1 //===-- SIISelLowering.h - SI 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 //===----------------------------------------------------------------------===//
11 /// \brief SI DAG Lowering interface definition
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_LIB_TARGET_AMDGPU_SIISELLOWERING_H
16 #define LLVM_LIB_TARGET_AMDGPU_SIISELLOWERING_H
18 #include "AMDGPUISelLowering.h"
19 #include "SIInstrInfo.h"
23 class SITargetLowering final : public AMDGPUTargetLowering {
24 SDValue lowerKernArgParameterPtr(SelectionDAG &DAG, const SDLoc &SL,
25 SDValue Chain, uint64_t Offset) const;
26 SDValue lowerKernargMemParameter(SelectionDAG &DAG, EVT VT, EVT MemVT,
27 const SDLoc &SL, SDValue Chain,
28 uint64_t Offset, bool Signed,
29 const ISD::InputArg *Arg = nullptr) const;
31 SDValue LowerGlobalAddress(AMDGPUMachineFunction *MFI, SDValue Op,
32 SelectionDAG &DAG) const override;
33 SDValue lowerImplicitZextParam(SelectionDAG &DAG, SDValue Op,
34 MVT VT, unsigned Offset) const;
36 SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const;
37 SDValue LowerINTRINSIC_W_CHAIN(SDValue Op, SelectionDAG &DAG) const;
38 SDValue LowerINTRINSIC_VOID(SDValue Op, SelectionDAG &DAG) const;
39 SDValue LowerLOAD(SDValue Op, SelectionDAG &DAG) const;
40 SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG) const;
41 SDValue lowerFastUnsafeFDIV(SDValue Op, SelectionDAG &DAG) const;
42 SDValue lowerFDIV_FAST(SDValue Op, SelectionDAG &DAG) const;
43 SDValue LowerFDIV16(SDValue Op, SelectionDAG &DAG) const;
44 SDValue LowerFDIV32(SDValue Op, SelectionDAG &DAG) const;
45 SDValue LowerFDIV64(SDValue Op, SelectionDAG &DAG) const;
46 SDValue LowerFDIV(SDValue Op, SelectionDAG &DAG) const;
47 SDValue LowerINT_TO_FP(SDValue Op, SelectionDAG &DAG, bool Signed) const;
48 SDValue LowerSTORE(SDValue Op, SelectionDAG &DAG) const;
49 SDValue LowerTrig(SDValue Op, SelectionDAG &DAG) const;
50 SDValue LowerATOMIC_CMP_SWAP(SDValue Op, SelectionDAG &DAG) const;
51 SDValue LowerBRCOND(SDValue Op, SelectionDAG &DAG) const;
53 /// \brief Converts \p Op, which must be of floating point type, to the
54 /// floating point type \p VT, by either extending or truncating it.
55 SDValue getFPExtOrFPTrunc(SelectionDAG &DAG,
60 SDValue convertArgType(
61 SelectionDAG &DAG, EVT VT, EVT MemVT, const SDLoc &SL, SDValue Val,
62 bool Signed, const ISD::InputArg *Arg = nullptr) const;
64 /// \brief Custom lowering for ISD::FP_ROUND for MVT::f16.
65 SDValue lowerFP_ROUND(SDValue Op, SelectionDAG &DAG) const;
67 SDValue getSegmentAperture(unsigned AS, const SDLoc &DL,
68 SelectionDAG &DAG) const;
70 SDValue lowerADDRSPACECAST(SDValue Op, SelectionDAG &DAG) const;
71 SDValue lowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const;
72 SDValue lowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const;
73 SDValue lowerTRAP(SDValue Op, SelectionDAG &DAG) const;
75 void adjustWritemask(MachineSDNode *&N, SelectionDAG &DAG) const;
77 SDValue performUCharToFloatCombine(SDNode *N,
78 DAGCombinerInfo &DCI) const;
79 SDValue performSHLPtrCombine(SDNode *N,
81 DAGCombinerInfo &DCI) const;
83 SDValue performMemSDNodeCombine(MemSDNode *N, DAGCombinerInfo &DCI) const;
85 SDValue splitBinaryBitConstantOp(DAGCombinerInfo &DCI, const SDLoc &SL,
86 unsigned Opc, SDValue LHS,
87 const ConstantSDNode *CRHS) const;
89 SDValue performAndCombine(SDNode *N, DAGCombinerInfo &DCI) const;
90 SDValue performOrCombine(SDNode *N, DAGCombinerInfo &DCI) const;
91 SDValue performXorCombine(SDNode *N, DAGCombinerInfo &DCI) const;
92 SDValue performZeroExtendCombine(SDNode *N, DAGCombinerInfo &DCI) const;
93 SDValue performClassCombine(SDNode *N, DAGCombinerInfo &DCI) const;
94 SDValue performFCanonicalizeCombine(SDNode *N, DAGCombinerInfo &DCI) const;
96 SDValue performFPMed3ImmCombine(SelectionDAG &DAG, const SDLoc &SL,
97 SDValue Op0, SDValue Op1) const;
98 SDValue performIntMed3ImmCombine(SelectionDAG &DAG, const SDLoc &SL,
99 SDValue Op0, SDValue Op1, bool Signed) const;
100 SDValue performMinMaxCombine(SDNode *N, DAGCombinerInfo &DCI) const;
101 SDValue performFMed3Combine(SDNode *N, DAGCombinerInfo &DCI) const;
102 SDValue performCvtPkRTZCombine(SDNode *N, DAGCombinerInfo &DCI) const;
103 SDValue performExtractVectorEltCombine(SDNode *N, DAGCombinerInfo &DCI) const;
105 unsigned getFusedOpcode(const SelectionDAG &DAG,
106 const SDNode *N0, const SDNode *N1) const;
107 SDValue performFAddCombine(SDNode *N, DAGCombinerInfo &DCI) const;
108 SDValue performFSubCombine(SDNode *N, DAGCombinerInfo &DCI) const;
109 SDValue performSetCCCombine(SDNode *N, DAGCombinerInfo &DCI) const;
110 SDValue performCvtF32UByteNCombine(SDNode *N, DAGCombinerInfo &DCI) const;
112 bool isLegalFlatAddressingMode(const AddrMode &AM) const;
113 bool isLegalMUBUFAddressingMode(const AddrMode &AM) const;
115 unsigned isCFIntrinsic(const SDNode *Intr) const;
117 void createDebuggerPrologueStackObjects(MachineFunction &MF) const;
119 /// \returns True if fixup needs to be emitted for given global value \p GV,
121 bool shouldEmitFixup(const GlobalValue *GV) const;
123 /// \returns True if GOT relocation needs to be emitted for given global value
124 /// \p GV, false otherwise.
125 bool shouldEmitGOTReloc(const GlobalValue *GV) const;
127 /// \returns True if PC-relative relocation needs to be emitted for given
128 /// global value \p GV, false otherwise.
129 bool shouldEmitPCReloc(const GlobalValue *GV) const;
132 SITargetLowering(const TargetMachine &tm, const SISubtarget &STI);
134 const SISubtarget *getSubtarget() const;
136 bool isShuffleMaskLegal(const SmallVectorImpl<int> &/*Mask*/,
137 EVT /*VT*/) const override;
139 bool getTgtMemIntrinsic(IntrinsicInfo &, const CallInst &,
140 unsigned IntrinsicID) const override;
142 bool getAddrModeArguments(IntrinsicInst * /*I*/,
143 SmallVectorImpl<Value*> &/*Ops*/,
144 Type *&/*AccessTy*/) const override;
146 bool isLegalAddressingMode(const DataLayout &DL, const AddrMode &AM, Type *Ty,
147 unsigned AS) const override;
149 bool allowsMisalignedMemoryAccesses(EVT VT, unsigned AS,
151 bool *IsFast) const override;
153 EVT getOptimalMemOpType(uint64_t Size, unsigned DstAlign,
154 unsigned SrcAlign, bool IsMemset,
157 MachineFunction &MF) const override;
159 bool isMemOpUniform(const SDNode *N) const;
160 bool isMemOpHasNoClobberedMemOperand(const SDNode *N) const;
161 bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override;
162 bool isCheapAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override;
164 TargetLoweringBase::LegalizeTypeAction
165 getPreferredVectorAction(EVT VT) const override;
167 bool shouldConvertConstantLoadToIntImm(const APInt &Imm,
168 Type *Ty) const override;
170 bool isTypeDesirableForOp(unsigned Op, EVT VT) const override;
172 bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const override;
174 SDValue LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv,
176 const SmallVectorImpl<ISD::InputArg> &Ins,
177 const SDLoc &DL, SelectionDAG &DAG,
178 SmallVectorImpl<SDValue> &InVals) const override;
180 SDValue LowerReturn(SDValue Chain, CallingConv::ID CallConv, bool isVarArg,
181 const SmallVectorImpl<ISD::OutputArg> &Outs,
182 const SmallVectorImpl<SDValue> &OutVals, const SDLoc &DL,
183 SelectionDAG &DAG) const override;
185 unsigned getRegisterByName(const char* RegName, EVT VT,
186 SelectionDAG &DAG) const override;
188 MachineBasicBlock *splitKillBlock(MachineInstr &MI,
189 MachineBasicBlock *BB) const;
192 EmitInstrWithCustomInserter(MachineInstr &MI,
193 MachineBasicBlock *BB) const override;
194 bool enableAggressiveFMAFusion(EVT VT) const override;
195 EVT getSetCCResultType(const DataLayout &DL, LLVMContext &Context,
196 EVT VT) const override;
197 MVT getScalarShiftAmountTy(const DataLayout &, EVT) const override;
198 bool isFMAFasterThanFMulAndFAdd(EVT VT) const override;
199 SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override;
200 void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue> &Results,
201 SelectionDAG &DAG) const override;
203 SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override;
204 SDNode *PostISelFolding(MachineSDNode *N, SelectionDAG &DAG) const override;
205 void AdjustInstrPostInstrSelection(MachineInstr &MI,
206 SDNode *Node) const override;
208 SDValue CreateLiveInRegister(SelectionDAG &DAG, const TargetRegisterClass *RC,
209 unsigned Reg, EVT VT) const override;
210 SDNode *legalizeTargetIndependentNode(SDNode *Node, SelectionDAG &DAG) const;
212 MachineSDNode *wrapAddr64Rsrc(SelectionDAG &DAG, const SDLoc &DL,
214 MachineSDNode *buildRSRC(SelectionDAG &DAG, const SDLoc &DL, SDValue Ptr,
215 uint32_t RsrcDword1, uint64_t RsrcDword2And3) const;
216 std::pair<unsigned, const TargetRegisterClass *>
217 getRegForInlineAsmConstraint(const TargetRegisterInfo *TRI,
218 StringRef Constraint, MVT VT) const override;
219 ConstraintType getConstraintType(StringRef Constraint) const override;
220 SDValue copyToM0(SelectionDAG &DAG, SDValue Chain, const SDLoc &DL,
224 } // End namespace llvm