1 //===-- X86ISelLowering.h - X86 DAG Lowering Interface ----------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the interfaces that X86 uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #ifndef X86ISELLOWERING_H
16 #define X86ISELLOWERING_H
18 #include "X86Subtarget.h"
19 #include "X86RegisterInfo.h"
20 #include "X86MachineFunctionInfo.h"
21 #include "llvm/Target/TargetLowering.h"
22 #include "llvm/CodeGen/FastISel.h"
23 #include "llvm/CodeGen/SelectionDAG.h"
24 #include "llvm/CodeGen/CallingConvLower.h"
28 // X86 Specific DAG Nodes
30 // Start the numbering where the builtin ops leave off.
31 FIRST_NUMBER = ISD::BUILTIN_OP_END,
33 /// BSF - Bit scan forward.
34 /// BSR - Bit scan reverse.
38 /// SHLD, SHRD - Double shift instructions. These correspond to
39 /// X86::SHLDxx and X86::SHRDxx instructions.
43 /// FAND - Bitwise logical AND of floating point values. This corresponds
44 /// to X86::ANDPS or X86::ANDPD.
47 /// FOR - Bitwise logical OR of floating point values. This corresponds
48 /// to X86::ORPS or X86::ORPD.
51 /// FXOR - Bitwise logical XOR of floating point values. This corresponds
52 /// to X86::XORPS or X86::XORPD.
55 /// FSRL - Bitwise logical right shift of floating point values. These
56 /// corresponds to X86::PSRLDQ.
59 /// FILD, FILD_FLAG - This instruction implements SINT_TO_FP with the
60 /// integer source in memory and FP reg result. This corresponds to the
61 /// X86::FILD*m instructions. It has three inputs (token chain, address,
62 /// and source type) and two outputs (FP value and token chain). FILD_FLAG
63 /// also produces a flag).
67 /// FP_TO_INT*_IN_MEM - This instruction implements FP_TO_SINT with the
68 /// integer destination in memory and a FP reg source. This corresponds
69 /// to the X86::FIST*m instructions and the rounding mode change stuff. It
70 /// has two inputs (token chain and address) and two outputs (int value
76 /// FLD - This instruction implements an extending load to FP stack slots.
77 /// This corresponds to the X86::FLD32m / X86::FLD64m. It takes a chain
78 /// operand, ptr to load from, and a ValueType node indicating the type
82 /// FST - This instruction implements a truncating store to FP stack
83 /// slots. This corresponds to the X86::FST32m / X86::FST64m. It takes a
84 /// chain operand, value to store, address, and a ValueType to store it
88 /// CALL/TAILCALL - These operations represent an abstract X86 call
89 /// instruction, which includes a bunch of information. In particular the
90 /// operands of these node are:
92 /// #0 - The incoming token chain
94 /// #2 - The number of arg bytes the caller pushes on the stack.
95 /// #3 - The number of arg bytes the callee pops off the stack.
96 /// #4 - The value to pass in AL/AX/EAX (optional)
97 /// #5 - The value to pass in DL/DX/EDX (optional)
99 /// The result values of these nodes are:
101 /// #0 - The outgoing token chain
102 /// #1 - The first register result value (optional)
103 /// #2 - The second register result value (optional)
105 /// The CALL vs TAILCALL distinction boils down to whether the callee is
106 /// known not to modify the caller's stack frame, as is standard with
111 /// RDTSC_DAG - This operation implements the lowering for
115 /// X86 compare and logical compare instructions.
118 /// X86 bit-test instructions.
121 /// X86 SetCC. Operand 1 is condition code, and operand 2 is the flag
122 /// operand produced by a CMP instruction.
125 /// X86 conditional moves. Operand 1 and operand 2 are the two values
126 /// to select from (operand 1 is a R/W operand). Operand 3 is the
127 /// condition code, and operand 4 is the flag operand produced by a CMP
128 /// or TEST instruction. It also writes a flag result.
131 /// X86 conditional branches. Operand 1 is the chain operand, operand 2
132 /// is the block to branch if condition is true, operand 3 is the
133 /// condition code, and operand 4 is the flag operand produced by a CMP
134 /// or TEST instruction.
137 /// Return with a flag operand. Operand 1 is the chain operand, operand
138 /// 2 is the number of bytes of stack to pop.
141 /// REP_STOS - Repeat fill, corresponds to X86::REP_STOSx.
144 /// REP_MOVS - Repeat move, corresponds to X86::REP_MOVSx.
147 /// GlobalBaseReg - On Darwin, this node represents the result of the popl
148 /// at function entry, used for PIC code.
151 /// Wrapper - A wrapper node for TargetConstantPool,
152 /// TargetExternalSymbol, and TargetGlobalAddress.
155 /// WrapperRIP - Special wrapper used under X86-64 PIC mode for RIP
156 /// relative displacements.
159 /// PEXTRB - Extract an 8-bit value from a vector and zero extend it to
160 /// i32, corresponds to X86::PEXTRB.
163 /// PEXTRW - Extract a 16-bit value from a vector and zero extend it to
164 /// i32, corresponds to X86::PEXTRW.
167 /// INSERTPS - Insert any element of a 4 x float vector into any element
168 /// of a destination 4 x floatvector.
171 /// PINSRB - Insert the lower 8-bits of a 32-bit value to a vector,
172 /// corresponds to X86::PINSRB.
175 /// PINSRW - Insert the lower 16-bits of a 32-bit value to a vector,
176 /// corresponds to X86::PINSRW.
179 /// PSHUFB - Shuffle 16 8-bit values within a vector.
182 /// FMAX, FMIN - Floating point max and min.
186 /// FRSQRT, FRCP - Floating point reciprocal-sqrt and reciprocal
187 /// approximation. Note that these typically require refinement
188 /// in order to obtain suitable precision.
191 // TLSADDR, THREAD_POINTER - Thread Local Storage.
192 TLSADDR, THREAD_POINTER,
194 // EH_RETURN - Exception Handling helpers.
197 /// TC_RETURN - Tail call return.
199 /// operand #1 callee (register or absolute)
200 /// operand #2 stack adjustment
201 /// operand #3 optional in flag
204 // LCMPXCHG_DAG, LCMPXCHG8_DAG - Compare and swap.
208 // ATOMADD64_DAG, ATOMSUB64_DAG, ATOMOR64_DAG, ATOMAND64_DAG,
209 // ATOMXOR64_DAG, ATOMNAND64_DAG, ATOMSWAP64_DAG -
210 // Atomic 64-bit binary operations.
219 // FNSTCW16m - Store FP control world into i16 memory.
222 // VZEXT_MOVL - Vector move low and zero extend.
225 // VZEXT_LOAD - Load, scalar_to_vector, and zero extend.
228 // VSHL, VSRL - Vector logical left / right shift.
231 // CMPPD, CMPPS - Vector double/float comparison.
234 // PCMP* - Vector integer comparisons.
235 PCMPEQB, PCMPEQW, PCMPEQD, PCMPEQQ,
236 PCMPGTB, PCMPGTW, PCMPGTD, PCMPGTQ,
238 // ADD, SUB, SMUL, UMUL, etc. - Arithmetic operations with FLAGS results.
239 ADD, SUB, SMUL, UMUL,
244 /// Define some predicates that are used for node matching.
246 /// isPSHUFDMask - Return true if the specified VECTOR_SHUFFLE operand
247 /// specifies a shuffle of elements that is suitable for input to PSHUFD.
248 bool isPSHUFDMask(SDNode *N);
250 /// isPSHUFHWMask - Return true if the specified VECTOR_SHUFFLE operand
251 /// specifies a shuffle of elements that is suitable for input to PSHUFD.
252 bool isPSHUFHWMask(SDNode *N);
254 /// isPSHUFLWMask - Return true if the specified VECTOR_SHUFFLE operand
255 /// specifies a shuffle of elements that is suitable for input to PSHUFD.
256 bool isPSHUFLWMask(SDNode *N);
258 /// isSHUFPMask - Return true if the specified VECTOR_SHUFFLE operand
259 /// specifies a shuffle of elements that is suitable for input to SHUFP*.
260 bool isSHUFPMask(SDNode *N);
262 /// isMOVHLPSMask - Return true if the specified VECTOR_SHUFFLE operand
263 /// specifies a shuffle of elements that is suitable for input to MOVHLPS.
264 bool isMOVHLPSMask(SDNode *N);
266 /// isMOVHLPS_v_undef_Mask - Special case of isMOVHLPSMask for canonical form
267 /// of vector_shuffle v, v, <2, 3, 2, 3>, i.e. vector_shuffle v, undef,
269 bool isMOVHLPS_v_undef_Mask(SDNode *N);
271 /// isMOVLPMask - Return true if the specified VECTOR_SHUFFLE operand
272 /// specifies a shuffle of elements that is suitable for input to MOVLP{S|D}.
273 bool isMOVLPMask(SDNode *N);
275 /// isMOVHPMask - Return true if the specified VECTOR_SHUFFLE operand
276 /// specifies a shuffle of elements that is suitable for input to MOVHP{S|D}
277 /// as well as MOVLHPS.
278 bool isMOVHPMask(SDNode *N);
280 /// isUNPCKLMask - Return true if the specified VECTOR_SHUFFLE operand
281 /// specifies a shuffle of elements that is suitable for input to UNPCKL.
282 bool isUNPCKLMask(SDNode *N, bool V2IsSplat = false);
284 /// isUNPCKHMask - Return true if the specified VECTOR_SHUFFLE operand
285 /// specifies a shuffle of elements that is suitable for input to UNPCKH.
286 bool isUNPCKHMask(SDNode *N, bool V2IsSplat = false);
288 /// isUNPCKL_v_undef_Mask - Special case of isUNPCKLMask for canonical form
289 /// of vector_shuffle v, v, <0, 4, 1, 5>, i.e. vector_shuffle v, undef,
291 bool isUNPCKL_v_undef_Mask(SDNode *N);
293 /// isUNPCKH_v_undef_Mask - Special case of isUNPCKHMask for canonical form
294 /// of vector_shuffle v, v, <2, 6, 3, 7>, i.e. vector_shuffle v, undef,
296 bool isUNPCKH_v_undef_Mask(SDNode *N);
298 /// isMOVLMask - Return true if the specified VECTOR_SHUFFLE operand
299 /// specifies a shuffle of elements that is suitable for input to MOVSS,
300 /// MOVSD, and MOVD, i.e. setting the lowest element.
301 bool isMOVLMask(SDNode *N);
303 /// isMOVSHDUPMask - Return true if the specified VECTOR_SHUFFLE operand
304 /// specifies a shuffle of elements that is suitable for input to MOVSHDUP.
305 bool isMOVSHDUPMask(SDNode *N);
307 /// isMOVSLDUPMask - Return true if the specified VECTOR_SHUFFLE operand
308 /// specifies a shuffle of elements that is suitable for input to MOVSLDUP.
309 bool isMOVSLDUPMask(SDNode *N);
311 /// isSplatMask - Return true if the specified VECTOR_SHUFFLE operand
312 /// specifies a splat of a single element.
313 bool isSplatMask(SDNode *N);
315 /// isSplatLoMask - Return true if the specified VECTOR_SHUFFLE operand
316 /// specifies a splat of zero element.
317 bool isSplatLoMask(SDNode *N);
319 /// isMOVDDUPMask - Return true if the specified VECTOR_SHUFFLE operand
320 /// specifies a shuffle of elements that is suitable for input to MOVDDUP.
321 bool isMOVDDUPMask(SDNode *N);
323 /// getShuffleSHUFImmediate - Return the appropriate immediate to shuffle
324 /// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUF* and SHUFP*
326 unsigned getShuffleSHUFImmediate(SDNode *N);
328 /// getShufflePSHUFHWImmediate - Return the appropriate immediate to shuffle
329 /// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUFHW
331 unsigned getShufflePSHUFHWImmediate(SDNode *N);
333 /// getShufflePSHUFKWImmediate - Return the appropriate immediate to shuffle
334 /// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUFLW
336 unsigned getShufflePSHUFLWImmediate(SDNode *N);
339 //===--------------------------------------------------------------------===//
340 // X86TargetLowering - X86 Implementation of the TargetLowering interface
341 class X86TargetLowering : public TargetLowering {
342 int VarArgsFrameIndex; // FrameIndex for start of varargs area.
343 int RegSaveFrameIndex; // X86-64 vararg func register save area.
344 unsigned VarArgsGPOffset; // X86-64 vararg func int reg offset.
345 unsigned VarArgsFPOffset; // X86-64 vararg func fp reg offset.
346 int BytesToPopOnReturn; // Number of arg bytes ret should pop.
347 int BytesCallerReserves; // Number of arg bytes caller makes.
350 explicit X86TargetLowering(X86TargetMachine &TM);
352 /// getPICJumpTableRelocaBase - Returns relocation base for the given PIC
354 SDValue getPICJumpTableRelocBase(SDValue Table,
355 SelectionDAG &DAG) const;
357 // Return the number of bytes that a function should pop when it returns (in
358 // addition to the space used by the return address).
360 unsigned getBytesToPopOnReturn() const { return BytesToPopOnReturn; }
362 // Return the number of bytes that the caller reserves for arguments passed
364 unsigned getBytesCallerReserves() const { return BytesCallerReserves; }
366 /// getStackPtrReg - Return the stack pointer register we are using: either
368 unsigned getStackPtrReg() const { return X86StackPtr; }
370 /// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
371 /// function arguments in the caller parameter area. For X86, aggregates
372 /// that contains are placed at 16-byte boundaries while the rest are at
373 /// 4-byte boundaries.
374 virtual unsigned getByValTypeAlignment(const Type *Ty) const;
376 /// getOptimalMemOpType - Returns the target specific optimal type for load
377 /// and store operations as a result of memset, memcpy, and memmove
378 /// lowering. It returns MVT::iAny if SelectionDAG should be responsible for
381 MVT getOptimalMemOpType(uint64_t Size, unsigned Align,
382 bool isSrcConst, bool isSrcStr) const;
384 /// LowerOperation - Provide custom lowering hooks for some operations.
386 virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
388 /// ReplaceNodeResults - Replace the results of node with an illegal result
389 /// type with new values built out of custom code.
391 virtual void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue>&Results,
395 virtual SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const;
397 virtual MachineBasicBlock *EmitInstrWithCustomInserter(MachineInstr *MI,
398 MachineBasicBlock *MBB) const;
401 /// getTargetNodeName - This method returns the name of a target specific
403 virtual const char *getTargetNodeName(unsigned Opcode) const;
405 /// getSetCCResultType - Return the ISD::SETCC ValueType
406 virtual MVT getSetCCResultType(MVT VT) const;
408 /// computeMaskedBitsForTargetNode - Determine which of the bits specified
409 /// in Mask are known to be either zero or one and return them in the
410 /// KnownZero/KnownOne bitsets.
411 virtual void computeMaskedBitsForTargetNode(const SDValue Op,
415 const SelectionDAG &DAG,
416 unsigned Depth = 0) const;
419 isGAPlusOffset(SDNode *N, GlobalValue* &GA, int64_t &Offset) const;
421 SDValue getReturnAddressFrameIndex(SelectionDAG &DAG);
423 ConstraintType getConstraintType(const std::string &Constraint) const;
425 std::vector<unsigned>
426 getRegClassForInlineAsmConstraint(const std::string &Constraint,
429 virtual const char *LowerXConstraint(MVT ConstraintVT) const;
431 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
432 /// vector. If it is invalid, don't add anything to Ops. If hasMemory is
433 /// true it means one of the asm constraint of the inline asm instruction
434 /// being processed is 'm'.
435 virtual void LowerAsmOperandForConstraint(SDValue Op,
436 char ConstraintLetter,
438 std::vector<SDValue> &Ops,
439 SelectionDAG &DAG) const;
441 /// getRegForInlineAsmConstraint - Given a physical register constraint
442 /// (e.g. {edx}), return the register number and the register class for the
443 /// register. This should only be used for C_Register constraints. On
444 /// error, this returns a register number of 0.
445 std::pair<unsigned, const TargetRegisterClass*>
446 getRegForInlineAsmConstraint(const std::string &Constraint,
449 /// isLegalAddressingMode - Return true if the addressing mode represented
450 /// by AM is legal for this target, for a load/store of the specified type.
451 virtual bool isLegalAddressingMode(const AddrMode &AM, const Type *Ty)const;
453 /// isTruncateFree - Return true if it's free to truncate a value of
454 /// type Ty1 to type Ty2. e.g. On x86 it's free to truncate a i32 value in
455 /// register EAX to i16 by referencing its sub-register AX.
456 virtual bool isTruncateFree(const Type *Ty1, const Type *Ty2) const;
457 virtual bool isTruncateFree(MVT VT1, MVT VT2) const;
459 /// isShuffleMaskLegal - Targets can use this to indicate that they only
460 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
461 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask
462 /// values are assumed to be legal.
463 virtual bool isShuffleMaskLegal(SDValue Mask, MVT VT) const;
465 /// isVectorClearMaskLegal - Similar to isShuffleMaskLegal. This is
466 /// used by Targets can use this to indicate if there is a suitable
467 /// VECTOR_SHUFFLE that can be used to replace a VAND with a constant
469 virtual bool isVectorClearMaskLegal(const std::vector<SDValue> &BVOps,
470 MVT EVT, SelectionDAG &DAG) const;
472 /// ShouldShrinkFPConstant - If true, then instruction selection should
473 /// seek to shrink the FP constant of the specified type to a smaller type
474 /// in order to save space and / or reduce runtime.
475 virtual bool ShouldShrinkFPConstant(MVT VT) const {
476 // Don't shrink FP constpool if SSE2 is available since cvtss2sd is more
477 // expensive than a straight movsd. On the other hand, it's important to
478 // shrink long double fp constant since fldt is very slow.
479 return !X86ScalarSSEf64 || VT == MVT::f80;
482 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
483 /// for tail call optimization. Target which want to do tail call
484 /// optimization should implement this function.
485 virtual bool IsEligibleForTailCallOptimization(CallSDNode *TheCall,
487 SelectionDAG &DAG) const;
489 virtual const X86Subtarget* getSubtarget() {
493 /// isScalarFPTypeInSSEReg - Return true if the specified scalar FP type is
494 /// computed in an SSE register, not on the X87 floating point stack.
495 bool isScalarFPTypeInSSEReg(MVT VT) const {
496 return (VT == MVT::f64 && X86ScalarSSEf64) || // f64 is when SSE2
497 (VT == MVT::f32 && X86ScalarSSEf32); // f32 is when SSE1
500 /// getWidenVectorType: given a vector type, returns the type to widen
501 /// to (e.g., v7i8 to v8i8). If the vector type is legal, it returns itself.
502 /// If there is no vector type that we want to widen to, returns MVT::Other
503 /// When and were to widen is target dependent based on the cost of
504 /// scalarizing vs using the wider vector type.
505 virtual MVT getWidenVectorType(MVT VT) const;
507 /// createFastISel - This method returns a target specific FastISel object,
508 /// or null if the target does not support "fast" ISel.
510 createFastISel(MachineFunction &mf,
511 MachineModuleInfo *mmi, DwarfWriter *dw,
512 DenseMap<const Value *, unsigned> &,
513 DenseMap<const BasicBlock *, MachineBasicBlock *> &,
514 DenseMap<const AllocaInst *, int> &
516 , SmallSet<Instruction*, 8> &
521 /// Subtarget - Keep a pointer to the X86Subtarget around so that we can
522 /// make the right decision when generating code for different targets.
523 const X86Subtarget *Subtarget;
524 const X86RegisterInfo *RegInfo;
525 const TargetData *TD;
527 /// X86StackPtr - X86 physical register used as stack ptr.
528 unsigned X86StackPtr;
530 /// X86ScalarSSEf32, X86ScalarSSEf64 - Select between SSE or x87
531 /// floating point ops.
532 /// When SSE is available, use it for f32 operations.
533 /// When SSE2 is available, use it for f64 operations.
534 bool X86ScalarSSEf32;
535 bool X86ScalarSSEf64;
537 SDNode *LowerCallResult(SDValue Chain, SDValue InFlag, CallSDNode *TheCall,
538 unsigned CallingConv, SelectionDAG &DAG);
540 SDValue LowerMemArgument(SDValue Op, SelectionDAG &DAG,
541 const CCValAssign &VA, MachineFrameInfo *MFI,
542 unsigned CC, SDValue Root, unsigned i);
544 SDValue LowerMemOpCallTo(CallSDNode *TheCall, SelectionDAG &DAG,
545 const SDValue &StackPtr,
546 const CCValAssign &VA, SDValue Chain,
547 SDValue Arg, ISD::ArgFlagsTy Flags);
549 // Call lowering helpers.
550 bool IsCalleePop(bool isVarArg, unsigned CallingConv);
551 bool CallRequiresGOTPtrInReg(bool Is64Bit, bool IsTailCall);
552 bool CallRequiresFnAddressInReg(bool Is64Bit, bool IsTailCall);
553 SDValue EmitTailCallLoadRetAddr(SelectionDAG &DAG, SDValue &OutRetAddr,
554 SDValue Chain, bool IsTailCall, bool Is64Bit,
555 int FPDiff, DebugLoc dl);
557 CCAssignFn *CCAssignFnForNode(unsigned CallingConv) const;
558 NameDecorationStyle NameDecorationForFORMAL_ARGUMENTS(SDValue Op);
559 unsigned GetAlignedArgumentStackSize(unsigned StackSize, SelectionDAG &DAG);
561 std::pair<SDValue,SDValue> FP_TO_SINTHelper(SDValue Op,
564 SDValue LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG);
565 SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG);
566 SDValue LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG);
567 SDValue LowerEXTRACT_VECTOR_ELT_SSE4(SDValue Op, SelectionDAG &DAG);
568 SDValue LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG);
569 SDValue LowerINSERT_VECTOR_ELT_SSE4(SDValue Op, SelectionDAG &DAG);
570 SDValue LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG);
571 SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG);
572 SDValue LowerGlobalAddress(const GlobalValue *GV, DebugLoc dl,
573 int64_t Offset, SelectionDAG &DAG) const;
574 SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG);
575 SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG);
576 SDValue LowerExternalSymbol(SDValue Op, SelectionDAG &DAG);
577 SDValue LowerShift(SDValue Op, SelectionDAG &DAG);
578 SDValue LowerSINT_TO_FP(SDValue Op, SelectionDAG &DAG);
579 SDValue LowerUINT_TO_FP(SDValue Op, SelectionDAG &DAG);
580 SDValue LowerUINT_TO_FP_i64(SDValue Op, SelectionDAG &DAG);
581 SDValue LowerUINT_TO_FP_i32(SDValue Op, SelectionDAG &DAG);
582 SDValue LowerFP_TO_SINT(SDValue Op, SelectionDAG &DAG);
583 SDValue LowerFABS(SDValue Op, SelectionDAG &DAG);
584 SDValue LowerFNEG(SDValue Op, SelectionDAG &DAG);
585 SDValue LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG);
586 SDValue LowerSETCC(SDValue Op, SelectionDAG &DAG);
587 SDValue LowerVSETCC(SDValue Op, SelectionDAG &DAG);
588 SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG);
589 SDValue LowerBRCOND(SDValue Op, SelectionDAG &DAG);
590 SDValue LowerMEMSET(SDValue Op, SelectionDAG &DAG);
591 SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG);
592 SDValue LowerCALL(SDValue Op, SelectionDAG &DAG);
593 SDValue LowerRET(SDValue Op, SelectionDAG &DAG);
594 SDValue LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG);
595 SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG);
596 SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG);
597 SDValue LowerVAARG(SDValue Op, SelectionDAG &DAG);
598 SDValue LowerVACOPY(SDValue Op, SelectionDAG &DAG);
599 SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG);
600 SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG);
601 SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG);
602 SDValue LowerFRAME_TO_ARGS_OFFSET(SDValue Op, SelectionDAG &DAG);
603 SDValue LowerEH_RETURN(SDValue Op, SelectionDAG &DAG);
604 SDValue LowerTRAMPOLINE(SDValue Op, SelectionDAG &DAG);
605 SDValue LowerFLT_ROUNDS_(SDValue Op, SelectionDAG &DAG);
606 SDValue LowerCTLZ(SDValue Op, SelectionDAG &DAG);
607 SDValue LowerCTTZ(SDValue Op, SelectionDAG &DAG);
608 SDValue LowerMUL_V2I64(SDValue Op, SelectionDAG &DAG);
609 SDValue LowerXALUO(SDValue Op, SelectionDAG &DAG);
611 SDValue LowerCMP_SWAP(SDValue Op, SelectionDAG &DAG);
612 SDValue LowerLOAD_SUB(SDValue Op, SelectionDAG &DAG);
613 SDValue LowerREADCYCLECOUNTER(SDValue Op, SelectionDAG &DAG);
615 void ReplaceATOMIC_BINARY_64(SDNode *N, SmallVectorImpl<SDValue> &Results,
616 SelectionDAG &DAG, unsigned NewOp);
618 SDValue EmitTargetCodeForMemset(SelectionDAG &DAG, DebugLoc dl,
620 SDValue Dst, SDValue Src,
621 SDValue Size, unsigned Align,
622 const Value *DstSV, uint64_t DstSVOff);
623 SDValue EmitTargetCodeForMemcpy(SelectionDAG &DAG, DebugLoc dl,
625 SDValue Dst, SDValue Src,
626 SDValue Size, unsigned Align,
628 const Value *DstSV, uint64_t DstSVOff,
629 const Value *SrcSV, uint64_t SrcSVOff);
631 /// Utility function to emit atomic bitwise operations (and, or, xor).
632 // It takes the bitwise instruction to expand, the associated machine basic
633 // block, and the associated X86 opcodes for reg/reg and reg/imm.
634 MachineBasicBlock *EmitAtomicBitwiseWithCustomInserter(
635 MachineInstr *BInstr,
636 MachineBasicBlock *BB,
644 TargetRegisterClass *RC,
645 bool invSrc = false) const;
647 MachineBasicBlock *EmitAtomicBit6432WithCustomInserter(
648 MachineInstr *BInstr,
649 MachineBasicBlock *BB,
654 bool invSrc = false) const;
656 /// Utility function to emit atomic min and max. It takes the min/max
657 // instruction to expand, the associated basic block, and the associated
658 // cmov opcode for moving the min or max value.
659 MachineBasicBlock *EmitAtomicMinMaxWithCustomInserter(MachineInstr *BInstr,
660 MachineBasicBlock *BB,
661 unsigned cmovOpc) const;
663 /// Emit nodes that will be selected as "test Op0,Op0", or something
664 /// equivalent, for use with the given x86 condition code.
665 SDValue EmitTest(SDValue Op0, unsigned X86CC, SelectionDAG &DAG);
667 /// Emit nodes that will be selected as "cmp Op0,Op1", or something
668 /// equivalent, for use with the given x86 condition code.
669 SDValue EmitCmp(SDValue Op0, SDValue Op1, unsigned X86CC,
674 FastISel *createFastISel(MachineFunction &mf,
675 MachineModuleInfo *mmi, DwarfWriter *dw,
676 DenseMap<const Value *, unsigned> &,
677 DenseMap<const BasicBlock *, MachineBasicBlock *> &,
678 DenseMap<const AllocaInst *, int> &
680 , SmallSet<Instruction*, 8> &
686 #endif // X86ISELLOWERING_H