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 - 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)
107 /// RDTSC_DAG - This operation implements the lowering for
111 /// X86 compare and logical compare instructions.
114 /// X86 bit-test instructions.
117 /// X86 SetCC. Operand 0 is condition code, and operand 1 is the flag
118 /// operand produced by a CMP instruction.
121 // Same as SETCC except it's materialized with a sbb and the value is all
122 // one's or all zero's.
125 /// X86 conditional moves. Operand 0 and operand 1 are the two values
126 /// to select from. Operand 2 is the condition code, and operand 3 is the
127 /// flag operand produced by a CMP or TEST instruction. It also writes a
131 /// X86 conditional branches. Operand 0 is the chain operand, operand 1
132 /// is the block to branch if condition is true, operand 2 is the
133 /// condition code, and operand 3 is the flag operand produced by a CMP
134 /// or TEST instruction.
137 /// Return with a flag operand. Operand 0 is the chain operand, operand
138 /// 1 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 /// MOVQ2DQ - Copies a 64-bit value from a vector to another vector.
160 /// Can be used to move a vector value from a MMX register to a XMM
164 /// PEXTRB - Extract an 8-bit value from a vector and zero extend it to
165 /// i32, corresponds to X86::PEXTRB.
168 /// PEXTRW - Extract a 16-bit value from a vector and zero extend it to
169 /// i32, corresponds to X86::PEXTRW.
172 /// INSERTPS - Insert any element of a 4 x float vector into any element
173 /// of a destination 4 x floatvector.
176 /// PINSRB - Insert the lower 8-bits of a 32-bit value to a vector,
177 /// corresponds to X86::PINSRB.
180 /// PINSRW - Insert the lower 16-bits of a 32-bit value to a vector,
181 /// corresponds to X86::PINSRW.
184 /// PSHUFB - Shuffle 16 8-bit values within a vector.
187 /// FMAX, FMIN - Floating point max and min.
191 /// FRSQRT, FRCP - Floating point reciprocal-sqrt and reciprocal
192 /// approximation. Note that these typically require refinement
193 /// in order to obtain suitable precision.
196 // TLSADDR - Thread Local Storage.
199 // SegmentBaseAddress - The address segment:0
202 // EH_RETURN - Exception Handling helpers.
205 /// TC_RETURN - Tail call return.
207 /// operand #1 callee (register or absolute)
208 /// operand #2 stack adjustment
209 /// operand #3 optional in flag
212 // LCMPXCHG_DAG, LCMPXCHG8_DAG - Compare and swap.
216 // FNSTCW16m - Store FP control world into i16 memory.
219 // VZEXT_MOVL - Vector move low and zero extend.
222 // VZEXT_LOAD - Load, scalar_to_vector, and zero extend.
225 // VSHL, VSRL - Vector logical left / right shift.
228 // CMPPD, CMPPS - Vector double/float comparison.
229 // CMPPD, CMPPS - Vector double/float comparison.
232 // PCMP* - Vector integer comparisons.
233 PCMPEQB, PCMPEQW, PCMPEQD, PCMPEQQ,
234 PCMPGTB, PCMPGTW, PCMPGTD, PCMPGTQ,
236 // ADD, SUB, SMUL, UMUL, etc. - Arithmetic operations with FLAGS results.
237 ADD, SUB, SMUL, UMUL,
238 INC, DEC, OR, XOR, AND,
240 // MUL_IMM - X86 specific multiply by immediate.
243 // PTEST - Vector bitwise comparisons
246 // VASTART_SAVE_XMM_REGS - Save xmm argument registers to the stack,
247 // according to %al. An operator is needed so that this can be expanded
248 // with control flow.
249 VASTART_SAVE_XMM_REGS,
251 // ATOMADD64_DAG, ATOMSUB64_DAG, ATOMOR64_DAG, ATOMAND64_DAG,
252 // ATOMXOR64_DAG, ATOMNAND64_DAG, ATOMSWAP64_DAG -
253 // Atomic 64-bit binary operations.
254 ATOMADD64_DAG = ISD::FIRST_TARGET_MEMORY_OPCODE,
264 /// Define some predicates that are used for node matching.
266 /// isPSHUFDMask - Return true if the specified VECTOR_SHUFFLE operand
267 /// specifies a shuffle of elements that is suitable for input to PSHUFD.
268 bool isPSHUFDMask(ShuffleVectorSDNode *N);
270 /// isPSHUFHWMask - Return true if the specified VECTOR_SHUFFLE operand
271 /// specifies a shuffle of elements that is suitable for input to PSHUFD.
272 bool isPSHUFHWMask(ShuffleVectorSDNode *N);
274 /// isPSHUFLWMask - Return true if the specified VECTOR_SHUFFLE operand
275 /// specifies a shuffle of elements that is suitable for input to PSHUFD.
276 bool isPSHUFLWMask(ShuffleVectorSDNode *N);
278 /// isSHUFPMask - Return true if the specified VECTOR_SHUFFLE operand
279 /// specifies a shuffle of elements that is suitable for input to SHUFP*.
280 bool isSHUFPMask(ShuffleVectorSDNode *N);
282 /// isMOVHLPSMask - Return true if the specified VECTOR_SHUFFLE operand
283 /// specifies a shuffle of elements that is suitable for input to MOVHLPS.
284 bool isMOVHLPSMask(ShuffleVectorSDNode *N);
286 /// isMOVHLPS_v_undef_Mask - Special case of isMOVHLPSMask for canonical form
287 /// of vector_shuffle v, v, <2, 3, 2, 3>, i.e. vector_shuffle v, undef,
289 bool isMOVHLPS_v_undef_Mask(ShuffleVectorSDNode *N);
291 /// isMOVLPMask - Return true if the specified VECTOR_SHUFFLE operand
292 /// specifies a shuffle of elements that is suitable for MOVLP{S|D}.
293 bool isMOVLPMask(ShuffleVectorSDNode *N);
295 /// isMOVHPMask - Return true if the specified VECTOR_SHUFFLE operand
296 /// specifies a shuffle of elements that is suitable for MOVHP{S|D}.
297 /// as well as MOVLHPS.
298 bool isMOVLHPSMask(ShuffleVectorSDNode *N);
300 /// isUNPCKLMask - Return true if the specified VECTOR_SHUFFLE operand
301 /// specifies a shuffle of elements that is suitable for input to UNPCKL.
302 bool isUNPCKLMask(ShuffleVectorSDNode *N, bool V2IsSplat = false);
304 /// isUNPCKHMask - Return true if the specified VECTOR_SHUFFLE operand
305 /// specifies a shuffle of elements that is suitable for input to UNPCKH.
306 bool isUNPCKHMask(ShuffleVectorSDNode *N, bool V2IsSplat = false);
308 /// isUNPCKL_v_undef_Mask - Special case of isUNPCKLMask for canonical form
309 /// of vector_shuffle v, v, <0, 4, 1, 5>, i.e. vector_shuffle v, undef,
311 bool isUNPCKL_v_undef_Mask(ShuffleVectorSDNode *N);
313 /// isUNPCKH_v_undef_Mask - Special case of isUNPCKHMask for canonical form
314 /// of vector_shuffle v, v, <2, 6, 3, 7>, i.e. vector_shuffle v, undef,
316 bool isUNPCKH_v_undef_Mask(ShuffleVectorSDNode *N);
318 /// isMOVLMask - Return true if the specified VECTOR_SHUFFLE operand
319 /// specifies a shuffle of elements that is suitable for input to MOVSS,
320 /// MOVSD, and MOVD, i.e. setting the lowest element.
321 bool isMOVLMask(ShuffleVectorSDNode *N);
323 /// isMOVSHDUPMask - Return true if the specified VECTOR_SHUFFLE operand
324 /// specifies a shuffle of elements that is suitable for input to MOVSHDUP.
325 bool isMOVSHDUPMask(ShuffleVectorSDNode *N);
327 /// isMOVSLDUPMask - Return true if the specified VECTOR_SHUFFLE operand
328 /// specifies a shuffle of elements that is suitable for input to MOVSLDUP.
329 bool isMOVSLDUPMask(ShuffleVectorSDNode *N);
331 /// isMOVDDUPMask - Return true if the specified VECTOR_SHUFFLE operand
332 /// specifies a shuffle of elements that is suitable for input to MOVDDUP.
333 bool isMOVDDUPMask(ShuffleVectorSDNode *N);
335 /// isPALIGNRMask - Return true if the specified VECTOR_SHUFFLE operand
336 /// specifies a shuffle of elements that is suitable for input to PALIGNR.
337 bool isPALIGNRMask(ShuffleVectorSDNode *N);
339 /// getShuffleSHUFImmediate - Return the appropriate immediate to shuffle
340 /// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUF* and SHUFP*
342 unsigned getShuffleSHUFImmediate(SDNode *N);
344 /// getShufflePSHUFHWImmediate - Return the appropriate immediate to shuffle
345 /// the specified VECTOR_SHUFFLE mask with PSHUFHW instruction.
346 unsigned getShufflePSHUFHWImmediate(SDNode *N);
348 /// getShufflePSHUFLWImmediate - Return the appropriate immediate to shuffle
349 /// the specified VECTOR_SHUFFLE mask with PSHUFLW instruction.
350 unsigned getShufflePSHUFLWImmediate(SDNode *N);
352 /// getShufflePALIGNRImmediate - Return the appropriate immediate to shuffle
353 /// the specified VECTOR_SHUFFLE mask with the PALIGNR instruction.
354 unsigned getShufflePALIGNRImmediate(SDNode *N);
356 /// isZeroNode - Returns true if Elt is a constant zero or a floating point
358 bool isZeroNode(SDValue Elt);
360 /// isOffsetSuitableForCodeModel - Returns true of the given offset can be
361 /// fit into displacement field of the instruction.
362 bool isOffsetSuitableForCodeModel(int64_t Offset, CodeModel::Model M,
363 bool hasSymbolicDisplacement = true);
366 //===--------------------------------------------------------------------===//
367 // X86TargetLowering - X86 Implementation of the TargetLowering interface
368 class X86TargetLowering : public TargetLowering {
369 int VarArgsFrameIndex; // FrameIndex for start of varargs area.
370 int RegSaveFrameIndex; // X86-64 vararg func register save area.
371 unsigned VarArgsGPOffset; // X86-64 vararg func int reg offset.
372 unsigned VarArgsFPOffset; // X86-64 vararg func fp reg offset.
373 int BytesToPopOnReturn; // Number of arg bytes ret should pop.
374 int BytesCallerReserves; // Number of arg bytes caller makes.
377 explicit X86TargetLowering(X86TargetMachine &TM);
379 /// getPICJumpTableRelocaBase - Returns relocation base for the given PIC
381 SDValue getPICJumpTableRelocBase(SDValue Table,
382 SelectionDAG &DAG) const;
384 // Return the number of bytes that a function should pop when it returns (in
385 // addition to the space used by the return address).
387 unsigned getBytesToPopOnReturn() const { return BytesToPopOnReturn; }
389 // Return the number of bytes that the caller reserves for arguments passed
391 unsigned getBytesCallerReserves() const { return BytesCallerReserves; }
393 /// getStackPtrReg - Return the stack pointer register we are using: either
395 unsigned getStackPtrReg() const { return X86StackPtr; }
397 /// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
398 /// function arguments in the caller parameter area. For X86, aggregates
399 /// that contains are placed at 16-byte boundaries while the rest are at
400 /// 4-byte boundaries.
401 virtual unsigned getByValTypeAlignment(const Type *Ty) const;
403 /// getOptimalMemOpType - Returns the target specific optimal type for load
404 /// and store operations as a result of memset, memcpy, and memmove
405 /// lowering. It returns EVT::iAny if SelectionDAG should be responsible for
407 virtual EVT getOptimalMemOpType(uint64_t Size, unsigned Align,
408 bool isSrcConst, bool isSrcStr,
409 SelectionDAG &DAG) const;
411 /// allowsUnalignedMemoryAccesses - Returns true if the target allows
412 /// unaligned memory accesses. of the specified type.
413 virtual bool allowsUnalignedMemoryAccesses(EVT VT) const {
417 /// LowerOperation - Provide custom lowering hooks for some operations.
419 virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
421 /// ReplaceNodeResults - Replace the results of node with an illegal result
422 /// type with new values built out of custom code.
424 virtual void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue>&Results,
428 virtual SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const;
430 virtual MachineBasicBlock *EmitInstrWithCustomInserter(MachineInstr *MI,
431 MachineBasicBlock *MBB,
432 DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM) const;
435 /// getTargetNodeName - This method returns the name of a target specific
437 virtual const char *getTargetNodeName(unsigned Opcode) const;
439 /// getSetCCResultType - Return the ISD::SETCC ValueType
440 virtual MVT::SimpleValueType getSetCCResultType(EVT VT) const;
442 /// computeMaskedBitsForTargetNode - Determine which of the bits specified
443 /// in Mask are known to be either zero or one and return them in the
444 /// KnownZero/KnownOne bitsets.
445 virtual void computeMaskedBitsForTargetNode(const SDValue Op,
449 const SelectionDAG &DAG,
450 unsigned Depth = 0) const;
453 isGAPlusOffset(SDNode *N, GlobalValue* &GA, int64_t &Offset) const;
455 SDValue getReturnAddressFrameIndex(SelectionDAG &DAG);
457 virtual bool ExpandInlineAsm(CallInst *CI) const;
459 ConstraintType getConstraintType(const std::string &Constraint) const;
461 std::vector<unsigned>
462 getRegClassForInlineAsmConstraint(const std::string &Constraint,
465 virtual const char *LowerXConstraint(EVT ConstraintVT) const;
467 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
468 /// vector. If it is invalid, don't add anything to Ops. If hasMemory is
469 /// true it means one of the asm constraint of the inline asm instruction
470 /// being processed is 'm'.
471 virtual void LowerAsmOperandForConstraint(SDValue Op,
472 char ConstraintLetter,
474 std::vector<SDValue> &Ops,
475 SelectionDAG &DAG) const;
477 /// getRegForInlineAsmConstraint - Given a physical register constraint
478 /// (e.g. {edx}), return the register number and the register class for the
479 /// register. This should only be used for C_Register constraints. On
480 /// error, this returns a register number of 0.
481 std::pair<unsigned, const TargetRegisterClass*>
482 getRegForInlineAsmConstraint(const std::string &Constraint,
485 /// isLegalAddressingMode - Return true if the addressing mode represented
486 /// by AM is legal for this target, for a load/store of the specified type.
487 virtual bool isLegalAddressingMode(const AddrMode &AM, const Type *Ty)const;
489 /// isTruncateFree - Return true if it's free to truncate a value of
490 /// type Ty1 to type Ty2. e.g. On x86 it's free to truncate a i32 value in
491 /// register EAX to i16 by referencing its sub-register AX.
492 virtual bool isTruncateFree(const Type *Ty1, const Type *Ty2) const;
493 virtual bool isTruncateFree(EVT VT1, EVT VT2) const;
495 /// isZExtFree - Return true if any actual instruction that defines a
496 /// value of type Ty1 implicit zero-extends the value to Ty2 in the result
497 /// register. This does not necessarily include registers defined in
498 /// unknown ways, such as incoming arguments, or copies from unknown
499 /// virtual registers. Also, if isTruncateFree(Ty2, Ty1) is true, this
500 /// does not necessarily apply to truncate instructions. e.g. on x86-64,
501 /// all instructions that define 32-bit values implicit zero-extend the
502 /// result out to 64 bits.
503 virtual bool isZExtFree(const Type *Ty1, const Type *Ty2) const;
504 virtual bool isZExtFree(EVT VT1, EVT VT2) const;
506 /// isNarrowingProfitable - Return true if it's profitable to narrow
507 /// operations of type VT1 to VT2. e.g. on x86, it's profitable to narrow
508 /// from i32 to i8 but not from i32 to i16.
509 virtual bool isNarrowingProfitable(EVT VT1, EVT VT2) const;
511 /// isFPImmLegal - Returns true if the target can instruction select the
512 /// specified FP immediate natively. If false, the legalizer will
513 /// materialize the FP immediate as a load from a constant pool.
514 virtual bool isFPImmLegal(const APFloat &Imm, EVT VT) const;
516 /// isShuffleMaskLegal - Targets can use this to indicate that they only
517 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
518 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask
519 /// values are assumed to be legal.
520 virtual bool isShuffleMaskLegal(const SmallVectorImpl<int> &Mask,
523 /// isVectorClearMaskLegal - Similar to isShuffleMaskLegal. This is
524 /// used by Targets can use this to indicate if there is a suitable
525 /// VECTOR_SHUFFLE that can be used to replace a VAND with a constant
527 virtual bool isVectorClearMaskLegal(const SmallVectorImpl<int> &Mask,
530 /// ShouldShrinkFPConstant - If true, then instruction selection should
531 /// seek to shrink the FP constant of the specified type to a smaller type
532 /// in order to save space and / or reduce runtime.
533 virtual bool ShouldShrinkFPConstant(EVT VT) const {
534 // Don't shrink FP constpool if SSE2 is available since cvtss2sd is more
535 // expensive than a straight movsd. On the other hand, it's important to
536 // shrink long double fp constant since fldt is very slow.
537 return !X86ScalarSSEf64 || VT == MVT::f80;
540 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
541 /// for tail call optimization. Targets which want to do tail call
542 /// optimization should implement this function.
544 IsEligibleForTailCallOptimization(SDValue Callee,
545 CallingConv::ID CalleeCC,
547 const SmallVectorImpl<ISD::InputArg> &Ins,
548 SelectionDAG& DAG) const;
550 virtual const X86Subtarget* getSubtarget() {
554 /// isScalarFPTypeInSSEReg - Return true if the specified scalar FP type is
555 /// computed in an SSE register, not on the X87 floating point stack.
556 bool isScalarFPTypeInSSEReg(EVT VT) const {
557 return (VT == MVT::f64 && X86ScalarSSEf64) || // f64 is when SSE2
558 (VT == MVT::f32 && X86ScalarSSEf32); // f32 is when SSE1
561 /// getWidenVectorType: given a vector type, returns the type to widen
562 /// to (e.g., v7i8 to v8i8). If the vector type is legal, it returns itself.
563 /// If there is no vector type that we want to widen to, returns EVT::Other
564 /// When and were to widen is target dependent based on the cost of
565 /// scalarizing vs using the wider vector type.
566 virtual EVT getWidenVectorType(EVT VT) const;
568 /// createFastISel - This method returns a target specific FastISel object,
569 /// or null if the target does not support "fast" ISel.
571 createFastISel(MachineFunction &mf,
572 MachineModuleInfo *mmi, DwarfWriter *dw,
573 DenseMap<const Value *, unsigned> &,
574 DenseMap<const BasicBlock *, MachineBasicBlock *> &,
575 DenseMap<const AllocaInst *, int> &
577 , SmallSet<Instruction*, 8> &
581 /// getFunctionAlignment - Return the Log2 alignment of this function.
582 virtual unsigned getFunctionAlignment(const Function *F) const;
585 /// Subtarget - Keep a pointer to the X86Subtarget around so that we can
586 /// make the right decision when generating code for different targets.
587 const X86Subtarget *Subtarget;
588 const X86RegisterInfo *RegInfo;
589 const TargetData *TD;
591 /// X86StackPtr - X86 physical register used as stack ptr.
592 unsigned X86StackPtr;
594 /// X86ScalarSSEf32, X86ScalarSSEf64 - Select between SSE or x87
595 /// floating point ops.
596 /// When SSE is available, use it for f32 operations.
597 /// When SSE2 is available, use it for f64 operations.
598 bool X86ScalarSSEf32;
599 bool X86ScalarSSEf64;
601 /// LegalFPImmediates - A list of legal fp immediates.
602 std::vector<APFloat> LegalFPImmediates;
604 /// addLegalFPImmediate - Indicate that this x86 target can instruction
605 /// select the specified FP immediate natively.
606 void addLegalFPImmediate(const APFloat& Imm) {
607 LegalFPImmediates.push_back(Imm);
610 SDValue LowerCallResult(SDValue Chain, SDValue InFlag,
611 CallingConv::ID CallConv, bool isVarArg,
612 const SmallVectorImpl<ISD::InputArg> &Ins,
613 DebugLoc dl, SelectionDAG &DAG,
614 SmallVectorImpl<SDValue> &InVals);
615 SDValue LowerMemArgument(SDValue Chain,
616 CallingConv::ID CallConv,
617 const SmallVectorImpl<ISD::InputArg> &ArgInfo,
618 DebugLoc dl, SelectionDAG &DAG,
619 const CCValAssign &VA, MachineFrameInfo *MFI,
621 SDValue LowerMemOpCallTo(SDValue Chain, SDValue StackPtr, SDValue Arg,
622 DebugLoc dl, SelectionDAG &DAG,
623 const CCValAssign &VA,
624 ISD::ArgFlagsTy Flags);
626 // Call lowering helpers.
627 bool IsCalleePop(bool isVarArg, CallingConv::ID CallConv);
628 SDValue EmitTailCallLoadRetAddr(SelectionDAG &DAG, SDValue &OutRetAddr,
629 SDValue Chain, bool IsTailCall, bool Is64Bit,
630 int FPDiff, DebugLoc dl);
632 CCAssignFn *CCAssignFnForNode(CallingConv::ID CallConv) const;
633 NameDecorationStyle NameDecorationForCallConv(CallingConv::ID CallConv);
634 unsigned GetAlignedArgumentStackSize(unsigned StackSize, SelectionDAG &DAG);
636 std::pair<SDValue,SDValue> FP_TO_INTHelper(SDValue Op, SelectionDAG &DAG,
639 SDValue LowerAsSplatVectorLoad(SDValue SrcOp, EVT VT, DebugLoc dl,
641 SDValue LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG);
642 SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG);
643 SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG);
644 SDValue LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG);
645 SDValue LowerEXTRACT_VECTOR_ELT_SSE4(SDValue Op, SelectionDAG &DAG);
646 SDValue LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG);
647 SDValue LowerINSERT_VECTOR_ELT_SSE4(SDValue Op, SelectionDAG &DAG);
648 SDValue LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG);
649 SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG);
650 SDValue LowerBlockAddress(SDValue Op, SelectionDAG &DAG);
651 SDValue LowerGlobalAddress(const GlobalValue *GV, DebugLoc dl,
652 int64_t Offset, SelectionDAG &DAG) const;
653 SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG);
654 SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG);
655 SDValue LowerExternalSymbol(SDValue Op, SelectionDAG &DAG);
656 SDValue LowerShift(SDValue Op, SelectionDAG &DAG);
657 SDValue BuildFILD(SDValue Op, EVT SrcVT, SDValue Chain, SDValue StackSlot,
659 SDValue LowerSINT_TO_FP(SDValue Op, SelectionDAG &DAG);
660 SDValue LowerUINT_TO_FP(SDValue Op, SelectionDAG &DAG);
661 SDValue LowerUINT_TO_FP_i64(SDValue Op, SelectionDAG &DAG);
662 SDValue LowerUINT_TO_FP_i32(SDValue Op, SelectionDAG &DAG);
663 SDValue LowerFP_TO_SINT(SDValue Op, SelectionDAG &DAG);
664 SDValue LowerFP_TO_UINT(SDValue Op, SelectionDAG &DAG);
665 SDValue LowerFABS(SDValue Op, SelectionDAG &DAG);
666 SDValue LowerFNEG(SDValue Op, SelectionDAG &DAG);
667 SDValue LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG);
668 SDValue LowerSETCC(SDValue Op, SelectionDAG &DAG);
669 SDValue LowerVSETCC(SDValue Op, SelectionDAG &DAG);
670 SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG);
671 SDValue LowerBRCOND(SDValue Op, SelectionDAG &DAG);
672 SDValue LowerMEMSET(SDValue Op, SelectionDAG &DAG);
673 SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG);
674 SDValue LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG);
675 SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG);
676 SDValue LowerVAARG(SDValue Op, SelectionDAG &DAG);
677 SDValue LowerVACOPY(SDValue Op, SelectionDAG &DAG);
678 SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG);
679 SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG);
680 SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG);
681 SDValue LowerFRAME_TO_ARGS_OFFSET(SDValue Op, SelectionDAG &DAG);
682 SDValue LowerEH_RETURN(SDValue Op, SelectionDAG &DAG);
683 SDValue LowerTRAMPOLINE(SDValue Op, SelectionDAG &DAG);
684 SDValue LowerFLT_ROUNDS_(SDValue Op, SelectionDAG &DAG);
685 SDValue LowerCTLZ(SDValue Op, SelectionDAG &DAG);
686 SDValue LowerCTTZ(SDValue Op, SelectionDAG &DAG);
687 SDValue LowerMUL_V2I64(SDValue Op, SelectionDAG &DAG);
688 SDValue LowerXALUO(SDValue Op, SelectionDAG &DAG);
690 SDValue LowerCMP_SWAP(SDValue Op, SelectionDAG &DAG);
691 SDValue LowerLOAD_SUB(SDValue Op, SelectionDAG &DAG);
692 SDValue LowerREADCYCLECOUNTER(SDValue Op, SelectionDAG &DAG);
695 LowerFormalArguments(SDValue Chain,
696 CallingConv::ID CallConv, bool isVarArg,
697 const SmallVectorImpl<ISD::InputArg> &Ins,
698 DebugLoc dl, SelectionDAG &DAG,
699 SmallVectorImpl<SDValue> &InVals);
701 LowerCall(SDValue Chain, SDValue Callee,
702 CallingConv::ID CallConv, bool isVarArg, bool isTailCall,
703 const SmallVectorImpl<ISD::OutputArg> &Outs,
704 const SmallVectorImpl<ISD::InputArg> &Ins,
705 DebugLoc dl, SelectionDAG &DAG,
706 SmallVectorImpl<SDValue> &InVals);
709 LowerReturn(SDValue Chain,
710 CallingConv::ID CallConv, bool isVarArg,
711 const SmallVectorImpl<ISD::OutputArg> &Outs,
712 DebugLoc dl, SelectionDAG &DAG);
715 CanLowerReturn(CallingConv::ID CallConv, bool isVarArg,
716 const SmallVectorImpl<EVT> &OutTys,
717 const SmallVectorImpl<ISD::ArgFlagsTy> &ArgsFlags,
720 void ReplaceATOMIC_BINARY_64(SDNode *N, SmallVectorImpl<SDValue> &Results,
721 SelectionDAG &DAG, unsigned NewOp);
723 SDValue EmitTargetCodeForMemset(SelectionDAG &DAG, DebugLoc dl,
725 SDValue Dst, SDValue Src,
726 SDValue Size, unsigned Align,
727 const Value *DstSV, uint64_t DstSVOff);
728 SDValue EmitTargetCodeForMemcpy(SelectionDAG &DAG, DebugLoc dl,
730 SDValue Dst, SDValue Src,
731 SDValue Size, unsigned Align,
733 const Value *DstSV, uint64_t DstSVOff,
734 const Value *SrcSV, uint64_t SrcSVOff);
736 /// Utility function to emit string processing sse4.2 instructions
737 /// that return in xmm0.
738 /// This takes the instruction to expand, the associated machine basic
739 /// block, the number of args, and whether or not the second arg is
740 /// in memory or not.
741 MachineBasicBlock *EmitPCMP(MachineInstr *BInstr, MachineBasicBlock *BB,
742 unsigned argNum, bool inMem) const;
744 /// Utility function to emit atomic bitwise operations (and, or, xor).
745 /// It takes the bitwise instruction to expand, the associated machine basic
746 /// block, and the associated X86 opcodes for reg/reg and reg/imm.
747 MachineBasicBlock *EmitAtomicBitwiseWithCustomInserter(
748 MachineInstr *BInstr,
749 MachineBasicBlock *BB,
757 TargetRegisterClass *RC,
758 bool invSrc = false) const;
760 MachineBasicBlock *EmitAtomicBit6432WithCustomInserter(
761 MachineInstr *BInstr,
762 MachineBasicBlock *BB,
767 bool invSrc = false) const;
769 /// Utility function to emit atomic min and max. It takes the min/max
770 /// instruction to expand, the associated basic block, and the associated
771 /// cmov opcode for moving the min or max value.
772 MachineBasicBlock *EmitAtomicMinMaxWithCustomInserter(MachineInstr *BInstr,
773 MachineBasicBlock *BB,
774 unsigned cmovOpc) const;
776 /// Utility function to emit the xmm reg save portion of va_start.
777 MachineBasicBlock *EmitVAStartSaveXMMRegsWithCustomInserter(
778 MachineInstr *BInstr,
779 MachineBasicBlock *BB) const;
781 MachineBasicBlock *EmitLoweredSelect(MachineInstr *I,
782 MachineBasicBlock *BB,
783 DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM) const;
785 /// Emit nodes that will be selected as "test Op0,Op0", or something
786 /// equivalent, for use with the given x86 condition code.
787 SDValue EmitTest(SDValue Op0, unsigned X86CC, SelectionDAG &DAG);
789 /// Emit nodes that will be selected as "cmp Op0,Op1", or something
790 /// equivalent, for use with the given x86 condition code.
791 SDValue EmitCmp(SDValue Op0, SDValue Op1, unsigned X86CC,
796 FastISel *createFastISel(MachineFunction &mf,
797 MachineModuleInfo *mmi, DwarfWriter *dw,
798 DenseMap<const Value *, unsigned> &,
799 DenseMap<const BasicBlock *, MachineBasicBlock *> &,
800 DenseMap<const AllocaInst *, int> &
802 , SmallSet<Instruction*, 8> &
808 #endif // X86ISELLOWERING_H