1 //===-- X86ISelLowering.cpp - X86 DAG Lowering Implementation -------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the interfaces that X86 uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
16 #include "X86InstrBuilder.h"
17 #include "X86ISelLowering.h"
18 #include "X86MachineFunctionInfo.h"
19 #include "X86TargetMachine.h"
20 #include "llvm/CallingConv.h"
21 #include "llvm/Constants.h"
22 #include "llvm/DerivedTypes.h"
23 #include "llvm/GlobalVariable.h"
24 #include "llvm/Function.h"
25 #include "llvm/Intrinsics.h"
26 #include "llvm/ADT/BitVector.h"
27 #include "llvm/ADT/VectorExtras.h"
28 #include "llvm/Analysis/ScalarEvolutionExpressions.h"
29 #include "llvm/CodeGen/CallingConvLower.h"
30 #include "llvm/CodeGen/MachineFrameInfo.h"
31 #include "llvm/CodeGen/MachineFunction.h"
32 #include "llvm/CodeGen/MachineInstrBuilder.h"
33 #include "llvm/CodeGen/MachineModuleInfo.h"
34 #include "llvm/CodeGen/MachineRegisterInfo.h"
35 #include "llvm/CodeGen/PseudoSourceValue.h"
36 #include "llvm/CodeGen/SelectionDAG.h"
37 #include "llvm/Support/MathExtras.h"
38 #include "llvm/Support/Debug.h"
39 #include "llvm/Target/TargetOptions.h"
40 #include "llvm/ADT/SmallSet.h"
41 #include "llvm/ADT/StringExtras.h"
42 #include "llvm/ParamAttrsList.h"
45 X86TargetLowering::X86TargetLowering(TargetMachine &TM)
46 : TargetLowering(TM) {
47 Subtarget = &TM.getSubtarget<X86Subtarget>();
48 X86ScalarSSEf64 = Subtarget->hasSSE2();
49 X86ScalarSSEf32 = Subtarget->hasSSE1();
50 X86StackPtr = Subtarget->is64Bit() ? X86::RSP : X86::ESP;
54 RegInfo = TM.getRegisterInfo();
56 // Set up the TargetLowering object.
58 // X86 is weird, it always uses i8 for shift amounts and setcc results.
59 setShiftAmountType(MVT::i8);
60 setSetCCResultType(MVT::i8);
61 setSetCCResultContents(ZeroOrOneSetCCResult);
62 setSchedulingPreference(SchedulingForRegPressure);
63 setShiftAmountFlavor(Mask); // shl X, 32 == shl X, 0
64 setStackPointerRegisterToSaveRestore(X86StackPtr);
66 if (Subtarget->isTargetDarwin()) {
67 // Darwin should use _setjmp/_longjmp instead of setjmp/longjmp.
68 setUseUnderscoreSetJmp(false);
69 setUseUnderscoreLongJmp(false);
70 } else if (Subtarget->isTargetMingw()) {
71 // MS runtime is weird: it exports _setjmp, but longjmp!
72 setUseUnderscoreSetJmp(true);
73 setUseUnderscoreLongJmp(false);
75 setUseUnderscoreSetJmp(true);
76 setUseUnderscoreLongJmp(true);
79 // Set up the register classes.
80 addRegisterClass(MVT::i8, X86::GR8RegisterClass);
81 addRegisterClass(MVT::i16, X86::GR16RegisterClass);
82 addRegisterClass(MVT::i32, X86::GR32RegisterClass);
83 if (Subtarget->is64Bit())
84 addRegisterClass(MVT::i64, X86::GR64RegisterClass);
86 setLoadXAction(ISD::SEXTLOAD, MVT::i1, Promote);
88 // We don't accept any truncstore of integer registers.
89 setTruncStoreAction(MVT::i64, MVT::i32, Expand);
90 setTruncStoreAction(MVT::i64, MVT::i16, Expand);
91 setTruncStoreAction(MVT::i64, MVT::i8 , Expand);
92 setTruncStoreAction(MVT::i32, MVT::i16, Expand);
93 setTruncStoreAction(MVT::i32, MVT::i8 , Expand);
94 setTruncStoreAction(MVT::i16, MVT::i8, Expand);
96 // Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this
98 setOperationAction(ISD::UINT_TO_FP , MVT::i1 , Promote);
99 setOperationAction(ISD::UINT_TO_FP , MVT::i8 , Promote);
100 setOperationAction(ISD::UINT_TO_FP , MVT::i16 , Promote);
102 if (Subtarget->is64Bit()) {
103 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Expand);
104 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Promote);
107 // If SSE i64 SINT_TO_FP is not available, expand i32 UINT_TO_FP.
108 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Expand);
110 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Promote);
113 // Promote i1/i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have
115 setOperationAction(ISD::SINT_TO_FP , MVT::i1 , Promote);
116 setOperationAction(ISD::SINT_TO_FP , MVT::i8 , Promote);
117 // SSE has no i16 to fp conversion, only i32
118 if (X86ScalarSSEf32) {
119 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
120 // f32 and f64 cases are Legal, f80 case is not
121 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
123 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Custom);
124 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
127 // In 32-bit mode these are custom lowered. In 64-bit mode F32 and F64
128 // are Legal, f80 is custom lowered.
129 setOperationAction(ISD::FP_TO_SINT , MVT::i64 , Custom);
130 setOperationAction(ISD::SINT_TO_FP , MVT::i64 , Custom);
132 // Promote i1/i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have
134 setOperationAction(ISD::FP_TO_SINT , MVT::i1 , Promote);
135 setOperationAction(ISD::FP_TO_SINT , MVT::i8 , Promote);
137 if (X86ScalarSSEf32) {
138 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Promote);
139 // f32 and f64 cases are Legal, f80 case is not
140 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
142 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Custom);
143 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
146 // Handle FP_TO_UINT by promoting the destination to a larger signed
148 setOperationAction(ISD::FP_TO_UINT , MVT::i1 , Promote);
149 setOperationAction(ISD::FP_TO_UINT , MVT::i8 , Promote);
150 setOperationAction(ISD::FP_TO_UINT , MVT::i16 , Promote);
152 if (Subtarget->is64Bit()) {
153 setOperationAction(ISD::FP_TO_UINT , MVT::i64 , Expand);
154 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
156 if (X86ScalarSSEf32 && !Subtarget->hasSSE3())
157 // Expand FP_TO_UINT into a select.
158 // FIXME: We would like to use a Custom expander here eventually to do
159 // the optimal thing for SSE vs. the default expansion in the legalizer.
160 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Expand);
162 // With SSE3 we can use fisttpll to convert to a signed i64.
163 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
166 // TODO: when we have SSE, these could be more efficient, by using movd/movq.
167 if (!X86ScalarSSEf64) {
168 setOperationAction(ISD::BIT_CONVERT , MVT::f32 , Expand);
169 setOperationAction(ISD::BIT_CONVERT , MVT::i32 , Expand);
172 // Scalar integer divide and remainder are lowered to use operations that
173 // produce two results, to match the available instructions. This exposes
174 // the two-result form to trivial CSE, which is able to combine x/y and x%y
175 // into a single instruction.
177 // Scalar integer multiply-high is also lowered to use two-result
178 // operations, to match the available instructions. However, plain multiply
179 // (low) operations are left as Legal, as there are single-result
180 // instructions for this in x86. Using the two-result multiply instructions
181 // when both high and low results are needed must be arranged by dagcombine.
182 setOperationAction(ISD::MULHS , MVT::i8 , Expand);
183 setOperationAction(ISD::MULHU , MVT::i8 , Expand);
184 setOperationAction(ISD::SDIV , MVT::i8 , Expand);
185 setOperationAction(ISD::UDIV , MVT::i8 , Expand);
186 setOperationAction(ISD::SREM , MVT::i8 , Expand);
187 setOperationAction(ISD::UREM , MVT::i8 , Expand);
188 setOperationAction(ISD::MULHS , MVT::i16 , Expand);
189 setOperationAction(ISD::MULHU , MVT::i16 , Expand);
190 setOperationAction(ISD::SDIV , MVT::i16 , Expand);
191 setOperationAction(ISD::UDIV , MVT::i16 , Expand);
192 setOperationAction(ISD::SREM , MVT::i16 , Expand);
193 setOperationAction(ISD::UREM , MVT::i16 , Expand);
194 setOperationAction(ISD::MULHS , MVT::i32 , Expand);
195 setOperationAction(ISD::MULHU , MVT::i32 , Expand);
196 setOperationAction(ISD::SDIV , MVT::i32 , Expand);
197 setOperationAction(ISD::UDIV , MVT::i32 , Expand);
198 setOperationAction(ISD::SREM , MVT::i32 , Expand);
199 setOperationAction(ISD::UREM , MVT::i32 , Expand);
200 setOperationAction(ISD::MULHS , MVT::i64 , Expand);
201 setOperationAction(ISD::MULHU , MVT::i64 , Expand);
202 setOperationAction(ISD::SDIV , MVT::i64 , Expand);
203 setOperationAction(ISD::UDIV , MVT::i64 , Expand);
204 setOperationAction(ISD::SREM , MVT::i64 , Expand);
205 setOperationAction(ISD::UREM , MVT::i64 , Expand);
207 setOperationAction(ISD::BR_JT , MVT::Other, Expand);
208 setOperationAction(ISD::BRCOND , MVT::Other, Custom);
209 setOperationAction(ISD::BR_CC , MVT::Other, Expand);
210 setOperationAction(ISD::SELECT_CC , MVT::Other, Expand);
211 setOperationAction(ISD::MEMMOVE , MVT::Other, Expand);
212 if (Subtarget->is64Bit())
213 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i32, Legal);
214 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16 , Legal);
215 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Legal);
216 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
217 setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
218 setOperationAction(ISD::FREM , MVT::f32 , Expand);
219 setOperationAction(ISD::FREM , MVT::f64 , Expand);
220 setOperationAction(ISD::FREM , MVT::f80 , Expand);
221 setOperationAction(ISD::FLT_ROUNDS_ , MVT::i32 , Custom);
223 setOperationAction(ISD::CTPOP , MVT::i8 , Expand);
224 setOperationAction(ISD::CTTZ , MVT::i8 , Custom);
225 setOperationAction(ISD::CTLZ , MVT::i8 , Custom);
226 setOperationAction(ISD::CTPOP , MVT::i16 , Expand);
227 setOperationAction(ISD::CTTZ , MVT::i16 , Custom);
228 setOperationAction(ISD::CTLZ , MVT::i16 , Custom);
229 setOperationAction(ISD::CTPOP , MVT::i32 , Expand);
230 setOperationAction(ISD::CTTZ , MVT::i32 , Custom);
231 setOperationAction(ISD::CTLZ , MVT::i32 , Custom);
232 if (Subtarget->is64Bit()) {
233 setOperationAction(ISD::CTPOP , MVT::i64 , Expand);
234 setOperationAction(ISD::CTTZ , MVT::i64 , Custom);
235 setOperationAction(ISD::CTLZ , MVT::i64 , Custom);
238 setOperationAction(ISD::READCYCLECOUNTER , MVT::i64 , Custom);
239 setOperationAction(ISD::BSWAP , MVT::i16 , Expand);
241 // These should be promoted to a larger select which is supported.
242 setOperationAction(ISD::SELECT , MVT::i1 , Promote);
243 setOperationAction(ISD::SELECT , MVT::i8 , Promote);
244 // X86 wants to expand cmov itself.
245 setOperationAction(ISD::SELECT , MVT::i16 , Custom);
246 setOperationAction(ISD::SELECT , MVT::i32 , Custom);
247 setOperationAction(ISD::SELECT , MVT::f32 , Custom);
248 setOperationAction(ISD::SELECT , MVT::f64 , Custom);
249 setOperationAction(ISD::SELECT , MVT::f80 , Custom);
250 setOperationAction(ISD::SETCC , MVT::i8 , Custom);
251 setOperationAction(ISD::SETCC , MVT::i16 , Custom);
252 setOperationAction(ISD::SETCC , MVT::i32 , Custom);
253 setOperationAction(ISD::SETCC , MVT::f32 , Custom);
254 setOperationAction(ISD::SETCC , MVT::f64 , Custom);
255 setOperationAction(ISD::SETCC , MVT::f80 , Custom);
256 if (Subtarget->is64Bit()) {
257 setOperationAction(ISD::SELECT , MVT::i64 , Custom);
258 setOperationAction(ISD::SETCC , MVT::i64 , Custom);
260 // X86 ret instruction may pop stack.
261 setOperationAction(ISD::RET , MVT::Other, Custom);
262 if (!Subtarget->is64Bit())
263 setOperationAction(ISD::EH_RETURN , MVT::Other, Custom);
266 setOperationAction(ISD::ConstantPool , MVT::i32 , Custom);
267 setOperationAction(ISD::JumpTable , MVT::i32 , Custom);
268 setOperationAction(ISD::GlobalAddress , MVT::i32 , Custom);
269 setOperationAction(ISD::GlobalTLSAddress, MVT::i32 , Custom);
270 setOperationAction(ISD::ExternalSymbol , MVT::i32 , Custom);
271 if (Subtarget->is64Bit()) {
272 setOperationAction(ISD::ConstantPool , MVT::i64 , Custom);
273 setOperationAction(ISD::JumpTable , MVT::i64 , Custom);
274 setOperationAction(ISD::GlobalAddress , MVT::i64 , Custom);
275 setOperationAction(ISD::ExternalSymbol, MVT::i64 , Custom);
277 // 64-bit addm sub, shl, sra, srl (iff 32-bit x86)
278 setOperationAction(ISD::SHL_PARTS , MVT::i32 , Custom);
279 setOperationAction(ISD::SRA_PARTS , MVT::i32 , Custom);
280 setOperationAction(ISD::SRL_PARTS , MVT::i32 , Custom);
281 if (Subtarget->is64Bit()) {
282 setOperationAction(ISD::SHL_PARTS , MVT::i64 , Custom);
283 setOperationAction(ISD::SRA_PARTS , MVT::i64 , Custom);
284 setOperationAction(ISD::SRL_PARTS , MVT::i64 , Custom);
286 // X86 wants to expand memset / memcpy itself.
287 setOperationAction(ISD::MEMSET , MVT::Other, Custom);
288 setOperationAction(ISD::MEMCPY , MVT::Other, Custom);
290 if (!Subtarget->hasSSE1())
291 setOperationAction(ISD::PREFETCH , MVT::Other, Expand);
293 if (!Subtarget->hasSSE2())
294 setOperationAction(ISD::MEMBARRIER , MVT::Other, Expand);
296 setOperationAction(ISD::ATOMIC_LCS , MVT::i8, Custom);
297 setOperationAction(ISD::ATOMIC_LCS , MVT::i16, Custom);
298 setOperationAction(ISD::ATOMIC_LCS , MVT::i32, Custom);
299 setOperationAction(ISD::ATOMIC_LCS , MVT::i64, Custom);
301 // Use the default ISD::LOCATION, ISD::DECLARE expansion.
302 setOperationAction(ISD::LOCATION, MVT::Other, Expand);
303 // FIXME - use subtarget debug flags
304 if (!Subtarget->isTargetDarwin() &&
305 !Subtarget->isTargetELF() &&
306 !Subtarget->isTargetCygMing())
307 setOperationAction(ISD::LABEL, MVT::Other, Expand);
309 setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
310 setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
311 setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
312 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
313 if (Subtarget->is64Bit()) {
315 setExceptionPointerRegister(X86::RAX);
316 setExceptionSelectorRegister(X86::RDX);
318 setExceptionPointerRegister(X86::EAX);
319 setExceptionSelectorRegister(X86::EDX);
321 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i32, Custom);
323 setOperationAction(ISD::TRAMPOLINE, MVT::Other, Custom);
325 setOperationAction(ISD::TRAP, MVT::Other, Legal);
327 // VASTART needs to be custom lowered to use the VarArgsFrameIndex
328 setOperationAction(ISD::VASTART , MVT::Other, Custom);
329 setOperationAction(ISD::VAARG , MVT::Other, Expand);
330 setOperationAction(ISD::VAEND , MVT::Other, Expand);
331 if (Subtarget->is64Bit())
332 setOperationAction(ISD::VACOPY , MVT::Other, Custom);
334 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
336 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
337 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
338 if (Subtarget->is64Bit())
339 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand);
340 if (Subtarget->isTargetCygMing())
341 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Custom);
343 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand);
345 if (X86ScalarSSEf64) {
346 // f32 and f64 use SSE.
347 // Set up the FP register classes.
348 addRegisterClass(MVT::f32, X86::FR32RegisterClass);
349 addRegisterClass(MVT::f64, X86::FR64RegisterClass);
351 // Use ANDPD to simulate FABS.
352 setOperationAction(ISD::FABS , MVT::f64, Custom);
353 setOperationAction(ISD::FABS , MVT::f32, Custom);
355 // Use XORP to simulate FNEG.
356 setOperationAction(ISD::FNEG , MVT::f64, Custom);
357 setOperationAction(ISD::FNEG , MVT::f32, Custom);
359 // Use ANDPD and ORPD to simulate FCOPYSIGN.
360 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
361 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
363 // We don't support sin/cos/fmod
364 setOperationAction(ISD::FSIN , MVT::f64, Expand);
365 setOperationAction(ISD::FCOS , MVT::f64, Expand);
366 setOperationAction(ISD::FSIN , MVT::f32, Expand);
367 setOperationAction(ISD::FCOS , MVT::f32, Expand);
369 // Expand FP immediates into loads from the stack, except for the special
371 addLegalFPImmediate(APFloat(+0.0)); // xorpd
372 addLegalFPImmediate(APFloat(+0.0f)); // xorps
374 // Floating truncations from f80 and extensions to f80 go through memory.
375 // If optimizing, we lie about this though and handle it in
376 // InstructionSelectPreprocess so that dagcombine2 can hack on these.
378 setConvertAction(MVT::f32, MVT::f80, Expand);
379 setConvertAction(MVT::f64, MVT::f80, Expand);
380 setConvertAction(MVT::f80, MVT::f32, Expand);
381 setConvertAction(MVT::f80, MVT::f64, Expand);
383 } else if (X86ScalarSSEf32) {
384 // Use SSE for f32, x87 for f64.
385 // Set up the FP register classes.
386 addRegisterClass(MVT::f32, X86::FR32RegisterClass);
387 addRegisterClass(MVT::f64, X86::RFP64RegisterClass);
389 // Use ANDPS to simulate FABS.
390 setOperationAction(ISD::FABS , MVT::f32, Custom);
392 // Use XORP to simulate FNEG.
393 setOperationAction(ISD::FNEG , MVT::f32, Custom);
395 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
397 // Use ANDPS and ORPS to simulate FCOPYSIGN.
398 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
399 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
401 // We don't support sin/cos/fmod
402 setOperationAction(ISD::FSIN , MVT::f32, Expand);
403 setOperationAction(ISD::FCOS , MVT::f32, Expand);
405 // Special cases we handle for FP constants.
406 addLegalFPImmediate(APFloat(+0.0f)); // xorps
407 addLegalFPImmediate(APFloat(+0.0)); // FLD0
408 addLegalFPImmediate(APFloat(+1.0)); // FLD1
409 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
410 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
412 // SSE <-> X87 conversions go through memory. If optimizing, we lie about
413 // this though and handle it in InstructionSelectPreprocess so that
414 // dagcombine2 can hack on these.
416 setConvertAction(MVT::f32, MVT::f64, Expand);
417 setConvertAction(MVT::f32, MVT::f80, Expand);
418 setConvertAction(MVT::f80, MVT::f32, Expand);
419 setConvertAction(MVT::f64, MVT::f32, Expand);
420 // And x87->x87 truncations also.
421 setConvertAction(MVT::f80, MVT::f64, Expand);
425 setOperationAction(ISD::FSIN , MVT::f64 , Expand);
426 setOperationAction(ISD::FCOS , MVT::f64 , Expand);
429 // f32 and f64 in x87.
430 // Set up the FP register classes.
431 addRegisterClass(MVT::f64, X86::RFP64RegisterClass);
432 addRegisterClass(MVT::f32, X86::RFP32RegisterClass);
434 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
435 setOperationAction(ISD::UNDEF, MVT::f32, Expand);
436 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
437 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
439 // Floating truncations go through memory. If optimizing, we lie about
440 // this though and handle it in InstructionSelectPreprocess so that
441 // dagcombine2 can hack on these.
443 setConvertAction(MVT::f80, MVT::f32, Expand);
444 setConvertAction(MVT::f64, MVT::f32, Expand);
445 setConvertAction(MVT::f80, MVT::f64, Expand);
449 setOperationAction(ISD::FSIN , MVT::f64 , Expand);
450 setOperationAction(ISD::FCOS , MVT::f64 , Expand);
452 addLegalFPImmediate(APFloat(+0.0)); // FLD0
453 addLegalFPImmediate(APFloat(+1.0)); // FLD1
454 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
455 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
456 addLegalFPImmediate(APFloat(+0.0f)); // FLD0
457 addLegalFPImmediate(APFloat(+1.0f)); // FLD1
458 addLegalFPImmediate(APFloat(-0.0f)); // FLD0/FCHS
459 addLegalFPImmediate(APFloat(-1.0f)); // FLD1/FCHS
462 // Long double always uses X87.
463 addRegisterClass(MVT::f80, X86::RFP80RegisterClass);
464 setOperationAction(ISD::UNDEF, MVT::f80, Expand);
465 setOperationAction(ISD::FCOPYSIGN, MVT::f80, Expand);
467 APFloat TmpFlt(+0.0);
468 TmpFlt.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven);
469 addLegalFPImmediate(TmpFlt); // FLD0
471 addLegalFPImmediate(TmpFlt); // FLD0/FCHS
472 APFloat TmpFlt2(+1.0);
473 TmpFlt2.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven);
474 addLegalFPImmediate(TmpFlt2); // FLD1
475 TmpFlt2.changeSign();
476 addLegalFPImmediate(TmpFlt2); // FLD1/FCHS
480 setOperationAction(ISD::FSIN , MVT::f80 , Expand);
481 setOperationAction(ISD::FCOS , MVT::f80 , Expand);
484 // Always use a library call for pow.
485 setOperationAction(ISD::FPOW , MVT::f32 , Expand);
486 setOperationAction(ISD::FPOW , MVT::f64 , Expand);
487 setOperationAction(ISD::FPOW , MVT::f80 , Expand);
489 // First set operation action for all vector types to expand. Then we
490 // will selectively turn on ones that can be effectively codegen'd.
491 for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
492 VT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++VT) {
493 setOperationAction(ISD::ADD , (MVT::ValueType)VT, Expand);
494 setOperationAction(ISD::SUB , (MVT::ValueType)VT, Expand);
495 setOperationAction(ISD::FADD, (MVT::ValueType)VT, Expand);
496 setOperationAction(ISD::FNEG, (MVT::ValueType)VT, Expand);
497 setOperationAction(ISD::FSUB, (MVT::ValueType)VT, Expand);
498 setOperationAction(ISD::MUL , (MVT::ValueType)VT, Expand);
499 setOperationAction(ISD::FMUL, (MVT::ValueType)VT, Expand);
500 setOperationAction(ISD::SDIV, (MVT::ValueType)VT, Expand);
501 setOperationAction(ISD::UDIV, (MVT::ValueType)VT, Expand);
502 setOperationAction(ISD::FDIV, (MVT::ValueType)VT, Expand);
503 setOperationAction(ISD::SREM, (MVT::ValueType)VT, Expand);
504 setOperationAction(ISD::UREM, (MVT::ValueType)VT, Expand);
505 setOperationAction(ISD::LOAD, (MVT::ValueType)VT, Expand);
506 setOperationAction(ISD::VECTOR_SHUFFLE, (MVT::ValueType)VT, Expand);
507 setOperationAction(ISD::EXTRACT_VECTOR_ELT, (MVT::ValueType)VT, Expand);
508 setOperationAction(ISD::INSERT_VECTOR_ELT, (MVT::ValueType)VT, Expand);
509 setOperationAction(ISD::FABS, (MVT::ValueType)VT, Expand);
510 setOperationAction(ISD::FSIN, (MVT::ValueType)VT, Expand);
511 setOperationAction(ISD::FCOS, (MVT::ValueType)VT, Expand);
512 setOperationAction(ISD::FREM, (MVT::ValueType)VT, Expand);
513 setOperationAction(ISD::FPOWI, (MVT::ValueType)VT, Expand);
514 setOperationAction(ISD::FSQRT, (MVT::ValueType)VT, Expand);
515 setOperationAction(ISD::FCOPYSIGN, (MVT::ValueType)VT, Expand);
516 setOperationAction(ISD::SMUL_LOHI, (MVT::ValueType)VT, Expand);
517 setOperationAction(ISD::UMUL_LOHI, (MVT::ValueType)VT, Expand);
518 setOperationAction(ISD::SDIVREM, (MVT::ValueType)VT, Expand);
519 setOperationAction(ISD::UDIVREM, (MVT::ValueType)VT, Expand);
520 setOperationAction(ISD::FPOW, (MVT::ValueType)VT, Expand);
521 setOperationAction(ISD::CTPOP, (MVT::ValueType)VT, Expand);
522 setOperationAction(ISD::CTTZ, (MVT::ValueType)VT, Expand);
523 setOperationAction(ISD::CTLZ, (MVT::ValueType)VT, Expand);
524 setOperationAction(ISD::SHL, (MVT::ValueType)VT, Expand);
525 setOperationAction(ISD::SRA, (MVT::ValueType)VT, Expand);
526 setOperationAction(ISD::SRL, (MVT::ValueType)VT, Expand);
527 setOperationAction(ISD::ROTL, (MVT::ValueType)VT, Expand);
528 setOperationAction(ISD::ROTR, (MVT::ValueType)VT, Expand);
529 setOperationAction(ISD::BSWAP, (MVT::ValueType)VT, Expand);
532 if (Subtarget->hasMMX()) {
533 addRegisterClass(MVT::v8i8, X86::VR64RegisterClass);
534 addRegisterClass(MVT::v4i16, X86::VR64RegisterClass);
535 addRegisterClass(MVT::v2i32, X86::VR64RegisterClass);
536 addRegisterClass(MVT::v1i64, X86::VR64RegisterClass);
538 // FIXME: add MMX packed arithmetics
540 setOperationAction(ISD::ADD, MVT::v8i8, Legal);
541 setOperationAction(ISD::ADD, MVT::v4i16, Legal);
542 setOperationAction(ISD::ADD, MVT::v2i32, Legal);
543 setOperationAction(ISD::ADD, MVT::v1i64, Legal);
545 setOperationAction(ISD::SUB, MVT::v8i8, Legal);
546 setOperationAction(ISD::SUB, MVT::v4i16, Legal);
547 setOperationAction(ISD::SUB, MVT::v2i32, Legal);
548 setOperationAction(ISD::SUB, MVT::v1i64, Legal);
550 setOperationAction(ISD::MULHS, MVT::v4i16, Legal);
551 setOperationAction(ISD::MUL, MVT::v4i16, Legal);
553 setOperationAction(ISD::AND, MVT::v8i8, Promote);
554 AddPromotedToType (ISD::AND, MVT::v8i8, MVT::v1i64);
555 setOperationAction(ISD::AND, MVT::v4i16, Promote);
556 AddPromotedToType (ISD::AND, MVT::v4i16, MVT::v1i64);
557 setOperationAction(ISD::AND, MVT::v2i32, Promote);
558 AddPromotedToType (ISD::AND, MVT::v2i32, MVT::v1i64);
559 setOperationAction(ISD::AND, MVT::v1i64, Legal);
561 setOperationAction(ISD::OR, MVT::v8i8, Promote);
562 AddPromotedToType (ISD::OR, MVT::v8i8, MVT::v1i64);
563 setOperationAction(ISD::OR, MVT::v4i16, Promote);
564 AddPromotedToType (ISD::OR, MVT::v4i16, MVT::v1i64);
565 setOperationAction(ISD::OR, MVT::v2i32, Promote);
566 AddPromotedToType (ISD::OR, MVT::v2i32, MVT::v1i64);
567 setOperationAction(ISD::OR, MVT::v1i64, Legal);
569 setOperationAction(ISD::XOR, MVT::v8i8, Promote);
570 AddPromotedToType (ISD::XOR, MVT::v8i8, MVT::v1i64);
571 setOperationAction(ISD::XOR, MVT::v4i16, Promote);
572 AddPromotedToType (ISD::XOR, MVT::v4i16, MVT::v1i64);
573 setOperationAction(ISD::XOR, MVT::v2i32, Promote);
574 AddPromotedToType (ISD::XOR, MVT::v2i32, MVT::v1i64);
575 setOperationAction(ISD::XOR, MVT::v1i64, Legal);
577 setOperationAction(ISD::LOAD, MVT::v8i8, Promote);
578 AddPromotedToType (ISD::LOAD, MVT::v8i8, MVT::v1i64);
579 setOperationAction(ISD::LOAD, MVT::v4i16, Promote);
580 AddPromotedToType (ISD::LOAD, MVT::v4i16, MVT::v1i64);
581 setOperationAction(ISD::LOAD, MVT::v2i32, Promote);
582 AddPromotedToType (ISD::LOAD, MVT::v2i32, MVT::v1i64);
583 setOperationAction(ISD::LOAD, MVT::v1i64, Legal);
585 setOperationAction(ISD::BUILD_VECTOR, MVT::v8i8, Custom);
586 setOperationAction(ISD::BUILD_VECTOR, MVT::v4i16, Custom);
587 setOperationAction(ISD::BUILD_VECTOR, MVT::v2i32, Custom);
588 setOperationAction(ISD::BUILD_VECTOR, MVT::v1i64, Custom);
590 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v8i8, Custom);
591 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4i16, Custom);
592 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i32, Custom);
593 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v1i64, Custom);
595 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i8, Custom);
596 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i16, Custom);
597 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v1i64, Custom);
600 if (Subtarget->hasSSE1()) {
601 addRegisterClass(MVT::v4f32, X86::VR128RegisterClass);
603 setOperationAction(ISD::FADD, MVT::v4f32, Legal);
604 setOperationAction(ISD::FSUB, MVT::v4f32, Legal);
605 setOperationAction(ISD::FMUL, MVT::v4f32, Legal);
606 setOperationAction(ISD::FDIV, MVT::v4f32, Legal);
607 setOperationAction(ISD::FSQRT, MVT::v4f32, Legal);
608 setOperationAction(ISD::FNEG, MVT::v4f32, Custom);
609 setOperationAction(ISD::LOAD, MVT::v4f32, Legal);
610 setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
611 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4f32, Custom);
612 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
613 setOperationAction(ISD::SELECT, MVT::v4f32, Custom);
616 if (Subtarget->hasSSE2()) {
617 addRegisterClass(MVT::v2f64, X86::VR128RegisterClass);
618 addRegisterClass(MVT::v16i8, X86::VR128RegisterClass);
619 addRegisterClass(MVT::v8i16, X86::VR128RegisterClass);
620 addRegisterClass(MVT::v4i32, X86::VR128RegisterClass);
621 addRegisterClass(MVT::v2i64, X86::VR128RegisterClass);
623 setOperationAction(ISD::ADD, MVT::v16i8, Legal);
624 setOperationAction(ISD::ADD, MVT::v8i16, Legal);
625 setOperationAction(ISD::ADD, MVT::v4i32, Legal);
626 setOperationAction(ISD::ADD, MVT::v2i64, Legal);
627 setOperationAction(ISD::SUB, MVT::v16i8, Legal);
628 setOperationAction(ISD::SUB, MVT::v8i16, Legal);
629 setOperationAction(ISD::SUB, MVT::v4i32, Legal);
630 setOperationAction(ISD::SUB, MVT::v2i64, Legal);
631 setOperationAction(ISD::MUL, MVT::v8i16, Legal);
632 setOperationAction(ISD::FADD, MVT::v2f64, Legal);
633 setOperationAction(ISD::FSUB, MVT::v2f64, Legal);
634 setOperationAction(ISD::FMUL, MVT::v2f64, Legal);
635 setOperationAction(ISD::FDIV, MVT::v2f64, Legal);
636 setOperationAction(ISD::FSQRT, MVT::v2f64, Legal);
637 setOperationAction(ISD::FNEG, MVT::v2f64, Custom);
639 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16i8, Custom);
640 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i16, Custom);
641 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
642 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
643 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
645 // Custom lower build_vector, vector_shuffle, and extract_vector_elt.
646 for (unsigned VT = (unsigned)MVT::v16i8; VT != (unsigned)MVT::v2i64; VT++) {
647 // Do not attempt to custom lower non-power-of-2 vectors
648 if (!isPowerOf2_32(MVT::getVectorNumElements(VT)))
650 setOperationAction(ISD::BUILD_VECTOR, (MVT::ValueType)VT, Custom);
651 setOperationAction(ISD::VECTOR_SHUFFLE, (MVT::ValueType)VT, Custom);
652 setOperationAction(ISD::EXTRACT_VECTOR_ELT, (MVT::ValueType)VT, Custom);
654 setOperationAction(ISD::BUILD_VECTOR, MVT::v2f64, Custom);
655 setOperationAction(ISD::BUILD_VECTOR, MVT::v2i64, Custom);
656 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Custom);
657 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Custom);
658 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2f64, Custom);
659 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Custom);
660 if (Subtarget->is64Bit()) {
661 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Custom);
662 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
665 // Promote v16i8, v8i16, v4i32 load, select, and, or, xor to v2i64.
666 for (unsigned VT = (unsigned)MVT::v16i8; VT != (unsigned)MVT::v2i64; VT++) {
667 setOperationAction(ISD::AND, (MVT::ValueType)VT, Promote);
668 AddPromotedToType (ISD::AND, (MVT::ValueType)VT, MVT::v2i64);
669 setOperationAction(ISD::OR, (MVT::ValueType)VT, Promote);
670 AddPromotedToType (ISD::OR, (MVT::ValueType)VT, MVT::v2i64);
671 setOperationAction(ISD::XOR, (MVT::ValueType)VT, Promote);
672 AddPromotedToType (ISD::XOR, (MVT::ValueType)VT, MVT::v2i64);
673 setOperationAction(ISD::LOAD, (MVT::ValueType)VT, Promote);
674 AddPromotedToType (ISD::LOAD, (MVT::ValueType)VT, MVT::v2i64);
675 setOperationAction(ISD::SELECT, (MVT::ValueType)VT, Promote);
676 AddPromotedToType (ISD::SELECT, (MVT::ValueType)VT, MVT::v2i64);
679 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
681 // Custom lower v2i64 and v2f64 selects.
682 setOperationAction(ISD::LOAD, MVT::v2f64, Legal);
683 setOperationAction(ISD::LOAD, MVT::v2i64, Legal);
684 setOperationAction(ISD::SELECT, MVT::v2f64, Custom);
685 setOperationAction(ISD::SELECT, MVT::v2i64, Custom);
688 if (Subtarget->hasSSE41()) {
689 // FIXME: Do we need to handle scalar-to-vector here?
690 setOperationAction(ISD::MUL, MVT::v4i32, Legal);
692 // i8 and i16 vectors are custom , because the source register and source
693 // source memory operand types are not the same width. f32 vectors are
694 // custom since the immediate controlling the insert encodes additional
696 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i8, Custom);
697 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
698 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Legal);
699 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
701 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v16i8, Custom);
702 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v8i16, Custom);
703 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4i32, Legal);
704 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Legal);
706 if (Subtarget->is64Bit()) {
707 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Legal);
708 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Legal);
712 // We want to custom lower some of our intrinsics.
713 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
715 // We have target-specific dag combine patterns for the following nodes:
716 setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
717 setTargetDAGCombine(ISD::SELECT);
718 setTargetDAGCombine(ISD::STORE);
720 computeRegisterProperties();
722 // FIXME: These should be based on subtarget info. Plus, the values should
723 // be smaller when we are in optimizing for size mode.
724 maxStoresPerMemset = 16; // For %llvm.memset -> sequence of stores
725 maxStoresPerMemcpy = 16; // For %llvm.memcpy -> sequence of stores
726 maxStoresPerMemmove = 16; // For %llvm.memmove -> sequence of stores
727 allowUnalignedMemoryAccesses = true; // x86 supports it!
728 setPrefLoopAlignment(16);
731 /// getMaxByValAlign - Helper for getByValTypeAlignment to determine
732 /// the desired ByVal argument alignment.
733 static void getMaxByValAlign(const Type *Ty, unsigned &MaxAlign) {
736 if (const VectorType *VTy = dyn_cast<VectorType>(Ty)) {
737 if (VTy->getBitWidth() == 128)
739 } else if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
740 unsigned EltAlign = 0;
741 getMaxByValAlign(ATy->getElementType(), EltAlign);
742 if (EltAlign > MaxAlign)
744 } else if (const StructType *STy = dyn_cast<StructType>(Ty)) {
745 for (unsigned i = 0, e = STy->getNumElements(); i != e; ++i) {
746 unsigned EltAlign = 0;
747 getMaxByValAlign(STy->getElementType(i), EltAlign);
748 if (EltAlign > MaxAlign)
757 /// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
758 /// function arguments in the caller parameter area. For X86, aggregates
759 /// that contain SSE vectors are placed at 16-byte boundaries while the rest
760 /// are at 4-byte boundaries.
761 unsigned X86TargetLowering::getByValTypeAlignment(const Type *Ty) const {
762 if (Subtarget->is64Bit())
763 return getTargetData()->getABITypeAlignment(Ty);
765 if (Subtarget->hasSSE1())
766 getMaxByValAlign(Ty, Align);
770 /// getPICJumpTableRelocaBase - Returns relocation base for the given PIC
772 SDOperand X86TargetLowering::getPICJumpTableRelocBase(SDOperand Table,
773 SelectionDAG &DAG) const {
774 if (usesGlobalOffsetTable())
775 return DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, getPointerTy());
776 if (!Subtarget->isPICStyleRIPRel())
777 return DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy());
781 //===----------------------------------------------------------------------===//
782 // Return Value Calling Convention Implementation
783 //===----------------------------------------------------------------------===//
785 #include "X86GenCallingConv.inc"
787 /// GetPossiblePreceedingTailCall - Get preceeding X86ISD::TAILCALL node if it
788 /// exists skip possible ISD:TokenFactor.
789 static SDOperand GetPossiblePreceedingTailCall(SDOperand Chain) {
790 if (Chain.getOpcode() == X86ISD::TAILCALL) {
792 } else if (Chain.getOpcode() == ISD::TokenFactor) {
793 if (Chain.getNumOperands() &&
794 Chain.getOperand(0).getOpcode() == X86ISD::TAILCALL)
795 return Chain.getOperand(0);
800 /// LowerRET - Lower an ISD::RET node.
801 SDOperand X86TargetLowering::LowerRET(SDOperand Op, SelectionDAG &DAG) {
802 assert((Op.getNumOperands() & 1) == 1 && "ISD::RET should have odd # args");
804 SmallVector<CCValAssign, 16> RVLocs;
805 unsigned CC = DAG.getMachineFunction().getFunction()->getCallingConv();
806 bool isVarArg = DAG.getMachineFunction().getFunction()->isVarArg();
807 CCState CCInfo(CC, isVarArg, getTargetMachine(), RVLocs);
808 CCInfo.AnalyzeReturn(Op.Val, RetCC_X86);
810 // If this is the first return lowered for this function, add the regs to the
811 // liveout set for the function.
812 if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
813 for (unsigned i = 0; i != RVLocs.size(); ++i)
814 if (RVLocs[i].isRegLoc())
815 DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
817 SDOperand Chain = Op.getOperand(0);
819 // Handle tail call return.
820 Chain = GetPossiblePreceedingTailCall(Chain);
821 if (Chain.getOpcode() == X86ISD::TAILCALL) {
822 SDOperand TailCall = Chain;
823 SDOperand TargetAddress = TailCall.getOperand(1);
824 SDOperand StackAdjustment = TailCall.getOperand(2);
825 assert(((TargetAddress.getOpcode() == ISD::Register &&
826 (cast<RegisterSDNode>(TargetAddress)->getReg() == X86::ECX ||
827 cast<RegisterSDNode>(TargetAddress)->getReg() == X86::R9)) ||
828 TargetAddress.getOpcode() == ISD::TargetExternalSymbol ||
829 TargetAddress.getOpcode() == ISD::TargetGlobalAddress) &&
830 "Expecting an global address, external symbol, or register");
831 assert(StackAdjustment.getOpcode() == ISD::Constant &&
832 "Expecting a const value");
834 SmallVector<SDOperand,8> Operands;
835 Operands.push_back(Chain.getOperand(0));
836 Operands.push_back(TargetAddress);
837 Operands.push_back(StackAdjustment);
838 // Copy registers used by the call. Last operand is a flag so it is not
840 for (unsigned i=3; i < TailCall.getNumOperands()-1; i++) {
841 Operands.push_back(Chain.getOperand(i));
843 return DAG.getNode(X86ISD::TC_RETURN, MVT::Other, &Operands[0],
850 // Copy the result values into the output registers.
851 if (RVLocs.size() != 1 || !RVLocs[0].isRegLoc() ||
852 RVLocs[0].getLocReg() != X86::ST0) {
853 for (unsigned i = 0; i != RVLocs.size(); ++i) {
854 CCValAssign &VA = RVLocs[i];
855 assert(VA.isRegLoc() && "Can only return in registers!");
856 Chain = DAG.getCopyToReg(Chain, VA.getLocReg(), Op.getOperand(i*2+1),
858 Flag = Chain.getValue(1);
861 // We need to handle a destination of ST0 specially, because it isn't really
863 SDOperand Value = Op.getOperand(1);
865 // an XMM register onto the fp-stack. Do this with an FP_EXTEND to f80.
866 // This will get legalized into a load/store if it can't get optimized away.
867 if (isScalarFPTypeInSSEReg(RVLocs[0].getValVT()))
868 Value = DAG.getNode(ISD::FP_EXTEND, MVT::f80, Value);
870 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
871 SDOperand Ops[] = { Chain, Value };
872 Chain = DAG.getNode(X86ISD::FP_SET_RESULT, Tys, Ops, 2);
873 Flag = Chain.getValue(1);
876 SDOperand BytesToPop = DAG.getConstant(getBytesToPopOnReturn(), MVT::i16);
878 return DAG.getNode(X86ISD::RET_FLAG, MVT::Other, Chain, BytesToPop, Flag);
880 return DAG.getNode(X86ISD::RET_FLAG, MVT::Other, Chain, BytesToPop);
884 /// LowerCallResult - Lower the result values of an ISD::CALL into the
885 /// appropriate copies out of appropriate physical registers. This assumes that
886 /// Chain/InFlag are the input chain/flag to use, and that TheCall is the call
887 /// being lowered. The returns a SDNode with the same number of values as the
889 SDNode *X86TargetLowering::
890 LowerCallResult(SDOperand Chain, SDOperand InFlag, SDNode *TheCall,
891 unsigned CallingConv, SelectionDAG &DAG) {
893 // Assign locations to each value returned by this call.
894 SmallVector<CCValAssign, 16> RVLocs;
895 bool isVarArg = cast<ConstantSDNode>(TheCall->getOperand(2))->getValue() != 0;
896 CCState CCInfo(CallingConv, isVarArg, getTargetMachine(), RVLocs);
897 CCInfo.AnalyzeCallResult(TheCall, RetCC_X86);
899 SmallVector<SDOperand, 8> ResultVals;
901 // Copy all of the result registers out of their specified physreg.
902 if (RVLocs.size() != 1 || RVLocs[0].getLocReg() != X86::ST0) {
903 for (unsigned i = 0; i != RVLocs.size(); ++i) {
904 Chain = DAG.getCopyFromReg(Chain, RVLocs[i].getLocReg(),
905 RVLocs[i].getValVT(), InFlag).getValue(1);
906 InFlag = Chain.getValue(2);
907 ResultVals.push_back(Chain.getValue(0));
910 // Copies from the FP stack are special, as ST0 isn't a valid register
911 // before the fp stackifier runs.
913 // Copy ST0 into an RFP register with FP_GET_RESULT. If this will end up
914 // in an SSE register, copy it out as F80 and do a truncate, otherwise use
915 // the specified value type.
916 MVT::ValueType GetResultTy = RVLocs[0].getValVT();
917 if (isScalarFPTypeInSSEReg(GetResultTy))
918 GetResultTy = MVT::f80;
919 SDVTList Tys = DAG.getVTList(GetResultTy, MVT::Other, MVT::Flag);
921 SDOperand GROps[] = { Chain, InFlag };
922 SDOperand RetVal = DAG.getNode(X86ISD::FP_GET_RESULT, Tys, GROps, 2);
923 Chain = RetVal.getValue(1);
924 InFlag = RetVal.getValue(2);
926 // If we want the result in an SSE register, use an FP_TRUNCATE to get it
928 if (GetResultTy != RVLocs[0].getValVT())
929 RetVal = DAG.getNode(ISD::FP_ROUND, RVLocs[0].getValVT(), RetVal,
930 // This truncation won't change the value.
931 DAG.getIntPtrConstant(1));
933 ResultVals.push_back(RetVal);
936 // Merge everything together with a MERGE_VALUES node.
937 ResultVals.push_back(Chain);
938 return DAG.getNode(ISD::MERGE_VALUES, TheCall->getVTList(),
939 &ResultVals[0], ResultVals.size()).Val;
942 /// LowerCallResultToTwo64BitRegs - Lower the result values of an x86-64
943 /// ISD::CALL where the results are known to be in two 64-bit registers,
944 /// e.g. XMM0 and XMM1. This simplify store the two values back to the
945 /// fixed stack slot allocated for StructRet.
946 SDNode *X86TargetLowering::
947 LowerCallResultToTwo64BitRegs(SDOperand Chain, SDOperand InFlag,
948 SDNode *TheCall, unsigned Reg1, unsigned Reg2,
949 MVT::ValueType VT, SelectionDAG &DAG) {
950 SDOperand RetVal1 = DAG.getCopyFromReg(Chain, Reg1, VT, InFlag);
951 Chain = RetVal1.getValue(1);
952 InFlag = RetVal1.getValue(2);
953 SDOperand RetVal2 = DAG.getCopyFromReg(Chain, Reg2, VT, InFlag);
954 Chain = RetVal2.getValue(1);
955 InFlag = RetVal2.getValue(2);
956 SDOperand FIN = TheCall->getOperand(5);
957 Chain = DAG.getStore(Chain, RetVal1, FIN, NULL, 0);
958 FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN, DAG.getIntPtrConstant(8));
959 Chain = DAG.getStore(Chain, RetVal2, FIN, NULL, 0);
963 /// LowerCallResultToTwoX87Regs - Lower the result values of an x86-64 ISD::CALL
964 /// where the results are known to be in ST0 and ST1.
965 SDNode *X86TargetLowering::
966 LowerCallResultToTwoX87Regs(SDOperand Chain, SDOperand InFlag,
967 SDNode *TheCall, SelectionDAG &DAG) {
968 SmallVector<SDOperand, 8> ResultVals;
969 const MVT::ValueType VTs[] = { MVT::f80, MVT::f80, MVT::Other, MVT::Flag };
970 SDVTList Tys = DAG.getVTList(VTs, 4);
971 SDOperand Ops[] = { Chain, InFlag };
972 SDOperand RetVal = DAG.getNode(X86ISD::FP_GET_RESULT2, Tys, Ops, 2);
973 Chain = RetVal.getValue(2);
974 SDOperand FIN = TheCall->getOperand(5);
975 Chain = DAG.getStore(Chain, RetVal.getValue(1), FIN, NULL, 0);
976 FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN, DAG.getIntPtrConstant(16));
977 Chain = DAG.getStore(Chain, RetVal, FIN, NULL, 0);
981 //===----------------------------------------------------------------------===//
982 // C & StdCall & Fast Calling Convention implementation
983 //===----------------------------------------------------------------------===//
984 // StdCall calling convention seems to be standard for many Windows' API
985 // routines and around. It differs from C calling convention just a little:
986 // callee should clean up the stack, not caller. Symbols should be also
987 // decorated in some fancy way :) It doesn't support any vector arguments.
988 // For info on fast calling convention see Fast Calling Convention (tail call)
989 // implementation LowerX86_32FastCCCallTo.
991 /// AddLiveIn - This helper function adds the specified physical register to the
992 /// MachineFunction as a live in value. It also creates a corresponding virtual
994 static unsigned AddLiveIn(MachineFunction &MF, unsigned PReg,
995 const TargetRegisterClass *RC) {
996 assert(RC->contains(PReg) && "Not the correct regclass!");
997 unsigned VReg = MF.getRegInfo().createVirtualRegister(RC);
998 MF.getRegInfo().addLiveIn(PReg, VReg);
1002 /// CallIsStructReturn - Determines whether a CALL node uses struct return
1004 static bool CallIsStructReturn(SDOperand Op) {
1005 unsigned NumOps = (Op.getNumOperands() - 5) / 2;
1009 ConstantSDNode *Flags = cast<ConstantSDNode>(Op.getOperand(6));
1010 return Flags->getValue() & ISD::ParamFlags::StructReturn;
1013 /// ArgsAreStructReturn - Determines whether a FORMAL_ARGUMENTS node uses struct
1014 /// return semantics.
1015 static bool ArgsAreStructReturn(SDOperand Op) {
1016 unsigned NumArgs = Op.Val->getNumValues() - 1;
1020 ConstantSDNode *Flags = cast<ConstantSDNode>(Op.getOperand(3));
1021 return Flags->getValue() & ISD::ParamFlags::StructReturn;
1024 /// IsCalleePop - Determines whether a CALL or FORMAL_ARGUMENTS node requires the
1025 /// callee to pop its own arguments. Callee pop is necessary to support tail
1027 bool X86TargetLowering::IsCalleePop(SDOperand Op) {
1028 bool IsVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
1032 switch (cast<ConstantSDNode>(Op.getOperand(1))->getValue()) {
1035 case CallingConv::X86_StdCall:
1036 return !Subtarget->is64Bit();
1037 case CallingConv::X86_FastCall:
1038 return !Subtarget->is64Bit();
1039 case CallingConv::Fast:
1040 return PerformTailCallOpt;
1044 /// CCAssignFnForNode - Selects the correct CCAssignFn for a CALL or
1045 /// FORMAL_ARGUMENTS node.
1046 CCAssignFn *X86TargetLowering::CCAssignFnForNode(SDOperand Op) const {
1047 unsigned CC = cast<ConstantSDNode>(Op.getOperand(1))->getValue();
1049 if (Subtarget->is64Bit()) {
1050 if (CC == CallingConv::Fast && PerformTailCallOpt)
1051 return CC_X86_64_TailCall;
1056 if (CC == CallingConv::X86_FastCall)
1057 return CC_X86_32_FastCall;
1058 else if (CC == CallingConv::Fast && PerformTailCallOpt)
1059 return CC_X86_32_TailCall;
1064 /// NameDecorationForFORMAL_ARGUMENTS - Selects the appropriate decoration to
1065 /// apply to a MachineFunction containing a given FORMAL_ARGUMENTS node.
1067 X86TargetLowering::NameDecorationForFORMAL_ARGUMENTS(SDOperand Op) {
1068 unsigned CC = cast<ConstantSDNode>(Op.getOperand(1))->getValue();
1069 if (CC == CallingConv::X86_FastCall)
1071 else if (CC == CallingConv::X86_StdCall)
1076 /// IsPossiblyOverwrittenArgumentOfTailCall - Check if the operand could
1077 /// possibly be overwritten when lowering the outgoing arguments in a tail
1078 /// call. Currently the implementation of this call is very conservative and
1079 /// assumes all arguments sourcing from FORMAL_ARGUMENTS or a CopyFromReg with
1080 /// virtual registers would be overwritten by direct lowering.
1081 static bool IsPossiblyOverwrittenArgumentOfTailCall(SDOperand Op,
1082 MachineFrameInfo * MFI) {
1083 RegisterSDNode * OpReg = NULL;
1084 FrameIndexSDNode * FrameIdxNode = NULL;
1086 if (Op.getOpcode() == ISD::FORMAL_ARGUMENTS ||
1087 (Op.getOpcode()== ISD::CopyFromReg &&
1088 (OpReg = dyn_cast<RegisterSDNode>(Op.getOperand(1))) &&
1089 (OpReg->getReg() >= TargetRegisterInfo::FirstVirtualRegister)) ||
1090 (Op.getOpcode() == ISD::LOAD &&
1091 (FrameIdxNode = dyn_cast<FrameIndexSDNode>(Op.getOperand(1))) &&
1092 (MFI->isFixedObjectIndex((FrameIdx = FrameIdxNode->getIndex()))) &&
1093 (MFI->getObjectOffset(FrameIdx) >= 0)))
1098 /// CallRequiresGOTInRegister - Check whether the call requires the GOT pointer
1099 /// in a register before calling.
1100 bool X86TargetLowering::CallRequiresGOTPtrInReg(bool Is64Bit, bool IsTailCall) {
1101 return !IsTailCall && !Is64Bit &&
1102 getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1103 Subtarget->isPICStyleGOT();
1107 /// CallRequiresFnAddressInReg - Check whether the call requires the function
1108 /// address to be loaded in a register.
1110 X86TargetLowering::CallRequiresFnAddressInReg(bool Is64Bit, bool IsTailCall) {
1111 return !Is64Bit && IsTailCall &&
1112 getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1113 Subtarget->isPICStyleGOT();
1116 /// CopyTailCallClobberedArgumentsToVRegs - Create virtual registers for all
1117 /// arguments to force loading and guarantee that arguments sourcing from
1118 /// incomming parameters are not overwriting each other.
1120 CopyTailCallClobberedArgumentsToVRegs(SDOperand Chain,
1121 SmallVector<std::pair<unsigned, SDOperand>, 8> &TailCallClobberedVRegs,
1123 MachineFunction &MF,
1124 const TargetLowering * TL) {
1127 for (unsigned i = 0, e = TailCallClobberedVRegs.size(); i != e; i++) {
1128 SDOperand Arg = TailCallClobberedVRegs[i].second;
1129 unsigned Idx = TailCallClobberedVRegs[i].first;
1132 createVirtualRegister(TL->getRegClassFor(Arg.getValueType()));
1133 Chain = DAG.getCopyToReg(Chain, VReg, Arg, InFlag);
1134 InFlag = Chain.getValue(1);
1135 Arg = DAG.getCopyFromReg(Chain, VReg, Arg.getValueType(), InFlag);
1136 TailCallClobberedVRegs[i] = std::make_pair(Idx, Arg);
1137 Chain = Arg.getValue(1);
1138 InFlag = Arg.getValue(2);
1143 /// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
1144 /// by "Src" to address "Dst" with size and alignment information specified by
1145 /// the specific parameter attribute. The copy will be passed as a byval function
1148 CreateCopyOfByValArgument(SDOperand Src, SDOperand Dst, SDOperand Chain,
1149 unsigned Flags, SelectionDAG &DAG) {
1150 unsigned Align = 1 <<
1151 ((Flags & ISD::ParamFlags::ByValAlign) >> ISD::ParamFlags::ByValAlignOffs);
1152 unsigned Size = (Flags & ISD::ParamFlags::ByValSize) >>
1153 ISD::ParamFlags::ByValSizeOffs;
1154 SDOperand AlignNode = DAG.getConstant(Align, MVT::i32);
1155 SDOperand SizeNode = DAG.getConstant(Size, MVT::i32);
1156 SDOperand AlwaysInline = DAG.getConstant(1, MVT::i32);
1157 return DAG.getMemcpy(Chain, Dst, Src, SizeNode, AlignNode, AlwaysInline);
1160 SDOperand X86TargetLowering::LowerMemArgument(SDOperand Op, SelectionDAG &DAG,
1161 const CCValAssign &VA,
1162 MachineFrameInfo *MFI,
1164 SDOperand Root, unsigned i) {
1165 // Create the nodes corresponding to a load from this parameter slot.
1166 unsigned Flags = cast<ConstantSDNode>(Op.getOperand(3 + i))->getValue();
1167 bool AlwaysUseMutable = (CC==CallingConv::Fast) && PerformTailCallOpt;
1168 bool isByVal = Flags & ISD::ParamFlags::ByVal;
1169 bool isImmutable = !AlwaysUseMutable && !isByVal;
1171 // FIXME: For now, all byval parameter objects are marked mutable. This can be
1172 // changed with more analysis.
1173 // In case of tail call optimization mark all arguments mutable. Since they
1174 // could be overwritten by lowering of arguments in case of a tail call.
1175 int FI = MFI->CreateFixedObject(MVT::getSizeInBits(VA.getValVT())/8,
1176 VA.getLocMemOffset(), isImmutable);
1177 SDOperand FIN = DAG.getFrameIndex(FI, getPointerTy());
1180 return DAG.getLoad(VA.getValVT(), Root, FIN,
1181 PseudoSourceValue::getFixedStack(), FI);
1185 X86TargetLowering::LowerFORMAL_ARGUMENTS(SDOperand Op, SelectionDAG &DAG) {
1186 MachineFunction &MF = DAG.getMachineFunction();
1187 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1189 const Function* Fn = MF.getFunction();
1190 if (Fn->hasExternalLinkage() &&
1191 Subtarget->isTargetCygMing() &&
1192 Fn->getName() == "main")
1193 FuncInfo->setForceFramePointer(true);
1195 // Decorate the function name.
1196 FuncInfo->setDecorationStyle(NameDecorationForFORMAL_ARGUMENTS(Op));
1198 MachineFrameInfo *MFI = MF.getFrameInfo();
1199 SDOperand Root = Op.getOperand(0);
1200 bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
1201 unsigned CC = MF.getFunction()->getCallingConv();
1202 bool Is64Bit = Subtarget->is64Bit();
1204 assert(!(isVarArg && CC == CallingConv::Fast) &&
1205 "Var args not supported with calling convention fastcc");
1207 // Assign locations to all of the incoming arguments.
1208 SmallVector<CCValAssign, 16> ArgLocs;
1209 CCState CCInfo(CC, isVarArg, getTargetMachine(), ArgLocs);
1210 CCInfo.AnalyzeFormalArguments(Op.Val, CCAssignFnForNode(Op));
1212 SmallVector<SDOperand, 8> ArgValues;
1213 unsigned LastVal = ~0U;
1214 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
1215 CCValAssign &VA = ArgLocs[i];
1216 // TODO: If an arg is passed in two places (e.g. reg and stack), skip later
1218 assert(VA.getValNo() != LastVal &&
1219 "Don't support value assigned to multiple locs yet");
1220 LastVal = VA.getValNo();
1222 if (VA.isRegLoc()) {
1223 MVT::ValueType RegVT = VA.getLocVT();
1224 TargetRegisterClass *RC;
1225 if (RegVT == MVT::i32)
1226 RC = X86::GR32RegisterClass;
1227 else if (Is64Bit && RegVT == MVT::i64)
1228 RC = X86::GR64RegisterClass;
1229 else if (RegVT == MVT::f32)
1230 RC = X86::FR32RegisterClass;
1231 else if (RegVT == MVT::f64)
1232 RC = X86::FR64RegisterClass;
1234 assert(MVT::isVector(RegVT));
1235 if (Is64Bit && MVT::getSizeInBits(RegVT) == 64) {
1236 RC = X86::GR64RegisterClass; // MMX values are passed in GPRs.
1239 RC = X86::VR128RegisterClass;
1242 unsigned Reg = AddLiveIn(DAG.getMachineFunction(), VA.getLocReg(), RC);
1243 SDOperand ArgValue = DAG.getCopyFromReg(Root, Reg, RegVT);
1245 // If this is an 8 or 16-bit value, it is really passed promoted to 32
1246 // bits. Insert an assert[sz]ext to capture this, then truncate to the
1248 if (VA.getLocInfo() == CCValAssign::SExt)
1249 ArgValue = DAG.getNode(ISD::AssertSext, RegVT, ArgValue,
1250 DAG.getValueType(VA.getValVT()));
1251 else if (VA.getLocInfo() == CCValAssign::ZExt)
1252 ArgValue = DAG.getNode(ISD::AssertZext, RegVT, ArgValue,
1253 DAG.getValueType(VA.getValVT()));
1255 if (VA.getLocInfo() != CCValAssign::Full)
1256 ArgValue = DAG.getNode(ISD::TRUNCATE, VA.getValVT(), ArgValue);
1258 // Handle MMX values passed in GPRs.
1259 if (Is64Bit && RegVT != VA.getLocVT() && RC == X86::GR64RegisterClass &&
1260 MVT::getSizeInBits(RegVT) == 64)
1261 ArgValue = DAG.getNode(ISD::BIT_CONVERT, VA.getLocVT(), ArgValue);
1263 ArgValues.push_back(ArgValue);
1265 assert(VA.isMemLoc());
1266 ArgValues.push_back(LowerMemArgument(Op, DAG, VA, MFI, CC, Root, i));
1270 unsigned StackSize = CCInfo.getNextStackOffset();
1271 // align stack specially for tail calls
1272 if (CC == CallingConv::Fast)
1273 StackSize = GetAlignedArgumentStackSize(StackSize, DAG);
1275 // If the function takes variable number of arguments, make a frame index for
1276 // the start of the first vararg value... for expansion of llvm.va_start.
1278 if (Is64Bit || CC != CallingConv::X86_FastCall) {
1279 VarArgsFrameIndex = MFI->CreateFixedObject(1, StackSize);
1282 static const unsigned GPR64ArgRegs[] = {
1283 X86::RDI, X86::RSI, X86::RDX, X86::RCX, X86::R8, X86::R9
1285 static const unsigned XMMArgRegs[] = {
1286 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
1287 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
1290 unsigned NumIntRegs = CCInfo.getFirstUnallocated(GPR64ArgRegs, 6);
1291 unsigned NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs, 8);
1293 // For X86-64, if there are vararg parameters that are passed via
1294 // registers, then we must store them to their spots on the stack so they
1295 // may be loaded by deferencing the result of va_next.
1296 VarArgsGPOffset = NumIntRegs * 8;
1297 VarArgsFPOffset = 6 * 8 + NumXMMRegs * 16;
1298 RegSaveFrameIndex = MFI->CreateStackObject(6 * 8 + 8 * 16, 16);
1300 // Store the integer parameter registers.
1301 SmallVector<SDOperand, 8> MemOps;
1302 SDOperand RSFIN = DAG.getFrameIndex(RegSaveFrameIndex, getPointerTy());
1303 SDOperand FIN = DAG.getNode(ISD::ADD, getPointerTy(), RSFIN,
1304 DAG.getIntPtrConstant(VarArgsGPOffset));
1305 for (; NumIntRegs != 6; ++NumIntRegs) {
1306 unsigned VReg = AddLiveIn(MF, GPR64ArgRegs[NumIntRegs],
1307 X86::GR64RegisterClass);
1308 SDOperand Val = DAG.getCopyFromReg(Root, VReg, MVT::i64);
1310 DAG.getStore(Val.getValue(1), Val, FIN,
1311 PseudoSourceValue::getFixedStack(),
1313 MemOps.push_back(Store);
1314 FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN,
1315 DAG.getIntPtrConstant(8));
1318 // Now store the XMM (fp + vector) parameter registers.
1319 FIN = DAG.getNode(ISD::ADD, getPointerTy(), RSFIN,
1320 DAG.getIntPtrConstant(VarArgsFPOffset));
1321 for (; NumXMMRegs != 8; ++NumXMMRegs) {
1322 unsigned VReg = AddLiveIn(MF, XMMArgRegs[NumXMMRegs],
1323 X86::VR128RegisterClass);
1324 SDOperand Val = DAG.getCopyFromReg(Root, VReg, MVT::v4f32);
1326 DAG.getStore(Val.getValue(1), Val, FIN,
1327 PseudoSourceValue::getFixedStack(),
1329 MemOps.push_back(Store);
1330 FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN,
1331 DAG.getIntPtrConstant(16));
1333 if (!MemOps.empty())
1334 Root = DAG.getNode(ISD::TokenFactor, MVT::Other,
1335 &MemOps[0], MemOps.size());
1339 // Make sure the instruction takes 8n+4 bytes to make sure the start of the
1340 // arguments and the arguments after the retaddr has been pushed are
1342 if (!Is64Bit && CC == CallingConv::X86_FastCall &&
1343 !Subtarget->isTargetCygMing() && !Subtarget->isTargetWindows() &&
1344 (StackSize & 7) == 0)
1347 ArgValues.push_back(Root);
1349 // Some CCs need callee pop.
1350 if (IsCalleePop(Op)) {
1351 BytesToPopOnReturn = StackSize; // Callee pops everything.
1352 BytesCallerReserves = 0;
1354 BytesToPopOnReturn = 0; // Callee pops nothing.
1355 // If this is an sret function, the return should pop the hidden pointer.
1356 if (!Is64Bit && ArgsAreStructReturn(Op))
1357 BytesToPopOnReturn = 4;
1358 BytesCallerReserves = StackSize;
1362 RegSaveFrameIndex = 0xAAAAAAA; // RegSaveFrameIndex is X86-64 only.
1363 if (CC == CallingConv::X86_FastCall)
1364 VarArgsFrameIndex = 0xAAAAAAA; // fastcc functions can't have varargs.
1367 FuncInfo->setBytesToPopOnReturn(BytesToPopOnReturn);
1369 // Return the new list of results.
1370 return DAG.getNode(ISD::MERGE_VALUES, Op.Val->getVTList(),
1371 &ArgValues[0], ArgValues.size()).getValue(Op.ResNo);
1375 X86TargetLowering::LowerMemOpCallTo(SDOperand Op, SelectionDAG &DAG,
1376 const SDOperand &StackPtr,
1377 const CCValAssign &VA,
1380 unsigned LocMemOffset = VA.getLocMemOffset();
1381 SDOperand PtrOff = DAG.getIntPtrConstant(LocMemOffset);
1382 PtrOff = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, PtrOff);
1383 SDOperand FlagsOp = Op.getOperand(6+2*VA.getValNo());
1384 unsigned Flags = cast<ConstantSDNode>(FlagsOp)->getValue();
1385 if (Flags & ISD::ParamFlags::ByVal) {
1386 return CreateCopyOfByValArgument(Arg, PtrOff, Chain, Flags, DAG);
1388 return DAG.getStore(Chain, Arg, PtrOff,
1389 PseudoSourceValue::getStack(), LocMemOffset);
1392 /// ClassifyX86_64SRetCallReturn - Classify how to implement a x86-64
1393 /// struct return call to the specified function. X86-64 ABI specifies
1394 /// some SRet calls are actually returned in registers. Since current
1395 /// LLVM cannot represent multi-value calls, they are represent as
1396 /// calls where the results are passed in a hidden struct provided by
1397 /// the caller. This function examines the type of the struct to
1398 /// determine the correct way to implement the call.
1400 X86TargetLowering::ClassifyX86_64SRetCallReturn(const Function *Fn) {
1401 // FIXME: Disabled for now.
1402 return X86::InMemory;
1404 const PointerType *PTy = cast<PointerType>(Fn->arg_begin()->getType());
1405 const Type *RTy = PTy->getElementType();
1406 unsigned Size = getTargetData()->getABITypeSize(RTy);
1407 if (Size != 16 && Size != 32)
1408 return X86::InMemory;
1411 const StructType *STy = dyn_cast<StructType>(RTy);
1412 if (!STy) return X86::InMemory;
1413 if (STy->getNumElements() == 2 &&
1414 STy->getElementType(0) == Type::X86_FP80Ty &&
1415 STy->getElementType(1) == Type::X86_FP80Ty)
1420 for (Type::subtype_iterator I = RTy->subtype_begin(), E = RTy->subtype_end();
1422 const Type *STy = I->get();
1423 if (!STy->isFPOrFPVector()) {
1431 return X86::InGPR64;
1434 void X86TargetLowering::X86_64AnalyzeSRetCallOperands(SDNode *TheCall,
1437 unsigned NumOps = (TheCall->getNumOperands() - 5) / 2;
1438 for (unsigned i = 1; i != NumOps; ++i) {
1439 MVT::ValueType ArgVT = TheCall->getOperand(5+2*i).getValueType();
1440 SDOperand FlagOp = TheCall->getOperand(5+2*i+1);
1441 unsigned ArgFlags =cast<ConstantSDNode>(FlagOp)->getValue();
1442 if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, CCInfo)) {
1443 cerr << "Call operand #" << i << " has unhandled type "
1444 << MVT::getValueTypeString(ArgVT) << "\n";
1450 SDOperand X86TargetLowering::LowerCALL(SDOperand Op, SelectionDAG &DAG) {
1451 MachineFunction &MF = DAG.getMachineFunction();
1452 MachineFrameInfo * MFI = MF.getFrameInfo();
1453 SDOperand Chain = Op.getOperand(0);
1454 unsigned CC = cast<ConstantSDNode>(Op.getOperand(1))->getValue();
1455 bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
1456 bool IsTailCall = cast<ConstantSDNode>(Op.getOperand(3))->getValue() != 0
1457 && CC == CallingConv::Fast && PerformTailCallOpt;
1458 SDOperand Callee = Op.getOperand(4);
1459 bool Is64Bit = Subtarget->is64Bit();
1460 bool IsStructRet = CallIsStructReturn(Op);
1462 assert(!(isVarArg && CC == CallingConv::Fast) &&
1463 "Var args not supported with calling convention fastcc");
1465 // Analyze operands of the call, assigning locations to each operand.
1466 SmallVector<CCValAssign, 16> ArgLocs;
1467 CCState CCInfo(CC, isVarArg, getTargetMachine(), ArgLocs);
1468 CCAssignFn *CCFn = CCAssignFnForNode(Op);
1470 X86::X86_64SRet SRetMethod = X86::InMemory;
1471 if (Is64Bit && IsStructRet)
1472 // FIXME: We can't figure out type of the sret structure for indirect
1473 // calls. We need to copy more information from CallSite to the ISD::CALL
1475 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
1477 ClassifyX86_64SRetCallReturn(dyn_cast<Function>(G->getGlobal()));
1479 // UGLY HACK! For x86-64, some 128-bit aggregates are returns in a pair of
1480 // registers. Unfortunately, llvm does not support i128 yet so we pretend it's
1482 if (SRetMethod != X86::InMemory)
1483 X86_64AnalyzeSRetCallOperands(Op.Val, CCFn, CCInfo);
1485 CCInfo.AnalyzeCallOperands(Op.Val, CCFn);
1487 // Get a count of how many bytes are to be pushed on the stack.
1488 unsigned NumBytes = CCInfo.getNextStackOffset();
1489 if (CC == CallingConv::Fast)
1490 NumBytes = GetAlignedArgumentStackSize(NumBytes, DAG);
1492 // Make sure the instruction takes 8n+4 bytes to make sure the start of the
1493 // arguments and the arguments after the retaddr has been pushed are aligned.
1494 if (!Is64Bit && CC == CallingConv::X86_FastCall &&
1495 !Subtarget->isTargetCygMing() && !Subtarget->isTargetWindows() &&
1496 (NumBytes & 7) == 0)
1501 // Lower arguments at fp - stackoffset + fpdiff.
1502 unsigned NumBytesCallerPushed =
1503 MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn();
1504 FPDiff = NumBytesCallerPushed - NumBytes;
1506 // Set the delta of movement of the returnaddr stackslot.
1507 // But only set if delta is greater than previous delta.
1508 if (FPDiff < (MF.getInfo<X86MachineFunctionInfo>()->getTCReturnAddrDelta()))
1509 MF.getInfo<X86MachineFunctionInfo>()->setTCReturnAddrDelta(FPDiff);
1512 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes));
1514 SDOperand RetAddrFrIdx;
1516 // Adjust the Return address stack slot.
1518 MVT::ValueType VT = Is64Bit ? MVT::i64 : MVT::i32;
1519 RetAddrFrIdx = getReturnAddressFrameIndex(DAG);
1520 // Load the "old" Return address.
1522 DAG.getLoad(VT, Chain,RetAddrFrIdx, NULL, 0);
1523 Chain = SDOperand(RetAddrFrIdx.Val, 1);
1527 SmallVector<std::pair<unsigned, SDOperand>, 8> RegsToPass;
1528 SmallVector<std::pair<unsigned, SDOperand>, 8> TailCallClobberedVRegs;
1529 SmallVector<SDOperand, 8> MemOpChains;
1533 // Walk the register/memloc assignments, inserting copies/loads. For tail
1534 // calls, remember all arguments for later special lowering.
1535 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
1536 CCValAssign &VA = ArgLocs[i];
1537 SDOperand Arg = Op.getOperand(5+2*VA.getValNo());
1539 // Promote the value if needed.
1540 switch (VA.getLocInfo()) {
1541 default: assert(0 && "Unknown loc info!");
1542 case CCValAssign::Full: break;
1543 case CCValAssign::SExt:
1544 Arg = DAG.getNode(ISD::SIGN_EXTEND, VA.getLocVT(), Arg);
1546 case CCValAssign::ZExt:
1547 Arg = DAG.getNode(ISD::ZERO_EXTEND, VA.getLocVT(), Arg);
1549 case CCValAssign::AExt:
1550 Arg = DAG.getNode(ISD::ANY_EXTEND, VA.getLocVT(), Arg);
1554 if (VA.isRegLoc()) {
1555 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
1558 assert(VA.isMemLoc());
1559 if (StackPtr.Val == 0)
1560 StackPtr = DAG.getCopyFromReg(Chain, X86StackPtr, getPointerTy());
1562 MemOpChains.push_back(LowerMemOpCallTo(Op, DAG, StackPtr, VA, Chain,
1564 } else if (IsPossiblyOverwrittenArgumentOfTailCall(Arg, MFI)) {
1565 TailCallClobberedVRegs.push_back(std::make_pair(i,Arg));
1570 if (!MemOpChains.empty())
1571 Chain = DAG.getNode(ISD::TokenFactor, MVT::Other,
1572 &MemOpChains[0], MemOpChains.size());
1574 // Build a sequence of copy-to-reg nodes chained together with token chain
1575 // and flag operands which copy the outgoing args into registers.
1577 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1578 Chain = DAG.getCopyToReg(Chain, RegsToPass[i].first, RegsToPass[i].second,
1580 InFlag = Chain.getValue(1);
1583 // ELF / PIC requires GOT in the EBX register before function calls via PLT
1585 if (CallRequiresGOTPtrInReg(Is64Bit, IsTailCall)) {
1586 Chain = DAG.getCopyToReg(Chain, X86::EBX,
1587 DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
1589 InFlag = Chain.getValue(1);
1591 // If we are tail calling and generating PIC/GOT style code load the address
1592 // of the callee into ecx. The value in ecx is used as target of the tail
1593 // jump. This is done to circumvent the ebx/callee-saved problem for tail
1594 // calls on PIC/GOT architectures. Normally we would just put the address of
1595 // GOT into ebx and then call target@PLT. But for tail callss ebx would be
1596 // restored (since ebx is callee saved) before jumping to the target@PLT.
1597 if (CallRequiresFnAddressInReg(Is64Bit, IsTailCall)) {
1598 // Note: The actual moving to ecx is done further down.
1599 GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee);
1600 if (G && !G->getGlobal()->hasHiddenVisibility() &&
1601 !G->getGlobal()->hasProtectedVisibility())
1602 Callee = LowerGlobalAddress(Callee, DAG);
1603 else if (isa<ExternalSymbolSDNode>(Callee))
1604 Callee = LowerExternalSymbol(Callee,DAG);
1607 if (Is64Bit && isVarArg) {
1608 // From AMD64 ABI document:
1609 // For calls that may call functions that use varargs or stdargs
1610 // (prototype-less calls or calls to functions containing ellipsis (...) in
1611 // the declaration) %al is used as hidden argument to specify the number
1612 // of SSE registers used. The contents of %al do not need to match exactly
1613 // the number of registers, but must be an ubound on the number of SSE
1614 // registers used and is in the range 0 - 8 inclusive.
1616 // Count the number of XMM registers allocated.
1617 static const unsigned XMMArgRegs[] = {
1618 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
1619 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
1621 unsigned NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs, 8);
1623 Chain = DAG.getCopyToReg(Chain, X86::AL,
1624 DAG.getConstant(NumXMMRegs, MVT::i8), InFlag);
1625 InFlag = Chain.getValue(1);
1629 // For tail calls lower the arguments to the 'real' stack slot.
1631 SmallVector<SDOperand, 8> MemOpChains2;
1634 // Do not flag preceeding copytoreg stuff together with the following stuff.
1635 InFlag = SDOperand();
1637 Chain = CopyTailCallClobberedArgumentsToVRegs(Chain, TailCallClobberedVRegs,
1640 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
1641 CCValAssign &VA = ArgLocs[i];
1642 if (!VA.isRegLoc()) {
1643 assert(VA.isMemLoc());
1644 SDOperand Arg = Op.getOperand(5+2*VA.getValNo());
1645 SDOperand FlagsOp = Op.getOperand(6+2*VA.getValNo());
1646 unsigned Flags = cast<ConstantSDNode>(FlagsOp)->getValue();
1647 // Create frame index.
1648 int32_t Offset = VA.getLocMemOffset()+FPDiff;
1649 uint32_t OpSize = (MVT::getSizeInBits(VA.getLocVT())+7)/8;
1650 FI = MF.getFrameInfo()->CreateFixedObject(OpSize, Offset);
1651 FIN = DAG.getFrameIndex(FI, MVT::i32);
1653 // Find virtual register for this argument.
1655 for (unsigned idx=0, e= TailCallClobberedVRegs.size(); idx < e; idx++)
1656 if (TailCallClobberedVRegs[idx].first==i) {
1657 Arg = TailCallClobberedVRegs[idx].second;
1661 assert(IsPossiblyOverwrittenArgumentOfTailCall(Arg, MFI)==false ||
1662 (Found==true && "No corresponding Argument was found"));
1664 if (Flags & ISD::ParamFlags::ByVal) {
1665 // Copy relative to framepointer.
1666 MemOpChains2.push_back(CreateCopyOfByValArgument(Arg, FIN, Chain,
1669 // Store relative to framepointer.
1670 MemOpChains2.push_back(
1671 DAG.getStore(Chain, Arg, FIN,
1672 PseudoSourceValue::getFixedStack(), FI));
1677 if (!MemOpChains2.empty())
1678 Chain = DAG.getNode(ISD::TokenFactor, MVT::Other,
1679 &MemOpChains2[0], MemOpChains2.size());
1681 // Store the return address to the appropriate stack slot.
1683 // Calculate the new stack slot for the return address.
1684 int SlotSize = Is64Bit ? 8 : 4;
1685 int NewReturnAddrFI =
1686 MF.getFrameInfo()->CreateFixedObject(SlotSize, FPDiff-SlotSize);
1687 MVT::ValueType VT = Is64Bit ? MVT::i64 : MVT::i32;
1688 SDOperand NewRetAddrFrIdx = DAG.getFrameIndex(NewReturnAddrFI, VT);
1689 Chain = DAG.getStore(Chain, RetAddrFrIdx, NewRetAddrFrIdx,
1690 PseudoSourceValue::getFixedStack(), NewReturnAddrFI);
1694 // If the callee is a GlobalAddress node (quite common, every direct call is)
1695 // turn it into a TargetGlobalAddress node so that legalize doesn't hack it.
1696 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1697 // We should use extra load for direct calls to dllimported functions in
1699 if ((IsTailCall || !Is64Bit ||
1700 getTargetMachine().getCodeModel() != CodeModel::Large)
1701 && !Subtarget->GVRequiresExtraLoad(G->getGlobal(),
1702 getTargetMachine(), true))
1703 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), getPointerTy());
1704 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
1705 if (IsTailCall || !Is64Bit ||
1706 getTargetMachine().getCodeModel() != CodeModel::Large)
1707 Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy());
1708 } else if (IsTailCall) {
1709 unsigned Opc = Is64Bit ? X86::R9 : X86::ECX;
1711 Chain = DAG.getCopyToReg(Chain,
1712 DAG.getRegister(Opc, getPointerTy()),
1714 Callee = DAG.getRegister(Opc, getPointerTy());
1715 // Add register as live out.
1716 DAG.getMachineFunction().getRegInfo().addLiveOut(Opc);
1719 // Returns a chain & a flag for retval copy to use.
1720 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
1721 SmallVector<SDOperand, 8> Ops;
1724 Ops.push_back(Chain);
1725 Ops.push_back(DAG.getIntPtrConstant(NumBytes));
1726 Ops.push_back(DAG.getIntPtrConstant(0));
1728 Ops.push_back(InFlag);
1729 Chain = DAG.getNode(ISD::CALLSEQ_END, NodeTys, &Ops[0], Ops.size());
1730 InFlag = Chain.getValue(1);
1732 // Returns a chain & a flag for retval copy to use.
1733 NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
1737 Ops.push_back(Chain);
1738 Ops.push_back(Callee);
1741 Ops.push_back(DAG.getConstant(FPDiff, MVT::i32));
1743 // Add an implicit use GOT pointer in EBX.
1744 if (!IsTailCall && !Is64Bit &&
1745 getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1746 Subtarget->isPICStyleGOT())
1747 Ops.push_back(DAG.getRegister(X86::EBX, getPointerTy()));
1749 // Add argument registers to the end of the list so that they are known live
1751 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
1752 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
1753 RegsToPass[i].second.getValueType()));
1756 Ops.push_back(InFlag);
1759 assert(InFlag.Val &&
1760 "Flag must be set. Depend on flag being set in LowerRET");
1761 Chain = DAG.getNode(X86ISD::TAILCALL,
1762 Op.Val->getVTList(), &Ops[0], Ops.size());
1764 return SDOperand(Chain.Val, Op.ResNo);
1767 Chain = DAG.getNode(X86ISD::CALL, NodeTys, &Ops[0], Ops.size());
1768 InFlag = Chain.getValue(1);
1770 // Create the CALLSEQ_END node.
1771 unsigned NumBytesForCalleeToPush;
1772 if (IsCalleePop(Op))
1773 NumBytesForCalleeToPush = NumBytes; // Callee pops everything
1774 else if (!Is64Bit && IsStructRet)
1775 // If this is is a call to a struct-return function, the callee
1776 // pops the hidden struct pointer, so we have to push it back.
1777 // This is common for Darwin/X86, Linux & Mingw32 targets.
1778 NumBytesForCalleeToPush = 4;
1780 NumBytesForCalleeToPush = 0; // Callee pops nothing.
1782 // Returns a flag for retval copy to use.
1783 Chain = DAG.getCALLSEQ_END(Chain,
1784 DAG.getIntPtrConstant(NumBytes),
1785 DAG.getIntPtrConstant(NumBytesForCalleeToPush),
1787 InFlag = Chain.getValue(1);
1789 // Handle result values, copying them out of physregs into vregs that we
1791 switch (SRetMethod) {
1793 return SDOperand(LowerCallResult(Chain, InFlag, Op.Val, CC, DAG), Op.ResNo);
1795 return SDOperand(LowerCallResultToTwo64BitRegs(Chain, InFlag, Op.Val,
1797 MVT::i64, DAG), Op.ResNo);
1799 return SDOperand(LowerCallResultToTwo64BitRegs(Chain, InFlag, Op.Val,
1800 X86::XMM0, X86::XMM1,
1801 MVT::f64, DAG), Op.ResNo);
1803 return SDOperand(LowerCallResultToTwoX87Regs(Chain, InFlag, Op.Val, DAG),
1809 //===----------------------------------------------------------------------===//
1810 // Fast Calling Convention (tail call) implementation
1811 //===----------------------------------------------------------------------===//
1813 // Like std call, callee cleans arguments, convention except that ECX is
1814 // reserved for storing the tail called function address. Only 2 registers are
1815 // free for argument passing (inreg). Tail call optimization is performed
1817 // * tailcallopt is enabled
1818 // * caller/callee are fastcc
1819 // On X86_64 architecture with GOT-style position independent code only local
1820 // (within module) calls are supported at the moment.
1821 // To keep the stack aligned according to platform abi the function
1822 // GetAlignedArgumentStackSize ensures that argument delta is always multiples
1823 // of stack alignment. (Dynamic linkers need this - darwin's dyld for example)
1824 // If a tail called function callee has more arguments than the caller the
1825 // caller needs to make sure that there is room to move the RETADDR to. This is
1826 // achieved by reserving an area the size of the argument delta right after the
1827 // original REtADDR, but before the saved framepointer or the spilled registers
1828 // e.g. caller(arg1, arg2) calls callee(arg1, arg2,arg3,arg4)
1840 /// GetAlignedArgumentStackSize - Make the stack size align e.g 16n + 12 aligned
1841 /// for a 16 byte align requirement.
1842 unsigned X86TargetLowering::GetAlignedArgumentStackSize(unsigned StackSize,
1843 SelectionDAG& DAG) {
1844 if (PerformTailCallOpt) {
1845 MachineFunction &MF = DAG.getMachineFunction();
1846 const TargetMachine &TM = MF.getTarget();
1847 const TargetFrameInfo &TFI = *TM.getFrameInfo();
1848 unsigned StackAlignment = TFI.getStackAlignment();
1849 uint64_t AlignMask = StackAlignment - 1;
1850 int64_t Offset = StackSize;
1851 unsigned SlotSize = Subtarget->is64Bit() ? 8 : 4;
1852 if ( (Offset & AlignMask) <= (StackAlignment - SlotSize) ) {
1853 // Number smaller than 12 so just add the difference.
1854 Offset += ((StackAlignment - SlotSize) - (Offset & AlignMask));
1856 // Mask out lower bits, add stackalignment once plus the 12 bytes.
1857 Offset = ((~AlignMask) & Offset) + StackAlignment +
1858 (StackAlignment-SlotSize);
1865 /// IsEligibleForTailCallElimination - Check to see whether the next instruction
1866 /// following the call is a return. A function is eligible if caller/callee
1867 /// calling conventions match, currently only fastcc supports tail calls, and
1868 /// the function CALL is immediatly followed by a RET.
1869 bool X86TargetLowering::IsEligibleForTailCallOptimization(SDOperand Call,
1871 SelectionDAG& DAG) const {
1872 if (!PerformTailCallOpt)
1875 // Check whether CALL node immediatly preceeds the RET node and whether the
1876 // return uses the result of the node or is a void return.
1877 unsigned NumOps = Ret.getNumOperands();
1879 (Ret.getOperand(0) == SDOperand(Call.Val,1) ||
1880 Ret.getOperand(0) == SDOperand(Call.Val,0))) ||
1882 Ret.getOperand(0) == SDOperand(Call.Val,Call.Val->getNumValues()-1) &&
1883 Ret.getOperand(1) == SDOperand(Call.Val,0))) {
1884 MachineFunction &MF = DAG.getMachineFunction();
1885 unsigned CallerCC = MF.getFunction()->getCallingConv();
1886 unsigned CalleeCC = cast<ConstantSDNode>(Call.getOperand(1))->getValue();
1887 if (CalleeCC == CallingConv::Fast && CallerCC == CalleeCC) {
1888 SDOperand Callee = Call.getOperand(4);
1889 // On x86/32Bit PIC/GOT tail calls are supported.
1890 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ ||
1891 !Subtarget->isPICStyleGOT()|| !Subtarget->is64Bit())
1894 // Can only do local tail calls (in same module, hidden or protected) on
1895 // x86_64 PIC/GOT at the moment.
1896 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
1897 return G->getGlobal()->hasHiddenVisibility()
1898 || G->getGlobal()->hasProtectedVisibility();
1905 //===----------------------------------------------------------------------===//
1906 // Other Lowering Hooks
1907 //===----------------------------------------------------------------------===//
1910 SDOperand X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) {
1911 MachineFunction &MF = DAG.getMachineFunction();
1912 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1913 int ReturnAddrIndex = FuncInfo->getRAIndex();
1915 if (ReturnAddrIndex == 0) {
1916 // Set up a frame object for the return address.
1917 if (Subtarget->is64Bit())
1918 ReturnAddrIndex = MF.getFrameInfo()->CreateFixedObject(8, -8);
1920 ReturnAddrIndex = MF.getFrameInfo()->CreateFixedObject(4, -4);
1922 FuncInfo->setRAIndex(ReturnAddrIndex);
1925 return DAG.getFrameIndex(ReturnAddrIndex, getPointerTy());
1930 /// translateX86CC - do a one to one translation of a ISD::CondCode to the X86
1931 /// specific condition code. It returns a false if it cannot do a direct
1932 /// translation. X86CC is the translated CondCode. LHS/RHS are modified as
1934 static bool translateX86CC(ISD::CondCode SetCCOpcode, bool isFP,
1935 unsigned &X86CC, SDOperand &LHS, SDOperand &RHS,
1936 SelectionDAG &DAG) {
1937 X86CC = X86::COND_INVALID;
1939 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS)) {
1940 if (SetCCOpcode == ISD::SETGT && RHSC->isAllOnesValue()) {
1941 // X > -1 -> X == 0, jump !sign.
1942 RHS = DAG.getConstant(0, RHS.getValueType());
1943 X86CC = X86::COND_NS;
1945 } else if (SetCCOpcode == ISD::SETLT && RHSC->isNullValue()) {
1946 // X < 0 -> X == 0, jump on sign.
1947 X86CC = X86::COND_S;
1949 } else if (SetCCOpcode == ISD::SETLT && RHSC->getValue() == 1) {
1951 RHS = DAG.getConstant(0, RHS.getValueType());
1952 X86CC = X86::COND_LE;
1957 switch (SetCCOpcode) {
1959 case ISD::SETEQ: X86CC = X86::COND_E; break;
1960 case ISD::SETGT: X86CC = X86::COND_G; break;
1961 case ISD::SETGE: X86CC = X86::COND_GE; break;
1962 case ISD::SETLT: X86CC = X86::COND_L; break;
1963 case ISD::SETLE: X86CC = X86::COND_LE; break;
1964 case ISD::SETNE: X86CC = X86::COND_NE; break;
1965 case ISD::SETULT: X86CC = X86::COND_B; break;
1966 case ISD::SETUGT: X86CC = X86::COND_A; break;
1967 case ISD::SETULE: X86CC = X86::COND_BE; break;
1968 case ISD::SETUGE: X86CC = X86::COND_AE; break;
1971 // On a floating point condition, the flags are set as follows:
1973 // 0 | 0 | 0 | X > Y
1974 // 0 | 0 | 1 | X < Y
1975 // 1 | 0 | 0 | X == Y
1976 // 1 | 1 | 1 | unordered
1978 switch (SetCCOpcode) {
1981 case ISD::SETEQ: X86CC = X86::COND_E; break;
1982 case ISD::SETOLT: Flip = true; // Fallthrough
1984 case ISD::SETGT: X86CC = X86::COND_A; break;
1985 case ISD::SETOLE: Flip = true; // Fallthrough
1987 case ISD::SETGE: X86CC = X86::COND_AE; break;
1988 case ISD::SETUGT: Flip = true; // Fallthrough
1990 case ISD::SETLT: X86CC = X86::COND_B; break;
1991 case ISD::SETUGE: Flip = true; // Fallthrough
1993 case ISD::SETLE: X86CC = X86::COND_BE; break;
1995 case ISD::SETNE: X86CC = X86::COND_NE; break;
1996 case ISD::SETUO: X86CC = X86::COND_P; break;
1997 case ISD::SETO: X86CC = X86::COND_NP; break;
2000 std::swap(LHS, RHS);
2003 return X86CC != X86::COND_INVALID;
2006 /// hasFPCMov - is there a floating point cmov for the specific X86 condition
2007 /// code. Current x86 isa includes the following FP cmov instructions:
2008 /// fcmovb, fcomvbe, fcomve, fcmovu, fcmovae, fcmova, fcmovne, fcmovnu.
2009 static bool hasFPCMov(unsigned X86CC) {
2025 /// isUndefOrInRange - Op is either an undef node or a ConstantSDNode. Return
2026 /// true if Op is undef or if its value falls within the specified range (L, H].
2027 static bool isUndefOrInRange(SDOperand Op, unsigned Low, unsigned Hi) {
2028 if (Op.getOpcode() == ISD::UNDEF)
2031 unsigned Val = cast<ConstantSDNode>(Op)->getValue();
2032 return (Val >= Low && Val < Hi);
2035 /// isUndefOrEqual - Op is either an undef node or a ConstantSDNode. Return
2036 /// true if Op is undef or if its value equal to the specified value.
2037 static bool isUndefOrEqual(SDOperand Op, unsigned Val) {
2038 if (Op.getOpcode() == ISD::UNDEF)
2040 return cast<ConstantSDNode>(Op)->getValue() == Val;
2043 /// isPSHUFDMask - Return true if the specified VECTOR_SHUFFLE operand
2044 /// specifies a shuffle of elements that is suitable for input to PSHUFD.
2045 bool X86::isPSHUFDMask(SDNode *N) {
2046 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2048 if (N->getNumOperands() != 2 && N->getNumOperands() != 4)
2051 // Check if the value doesn't reference the second vector.
2052 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
2053 SDOperand Arg = N->getOperand(i);
2054 if (Arg.getOpcode() == ISD::UNDEF) continue;
2055 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2056 if (cast<ConstantSDNode>(Arg)->getValue() >= e)
2063 /// isPSHUFHWMask - Return true if the specified VECTOR_SHUFFLE operand
2064 /// specifies a shuffle of elements that is suitable for input to PSHUFHW.
2065 bool X86::isPSHUFHWMask(SDNode *N) {
2066 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2068 if (N->getNumOperands() != 8)
2071 // Lower quadword copied in order.
2072 for (unsigned i = 0; i != 4; ++i) {
2073 SDOperand Arg = N->getOperand(i);
2074 if (Arg.getOpcode() == ISD::UNDEF) continue;
2075 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2076 if (cast<ConstantSDNode>(Arg)->getValue() != i)
2080 // Upper quadword shuffled.
2081 for (unsigned i = 4; i != 8; ++i) {
2082 SDOperand Arg = N->getOperand(i);
2083 if (Arg.getOpcode() == ISD::UNDEF) continue;
2084 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2085 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
2086 if (Val < 4 || Val > 7)
2093 /// isPSHUFLWMask - Return true if the specified VECTOR_SHUFFLE operand
2094 /// specifies a shuffle of elements that is suitable for input to PSHUFLW.
2095 bool X86::isPSHUFLWMask(SDNode *N) {
2096 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2098 if (N->getNumOperands() != 8)
2101 // Upper quadword copied in order.
2102 for (unsigned i = 4; i != 8; ++i)
2103 if (!isUndefOrEqual(N->getOperand(i), i))
2106 // Lower quadword shuffled.
2107 for (unsigned i = 0; i != 4; ++i)
2108 if (!isUndefOrInRange(N->getOperand(i), 0, 4))
2114 /// isSHUFPMask - Return true if the specified VECTOR_SHUFFLE operand
2115 /// specifies a shuffle of elements that is suitable for input to SHUFP*.
2116 static bool isSHUFPMask(const SDOperand *Elems, unsigned NumElems) {
2117 if (NumElems != 2 && NumElems != 4) return false;
2119 unsigned Half = NumElems / 2;
2120 for (unsigned i = 0; i < Half; ++i)
2121 if (!isUndefOrInRange(Elems[i], 0, NumElems))
2123 for (unsigned i = Half; i < NumElems; ++i)
2124 if (!isUndefOrInRange(Elems[i], NumElems, NumElems*2))
2130 bool X86::isSHUFPMask(SDNode *N) {
2131 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2132 return ::isSHUFPMask(N->op_begin(), N->getNumOperands());
2135 /// isCommutedSHUFP - Returns true if the shuffle mask is exactly
2136 /// the reverse of what x86 shuffles want. x86 shuffles requires the lower
2137 /// half elements to come from vector 1 (which would equal the dest.) and
2138 /// the upper half to come from vector 2.
2139 static bool isCommutedSHUFP(const SDOperand *Ops, unsigned NumOps) {
2140 if (NumOps != 2 && NumOps != 4) return false;
2142 unsigned Half = NumOps / 2;
2143 for (unsigned i = 0; i < Half; ++i)
2144 if (!isUndefOrInRange(Ops[i], NumOps, NumOps*2))
2146 for (unsigned i = Half; i < NumOps; ++i)
2147 if (!isUndefOrInRange(Ops[i], 0, NumOps))
2152 static bool isCommutedSHUFP(SDNode *N) {
2153 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2154 return isCommutedSHUFP(N->op_begin(), N->getNumOperands());
2157 /// isMOVHLPSMask - Return true if the specified VECTOR_SHUFFLE operand
2158 /// specifies a shuffle of elements that is suitable for input to MOVHLPS.
2159 bool X86::isMOVHLPSMask(SDNode *N) {
2160 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2162 if (N->getNumOperands() != 4)
2165 // Expect bit0 == 6, bit1 == 7, bit2 == 2, bit3 == 3
2166 return isUndefOrEqual(N->getOperand(0), 6) &&
2167 isUndefOrEqual(N->getOperand(1), 7) &&
2168 isUndefOrEqual(N->getOperand(2), 2) &&
2169 isUndefOrEqual(N->getOperand(3), 3);
2172 /// isMOVHLPS_v_undef_Mask - Special case of isMOVHLPSMask for canonical form
2173 /// of vector_shuffle v, v, <2, 3, 2, 3>, i.e. vector_shuffle v, undef,
2175 bool X86::isMOVHLPS_v_undef_Mask(SDNode *N) {
2176 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2178 if (N->getNumOperands() != 4)
2181 // Expect bit0 == 2, bit1 == 3, bit2 == 2, bit3 == 3
2182 return isUndefOrEqual(N->getOperand(0), 2) &&
2183 isUndefOrEqual(N->getOperand(1), 3) &&
2184 isUndefOrEqual(N->getOperand(2), 2) &&
2185 isUndefOrEqual(N->getOperand(3), 3);
2188 /// isMOVLPMask - Return true if the specified VECTOR_SHUFFLE operand
2189 /// specifies a shuffle of elements that is suitable for input to MOVLP{S|D}.
2190 bool X86::isMOVLPMask(SDNode *N) {
2191 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2193 unsigned NumElems = N->getNumOperands();
2194 if (NumElems != 2 && NumElems != 4)
2197 for (unsigned i = 0; i < NumElems/2; ++i)
2198 if (!isUndefOrEqual(N->getOperand(i), i + NumElems))
2201 for (unsigned i = NumElems/2; i < NumElems; ++i)
2202 if (!isUndefOrEqual(N->getOperand(i), i))
2208 /// isMOVHPMask - Return true if the specified VECTOR_SHUFFLE operand
2209 /// specifies a shuffle of elements that is suitable for input to MOVHP{S|D}
2211 bool X86::isMOVHPMask(SDNode *N) {
2212 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2214 unsigned NumElems = N->getNumOperands();
2215 if (NumElems != 2 && NumElems != 4)
2218 for (unsigned i = 0; i < NumElems/2; ++i)
2219 if (!isUndefOrEqual(N->getOperand(i), i))
2222 for (unsigned i = 0; i < NumElems/2; ++i) {
2223 SDOperand Arg = N->getOperand(i + NumElems/2);
2224 if (!isUndefOrEqual(Arg, i + NumElems))
2231 /// isUNPCKLMask - Return true if the specified VECTOR_SHUFFLE operand
2232 /// specifies a shuffle of elements that is suitable for input to UNPCKL.
2233 bool static isUNPCKLMask(const SDOperand *Elts, unsigned NumElts,
2234 bool V2IsSplat = false) {
2235 if (NumElts != 2 && NumElts != 4 && NumElts != 8 && NumElts != 16)
2238 for (unsigned i = 0, j = 0; i != NumElts; i += 2, ++j) {
2239 SDOperand BitI = Elts[i];
2240 SDOperand BitI1 = Elts[i+1];
2241 if (!isUndefOrEqual(BitI, j))
2244 if (isUndefOrEqual(BitI1, NumElts))
2247 if (!isUndefOrEqual(BitI1, j + NumElts))
2255 bool X86::isUNPCKLMask(SDNode *N, bool V2IsSplat) {
2256 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2257 return ::isUNPCKLMask(N->op_begin(), N->getNumOperands(), V2IsSplat);
2260 /// isUNPCKHMask - Return true if the specified VECTOR_SHUFFLE operand
2261 /// specifies a shuffle of elements that is suitable for input to UNPCKH.
2262 bool static isUNPCKHMask(const SDOperand *Elts, unsigned NumElts,
2263 bool V2IsSplat = false) {
2264 if (NumElts != 2 && NumElts != 4 && NumElts != 8 && NumElts != 16)
2267 for (unsigned i = 0, j = 0; i != NumElts; i += 2, ++j) {
2268 SDOperand BitI = Elts[i];
2269 SDOperand BitI1 = Elts[i+1];
2270 if (!isUndefOrEqual(BitI, j + NumElts/2))
2273 if (isUndefOrEqual(BitI1, NumElts))
2276 if (!isUndefOrEqual(BitI1, j + NumElts/2 + NumElts))
2284 bool X86::isUNPCKHMask(SDNode *N, bool V2IsSplat) {
2285 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2286 return ::isUNPCKHMask(N->op_begin(), N->getNumOperands(), V2IsSplat);
2289 /// isUNPCKL_v_undef_Mask - Special case of isUNPCKLMask for canonical form
2290 /// of vector_shuffle v, v, <0, 4, 1, 5>, i.e. vector_shuffle v, undef,
2292 bool X86::isUNPCKL_v_undef_Mask(SDNode *N) {
2293 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2295 unsigned NumElems = N->getNumOperands();
2296 if (NumElems != 2 && NumElems != 4 && NumElems != 8 && NumElems != 16)
2299 for (unsigned i = 0, j = 0; i != NumElems; i += 2, ++j) {
2300 SDOperand BitI = N->getOperand(i);
2301 SDOperand BitI1 = N->getOperand(i+1);
2303 if (!isUndefOrEqual(BitI, j))
2305 if (!isUndefOrEqual(BitI1, j))
2312 /// isUNPCKH_v_undef_Mask - Special case of isUNPCKHMask for canonical form
2313 /// of vector_shuffle v, v, <2, 6, 3, 7>, i.e. vector_shuffle v, undef,
2315 bool X86::isUNPCKH_v_undef_Mask(SDNode *N) {
2316 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2318 unsigned NumElems = N->getNumOperands();
2319 if (NumElems != 2 && NumElems != 4 && NumElems != 8 && NumElems != 16)
2322 for (unsigned i = 0, j = NumElems / 2; i != NumElems; i += 2, ++j) {
2323 SDOperand BitI = N->getOperand(i);
2324 SDOperand BitI1 = N->getOperand(i + 1);
2326 if (!isUndefOrEqual(BitI, j))
2328 if (!isUndefOrEqual(BitI1, j))
2335 /// isMOVLMask - Return true if the specified VECTOR_SHUFFLE operand
2336 /// specifies a shuffle of elements that is suitable for input to MOVSS,
2337 /// MOVSD, and MOVD, i.e. setting the lowest element.
2338 static bool isMOVLMask(const SDOperand *Elts, unsigned NumElts) {
2339 if (NumElts != 2 && NumElts != 4)
2342 if (!isUndefOrEqual(Elts[0], NumElts))
2345 for (unsigned i = 1; i < NumElts; ++i) {
2346 if (!isUndefOrEqual(Elts[i], i))
2353 bool X86::isMOVLMask(SDNode *N) {
2354 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2355 return ::isMOVLMask(N->op_begin(), N->getNumOperands());
2358 /// isCommutedMOVL - Returns true if the shuffle mask is except the reverse
2359 /// of what x86 movss want. X86 movs requires the lowest element to be lowest
2360 /// element of vector 2 and the other elements to come from vector 1 in order.
2361 static bool isCommutedMOVL(const SDOperand *Ops, unsigned NumOps,
2362 bool V2IsSplat = false,
2363 bool V2IsUndef = false) {
2364 if (NumOps != 2 && NumOps != 4 && NumOps != 8 && NumOps != 16)
2367 if (!isUndefOrEqual(Ops[0], 0))
2370 for (unsigned i = 1; i < NumOps; ++i) {
2371 SDOperand Arg = Ops[i];
2372 if (!(isUndefOrEqual(Arg, i+NumOps) ||
2373 (V2IsUndef && isUndefOrInRange(Arg, NumOps, NumOps*2)) ||
2374 (V2IsSplat && isUndefOrEqual(Arg, NumOps))))
2381 static bool isCommutedMOVL(SDNode *N, bool V2IsSplat = false,
2382 bool V2IsUndef = false) {
2383 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2384 return isCommutedMOVL(N->op_begin(), N->getNumOperands(),
2385 V2IsSplat, V2IsUndef);
2388 /// isMOVSHDUPMask - Return true if the specified VECTOR_SHUFFLE operand
2389 /// specifies a shuffle of elements that is suitable for input to MOVSHDUP.
2390 bool X86::isMOVSHDUPMask(SDNode *N) {
2391 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2393 if (N->getNumOperands() != 4)
2396 // Expect 1, 1, 3, 3
2397 for (unsigned i = 0; i < 2; ++i) {
2398 SDOperand Arg = N->getOperand(i);
2399 if (Arg.getOpcode() == ISD::UNDEF) continue;
2400 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2401 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
2402 if (Val != 1) return false;
2406 for (unsigned i = 2; i < 4; ++i) {
2407 SDOperand Arg = N->getOperand(i);
2408 if (Arg.getOpcode() == ISD::UNDEF) continue;
2409 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2410 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
2411 if (Val != 3) return false;
2415 // Don't use movshdup if it can be done with a shufps.
2419 /// isMOVSLDUPMask - Return true if the specified VECTOR_SHUFFLE operand
2420 /// specifies a shuffle of elements that is suitable for input to MOVSLDUP.
2421 bool X86::isMOVSLDUPMask(SDNode *N) {
2422 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2424 if (N->getNumOperands() != 4)
2427 // Expect 0, 0, 2, 2
2428 for (unsigned i = 0; i < 2; ++i) {
2429 SDOperand Arg = N->getOperand(i);
2430 if (Arg.getOpcode() == ISD::UNDEF) continue;
2431 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2432 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
2433 if (Val != 0) return false;
2437 for (unsigned i = 2; i < 4; ++i) {
2438 SDOperand Arg = N->getOperand(i);
2439 if (Arg.getOpcode() == ISD::UNDEF) continue;
2440 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2441 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
2442 if (Val != 2) return false;
2446 // Don't use movshdup if it can be done with a shufps.
2450 /// isIdentityMask - Return true if the specified VECTOR_SHUFFLE operand
2451 /// specifies a identity operation on the LHS or RHS.
2452 static bool isIdentityMask(SDNode *N, bool RHS = false) {
2453 unsigned NumElems = N->getNumOperands();
2454 for (unsigned i = 0; i < NumElems; ++i)
2455 if (!isUndefOrEqual(N->getOperand(i), i + (RHS ? NumElems : 0)))
2460 /// isSplatMask - Return true if the specified VECTOR_SHUFFLE operand specifies
2461 /// a splat of a single element.
2462 static bool isSplatMask(SDNode *N) {
2463 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2465 // This is a splat operation if each element of the permute is the same, and
2466 // if the value doesn't reference the second vector.
2467 unsigned NumElems = N->getNumOperands();
2468 SDOperand ElementBase;
2470 for (; i != NumElems; ++i) {
2471 SDOperand Elt = N->getOperand(i);
2472 if (isa<ConstantSDNode>(Elt)) {
2478 if (!ElementBase.Val)
2481 for (; i != NumElems; ++i) {
2482 SDOperand Arg = N->getOperand(i);
2483 if (Arg.getOpcode() == ISD::UNDEF) continue;
2484 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2485 if (Arg != ElementBase) return false;
2488 // Make sure it is a splat of the first vector operand.
2489 return cast<ConstantSDNode>(ElementBase)->getValue() < NumElems;
2492 /// isSplatMask - Return true if the specified VECTOR_SHUFFLE operand specifies
2493 /// a splat of a single element and it's a 2 or 4 element mask.
2494 bool X86::isSplatMask(SDNode *N) {
2495 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2497 // We can only splat 64-bit, and 32-bit quantities with a single instruction.
2498 if (N->getNumOperands() != 4 && N->getNumOperands() != 2)
2500 return ::isSplatMask(N);
2503 /// isSplatLoMask - Return true if the specified VECTOR_SHUFFLE operand
2504 /// specifies a splat of zero element.
2505 bool X86::isSplatLoMask(SDNode *N) {
2506 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2508 for (unsigned i = 0, e = N->getNumOperands(); i < e; ++i)
2509 if (!isUndefOrEqual(N->getOperand(i), 0))
2514 /// getShuffleSHUFImmediate - Return the appropriate immediate to shuffle
2515 /// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUF* and SHUFP*
2517 unsigned X86::getShuffleSHUFImmediate(SDNode *N) {
2518 unsigned NumOperands = N->getNumOperands();
2519 unsigned Shift = (NumOperands == 4) ? 2 : 1;
2521 for (unsigned i = 0; i < NumOperands; ++i) {
2523 SDOperand Arg = N->getOperand(NumOperands-i-1);
2524 if (Arg.getOpcode() != ISD::UNDEF)
2525 Val = cast<ConstantSDNode>(Arg)->getValue();
2526 if (Val >= NumOperands) Val -= NumOperands;
2528 if (i != NumOperands - 1)
2535 /// getShufflePSHUFHWImmediate - Return the appropriate immediate to shuffle
2536 /// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUFHW
2538 unsigned X86::getShufflePSHUFHWImmediate(SDNode *N) {
2540 // 8 nodes, but we only care about the last 4.
2541 for (unsigned i = 7; i >= 4; --i) {
2543 SDOperand Arg = N->getOperand(i);
2544 if (Arg.getOpcode() != ISD::UNDEF)
2545 Val = cast<ConstantSDNode>(Arg)->getValue();
2554 /// getShufflePSHUFLWImmediate - Return the appropriate immediate to shuffle
2555 /// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUFLW
2557 unsigned X86::getShufflePSHUFLWImmediate(SDNode *N) {
2559 // 8 nodes, but we only care about the first 4.
2560 for (int i = 3; i >= 0; --i) {
2562 SDOperand Arg = N->getOperand(i);
2563 if (Arg.getOpcode() != ISD::UNDEF)
2564 Val = cast<ConstantSDNode>(Arg)->getValue();
2573 /// isPSHUFHW_PSHUFLWMask - true if the specified VECTOR_SHUFFLE operand
2574 /// specifies a 8 element shuffle that can be broken into a pair of
2575 /// PSHUFHW and PSHUFLW.
2576 static bool isPSHUFHW_PSHUFLWMask(SDNode *N) {
2577 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2579 if (N->getNumOperands() != 8)
2582 // Lower quadword shuffled.
2583 for (unsigned i = 0; i != 4; ++i) {
2584 SDOperand Arg = N->getOperand(i);
2585 if (Arg.getOpcode() == ISD::UNDEF) continue;
2586 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2587 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
2592 // Upper quadword shuffled.
2593 for (unsigned i = 4; i != 8; ++i) {
2594 SDOperand Arg = N->getOperand(i);
2595 if (Arg.getOpcode() == ISD::UNDEF) continue;
2596 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2597 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
2598 if (Val < 4 || Val > 7)
2605 /// CommuteVectorShuffle - Swap vector_shuffle operands as well as
2606 /// values in ther permute mask.
2607 static SDOperand CommuteVectorShuffle(SDOperand Op, SDOperand &V1,
2608 SDOperand &V2, SDOperand &Mask,
2609 SelectionDAG &DAG) {
2610 MVT::ValueType VT = Op.getValueType();
2611 MVT::ValueType MaskVT = Mask.getValueType();
2612 MVT::ValueType EltVT = MVT::getVectorElementType(MaskVT);
2613 unsigned NumElems = Mask.getNumOperands();
2614 SmallVector<SDOperand, 8> MaskVec;
2616 for (unsigned i = 0; i != NumElems; ++i) {
2617 SDOperand Arg = Mask.getOperand(i);
2618 if (Arg.getOpcode() == ISD::UNDEF) {
2619 MaskVec.push_back(DAG.getNode(ISD::UNDEF, EltVT));
2622 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2623 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
2625 MaskVec.push_back(DAG.getConstant(Val + NumElems, EltVT));
2627 MaskVec.push_back(DAG.getConstant(Val - NumElems, EltVT));
2631 Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, &MaskVec[0], NumElems);
2632 return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, Mask);
2635 /// CommuteVectorShuffleMask - Change values in a shuffle permute mask assuming
2636 /// the two vector operands have swapped position.
2638 SDOperand CommuteVectorShuffleMask(SDOperand Mask, SelectionDAG &DAG) {
2639 MVT::ValueType MaskVT = Mask.getValueType();
2640 MVT::ValueType EltVT = MVT::getVectorElementType(MaskVT);
2641 unsigned NumElems = Mask.getNumOperands();
2642 SmallVector<SDOperand, 8> MaskVec;
2643 for (unsigned i = 0; i != NumElems; ++i) {
2644 SDOperand Arg = Mask.getOperand(i);
2645 if (Arg.getOpcode() == ISD::UNDEF) {
2646 MaskVec.push_back(DAG.getNode(ISD::UNDEF, EltVT));
2649 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2650 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
2652 MaskVec.push_back(DAG.getConstant(Val + NumElems, EltVT));
2654 MaskVec.push_back(DAG.getConstant(Val - NumElems, EltVT));
2656 return DAG.getNode(ISD::BUILD_VECTOR, MaskVT, &MaskVec[0], NumElems);
2660 /// ShouldXformToMOVHLPS - Return true if the node should be transformed to
2661 /// match movhlps. The lower half elements should come from upper half of
2662 /// V1 (and in order), and the upper half elements should come from the upper
2663 /// half of V2 (and in order).
2664 static bool ShouldXformToMOVHLPS(SDNode *Mask) {
2665 unsigned NumElems = Mask->getNumOperands();
2668 for (unsigned i = 0, e = 2; i != e; ++i)
2669 if (!isUndefOrEqual(Mask->getOperand(i), i+2))
2671 for (unsigned i = 2; i != 4; ++i)
2672 if (!isUndefOrEqual(Mask->getOperand(i), i+4))
2677 /// isScalarLoadToVector - Returns true if the node is a scalar load that
2678 /// is promoted to a vector.
2679 static inline bool isScalarLoadToVector(SDNode *N) {
2680 if (N->getOpcode() == ISD::SCALAR_TO_VECTOR) {
2681 N = N->getOperand(0).Val;
2682 return ISD::isNON_EXTLoad(N);
2687 /// ShouldXformToMOVLP{S|D} - Return true if the node should be transformed to
2688 /// match movlp{s|d}. The lower half elements should come from lower half of
2689 /// V1 (and in order), and the upper half elements should come from the upper
2690 /// half of V2 (and in order). And since V1 will become the source of the
2691 /// MOVLP, it must be either a vector load or a scalar load to vector.
2692 static bool ShouldXformToMOVLP(SDNode *V1, SDNode *V2, SDNode *Mask) {
2693 if (!ISD::isNON_EXTLoad(V1) && !isScalarLoadToVector(V1))
2695 // Is V2 is a vector load, don't do this transformation. We will try to use
2696 // load folding shufps op.
2697 if (ISD::isNON_EXTLoad(V2))
2700 unsigned NumElems = Mask->getNumOperands();
2701 if (NumElems != 2 && NumElems != 4)
2703 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
2704 if (!isUndefOrEqual(Mask->getOperand(i), i))
2706 for (unsigned i = NumElems/2; i != NumElems; ++i)
2707 if (!isUndefOrEqual(Mask->getOperand(i), i+NumElems))
2712 /// isSplatVector - Returns true if N is a BUILD_VECTOR node whose elements are
2714 static bool isSplatVector(SDNode *N) {
2715 if (N->getOpcode() != ISD::BUILD_VECTOR)
2718 SDOperand SplatValue = N->getOperand(0);
2719 for (unsigned i = 1, e = N->getNumOperands(); i != e; ++i)
2720 if (N->getOperand(i) != SplatValue)
2725 /// isUndefShuffle - Returns true if N is a VECTOR_SHUFFLE that can be resolved
2727 static bool isUndefShuffle(SDNode *N) {
2728 if (N->getOpcode() != ISD::VECTOR_SHUFFLE)
2731 SDOperand V1 = N->getOperand(0);
2732 SDOperand V2 = N->getOperand(1);
2733 SDOperand Mask = N->getOperand(2);
2734 unsigned NumElems = Mask.getNumOperands();
2735 for (unsigned i = 0; i != NumElems; ++i) {
2736 SDOperand Arg = Mask.getOperand(i);
2737 if (Arg.getOpcode() != ISD::UNDEF) {
2738 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
2739 if (Val < NumElems && V1.getOpcode() != ISD::UNDEF)
2741 else if (Val >= NumElems && V2.getOpcode() != ISD::UNDEF)
2748 /// isZeroNode - Returns true if Elt is a constant zero or a floating point
2750 static inline bool isZeroNode(SDOperand Elt) {
2751 return ((isa<ConstantSDNode>(Elt) &&
2752 cast<ConstantSDNode>(Elt)->getValue() == 0) ||
2753 (isa<ConstantFPSDNode>(Elt) &&
2754 cast<ConstantFPSDNode>(Elt)->getValueAPF().isPosZero()));
2757 /// isZeroShuffle - Returns true if N is a VECTOR_SHUFFLE that can be resolved
2758 /// to an zero vector.
2759 static bool isZeroShuffle(SDNode *N) {
2760 if (N->getOpcode() != ISD::VECTOR_SHUFFLE)
2763 SDOperand V1 = N->getOperand(0);
2764 SDOperand V2 = N->getOperand(1);
2765 SDOperand Mask = N->getOperand(2);
2766 unsigned NumElems = Mask.getNumOperands();
2767 for (unsigned i = 0; i != NumElems; ++i) {
2768 SDOperand Arg = Mask.getOperand(i);
2769 if (Arg.getOpcode() == ISD::UNDEF)
2772 unsigned Idx = cast<ConstantSDNode>(Arg)->getValue();
2773 if (Idx < NumElems) {
2774 unsigned Opc = V1.Val->getOpcode();
2775 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V1.Val))
2777 if (Opc != ISD::BUILD_VECTOR ||
2778 !isZeroNode(V1.Val->getOperand(Idx)))
2780 } else if (Idx >= NumElems) {
2781 unsigned Opc = V2.Val->getOpcode();
2782 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V2.Val))
2784 if (Opc != ISD::BUILD_VECTOR ||
2785 !isZeroNode(V2.Val->getOperand(Idx - NumElems)))
2792 /// getZeroVector - Returns a vector of specified type with all zero elements.
2794 static SDOperand getZeroVector(MVT::ValueType VT, SelectionDAG &DAG) {
2795 assert(MVT::isVector(VT) && "Expected a vector type");
2797 // Always build zero vectors as <4 x i32> or <2 x i32> bitcasted to their dest
2798 // type. This ensures they get CSE'd.
2799 SDOperand Cst = DAG.getTargetConstant(0, MVT::i32);
2801 if (MVT::getSizeInBits(VT) == 64) // MMX
2802 Vec = DAG.getNode(ISD::BUILD_VECTOR, MVT::v2i32, Cst, Cst);
2804 Vec = DAG.getNode(ISD::BUILD_VECTOR, MVT::v4i32, Cst, Cst, Cst, Cst);
2805 return DAG.getNode(ISD::BIT_CONVERT, VT, Vec);
2808 /// getOnesVector - Returns a vector of specified type with all bits set.
2810 static SDOperand getOnesVector(MVT::ValueType VT, SelectionDAG &DAG) {
2811 assert(MVT::isVector(VT) && "Expected a vector type");
2813 // Always build ones vectors as <4 x i32> or <2 x i32> bitcasted to their dest
2814 // type. This ensures they get CSE'd.
2815 SDOperand Cst = DAG.getTargetConstant(~0U, MVT::i32);
2817 if (MVT::getSizeInBits(VT) == 64) // MMX
2818 Vec = DAG.getNode(ISD::BUILD_VECTOR, MVT::v2i32, Cst, Cst);
2820 Vec = DAG.getNode(ISD::BUILD_VECTOR, MVT::v4i32, Cst, Cst, Cst, Cst);
2821 return DAG.getNode(ISD::BIT_CONVERT, VT, Vec);
2825 /// NormalizeMask - V2 is a splat, modify the mask (if needed) so all elements
2826 /// that point to V2 points to its first element.
2827 static SDOperand NormalizeMask(SDOperand Mask, SelectionDAG &DAG) {
2828 assert(Mask.getOpcode() == ISD::BUILD_VECTOR);
2830 bool Changed = false;
2831 SmallVector<SDOperand, 8> MaskVec;
2832 unsigned NumElems = Mask.getNumOperands();
2833 for (unsigned i = 0; i != NumElems; ++i) {
2834 SDOperand Arg = Mask.getOperand(i);
2835 if (Arg.getOpcode() != ISD::UNDEF) {
2836 unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
2837 if (Val > NumElems) {
2838 Arg = DAG.getConstant(NumElems, Arg.getValueType());
2842 MaskVec.push_back(Arg);
2846 Mask = DAG.getNode(ISD::BUILD_VECTOR, Mask.getValueType(),
2847 &MaskVec[0], MaskVec.size());
2851 /// getMOVLMask - Returns a vector_shuffle mask for an movs{s|d}, movd
2852 /// operation of specified width.
2853 static SDOperand getMOVLMask(unsigned NumElems, SelectionDAG &DAG) {
2854 MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
2855 MVT::ValueType BaseVT = MVT::getVectorElementType(MaskVT);
2857 SmallVector<SDOperand, 8> MaskVec;
2858 MaskVec.push_back(DAG.getConstant(NumElems, BaseVT));
2859 for (unsigned i = 1; i != NumElems; ++i)
2860 MaskVec.push_back(DAG.getConstant(i, BaseVT));
2861 return DAG.getNode(ISD::BUILD_VECTOR, MaskVT, &MaskVec[0], MaskVec.size());
2864 /// getUnpacklMask - Returns a vector_shuffle mask for an unpackl operation
2865 /// of specified width.
2866 static SDOperand getUnpacklMask(unsigned NumElems, SelectionDAG &DAG) {
2867 MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
2868 MVT::ValueType BaseVT = MVT::getVectorElementType(MaskVT);
2869 SmallVector<SDOperand, 8> MaskVec;
2870 for (unsigned i = 0, e = NumElems/2; i != e; ++i) {
2871 MaskVec.push_back(DAG.getConstant(i, BaseVT));
2872 MaskVec.push_back(DAG.getConstant(i + NumElems, BaseVT));
2874 return DAG.getNode(ISD::BUILD_VECTOR, MaskVT, &MaskVec[0], MaskVec.size());
2877 /// getUnpackhMask - Returns a vector_shuffle mask for an unpackh operation
2878 /// of specified width.
2879 static SDOperand getUnpackhMask(unsigned NumElems, SelectionDAG &DAG) {
2880 MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
2881 MVT::ValueType BaseVT = MVT::getVectorElementType(MaskVT);
2882 unsigned Half = NumElems/2;
2883 SmallVector<SDOperand, 8> MaskVec;
2884 for (unsigned i = 0; i != Half; ++i) {
2885 MaskVec.push_back(DAG.getConstant(i + Half, BaseVT));
2886 MaskVec.push_back(DAG.getConstant(i + NumElems + Half, BaseVT));
2888 return DAG.getNode(ISD::BUILD_VECTOR, MaskVT, &MaskVec[0], MaskVec.size());
2891 /// PromoteSplat - Promote a splat of v8i16 or v16i8 to v4i32.
2893 static SDOperand PromoteSplat(SDOperand Op, SelectionDAG &DAG) {
2894 SDOperand V1 = Op.getOperand(0);
2895 SDOperand Mask = Op.getOperand(2);
2896 MVT::ValueType VT = Op.getValueType();
2897 unsigned NumElems = Mask.getNumOperands();
2898 Mask = getUnpacklMask(NumElems, DAG);
2899 while (NumElems != 4) {
2900 V1 = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V1, Mask);
2903 V1 = DAG.getNode(ISD::BIT_CONVERT, MVT::v4i32, V1);
2905 Mask = getZeroVector(MVT::v4i32, DAG);
2906 SDOperand Shuffle = DAG.getNode(ISD::VECTOR_SHUFFLE, MVT::v4i32, V1,
2907 DAG.getNode(ISD::UNDEF, MVT::v4i32), Mask);
2908 return DAG.getNode(ISD::BIT_CONVERT, VT, Shuffle);
2911 /// getShuffleVectorZeroOrUndef - Return a vector_shuffle of the specified
2912 /// vector of zero or undef vector. This produces a shuffle where the low
2913 /// element of V2 is swizzled into the zero/undef vector, landing at element
2914 /// Idx. This produces a shuffle mask like 4,1,2,3 (idx=0) or 0,1,2,4 (idx=3).
2915 static SDOperand getShuffleVectorZeroOrUndef(SDOperand V2, MVT::ValueType VT,
2916 unsigned NumElems, unsigned Idx,
2917 bool isZero, SelectionDAG &DAG) {
2918 SDOperand V1 = isZero ? getZeroVector(VT, DAG) : DAG.getNode(ISD::UNDEF, VT);
2919 MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
2920 MVT::ValueType EVT = MVT::getVectorElementType(MaskVT);
2921 SmallVector<SDOperand, 16> MaskVec;
2922 for (unsigned i = 0; i != NumElems; ++i)
2923 if (i == Idx) // If this is the insertion idx, put the low elt of V2 here.
2924 MaskVec.push_back(DAG.getConstant(NumElems, EVT));
2926 MaskVec.push_back(DAG.getConstant(i, EVT));
2927 SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
2928 &MaskVec[0], MaskVec.size());
2929 return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, Mask);
2932 /// LowerBuildVectorv16i8 - Custom lower build_vector of v16i8.
2934 static SDOperand LowerBuildVectorv16i8(SDOperand Op, unsigned NonZeros,
2935 unsigned NumNonZero, unsigned NumZero,
2936 SelectionDAG &DAG, TargetLowering &TLI) {
2942 for (unsigned i = 0; i < 16; ++i) {
2943 bool ThisIsNonZero = (NonZeros & (1 << i)) != 0;
2944 if (ThisIsNonZero && First) {
2946 V = getZeroVector(MVT::v8i16, DAG);
2948 V = DAG.getNode(ISD::UNDEF, MVT::v8i16);
2953 SDOperand ThisElt(0, 0), LastElt(0, 0);
2954 bool LastIsNonZero = (NonZeros & (1 << (i-1))) != 0;
2955 if (LastIsNonZero) {
2956 LastElt = DAG.getNode(ISD::ZERO_EXTEND, MVT::i16, Op.getOperand(i-1));
2958 if (ThisIsNonZero) {
2959 ThisElt = DAG.getNode(ISD::ZERO_EXTEND, MVT::i16, Op.getOperand(i));
2960 ThisElt = DAG.getNode(ISD::SHL, MVT::i16,
2961 ThisElt, DAG.getConstant(8, MVT::i8));
2963 ThisElt = DAG.getNode(ISD::OR, MVT::i16, ThisElt, LastElt);
2968 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, MVT::v8i16, V, ThisElt,
2969 DAG.getIntPtrConstant(i/2));
2973 return DAG.getNode(ISD::BIT_CONVERT, MVT::v16i8, V);
2976 /// LowerBuildVectorv8i16 - Custom lower build_vector of v8i16.
2978 static SDOperand LowerBuildVectorv8i16(SDOperand Op, unsigned NonZeros,
2979 unsigned NumNonZero, unsigned NumZero,
2980 SelectionDAG &DAG, TargetLowering &TLI) {
2986 for (unsigned i = 0; i < 8; ++i) {
2987 bool isNonZero = (NonZeros & (1 << i)) != 0;
2991 V = getZeroVector(MVT::v8i16, DAG);
2993 V = DAG.getNode(ISD::UNDEF, MVT::v8i16);
2996 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, MVT::v8i16, V, Op.getOperand(i),
2997 DAG.getIntPtrConstant(i));
3005 X86TargetLowering::LowerBUILD_VECTOR(SDOperand Op, SelectionDAG &DAG) {
3006 // All zero's are handled with pxor, all one's are handled with pcmpeqd.
3007 if (ISD::isBuildVectorAllZeros(Op.Val) || ISD::isBuildVectorAllOnes(Op.Val)) {
3008 // Canonicalize this to either <4 x i32> or <2 x i32> (SSE vs MMX) to
3009 // 1) ensure the zero vectors are CSE'd, and 2) ensure that i64 scalars are
3010 // eliminated on x86-32 hosts.
3011 if (Op.getValueType() == MVT::v4i32 || Op.getValueType() == MVT::v2i32)
3014 if (ISD::isBuildVectorAllOnes(Op.Val))
3015 return getOnesVector(Op.getValueType(), DAG);
3016 return getZeroVector(Op.getValueType(), DAG);
3019 MVT::ValueType VT = Op.getValueType();
3020 MVT::ValueType EVT = MVT::getVectorElementType(VT);
3021 unsigned EVTBits = MVT::getSizeInBits(EVT);
3023 unsigned NumElems = Op.getNumOperands();
3024 unsigned NumZero = 0;
3025 unsigned NumNonZero = 0;
3026 unsigned NonZeros = 0;
3027 bool HasNonImms = false;
3028 SmallSet<SDOperand, 8> Values;
3029 for (unsigned i = 0; i < NumElems; ++i) {
3030 SDOperand Elt = Op.getOperand(i);
3031 if (Elt.getOpcode() == ISD::UNDEF)
3034 if (Elt.getOpcode() != ISD::Constant &&
3035 Elt.getOpcode() != ISD::ConstantFP)
3037 if (isZeroNode(Elt))
3040 NonZeros |= (1 << i);
3045 if (NumNonZero == 0) {
3046 // All undef vector. Return an UNDEF. All zero vectors were handled above.
3047 return DAG.getNode(ISD::UNDEF, VT);
3050 // Splat is obviously ok. Let legalizer expand it to a shuffle.
3051 if (Values.size() == 1)
3054 // Special case for single non-zero element.
3055 if (NumNonZero == 1 && NumElems <= 4) {
3056 unsigned Idx = CountTrailingZeros_32(NonZeros);
3057 SDOperand Item = Op.getOperand(Idx);
3058 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, VT, Item);
3060 // Turn it into a MOVL (i.e. movss, movsd, or movd) to a zero vector.
3061 return getShuffleVectorZeroOrUndef(Item, VT, NumElems, Idx,
3063 else if (!HasNonImms) // Otherwise, it's better to do a constpool load.
3066 if (EVTBits == 32) {
3067 // Turn it into a shuffle of zero and zero-extended scalar to vector.
3068 Item = getShuffleVectorZeroOrUndef(Item, VT, NumElems, 0, NumZero > 0,
3070 MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
3071 MVT::ValueType MaskEVT = MVT::getVectorElementType(MaskVT);
3072 SmallVector<SDOperand, 8> MaskVec;
3073 for (unsigned i = 0; i < NumElems; i++)
3074 MaskVec.push_back(DAG.getConstant((i == Idx) ? 0 : 1, MaskEVT));
3075 SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
3076 &MaskVec[0], MaskVec.size());
3077 return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, Item,
3078 DAG.getNode(ISD::UNDEF, VT), Mask);
3082 // A vector full of immediates; various special cases are already
3083 // handled, so this is best done with a single constant-pool load.
3087 // Let legalizer expand 2-wide build_vectors.
3091 // If element VT is < 32 bits, convert it to inserts into a zero vector.
3092 if (EVTBits == 8 && NumElems == 16) {
3093 SDOperand V = LowerBuildVectorv16i8(Op, NonZeros,NumNonZero,NumZero, DAG,
3095 if (V.Val) return V;
3098 if (EVTBits == 16 && NumElems == 8) {
3099 SDOperand V = LowerBuildVectorv8i16(Op, NonZeros,NumNonZero,NumZero, DAG,
3101 if (V.Val) return V;
3104 // If element VT is == 32 bits, turn it into a number of shuffles.
3105 SmallVector<SDOperand, 8> V;
3107 if (NumElems == 4 && NumZero > 0) {
3108 for (unsigned i = 0; i < 4; ++i) {
3109 bool isZero = !(NonZeros & (1 << i));
3111 V[i] = getZeroVector(VT, DAG);
3113 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, VT, Op.getOperand(i));
3116 for (unsigned i = 0; i < 2; ++i) {
3117 switch ((NonZeros & (0x3 << i*2)) >> (i*2)) {
3120 V[i] = V[i*2]; // Must be a zero vector.
3123 V[i] = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V[i*2+1], V[i*2],
3124 getMOVLMask(NumElems, DAG));
3127 V[i] = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V[i*2], V[i*2+1],
3128 getMOVLMask(NumElems, DAG));
3131 V[i] = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V[i*2], V[i*2+1],
3132 getUnpacklMask(NumElems, DAG));
3137 // Take advantage of the fact GR32 to VR128 scalar_to_vector (i.e. movd)
3138 // clears the upper bits.
3139 // FIXME: we can do the same for v4f32 case when we know both parts of
3140 // the lower half come from scalar_to_vector (loadf32). We should do
3141 // that in post legalizer dag combiner with target specific hooks.
3142 if (MVT::isInteger(EVT) && (NonZeros & (0x3 << 2)) == 0)
3144 MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
3145 MVT::ValueType EVT = MVT::getVectorElementType(MaskVT);
3146 SmallVector<SDOperand, 8> MaskVec;
3147 bool Reverse = (NonZeros & 0x3) == 2;
3148 for (unsigned i = 0; i < 2; ++i)
3150 MaskVec.push_back(DAG.getConstant(1-i, EVT));
3152 MaskVec.push_back(DAG.getConstant(i, EVT));
3153 Reverse = ((NonZeros & (0x3 << 2)) >> 2) == 2;
3154 for (unsigned i = 0; i < 2; ++i)
3156 MaskVec.push_back(DAG.getConstant(1-i+NumElems, EVT));
3158 MaskVec.push_back(DAG.getConstant(i+NumElems, EVT));
3159 SDOperand ShufMask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
3160 &MaskVec[0], MaskVec.size());
3161 return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V[0], V[1], ShufMask);
3164 if (Values.size() > 2) {
3165 // Expand into a number of unpckl*.
3167 // Step 1: unpcklps 0, 2 ==> X: <?, ?, 2, 0>
3168 // : unpcklps 1, 3 ==> Y: <?, ?, 3, 1>
3169 // Step 2: unpcklps X, Y ==> <3, 2, 1, 0>
3170 SDOperand UnpckMask = getUnpacklMask(NumElems, DAG);
3171 for (unsigned i = 0; i < NumElems; ++i)
3172 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, VT, Op.getOperand(i));
3174 while (NumElems != 0) {
3175 for (unsigned i = 0; i < NumElems; ++i)
3176 V[i] = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V[i], V[i + NumElems],
3187 SDOperand LowerVECTOR_SHUFFLEv8i16(SDOperand V1, SDOperand V2,
3188 SDOperand PermMask, SelectionDAG &DAG,
3189 TargetLowering &TLI) {
3191 MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(8);
3192 MVT::ValueType MaskEVT = MVT::getVectorElementType(MaskVT);
3193 MVT::ValueType PtrVT = TLI.getPointerTy();
3194 SmallVector<SDOperand, 8> MaskElts(PermMask.Val->op_begin(),
3195 PermMask.Val->op_end());
3197 // First record which half of which vector the low elements come from.
3198 SmallVector<unsigned, 4> LowQuad(4);
3199 for (unsigned i = 0; i < 4; ++i) {
3200 SDOperand Elt = MaskElts[i];
3201 if (Elt.getOpcode() == ISD::UNDEF)
3203 unsigned EltIdx = cast<ConstantSDNode>(Elt)->getValue();
3204 int QuadIdx = EltIdx / 4;
3207 int BestLowQuad = -1;
3208 unsigned MaxQuad = 1;
3209 for (unsigned i = 0; i < 4; ++i) {
3210 if (LowQuad[i] > MaxQuad) {
3212 MaxQuad = LowQuad[i];
3216 // Record which half of which vector the high elements come from.
3217 SmallVector<unsigned, 4> HighQuad(4);
3218 for (unsigned i = 4; i < 8; ++i) {
3219 SDOperand Elt = MaskElts[i];
3220 if (Elt.getOpcode() == ISD::UNDEF)
3222 unsigned EltIdx = cast<ConstantSDNode>(Elt)->getValue();
3223 int QuadIdx = EltIdx / 4;
3224 ++HighQuad[QuadIdx];
3226 int BestHighQuad = -1;
3228 for (unsigned i = 0; i < 4; ++i) {
3229 if (HighQuad[i] > MaxQuad) {
3231 MaxQuad = HighQuad[i];
3235 // If it's possible to sort parts of either half with PSHUF{H|L}W, then do it.
3236 if (BestLowQuad != -1 || BestHighQuad != -1) {
3237 // First sort the 4 chunks in order using shufpd.
3238 SmallVector<SDOperand, 8> MaskVec;
3239 if (BestLowQuad != -1)
3240 MaskVec.push_back(DAG.getConstant(BestLowQuad, MVT::i32));
3242 MaskVec.push_back(DAG.getConstant(0, MVT::i32));
3243 if (BestHighQuad != -1)
3244 MaskVec.push_back(DAG.getConstant(BestHighQuad, MVT::i32));
3246 MaskVec.push_back(DAG.getConstant(1, MVT::i32));
3247 SDOperand Mask= DAG.getNode(ISD::BUILD_VECTOR, MVT::v2i32, &MaskVec[0],2);
3248 NewV = DAG.getNode(ISD::VECTOR_SHUFFLE, MVT::v2i64,
3249 DAG.getNode(ISD::BIT_CONVERT, MVT::v2i64, V1),
3250 DAG.getNode(ISD::BIT_CONVERT, MVT::v2i64, V2), Mask);
3251 NewV = DAG.getNode(ISD::BIT_CONVERT, MVT::v8i16, NewV);
3253 // Now sort high and low parts separately.
3254 BitVector InOrder(8);
3255 if (BestLowQuad != -1) {
3256 // Sort lower half in order using PSHUFLW.
3258 bool AnyOutOrder = false;
3259 for (unsigned i = 0; i != 4; ++i) {
3260 SDOperand Elt = MaskElts[i];
3261 if (Elt.getOpcode() == ISD::UNDEF) {
3262 MaskVec.push_back(Elt);
3265 unsigned EltIdx = cast<ConstantSDNode>(Elt)->getValue();
3268 MaskVec.push_back(DAG.getConstant(EltIdx % 4, MaskEVT));
3269 // If this element is in the right place after this shuffle, then
3271 if ((int)(EltIdx / 4) == BestLowQuad)
3276 for (unsigned i = 4; i != 8; ++i)
3277 MaskVec.push_back(DAG.getConstant(i, MaskEVT));
3278 SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, &MaskVec[0], 8);
3279 NewV = DAG.getNode(ISD::VECTOR_SHUFFLE, MVT::v8i16, NewV, NewV, Mask);
3283 if (BestHighQuad != -1) {
3284 // Sort high half in order using PSHUFHW if possible.
3286 for (unsigned i = 0; i != 4; ++i)
3287 MaskVec.push_back(DAG.getConstant(i, MaskEVT));
3288 bool AnyOutOrder = false;
3289 for (unsigned i = 4; i != 8; ++i) {
3290 SDOperand Elt = MaskElts[i];
3291 if (Elt.getOpcode() == ISD::UNDEF) {
3292 MaskVec.push_back(Elt);
3295 unsigned EltIdx = cast<ConstantSDNode>(Elt)->getValue();
3298 MaskVec.push_back(DAG.getConstant((EltIdx % 4) + 4, MaskEVT));
3299 // If this element is in the right place after this shuffle, then
3301 if ((int)(EltIdx / 4) == BestHighQuad)
3306 SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, &MaskVec[0], 8);
3307 NewV = DAG.getNode(ISD::VECTOR_SHUFFLE, MVT::v8i16, NewV, NewV, Mask);
3311 // The other elements are put in the right place using pextrw and pinsrw.
3312 for (unsigned i = 0; i != 8; ++i) {
3315 SDOperand Elt = MaskElts[i];
3316 unsigned EltIdx = cast<ConstantSDNode>(Elt)->getValue();
3319 SDOperand ExtOp = (EltIdx < 8)
3320 ? DAG.getNode(ISD::EXTRACT_VECTOR_ELT, MVT::i16, V1,
3321 DAG.getConstant(EltIdx, PtrVT))
3322 : DAG.getNode(ISD::EXTRACT_VECTOR_ELT, MVT::i16, V2,
3323 DAG.getConstant(EltIdx - 8, PtrVT));
3324 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, MVT::v8i16, NewV, ExtOp,
3325 DAG.getConstant(i, PtrVT));
3330 // PSHUF{H|L}W are not used. Lower into extracts and inserts but try to use
3331 ///as few as possible.
3332 // First, let's find out how many elements are already in the right order.
3333 unsigned V1InOrder = 0;
3334 unsigned V1FromV1 = 0;
3335 unsigned V2InOrder = 0;
3336 unsigned V2FromV2 = 0;
3337 SmallVector<SDOperand, 8> V1Elts;
3338 SmallVector<SDOperand, 8> V2Elts;
3339 for (unsigned i = 0; i < 8; ++i) {
3340 SDOperand Elt = MaskElts[i];
3341 if (Elt.getOpcode() == ISD::UNDEF) {
3342 V1Elts.push_back(Elt);
3343 V2Elts.push_back(Elt);
3348 unsigned EltIdx = cast<ConstantSDNode>(Elt)->getValue();
3350 V1Elts.push_back(Elt);
3351 V2Elts.push_back(DAG.getConstant(i+8, MaskEVT));
3353 } else if (EltIdx == i+8) {
3354 V1Elts.push_back(Elt);
3355 V2Elts.push_back(DAG.getConstant(i, MaskEVT));
3357 } else if (EltIdx < 8) {
3358 V1Elts.push_back(Elt);
3361 V2Elts.push_back(DAG.getConstant(EltIdx-8, MaskEVT));
3366 if (V2InOrder > V1InOrder) {
3367 PermMask = CommuteVectorShuffleMask(PermMask, DAG);
3369 std::swap(V1Elts, V2Elts);
3370 std::swap(V1FromV1, V2FromV2);
3373 if ((V1FromV1 + V1InOrder) != 8) {
3374 // Some elements are from V2.
3376 // If there are elements that are from V1 but out of place,
3377 // then first sort them in place
3378 SmallVector<SDOperand, 8> MaskVec;
3379 for (unsigned i = 0; i < 8; ++i) {
3380 SDOperand Elt = V1Elts[i];
3381 if (Elt.getOpcode() == ISD::UNDEF) {
3382 MaskVec.push_back(DAG.getNode(ISD::UNDEF, MaskEVT));
3385 unsigned EltIdx = cast<ConstantSDNode>(Elt)->getValue();
3387 MaskVec.push_back(DAG.getNode(ISD::UNDEF, MaskEVT));
3389 MaskVec.push_back(DAG.getConstant(EltIdx, MaskEVT));
3391 SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, &MaskVec[0], 8);
3392 V1 = DAG.getNode(ISD::VECTOR_SHUFFLE, MVT::v8i16, V1, V1, Mask);
3396 for (unsigned i = 0; i < 8; ++i) {
3397 SDOperand Elt = V1Elts[i];
3398 if (Elt.getOpcode() == ISD::UNDEF)
3400 unsigned EltIdx = cast<ConstantSDNode>(Elt)->getValue();
3403 SDOperand ExtOp = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, MVT::i16, V2,
3404 DAG.getConstant(EltIdx - 8, PtrVT));
3405 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, MVT::v8i16, NewV, ExtOp,
3406 DAG.getConstant(i, PtrVT));
3410 // All elements are from V1.
3412 for (unsigned i = 0; i < 8; ++i) {
3413 SDOperand Elt = V1Elts[i];
3414 if (Elt.getOpcode() == ISD::UNDEF)
3416 unsigned EltIdx = cast<ConstantSDNode>(Elt)->getValue();
3417 SDOperand ExtOp = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, MVT::i16, V1,
3418 DAG.getConstant(EltIdx, PtrVT));
3419 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, MVT::v8i16, NewV, ExtOp,
3420 DAG.getConstant(i, PtrVT));
3426 /// RewriteAsNarrowerShuffle - Try rewriting v8i16 and v16i8 shuffles as 4 wide
3427 /// ones, or rewriting v4i32 / v2f32 as 2 wide ones if possible. This can be
3428 /// done when every pair / quad of shuffle mask elements point to elements in
3429 /// the right sequence. e.g.
3430 /// vector_shuffle <>, <>, < 3, 4, | 10, 11, | 0, 1, | 14, 15>
3432 SDOperand RewriteAsNarrowerShuffle(SDOperand V1, SDOperand V2,
3434 SDOperand PermMask, SelectionDAG &DAG,
3435 TargetLowering &TLI) {
3436 unsigned NumElems = PermMask.getNumOperands();
3437 unsigned NewWidth = (NumElems == 4) ? 2 : 4;
3438 MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NewWidth);
3439 MVT::ValueType NewVT = MaskVT;
3441 case MVT::v4f32: NewVT = MVT::v2f64; break;
3442 case MVT::v4i32: NewVT = MVT::v2i64; break;
3443 case MVT::v8i16: NewVT = MVT::v4i32; break;
3444 case MVT::v16i8: NewVT = MVT::v4i32; break;
3445 default: assert(false && "Unexpected!");
3448 if (NewWidth == 2) {
3449 if (MVT::isInteger(VT))
3454 unsigned Scale = NumElems / NewWidth;
3455 SmallVector<SDOperand, 8> MaskVec;
3456 for (unsigned i = 0; i < NumElems; i += Scale) {
3457 unsigned StartIdx = ~0U;
3458 for (unsigned j = 0; j < Scale; ++j) {
3459 SDOperand Elt = PermMask.getOperand(i+j);
3460 if (Elt.getOpcode() == ISD::UNDEF)
3462 unsigned EltIdx = cast<ConstantSDNode>(Elt)->getValue();
3463 if (StartIdx == ~0U)
3464 StartIdx = EltIdx - (EltIdx % Scale);
3465 if (EltIdx != StartIdx + j)
3468 if (StartIdx == ~0U)
3469 MaskVec.push_back(DAG.getNode(ISD::UNDEF, MVT::i32));
3471 MaskVec.push_back(DAG.getConstant(StartIdx / Scale, MVT::i32));
3474 V1 = DAG.getNode(ISD::BIT_CONVERT, NewVT, V1);
3475 V2 = DAG.getNode(ISD::BIT_CONVERT, NewVT, V2);
3476 return DAG.getNode(ISD::VECTOR_SHUFFLE, NewVT, V1, V2,
3477 DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
3478 &MaskVec[0], MaskVec.size()));
3482 X86TargetLowering::LowerVECTOR_SHUFFLE(SDOperand Op, SelectionDAG &DAG) {
3483 SDOperand V1 = Op.getOperand(0);
3484 SDOperand V2 = Op.getOperand(1);
3485 SDOperand PermMask = Op.getOperand(2);
3486 MVT::ValueType VT = Op.getValueType();
3487 unsigned NumElems = PermMask.getNumOperands();
3488 bool V1IsUndef = V1.getOpcode() == ISD::UNDEF;
3489 bool V2IsUndef = V2.getOpcode() == ISD::UNDEF;
3490 bool V1IsSplat = false;
3491 bool V2IsSplat = false;
3493 if (isUndefShuffle(Op.Val))
3494 return DAG.getNode(ISD::UNDEF, VT);
3496 if (isZeroShuffle(Op.Val))
3497 return getZeroVector(VT, DAG);
3499 if (isIdentityMask(PermMask.Val))
3501 else if (isIdentityMask(PermMask.Val, true))
3504 if (isSplatMask(PermMask.Val)) {
3505 if (NumElems <= 4) return Op;
3506 // Promote it to a v4i32 splat.
3507 return PromoteSplat(Op, DAG);
3510 // If the shuffle can be profitably rewritten as a narrower shuffle, then
3512 if (VT == MVT::v8i16 || VT == MVT::v16i8) {
3513 SDOperand NewOp= RewriteAsNarrowerShuffle(V1, V2, VT, PermMask, DAG, *this);
3515 return DAG.getNode(ISD::BIT_CONVERT, VT, LowerVECTOR_SHUFFLE(NewOp, DAG));
3516 } else if ((VT == MVT::v4i32 || (VT == MVT::v4f32 && Subtarget->hasSSE2()))) {
3517 // FIXME: Figure out a cleaner way to do this.
3518 // Try to make use of movq to zero out the top part.
3519 if (ISD::isBuildVectorAllZeros(V2.Val)) {
3520 SDOperand NewOp = RewriteAsNarrowerShuffle(V1, V2, VT, PermMask, DAG, *this);
3522 SDOperand NewV1 = NewOp.getOperand(0);
3523 SDOperand NewV2 = NewOp.getOperand(1);
3524 SDOperand NewMask = NewOp.getOperand(2);
3525 if (isCommutedMOVL(NewMask.Val, true, false)) {
3526 NewOp = CommuteVectorShuffle(NewOp, NewV1, NewV2, NewMask, DAG);
3527 NewOp = DAG.getNode(ISD::VECTOR_SHUFFLE, NewOp.getValueType(),
3528 NewV1, NewV2, getMOVLMask(2, DAG));
3529 return DAG.getNode(ISD::BIT_CONVERT, VT, LowerVECTOR_SHUFFLE(NewOp, DAG));
3532 } else if (ISD::isBuildVectorAllZeros(V1.Val)) {
3533 SDOperand NewOp= RewriteAsNarrowerShuffle(V1, V2, VT, PermMask, DAG, *this);
3534 if (NewOp.Val && X86::isMOVLMask(NewOp.getOperand(2).Val))
3535 return DAG.getNode(ISD::BIT_CONVERT, VT, LowerVECTOR_SHUFFLE(NewOp, DAG));
3539 if (X86::isMOVLMask(PermMask.Val))
3540 return (V1IsUndef) ? V2 : Op;
3542 if (X86::isMOVSHDUPMask(PermMask.Val) ||
3543 X86::isMOVSLDUPMask(PermMask.Val) ||
3544 X86::isMOVHLPSMask(PermMask.Val) ||
3545 X86::isMOVHPMask(PermMask.Val) ||
3546 X86::isMOVLPMask(PermMask.Val))
3549 if (ShouldXformToMOVHLPS(PermMask.Val) ||
3550 ShouldXformToMOVLP(V1.Val, V2.Val, PermMask.Val))
3551 return CommuteVectorShuffle(Op, V1, V2, PermMask, DAG);
3553 bool Commuted = false;
3554 // FIXME: This should also accept a bitcast of a splat? Be careful, not
3555 // 1,1,1,1 -> v8i16 though.
3556 V1IsSplat = isSplatVector(V1.Val);
3557 V2IsSplat = isSplatVector(V2.Val);
3559 // Canonicalize the splat or undef, if present, to be on the RHS.
3560 if ((V1IsSplat || V1IsUndef) && !(V2IsSplat || V2IsUndef)) {
3561 Op = CommuteVectorShuffle(Op, V1, V2, PermMask, DAG);
3562 std::swap(V1IsSplat, V2IsSplat);
3563 std::swap(V1IsUndef, V2IsUndef);
3567 // FIXME: Figure out a cleaner way to do this.
3568 if (isCommutedMOVL(PermMask.Val, V2IsSplat, V2IsUndef)) {
3569 if (V2IsUndef) return V1;
3570 Op = CommuteVectorShuffle(Op, V1, V2, PermMask, DAG);
3572 // V2 is a splat, so the mask may be malformed. That is, it may point
3573 // to any V2 element. The instruction selectior won't like this. Get
3574 // a corrected mask and commute to form a proper MOVS{S|D}.
3575 SDOperand NewMask = getMOVLMask(NumElems, DAG);
3576 if (NewMask.Val != PermMask.Val)
3577 Op = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, NewMask);
3582 if (X86::isUNPCKL_v_undef_Mask(PermMask.Val) ||
3583 X86::isUNPCKH_v_undef_Mask(PermMask.Val) ||
3584 X86::isUNPCKLMask(PermMask.Val) ||
3585 X86::isUNPCKHMask(PermMask.Val))
3589 // Normalize mask so all entries that point to V2 points to its first
3590 // element then try to match unpck{h|l} again. If match, return a
3591 // new vector_shuffle with the corrected mask.
3592 SDOperand NewMask = NormalizeMask(PermMask, DAG);
3593 if (NewMask.Val != PermMask.Val) {
3594 if (X86::isUNPCKLMask(PermMask.Val, true)) {
3595 SDOperand NewMask = getUnpacklMask(NumElems, DAG);
3596 return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, NewMask);
3597 } else if (X86::isUNPCKHMask(PermMask.Val, true)) {
3598 SDOperand NewMask = getUnpackhMask(NumElems, DAG);
3599 return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, NewMask);
3604 // Normalize the node to match x86 shuffle ops if needed
3605 if (V2.getOpcode() != ISD::UNDEF && isCommutedSHUFP(PermMask.Val))
3606 Op = CommuteVectorShuffle(Op, V1, V2, PermMask, DAG);
3609 // Commute is back and try unpck* again.
3610 Op = CommuteVectorShuffle(Op, V1, V2, PermMask, DAG);
3611 if (X86::isUNPCKL_v_undef_Mask(PermMask.Val) ||
3612 X86::isUNPCKH_v_undef_Mask(PermMask.Val) ||
3613 X86::isUNPCKLMask(PermMask.Val) ||
3614 X86::isUNPCKHMask(PermMask.Val))
3618 // If VT is integer, try PSHUF* first, then SHUFP*.
3619 if (MVT::isInteger(VT)) {
3620 // MMX doesn't have PSHUFD; it does have PSHUFW. While it's theoretically
3621 // possible to shuffle a v2i32 using PSHUFW, that's not yet implemented.
3622 if (((MVT::getSizeInBits(VT) != 64 || NumElems == 4) &&
3623 X86::isPSHUFDMask(PermMask.Val)) ||
3624 X86::isPSHUFHWMask(PermMask.Val) ||
3625 X86::isPSHUFLWMask(PermMask.Val)) {
3626 if (V2.getOpcode() != ISD::UNDEF)
3627 return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1,
3628 DAG.getNode(ISD::UNDEF, V1.getValueType()),PermMask);
3632 if (X86::isSHUFPMask(PermMask.Val) &&
3633 MVT::getSizeInBits(VT) != 64) // Don't do this for MMX.
3636 // Floating point cases in the other order.
3637 if (X86::isSHUFPMask(PermMask.Val))
3639 if (X86::isPSHUFDMask(PermMask.Val) ||
3640 X86::isPSHUFHWMask(PermMask.Val) ||
3641 X86::isPSHUFLWMask(PermMask.Val)) {
3642 if (V2.getOpcode() != ISD::UNDEF)
3643 return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1,
3644 DAG.getNode(ISD::UNDEF, V1.getValueType()),PermMask);
3649 // Handle v8i16 specifically since SSE can do byte extraction and insertion.
3650 if (VT == MVT::v8i16) {
3651 SDOperand NewOp = LowerVECTOR_SHUFFLEv8i16(V1, V2, PermMask, DAG, *this);
3656 // Handle all 4 wide cases with a number of shuffles.
3657 if (NumElems == 4 && MVT::getSizeInBits(VT) != 64) {
3658 // Don't do this for MMX.
3659 MVT::ValueType MaskVT = PermMask.getValueType();
3660 MVT::ValueType MaskEVT = MVT::getVectorElementType(MaskVT);
3661 SmallVector<std::pair<int, int>, 8> Locs;
3662 Locs.reserve(NumElems);
3663 SmallVector<SDOperand, 8> Mask1(NumElems,
3664 DAG.getNode(ISD::UNDEF, MaskEVT));
3665 SmallVector<SDOperand, 8> Mask2(NumElems,
3666 DAG.getNode(ISD::UNDEF, MaskEVT));
3669 // If no more than two elements come from either vector. This can be
3670 // implemented with two shuffles. First shuffle gather the elements.
3671 // The second shuffle, which takes the first shuffle as both of its
3672 // vector operands, put the elements into the right order.
3673 for (unsigned i = 0; i != NumElems; ++i) {
3674 SDOperand Elt = PermMask.getOperand(i);
3675 if (Elt.getOpcode() == ISD::UNDEF) {
3676 Locs[i] = std::make_pair(-1, -1);
3678 unsigned Val = cast<ConstantSDNode>(Elt)->getValue();
3679 if (Val < NumElems) {
3680 Locs[i] = std::make_pair(0, NumLo);
3684 Locs[i] = std::make_pair(1, NumHi);
3685 if (2+NumHi < NumElems)
3686 Mask1[2+NumHi] = Elt;
3691 if (NumLo <= 2 && NumHi <= 2) {
3692 V1 = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2,
3693 DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
3694 &Mask1[0], Mask1.size()));
3695 for (unsigned i = 0; i != NumElems; ++i) {
3696 if (Locs[i].first == -1)
3699 unsigned Idx = (i < NumElems/2) ? 0 : NumElems;
3700 Idx += Locs[i].first * (NumElems/2) + Locs[i].second;
3701 Mask2[i] = DAG.getConstant(Idx, MaskEVT);
3705 return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V1,
3706 DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
3707 &Mask2[0], Mask2.size()));
3710 // Break it into (shuffle shuffle_hi, shuffle_lo).
3712 SmallVector<SDOperand,8> LoMask(NumElems, DAG.getNode(ISD::UNDEF, MaskEVT));
3713 SmallVector<SDOperand,8> HiMask(NumElems, DAG.getNode(ISD::UNDEF, MaskEVT));
3714 SmallVector<SDOperand,8> *MaskPtr = &LoMask;
3715 unsigned MaskIdx = 0;
3717 unsigned HiIdx = NumElems/2;
3718 for (unsigned i = 0; i != NumElems; ++i) {
3719 if (i == NumElems/2) {
3725 SDOperand Elt = PermMask.getOperand(i);
3726 if (Elt.getOpcode() == ISD::UNDEF) {
3727 Locs[i] = std::make_pair(-1, -1);
3728 } else if (cast<ConstantSDNode>(Elt)->getValue() < NumElems) {
3729 Locs[i] = std::make_pair(MaskIdx, LoIdx);
3730 (*MaskPtr)[LoIdx] = Elt;
3733 Locs[i] = std::make_pair(MaskIdx, HiIdx);
3734 (*MaskPtr)[HiIdx] = Elt;
3739 SDOperand LoShuffle =
3740 DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2,
3741 DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
3742 &LoMask[0], LoMask.size()));
3743 SDOperand HiShuffle =
3744 DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2,
3745 DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
3746 &HiMask[0], HiMask.size()));
3747 SmallVector<SDOperand, 8> MaskOps;
3748 for (unsigned i = 0; i != NumElems; ++i) {
3749 if (Locs[i].first == -1) {
3750 MaskOps.push_back(DAG.getNode(ISD::UNDEF, MaskEVT));
3752 unsigned Idx = Locs[i].first * NumElems + Locs[i].second;
3753 MaskOps.push_back(DAG.getConstant(Idx, MaskEVT));
3756 return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, LoShuffle, HiShuffle,
3757 DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
3758 &MaskOps[0], MaskOps.size()));
3765 X86TargetLowering::LowerEXTRACT_VECTOR_ELT_SSE4(SDOperand Op,
3766 SelectionDAG &DAG) {
3767 MVT::ValueType VT = Op.getValueType();
3768 if (MVT::getSizeInBits(VT) == 8) {
3769 SDOperand Extract = DAG.getNode(X86ISD::PEXTRB, MVT::i32,
3770 Op.getOperand(0), Op.getOperand(1));
3771 SDOperand Assert = DAG.getNode(ISD::AssertZext, MVT::i32, Extract,
3772 DAG.getValueType(VT));
3773 return DAG.getNode(ISD::TRUNCATE, VT, Assert);
3774 } else if (MVT::getSizeInBits(VT) == 16) {
3775 SDOperand Extract = DAG.getNode(X86ISD::PEXTRW, MVT::i32,
3776 Op.getOperand(0), Op.getOperand(1));
3777 SDOperand Assert = DAG.getNode(ISD::AssertZext, MVT::i32, Extract,
3778 DAG.getValueType(VT));
3779 return DAG.getNode(ISD::TRUNCATE, VT, Assert);
3786 X86TargetLowering::LowerEXTRACT_VECTOR_ELT(SDOperand Op, SelectionDAG &DAG) {
3787 if (!isa<ConstantSDNode>(Op.getOperand(1)))
3790 if (Subtarget->hasSSE41())
3791 return LowerEXTRACT_VECTOR_ELT_SSE4(Op, DAG);
3793 MVT::ValueType VT = Op.getValueType();
3794 // TODO: handle v16i8.
3795 if (MVT::getSizeInBits(VT) == 16) {
3796 SDOperand Vec = Op.getOperand(0);
3797 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getValue();
3799 return DAG.getNode(ISD::TRUNCATE, MVT::i16,
3800 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, MVT::i32,
3801 DAG.getNode(ISD::BIT_CONVERT, MVT::v4i32, Vec),
3803 // Transform it so it match pextrw which produces a 32-bit result.
3804 MVT::ValueType EVT = (MVT::ValueType)(VT+1);
3805 SDOperand Extract = DAG.getNode(X86ISD::PEXTRW, EVT,
3806 Op.getOperand(0), Op.getOperand(1));
3807 SDOperand Assert = DAG.getNode(ISD::AssertZext, EVT, Extract,
3808 DAG.getValueType(VT));
3809 return DAG.getNode(ISD::TRUNCATE, VT, Assert);
3810 } else if (MVT::getSizeInBits(VT) == 32) {
3811 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getValue();
3814 // SHUFPS the element to the lowest double word, then movss.
3815 MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(4);
3816 SmallVector<SDOperand, 8> IdxVec;
3818 push_back(DAG.getConstant(Idx, MVT::getVectorElementType(MaskVT)));
3820 push_back(DAG.getNode(ISD::UNDEF, MVT::getVectorElementType(MaskVT)));
3822 push_back(DAG.getNode(ISD::UNDEF, MVT::getVectorElementType(MaskVT)));
3824 push_back(DAG.getNode(ISD::UNDEF, MVT::getVectorElementType(MaskVT)));
3825 SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
3826 &IdxVec[0], IdxVec.size());
3827 SDOperand Vec = Op.getOperand(0);
3828 Vec = DAG.getNode(ISD::VECTOR_SHUFFLE, Vec.getValueType(),
3829 Vec, DAG.getNode(ISD::UNDEF, Vec.getValueType()), Mask);
3830 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, VT, Vec,
3831 DAG.getIntPtrConstant(0));
3832 } else if (MVT::getSizeInBits(VT) == 64) {
3833 // FIXME: .td only matches this for <2 x f64>, not <2 x i64> on 32b
3834 // FIXME: seems like this should be unnecessary if mov{h,l}pd were taught
3835 // to match extract_elt for f64.
3836 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getValue();
3840 // UNPCKHPD the element to the lowest double word, then movsd.
3841 // Note if the lower 64 bits of the result of the UNPCKHPD is then stored
3842 // to a f64mem, the whole operation is folded into a single MOVHPDmr.
3843 MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(4);
3844 SmallVector<SDOperand, 8> IdxVec;
3845 IdxVec.push_back(DAG.getConstant(1, MVT::getVectorElementType(MaskVT)));
3847 push_back(DAG.getNode(ISD::UNDEF, MVT::getVectorElementType(MaskVT)));
3848 SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
3849 &IdxVec[0], IdxVec.size());
3850 SDOperand Vec = Op.getOperand(0);
3851 Vec = DAG.getNode(ISD::VECTOR_SHUFFLE, Vec.getValueType(),
3852 Vec, DAG.getNode(ISD::UNDEF, Vec.getValueType()), Mask);
3853 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, VT, Vec,
3854 DAG.getIntPtrConstant(0));
3861 X86TargetLowering::LowerINSERT_VECTOR_ELT_SSE4(SDOperand Op, SelectionDAG &DAG){
3862 MVT::ValueType VT = Op.getValueType();
3863 MVT::ValueType EVT = MVT::getVectorElementType(VT);
3865 SDOperand N0 = Op.getOperand(0);
3866 SDOperand N1 = Op.getOperand(1);
3867 SDOperand N2 = Op.getOperand(2);
3869 if ((MVT::getSizeInBits(EVT) == 8) || (MVT::getSizeInBits(EVT) == 16)) {
3870 unsigned Opc = (MVT::getSizeInBits(EVT) == 8) ? X86ISD::PINSRB
3872 // Transform it so it match pinsr{b,w} which expects a GR32 as its second
3874 if (N1.getValueType() != MVT::i32)
3875 N1 = DAG.getNode(ISD::ANY_EXTEND, MVT::i32, N1);
3876 if (N2.getValueType() != MVT::i32)
3877 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getValue());
3878 return DAG.getNode(Opc, VT, N0, N1, N2);
3879 } else if (EVT == MVT::f32) {
3880 // Bits [7:6] of the constant are the source select. This will always be
3881 // zero here. The DAG Combiner may combine an extract_elt index into these
3882 // bits. For example (insert (extract, 3), 2) could be matched by putting
3883 // the '3' into bits [7:6] of X86ISD::INSERTPS.
3884 // Bits [5:4] of the constant are the destination select. This is the
3885 // value of the incoming immediate.
3886 // Bits [3:0] of the constant are the zero mask. The DAG Combiner may
3887 // combine either bitwise AND or insert of float 0.0 to set these bits.
3888 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getValue() << 4);
3889 return DAG.getNode(X86ISD::INSERTPS, VT, N0, N1, N2);
3895 X86TargetLowering::LowerINSERT_VECTOR_ELT(SDOperand Op, SelectionDAG &DAG) {
3896 MVT::ValueType VT = Op.getValueType();
3897 MVT::ValueType EVT = MVT::getVectorElementType(VT);
3899 if (Subtarget->hasSSE41())
3900 return LowerINSERT_VECTOR_ELT_SSE4(Op, DAG);
3905 SDOperand N0 = Op.getOperand(0);
3906 SDOperand N1 = Op.getOperand(1);
3907 SDOperand N2 = Op.getOperand(2);
3909 if (MVT::getSizeInBits(EVT) == 16) {
3910 // Transform it so it match pinsrw which expects a 16-bit value in a GR32
3911 // as its second argument.
3912 if (N1.getValueType() != MVT::i32)
3913 N1 = DAG.getNode(ISD::ANY_EXTEND, MVT::i32, N1);
3914 if (N2.getValueType() != MVT::i32)
3915 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getValue());
3916 return DAG.getNode(X86ISD::PINSRW, VT, N0, N1, N2);
3922 X86TargetLowering::LowerSCALAR_TO_VECTOR(SDOperand Op, SelectionDAG &DAG) {
3923 SDOperand AnyExt = DAG.getNode(ISD::ANY_EXTEND, MVT::i32, Op.getOperand(0));
3924 MVT::ValueType VT = MVT::v2i32;
3925 switch (Op.getValueType()) {
3932 return DAG.getNode(ISD::BIT_CONVERT, Op.getValueType(),
3933 DAG.getNode(ISD::SCALAR_TO_VECTOR, VT, AnyExt));
3936 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
3937 // their target countpart wrapped in the X86ISD::Wrapper node. Suppose N is
3938 // one of the above mentioned nodes. It has to be wrapped because otherwise
3939 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
3940 // be used to form addressing mode. These wrapped nodes will be selected
3943 X86TargetLowering::LowerConstantPool(SDOperand Op, SelectionDAG &DAG) {
3944 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
3945 SDOperand Result = DAG.getTargetConstantPool(CP->getConstVal(),
3947 CP->getAlignment());
3948 Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(), Result);
3949 // With PIC, the address is actually $g + Offset.
3950 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
3951 !Subtarget->isPICStyleRIPRel()) {
3952 Result = DAG.getNode(ISD::ADD, getPointerTy(),
3953 DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
3961 X86TargetLowering::LowerGlobalAddress(SDOperand Op, SelectionDAG &DAG) {
3962 GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
3963 SDOperand Result = DAG.getTargetGlobalAddress(GV, getPointerTy());
3964 // If it's a debug information descriptor, don't mess with it.
3965 if (DAG.isVerifiedDebugInfoDesc(Op))
3967 Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(), Result);
3968 // With PIC, the address is actually $g + Offset.
3969 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
3970 !Subtarget->isPICStyleRIPRel()) {
3971 Result = DAG.getNode(ISD::ADD, getPointerTy(),
3972 DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
3976 // For Darwin & Mingw32, external and weak symbols are indirect, so we want to
3977 // load the value at address GV, not the value of GV itself. This means that
3978 // the GlobalAddress must be in the base or index register of the address, not
3979 // the GV offset field. Platform check is inside GVRequiresExtraLoad() call
3980 // The same applies for external symbols during PIC codegen
3981 if (Subtarget->GVRequiresExtraLoad(GV, getTargetMachine(), false))
3982 Result = DAG.getLoad(getPointerTy(), DAG.getEntryNode(), Result,
3983 PseudoSourceValue::getGOT(), 0);
3988 // Lower ISD::GlobalTLSAddress using the "general dynamic" model
3990 LowerToTLSGeneralDynamicModel(GlobalAddressSDNode *GA, SelectionDAG &DAG,
3991 const MVT::ValueType PtrVT) {
3993 SDOperand Chain = DAG.getCopyToReg(DAG.getEntryNode(), X86::EBX,
3994 DAG.getNode(X86ISD::GlobalBaseReg,
3996 InFlag = Chain.getValue(1);
3998 // emit leal symbol@TLSGD(,%ebx,1), %eax
3999 SDVTList NodeTys = DAG.getVTList(PtrVT, MVT::Other, MVT::Flag);
4000 SDOperand TGA = DAG.getTargetGlobalAddress(GA->getGlobal(),
4001 GA->getValueType(0),
4003 SDOperand Ops[] = { Chain, TGA, InFlag };
4004 SDOperand Result = DAG.getNode(X86ISD::TLSADDR, NodeTys, Ops, 3);
4005 InFlag = Result.getValue(2);
4006 Chain = Result.getValue(1);
4008 // call ___tls_get_addr. This function receives its argument in
4009 // the register EAX.
4010 Chain = DAG.getCopyToReg(Chain, X86::EAX, Result, InFlag);
4011 InFlag = Chain.getValue(1);
4013 NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
4014 SDOperand Ops1[] = { Chain,
4015 DAG.getTargetExternalSymbol("___tls_get_addr",
4017 DAG.getRegister(X86::EAX, PtrVT),
4018 DAG.getRegister(X86::EBX, PtrVT),
4020 Chain = DAG.getNode(X86ISD::CALL, NodeTys, Ops1, 5);
4021 InFlag = Chain.getValue(1);
4023 return DAG.getCopyFromReg(Chain, X86::EAX, PtrVT, InFlag);
4026 // Lower ISD::GlobalTLSAddress using the "initial exec" (for no-pic) or
4027 // "local exec" model.
4029 LowerToTLSExecModel(GlobalAddressSDNode *GA, SelectionDAG &DAG,
4030 const MVT::ValueType PtrVT) {
4031 // Get the Thread Pointer
4032 SDOperand ThreadPointer = DAG.getNode(X86ISD::THREAD_POINTER, PtrVT);
4033 // emit "addl x@ntpoff,%eax" (local exec) or "addl x@indntpoff,%eax" (initial
4035 SDOperand TGA = DAG.getTargetGlobalAddress(GA->getGlobal(),
4036 GA->getValueType(0),
4038 SDOperand Offset = DAG.getNode(X86ISD::Wrapper, PtrVT, TGA);
4040 if (GA->getGlobal()->isDeclaration()) // initial exec TLS model
4041 Offset = DAG.getLoad(PtrVT, DAG.getEntryNode(), Offset,
4042 PseudoSourceValue::getGOT(), 0);
4044 // The address of the thread local variable is the add of the thread
4045 // pointer with the offset of the variable.
4046 return DAG.getNode(ISD::ADD, PtrVT, ThreadPointer, Offset);
4050 X86TargetLowering::LowerGlobalTLSAddress(SDOperand Op, SelectionDAG &DAG) {
4051 // TODO: implement the "local dynamic" model
4052 // TODO: implement the "initial exec"model for pic executables
4053 assert(!Subtarget->is64Bit() && Subtarget->isTargetELF() &&
4054 "TLS not implemented for non-ELF and 64-bit targets");
4055 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
4056 // If the relocation model is PIC, use the "General Dynamic" TLS Model,
4057 // otherwise use the "Local Exec"TLS Model
4058 if (getTargetMachine().getRelocationModel() == Reloc::PIC_)
4059 return LowerToTLSGeneralDynamicModel(GA, DAG, getPointerTy());
4061 return LowerToTLSExecModel(GA, DAG, getPointerTy());
4065 X86TargetLowering::LowerExternalSymbol(SDOperand Op, SelectionDAG &DAG) {
4066 const char *Sym = cast<ExternalSymbolSDNode>(Op)->getSymbol();
4067 SDOperand Result = DAG.getTargetExternalSymbol(Sym, getPointerTy());
4068 Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(), Result);
4069 // With PIC, the address is actually $g + Offset.
4070 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
4071 !Subtarget->isPICStyleRIPRel()) {
4072 Result = DAG.getNode(ISD::ADD, getPointerTy(),
4073 DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
4080 SDOperand X86TargetLowering::LowerJumpTable(SDOperand Op, SelectionDAG &DAG) {
4081 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
4082 SDOperand Result = DAG.getTargetJumpTable(JT->getIndex(), getPointerTy());
4083 Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(), Result);
4084 // With PIC, the address is actually $g + Offset.
4085 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
4086 !Subtarget->isPICStyleRIPRel()) {
4087 Result = DAG.getNode(ISD::ADD, getPointerTy(),
4088 DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
4095 /// LowerShift - Lower SRA_PARTS and friends, which return two i32 values and
4096 /// take a 2 x i32 value to shift plus a shift amount.
4097 SDOperand X86TargetLowering::LowerShift(SDOperand Op, SelectionDAG &DAG) {
4098 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
4099 MVT::ValueType VT = Op.getValueType();
4100 unsigned VTBits = MVT::getSizeInBits(VT);
4101 bool isSRA = Op.getOpcode() == ISD::SRA_PARTS;
4102 SDOperand ShOpLo = Op.getOperand(0);
4103 SDOperand ShOpHi = Op.getOperand(1);
4104 SDOperand ShAmt = Op.getOperand(2);
4105 SDOperand Tmp1 = isSRA ?
4106 DAG.getNode(ISD::SRA, VT, ShOpHi, DAG.getConstant(VTBits - 1, MVT::i8)) :
4107 DAG.getConstant(0, VT);
4109 SDOperand Tmp2, Tmp3;
4110 if (Op.getOpcode() == ISD::SHL_PARTS) {
4111 Tmp2 = DAG.getNode(X86ISD::SHLD, VT, ShOpHi, ShOpLo, ShAmt);
4112 Tmp3 = DAG.getNode(ISD::SHL, VT, ShOpLo, ShAmt);
4114 Tmp2 = DAG.getNode(X86ISD::SHRD, VT, ShOpLo, ShOpHi, ShAmt);
4115 Tmp3 = DAG.getNode(isSRA ? ISD::SRA : ISD::SRL, VT, ShOpHi, ShAmt);
4118 const MVT::ValueType *VTs = DAG.getNodeValueTypes(MVT::Other, MVT::Flag);
4119 SDOperand AndNode = DAG.getNode(ISD::AND, MVT::i8, ShAmt,
4120 DAG.getConstant(VTBits, MVT::i8));
4121 SDOperand Cond = DAG.getNode(X86ISD::CMP, VT,
4122 AndNode, DAG.getConstant(0, MVT::i8));
4125 SDOperand CC = DAG.getConstant(X86::COND_NE, MVT::i8);
4126 VTs = DAG.getNodeValueTypes(VT, MVT::Flag);
4127 SmallVector<SDOperand, 4> Ops;
4128 if (Op.getOpcode() == ISD::SHL_PARTS) {
4129 Ops.push_back(Tmp2);
4130 Ops.push_back(Tmp3);
4132 Ops.push_back(Cond);
4133 Hi = DAG.getNode(X86ISD::CMOV, VT, &Ops[0], Ops.size());
4136 Ops.push_back(Tmp3);
4137 Ops.push_back(Tmp1);
4139 Ops.push_back(Cond);
4140 Lo = DAG.getNode(X86ISD::CMOV, VT, &Ops[0], Ops.size());
4142 Ops.push_back(Tmp2);
4143 Ops.push_back(Tmp3);
4145 Ops.push_back(Cond);
4146 Lo = DAG.getNode(X86ISD::CMOV, VT, &Ops[0], Ops.size());
4149 Ops.push_back(Tmp3);
4150 Ops.push_back(Tmp1);
4152 Ops.push_back(Cond);
4153 Hi = DAG.getNode(X86ISD::CMOV, VT, &Ops[0], Ops.size());
4156 VTs = DAG.getNodeValueTypes(VT, VT);
4160 return DAG.getNode(ISD::MERGE_VALUES, VTs, 2, &Ops[0], Ops.size());
4163 SDOperand X86TargetLowering::LowerSINT_TO_FP(SDOperand Op, SelectionDAG &DAG) {
4164 MVT::ValueType SrcVT = Op.getOperand(0).getValueType();
4165 assert(SrcVT <= MVT::i64 && SrcVT >= MVT::i16 &&
4166 "Unknown SINT_TO_FP to lower!");
4168 // These are really Legal; caller falls through into that case.
4169 if (SrcVT == MVT::i32 && isScalarFPTypeInSSEReg(Op.getValueType()))
4171 if (SrcVT == MVT::i64 && Op.getValueType() != MVT::f80 &&
4172 Subtarget->is64Bit())
4175 unsigned Size = MVT::getSizeInBits(SrcVT)/8;
4176 MachineFunction &MF = DAG.getMachineFunction();
4177 int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size);
4178 SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
4179 SDOperand Chain = DAG.getStore(DAG.getEntryNode(), Op.getOperand(0),
4181 PseudoSourceValue::getFixedStack(),
4186 bool useSSE = isScalarFPTypeInSSEReg(Op.getValueType());
4188 Tys = DAG.getVTList(MVT::f64, MVT::Other, MVT::Flag);
4190 Tys = DAG.getVTList(Op.getValueType(), MVT::Other);
4191 SmallVector<SDOperand, 8> Ops;
4192 Ops.push_back(Chain);
4193 Ops.push_back(StackSlot);
4194 Ops.push_back(DAG.getValueType(SrcVT));
4195 SDOperand Result = DAG.getNode(useSSE ? X86ISD::FILD_FLAG : X86ISD::FILD,
4196 Tys, &Ops[0], Ops.size());
4199 Chain = Result.getValue(1);
4200 SDOperand InFlag = Result.getValue(2);
4202 // FIXME: Currently the FST is flagged to the FILD_FLAG. This
4203 // shouldn't be necessary except that RFP cannot be live across
4204 // multiple blocks. When stackifier is fixed, they can be uncoupled.
4205 MachineFunction &MF = DAG.getMachineFunction();
4206 int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8);
4207 SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
4208 Tys = DAG.getVTList(MVT::Other);
4209 SmallVector<SDOperand, 8> Ops;
4210 Ops.push_back(Chain);
4211 Ops.push_back(Result);
4212 Ops.push_back(StackSlot);
4213 Ops.push_back(DAG.getValueType(Op.getValueType()));
4214 Ops.push_back(InFlag);
4215 Chain = DAG.getNode(X86ISD::FST, Tys, &Ops[0], Ops.size());
4216 Result = DAG.getLoad(Op.getValueType(), Chain, StackSlot,
4217 PseudoSourceValue::getFixedStack(), SSFI);
4223 std::pair<SDOperand,SDOperand> X86TargetLowering::
4224 FP_TO_SINTHelper(SDOperand Op, SelectionDAG &DAG) {
4225 assert(Op.getValueType() <= MVT::i64 && Op.getValueType() >= MVT::i16 &&
4226 "Unknown FP_TO_SINT to lower!");
4228 // These are really Legal.
4229 if (Op.getValueType() == MVT::i32 &&
4230 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
4231 return std::make_pair(SDOperand(), SDOperand());
4232 if (Subtarget->is64Bit() &&
4233 Op.getValueType() == MVT::i64 &&
4234 Op.getOperand(0).getValueType() != MVT::f80)
4235 return std::make_pair(SDOperand(), SDOperand());
4237 // We lower FP->sint64 into FISTP64, followed by a load, all to a temporary
4239 MachineFunction &MF = DAG.getMachineFunction();
4240 unsigned MemSize = MVT::getSizeInBits(Op.getValueType())/8;
4241 int SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize);
4242 SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
4244 switch (Op.getValueType()) {
4245 default: assert(0 && "Invalid FP_TO_SINT to lower!");
4246 case MVT::i16: Opc = X86ISD::FP_TO_INT16_IN_MEM; break;
4247 case MVT::i32: Opc = X86ISD::FP_TO_INT32_IN_MEM; break;
4248 case MVT::i64: Opc = X86ISD::FP_TO_INT64_IN_MEM; break;
4251 SDOperand Chain = DAG.getEntryNode();
4252 SDOperand Value = Op.getOperand(0);
4253 if (isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType())) {
4254 assert(Op.getValueType() == MVT::i64 && "Invalid FP_TO_SINT to lower!");
4255 Chain = DAG.getStore(Chain, Value, StackSlot,
4256 PseudoSourceValue::getFixedStack(), SSFI);
4257 SDVTList Tys = DAG.getVTList(Op.getOperand(0).getValueType(), MVT::Other);
4259 Chain, StackSlot, DAG.getValueType(Op.getOperand(0).getValueType())
4261 Value = DAG.getNode(X86ISD::FLD, Tys, Ops, 3);
4262 Chain = Value.getValue(1);
4263 SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize);
4264 StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
4267 // Build the FP_TO_INT*_IN_MEM
4268 SDOperand Ops[] = { Chain, Value, StackSlot };
4269 SDOperand FIST = DAG.getNode(Opc, MVT::Other, Ops, 3);
4271 return std::make_pair(FIST, StackSlot);
4274 SDOperand X86TargetLowering::LowerFP_TO_SINT(SDOperand Op, SelectionDAG &DAG) {
4275 std::pair<SDOperand,SDOperand> Vals = FP_TO_SINTHelper(Op, DAG);
4276 SDOperand FIST = Vals.first, StackSlot = Vals.second;
4277 if (FIST.Val == 0) return SDOperand();
4280 return DAG.getLoad(Op.getValueType(), FIST, StackSlot, NULL, 0);
4283 SDNode *X86TargetLowering::ExpandFP_TO_SINT(SDNode *N, SelectionDAG &DAG) {
4284 std::pair<SDOperand,SDOperand> Vals = FP_TO_SINTHelper(SDOperand(N, 0), DAG);
4285 SDOperand FIST = Vals.first, StackSlot = Vals.second;
4286 if (FIST.Val == 0) return 0;
4288 // Return an i64 load from the stack slot.
4289 SDOperand Res = DAG.getLoad(MVT::i64, FIST, StackSlot, NULL, 0);
4291 // Use a MERGE_VALUES node to drop the chain result value.
4292 return DAG.getNode(ISD::MERGE_VALUES, MVT::i64, Res).Val;
4295 SDOperand X86TargetLowering::LowerFABS(SDOperand Op, SelectionDAG &DAG) {
4296 MVT::ValueType VT = Op.getValueType();
4297 MVT::ValueType EltVT = VT;
4298 if (MVT::isVector(VT))
4299 EltVT = MVT::getVectorElementType(VT);
4300 const Type *OpNTy = MVT::getTypeForValueType(EltVT);
4301 std::vector<Constant*> CV;
4302 if (EltVT == MVT::f64) {
4303 Constant *C = ConstantFP::get(OpNTy, APFloat(APInt(64, ~(1ULL << 63))));
4307 Constant *C = ConstantFP::get(OpNTy, APFloat(APInt(32, ~(1U << 31))));
4313 Constant *C = ConstantVector::get(CV);
4314 SDOperand CPIdx = DAG.getConstantPool(C, getPointerTy(), 4);
4315 SDOperand Mask = DAG.getLoad(VT, DAG.getEntryNode(), CPIdx,
4316 PseudoSourceValue::getConstantPool(), 0,
4318 return DAG.getNode(X86ISD::FAND, VT, Op.getOperand(0), Mask);
4321 SDOperand X86TargetLowering::LowerFNEG(SDOperand Op, SelectionDAG &DAG) {
4322 MVT::ValueType VT = Op.getValueType();
4323 MVT::ValueType EltVT = VT;
4324 unsigned EltNum = 1;
4325 if (MVT::isVector(VT)) {
4326 EltVT = MVT::getVectorElementType(VT);
4327 EltNum = MVT::getVectorNumElements(VT);
4329 const Type *OpNTy = MVT::getTypeForValueType(EltVT);
4330 std::vector<Constant*> CV;
4331 if (EltVT == MVT::f64) {
4332 Constant *C = ConstantFP::get(OpNTy, APFloat(APInt(64, 1ULL << 63)));
4336 Constant *C = ConstantFP::get(OpNTy, APFloat(APInt(32, 1U << 31)));
4342 Constant *C = ConstantVector::get(CV);
4343 SDOperand CPIdx = DAG.getConstantPool(C, getPointerTy(), 4);
4344 SDOperand Mask = DAG.getLoad(VT, DAG.getEntryNode(), CPIdx,
4345 PseudoSourceValue::getConstantPool(), 0,
4347 if (MVT::isVector(VT)) {
4348 return DAG.getNode(ISD::BIT_CONVERT, VT,
4349 DAG.getNode(ISD::XOR, MVT::v2i64,
4350 DAG.getNode(ISD::BIT_CONVERT, MVT::v2i64, Op.getOperand(0)),
4351 DAG.getNode(ISD::BIT_CONVERT, MVT::v2i64, Mask)));
4353 return DAG.getNode(X86ISD::FXOR, VT, Op.getOperand(0), Mask);
4357 SDOperand X86TargetLowering::LowerFCOPYSIGN(SDOperand Op, SelectionDAG &DAG) {
4358 SDOperand Op0 = Op.getOperand(0);
4359 SDOperand Op1 = Op.getOperand(1);
4360 MVT::ValueType VT = Op.getValueType();
4361 MVT::ValueType SrcVT = Op1.getValueType();
4362 const Type *SrcTy = MVT::getTypeForValueType(SrcVT);
4364 // If second operand is smaller, extend it first.
4365 if (MVT::getSizeInBits(SrcVT) < MVT::getSizeInBits(VT)) {
4366 Op1 = DAG.getNode(ISD::FP_EXTEND, VT, Op1);
4368 SrcTy = MVT::getTypeForValueType(SrcVT);
4370 // And if it is bigger, shrink it first.
4371 if (MVT::getSizeInBits(SrcVT) > MVT::getSizeInBits(VT)) {
4372 Op1 = DAG.getNode(ISD::FP_ROUND, VT, Op1, DAG.getIntPtrConstant(1));
4374 SrcTy = MVT::getTypeForValueType(SrcVT);
4377 // At this point the operands and the result should have the same
4378 // type, and that won't be f80 since that is not custom lowered.
4380 // First get the sign bit of second operand.
4381 std::vector<Constant*> CV;
4382 if (SrcVT == MVT::f64) {
4383 CV.push_back(ConstantFP::get(SrcTy, APFloat(APInt(64, 1ULL << 63))));
4384 CV.push_back(ConstantFP::get(SrcTy, APFloat(APInt(64, 0))));
4386 CV.push_back(ConstantFP::get(SrcTy, APFloat(APInt(32, 1U << 31))));
4387 CV.push_back(ConstantFP::get(SrcTy, APFloat(APInt(32, 0))));
4388 CV.push_back(ConstantFP::get(SrcTy, APFloat(APInt(32, 0))));
4389 CV.push_back(ConstantFP::get(SrcTy, APFloat(APInt(32, 0))));
4391 Constant *C = ConstantVector::get(CV);
4392 SDOperand CPIdx = DAG.getConstantPool(C, getPointerTy(), 4);
4393 SDOperand Mask1 = DAG.getLoad(SrcVT, DAG.getEntryNode(), CPIdx,
4394 PseudoSourceValue::getConstantPool(), 0,
4396 SDOperand SignBit = DAG.getNode(X86ISD::FAND, SrcVT, Op1, Mask1);
4398 // Shift sign bit right or left if the two operands have different types.
4399 if (MVT::getSizeInBits(SrcVT) > MVT::getSizeInBits(VT)) {
4400 // Op0 is MVT::f32, Op1 is MVT::f64.
4401 SignBit = DAG.getNode(ISD::SCALAR_TO_VECTOR, MVT::v2f64, SignBit);
4402 SignBit = DAG.getNode(X86ISD::FSRL, MVT::v2f64, SignBit,
4403 DAG.getConstant(32, MVT::i32));
4404 SignBit = DAG.getNode(ISD::BIT_CONVERT, MVT::v4f32, SignBit);
4405 SignBit = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, MVT::f32, SignBit,
4406 DAG.getIntPtrConstant(0));
4409 // Clear first operand sign bit.
4411 if (VT == MVT::f64) {
4412 CV.push_back(ConstantFP::get(SrcTy, APFloat(APInt(64, ~(1ULL << 63)))));
4413 CV.push_back(ConstantFP::get(SrcTy, APFloat(APInt(64, 0))));
4415 CV.push_back(ConstantFP::get(SrcTy, APFloat(APInt(32, ~(1U << 31)))));
4416 CV.push_back(ConstantFP::get(SrcTy, APFloat(APInt(32, 0))));
4417 CV.push_back(ConstantFP::get(SrcTy, APFloat(APInt(32, 0))));
4418 CV.push_back(ConstantFP::get(SrcTy, APFloat(APInt(32, 0))));
4420 C = ConstantVector::get(CV);
4421 CPIdx = DAG.getConstantPool(C, getPointerTy(), 4);
4422 SDOperand Mask2 = DAG.getLoad(VT, DAG.getEntryNode(), CPIdx,
4423 PseudoSourceValue::getConstantPool(), 0,
4425 SDOperand Val = DAG.getNode(X86ISD::FAND, VT, Op0, Mask2);
4427 // Or the value with the sign bit.
4428 return DAG.getNode(X86ISD::FOR, VT, Val, SignBit);
4431 SDOperand X86TargetLowering::LowerSETCC(SDOperand Op, SelectionDAG &DAG) {
4432 assert(Op.getValueType() == MVT::i8 && "SetCC type must be 8-bit integer");
4434 SDOperand Op0 = Op.getOperand(0);
4435 SDOperand Op1 = Op.getOperand(1);
4436 SDOperand CC = Op.getOperand(2);
4437 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
4438 bool isFP = MVT::isFloatingPoint(Op.getOperand(1).getValueType());
4441 if (translateX86CC(cast<CondCodeSDNode>(CC)->get(), isFP, X86CC,
4443 Cond = DAG.getNode(X86ISD::CMP, MVT::i32, Op0, Op1);
4444 return DAG.getNode(X86ISD::SETCC, MVT::i8,
4445 DAG.getConstant(X86CC, MVT::i8), Cond);
4448 assert(isFP && "Illegal integer SetCC!");
4450 Cond = DAG.getNode(X86ISD::CMP, MVT::i32, Op0, Op1);
4451 switch (SetCCOpcode) {
4452 default: assert(false && "Illegal floating point SetCC!");
4453 case ISD::SETOEQ: { // !PF & ZF
4454 SDOperand Tmp1 = DAG.getNode(X86ISD::SETCC, MVT::i8,
4455 DAG.getConstant(X86::COND_NP, MVT::i8), Cond);
4456 SDOperand Tmp2 = DAG.getNode(X86ISD::SETCC, MVT::i8,
4457 DAG.getConstant(X86::COND_E, MVT::i8), Cond);
4458 return DAG.getNode(ISD::AND, MVT::i8, Tmp1, Tmp2);
4460 case ISD::SETUNE: { // PF | !ZF
4461 SDOperand Tmp1 = DAG.getNode(X86ISD::SETCC, MVT::i8,
4462 DAG.getConstant(X86::COND_P, MVT::i8), Cond);
4463 SDOperand Tmp2 = DAG.getNode(X86ISD::SETCC, MVT::i8,
4464 DAG.getConstant(X86::COND_NE, MVT::i8), Cond);
4465 return DAG.getNode(ISD::OR, MVT::i8, Tmp1, Tmp2);
4471 SDOperand X86TargetLowering::LowerSELECT(SDOperand Op, SelectionDAG &DAG) {
4472 bool addTest = true;
4473 SDOperand Cond = Op.getOperand(0);
4476 if (Cond.getOpcode() == ISD::SETCC)
4477 Cond = LowerSETCC(Cond, DAG);
4479 // If condition flag is set by a X86ISD::CMP, then use it as the condition
4480 // setting operand in place of the X86ISD::SETCC.
4481 if (Cond.getOpcode() == X86ISD::SETCC) {
4482 CC = Cond.getOperand(0);
4484 SDOperand Cmp = Cond.getOperand(1);
4485 unsigned Opc = Cmp.getOpcode();
4486 MVT::ValueType VT = Op.getValueType();
4488 bool IllegalFPCMov = false;
4489 if (MVT::isFloatingPoint(VT) && !MVT::isVector(VT) &&
4490 !isScalarFPTypeInSSEReg(VT)) // FPStack?
4491 IllegalFPCMov = !hasFPCMov(cast<ConstantSDNode>(CC)->getSignExtended());
4493 if ((Opc == X86ISD::CMP ||
4494 Opc == X86ISD::COMI ||
4495 Opc == X86ISD::UCOMI) && !IllegalFPCMov) {
4502 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
4503 Cond= DAG.getNode(X86ISD::CMP, MVT::i32, Cond, DAG.getConstant(0, MVT::i8));
4506 const MVT::ValueType *VTs = DAG.getNodeValueTypes(Op.getValueType(),
4508 SmallVector<SDOperand, 4> Ops;
4509 // X86ISD::CMOV means set the result (which is operand 1) to the RHS if
4510 // condition is true.
4511 Ops.push_back(Op.getOperand(2));
4512 Ops.push_back(Op.getOperand(1));
4514 Ops.push_back(Cond);
4515 return DAG.getNode(X86ISD::CMOV, VTs, 2, &Ops[0], Ops.size());
4518 SDOperand X86TargetLowering::LowerBRCOND(SDOperand Op, SelectionDAG &DAG) {
4519 bool addTest = true;
4520 SDOperand Chain = Op.getOperand(0);
4521 SDOperand Cond = Op.getOperand(1);
4522 SDOperand Dest = Op.getOperand(2);
4525 if (Cond.getOpcode() == ISD::SETCC)
4526 Cond = LowerSETCC(Cond, DAG);
4528 // If condition flag is set by a X86ISD::CMP, then use it as the condition
4529 // setting operand in place of the X86ISD::SETCC.
4530 if (Cond.getOpcode() == X86ISD::SETCC) {
4531 CC = Cond.getOperand(0);
4533 SDOperand Cmp = Cond.getOperand(1);
4534 unsigned Opc = Cmp.getOpcode();
4535 if (Opc == X86ISD::CMP ||
4536 Opc == X86ISD::COMI ||
4537 Opc == X86ISD::UCOMI) {
4544 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
4545 Cond= DAG.getNode(X86ISD::CMP, MVT::i32, Cond, DAG.getConstant(0, MVT::i8));
4547 return DAG.getNode(X86ISD::BRCOND, Op.getValueType(),
4548 Chain, Op.getOperand(2), CC, Cond);
4552 // Lower dynamic stack allocation to _alloca call for Cygwin/Mingw targets.
4553 // Calls to _alloca is needed to probe the stack when allocating more than 4k
4554 // bytes in one go. Touching the stack at 4K increments is necessary to ensure
4555 // that the guard pages used by the OS virtual memory manager are allocated in
4556 // correct sequence.
4558 X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDOperand Op,
4559 SelectionDAG &DAG) {
4560 assert(Subtarget->isTargetCygMing() &&
4561 "This should be used only on Cygwin/Mingw targets");
4564 SDOperand Chain = Op.getOperand(0);
4565 SDOperand Size = Op.getOperand(1);
4566 // FIXME: Ensure alignment here
4570 MVT::ValueType IntPtr = getPointerTy();
4571 MVT::ValueType SPTy = Subtarget->is64Bit() ? MVT::i64 : MVT::i32;
4573 Chain = DAG.getCopyToReg(Chain, X86::EAX, Size, Flag);
4574 Flag = Chain.getValue(1);
4576 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
4577 SDOperand Ops[] = { Chain,
4578 DAG.getTargetExternalSymbol("_alloca", IntPtr),
4579 DAG.getRegister(X86::EAX, IntPtr),
4581 Chain = DAG.getNode(X86ISD::CALL, NodeTys, Ops, 4);
4582 Flag = Chain.getValue(1);
4584 Chain = DAG.getCopyFromReg(Chain, X86StackPtr, SPTy).getValue(1);
4586 std::vector<MVT::ValueType> Tys;
4587 Tys.push_back(SPTy);
4588 Tys.push_back(MVT::Other);
4589 SDOperand Ops1[2] = { Chain.getValue(0), Chain };
4590 return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops1, 2);
4593 SDOperand X86TargetLowering::LowerMEMSET(SDOperand Op, SelectionDAG &DAG) {
4594 SDOperand InFlag(0, 0);
4595 SDOperand Chain = Op.getOperand(0);
4597 (unsigned)cast<ConstantSDNode>(Op.getOperand(4))->getValue();
4598 if (Align == 0) Align = 1;
4600 ConstantSDNode *I = dyn_cast<ConstantSDNode>(Op.getOperand(3));
4601 // If not DWORD aligned or size is more than the threshold, call memset.
4602 // The libc version is likely to be faster for these cases. It can use the
4603 // address value and run time information about the CPU.
4604 if ((Align & 3) != 0 ||
4605 (I && I->getValue() > Subtarget->getMaxInlineSizeThreshold())) {
4606 MVT::ValueType IntPtr = getPointerTy();
4607 const Type *IntPtrTy = getTargetData()->getIntPtrType();
4608 TargetLowering::ArgListTy Args;
4609 TargetLowering::ArgListEntry Entry;
4610 Entry.Node = Op.getOperand(1);
4611 Entry.Ty = IntPtrTy;
4612 Args.push_back(Entry);
4613 // Extend the unsigned i8 argument to be an int value for the call.
4614 Entry.Node = DAG.getNode(ISD::ZERO_EXTEND, MVT::i32, Op.getOperand(2));
4615 Entry.Ty = IntPtrTy;
4616 Args.push_back(Entry);
4617 Entry.Node = Op.getOperand(3);
4618 Args.push_back(Entry);
4619 std::pair<SDOperand,SDOperand> CallResult =
4620 LowerCallTo(Chain, Type::VoidTy, false, false, false, CallingConv::C,
4621 false, DAG.getExternalSymbol("memset", IntPtr), Args, DAG);
4622 return CallResult.second;
4627 ConstantSDNode *ValC = dyn_cast<ConstantSDNode>(Op.getOperand(2));
4628 unsigned BytesLeft = 0;
4629 bool TwoRepStos = false;
4632 uint64_t Val = ValC->getValue() & 255;
4634 // If the value is a constant, then we can potentially use larger sets.
4635 switch (Align & 3) {
4636 case 2: // WORD aligned
4639 Val = (Val << 8) | Val;
4641 case 0: // DWORD aligned
4644 Val = (Val << 8) | Val;
4645 Val = (Val << 16) | Val;
4646 if (Subtarget->is64Bit() && ((Align & 0xF) == 0)) { // QWORD aligned
4649 Val = (Val << 32) | Val;
4652 default: // Byte aligned
4655 Count = Op.getOperand(3);
4659 if (AVT > MVT::i8) {
4661 unsigned UBytes = MVT::getSizeInBits(AVT) / 8;
4662 Count = DAG.getIntPtrConstant(I->getValue() / UBytes);
4663 BytesLeft = I->getValue() % UBytes;
4665 assert(AVT >= MVT::i32 &&
4666 "Do not use rep;stos if not at least DWORD aligned");
4667 Count = DAG.getNode(ISD::SRL, Op.getOperand(3).getValueType(),
4668 Op.getOperand(3), DAG.getConstant(2, MVT::i8));
4673 Chain = DAG.getCopyToReg(Chain, ValReg, DAG.getConstant(Val, AVT),
4675 InFlag = Chain.getValue(1);
4678 Count = Op.getOperand(3);
4679 Chain = DAG.getCopyToReg(Chain, X86::AL, Op.getOperand(2), InFlag);
4680 InFlag = Chain.getValue(1);
4683 Chain = DAG.getCopyToReg(Chain, Subtarget->is64Bit() ? X86::RCX : X86::ECX,
4685 InFlag = Chain.getValue(1);
4686 Chain = DAG.getCopyToReg(Chain, Subtarget->is64Bit() ? X86::RDI : X86::EDI,
4687 Op.getOperand(1), InFlag);
4688 InFlag = Chain.getValue(1);
4690 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
4691 SmallVector<SDOperand, 8> Ops;
4692 Ops.push_back(Chain);
4693 Ops.push_back(DAG.getValueType(AVT));
4694 Ops.push_back(InFlag);
4695 Chain = DAG.getNode(X86ISD::REP_STOS, Tys, &Ops[0], Ops.size());
4698 InFlag = Chain.getValue(1);
4699 Count = Op.getOperand(3);
4700 MVT::ValueType CVT = Count.getValueType();
4701 SDOperand Left = DAG.getNode(ISD::AND, CVT, Count,
4702 DAG.getConstant((AVT == MVT::i64) ? 7 : 3, CVT));
4703 Chain = DAG.getCopyToReg(Chain, (CVT == MVT::i64) ? X86::RCX : X86::ECX,
4705 InFlag = Chain.getValue(1);
4706 Tys = DAG.getVTList(MVT::Other, MVT::Flag);
4708 Ops.push_back(Chain);
4709 Ops.push_back(DAG.getValueType(MVT::i8));
4710 Ops.push_back(InFlag);
4711 Chain = DAG.getNode(X86ISD::REP_STOS, Tys, &Ops[0], Ops.size());
4712 } else if (BytesLeft) {
4713 // Issue stores for the last 1 - 7 bytes.
4715 unsigned Val = ValC->getValue() & 255;
4716 unsigned Offset = I->getValue() - BytesLeft;
4717 SDOperand DstAddr = Op.getOperand(1);
4718 MVT::ValueType AddrVT = DstAddr.getValueType();
4719 if (BytesLeft >= 4) {
4720 Val = (Val << 8) | Val;
4721 Val = (Val << 16) | Val;
4722 Value = DAG.getConstant(Val, MVT::i32);
4723 Chain = DAG.getStore(Chain, Value,
4724 DAG.getNode(ISD::ADD, AddrVT, DstAddr,
4725 DAG.getConstant(Offset, AddrVT)),
4730 if (BytesLeft >= 2) {
4731 Value = DAG.getConstant((Val << 8) | Val, MVT::i16);
4732 Chain = DAG.getStore(Chain, Value,
4733 DAG.getNode(ISD::ADD, AddrVT, DstAddr,
4734 DAG.getConstant(Offset, AddrVT)),
4739 if (BytesLeft == 1) {
4740 Value = DAG.getConstant(Val, MVT::i8);
4741 Chain = DAG.getStore(Chain, Value,
4742 DAG.getNode(ISD::ADD, AddrVT, DstAddr,
4743 DAG.getConstant(Offset, AddrVT)),
4751 SDOperand X86TargetLowering::LowerMEMCPYInline(SDOperand Chain,
4756 SelectionDAG &DAG) {
4758 unsigned BytesLeft = 0;
4759 switch (Align & 3) {
4760 case 2: // WORD aligned
4763 case 0: // DWORD aligned
4765 if (Subtarget->is64Bit() && ((Align & 0xF) == 0)) // QWORD aligned
4768 default: // Byte aligned
4773 unsigned UBytes = MVT::getSizeInBits(AVT) / 8;
4774 SDOperand Count = DAG.getIntPtrConstant(Size / UBytes);
4775 BytesLeft = Size % UBytes;
4777 SDOperand InFlag(0, 0);
4778 Chain = DAG.getCopyToReg(Chain, Subtarget->is64Bit() ? X86::RCX : X86::ECX,
4780 InFlag = Chain.getValue(1);
4781 Chain = DAG.getCopyToReg(Chain, Subtarget->is64Bit() ? X86::RDI : X86::EDI,
4783 InFlag = Chain.getValue(1);
4784 Chain = DAG.getCopyToReg(Chain, Subtarget->is64Bit() ? X86::RSI : X86::ESI,
4786 InFlag = Chain.getValue(1);
4788 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
4789 SmallVector<SDOperand, 8> Ops;
4790 Ops.push_back(Chain);
4791 Ops.push_back(DAG.getValueType(AVT));
4792 Ops.push_back(InFlag);
4793 Chain = DAG.getNode(X86ISD::REP_MOVS, Tys, &Ops[0], Ops.size());
4796 // Issue loads and stores for the last 1 - 7 bytes.
4797 unsigned Offset = Size - BytesLeft;
4798 SDOperand DstAddr = Dest;
4799 MVT::ValueType DstVT = DstAddr.getValueType();
4800 SDOperand SrcAddr = Source;
4801 MVT::ValueType SrcVT = SrcAddr.getValueType();
4803 if (BytesLeft >= 4) {
4804 Value = DAG.getLoad(MVT::i32, Chain,
4805 DAG.getNode(ISD::ADD, SrcVT, SrcAddr,
4806 DAG.getConstant(Offset, SrcVT)),
4808 Chain = Value.getValue(1);
4809 Chain = DAG.getStore(Chain, Value,
4810 DAG.getNode(ISD::ADD, DstVT, DstAddr,
4811 DAG.getConstant(Offset, DstVT)),
4816 if (BytesLeft >= 2) {
4817 Value = DAG.getLoad(MVT::i16, Chain,
4818 DAG.getNode(ISD::ADD, SrcVT, SrcAddr,
4819 DAG.getConstant(Offset, SrcVT)),
4821 Chain = Value.getValue(1);
4822 Chain = DAG.getStore(Chain, Value,
4823 DAG.getNode(ISD::ADD, DstVT, DstAddr,
4824 DAG.getConstant(Offset, DstVT)),
4830 if (BytesLeft == 1) {
4831 Value = DAG.getLoad(MVT::i8, Chain,
4832 DAG.getNode(ISD::ADD, SrcVT, SrcAddr,
4833 DAG.getConstant(Offset, SrcVT)),
4835 Chain = Value.getValue(1);
4836 Chain = DAG.getStore(Chain, Value,
4837 DAG.getNode(ISD::ADD, DstVT, DstAddr,
4838 DAG.getConstant(Offset, DstVT)),
4846 /// Expand the result of: i64,outchain = READCYCLECOUNTER inchain
4847 SDNode *X86TargetLowering::ExpandREADCYCLECOUNTER(SDNode *N, SelectionDAG &DAG){
4848 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
4849 SDOperand TheChain = N->getOperand(0);
4850 SDOperand rd = DAG.getNode(X86ISD::RDTSC_DAG, Tys, &TheChain, 1);
4851 if (Subtarget->is64Bit()) {
4852 SDOperand rax = DAG.getCopyFromReg(rd, X86::RAX, MVT::i64, rd.getValue(1));
4853 SDOperand rdx = DAG.getCopyFromReg(rax.getValue(1), X86::RDX,
4854 MVT::i64, rax.getValue(2));
4855 SDOperand Tmp = DAG.getNode(ISD::SHL, MVT::i64, rdx,
4856 DAG.getConstant(32, MVT::i8));
4858 DAG.getNode(ISD::OR, MVT::i64, rax, Tmp), rdx.getValue(1)
4861 Tys = DAG.getVTList(MVT::i64, MVT::Other);
4862 return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops, 2).Val;
4865 SDOperand eax = DAG.getCopyFromReg(rd, X86::EAX, MVT::i32, rd.getValue(1));
4866 SDOperand edx = DAG.getCopyFromReg(eax.getValue(1), X86::EDX,
4867 MVT::i32, eax.getValue(2));
4868 // Use a buildpair to merge the two 32-bit values into a 64-bit one.
4869 SDOperand Ops[] = { eax, edx };
4870 Ops[0] = DAG.getNode(ISD::BUILD_PAIR, MVT::i64, Ops, 2);
4872 // Use a MERGE_VALUES to return the value and chain.
4873 Ops[1] = edx.getValue(1);
4874 Tys = DAG.getVTList(MVT::i64, MVT::Other);
4875 return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops, 2).Val;
4878 SDOperand X86TargetLowering::LowerVASTART(SDOperand Op, SelectionDAG &DAG) {
4879 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
4881 if (!Subtarget->is64Bit()) {
4882 // vastart just stores the address of the VarArgsFrameIndex slot into the
4883 // memory location argument.
4884 SDOperand FR = DAG.getFrameIndex(VarArgsFrameIndex, getPointerTy());
4885 return DAG.getStore(Op.getOperand(0), FR,Op.getOperand(1), SV, 0);
4889 // gp_offset (0 - 6 * 8)
4890 // fp_offset (48 - 48 + 8 * 16)
4891 // overflow_arg_area (point to parameters coming in memory).
4893 SmallVector<SDOperand, 8> MemOps;
4894 SDOperand FIN = Op.getOperand(1);
4896 SDOperand Store = DAG.getStore(Op.getOperand(0),
4897 DAG.getConstant(VarArgsGPOffset, MVT::i32),
4899 MemOps.push_back(Store);
4902 FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN, DAG.getIntPtrConstant(4));
4903 Store = DAG.getStore(Op.getOperand(0),
4904 DAG.getConstant(VarArgsFPOffset, MVT::i32),
4906 MemOps.push_back(Store);
4908 // Store ptr to overflow_arg_area
4909 FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN, DAG.getIntPtrConstant(4));
4910 SDOperand OVFIN = DAG.getFrameIndex(VarArgsFrameIndex, getPointerTy());
4911 Store = DAG.getStore(Op.getOperand(0), OVFIN, FIN, SV, 0);
4912 MemOps.push_back(Store);
4914 // Store ptr to reg_save_area.
4915 FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN, DAG.getIntPtrConstant(8));
4916 SDOperand RSFIN = DAG.getFrameIndex(RegSaveFrameIndex, getPointerTy());
4917 Store = DAG.getStore(Op.getOperand(0), RSFIN, FIN, SV, 0);
4918 MemOps.push_back(Store);
4919 return DAG.getNode(ISD::TokenFactor, MVT::Other, &MemOps[0], MemOps.size());
4922 SDOperand X86TargetLowering::LowerVACOPY(SDOperand Op, SelectionDAG &DAG) {
4923 // X86-64 va_list is a struct { i32, i32, i8*, i8* }.
4924 SDOperand Chain = Op.getOperand(0);
4925 SDOperand DstPtr = Op.getOperand(1);
4926 SDOperand SrcPtr = Op.getOperand(2);
4927 const Value *DstSV = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
4928 const Value *SrcSV = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
4930 SrcPtr = DAG.getLoad(getPointerTy(), Chain, SrcPtr, SrcSV, 0);
4931 Chain = SrcPtr.getValue(1);
4932 for (unsigned i = 0; i < 3; ++i) {
4933 SDOperand Val = DAG.getLoad(MVT::i64, Chain, SrcPtr, SrcSV, 0);
4934 Chain = Val.getValue(1);
4935 Chain = DAG.getStore(Chain, Val, DstPtr, DstSV, 0);
4938 SrcPtr = DAG.getNode(ISD::ADD, getPointerTy(), SrcPtr,
4939 DAG.getIntPtrConstant(8));
4940 DstPtr = DAG.getNode(ISD::ADD, getPointerTy(), DstPtr,
4941 DAG.getIntPtrConstant(8));
4947 X86TargetLowering::LowerINTRINSIC_WO_CHAIN(SDOperand Op, SelectionDAG &DAG) {
4948 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getValue();
4950 default: return SDOperand(); // Don't custom lower most intrinsics.
4951 // Comparison intrinsics.
4952 case Intrinsic::x86_sse_comieq_ss:
4953 case Intrinsic::x86_sse_comilt_ss:
4954 case Intrinsic::x86_sse_comile_ss:
4955 case Intrinsic::x86_sse_comigt_ss:
4956 case Intrinsic::x86_sse_comige_ss:
4957 case Intrinsic::x86_sse_comineq_ss:
4958 case Intrinsic::x86_sse_ucomieq_ss:
4959 case Intrinsic::x86_sse_ucomilt_ss:
4960 case Intrinsic::x86_sse_ucomile_ss:
4961 case Intrinsic::x86_sse_ucomigt_ss:
4962 case Intrinsic::x86_sse_ucomige_ss:
4963 case Intrinsic::x86_sse_ucomineq_ss:
4964 case Intrinsic::x86_sse2_comieq_sd:
4965 case Intrinsic::x86_sse2_comilt_sd:
4966 case Intrinsic::x86_sse2_comile_sd:
4967 case Intrinsic::x86_sse2_comigt_sd:
4968 case Intrinsic::x86_sse2_comige_sd:
4969 case Intrinsic::x86_sse2_comineq_sd:
4970 case Intrinsic::x86_sse2_ucomieq_sd:
4971 case Intrinsic::x86_sse2_ucomilt_sd:
4972 case Intrinsic::x86_sse2_ucomile_sd:
4973 case Intrinsic::x86_sse2_ucomigt_sd:
4974 case Intrinsic::x86_sse2_ucomige_sd:
4975 case Intrinsic::x86_sse2_ucomineq_sd: {
4977 ISD::CondCode CC = ISD::SETCC_INVALID;
4980 case Intrinsic::x86_sse_comieq_ss:
4981 case Intrinsic::x86_sse2_comieq_sd:
4985 case Intrinsic::x86_sse_comilt_ss:
4986 case Intrinsic::x86_sse2_comilt_sd:
4990 case Intrinsic::x86_sse_comile_ss:
4991 case Intrinsic::x86_sse2_comile_sd:
4995 case Intrinsic::x86_sse_comigt_ss:
4996 case Intrinsic::x86_sse2_comigt_sd:
5000 case Intrinsic::x86_sse_comige_ss:
5001 case Intrinsic::x86_sse2_comige_sd:
5005 case Intrinsic::x86_sse_comineq_ss:
5006 case Intrinsic::x86_sse2_comineq_sd:
5010 case Intrinsic::x86_sse_ucomieq_ss:
5011 case Intrinsic::x86_sse2_ucomieq_sd:
5012 Opc = X86ISD::UCOMI;
5015 case Intrinsic::x86_sse_ucomilt_ss:
5016 case Intrinsic::x86_sse2_ucomilt_sd:
5017 Opc = X86ISD::UCOMI;
5020 case Intrinsic::x86_sse_ucomile_ss:
5021 case Intrinsic::x86_sse2_ucomile_sd:
5022 Opc = X86ISD::UCOMI;
5025 case Intrinsic::x86_sse_ucomigt_ss:
5026 case Intrinsic::x86_sse2_ucomigt_sd:
5027 Opc = X86ISD::UCOMI;
5030 case Intrinsic::x86_sse_ucomige_ss:
5031 case Intrinsic::x86_sse2_ucomige_sd:
5032 Opc = X86ISD::UCOMI;
5035 case Intrinsic::x86_sse_ucomineq_ss:
5036 case Intrinsic::x86_sse2_ucomineq_sd:
5037 Opc = X86ISD::UCOMI;
5043 SDOperand LHS = Op.getOperand(1);
5044 SDOperand RHS = Op.getOperand(2);
5045 translateX86CC(CC, true, X86CC, LHS, RHS, DAG);
5047 SDOperand Cond = DAG.getNode(Opc, MVT::i32, LHS, RHS);
5048 SDOperand SetCC = DAG.getNode(X86ISD::SETCC, MVT::i8,
5049 DAG.getConstant(X86CC, MVT::i8), Cond);
5050 return DAG.getNode(ISD::ANY_EXTEND, MVT::i32, SetCC);
5055 SDOperand X86TargetLowering::LowerRETURNADDR(SDOperand Op, SelectionDAG &DAG) {
5056 // Depths > 0 not supported yet!
5057 if (cast<ConstantSDNode>(Op.getOperand(0))->getValue() > 0)
5060 // Just load the return address
5061 SDOperand RetAddrFI = getReturnAddressFrameIndex(DAG);
5062 return DAG.getLoad(getPointerTy(), DAG.getEntryNode(), RetAddrFI, NULL, 0);
5065 SDOperand X86TargetLowering::LowerFRAMEADDR(SDOperand Op, SelectionDAG &DAG) {
5066 // Depths > 0 not supported yet!
5067 if (cast<ConstantSDNode>(Op.getOperand(0))->getValue() > 0)
5070 SDOperand RetAddrFI = getReturnAddressFrameIndex(DAG);
5071 return DAG.getNode(ISD::SUB, getPointerTy(), RetAddrFI,
5072 DAG.getIntPtrConstant(4));
5075 SDOperand X86TargetLowering::LowerFRAME_TO_ARGS_OFFSET(SDOperand Op,
5076 SelectionDAG &DAG) {
5077 // Is not yet supported on x86-64
5078 if (Subtarget->is64Bit())
5081 return DAG.getIntPtrConstant(8);
5084 SDOperand X86TargetLowering::LowerEH_RETURN(SDOperand Op, SelectionDAG &DAG)
5086 assert(!Subtarget->is64Bit() &&
5087 "Lowering of eh_return builtin is not supported yet on x86-64");
5089 MachineFunction &MF = DAG.getMachineFunction();
5090 SDOperand Chain = Op.getOperand(0);
5091 SDOperand Offset = Op.getOperand(1);
5092 SDOperand Handler = Op.getOperand(2);
5094 SDOperand Frame = DAG.getRegister(RegInfo->getFrameRegister(MF),
5097 SDOperand StoreAddr = DAG.getNode(ISD::SUB, getPointerTy(), Frame,
5098 DAG.getIntPtrConstant(-4UL));
5099 StoreAddr = DAG.getNode(ISD::ADD, getPointerTy(), StoreAddr, Offset);
5100 Chain = DAG.getStore(Chain, Handler, StoreAddr, NULL, 0);
5101 Chain = DAG.getCopyToReg(Chain, X86::ECX, StoreAddr);
5102 MF.getRegInfo().addLiveOut(X86::ECX);
5104 return DAG.getNode(X86ISD::EH_RETURN, MVT::Other,
5105 Chain, DAG.getRegister(X86::ECX, getPointerTy()));
5108 SDOperand X86TargetLowering::LowerTRAMPOLINE(SDOperand Op,
5109 SelectionDAG &DAG) {
5110 SDOperand Root = Op.getOperand(0);
5111 SDOperand Trmp = Op.getOperand(1); // trampoline
5112 SDOperand FPtr = Op.getOperand(2); // nested function
5113 SDOperand Nest = Op.getOperand(3); // 'nest' parameter value
5115 const Value *TrmpAddr = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
5117 const X86InstrInfo *TII =
5118 ((X86TargetMachine&)getTargetMachine()).getInstrInfo();
5120 if (Subtarget->is64Bit()) {
5121 SDOperand OutChains[6];
5123 // Large code-model.
5125 const unsigned char JMP64r = TII->getBaseOpcodeFor(X86::JMP64r);
5126 const unsigned char MOV64ri = TII->getBaseOpcodeFor(X86::MOV64ri);
5128 const unsigned char N86R10 =
5129 ((const X86RegisterInfo*)RegInfo)->getX86RegNum(X86::R10);
5130 const unsigned char N86R11 =
5131 ((const X86RegisterInfo*)RegInfo)->getX86RegNum(X86::R11);
5133 const unsigned char REX_WB = 0x40 | 0x08 | 0x01; // REX prefix
5135 // Load the pointer to the nested function into R11.
5136 unsigned OpCode = ((MOV64ri | N86R11) << 8) | REX_WB; // movabsq r11
5137 SDOperand Addr = Trmp;
5138 OutChains[0] = DAG.getStore(Root, DAG.getConstant(OpCode, MVT::i16), Addr,
5141 Addr = DAG.getNode(ISD::ADD, MVT::i64, Trmp, DAG.getConstant(2, MVT::i64));
5142 OutChains[1] = DAG.getStore(Root, FPtr, Addr, TrmpAddr, 2, false, 2);
5144 // Load the 'nest' parameter value into R10.
5145 // R10 is specified in X86CallingConv.td
5146 OpCode = ((MOV64ri | N86R10) << 8) | REX_WB; // movabsq r10
5147 Addr = DAG.getNode(ISD::ADD, MVT::i64, Trmp, DAG.getConstant(10, MVT::i64));
5148 OutChains[2] = DAG.getStore(Root, DAG.getConstant(OpCode, MVT::i16), Addr,
5151 Addr = DAG.getNode(ISD::ADD, MVT::i64, Trmp, DAG.getConstant(12, MVT::i64));
5152 OutChains[3] = DAG.getStore(Root, Nest, Addr, TrmpAddr, 12, false, 2);
5154 // Jump to the nested function.
5155 OpCode = (JMP64r << 8) | REX_WB; // jmpq *...
5156 Addr = DAG.getNode(ISD::ADD, MVT::i64, Trmp, DAG.getConstant(20, MVT::i64));
5157 OutChains[4] = DAG.getStore(Root, DAG.getConstant(OpCode, MVT::i16), Addr,
5160 unsigned char ModRM = N86R11 | (4 << 3) | (3 << 6); // ...r11
5161 Addr = DAG.getNode(ISD::ADD, MVT::i64, Trmp, DAG.getConstant(22, MVT::i64));
5162 OutChains[5] = DAG.getStore(Root, DAG.getConstant(ModRM, MVT::i8), Addr,
5166 { Trmp, DAG.getNode(ISD::TokenFactor, MVT::Other, OutChains, 6) };
5167 return DAG.getNode(ISD::MERGE_VALUES, Op.Val->getVTList(), Ops, 2);
5169 const Function *Func =
5170 cast<Function>(cast<SrcValueSDNode>(Op.getOperand(5))->getValue());
5171 unsigned CC = Func->getCallingConv();
5176 assert(0 && "Unsupported calling convention");
5177 case CallingConv::C:
5178 case CallingConv::X86_StdCall: {
5179 // Pass 'nest' parameter in ECX.
5180 // Must be kept in sync with X86CallingConv.td
5183 // Check that ECX wasn't needed by an 'inreg' parameter.
5184 const FunctionType *FTy = Func->getFunctionType();
5185 const ParamAttrsList *Attrs = Func->getParamAttrs();
5187 if (Attrs && !Func->isVarArg()) {
5188 unsigned InRegCount = 0;
5191 for (FunctionType::param_iterator I = FTy->param_begin(),
5192 E = FTy->param_end(); I != E; ++I, ++Idx)
5193 if (Attrs->paramHasAttr(Idx, ParamAttr::InReg))
5194 // FIXME: should only count parameters that are lowered to integers.
5195 InRegCount += (getTargetData()->getTypeSizeInBits(*I) + 31) / 32;
5197 if (InRegCount > 2) {
5198 cerr << "Nest register in use - reduce number of inreg parameters!\n";
5204 case CallingConv::X86_FastCall:
5205 // Pass 'nest' parameter in EAX.
5206 // Must be kept in sync with X86CallingConv.td
5211 SDOperand OutChains[4];
5212 SDOperand Addr, Disp;
5214 Addr = DAG.getNode(ISD::ADD, MVT::i32, Trmp, DAG.getConstant(10, MVT::i32));
5215 Disp = DAG.getNode(ISD::SUB, MVT::i32, FPtr, Addr);
5217 const unsigned char MOV32ri = TII->getBaseOpcodeFor(X86::MOV32ri);
5218 const unsigned char N86Reg =
5219 ((const X86RegisterInfo*)RegInfo)->getX86RegNum(NestReg);
5220 OutChains[0] = DAG.getStore(Root, DAG.getConstant(MOV32ri|N86Reg, MVT::i8),
5223 Addr = DAG.getNode(ISD::ADD, MVT::i32, Trmp, DAG.getConstant(1, MVT::i32));
5224 OutChains[1] = DAG.getStore(Root, Nest, Addr, TrmpAddr, 1, false, 1);
5226 const unsigned char JMP = TII->getBaseOpcodeFor(X86::JMP);
5227 Addr = DAG.getNode(ISD::ADD, MVT::i32, Trmp, DAG.getConstant(5, MVT::i32));
5228 OutChains[2] = DAG.getStore(Root, DAG.getConstant(JMP, MVT::i8), Addr,
5229 TrmpAddr, 5, false, 1);
5231 Addr = DAG.getNode(ISD::ADD, MVT::i32, Trmp, DAG.getConstant(6, MVT::i32));
5232 OutChains[3] = DAG.getStore(Root, Disp, Addr, TrmpAddr, 6, false, 1);
5235 { Trmp, DAG.getNode(ISD::TokenFactor, MVT::Other, OutChains, 4) };
5236 return DAG.getNode(ISD::MERGE_VALUES, Op.Val->getVTList(), Ops, 2);
5240 SDOperand X86TargetLowering::LowerFLT_ROUNDS_(SDOperand Op, SelectionDAG &DAG) {
5242 The rounding mode is in bits 11:10 of FPSR, and has the following
5249 FLT_ROUNDS, on the other hand, expects the following:
5256 To perform the conversion, we do:
5257 (((((FPSR & 0x800) >> 11) | ((FPSR & 0x400) >> 9)) + 1) & 3)
5260 MachineFunction &MF = DAG.getMachineFunction();
5261 const TargetMachine &TM = MF.getTarget();
5262 const TargetFrameInfo &TFI = *TM.getFrameInfo();
5263 unsigned StackAlignment = TFI.getStackAlignment();
5264 MVT::ValueType VT = Op.getValueType();
5266 // Save FP Control Word to stack slot
5267 int SSFI = MF.getFrameInfo()->CreateStackObject(2, StackAlignment);
5268 SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
5270 SDOperand Chain = DAG.getNode(X86ISD::FNSTCW16m, MVT::Other,
5271 DAG.getEntryNode(), StackSlot);
5273 // Load FP Control Word from stack slot
5274 SDOperand CWD = DAG.getLoad(MVT::i16, Chain, StackSlot, NULL, 0);
5276 // Transform as necessary
5278 DAG.getNode(ISD::SRL, MVT::i16,
5279 DAG.getNode(ISD::AND, MVT::i16,
5280 CWD, DAG.getConstant(0x800, MVT::i16)),
5281 DAG.getConstant(11, MVT::i8));
5283 DAG.getNode(ISD::SRL, MVT::i16,
5284 DAG.getNode(ISD::AND, MVT::i16,
5285 CWD, DAG.getConstant(0x400, MVT::i16)),
5286 DAG.getConstant(9, MVT::i8));
5289 DAG.getNode(ISD::AND, MVT::i16,
5290 DAG.getNode(ISD::ADD, MVT::i16,
5291 DAG.getNode(ISD::OR, MVT::i16, CWD1, CWD2),
5292 DAG.getConstant(1, MVT::i16)),
5293 DAG.getConstant(3, MVT::i16));
5296 return DAG.getNode((MVT::getSizeInBits(VT) < 16 ?
5297 ISD::TRUNCATE : ISD::ZERO_EXTEND), VT, RetVal);
5300 SDOperand X86TargetLowering::LowerCTLZ(SDOperand Op, SelectionDAG &DAG) {
5301 MVT::ValueType VT = Op.getValueType();
5302 MVT::ValueType OpVT = VT;
5303 unsigned NumBits = MVT::getSizeInBits(VT);
5305 Op = Op.getOperand(0);
5306 if (VT == MVT::i8) {
5307 // Zero extend to i32 since there is not an i8 bsr.
5309 Op = DAG.getNode(ISD::ZERO_EXTEND, OpVT, Op);
5312 // Issue a bsr (scan bits in reverse) which also sets EFLAGS.
5313 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
5314 Op = DAG.getNode(X86ISD::BSR, VTs, Op);
5316 // If src is zero (i.e. bsr sets ZF), returns NumBits.
5317 SmallVector<SDOperand, 4> Ops;
5319 Ops.push_back(DAG.getConstant(NumBits+NumBits-1, OpVT));
5320 Ops.push_back(DAG.getConstant(X86::COND_E, MVT::i8));
5321 Ops.push_back(Op.getValue(1));
5322 Op = DAG.getNode(X86ISD::CMOV, OpVT, &Ops[0], 4);
5324 // Finally xor with NumBits-1.
5325 Op = DAG.getNode(ISD::XOR, OpVT, Op, DAG.getConstant(NumBits-1, OpVT));
5328 Op = DAG.getNode(ISD::TRUNCATE, MVT::i8, Op);
5332 SDOperand X86TargetLowering::LowerCTTZ(SDOperand Op, SelectionDAG &DAG) {
5333 MVT::ValueType VT = Op.getValueType();
5334 MVT::ValueType OpVT = VT;
5335 unsigned NumBits = MVT::getSizeInBits(VT);
5337 Op = Op.getOperand(0);
5338 if (VT == MVT::i8) {
5340 Op = DAG.getNode(ISD::ZERO_EXTEND, OpVT, Op);
5343 // Issue a bsf (scan bits forward) which also sets EFLAGS.
5344 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
5345 Op = DAG.getNode(X86ISD::BSF, VTs, Op);
5347 // If src is zero (i.e. bsf sets ZF), returns NumBits.
5348 SmallVector<SDOperand, 4> Ops;
5350 Ops.push_back(DAG.getConstant(NumBits, OpVT));
5351 Ops.push_back(DAG.getConstant(X86::COND_E, MVT::i8));
5352 Ops.push_back(Op.getValue(1));
5353 Op = DAG.getNode(X86ISD::CMOV, OpVT, &Ops[0], 4);
5356 Op = DAG.getNode(ISD::TRUNCATE, MVT::i8, Op);
5360 SDOperand X86TargetLowering::LowerLCS(SDOperand Op, SelectionDAG &DAG) {
5361 MVT::ValueType T = cast<AtomicSDNode>(Op.Val)->getVT();
5365 case MVT::i8: Reg = X86::AL; size = 1; break;
5366 case MVT::i16: Reg = X86::AX; size = 2; break;
5367 case MVT::i32: Reg = X86::EAX; size = 4; break;
5369 if (Subtarget->is64Bit()) {
5370 Reg = X86::RAX; size = 8;
5371 } else //Should go away when LowerType stuff lands
5372 return SDOperand(ExpandATOMIC_LCS(Op.Val, DAG), 0);
5375 SDOperand cpIn = DAG.getCopyToReg(Op.getOperand(0), Reg,
5376 Op.getOperand(3), SDOperand());
5377 SDOperand Ops[] = { cpIn.getValue(0),
5380 DAG.getTargetConstant(size, MVT::i8),
5382 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
5383 SDOperand Result = DAG.getNode(X86ISD::LCMPXCHG_DAG, Tys, Ops, 5);
5385 DAG.getCopyFromReg(Result.getValue(0), Reg, T, Result.getValue(1));
5389 SDNode* X86TargetLowering::ExpandATOMIC_LCS(SDNode* Op, SelectionDAG &DAG) {
5390 MVT::ValueType T = cast<AtomicSDNode>(Op)->getVT();
5391 assert (T == MVT::i64 && "Only know how to expand i64 CAS");
5392 SDOperand cpInL, cpInH;
5393 cpInL = DAG.getNode(ISD::EXTRACT_ELEMENT, MVT::i32, Op->getOperand(3),
5394 DAG.getConstant(0, MVT::i32));
5395 cpInH = DAG.getNode(ISD::EXTRACT_ELEMENT, MVT::i32, Op->getOperand(3),
5396 DAG.getConstant(1, MVT::i32));
5397 cpInL = DAG.getCopyToReg(Op->getOperand(0), X86::EAX,
5398 cpInL, SDOperand());
5399 cpInH = DAG.getCopyToReg(cpInL.getValue(0), X86::EDX,
5400 cpInH, cpInL.getValue(1));
5401 SDOperand swapInL, swapInH;
5402 swapInL = DAG.getNode(ISD::EXTRACT_ELEMENT, MVT::i32, Op->getOperand(2),
5403 DAG.getConstant(0, MVT::i32));
5404 swapInH = DAG.getNode(ISD::EXTRACT_ELEMENT, MVT::i32, Op->getOperand(2),
5405 DAG.getConstant(1, MVT::i32));
5406 swapInL = DAG.getCopyToReg(cpInH.getValue(0), X86::EBX,
5407 swapInL, cpInH.getValue(1));
5408 swapInH = DAG.getCopyToReg(swapInL.getValue(0), X86::ECX,
5409 swapInH, swapInL.getValue(1));
5410 SDOperand Ops[] = { swapInH.getValue(0),
5412 swapInH.getValue(1)};
5413 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
5414 SDOperand Result = DAG.getNode(X86ISD::LCMPXCHG8_DAG, Tys, Ops, 3);
5415 SDOperand cpOutL = DAG.getCopyFromReg(Result.getValue(0), X86::EAX, MVT::i32,
5416 Result.getValue(1));
5417 SDOperand cpOutH = DAG.getCopyFromReg(cpOutL.getValue(1), X86::EDX, MVT::i32,
5418 cpOutL.getValue(2));
5419 SDOperand OpsF[] = { cpOutL.getValue(0), cpOutH.getValue(0)};
5420 SDOperand ResultVal = DAG.getNode(ISD::BUILD_PAIR, MVT::i64, OpsF, 2);
5421 Tys = DAG.getVTList(MVT::i64, MVT::Other);
5422 return DAG.getNode(ISD::MERGE_VALUES, Tys, ResultVal, cpOutH.getValue(1)).Val;
5425 /// LowerOperation - Provide custom lowering hooks for some operations.
5427 SDOperand X86TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
5428 switch (Op.getOpcode()) {
5429 default: assert(0 && "Should not custom lower this!");
5430 case ISD::ATOMIC_LCS: return LowerLCS(Op,DAG);
5431 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG);
5432 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
5433 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
5434 case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
5435 case ISD::SCALAR_TO_VECTOR: return LowerSCALAR_TO_VECTOR(Op, DAG);
5436 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
5437 case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
5438 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
5439 case ISD::ExternalSymbol: return LowerExternalSymbol(Op, DAG);
5440 case ISD::SHL_PARTS:
5441 case ISD::SRA_PARTS:
5442 case ISD::SRL_PARTS: return LowerShift(Op, DAG);
5443 case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
5444 case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
5445 case ISD::FABS: return LowerFABS(Op, DAG);
5446 case ISD::FNEG: return LowerFNEG(Op, DAG);
5447 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
5448 case ISD::SETCC: return LowerSETCC(Op, DAG);
5449 case ISD::SELECT: return LowerSELECT(Op, DAG);
5450 case ISD::BRCOND: return LowerBRCOND(Op, DAG);
5451 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
5452 case ISD::CALL: return LowerCALL(Op, DAG);
5453 case ISD::RET: return LowerRET(Op, DAG);
5454 case ISD::FORMAL_ARGUMENTS: return LowerFORMAL_ARGUMENTS(Op, DAG);
5455 case ISD::MEMSET: return LowerMEMSET(Op, DAG);
5456 case ISD::MEMCPY: return LowerMEMCPY(Op, DAG);
5457 case ISD::VASTART: return LowerVASTART(Op, DAG);
5458 case ISD::VACOPY: return LowerVACOPY(Op, DAG);
5459 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
5460 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
5461 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
5462 case ISD::FRAME_TO_ARGS_OFFSET:
5463 return LowerFRAME_TO_ARGS_OFFSET(Op, DAG);
5464 case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
5465 case ISD::EH_RETURN: return LowerEH_RETURN(Op, DAG);
5466 case ISD::TRAMPOLINE: return LowerTRAMPOLINE(Op, DAG);
5467 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
5468 case ISD::CTLZ: return LowerCTLZ(Op, DAG);
5469 case ISD::CTTZ: return LowerCTTZ(Op, DAG);
5471 // FIXME: REMOVE THIS WHEN LegalizeDAGTypes lands.
5472 case ISD::READCYCLECOUNTER:
5473 return SDOperand(ExpandREADCYCLECOUNTER(Op.Val, DAG), 0);
5477 /// ExpandOperation - Provide custom lowering hooks for expanding operations.
5478 SDNode *X86TargetLowering::ExpandOperationResult(SDNode *N, SelectionDAG &DAG) {
5479 switch (N->getOpcode()) {
5480 default: assert(0 && "Should not custom lower this!");
5481 case ISD::FP_TO_SINT: return ExpandFP_TO_SINT(N, DAG);
5482 case ISD::READCYCLECOUNTER: return ExpandREADCYCLECOUNTER(N, DAG);
5483 case ISD::ATOMIC_LCS: return ExpandATOMIC_LCS(N, DAG);
5487 const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const {
5489 default: return NULL;
5490 case X86ISD::BSF: return "X86ISD::BSF";
5491 case X86ISD::BSR: return "X86ISD::BSR";
5492 case X86ISD::SHLD: return "X86ISD::SHLD";
5493 case X86ISD::SHRD: return "X86ISD::SHRD";
5494 case X86ISD::FAND: return "X86ISD::FAND";
5495 case X86ISD::FOR: return "X86ISD::FOR";
5496 case X86ISD::FXOR: return "X86ISD::FXOR";
5497 case X86ISD::FSRL: return "X86ISD::FSRL";
5498 case X86ISD::FILD: return "X86ISD::FILD";
5499 case X86ISD::FILD_FLAG: return "X86ISD::FILD_FLAG";
5500 case X86ISD::FP_TO_INT16_IN_MEM: return "X86ISD::FP_TO_INT16_IN_MEM";
5501 case X86ISD::FP_TO_INT32_IN_MEM: return "X86ISD::FP_TO_INT32_IN_MEM";
5502 case X86ISD::FP_TO_INT64_IN_MEM: return "X86ISD::FP_TO_INT64_IN_MEM";
5503 case X86ISD::FLD: return "X86ISD::FLD";
5504 case X86ISD::FST: return "X86ISD::FST";
5505 case X86ISD::FP_GET_RESULT: return "X86ISD::FP_GET_RESULT";
5506 case X86ISD::FP_GET_RESULT2: return "X86ISD::FP_GET_RESULT2";
5507 case X86ISD::FP_SET_RESULT: return "X86ISD::FP_SET_RESULT";
5508 case X86ISD::CALL: return "X86ISD::CALL";
5509 case X86ISD::TAILCALL: return "X86ISD::TAILCALL";
5510 case X86ISD::RDTSC_DAG: return "X86ISD::RDTSC_DAG";
5511 case X86ISD::CMP: return "X86ISD::CMP";
5512 case X86ISD::COMI: return "X86ISD::COMI";
5513 case X86ISD::UCOMI: return "X86ISD::UCOMI";
5514 case X86ISD::SETCC: return "X86ISD::SETCC";
5515 case X86ISD::CMOV: return "X86ISD::CMOV";
5516 case X86ISD::BRCOND: return "X86ISD::BRCOND";
5517 case X86ISD::RET_FLAG: return "X86ISD::RET_FLAG";
5518 case X86ISD::REP_STOS: return "X86ISD::REP_STOS";
5519 case X86ISD::REP_MOVS: return "X86ISD::REP_MOVS";
5520 case X86ISD::GlobalBaseReg: return "X86ISD::GlobalBaseReg";
5521 case X86ISD::Wrapper: return "X86ISD::Wrapper";
5522 case X86ISD::PEXTRB: return "X86ISD::PEXTRB";
5523 case X86ISD::PEXTRW: return "X86ISD::PEXTRW";
5524 case X86ISD::INSERTPS: return "X86ISD::INSERTPS";
5525 case X86ISD::PINSRB: return "X86ISD::PINSRB";
5526 case X86ISD::PINSRW: return "X86ISD::PINSRW";
5527 case X86ISD::FMAX: return "X86ISD::FMAX";
5528 case X86ISD::FMIN: return "X86ISD::FMIN";
5529 case X86ISD::FRSQRT: return "X86ISD::FRSQRT";
5530 case X86ISD::FRCP: return "X86ISD::FRCP";
5531 case X86ISD::TLSADDR: return "X86ISD::TLSADDR";
5532 case X86ISD::THREAD_POINTER: return "X86ISD::THREAD_POINTER";
5533 case X86ISD::EH_RETURN: return "X86ISD::EH_RETURN";
5534 case X86ISD::TC_RETURN: return "X86ISD::TC_RETURN";
5535 case X86ISD::FNSTCW16m: return "X86ISD::FNSTCW16m";
5536 case X86ISD::LCMPXCHG_DAG: return "x86ISD::LCMPXCHG_DAG";
5537 case X86ISD::LCMPXCHG8_DAG: return "x86ISD::LCMPXCHG8_DAG";
5541 // isLegalAddressingMode - Return true if the addressing mode represented
5542 // by AM is legal for this target, for a load/store of the specified type.
5543 bool X86TargetLowering::isLegalAddressingMode(const AddrMode &AM,
5544 const Type *Ty) const {
5545 // X86 supports extremely general addressing modes.
5547 // X86 allows a sign-extended 32-bit immediate field as a displacement.
5548 if (AM.BaseOffs <= -(1LL << 32) || AM.BaseOffs >= (1LL << 32)-1)
5552 // We can only fold this if we don't need an extra load.
5553 if (Subtarget->GVRequiresExtraLoad(AM.BaseGV, getTargetMachine(), false))
5556 // X86-64 only supports addr of globals in small code model.
5557 if (Subtarget->is64Bit()) {
5558 if (getTargetMachine().getCodeModel() != CodeModel::Small)
5560 // If lower 4G is not available, then we must use rip-relative addressing.
5561 if (AM.BaseOffs || AM.Scale > 1)
5572 // These scales always work.
5577 // These scales are formed with basereg+scalereg. Only accept if there is
5582 default: // Other stuff never works.
5590 bool X86TargetLowering::isTruncateFree(const Type *Ty1, const Type *Ty2) const {
5591 if (!Ty1->isInteger() || !Ty2->isInteger())
5593 unsigned NumBits1 = Ty1->getPrimitiveSizeInBits();
5594 unsigned NumBits2 = Ty2->getPrimitiveSizeInBits();
5595 if (NumBits1 <= NumBits2)
5597 return Subtarget->is64Bit() || NumBits1 < 64;
5600 bool X86TargetLowering::isTruncateFree(MVT::ValueType VT1,
5601 MVT::ValueType VT2) const {
5602 if (!MVT::isInteger(VT1) || !MVT::isInteger(VT2))
5604 unsigned NumBits1 = MVT::getSizeInBits(VT1);
5605 unsigned NumBits2 = MVT::getSizeInBits(VT2);
5606 if (NumBits1 <= NumBits2)
5608 return Subtarget->is64Bit() || NumBits1 < 64;
5611 /// isShuffleMaskLegal - Targets can use this to indicate that they only
5612 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
5613 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
5614 /// are assumed to be legal.
5616 X86TargetLowering::isShuffleMaskLegal(SDOperand Mask, MVT::ValueType VT) const {
5617 // Only do shuffles on 128-bit vector types for now.
5618 if (MVT::getSizeInBits(VT) == 64) return false;
5619 return (Mask.Val->getNumOperands() <= 4 ||
5620 isIdentityMask(Mask.Val) ||
5621 isIdentityMask(Mask.Val, true) ||
5622 isSplatMask(Mask.Val) ||
5623 isPSHUFHW_PSHUFLWMask(Mask.Val) ||
5624 X86::isUNPCKLMask(Mask.Val) ||
5625 X86::isUNPCKHMask(Mask.Val) ||
5626 X86::isUNPCKL_v_undef_Mask(Mask.Val) ||
5627 X86::isUNPCKH_v_undef_Mask(Mask.Val));
5630 bool X86TargetLowering::isVectorClearMaskLegal(std::vector<SDOperand> &BVOps,
5632 SelectionDAG &DAG) const {
5633 unsigned NumElts = BVOps.size();
5634 // Only do shuffles on 128-bit vector types for now.
5635 if (MVT::getSizeInBits(EVT) * NumElts == 64) return false;
5636 if (NumElts == 2) return true;
5638 return (isMOVLMask(&BVOps[0], 4) ||
5639 isCommutedMOVL(&BVOps[0], 4, true) ||
5640 isSHUFPMask(&BVOps[0], 4) ||
5641 isCommutedSHUFP(&BVOps[0], 4));
5646 //===----------------------------------------------------------------------===//
5647 // X86 Scheduler Hooks
5648 //===----------------------------------------------------------------------===//
5651 X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
5652 MachineBasicBlock *BB) {
5653 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5654 switch (MI->getOpcode()) {
5655 default: assert(false && "Unexpected instr type to insert");
5656 case X86::CMOV_FR32:
5657 case X86::CMOV_FR64:
5658 case X86::CMOV_V4F32:
5659 case X86::CMOV_V2F64:
5660 case X86::CMOV_V2I64: {
5661 // To "insert" a SELECT_CC instruction, we actually have to insert the
5662 // diamond control-flow pattern. The incoming instruction knows the
5663 // destination vreg to set, the condition code register to branch on, the
5664 // true/false values to select between, and a branch opcode to use.
5665 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5666 ilist<MachineBasicBlock>::iterator It = BB;
5672 // cmpTY ccX, r1, r2
5674 // fallthrough --> copy0MBB
5675 MachineBasicBlock *thisMBB = BB;
5676 MachineBasicBlock *copy0MBB = new MachineBasicBlock(LLVM_BB);
5677 MachineBasicBlock *sinkMBB = new MachineBasicBlock(LLVM_BB);
5679 X86::GetCondBranchFromCond((X86::CondCode)MI->getOperand(3).getImm());
5680 BuildMI(BB, TII->get(Opc)).addMBB(sinkMBB);
5681 MachineFunction *F = BB->getParent();
5682 F->getBasicBlockList().insert(It, copy0MBB);
5683 F->getBasicBlockList().insert(It, sinkMBB);
5684 // Update machine-CFG edges by first adding all successors of the current
5685 // block to the new block which will contain the Phi node for the select.
5686 for(MachineBasicBlock::succ_iterator i = BB->succ_begin(),
5687 e = BB->succ_end(); i != e; ++i)
5688 sinkMBB->addSuccessor(*i);
5689 // Next, remove all successors of the current block, and add the true
5690 // and fallthrough blocks as its successors.
5691 while(!BB->succ_empty())
5692 BB->removeSuccessor(BB->succ_begin());
5693 BB->addSuccessor(copy0MBB);
5694 BB->addSuccessor(sinkMBB);
5697 // %FalseValue = ...
5698 // # fallthrough to sinkMBB
5701 // Update machine-CFG edges
5702 BB->addSuccessor(sinkMBB);
5705 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
5708 BuildMI(BB, TII->get(X86::PHI), MI->getOperand(0).getReg())
5709 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
5710 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
5712 delete MI; // The pseudo instruction is gone now.
5716 case X86::FP32_TO_INT16_IN_MEM:
5717 case X86::FP32_TO_INT32_IN_MEM:
5718 case X86::FP32_TO_INT64_IN_MEM:
5719 case X86::FP64_TO_INT16_IN_MEM:
5720 case X86::FP64_TO_INT32_IN_MEM:
5721 case X86::FP64_TO_INT64_IN_MEM:
5722 case X86::FP80_TO_INT16_IN_MEM:
5723 case X86::FP80_TO_INT32_IN_MEM:
5724 case X86::FP80_TO_INT64_IN_MEM: {
5725 // Change the floating point control register to use "round towards zero"
5726 // mode when truncating to an integer value.
5727 MachineFunction *F = BB->getParent();
5728 int CWFrameIdx = F->getFrameInfo()->CreateStackObject(2, 2);
5729 addFrameReference(BuildMI(BB, TII->get(X86::FNSTCW16m)), CWFrameIdx);
5731 // Load the old value of the high byte of the control word...
5733 F->getRegInfo().createVirtualRegister(X86::GR16RegisterClass);
5734 addFrameReference(BuildMI(BB, TII->get(X86::MOV16rm), OldCW), CWFrameIdx);
5736 // Set the high part to be round to zero...
5737 addFrameReference(BuildMI(BB, TII->get(X86::MOV16mi)), CWFrameIdx)
5740 // Reload the modified control word now...
5741 addFrameReference(BuildMI(BB, TII->get(X86::FLDCW16m)), CWFrameIdx);
5743 // Restore the memory image of control word to original value
5744 addFrameReference(BuildMI(BB, TII->get(X86::MOV16mr)), CWFrameIdx)
5747 // Get the X86 opcode to use.
5749 switch (MI->getOpcode()) {
5750 default: assert(0 && "illegal opcode!");
5751 case X86::FP32_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m32; break;
5752 case X86::FP32_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m32; break;
5753 case X86::FP32_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m32; break;
5754 case X86::FP64_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m64; break;
5755 case X86::FP64_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m64; break;
5756 case X86::FP64_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m64; break;
5757 case X86::FP80_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m80; break;
5758 case X86::FP80_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m80; break;
5759 case X86::FP80_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m80; break;
5763 MachineOperand &Op = MI->getOperand(0);
5764 if (Op.isRegister()) {
5765 AM.BaseType = X86AddressMode::RegBase;
5766 AM.Base.Reg = Op.getReg();
5768 AM.BaseType = X86AddressMode::FrameIndexBase;
5769 AM.Base.FrameIndex = Op.getIndex();
5771 Op = MI->getOperand(1);
5772 if (Op.isImmediate())
5773 AM.Scale = Op.getImm();
5774 Op = MI->getOperand(2);
5775 if (Op.isImmediate())
5776 AM.IndexReg = Op.getImm();
5777 Op = MI->getOperand(3);
5778 if (Op.isGlobalAddress()) {
5779 AM.GV = Op.getGlobal();
5781 AM.Disp = Op.getImm();
5783 addFullAddress(BuildMI(BB, TII->get(Opc)), AM)
5784 .addReg(MI->getOperand(4).getReg());
5786 // Reload the original control word now.
5787 addFrameReference(BuildMI(BB, TII->get(X86::FLDCW16m)), CWFrameIdx);
5789 delete MI; // The pseudo instruction is gone now.
5795 //===----------------------------------------------------------------------===//
5796 // X86 Optimization Hooks
5797 //===----------------------------------------------------------------------===//
5799 void X86TargetLowering::computeMaskedBitsForTargetNode(const SDOperand Op,
5803 const SelectionDAG &DAG,
5804 unsigned Depth) const {
5805 unsigned Opc = Op.getOpcode();
5806 assert((Opc >= ISD::BUILTIN_OP_END ||
5807 Opc == ISD::INTRINSIC_WO_CHAIN ||
5808 Opc == ISD::INTRINSIC_W_CHAIN ||
5809 Opc == ISD::INTRINSIC_VOID) &&
5810 "Should use MaskedValueIsZero if you don't know whether Op"
5811 " is a target node!");
5813 KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0); // Don't know anything.
5817 KnownZero |= APInt::getHighBitsSet(Mask.getBitWidth(),
5818 Mask.getBitWidth() - 1);
5823 /// getShuffleScalarElt - Returns the scalar element that will make up the ith
5824 /// element of the result of the vector shuffle.
5825 static SDOperand getShuffleScalarElt(SDNode *N, unsigned i, SelectionDAG &DAG) {
5826 MVT::ValueType VT = N->getValueType(0);
5827 SDOperand PermMask = N->getOperand(2);
5828 unsigned NumElems = PermMask.getNumOperands();
5829 SDOperand V = (i < NumElems) ? N->getOperand(0) : N->getOperand(1);
5831 if (V.getOpcode() == ISD::SCALAR_TO_VECTOR) {
5833 ? V.getOperand(0) : DAG.getNode(ISD::UNDEF, MVT::getVectorElementType(VT));
5834 } else if (V.getOpcode() == ISD::VECTOR_SHUFFLE) {
5835 SDOperand Idx = PermMask.getOperand(i);
5836 if (Idx.getOpcode() == ISD::UNDEF)
5837 return DAG.getNode(ISD::UNDEF, MVT::getVectorElementType(VT));
5838 return getShuffleScalarElt(V.Val,cast<ConstantSDNode>(Idx)->getValue(),DAG);
5843 /// isGAPlusOffset - Returns true (and the GlobalValue and the offset) if the
5844 /// node is a GlobalAddress + an offset.
5845 static bool isGAPlusOffset(SDNode *N, GlobalValue* &GA, int64_t &Offset) {
5846 unsigned Opc = N->getOpcode();
5847 if (Opc == X86ISD::Wrapper) {
5848 if (dyn_cast<GlobalAddressSDNode>(N->getOperand(0))) {
5849 GA = cast<GlobalAddressSDNode>(N->getOperand(0))->getGlobal();
5852 } else if (Opc == ISD::ADD) {
5853 SDOperand N1 = N->getOperand(0);
5854 SDOperand N2 = N->getOperand(1);
5855 if (isGAPlusOffset(N1.Val, GA, Offset)) {
5856 ConstantSDNode *V = dyn_cast<ConstantSDNode>(N2);
5858 Offset += V->getSignExtended();
5861 } else if (isGAPlusOffset(N2.Val, GA, Offset)) {
5862 ConstantSDNode *V = dyn_cast<ConstantSDNode>(N1);
5864 Offset += V->getSignExtended();
5872 /// isConsecutiveLoad - Returns true if N is loading from an address of Base
5874 static bool isConsecutiveLoad(SDNode *N, SDNode *Base, int Dist, int Size,
5875 MachineFrameInfo *MFI) {
5876 if (N->getOperand(0).Val != Base->getOperand(0).Val)
5879 SDOperand Loc = N->getOperand(1);
5880 SDOperand BaseLoc = Base->getOperand(1);
5881 if (Loc.getOpcode() == ISD::FrameIndex) {
5882 if (BaseLoc.getOpcode() != ISD::FrameIndex)
5884 int FI = cast<FrameIndexSDNode>(Loc)->getIndex();
5885 int BFI = cast<FrameIndexSDNode>(BaseLoc)->getIndex();
5886 int FS = MFI->getObjectSize(FI);
5887 int BFS = MFI->getObjectSize(BFI);
5888 if (FS != BFS || FS != Size) return false;
5889 return MFI->getObjectOffset(FI) == (MFI->getObjectOffset(BFI) + Dist*Size);
5891 GlobalValue *GV1 = NULL;
5892 GlobalValue *GV2 = NULL;
5893 int64_t Offset1 = 0;
5894 int64_t Offset2 = 0;
5895 bool isGA1 = isGAPlusOffset(Loc.Val, GV1, Offset1);
5896 bool isGA2 = isGAPlusOffset(BaseLoc.Val, GV2, Offset2);
5897 if (isGA1 && isGA2 && GV1 == GV2)
5898 return Offset1 == (Offset2 + Dist*Size);
5904 static bool isBaseAlignment16(SDNode *Base, MachineFrameInfo *MFI,
5905 const X86Subtarget *Subtarget) {
5908 if (isGAPlusOffset(Base, GV, Offset))
5909 return (GV->getAlignment() >= 16 && (Offset % 16) == 0);
5910 // DAG combine handles the stack object case.
5915 /// PerformShuffleCombine - Combine a vector_shuffle that is equal to
5916 /// build_vector load1, load2, load3, load4, <0, 1, 2, 3> into a 128-bit load
5917 /// if the load addresses are consecutive, non-overlapping, and in the right
5919 static SDOperand PerformShuffleCombine(SDNode *N, SelectionDAG &DAG,
5920 const X86Subtarget *Subtarget) {
5921 MachineFunction &MF = DAG.getMachineFunction();
5922 MachineFrameInfo *MFI = MF.getFrameInfo();
5923 MVT::ValueType VT = N->getValueType(0);
5924 MVT::ValueType EVT = MVT::getVectorElementType(VT);
5925 SDOperand PermMask = N->getOperand(2);
5926 int NumElems = (int)PermMask.getNumOperands();
5927 SDNode *Base = NULL;
5928 for (int i = 0; i < NumElems; ++i) {
5929 SDOperand Idx = PermMask.getOperand(i);
5930 if (Idx.getOpcode() == ISD::UNDEF) {
5931 if (!Base) return SDOperand();
5934 getShuffleScalarElt(N, cast<ConstantSDNode>(Idx)->getValue(), DAG);
5935 if (!Arg.Val || !ISD::isNON_EXTLoad(Arg.Val))
5939 else if (!isConsecutiveLoad(Arg.Val, Base,
5940 i, MVT::getSizeInBits(EVT)/8,MFI))
5945 bool isAlign16 = isBaseAlignment16(Base->getOperand(1).Val, MFI, Subtarget);
5946 LoadSDNode *LD = cast<LoadSDNode>(Base);
5948 return DAG.getLoad(VT, LD->getChain(), LD->getBasePtr(), LD->getSrcValue(),
5949 LD->getSrcValueOffset(), LD->isVolatile());
5951 return DAG.getLoad(VT, LD->getChain(), LD->getBasePtr(), LD->getSrcValue(),
5952 LD->getSrcValueOffset(), LD->isVolatile(),
5953 LD->getAlignment());
5957 /// PerformSELECTCombine - Do target-specific dag combines on SELECT nodes.
5958 static SDOperand PerformSELECTCombine(SDNode *N, SelectionDAG &DAG,
5959 const X86Subtarget *Subtarget) {
5960 SDOperand Cond = N->getOperand(0);
5962 // If we have SSE[12] support, try to form min/max nodes.
5963 if (Subtarget->hasSSE2() &&
5964 (N->getValueType(0) == MVT::f32 || N->getValueType(0) == MVT::f64)) {
5965 if (Cond.getOpcode() == ISD::SETCC) {
5966 // Get the LHS/RHS of the select.
5967 SDOperand LHS = N->getOperand(1);
5968 SDOperand RHS = N->getOperand(2);
5969 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
5971 unsigned Opcode = 0;
5972 if (LHS == Cond.getOperand(0) && RHS == Cond.getOperand(1)) {
5975 case ISD::SETOLE: // (X <= Y) ? X : Y -> min
5978 if (!UnsafeFPMath) break;
5980 case ISD::SETOLT: // (X olt/lt Y) ? X : Y -> min
5982 Opcode = X86ISD::FMIN;
5985 case ISD::SETOGT: // (X > Y) ? X : Y -> max
5988 if (!UnsafeFPMath) break;
5990 case ISD::SETUGE: // (X uge/ge Y) ? X : Y -> max
5992 Opcode = X86ISD::FMAX;
5995 } else if (LHS == Cond.getOperand(1) && RHS == Cond.getOperand(0)) {
5998 case ISD::SETOGT: // (X > Y) ? Y : X -> min
6001 if (!UnsafeFPMath) break;
6003 case ISD::SETUGE: // (X uge/ge Y) ? Y : X -> min
6005 Opcode = X86ISD::FMIN;
6008 case ISD::SETOLE: // (X <= Y) ? Y : X -> max
6011 if (!UnsafeFPMath) break;
6013 case ISD::SETOLT: // (X olt/lt Y) ? Y : X -> max
6015 Opcode = X86ISD::FMAX;
6021 return DAG.getNode(Opcode, N->getValueType(0), LHS, RHS);
6029 /// PerformSTORECombine - Do target-specific dag combines on STORE nodes.
6030 static SDOperand PerformSTORECombine(StoreSDNode *St, SelectionDAG &DAG,
6031 const X86Subtarget *Subtarget) {
6032 // Turn load->store of MMX types into GPR load/stores. This avoids clobbering
6033 // the FP state in cases where an emms may be missing.
6034 // A preferable solution to the general problem is to figure out the right
6035 // places to insert EMMS. This qualifies as a quick hack.
6036 if (MVT::isVector(St->getValue().getValueType()) &&
6037 MVT::getSizeInBits(St->getValue().getValueType()) == 64 &&
6038 isa<LoadSDNode>(St->getValue()) &&
6039 !cast<LoadSDNode>(St->getValue())->isVolatile() &&
6040 St->getChain().hasOneUse() && !St->isVolatile()) {
6041 SDNode* LdVal = St->getValue().Val;
6043 int TokenFactorIndex = -1;
6044 SmallVector<SDOperand, 8> Ops;
6045 SDNode* ChainVal = St->getChain().Val;
6046 // Must be a store of a load. We currently handle two cases: the load
6047 // is a direct child, and it's under an intervening TokenFactor. It is
6048 // possible to dig deeper under nested TokenFactors.
6049 if (ChainVal == LdVal)
6050 Ld = cast<LoadSDNode>(St->getChain());
6051 else if (St->getValue().hasOneUse() &&
6052 ChainVal->getOpcode() == ISD::TokenFactor) {
6053 for (unsigned i=0, e = ChainVal->getNumOperands(); i != e; ++i) {
6054 if (ChainVal->getOperand(i).Val == LdVal) {
6055 TokenFactorIndex = i;
6056 Ld = cast<LoadSDNode>(St->getValue());
6058 Ops.push_back(ChainVal->getOperand(i));
6062 // If we are a 64-bit capable x86, lower to a single movq load/store pair.
6063 if (Subtarget->is64Bit()) {
6064 SDOperand NewLd = DAG.getLoad(MVT::i64, Ld->getChain(),
6065 Ld->getBasePtr(), Ld->getSrcValue(),
6066 Ld->getSrcValueOffset(), Ld->isVolatile(),
6067 Ld->getAlignment());
6068 SDOperand NewChain = NewLd.getValue(1);
6069 if (TokenFactorIndex != -1) {
6070 Ops.push_back(NewLd);
6071 NewChain = DAG.getNode(ISD::TokenFactor, MVT::Other, &Ops[0],
6074 return DAG.getStore(NewChain, NewLd, St->getBasePtr(),
6075 St->getSrcValue(), St->getSrcValueOffset(),
6076 St->isVolatile(), St->getAlignment());
6079 // Otherwise, lower to two 32-bit copies.
6080 SDOperand LoAddr = Ld->getBasePtr();
6081 SDOperand HiAddr = DAG.getNode(ISD::ADD, MVT::i32, LoAddr,
6082 DAG.getConstant(MVT::i32, 4));
6084 SDOperand LoLd = DAG.getLoad(MVT::i32, Ld->getChain(), LoAddr,
6085 Ld->getSrcValue(), Ld->getSrcValueOffset(),
6086 Ld->isVolatile(), Ld->getAlignment());
6087 SDOperand HiLd = DAG.getLoad(MVT::i32, Ld->getChain(), HiAddr,
6088 Ld->getSrcValue(), Ld->getSrcValueOffset()+4,
6090 MinAlign(Ld->getAlignment(), 4));
6092 SDOperand NewChain = LoLd.getValue(1);
6093 if (TokenFactorIndex != -1) {
6094 Ops.push_back(LoLd);
6095 Ops.push_back(HiLd);
6096 NewChain = DAG.getNode(ISD::TokenFactor, MVT::Other, &Ops[0],
6100 LoAddr = St->getBasePtr();
6101 HiAddr = DAG.getNode(ISD::ADD, MVT::i32, LoAddr,
6102 DAG.getConstant(MVT::i32, 4));
6104 SDOperand LoSt = DAG.getStore(NewChain, LoLd, LoAddr,
6105 St->getSrcValue(), St->getSrcValueOffset(),
6106 St->isVolatile(), St->getAlignment());
6107 SDOperand HiSt = DAG.getStore(NewChain, HiLd, HiAddr,
6108 St->getSrcValue(), St->getSrcValueOffset()+4,
6110 MinAlign(St->getAlignment(), 4));
6111 return DAG.getNode(ISD::TokenFactor, MVT::Other, LoSt, HiSt);
6117 /// PerformFORCombine - Do target-specific dag combines on X86ISD::FOR and
6118 /// X86ISD::FXOR nodes.
6119 static SDOperand PerformFORCombine(SDNode *N, SelectionDAG &DAG) {
6120 assert(N->getOpcode() == X86ISD::FOR || N->getOpcode() == X86ISD::FXOR);
6121 // F[X]OR(0.0, x) -> x
6122 // F[X]OR(x, 0.0) -> x
6123 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
6124 if (C->getValueAPF().isPosZero())
6125 return N->getOperand(1);
6126 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
6127 if (C->getValueAPF().isPosZero())
6128 return N->getOperand(0);
6132 /// PerformFANDCombine - Do target-specific dag combines on X86ISD::FAND nodes.
6133 static SDOperand PerformFANDCombine(SDNode *N, SelectionDAG &DAG) {
6134 // FAND(0.0, x) -> 0.0
6135 // FAND(x, 0.0) -> 0.0
6136 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
6137 if (C->getValueAPF().isPosZero())
6138 return N->getOperand(0);
6139 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
6140 if (C->getValueAPF().isPosZero())
6141 return N->getOperand(1);
6146 SDOperand X86TargetLowering::PerformDAGCombine(SDNode *N,
6147 DAGCombinerInfo &DCI) const {
6148 SelectionDAG &DAG = DCI.DAG;
6149 switch (N->getOpcode()) {
6151 case ISD::VECTOR_SHUFFLE: return PerformShuffleCombine(N, DAG, Subtarget);
6152 case ISD::SELECT: return PerformSELECTCombine(N, DAG, Subtarget);
6154 return PerformSTORECombine(cast<StoreSDNode>(N), DAG, Subtarget);
6156 case X86ISD::FOR: return PerformFORCombine(N, DAG);
6157 case X86ISD::FAND: return PerformFANDCombine(N, DAG);
6163 //===----------------------------------------------------------------------===//
6164 // X86 Inline Assembly Support
6165 //===----------------------------------------------------------------------===//
6167 /// getConstraintType - Given a constraint letter, return the type of
6168 /// constraint it is for this target.
6169 X86TargetLowering::ConstraintType
6170 X86TargetLowering::getConstraintType(const std::string &Constraint) const {
6171 if (Constraint.size() == 1) {
6172 switch (Constraint[0]) {
6181 return C_RegisterClass;
6186 return TargetLowering::getConstraintType(Constraint);
6189 /// LowerXConstraint - try to replace an X constraint, which matches anything,
6190 /// with another that has more specific requirements based on the type of the
6191 /// corresponding operand.
6192 void X86TargetLowering::lowerXConstraint(MVT::ValueType ConstraintVT,
6193 std::string& s) const {
6194 if (MVT::isFloatingPoint(ConstraintVT)) {
6195 if (Subtarget->hasSSE2())
6197 else if (Subtarget->hasSSE1())
6202 return TargetLowering::lowerXConstraint(ConstraintVT, s);
6205 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
6206 /// vector. If it is invalid, don't add anything to Ops.
6207 void X86TargetLowering::LowerAsmOperandForConstraint(SDOperand Op,
6209 std::vector<SDOperand>&Ops,
6210 SelectionDAG &DAG) {
6211 SDOperand Result(0, 0);
6213 switch (Constraint) {
6216 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
6217 if (C->getValue() <= 31) {
6218 Result = DAG.getTargetConstant(C->getValue(), Op.getValueType());
6224 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
6225 if (C->getValue() <= 255) {
6226 Result = DAG.getTargetConstant(C->getValue(), Op.getValueType());
6232 // Literal immediates are always ok.
6233 if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(Op)) {
6234 Result = DAG.getTargetConstant(CST->getValue(), Op.getValueType());
6238 // If we are in non-pic codegen mode, we allow the address of a global (with
6239 // an optional displacement) to be used with 'i'.
6240 GlobalAddressSDNode *GA = dyn_cast<GlobalAddressSDNode>(Op);
6243 // Match either (GA) or (GA+C)
6245 Offset = GA->getOffset();
6246 } else if (Op.getOpcode() == ISD::ADD) {
6247 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1));
6248 GA = dyn_cast<GlobalAddressSDNode>(Op.getOperand(0));
6250 Offset = GA->getOffset()+C->getValue();
6252 C = dyn_cast<ConstantSDNode>(Op.getOperand(1));
6253 GA = dyn_cast<GlobalAddressSDNode>(Op.getOperand(0));
6255 Offset = GA->getOffset()+C->getValue();
6262 // If addressing this global requires a load (e.g. in PIC mode), we can't
6264 if (Subtarget->GVRequiresExtraLoad(GA->getGlobal(), getTargetMachine(),
6268 Op = DAG.getTargetGlobalAddress(GA->getGlobal(), GA->getValueType(0),
6274 // Otherwise, not valid for this mode.
6280 Ops.push_back(Result);
6283 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
6286 std::vector<unsigned> X86TargetLowering::
6287 getRegClassForInlineAsmConstraint(const std::string &Constraint,
6288 MVT::ValueType VT) const {
6289 if (Constraint.size() == 1) {
6290 // FIXME: not handling fp-stack yet!
6291 switch (Constraint[0]) { // GCC X86 Constraint Letters
6292 default: break; // Unknown constraint letter
6293 case 'A': // EAX/EDX
6294 if (VT == MVT::i32 || VT == MVT::i64)
6295 return make_vector<unsigned>(X86::EAX, X86::EDX, 0);
6297 case 'q': // Q_REGS (GENERAL_REGS in 64-bit mode)
6300 return make_vector<unsigned>(X86::EAX, X86::EDX, X86::ECX, X86::EBX, 0);
6301 else if (VT == MVT::i16)
6302 return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX, 0);
6303 else if (VT == MVT::i8)
6304 return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::BL, 0);
6305 else if (VT == MVT::i64)
6306 return make_vector<unsigned>(X86::RAX, X86::RDX, X86::RCX, X86::RBX, 0);
6311 return std::vector<unsigned>();
6314 std::pair<unsigned, const TargetRegisterClass*>
6315 X86TargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
6316 MVT::ValueType VT) const {
6317 // First, see if this is a constraint that directly corresponds to an LLVM
6319 if (Constraint.size() == 1) {
6320 // GCC Constraint Letters
6321 switch (Constraint[0]) {
6323 case 'r': // GENERAL_REGS
6324 case 'R': // LEGACY_REGS
6325 case 'l': // INDEX_REGS
6326 if (VT == MVT::i64 && Subtarget->is64Bit())
6327 return std::make_pair(0U, X86::GR64RegisterClass);
6329 return std::make_pair(0U, X86::GR32RegisterClass);
6330 else if (VT == MVT::i16)
6331 return std::make_pair(0U, X86::GR16RegisterClass);
6332 else if (VT == MVT::i8)
6333 return std::make_pair(0U, X86::GR8RegisterClass);
6335 case 'y': // MMX_REGS if MMX allowed.
6336 if (!Subtarget->hasMMX()) break;
6337 return std::make_pair(0U, X86::VR64RegisterClass);
6339 case 'Y': // SSE_REGS if SSE2 allowed
6340 if (!Subtarget->hasSSE2()) break;
6342 case 'x': // SSE_REGS if SSE1 allowed
6343 if (!Subtarget->hasSSE1()) break;
6347 // Scalar SSE types.
6350 return std::make_pair(0U, X86::FR32RegisterClass);
6353 return std::make_pair(0U, X86::FR64RegisterClass);
6361 return std::make_pair(0U, X86::VR128RegisterClass);
6367 // Use the default implementation in TargetLowering to convert the register
6368 // constraint into a member of a register class.
6369 std::pair<unsigned, const TargetRegisterClass*> Res;
6370 Res = TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
6372 // Not found as a standard register?
6373 if (Res.second == 0) {
6374 // GCC calls "st(0)" just plain "st".
6375 if (StringsEqualNoCase("{st}", Constraint)) {
6376 Res.first = X86::ST0;
6377 Res.second = X86::RFP80RegisterClass;
6383 // Otherwise, check to see if this is a register class of the wrong value
6384 // type. For example, we want to map "{ax},i32" -> {eax}, we don't want it to
6385 // turn into {ax},{dx}.
6386 if (Res.second->hasType(VT))
6387 return Res; // Correct type already, nothing to do.
6389 // All of the single-register GCC register classes map their values onto
6390 // 16-bit register pieces "ax","dx","cx","bx","si","di","bp","sp". If we
6391 // really want an 8-bit or 32-bit register, map to the appropriate register
6392 // class and return the appropriate register.
6393 if (Res.second != X86::GR16RegisterClass)
6396 if (VT == MVT::i8) {
6397 unsigned DestReg = 0;
6398 switch (Res.first) {
6400 case X86::AX: DestReg = X86::AL; break;
6401 case X86::DX: DestReg = X86::DL; break;
6402 case X86::CX: DestReg = X86::CL; break;
6403 case X86::BX: DestReg = X86::BL; break;
6406 Res.first = DestReg;
6407 Res.second = Res.second = X86::GR8RegisterClass;
6409 } else if (VT == MVT::i32) {
6410 unsigned DestReg = 0;
6411 switch (Res.first) {
6413 case X86::AX: DestReg = X86::EAX; break;
6414 case X86::DX: DestReg = X86::EDX; break;
6415 case X86::CX: DestReg = X86::ECX; break;
6416 case X86::BX: DestReg = X86::EBX; break;
6417 case X86::SI: DestReg = X86::ESI; break;
6418 case X86::DI: DestReg = X86::EDI; break;
6419 case X86::BP: DestReg = X86::EBP; break;
6420 case X86::SP: DestReg = X86::ESP; break;
6423 Res.first = DestReg;
6424 Res.second = Res.second = X86::GR32RegisterClass;
6426 } else if (VT == MVT::i64) {
6427 unsigned DestReg = 0;
6428 switch (Res.first) {
6430 case X86::AX: DestReg = X86::RAX; break;
6431 case X86::DX: DestReg = X86::RDX; break;
6432 case X86::CX: DestReg = X86::RCX; break;
6433 case X86::BX: DestReg = X86::RBX; break;
6434 case X86::SI: DestReg = X86::RSI; break;
6435 case X86::DI: DestReg = X86::RDI; break;
6436 case X86::BP: DestReg = X86::RBP; break;
6437 case X86::SP: DestReg = X86::RSP; break;
6440 Res.first = DestReg;
6441 Res.second = Res.second = X86::GR64RegisterClass;