forked from OSchip/llvm-project
415 lines
19 KiB
C++
415 lines
19 KiB
C++
//===-- SIISelLowering.h - SI DAG Lowering Interface ------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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/// \file
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/// SI DAG Lowering interface definition
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_AMDGPU_SIISELLOWERING_H
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#define LLVM_LIB_TARGET_AMDGPU_SIISELLOWERING_H
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#include "AMDGPUISelLowering.h"
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#include "AMDGPUArgumentUsageInfo.h"
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#include "SIInstrInfo.h"
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namespace llvm {
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class SITargetLowering final : public AMDGPUTargetLowering {
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private:
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const GCNSubtarget *Subtarget;
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public:
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MVT getRegisterTypeForCallingConv(LLVMContext &Context,
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CallingConv::ID CC,
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EVT VT) const override;
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unsigned getNumRegistersForCallingConv(LLVMContext &Context,
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CallingConv::ID CC,
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EVT VT) const override;
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unsigned getVectorTypeBreakdownForCallingConv(
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LLVMContext &Context, CallingConv::ID CC, EVT VT, EVT &IntermediateVT,
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unsigned &NumIntermediates, MVT &RegisterVT) const override;
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private:
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SDValue lowerKernArgParameterPtr(SelectionDAG &DAG, const SDLoc &SL,
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SDValue Chain, uint64_t Offset) const;
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SDValue getImplicitArgPtr(SelectionDAG &DAG, const SDLoc &SL) const;
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SDValue lowerKernargMemParameter(SelectionDAG &DAG, EVT VT, EVT MemVT,
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const SDLoc &SL, SDValue Chain,
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uint64_t Offset, unsigned Align, bool Signed,
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const ISD::InputArg *Arg = nullptr) const;
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SDValue lowerStackParameter(SelectionDAG &DAG, CCValAssign &VA,
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const SDLoc &SL, SDValue Chain,
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const ISD::InputArg &Arg) const;
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SDValue getPreloadedValue(SelectionDAG &DAG,
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const SIMachineFunctionInfo &MFI,
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EVT VT,
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AMDGPUFunctionArgInfo::PreloadedValue) const;
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SDValue LowerGlobalAddress(AMDGPUMachineFunction *MFI, SDValue Op,
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SelectionDAG &DAG) const override;
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SDValue lowerImplicitZextParam(SelectionDAG &DAG, SDValue Op,
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MVT VT, unsigned Offset) const;
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SDValue lowerImage(SDValue Op, const AMDGPU::ImageDimIntrinsicInfo *Intr,
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SelectionDAG &DAG) const;
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SDValue lowerSBuffer(EVT VT, SDLoc DL, SDValue Rsrc, SDValue Offset,
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SDValue GLC, SDValue DLC, SelectionDAG &DAG) const;
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SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerINTRINSIC_W_CHAIN(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerINTRINSIC_VOID(SDValue Op, SelectionDAG &DAG) const;
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// The raw.tbuffer and struct.tbuffer intrinsics have two offset args: offset
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// (the offset that is included in bounds checking and swizzling, to be split
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// between the instruction's voffset and immoffset fields) and soffset (the
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// offset that is excluded from bounds checking and swizzling, to go in the
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// instruction's soffset field). This function takes the first kind of
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// offset and figures out how to split it between voffset and immoffset.
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std::pair<SDValue, SDValue> splitBufferOffsets(SDValue Offset,
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SelectionDAG &DAG) const;
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SDValue widenLoad(LoadSDNode *Ld, DAGCombinerInfo &DCI) const;
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SDValue LowerLOAD(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG) const;
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SDValue lowerFastUnsafeFDIV(SDValue Op, SelectionDAG &DAG) const;
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SDValue lowerFDIV_FAST(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerFDIV16(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerFDIV32(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerFDIV64(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerFDIV(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerINT_TO_FP(SDValue Op, SelectionDAG &DAG, bool Signed) const;
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SDValue LowerSTORE(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerTrig(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerATOMIC_CMP_SWAP(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerBRCOND(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const;
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SDValue adjustLoadValueType(unsigned Opcode, MemSDNode *M,
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SelectionDAG &DAG, ArrayRef<SDValue> Ops,
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bool IsIntrinsic = false) const;
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SDValue lowerIntrinsicLoad(MemSDNode *M, bool IsFormat, SelectionDAG &DAG,
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ArrayRef<SDValue> Ops) const;
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// Call DAG.getMemIntrinsicNode for a load, but first widen a dwordx3 type to
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// dwordx4 if on SI.
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SDValue getMemIntrinsicNode(unsigned Opcode, const SDLoc &DL, SDVTList VTList,
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ArrayRef<SDValue> Ops, EVT MemVT,
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MachineMemOperand *MMO, SelectionDAG &DAG) const;
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SDValue handleD16VData(SDValue VData, SelectionDAG &DAG) const;
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/// Converts \p Op, which must be of floating point type, to the
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/// floating point type \p VT, by either extending or truncating it.
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SDValue getFPExtOrFPTrunc(SelectionDAG &DAG,
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SDValue Op,
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const SDLoc &DL,
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EVT VT) const;
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SDValue convertArgType(
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SelectionDAG &DAG, EVT VT, EVT MemVT, const SDLoc &SL, SDValue Val,
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bool Signed, const ISD::InputArg *Arg = nullptr) const;
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/// Custom lowering for ISD::FP_ROUND for MVT::f16.
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SDValue lowerFP_ROUND(SDValue Op, SelectionDAG &DAG) const;
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SDValue lowerFMINNUM_FMAXNUM(SDValue Op, SelectionDAG &DAG) const;
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SDValue getSegmentAperture(unsigned AS, const SDLoc &DL,
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SelectionDAG &DAG) const;
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SDValue lowerADDRSPACECAST(SDValue Op, SelectionDAG &DAG) const;
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SDValue lowerINSERT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const;
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SDValue lowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const;
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SDValue lowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const;
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SDValue lowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const;
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SDValue lowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const;
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SDValue lowerTRAP(SDValue Op, SelectionDAG &DAG) const;
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SDValue lowerDEBUGTRAP(SDValue Op, SelectionDAG &DAG) const;
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SDNode *adjustWritemask(MachineSDNode *&N, SelectionDAG &DAG) const;
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SDValue performUCharToFloatCombine(SDNode *N,
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DAGCombinerInfo &DCI) const;
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SDValue performSHLPtrCombine(SDNode *N,
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unsigned AS,
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EVT MemVT,
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DAGCombinerInfo &DCI) const;
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SDValue performMemSDNodeCombine(MemSDNode *N, DAGCombinerInfo &DCI) const;
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SDValue splitBinaryBitConstantOp(DAGCombinerInfo &DCI, const SDLoc &SL,
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unsigned Opc, SDValue LHS,
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const ConstantSDNode *CRHS) const;
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SDValue performAndCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performOrCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performXorCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performZeroExtendCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performSignExtendInRegCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performClassCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue getCanonicalConstantFP(SelectionDAG &DAG, const SDLoc &SL, EVT VT,
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const APFloat &C) const;
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SDValue performFCanonicalizeCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performFPMed3ImmCombine(SelectionDAG &DAG, const SDLoc &SL,
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SDValue Op0, SDValue Op1) const;
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SDValue performIntMed3ImmCombine(SelectionDAG &DAG, const SDLoc &SL,
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SDValue Op0, SDValue Op1, bool Signed) const;
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SDValue performMinMaxCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performFMed3Combine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performCvtPkRTZCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performExtractVectorEltCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performInsertVectorEltCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue reassociateScalarOps(SDNode *N, SelectionDAG &DAG) const;
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unsigned getFusedOpcode(const SelectionDAG &DAG,
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const SDNode *N0, const SDNode *N1) const;
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SDValue performAddCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performAddCarrySubCarryCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performSubCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performFAddCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performFSubCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performFMACombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performSetCCCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performCvtF32UByteNCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performClampCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performRcpCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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bool isLegalFlatAddressingMode(const AddrMode &AM) const;
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bool isLegalMUBUFAddressingMode(const AddrMode &AM) const;
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unsigned isCFIntrinsic(const SDNode *Intr) const;
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/// \returns True if fixup needs to be emitted for given global value \p GV,
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/// false otherwise.
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bool shouldEmitFixup(const GlobalValue *GV) const;
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/// \returns True if GOT relocation needs to be emitted for given global value
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/// \p GV, false otherwise.
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bool shouldEmitGOTReloc(const GlobalValue *GV) const;
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/// \returns True if PC-relative relocation needs to be emitted for given
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/// global value \p GV, false otherwise.
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bool shouldEmitPCReloc(const GlobalValue *GV) const;
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// Analyze a combined offset from an amdgcn_buffer_ intrinsic and store the
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// three offsets (voffset, soffset and instoffset) into the SDValue[3] array
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// pointed to by Offsets.
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void setBufferOffsets(SDValue CombinedOffset, SelectionDAG &DAG,
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SDValue *Offsets, unsigned Align = 4) const;
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// Handle 8 bit and 16 bit buffer loads
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SDValue handleByteShortBufferLoads(SelectionDAG &DAG, EVT LoadVT, SDLoc DL,
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ArrayRef<SDValue> Ops, MemSDNode *M) const;
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// Handle 8 bit and 16 bit buffer stores
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SDValue handleByteShortBufferStores(SelectionDAG &DAG, EVT VDataType,
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SDLoc DL, SDValue Ops[],
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MemSDNode *M) const;
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public:
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SITargetLowering(const TargetMachine &tm, const GCNSubtarget &STI);
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const GCNSubtarget *getSubtarget() const;
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bool isFPExtFoldable(unsigned Opcode, EVT DestVT, EVT SrcVT) const override;
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bool isShuffleMaskLegal(ArrayRef<int> /*Mask*/, EVT /*VT*/) const override;
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bool getTgtMemIntrinsic(IntrinsicInfo &, const CallInst &,
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MachineFunction &MF,
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unsigned IntrinsicID) const override;
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bool getAddrModeArguments(IntrinsicInst * /*I*/,
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SmallVectorImpl<Value*> &/*Ops*/,
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Type *&/*AccessTy*/) const override;
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bool isLegalGlobalAddressingMode(const AddrMode &AM) const;
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bool isLegalAddressingMode(const DataLayout &DL, const AddrMode &AM, Type *Ty,
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unsigned AS,
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Instruction *I = nullptr) const override;
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bool canMergeStoresTo(unsigned AS, EVT MemVT,
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const SelectionDAG &DAG) const override;
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bool allowsMisalignedMemoryAccesses(
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EVT VT, unsigned AS, unsigned Align,
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MachineMemOperand::Flags Flags = MachineMemOperand::MONone,
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bool *IsFast = nullptr) const override;
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EVT getOptimalMemOpType(uint64_t Size, unsigned DstAlign,
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unsigned SrcAlign, bool IsMemset,
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bool ZeroMemset,
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bool MemcpyStrSrc,
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const AttributeList &FuncAttributes) const override;
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bool isMemOpUniform(const SDNode *N) const;
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bool isMemOpHasNoClobberedMemOperand(const SDNode *N) const;
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bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override;
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bool isFreeAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override;
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TargetLoweringBase::LegalizeTypeAction
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getPreferredVectorAction(MVT VT) const override;
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bool shouldConvertConstantLoadToIntImm(const APInt &Imm,
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Type *Ty) const override;
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bool isTypeDesirableForOp(unsigned Op, EVT VT) const override;
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bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const override;
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bool supportSplitCSR(MachineFunction *MF) const override;
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void initializeSplitCSR(MachineBasicBlock *Entry) const override;
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void insertCopiesSplitCSR(
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MachineBasicBlock *Entry,
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const SmallVectorImpl<MachineBasicBlock *> &Exits) const override;
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SDValue LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv,
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bool isVarArg,
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const SmallVectorImpl<ISD::InputArg> &Ins,
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const SDLoc &DL, SelectionDAG &DAG,
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SmallVectorImpl<SDValue> &InVals) const override;
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bool CanLowerReturn(CallingConv::ID CallConv,
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MachineFunction &MF, bool isVarArg,
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const SmallVectorImpl<ISD::OutputArg> &Outs,
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LLVMContext &Context) const override;
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SDValue LowerReturn(SDValue Chain, CallingConv::ID CallConv, bool IsVarArg,
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const SmallVectorImpl<ISD::OutputArg> &Outs,
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const SmallVectorImpl<SDValue> &OutVals, const SDLoc &DL,
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SelectionDAG &DAG) const override;
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void passSpecialInputs(
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CallLoweringInfo &CLI,
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CCState &CCInfo,
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const SIMachineFunctionInfo &Info,
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SmallVectorImpl<std::pair<unsigned, SDValue>> &RegsToPass,
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SmallVectorImpl<SDValue> &MemOpChains,
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SDValue Chain) const;
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SDValue LowerCallResult(SDValue Chain, SDValue InFlag,
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CallingConv::ID CallConv, bool isVarArg,
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const SmallVectorImpl<ISD::InputArg> &Ins,
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const SDLoc &DL, SelectionDAG &DAG,
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SmallVectorImpl<SDValue> &InVals, bool isThisReturn,
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SDValue ThisVal) const;
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bool mayBeEmittedAsTailCall(const CallInst *) const override;
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bool isEligibleForTailCallOptimization(
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SDValue Callee, CallingConv::ID CalleeCC, bool isVarArg,
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const SmallVectorImpl<ISD::OutputArg> &Outs,
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const SmallVectorImpl<SDValue> &OutVals,
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const SmallVectorImpl<ISD::InputArg> &Ins, SelectionDAG &DAG) const;
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SDValue LowerCall(CallLoweringInfo &CLI,
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SmallVectorImpl<SDValue> &InVals) const override;
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unsigned getRegisterByName(const char* RegName, EVT VT,
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SelectionDAG &DAG) const override;
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MachineBasicBlock *splitKillBlock(MachineInstr &MI,
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MachineBasicBlock *BB) const;
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void bundleInstWithWaitcnt(MachineInstr &MI) const;
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MachineBasicBlock *emitGWSMemViolTestLoop(MachineInstr &MI,
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MachineBasicBlock *BB) const;
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MachineBasicBlock *
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EmitInstrWithCustomInserter(MachineInstr &MI,
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MachineBasicBlock *BB) const override;
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bool hasBitPreservingFPLogic(EVT VT) const override;
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bool enableAggressiveFMAFusion(EVT VT) const override;
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EVT getSetCCResultType(const DataLayout &DL, LLVMContext &Context,
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EVT VT) const override;
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MVT getScalarShiftAmountTy(const DataLayout &, EVT) const override;
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bool isFMAFasterThanFMulAndFAdd(EVT VT) const override;
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SDValue splitUnaryVectorOp(SDValue Op, SelectionDAG &DAG) const;
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SDValue splitBinaryVectorOp(SDValue Op, SelectionDAG &DAG) const;
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SDValue splitTernaryVectorOp(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override;
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void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue> &Results,
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SelectionDAG &DAG) const override;
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SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override;
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SDNode *PostISelFolding(MachineSDNode *N, SelectionDAG &DAG) const override;
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void AdjustInstrPostInstrSelection(MachineInstr &MI,
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SDNode *Node) const override;
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SDNode *legalizeTargetIndependentNode(SDNode *Node, SelectionDAG &DAG) const;
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MachineSDNode *wrapAddr64Rsrc(SelectionDAG &DAG, const SDLoc &DL,
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SDValue Ptr) const;
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MachineSDNode *buildRSRC(SelectionDAG &DAG, const SDLoc &DL, SDValue Ptr,
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uint32_t RsrcDword1, uint64_t RsrcDword2And3) const;
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std::pair<unsigned, const TargetRegisterClass *>
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getRegForInlineAsmConstraint(const TargetRegisterInfo *TRI,
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StringRef Constraint, MVT VT) const override;
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ConstraintType getConstraintType(StringRef Constraint) const override;
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SDValue copyToM0(SelectionDAG &DAG, SDValue Chain, const SDLoc &DL,
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SDValue V) const;
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void finalizeLowering(MachineFunction &MF) const override;
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void computeKnownBitsForFrameIndex(const SDValue Op,
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KnownBits &Known,
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const APInt &DemandedElts,
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const SelectionDAG &DAG,
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unsigned Depth = 0) const override;
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bool isSDNodeSourceOfDivergence(const SDNode *N,
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FunctionLoweringInfo *FLI, LegacyDivergenceAnalysis *DA) const override;
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bool isCanonicalized(SelectionDAG &DAG, SDValue Op,
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unsigned MaxDepth = 5) const;
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bool denormalsEnabledForType(EVT VT) const;
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bool isKnownNeverNaNForTargetNode(SDValue Op,
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const SelectionDAG &DAG,
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bool SNaN = false,
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unsigned Depth = 0) const override;
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AtomicExpansionKind shouldExpandAtomicRMWInIR(AtomicRMWInst *) const override;
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unsigned getPrefLoopAlignment(MachineLoop *ML) const override;
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void allocateHSAUserSGPRs(CCState &CCInfo,
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MachineFunction &MF,
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const SIRegisterInfo &TRI,
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SIMachineFunctionInfo &Info) const;
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void allocateSystemSGPRs(CCState &CCInfo,
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MachineFunction &MF,
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SIMachineFunctionInfo &Info,
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CallingConv::ID CallConv,
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bool IsShader) const;
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void allocateSpecialEntryInputVGPRs(CCState &CCInfo,
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MachineFunction &MF,
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const SIRegisterInfo &TRI,
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SIMachineFunctionInfo &Info) const;
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void allocateSpecialInputSGPRs(
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CCState &CCInfo,
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MachineFunction &MF,
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const SIRegisterInfo &TRI,
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SIMachineFunctionInfo &Info) const;
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void allocateSpecialInputVGPRs(CCState &CCInfo,
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MachineFunction &MF,
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const SIRegisterInfo &TRI,
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SIMachineFunctionInfo &Info) const;
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};
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} // End namespace llvm
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#endif
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