::SETCC, Tys, Ops);
2383 CC = Cond.getOperand(0);
2384 Cond = Cond.getOperand(1);
2385 // Make a copy as flag result cannot be used by more than one.
2386 Cond = DAG.getNode(CmpOpc, MVT::Flag,
2387 Cond.getOperand(0), Cond.getOperand(1));
2394 CC = DAG.getConstant(X86ISD::COND_NE, MVT::i8);
2395 Cond = DAG.getNode(X86ISD::TEST, MVT::Flag, Cond, Cond);
2397 return DAG.getNode(X86ISD::BRCOND, Op.getValueType(),
2398 Op.getOperand(0), Op.getOperand(2), CC, Cond);
2401 SDOperand InFlag(0, 0);
2402 SDOperand Chain = Op.getOperand(0);
2404 (unsigned)cast<ConstantSDNode>(Op.getOperand(4))->getValue();
2405 if (Align == 0) Align = 1;
2407 ConstantSDNode *I = dyn_cast<ConstantSDNode>(Op.getOperand(3));
2408 // If not DWORD aligned, call memset if size is less than the threshold.
2409 // It knows how to align to the right boundary first.
2410 if ((Align & 3) != 0 ||
2411 (I && I->getValue() < Subtarget->getMinRepStrSizeThreshold())) {
2412 MVT::ValueType IntPtr = getPointerTy();
2413 const Type *IntPtrTy = getTargetData().getIntPtrType();
2414 std::vector<std::pair<SDOperand, const Type*> > Args;
2415 Args.push_back(std::make_pair(Op.getOperand(1), IntPtrTy));
2416 // Extend the ubyte argument to be an int value for the call.
2417 SDOperand Val = DAG.getNode(ISD::ZERO_EXTEND, MVT::i32, Op.getOperand(2));
2418 Args.push_back(std::make_pair(Val, IntPtrTy));
2419 Args.push_back(std::make_pair(Op.getOperand(3), IntPtrTy));
2420 std::pair<SDOperand,SDOperand> CallResult =
2421 LowerCallTo(Chain, Type::VoidTy, false, CallingConv::C, false,
2422 DAG.getExternalSymbol("memset", IntPtr), Args, DAG);
2423 return CallResult.second;
2428 ConstantSDNode *ValC = dyn_cast<ConstantSDNode>(Op.getOperand(2));
2429 unsigned BytesLeft = 0;
2430 bool TwoRepStos = false;
2433 unsigned Val = ValC->getValue() & 255;
2435 // If the value is a constant, then we can potentially use larger sets.
2436 switch (Align & 3) {
2437 case 2: // WORD aligned
2439 Count = DAG.getConstant(I->getValue() / 2, MVT::i32);
2440 BytesLeft = I->getValue() % 2;
2441 Val = (Val << 8) | Val;
2444 case 0: // DWORD aligned
2447 Count = DAG.getConstant(I->getValue() / 4, MVT::i32);
2448 BytesLeft = I->getValue() % 4;
2450 Count = DAG.getNode(ISD::SRL, MVT::i32, Op.getOperand(3),
2451 DAG.getConstant(2, MVT::i8));
2454 Val = (Val << 8) | Val;
2455 Val = (Val << 16) | Val;
2458 default: // Byte aligned
2460 Count = Op.getOperand(3);
2465 Chain = DAG.getCopyToReg(Chain, ValReg, DAG.getConstant(Val, AVT),
2467 InFlag = Chain.getValue(1);
2470 Count = Op.getOperand(3);
2471 Chain = DAG.getCopyToReg(Chain, X86::AL, Op.getOperand(2), InFlag);
2472 InFlag = Chain.getValue(1);
2475 Chain = DAG.getCopyToReg(Chain, X86::ECX, Count, InFlag);
2476 InFlag = Chain.getValue(1);
2477 Chain = DAG.getCopyToReg(Chain, X86::EDI, Op.getOperand(1), InFlag);
2478 InFlag = Chain.getValue(1);
2480 std::vector<MVT::ValueType> Tys;
2481 Tys.push_back(MVT::Other);
2482 Tys.push_back(MVT::Flag);
2483 std::vector<SDOperand> Ops;
2484 Ops.push_back(Chain);
2485 Ops.push_back(DAG.getValueType(AVT));
2486 Ops.push_back(InFlag);
2487 Chain = DAG.getNode(X86ISD::REP_STOS, Tys, Ops);
2490 InFlag = Chain.getValue(1);
2491 Count = Op.getOperand(3);
2492 MVT::ValueType CVT = Count.getValueType();
2493 SDOperand Left = DAG.getNode(ISD::AND, CVT, Count,
2494 DAG.getConstant(3, CVT));
2495 Chain = DAG.getCopyToReg(Chain, X86::ECX, Left, InFlag);
2496 InFlag = Chain.getValue(1);
2498 Tys.push_back(MVT::Other);
2499 Tys.push_back(MVT::Flag);
2501 Ops.push_back(Chain);
2502 Ops.push_back(DAG.getValueType(MVT::i8));
2503 Ops.push_back(InFlag);
2504 Chain = DAG.getNode(X86ISD::REP_STOS, Tys, Ops);
2505 } else if (BytesLeft) {
2506 // Issue stores for the last 1 - 3 bytes.
2508 unsigned Val = ValC->getValue() & 255;
2509 unsigned Offset = I->getValue() - BytesLeft;
2510 SDOperand DstAddr = Op.getOperand(1);
2511 MVT::ValueType AddrVT = DstAddr.getValueType();
2512 if (BytesLeft >= 2) {
2513 Value = DAG.getConstant((Val << 8) | Val, MVT::i16);
2514 Chain = DAG.getNode(ISD::STORE, MVT::Other, Chain, Value,
2515 DAG.getNode(ISD::ADD, AddrVT, DstAddr,
2516 DAG.getConstant(Offset, AddrVT)),
2517 DAG.getSrcValue(NULL));
2522 if (BytesLeft == 1) {
2523 Value = DAG.getConstant(Val, MVT::i8);
2524 Chain = DAG.getNode(ISD::STORE, MVT::Other, Chain, Value,
2525 DAG.getNode(ISD::ADD, AddrVT, DstAddr,
2526 DAG.getConstant(Offset, AddrVT)),
2527 DAG.getSrcValue(NULL));
2534 SDOperand Chain = Op.getOperand(0);
2536 (unsigned)cast<ConstantSDNode>(Op.getOperand(4))->getValue();
2537 if (Align == 0) Align = 1;
2539 ConstantSDNode *I = dyn_cast<ConstantSDNode>(Op.getOperand(3));
2540 // If not DWORD aligned, call memcpy if size is less than the threshold.
2541 // It knows how to align to the right boundary first.
2542 if ((Align & 3) != 0 ||
2543 (I && I->getValue() < Subtarget->getMinRepStrSizeThreshold())) {
2544 MVT::ValueType IntPtr = getPointerTy();
2545 const Type *IntPtrTy = getTargetData().getIntPtrType();
2546 std::vector<std::pair<SDOperand, const Type*> > Args;
2547 Args.push_back(std::make_pair(Op.getOperand(1), IntPtrTy));
2548 Args.push_back(std::make_pair(Op.getOperand(2), IntPtrTy));
2549 Args.push_back(std::make_pair(Op.getOperand(3), IntPtrTy));
2550 std::pair<SDOperand,SDOperand> CallResult =
2551 LowerCallTo(Chain, Type::VoidTy, false, CallingConv::C, false,
2552 DAG.getExternalSymbol("memcpy", IntPtr), Args, DAG);
2553 return CallResult.second;
2558 unsigned BytesLeft = 0;
2559 bool TwoRepMovs = false;
2560 switch (Align & 3) {
2561 case 2: // WORD aligned
2563 Count = DAG.getConstant(I->getValue() / 2, MVT::i32);
2564 BytesLeft = I->getValue() % 2;
2566 case 0: // DWORD aligned
2569 Count = DAG.getConstant(I->getValue() / 4, MVT::i32);
2570 BytesLeft = I->getValue() % 4;
2572 Count = DAG.getNode(ISD::SRL, MVT::i32, Op.getOperand(3),
2573 DAG.getConstant(2, MVT::i8));
2577 default: // Byte aligned
2579 Count = Op.getOperand(3);
2583 SDOperand InFlag(0, 0);
2584 Chain = DAG.getCopyToReg(Chain, X86::ECX, Count, InFlag);
2585 InFlag = Chain.getValue(1);
2586 Chain = DAG.getCopyToReg(Chain, X86::EDI, Op.getOperand(1), InFlag);
2587 InFlag = Chain.getValue(1);
2588 Chain = DAG.getCopyToReg(Chain, X86::ESI, Op.getOperand(2), InFlag);
2589 InFlag = Chain.getValue(1);
2591 std::vector<MVT::ValueType> Tys;
2592 Tys.push_back(MVT::Other);
2593 Tys.push_back(MVT::Flag);
2594 std::vector<SDOperand> Ops;
2595 Ops.push_back(Chain);
2596 Ops.push_back(DAG.getValueType(AVT));
2597 Ops.push_back(InFlag);
2598 Chain = DAG.getNode(X86ISD::REP_MOVS, Tys, Ops);
2601 InFlag = Chain.getValue(1);
2602 Count = Op.getOperand(3);
2603 MVT::ValueType CVT = Count.getValueType();
2604 SDOperand Left = DAG.getNode(ISD::AND, CVT, Count,
2605 DAG.getConstant(3, CVT));
2606 Chain = DAG.getCopyToReg(Chain, X86::ECX, Left, InFlag);
2607 InFlag = Chain.getValue(1);
2609 Tys.push_back(MVT::Other);
2610 Tys.push_back(MVT::Flag);
2612 Ops.push_back(Chain);
2613 Ops.push_back(DAG.getValueType(MVT::i8));
2614 Ops.push_back(InFlag);
2615 Chain = DAG.getNode(X86ISD::REP_MOVS, Tys, Ops);
2616 } else if (BytesLeft) {
2617 // Issue loads and stores for the last 1 - 3 bytes.
2618 unsigned Offset = I->getValue() - BytesLeft;
2619 SDOperand DstAddr = Op.getOperand(1);
2620 MVT::ValueType DstVT = DstAddr.getValueType();
2621 SDOperand SrcAddr = Op.getOperand(2);
2622 MVT::ValueType SrcVT = SrcAddr.getValueType();
2624 if (BytesLeft >= 2) {
2625 Value = DAG.getLoad(MVT::i16, Chain,
2626 DAG.getNode(ISD::ADD, SrcVT, SrcAddr,
2627 DAG.getConstant(Offset, SrcVT)),
2628 DAG.getSrcValue(NULL));
2629 Chain = Value.getValue(1);
2630 Chain = DAG.getNode(ISD::STORE, MVT::Other, Chain, Value,
2631 DAG.getNode(ISD::ADD, DstVT, DstAddr,
2632 DAG.getConstant(Offset, DstVT)),
2633 DAG.getSrcValue(NULL));
2638 if (BytesLeft == 1) {
2639 Value = DAG.getLoad(MVT::i8, Chain,
2640 DAG.getNode(ISD::ADD, SrcVT, SrcAddr,
2641 DAG.getConstant(Offset, SrcVT)),
2642 DAG.getSrcValue(NULL));
2643 Chain = Value.getValue(1);
2644 Chain = DAG.getNode(ISD::STORE, MVT::Other, Chain, Value,
2645 DAG.getNode(ISD::ADD, DstVT, DstAddr,
2646 DAG.getConstant(Offset, DstVT)),
2647 DAG.getSrcValue(NULL));
2654 // ConstantPool, GlobalAddress, and ExternalSymbol are lowered as their
2655 // target countpart wrapped in the X86ISD::Wrapper node. Suppose N is
2656 // one of the above mentioned nodes. It has to be wrapped because otherwise
2657 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
2658 // be used to form addressing mode. These wrapped nodes will be selected
2660 case ISD::ConstantPool: {
2661 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
2662 SDOperand Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(),
2663 DAG.getTargetConstantPool(CP->get(), getPointerTy(),
2664 CP->getAlignment()));
2665 if (Subtarget->isTargetDarwin()) {
2666 // With PIC, the address is actually $g + Offset.
2667 if (getTargetMachine().getRelocationModel() == Reloc::PIC)
2668 Result = DAG.getNode(ISD::ADD, getPointerTy(),
2669 DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()), Result);
2674 case ISD::GlobalAddress: {
2675 GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
2676 SDOperand Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(),
2677 DAG.getTargetGlobalAddress(GV, getPointerTy()));
2678 if (Subtarget->isTargetDarwin()) {
2679 // With PIC, the address is actually $g + Offset.
2680 if (getTargetMachine().getRelocationModel() == Reloc::PIC)
2681 Result = DAG.getNode(ISD::ADD, getPointerTy(),
2682 DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()), Result);
2684 // For Darwin, external and weak symbols are indirect, so we want to load
2685 // the value at address GV, not the value of GV itself. This means that
2686 // the GlobalAddress must be in the base or index register of the address,
2687 // not the GV offset field.
2688 if (getTargetMachine().getRelocationModel() != Reloc::Static &&
2689 DarwinGVRequiresExtraLoad(GV))
2690 Result = DAG.getLoad(MVT::i32, DAG.getEntryNode(),
2691 Result, DAG.getSrcValue(NULL));
2696 case ISD::ExternalSymbol: {
2697 const char *Sym = cast<ExternalSymbolSDNode>(Op)->getSymbol();
2698 SDOperand Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(),
2699 DAG.getTargetExternalSymbol(Sym, getPointerTy()));
2700 if (Subtarget->isTargetDarwin()) {
2701 // With PIC, the address is actually $g + Offset.
2702 if (getTargetMachine().getRelocationModel() == Reloc::PIC)
2703 Result = DAG.getNode(ISD::ADD, getPointerTy(),
2704 DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()), Result);
2709 case ISD::VASTART: {
2710 // vastart just stores the address of the VarArgsFrameIndex slot into the
2711 // memory location argument.
2712 // FIXME: Replace MVT::i32 with PointerTy
2713 SDOperand FR = DAG.getFrameIndex(VarArgsFrameIndex, MVT::i32);
2714 return DAG.getNode(ISD::STORE, MVT::Other, Op.getOperand(0), FR,
2715 Op.getOperand(1), Op.getOperand(2));
2720 switch(Op.getNumOperands()) {
2722 assert(0 && "Do not know how to return this many arguments!");
2724 case 1: // ret void.
2725 return DAG.getNode(X86ISD::RET_FLAG, MVT::Other, Op.getOperand(0),
2726 DAG.getConstant(getBytesToPopOnReturn(), MVT::i16));
2728 MVT::ValueType ArgVT = Op.getOperand(1).getValueType();
2730 if (MVT::isVector(ArgVT)) {
2731 // Integer or FP vector result -> XMM0.
2732 if (DAG.getMachineFunction().liveout_empty())
2733 DAG.getMachineFunction().addLiveOut(X86::XMM0);
2734 Copy = DAG.getCopyToReg(Op.getOperand(0), X86::XMM0, Op.getOperand(1),
2736 } else if (MVT::isInteger(ArgVT)) {
2737 // Integer result -> EAX
2738 if (DAG.getMachineFunction().liveout_empty())
2739 DAG.getMachineFunction().addLiveOut(X86::EAX);
2741 Copy = DAG.getCopyToReg(Op.getOperand(0), X86::EAX, Op.getOperand(1),
2743 } else if (!X86ScalarSSE) {
2744 // FP return with fp-stack value.
2745 if (DAG.getMachineFunction().liveout_empty())
2746 DAG.getMachineFunction().addLiveOut(X86::ST0);
2748 std::vector<MVT::ValueType> Tys;
2749 Tys.push_back(MVT::Other);
2750 Tys.push_back(MVT::Flag);
2751 std::vector<SDOperand> Ops;
2752 Ops.push_back(Op.getOperand(0));
2753 Ops.push_back(Op.getOperand(1));
2754 Copy = DAG.getNode(X86ISD::FP_SET_RESULT, Tys, Ops);
2756 // FP return with ScalarSSE (return on fp-stack).
2757 if (DAG.getMachineFunction().liveout_empty())
2758 DAG.getMachineFunction().addLiveOut(X86::ST0);
2761 SDOperand Chain = Op.getOperand(0);
2762 SDOperand Value = Op.getOperand(1);
2764 if (Value.getOpcode() == ISD::LOAD &&
2765 (Chain == Value.getValue(1) || Chain == Value.getOperand(0))) {
2766 Chain = Value.getOperand(0);
2767 MemLoc = Value.getOperand(1);
2769 // Spill the value to memory and reload it into top of stack.
2770 unsigned Size = MVT::getSizeInBits(ArgVT)/8;
2771 MachineFunction &MF = DAG.getMachineFunction();
2772 int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size);
2773 MemLoc = DAG.getFrameIndex(SSFI, getPointerTy());
2774 Chain = DAG.getNode(ISD::STORE, MVT::Other, Op.getOperand(0),
2775 Value, MemLoc, DAG.getSrcValue(0));
2777 std::vector<MVT::ValueType> Tys;
2778 Tys.push_back(MVT::f64);
2779 Tys.push_back(MVT::Other);
2780 std::vector<SDOperand> Ops;
2781 Ops.push_back(Chain);
2782 Ops.push_back(MemLoc);
2783 Ops.push_back(DAG.getValueType(ArgVT));
2784 Copy = DAG.getNode(X86ISD::FLD, Tys, Ops);
2786 Tys.push_back(MVT::Other);
2787 Tys.push_back(MVT::Flag);
2789 Ops.push_back(Copy.getValue(1));
2790 Ops.push_back(Copy);
2791 Copy = DAG.getNode(X86ISD::FP_SET_RESULT, Tys, Ops);
2796 if (DAG.getMachineFunction().liveout_empty()) {
2797 DAG.getMachineFunction().addLiveOut(X86::EAX);
2798 DAG.getMachineFunction().addLiveOut(X86::EDX);
2801 Copy = DAG.getCopyToReg(Op.getOperand(0), X86::EDX, Op.getOperand(2),
2803 Copy = DAG.getCopyToReg(Copy, X86::EAX,Op.getOperand(1),Copy.getValue(1));
2806 return DAG.getNode(X86ISD::RET_FLAG, MVT::Other,
2807 Copy, DAG.getConstant(getBytesToPopOnReturn(), MVT::i16),
2810 case ISD::SCALAR_TO_VECTOR: {
2811 SDOperand AnyExt = DAG.getNode(ISD::ANY_EXTEND, MVT::i32, Op.getOperand(0));
2812 return DAG.getNode(X86ISD::S2VEC, Op.getValueType(), AnyExt);
2814 case ISD::VECTOR_SHUFFLE: {
2815 SDOperand V1 = Op.getOperand(0);
2816 SDOperand V2 = Op.getOperand(1);
2817 SDOperand PermMask = Op.getOperand(2);
2818 MVT::ValueType VT = Op.getValueType();
2819 unsigned NumElems = PermMask.getNumOperands();
2821 if (isSplatMask(PermMask.Val)) {
2822 if (NumElems <= 4) return Op;
2823 // Promote it to a v4i32 splat.
2824 return PromoteSplat(Op, DAG);
2827 if (ShouldXformToMOVHLPS(PermMask.Val) ||
2828 ShouldXformToMOVLP(V1.Val, PermMask.Val))
2829 return CommuteVectorShuffle(Op, DAG);
2831 if (X86::isMOVSMask(PermMask.Val) ||
2832 X86::isMOVSHDUPMask(PermMask.Val) ||
2833 X86::isMOVSLDUPMask(PermMask.Val) ||
2834 X86::isMOVHLPSMask(PermMask.Val) ||
2835 X86::isMOVHPMask(PermMask.Val) ||
2836 X86::isMOVLPMask(PermMask.Val))
2839 if (X86::isUNPCKLMask(PermMask.Val) ||
2840 X86::isUNPCKL_v_undef_Mask(PermMask.Val) ||
2841 X86::isUNPCKHMask(PermMask.Val))
2842 // Leave the VECTOR_SHUFFLE alone. It matches {P}UNPCKL*.
2845 // Normalize the node to match x86 shuffle ops if needed
2846 if (V2.getOpcode() != ISD::UNDEF)
2847 if (isLowerFromV2UpperFromV1(PermMask)) {
2848 Op = CommuteVectorShuffle(Op, DAG);
2849 V1 = Op.getOperand(0);
2850 V2 = Op.getOperand(1);
2851 PermMask = Op.getOperand(2);
2854 // If VT is integer, try PSHUF* first, then SHUFP*.
2855 if (MVT::isInteger(VT)) {
2856 if (X86::isPSHUFDMask(PermMask.Val) ||
2857 X86::isPSHUFHWMask(PermMask.Val) ||
2858 X86::isPSHUFLWMask(PermMask.Val)) {
2859 if (V2.getOpcode() != ISD::UNDEF)
2860 return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1,
2861 DAG.getNode(ISD::UNDEF, V1.getValueType()),PermMask);
2865 if (X86::isSHUFPMask(PermMask.Val))
2868 // Handle v8i16 shuffle high / low shuffle node pair.
2869 if (VT == MVT::v8i16 && isPSHUFHW_PSHUFLWMask(PermMask.Val)) {
2870 MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
2871 MVT::ValueType BaseVT = MVT::getVectorBaseType(MaskVT);
2872 std::vector<SDOperand> MaskVec;
2873 for (unsigned i = 0; i != 4; ++i)
2874 MaskVec.push_back(PermMask.getOperand(i));
2875 for (unsigned i = 4; i != 8; ++i)
2876 MaskVec.push_back(DAG.getConstant(i, BaseVT));
2877 SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, MaskVec);
2878 V1 = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, Mask);
2880 for (unsigned i = 0; i != 4; ++i)
2881 MaskVec.push_back(DAG.getConstant(i, BaseVT));
2882 for (unsigned i = 4; i != 8; ++i)
2883 MaskVec.push_back(PermMask.getOperand(i));
2884 Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, MaskVec);
2885 return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, Mask);
2888 // Floating point cases in the other order.
2889 if (X86::isSHUFPMask(PermMask.Val))
2891 if (X86::isPSHUFDMask(PermMask.Val) ||
2892 X86::isPSHUFHWMask(PermMask.Val) ||
2893 X86::isPSHUFLWMask(PermMask.Val)) {
2894 if (V2.getOpcode() != ISD::UNDEF)
2895 return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1,
2896 DAG.getNode(ISD::UNDEF, V1.getValueType()),PermMask);
2901 if (NumElems == 4) {
2902 // Break it into (shuffle shuffle_hi, shuffle_lo).
2903 MVT::ValueType MaskVT = PermMask.getValueType();
2904 MVT::ValueType MaskEVT = MVT::getVectorBaseType(MaskVT);
2905 std::map<unsigned, std::pair<int, int> > Locs;
2906 std::vector<SDOperand> LoMask(NumElems, DAG.getNode(ISD::UNDEF, MaskEVT));
2907 std::vector<SDOperand> HiMask(NumElems, DAG.getNode(ISD::UNDEF, MaskEVT));
2908 std::vector<SDOperand> *MaskPtr = &LoMask;
2909 unsigned MaskIdx = 0;
2911 unsigned HiIdx = NumElems/2;
2912 for (unsigned i = 0; i != NumElems; ++i) {
2913 if (i == NumElems/2) {
2919 SDOperand Elt = PermMask.getOperand(i);
2920 if (Elt.getOpcode() == ISD::UNDEF) {
2921 Locs[i] = std::make_pair(-1, -1);
2922 } else if (cast<ConstantSDNode>(Elt)->getValue() < NumElems) {
2923 Locs[i] = std::make_pair(MaskIdx, LoIdx);
2924 (*MaskPtr)[LoIdx] = Elt;
2927 Locs[i] = std::make_pair(MaskIdx, HiIdx);
2928 (*MaskPtr)[HiIdx] = Elt;
2933 SDOperand LoShuffle = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2,
2934 DAG.getNode(ISD::BUILD_VECTOR, MaskVT, LoMask));
2935 SDOperand HiShuffle = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2,
2936 DAG.getNode(ISD::BUILD_VECTOR, MaskVT, HiMask));
2937 std::vector<SDOperand> MaskOps;
2938 for (unsigned i = 0; i != NumElems; ++i) {
2939 if (Locs[i].first == -1) {
2940 MaskOps.push_back(DAG.getNode(ISD::UNDEF, MaskEVT));
2942 unsigned Idx = Locs[i].first * NumElems + Locs[i].second;
2943 MaskOps.push_back(DAG.getConstant(Idx, MaskEVT));
2946 return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, LoShuffle, HiShuffle,
2947 DAG.getNode(ISD::BUILD_VECTOR, MaskVT, MaskOps));
2952 case ISD::BUILD_VECTOR: {
2953 // All one's are handled with pcmpeqd.
2954 if (ISD::isBuildVectorAllOnes(Op.Val))
2957 std::set<SDOperand> Values;
2958 SDOperand Elt0 = Op.getOperand(0);
2959 Values.insert(Elt0);
2960 bool Elt0IsZero = (isa<ConstantSDNode>(Elt0) &&
2961 cast<ConstantSDNode>(Elt0)->getValue() == 0) ||
2962 (isa<ConstantFPSDNode>(Elt0) &&
2963 cast<ConstantFPSDNode>(Elt0)->isExactlyValue(0.0));
2964 bool RestAreZero = true;
2965 unsigned NumElems = Op.getNumOperands();
2966 for (unsigned i = 1; i < NumElems; ++i) {
2967 SDOperand Elt = Op.getOperand(i);
2968 if (ConstantFPSDNode *FPC = dyn_cast<ConstantFPSDNode>(Elt)) {
2969 if (!FPC->isExactlyValue(+0.0))
2970 RestAreZero = false;
2971 } else if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Elt)) {
2972 if (!C->isNullValue())
2973 RestAreZero = false;
2975 RestAreZero = false;
2980 if (Elt0IsZero) return Op;
2982 // Zero extend a scalar to a vector.
2983 if (Elt0.getValueType() != MVT::i64)
2984 return DAG.getNode(X86ISD::ZEXT_S2VEC, Op.getValueType(), Elt0);
2986 // See if we can turn it into a f64 op.
2987 bool IsLegal = false;
2988 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Elt0)) {
2989 Elt0 = DAG.getConstantFP(BitsToDouble(C->getValue()), MVT::f64);
2991 } else if (Elt0.getOpcode() == ISD::LOAD) {
2992 Elt0 = DAG.getLoad(MVT::f64, Elt0.getOperand(0), Elt0.getOperand(1),
2993 Elt0.getOperand(2));
2997 return DAG.getNode(ISD::BIT_CONVERT, MVT::v2i64,
2998 DAG.getNode(X86ISD::ZEXT_S2VEC, MVT::v2f64, Elt0));
3001 if (Values.size() > 2) {
3002 // Expand into a number of unpckl*.
3004 // Step 1: unpcklps 0, 2 ==> X: <?, ?, 2, 0>
3005 // : unpcklps 1, 3 ==> Y: <?, ?, 3, 1>
3006 // Step 2: unpcklps X, Y ==> <3, 2, 1, 0>
3007 MVT::ValueType VT = Op.getValueType();
3008 SDOperand PermMask = getUnpacklMask(NumElems, DAG);
3009 std::vector<SDOperand> V(NumElems);
3010 for (unsigned i = 0; i < NumElems; ++i)
3011 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, VT, Op.getOperand(i));
3013 while (NumElems != 0) {
3014 for (unsigned i = 0; i < NumElems; ++i)
3015 V[i] = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V[i], V[i + NumElems],
3024 case ISD::EXTRACT_VECTOR_ELT: {
3025 if (!isa<ConstantSDNode>(Op.getOperand(1)))
3028 MVT::ValueType VT = Op.getValueType();
3029 // TODO: handle v16i8.
3030 if (MVT::getSizeInBits(VT) == 16) {
3031 // Transform it so it match pextrw which produces a 32-bit result.
3032 MVT::ValueType EVT = (MVT::ValueType)(VT+1);
3033 SDOperand Extract = DAG.getNode(X86ISD::PEXTRW, EVT,
3034 Op.getOperand(0), Op.getOperand(1));
3035 SDOperand Assert = DAG.getNode(ISD::AssertZext, EVT, Extract,
3036 DAG.getValueType(VT));
3037 return DAG.getNode(ISD::TRUNCATE, VT, Assert);
3038 } else if (MVT::getSizeInBits(VT) == 32) {
3039 SDOperand Vec = Op.getOperand(0);
3040 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getValue();
3044 // TODO: if Idex == 2, we can use unpckhps
3045 // SHUFPS the element to the lowest double word, then movss.
3046 MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(4);
3047 SDOperand IdxNode = DAG.getConstant((Idx < 2) ? Idx : Idx+4,
3048 MVT::getVectorBaseType(MaskVT));
3049 std::vector<SDOperand> IdxVec;
3050 IdxVec.push_back(DAG.getConstant(Idx, MVT::getVectorBaseType(MaskVT)));
3051 IdxVec.push_back(DAG.getNode(ISD::UNDEF, MVT::getVectorBaseType(MaskVT)));
3052 IdxVec.push_back(DAG.getNode(ISD::UNDEF, MVT::getVectorBaseType(MaskVT)));
3053 IdxVec.push_back(DAG.getNode(ISD::UNDEF, MVT::getVectorBaseType(MaskVT)));
3054 SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, IdxVec);
3055 Vec = DAG.getNode(ISD::VECTOR_SHUFFLE, Vec.getValueType(),
3057 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, VT, Vec,
3058 DAG.getConstant(0, MVT::i32));
3059 } else if (MVT::getSizeInBits(VT) == 64) {
3060 SDOperand Vec = Op.getOperand(0);
3061 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getValue();
3065 // UNPCKHPD the element to the lowest double word, then movsd.
3066 // Note if the lower 64 bits of the result of the UNPCKHPD is then stored
3067 // to a f64mem, the whole operation is folded into a single MOVHPDmr.
3068 MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(4);
3069 std::vector<SDOperand> IdxVec;
3070 IdxVec.push_back(DAG.getConstant(1, MVT::getVectorBaseType(MaskVT)));
3071 IdxVec.push_back(DAG.getNode(ISD::UNDEF, MVT::getVectorBaseType(MaskVT)));
3072 SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, IdxVec);
3073 Vec = DAG.getNode(ISD::VECTOR_SHUFFLE, Vec.getValueType(),
3074 Vec, DAG.getNode(ISD::UNDEF, Vec.getValueType()), Mask);
3075 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, VT, Vec,
3076 DAG.getConstant(0, MVT::i32));
3081 case ISD::INSERT_VECTOR_ELT: {
3082 // Transform it so it match pinsrw which expects a 16-bit value in a R32
3083 // as its second argument.
3084 MVT::ValueType VT = Op.getValueType();
3085 MVT::ValueType BaseVT = MVT::getVectorBaseType(VT);
3086 SDOperand N0 = Op.getOperand(0);
3087 SDOperand N1 = Op.getOperand(1);
3088 SDOperand N2 = Op.getOperand(2);
3089 if (MVT::getSizeInBits(BaseVT) == 16) {
3090 if (N1.getValueType() != MVT::i32)
3091 N1 = DAG.getNode(ISD::ANY_EXTEND, MVT::i32, N1);
3092 if (N2.getValueType() != MVT::i32)
3093 N2 = DAG.getConstant(cast<ConstantSDNode>(N2)->getValue(), MVT::i32);
3094 return DAG.getNode(X86ISD::PINSRW, VT, N0, N1, N2);
3095 } else if (MVT::getSizeInBits(BaseVT) == 32) {
3096 unsigned Idx = cast<ConstantSDNode>(N2)->getValue();
3099 N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, VT, N1);
3100 MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(4);
3101 MVT::ValueType BaseVT = MVT::getVectorBaseType(MaskVT);
3102 std::vector<SDOperand> MaskVec;
3103 MaskVec.push_back(DAG.getConstant(4, BaseVT));
3104 for (unsigned i = 1; i <= 3; ++i)
3105 MaskVec.push_back(DAG.getConstant(i, BaseVT));
3106 return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, N0, N1,
3107 DAG.getNode(ISD::BUILD_VECTOR, MaskVT, MaskVec));
3109 // Use two pinsrw instructions to insert a 32 bit value.
3111 if (MVT::isFloatingPoint(N1.getValueType())) {
3112 if (N1.getOpcode() == ISD::LOAD) {
3113 // Just load directly from f32mem to R32.
3114 N1 = DAG.getLoad(MVT::i32, N1.getOperand(0), N1.getOperand(1),
3117 N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, MVT::v4f32, N1);
3118 N1 = DAG.getNode(ISD::BIT_CONVERT, MVT::v4i32, N1);
3119 N1 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, MVT::i32, N1,
3120 DAG.getConstant(0, MVT::i32));
3123 N0 = DAG.getNode(ISD::BIT_CONVERT, MVT::v8i16, N0);
3124 N0 = DAG.getNode(X86ISD::PINSRW, MVT::v8i16, N0, N1,
3125 DAG.getConstant(Idx, MVT::i32));
3126 N1 = DAG.getNode(ISD::SRL, MVT::i32, N1, DAG.getConstant(16, MVT::i8));
3127 N0 = DAG.getNode(X86ISD::PINSRW, MVT::v8i16, N0, N1,
3128 DAG.getConstant(Idx+1, MVT::i32));
3129 return DAG.getNode(ISD::BIT_CONVERT, VT, N0);
3135 case ISD::INTRINSIC_WO_CHAIN: {
3136 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getValue();
3138 default: return SDOperand(); // Don't custom lower most intrinsics.
3139 // Comparison intrinsics.
3140 case Intrinsic::x86_sse_comieq_ss:
3141 case Intrinsic::x86_sse_comilt_ss:
3142 case Intrinsic::x86_sse_comile_ss:
3143 case Intrinsic::x86_sse_comigt_ss:
3144 case Intrinsic::x86_sse_comige_ss:
3145 case Intrinsic::x86_sse_comineq_ss:
3146 case Intrinsic::x86_sse_ucomieq_ss:
3147 case Intrinsic::x86_sse_ucomilt_ss:
3148 case Intrinsic::x86_sse_ucomile_ss:
3149 case Intrinsic::x86_sse_ucomigt_ss:
3150 case Intrinsic::x86_sse_ucomige_ss:
3151 case Intrinsic::x86_sse_ucomineq_ss:
3152 case Intrinsic::x86_sse2_comieq_sd:
3153 case Intrinsic::x86_sse2_comilt_sd:
3154 case Intrinsic::x86_sse2_comile_sd:
3155 case Intrinsic::x86_sse2_comigt_sd:
3156 case Intrinsic::x86_sse2_comige_sd:
3157 case Intrinsic::x86_sse2_comineq_sd:
3158 case Intrinsic::x86_sse2_ucomieq_sd:
3159 case Intrinsic::x86_sse2_ucomilt_sd:
3160 case Intrinsic::x86_sse2_ucomile_sd:
3161 case Intrinsic::x86_sse2_ucomigt_sd:
3162 case Intrinsic::x86_sse2_ucomige_sd:
3163 case Intrinsic::x86_sse2_ucomineq_sd: {
3165 ISD::CondCode CC = ISD::SETCC_INVALID;
3168 case Intrinsic::x86_sse_comieq_ss:
3169 case Intrinsic::x86_sse2_comieq_sd:
3173 case Intrinsic::x86_sse_comilt_ss:
3174 case Intrinsic::x86_sse2_comilt_sd:
3178 case Intrinsic::x86_sse_comile_ss:
3179 case Intrinsic::x86_sse2_comile_sd:
3183 case Intrinsic::x86_sse_comigt_ss:
3184 case Intrinsic::x86_sse2_comigt_sd:
3188 case Intrinsic::x86_sse_comige_ss:
3189 case Intrinsic::x86_sse2_comige_sd:
3193 case Intrinsic::x86_sse_comineq_ss:
3194 case Intrinsic::x86_sse2_comineq_sd:
3198 case Intrinsic::x86_sse_ucomieq_ss:
3199 case Intrinsic::x86_sse2_ucomieq_sd:
3200 Opc = X86ISD::UCOMI;
3203 case Intrinsic::x86_sse_ucomilt_ss:
3204 case Intrinsic::x86_sse2_ucomilt_sd:
3205 Opc = X86ISD::UCOMI;
3208 case Intrinsic::x86_sse_ucomile_ss:
3209 case Intrinsic::x86_sse2_ucomile_sd:
3210 Opc = X86ISD::UCOMI;
3213 case Intrinsic::x86_sse_ucomigt_ss:
3214 case Intrinsic::x86_sse2_ucomigt_sd:
3215 Opc = X86ISD::UCOMI;
3218 case Intrinsic::x86_sse_ucomige_ss:
3219 case Intrinsic::x86_sse2_ucomige_sd:
3220 Opc = X86ISD::UCOMI;
3223 case Intrinsic::x86_sse_ucomineq_ss:
3224 case Intrinsic::x86_sse2_ucomineq_sd:
3225 Opc = X86ISD::UCOMI;
3231 translateX86CC(CC, true, X86CC, Flip);
3232 SDOperand Cond = DAG.getNode(Opc, MVT::Flag, Op.getOperand(Flip?2:1),
3233 Op.getOperand(Flip?1:2));
3234 SDOperand SetCC = DAG.getNode(X86ISD::SETCC, MVT::i8,
3235 DAG.getConstant(X86CC, MVT::i8), Cond);
3236 return DAG.getNode(ISD::ANY_EXTEND, MVT::i32, SetCC);
3243 const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const {
3245 default: return NULL;
3246 case X86ISD::SHLD: return "X86ISD::SHLD";
3247 case X86ISD::SHRD: return "X86ISD::SHRD";
3248 case X86ISD::FAND: return "X86ISD::FAND";
3249 case X86ISD::FXOR: return "X86ISD::FXOR";
3250 case X86ISD::FILD: return "X86ISD::FILD";
3251 case X86ISD::FILD_FLAG: return "X86ISD::FILD_FLAG";
3252 case X86ISD::FP_TO_INT16_IN_MEM: return "X86ISD::FP_TO_INT16_IN_MEM";
3253 case X86ISD::FP_TO_INT32_IN_MEM: return "X86ISD::FP_TO_INT32_IN_MEM";
3254 case X86ISD::FP_TO_INT64_IN_MEM: return "X86ISD::FP_TO_INT64_IN_MEM";
3255 case X86ISD::FLD: return "X86ISD::FLD";
3256 case X86ISD::FST: return "X86ISD::FST";
3257 case X86ISD::FP_GET_RESULT: return "X86ISD::FP_GET_RESULT";
3258 case X86ISD::FP_SET_RESULT: return "X86ISD::FP_SET_RESULT";
3259 case X86ISD::CALL: return "X86ISD::CALL";
3260 case X86ISD::TAILCALL: return "X86ISD::TAILCALL";
3261 case X86ISD::RDTSC_DAG: return "X86ISD::RDTSC_DAG";
3262 case X86ISD::CMP: return "X86ISD::CMP";
3263 case X86ISD::TEST: return "X86ISD::TEST";
3264 case X86ISD::COMI: return "X86ISD::COMI";
3265 case X86ISD::UCOMI: return "X86ISD::UCOMI";
3266 case X86ISD::SETCC: return "X86ISD::SETCC";
3267 case X86ISD::CMOV: return "X86ISD::CMOV";
3268 case X86ISD::BRCOND: return "X86ISD::BRCOND";
3269 case X86ISD::RET_FLAG: return "X86ISD::RET_FLAG";
3270 case X86ISD::REP_STOS: return "X86ISD::REP_STOS";
3271 case X86ISD::REP_MOVS: return "X86ISD::REP_MOVS";
3272 case X86ISD::LOAD_PACK: return "X86ISD::LOAD_PACK";
3273 case X86ISD::GlobalBaseReg: return "X86ISD::GlobalBaseReg";
3274 case X86ISD::Wrapper: return "X86ISD::Wrapper";
3275 case X86ISD::S2VEC: return "X86ISD::S2VEC";
3276 case X86ISD::ZEXT_S2VEC: return "X86ISD::ZEXT_S2VEC";
3277 case X86ISD::PEXTRW: return "X86ISD::PEXTRW";
3278 case X86ISD::PINSRW: return "X86ISD::PINSRW";
3282 void X86TargetLowering::computeMaskedBitsForTargetNode(const SDOperand Op,
3284 uint64_t &KnownZero,
3286 unsigned Depth) const {
3287 unsigned Opc = Op.getOpcode();
3288 assert((Opc >= ISD::BUILTIN_OP_END ||
3289 Opc == ISD::INTRINSIC_WO_CHAIN ||
3290 Opc == ISD::INTRINSIC_W_CHAIN ||
3291 Opc == ISD::INTRINSIC_VOID) &&
3292 "Should use MaskedValueIsZero if you don't know whether Op"
3293 " is a target node!");
3295 KnownZero = KnownOne = 0; // Don't know anything.
3299 KnownZero |= (MVT::getIntVTBitMask(Op.getValueType()) ^ 1ULL);
3304 std::vector<unsigned> X86TargetLowering::
3305 getRegClassForInlineAsmConstraint(const std::string &Constraint,
3306 MVT::ValueType VT) const {
3307 if (Constraint.size() == 1) {
3308 // FIXME: not handling fp-stack yet!
3309 // FIXME: not handling MMX registers yet ('y' constraint).
3310 switch (Constraint[0]) { // GCC X86 Constraint Letters
3311 default: break; // Unknown constriant letter
3312 case 'r': // GENERAL_REGS
3313 case 'R': // LEGACY_REGS
3314 return make_vector<unsigned>(X86::EAX, X86::EBX, X86::ECX, X86::EDX,
3315 X86::ESI, X86::EDI, X86::EBP, X86::ESP, 0);
3316 case 'l': // INDEX_REGS
3317 return make_vector<unsigned>(X86::EAX, X86::EBX, X86::ECX, X86::EDX,
3318 X86::ESI, X86::EDI, X86::EBP, 0);
3319 case 'q': // Q_REGS (GENERAL_REGS in 64-bit mode)
3321 return make_vector<unsigned>(X86::EAX, X86::EBX, X86::ECX, X86::EDX, 0);
3322 case 'x': // SSE_REGS if SSE1 allowed
3323 if (Subtarget->hasSSE1())
3324 return make_vector<unsigned>(X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
3325 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7,
3327 return std::vector<unsigned>();
3328 case 'Y': // SSE_REGS if SSE2 allowed
3329 if (Subtarget->hasSSE2())
3330 return make_vector<unsigned>(X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
3331 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7,
3333 return std::vector<unsigned>();
3337 return std::vector<unsigned>();
3340 /// isLegalAddressImmediate - Return true if the integer value or
3341 /// GlobalValue can be used as the offset of the target addressing mode.
3342 bool X86TargetLowering::isLegalAddressImmediate(int64_t V) const {
3343 // X86 allows a sign-extended 32-bit immediate field.
3344 return (V > -(1LL << 32) && V < (1LL << 32)-1);
3347 bool X86TargetLowering::isLegalAddressImmediate(GlobalValue *GV) const {
3348 if (Subtarget->isTargetDarwin()) {
3349 Reloc::Model RModel = getTargetMachine().getRelocationModel();
3350 if (RModel == Reloc::Static)
3352 else if (RModel == Reloc::DynamicNoPIC)
3353 return !DarwinGVRequiresExtraLoad(GV);
3360 /// isShuffleMaskLegal - Targets can use this to indicate that they only
3361 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
3362 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
3363 /// are assumed to be legal.
3365 X86TargetLowering::isShuffleMaskLegal(SDOperand Mask, MVT::ValueType VT) const {
3366 // Only do shuffles on 128-bit vector types for now.
3367 if (MVT::getSizeInBits(VT) == 64) return false;
3368 return (Mask.Val->getNumOperands() <= 4 ||
3369 isSplatMask(Mask.Val) ||
3370 isPSHUFHW_PSHUFLWMask(Mask.Val) ||
3371 X86::isUNPCKLMask(Mask.Val) ||
3372 X86::isUNPCKL_v_undef_Mask(Mask.Val) ||
3373 X86::isUNPCKHMask(Mask.Val));