//===-- SIISelLowering.cpp - SI DAG Lowering Implementation ---------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // /// \file /// Custom DAG lowering for SI // //===----------------------------------------------------------------------===// #include "SIISelLowering.h" #include "AMDGPU.h" #include "AMDGPUInstrInfo.h" #include "AMDGPUTargetMachine.h" #include "GCNSubtarget.h" #include "MCTargetDesc/AMDGPUMCTargetDesc.h" #include "SIMachineFunctionInfo.h" #include "SIRegisterInfo.h" #include "llvm/ADT/APInt.h" #include "llvm/ADT/FloatingPointMode.h" #include "llvm/ADT/Statistic.h" #include "llvm/Analysis/OptimizationRemarkEmitter.h" #include "llvm/Analysis/UniformityAnalysis.h" #include "llvm/BinaryFormat/ELF.h" #include "llvm/CodeGen/Analysis.h" #include "llvm/CodeGen/ByteProvider.h" #include "llvm/CodeGen/FunctionLoweringInfo.h" #include "llvm/CodeGen/GlobalISel/GISelKnownBits.h" #include "llvm/CodeGen/GlobalISel/GenericMachineInstrs.h" #include "llvm/CodeGen/GlobalISel/MIPatternMatch.h" #include "llvm/CodeGen/MachineFrameInfo.h" #include "llvm/CodeGen/MachineFunction.h" #include "llvm/CodeGen/MachineLoopInfo.h" #include "llvm/IR/DiagnosticInfo.h" #include "llvm/IR/IRBuilder.h" #include "llvm/IR/IntrinsicInst.h" #include "llvm/IR/IntrinsicsAMDGPU.h" #include "llvm/IR/IntrinsicsR600.h" #include "llvm/Support/CommandLine.h" #include "llvm/Support/KnownBits.h" #include "llvm/Support/ModRef.h" #include "llvm/Transforms/Utils/LowerAtomic.h" #include <optional> usingnamespacellvm; #define DEBUG_TYPE … STATISTIC(NumTailCalls, "Number of tail calls"); static cl::opt<bool> DisableLoopAlignment( "amdgpu-disable-loop-alignment", cl::desc("Do not align and prefetch loops"), cl::init(false)); static cl::opt<bool> UseDivergentRegisterIndexing( "amdgpu-use-divergent-register-indexing", cl::Hidden, cl::desc("Use indirect register addressing for divergent indexes"), cl::init(false)); static bool denormalModeIsFlushAllF32(const MachineFunction &MF) { … } static bool denormalModeIsFlushAllF64F16(const MachineFunction &MF) { … } static unsigned findFirstFreeSGPR(CCState &CCInfo) { … } SITargetLowering::SITargetLowering(const TargetMachine &TM, const GCNSubtarget &STI) : … { … } const GCNSubtarget *SITargetLowering::getSubtarget() const { … } ArrayRef<MCPhysReg> SITargetLowering::getRoundingControlRegisters() const { … } //===----------------------------------------------------------------------===// // TargetLowering queries //===----------------------------------------------------------------------===// // v_mad_mix* support a conversion from f16 to f32. // // There is only one special case when denormals are enabled we don't currently, // where this is OK to use. bool SITargetLowering::isFPExtFoldable(const SelectionDAG &DAG, unsigned Opcode, EVT DestVT, EVT SrcVT) const { … } bool SITargetLowering::isFPExtFoldable(const MachineInstr &MI, unsigned Opcode, LLT DestTy, LLT SrcTy) const { … } bool SITargetLowering::isShuffleMaskLegal(ArrayRef<int>, EVT) const { … } MVT SITargetLowering::getRegisterTypeForCallingConv(LLVMContext &Context, CallingConv::ID CC, EVT VT) const { … } unsigned SITargetLowering::getNumRegistersForCallingConv(LLVMContext &Context, CallingConv::ID CC, EVT VT) const { … } unsigned SITargetLowering::getVectorTypeBreakdownForCallingConv( LLVMContext &Context, CallingConv::ID CC, EVT VT, EVT &IntermediateVT, unsigned &NumIntermediates, MVT &RegisterVT) const { … } static EVT memVTFromLoadIntrData(const SITargetLowering &TLI, const DataLayout &DL, Type *Ty, unsigned MaxNumLanes) { … } // Peek through TFE struct returns to only use the data size. static EVT memVTFromLoadIntrReturn(const SITargetLowering &TLI, const DataLayout &DL, Type *Ty, unsigned MaxNumLanes) { … } /// Map address space 7 to MVT::v5i32 because that's its in-memory /// representation. This return value is vector-typed because there is no /// MVT::i160 and it is not clear if one can be added. While this could /// cause issues during codegen, these address space 7 pointers will be /// rewritten away by then. Therefore, we can return MVT::v5i32 in order /// to allow pre-codegen passes that query TargetTransformInfo, often for cost /// modeling, to work. MVT SITargetLowering::getPointerTy(const DataLayout &DL, unsigned AS) const { … } /// Similarly, the in-memory representation of a p7 is {p8, i32}, aka /// v8i32 when padding is added. /// The in-memory representation of a p9 is {p8, i32, i32}, which is /// also v8i32 with padding. MVT SITargetLowering::getPointerMemTy(const DataLayout &DL, unsigned AS) const { … } bool SITargetLowering::getTgtMemIntrinsic(IntrinsicInfo &Info, const CallInst &CI, MachineFunction &MF, unsigned IntrID) const { … } void SITargetLowering::CollectTargetIntrinsicOperands( const CallInst &I, SmallVectorImpl<SDValue> &Ops, SelectionDAG &DAG) const { … } bool SITargetLowering::getAddrModeArguments(IntrinsicInst *II, SmallVectorImpl<Value*> &Ops, Type *&AccessTy) const { … } bool SITargetLowering::isLegalFlatAddressingMode(const AddrMode &AM, unsigned AddrSpace) const { … } bool SITargetLowering::isLegalGlobalAddressingMode(const AddrMode &AM) const { … } bool SITargetLowering::isLegalMUBUFAddressingMode(const AddrMode &AM) const { … } bool SITargetLowering::isLegalAddressingMode(const DataLayout &DL, const AddrMode &AM, Type *Ty, unsigned AS, Instruction *I) const { … } bool SITargetLowering::canMergeStoresTo(unsigned AS, EVT MemVT, const MachineFunction &MF) const { … } bool SITargetLowering::allowsMisalignedMemoryAccessesImpl( unsigned Size, unsigned AddrSpace, Align Alignment, MachineMemOperand::Flags Flags, unsigned *IsFast) const { … } bool SITargetLowering::allowsMisalignedMemoryAccesses( EVT VT, unsigned AddrSpace, Align Alignment, MachineMemOperand::Flags Flags, unsigned *IsFast) const { … } EVT SITargetLowering::getOptimalMemOpType( const MemOp &Op, const AttributeList &FuncAttributes) const { … } bool SITargetLowering::isMemOpHasNoClobberedMemOperand(const SDNode *N) const { … } bool SITargetLowering::isNonGlobalAddrSpace(unsigned AS) { … } bool SITargetLowering::isFreeAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const { … } TargetLoweringBase::LegalizeTypeAction SITargetLowering::getPreferredVectorAction(MVT VT) const { … } bool SITargetLowering::shouldConvertConstantLoadToIntImm(const APInt &Imm, Type *Ty) const { … } bool SITargetLowering::isExtractSubvectorCheap(EVT ResVT, EVT SrcVT, unsigned Index) const { … } bool SITargetLowering::isTypeDesirableForOp(unsigned Op, EVT VT) const { … } SDValue SITargetLowering::lowerKernArgParameterPtr(SelectionDAG &DAG, const SDLoc &SL, SDValue Chain, uint64_t Offset) const { … } SDValue SITargetLowering::getImplicitArgPtr(SelectionDAG &DAG, const SDLoc &SL) const { … } SDValue SITargetLowering::getLDSKernelId(SelectionDAG &DAG, const SDLoc &SL) const { … } SDValue SITargetLowering::convertArgType(SelectionDAG &DAG, EVT VT, EVT MemVT, const SDLoc &SL, SDValue Val, bool Signed, const ISD::InputArg *Arg) const { … } SDValue SITargetLowering::lowerKernargMemParameter( SelectionDAG &DAG, EVT VT, EVT MemVT, const SDLoc &SL, SDValue Chain, uint64_t Offset, Align Alignment, bool Signed, const ISD::InputArg *Arg) const { … } SDValue SITargetLowering::lowerStackParameter(SelectionDAG &DAG, CCValAssign &VA, const SDLoc &SL, SDValue Chain, const ISD::InputArg &Arg) const { … } SDValue SITargetLowering::getPreloadedValue(SelectionDAG &DAG, const SIMachineFunctionInfo &MFI, EVT VT, AMDGPUFunctionArgInfo::PreloadedValue PVID) const { … } static void processPSInputArgs(SmallVectorImpl<ISD::InputArg> &Splits, CallingConv::ID CallConv, ArrayRef<ISD::InputArg> Ins, BitVector &Skipped, FunctionType *FType, SIMachineFunctionInfo *Info) { … } // Allocate special inputs passed in VGPRs. void SITargetLowering::allocateSpecialEntryInputVGPRs(CCState &CCInfo, MachineFunction &MF, const SIRegisterInfo &TRI, SIMachineFunctionInfo &Info) const { … } // Try to allocate a VGPR at the end of the argument list, or if no argument // VGPRs are left allocating a stack slot. // If \p Mask is is given it indicates bitfield position in the register. // If \p Arg is given use it with new ]p Mask instead of allocating new. static ArgDescriptor allocateVGPR32Input(CCState &CCInfo, unsigned Mask = ~0u, ArgDescriptor Arg = ArgDescriptor()) { … } static ArgDescriptor allocateSGPR32InputImpl(CCState &CCInfo, const TargetRegisterClass *RC, unsigned NumArgRegs) { … } // If this has a fixed position, we still should allocate the register in the // CCInfo state. Technically we could get away with this for values passed // outside of the normal argument range. static void allocateFixedSGPRInputImpl(CCState &CCInfo, const TargetRegisterClass *RC, MCRegister Reg) { … } static void allocateSGPR32Input(CCState &CCInfo, ArgDescriptor &Arg) { … } static void allocateSGPR64Input(CCState &CCInfo, ArgDescriptor &Arg) { … } /// Allocate implicit function VGPR arguments at the end of allocated user /// arguments. void SITargetLowering::allocateSpecialInputVGPRs( CCState &CCInfo, MachineFunction &MF, const SIRegisterInfo &TRI, SIMachineFunctionInfo &Info) const { … } /// Allocate implicit function VGPR arguments in fixed registers. void SITargetLowering::allocateSpecialInputVGPRsFixed( CCState &CCInfo, MachineFunction &MF, const SIRegisterInfo &TRI, SIMachineFunctionInfo &Info) const { … } void SITargetLowering::allocateSpecialInputSGPRs( CCState &CCInfo, MachineFunction &MF, const SIRegisterInfo &TRI, SIMachineFunctionInfo &Info) const { … } // Allocate special inputs passed in user SGPRs. void SITargetLowering::allocateHSAUserSGPRs(CCState &CCInfo, MachineFunction &MF, const SIRegisterInfo &TRI, SIMachineFunctionInfo &Info) const { … } // Allocate pre-loaded kernel arguemtns. Arguments to be preloading must be // sequential starting from the first argument. void SITargetLowering::allocatePreloadKernArgSGPRs( CCState &CCInfo, SmallVectorImpl<CCValAssign> &ArgLocs, const SmallVectorImpl<ISD::InputArg> &Ins, MachineFunction &MF, const SIRegisterInfo &TRI, SIMachineFunctionInfo &Info) const { … } void SITargetLowering::allocateLDSKernelId(CCState &CCInfo, MachineFunction &MF, const SIRegisterInfo &TRI, SIMachineFunctionInfo &Info) const { … } // Allocate special input registers that are initialized per-wave. void SITargetLowering::allocateSystemSGPRs(CCState &CCInfo, MachineFunction &MF, SIMachineFunctionInfo &Info, CallingConv::ID CallConv, bool IsShader) const { … } static void reservePrivateMemoryRegs(const TargetMachine &TM, MachineFunction &MF, const SIRegisterInfo &TRI, SIMachineFunctionInfo &Info) { … } bool SITargetLowering::supportSplitCSR(MachineFunction *MF) const { … } void SITargetLowering::initializeSplitCSR(MachineBasicBlock *Entry) const { … } void SITargetLowering::insertCopiesSplitCSR( MachineBasicBlock *Entry, const SmallVectorImpl<MachineBasicBlock *> &Exits) const { … } SDValue SITargetLowering::LowerFormalArguments( SDValue Chain, CallingConv::ID CallConv, bool isVarArg, const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &DL, SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const { … } // TODO: If return values can't fit in registers, we should return as many as // possible in registers before passing on stack. bool SITargetLowering::CanLowerReturn( CallingConv::ID CallConv, MachineFunction &MF, bool IsVarArg, const SmallVectorImpl<ISD::OutputArg> &Outs, LLVMContext &Context) const { … } SDValue SITargetLowering::LowerReturn(SDValue Chain, CallingConv::ID CallConv, bool isVarArg, const SmallVectorImpl<ISD::OutputArg> &Outs, const SmallVectorImpl<SDValue> &OutVals, const SDLoc &DL, SelectionDAG &DAG) const { … } SDValue SITargetLowering::LowerCallResult( SDValue Chain, SDValue InGlue, CallingConv::ID CallConv, bool IsVarArg, const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &DL, SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals, bool IsThisReturn, SDValue ThisVal) const { … } // Add code to pass special inputs required depending on used features separate // from the explicit user arguments present in the IR. void SITargetLowering::passSpecialInputs( CallLoweringInfo &CLI, CCState &CCInfo, const SIMachineFunctionInfo &Info, SmallVectorImpl<std::pair<unsigned, SDValue>> &RegsToPass, SmallVectorImpl<SDValue> &MemOpChains, SDValue Chain) const { … } static bool canGuaranteeTCO(CallingConv::ID CC) { … } /// Return true if we might ever do TCO for calls with this calling convention. static bool mayTailCallThisCC(CallingConv::ID CC) { … } bool SITargetLowering::isEligibleForTailCallOptimization( SDValue Callee, CallingConv::ID CalleeCC, bool IsVarArg, const SmallVectorImpl<ISD::OutputArg> &Outs, const SmallVectorImpl<SDValue> &OutVals, const SmallVectorImpl<ISD::InputArg> &Ins, SelectionDAG &DAG) const { … } bool SITargetLowering::mayBeEmittedAsTailCall(const CallInst *CI) const { … } // The wave scratch offset register is used as the global base pointer. SDValue SITargetLowering::LowerCall(CallLoweringInfo &CLI, SmallVectorImpl<SDValue> &InVals) const { … } // This is identical to the default implementation in ExpandDYNAMIC_STACKALLOC, // except for applying the wave size scale to the increment amount. SDValue SITargetLowering::lowerDYNAMIC_STACKALLOCImpl( SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::LowerSTACKSAVE(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerGET_ROUNDING(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerSET_ROUNDING(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerPREFETCH(SDValue Op, SelectionDAG &DAG) const { … } // Work around DAG legality rules only based on the result type. SDValue SITargetLowering::lowerFP_EXTEND(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerGET_FPENV(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerSET_FPENV(SDValue Op, SelectionDAG &DAG) const { … } Register SITargetLowering::getRegisterByName(const char* RegName, LLT VT, const MachineFunction &MF) const { … } // If kill is not the last instruction, split the block so kill is always a // proper terminator. MachineBasicBlock * SITargetLowering::splitKillBlock(MachineInstr &MI, MachineBasicBlock *BB) const { … } // Split block \p MBB at \p MI, as to insert a loop. If \p InstInLoop is true, // \p MI will be the only instruction in the loop body block. Otherwise, it will // be the first instruction in the remainder block. // /// \returns { LoopBody, Remainder } static std::pair<MachineBasicBlock *, MachineBasicBlock *> splitBlockForLoop(MachineInstr &MI, MachineBasicBlock &MBB, bool InstInLoop) { … } /// Insert \p MI into a BUNDLE with an S_WAITCNT 0 immediately following it. void SITargetLowering::bundleInstWithWaitcnt(MachineInstr &MI) const { … } MachineBasicBlock * SITargetLowering::emitGWSMemViolTestLoop(MachineInstr &MI, MachineBasicBlock *BB) const { … } // Do a v_movrels_b32 or v_movreld_b32 for each unique value of \p IdxReg in the // wavefront. If the value is uniform and just happens to be in a VGPR, this // will only do one iteration. In the worst case, this will loop 64 times. // // TODO: Just use v_readlane_b32 if we know the VGPR has a uniform value. static MachineBasicBlock::iterator emitLoadM0FromVGPRLoop(const SIInstrInfo *TII, MachineRegisterInfo &MRI, MachineBasicBlock &OrigBB, MachineBasicBlock &LoopBB, const DebugLoc &DL, const MachineOperand &Idx, unsigned InitReg, unsigned ResultReg, unsigned PhiReg, unsigned InitSaveExecReg, int Offset, bool UseGPRIdxMode, Register &SGPRIdxReg) { … } // This has slightly sub-optimal regalloc when the source vector is killed by // the read. The register allocator does not understand that the kill is // per-workitem, so is kept alive for the whole loop so we end up not re-using a // subregister from it, using 1 more VGPR than necessary. This was saved when // this was expanded after register allocation. static MachineBasicBlock::iterator loadM0FromVGPR(const SIInstrInfo *TII, MachineBasicBlock &MBB, MachineInstr &MI, unsigned InitResultReg, unsigned PhiReg, int Offset, bool UseGPRIdxMode, Register &SGPRIdxReg) { … } // Returns subreg index, offset static std::pair<unsigned, int> computeIndirectRegAndOffset(const SIRegisterInfo &TRI, const TargetRegisterClass *SuperRC, unsigned VecReg, int Offset) { … } static void setM0ToIndexFromSGPR(const SIInstrInfo *TII, MachineRegisterInfo &MRI, MachineInstr &MI, int Offset) { … } static Register getIndirectSGPRIdx(const SIInstrInfo *TII, MachineRegisterInfo &MRI, MachineInstr &MI, int Offset) { … } static MachineBasicBlock *emitIndirectSrc(MachineInstr &MI, MachineBasicBlock &MBB, const GCNSubtarget &ST) { … } static MachineBasicBlock *emitIndirectDst(MachineInstr &MI, MachineBasicBlock &MBB, const GCNSubtarget &ST) { … } static MachineBasicBlock *lowerWaveReduce(MachineInstr &MI, MachineBasicBlock &BB, const GCNSubtarget &ST, unsigned Opc) { … } MachineBasicBlock *SITargetLowering::EmitInstrWithCustomInserter( MachineInstr &MI, MachineBasicBlock *BB) const { … } bool SITargetLowering::enableAggressiveFMAFusion(EVT VT) const { … } bool SITargetLowering::enableAggressiveFMAFusion(LLT Ty) const { … } EVT SITargetLowering::getSetCCResultType(const DataLayout &DL, LLVMContext &Ctx, EVT VT) const { … } MVT SITargetLowering::getScalarShiftAmountTy(const DataLayout &, EVT VT) const { … } LLT SITargetLowering::getPreferredShiftAmountTy(LLT Ty) const { … } // Answering this is somewhat tricky and depends on the specific device which // have different rates for fma or all f64 operations. // // v_fma_f64 and v_mul_f64 always take the same number of cycles as each other // regardless of which device (although the number of cycles differs between // devices), so it is always profitable for f64. // // v_fma_f32 takes 4 or 16 cycles depending on the device, so it is profitable // only on full rate devices. Normally, we should prefer selecting v_mad_f32 // which we can always do even without fused FP ops since it returns the same // result as the separate operations and since it is always full // rate. Therefore, we lie and report that it is not faster for f32. v_mad_f32 // however does not support denormals, so we do report fma as faster if we have // a fast fma device and require denormals. // bool SITargetLowering::isFMAFasterThanFMulAndFAdd(const MachineFunction &MF, EVT VT) const { … } bool SITargetLowering::isFMAFasterThanFMulAndFAdd(const MachineFunction &MF, LLT Ty) const { … } bool SITargetLowering::isFMADLegal(const MachineInstr &MI, LLT Ty) const { … } bool SITargetLowering::isFMADLegal(const SelectionDAG &DAG, const SDNode *N) const { … } //===----------------------------------------------------------------------===// // Custom DAG Lowering Operations //===----------------------------------------------------------------------===// // Work around LegalizeDAG doing the wrong thing and fully scalarizing if the // wider vector type is legal. SDValue SITargetLowering::splitUnaryVectorOp(SDValue Op, SelectionDAG &DAG) const { … } // Work around LegalizeDAG doing the wrong thing and fully scalarizing if the // wider vector type is legal. SDValue SITargetLowering::splitBinaryVectorOp(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::splitTernaryVectorOp(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const { … } // Used for D16: Casts the result of an instruction into the right vector, // packs values if loads return unpacked values. static SDValue adjustLoadValueTypeImpl(SDValue Result, EVT LoadVT, const SDLoc &DL, SelectionDAG &DAG, bool Unpacked) { … } SDValue SITargetLowering::adjustLoadValueType(unsigned Opcode, MemSDNode *M, SelectionDAG &DAG, ArrayRef<SDValue> Ops, bool IsIntrinsic) const { … } SDValue SITargetLowering::lowerIntrinsicLoad(MemSDNode *M, bool IsFormat, SelectionDAG &DAG, ArrayRef<SDValue> Ops) const { … } static SDValue lowerICMPIntrinsic(const SITargetLowering &TLI, SDNode *N, SelectionDAG &DAG) { … } static SDValue lowerFCMPIntrinsic(const SITargetLowering &TLI, SDNode *N, SelectionDAG &DAG) { … } static SDValue lowerBALLOTIntrinsic(const SITargetLowering &TLI, SDNode *N, SelectionDAG &DAG) { … } static SDValue lowerLaneOp(const SITargetLowering &TLI, SDNode *N, SelectionDAG &DAG) { … } void SITargetLowering::ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue> &Results, SelectionDAG &DAG) const { … } /// Helper function for LowerBRCOND static SDNode *findUser(SDValue Value, unsigned Opcode) { … } unsigned SITargetLowering::isCFIntrinsic(const SDNode *Intr) const { … } bool SITargetLowering::shouldEmitFixup(const GlobalValue *GV) const { … } bool SITargetLowering::shouldEmitGOTReloc(const GlobalValue *GV) const { … } bool SITargetLowering::shouldEmitPCReloc(const GlobalValue *GV) const { … } bool SITargetLowering::shouldUseLDSConstAddress(const GlobalValue *GV) const { … } /// This transforms the control flow intrinsics to get the branch destination as /// last parameter, also switches branch target with BR if the need arise SDValue SITargetLowering::LowerBRCOND(SDValue BRCOND, SelectionDAG &DAG) const { … } SDValue SITargetLowering::LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::getFPExtOrFPRound(SelectionDAG &DAG, SDValue Op, const SDLoc &DL, EVT VT) const { … } SDValue SITargetLowering::lowerFP_ROUND(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerFMINNUM_FMAXNUM(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerFLDEXP(SDValue Op, SelectionDAG &DAG) const { … } static unsigned getExtOpcodeForPromotedOp(SDValue Op) { … } SDValue SITargetLowering::promoteUniformOpToI32(SDValue Op, DAGCombinerInfo &DCI) const { … } // Custom lowering for vector multiplications and s_mul_u64. SDValue SITargetLowering::lowerMUL(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerXMULO(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerXMUL_LOHI(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerTRAP(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerTrapEndpgm( SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::loadImplicitKernelArgument(SelectionDAG &DAG, MVT VT, const SDLoc &DL, Align Alignment, ImplicitParameter Param) const { … } SDValue SITargetLowering::lowerTrapHsaQueuePtr( SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerTrapHsa( SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerDEBUGTRAP(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::getSegmentAperture(unsigned AS, const SDLoc &DL, SelectionDAG &DAG) const { … } /// Return true if the value is a known valid address, such that a null check is /// not necessary. static bool isKnownNonNull(SDValue Val, SelectionDAG &DAG, const AMDGPUTargetMachine &TM, unsigned AddrSpace) { … } SDValue SITargetLowering::lowerADDRSPACECAST(SDValue Op, SelectionDAG &DAG) const { … } // This lowers an INSERT_SUBVECTOR by extracting the individual elements from // the small vector and inserting them into the big vector. That is better than // the default expansion of doing it via a stack slot. Even though the use of // the stack slot would be optimized away afterwards, the stack slot itself // remains. SDValue SITargetLowering::lowerINSERT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const { … } static bool elementPairIsContiguous(ArrayRef<int> Mask, int Elt) { … } SDValue SITargetLowering::lowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const { … } bool SITargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const { … } static SDValue buildPCRelGlobalAddress(SelectionDAG &DAG, const GlobalValue *GV, const SDLoc &DL, int64_t Offset, EVT PtrVT, unsigned GAFlags = SIInstrInfo::MO_NONE) { … } SDValue SITargetLowering::LowerGlobalAddress(AMDGPUMachineFunction *MFI, SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::copyToM0(SelectionDAG &DAG, SDValue Chain, const SDLoc &DL, SDValue V) const { … } SDValue SITargetLowering::lowerImplicitZextParam(SelectionDAG &DAG, SDValue Op, MVT VT, unsigned Offset) const { … } static SDValue emitNonHSAIntrinsicError(SelectionDAG &DAG, const SDLoc &DL, EVT VT) { … } static SDValue emitRemovedIntrinsicError(SelectionDAG &DAG, const SDLoc &DL, EVT VT) { … } static SDValue getBuildDwordsVector(SelectionDAG &DAG, SDLoc DL, ArrayRef<SDValue> Elts) { … } static SDValue padEltsToUndef(SelectionDAG &DAG, const SDLoc &DL, EVT CastVT, SDValue Src, int ExtraElts) { … } // Re-construct the required return value for a image load intrinsic. // This is more complicated due to the optional use TexFailCtrl which means the required // return type is an aggregate static SDValue constructRetValue(SelectionDAG &DAG, MachineSDNode *Result, ArrayRef<EVT> ResultTypes, bool IsTexFail, bool Unpacked, bool IsD16, int DMaskPop, int NumVDataDwords, bool IsAtomicPacked16Bit, const SDLoc &DL) { … } static bool parseTexFail(SDValue TexFailCtrl, SelectionDAG &DAG, SDValue *TFE, SDValue *LWE, bool &IsTexFail) { … } static void packImage16bitOpsToDwords(SelectionDAG &DAG, SDValue Op, MVT PackVectorVT, SmallVectorImpl<SDValue> &PackedAddrs, unsigned DimIdx, unsigned EndIdx, unsigned NumGradients) { … } SDValue SITargetLowering::lowerImage(SDValue Op, const AMDGPU::ImageDimIntrinsicInfo *Intr, SelectionDAG &DAG, bool WithChain) const { … } SDValue SITargetLowering::lowerSBuffer(EVT VT, SDLoc DL, SDValue Rsrc, SDValue Offset, SDValue CachePolicy, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerWaveID(SelectionDAG &DAG, SDValue Op) const { … } SDValue SITargetLowering::lowerWorkitemID(SelectionDAG &DAG, SDValue Op, unsigned Dim, const ArgDescriptor &Arg) const { … } SDValue SITargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const { … } // On targets not supporting constant in soffset field, turn zero to // SGPR_NULL to avoid generating an extra s_mov with zero. static SDValue selectSOffset(SDValue SOffset, SelectionDAG &DAG, const GCNSubtarget *Subtarget) { … } SDValue SITargetLowering::lowerRawBufferAtomicIntrin(SDValue Op, SelectionDAG &DAG, unsigned NewOpcode) const { … } SDValue SITargetLowering::lowerStructBufferAtomicIntrin(SDValue Op, SelectionDAG &DAG, unsigned NewOpcode) const { … } SDValue SITargetLowering::LowerINTRINSIC_W_CHAIN(SDValue Op, SelectionDAG &DAG) const { … } // Call DAG.getMemIntrinsicNode for a load, but first widen a dwordx3 type to // dwordx4 if on SI and handle TFE loads. SDValue SITargetLowering::getMemIntrinsicNode(unsigned Opcode, const SDLoc &DL, SDVTList VTList, ArrayRef<SDValue> Ops, EVT MemVT, MachineMemOperand *MMO, SelectionDAG &DAG) const { … } SDValue SITargetLowering::handleD16VData(SDValue VData, SelectionDAG &DAG, bool ImageStore) const { … } SDValue SITargetLowering::LowerINTRINSIC_VOID(SDValue Op, SelectionDAG &DAG) const { … } // The raw.(t)buffer and struct.(t)buffer intrinsics have two offset args: // offset (the offset that is included in bounds checking and swizzling, to be // split between the instruction's voffset and immoffset fields) and soffset // (the offset that is excluded from bounds checking and swizzling, to go in // the instruction's soffset field). This function takes the first kind of // offset and figures out how to split it between voffset and immoffset. std::pair<SDValue, SDValue> SITargetLowering::splitBufferOffsets( SDValue Offset, SelectionDAG &DAG) const { … } // Analyze a combined offset from an amdgcn_s_buffer_load intrinsic and store // the three offsets (voffset, soffset and instoffset) into the SDValue[3] array // pointed to by Offsets. void SITargetLowering::setBufferOffsets(SDValue CombinedOffset, SelectionDAG &DAG, SDValue *Offsets, Align Alignment) const { … } SDValue SITargetLowering::bufferRsrcPtrToVector(SDValue MaybePointer, SelectionDAG &DAG) const { … } // Wrap a global or flat pointer into a buffer intrinsic using the flags // specified in the intrinsic. SDValue SITargetLowering::lowerPointerAsRsrcIntrin(SDNode *Op, SelectionDAG &DAG) const { … } // Handle 8 bit and 16 bit buffer loads SDValue SITargetLowering::handleByteShortBufferLoads(SelectionDAG &DAG, EVT LoadVT, SDLoc DL, ArrayRef<SDValue> Ops, MachineMemOperand *MMO, bool IsTFE) const { … } // Handle 8 bit and 16 bit buffer stores SDValue SITargetLowering::handleByteShortBufferStores(SelectionDAG &DAG, EVT VDataType, SDLoc DL, SDValue Ops[], MemSDNode *M) const { … } static SDValue getLoadExtOrTrunc(SelectionDAG &DAG, ISD::LoadExtType ExtType, SDValue Op, const SDLoc &SL, EVT VT) { … } // Try to turn 8 and 16-bit scalar loads into SMEM eligible 32-bit loads. // TODO: Skip this on GFX12 which does have scalar sub-dword loads. SDValue SITargetLowering::widenLoad(LoadSDNode *Ld, DAGCombinerInfo &DCI) const { … } static bool addressMayBeAccessedAsPrivate(const MachineMemOperand *MMO, const SIMachineFunctionInfo &Info) { … } SDValue SITargetLowering::LowerLOAD(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const { … } // Catch division cases where we can use shortcuts with rcp and rsq // instructions. SDValue SITargetLowering::lowerFastUnsafeFDIV(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerFastUnsafeFDIV64(SDValue Op, SelectionDAG &DAG) const { … } static SDValue getFPBinOp(SelectionDAG &DAG, unsigned Opcode, const SDLoc &SL, EVT VT, SDValue A, SDValue B, SDValue GlueChain, SDNodeFlags Flags) { … } static SDValue getFPTernOp(SelectionDAG &DAG, unsigned Opcode, const SDLoc &SL, EVT VT, SDValue A, SDValue B, SDValue C, SDValue GlueChain, SDNodeFlags Flags) { … } SDValue SITargetLowering::LowerFDIV16(SDValue Op, SelectionDAG &DAG) const { … } // Faster 2.5 ULP division that does not support denormals. SDValue SITargetLowering::lowerFDIV_FAST(SDValue Op, SelectionDAG &DAG) const { … } // Returns immediate value for setting the F32 denorm mode when using the // S_DENORM_MODE instruction. static SDValue getSPDenormModeValue(uint32_t SPDenormMode, SelectionDAG &DAG, const SIMachineFunctionInfo *Info, const GCNSubtarget *ST) { … } SDValue SITargetLowering::LowerFDIV32(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::LowerFDIV64(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::LowerFDIV(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::LowerFFREXP(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::LowerSTORE(SDValue Op, SelectionDAG &DAG) const { … } // Avoid the full correct expansion for f32 sqrt when promoting from f16. SDValue SITargetLowering::lowerFSQRTF16(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerFSQRTF32(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::lowerFSQRTF64(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::LowerTrig(SDValue Op, SelectionDAG &DAG) const { … } SDValue SITargetLowering::LowerATOMIC_CMP_SWAP(SDValue Op, SelectionDAG &DAG) const { … } //===----------------------------------------------------------------------===// // Custom DAG optimizations //===----------------------------------------------------------------------===// SDValue SITargetLowering::performUCharToFloatCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } SDValue SITargetLowering::performFCopySignCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } // (shl (add x, c1), c2) -> add (shl x, c2), (shl c1, c2) // (shl (or x, c1), c2) -> add (shl x, c2), (shl c1, c2) iff x and c1 share no // bits // This is a variant of // (mul (add x, c1), c2) -> add (mul x, c2), (mul c1, c2), // // The normal DAG combiner will do this, but only if the add has one use since // that would increase the number of instructions. // // This prevents us from seeing a constant offset that can be folded into a // memory instruction's addressing mode. If we know the resulting add offset of // a pointer can be folded into an addressing offset, we can replace the pointer // operand with the add of new constant offset. This eliminates one of the uses, // and may allow the remaining use to also be simplified. // SDValue SITargetLowering::performSHLPtrCombine(SDNode *N, unsigned AddrSpace, EVT MemVT, DAGCombinerInfo &DCI) const { … } /// MemSDNode::getBasePtr() does not work for intrinsics, which needs to offset /// by the chain and intrinsic ID. Theoretically we would also need to check the /// specific intrinsic, but they all place the pointer operand first. static unsigned getBasePtrIndex(const MemSDNode *N) { … } SDValue SITargetLowering::performMemSDNodeCombine(MemSDNode *N, DAGCombinerInfo &DCI) const { … } static bool bitOpWithConstantIsReducible(unsigned Opc, uint32_t Val) { … } // Break up 64-bit bit operation of a constant into two 32-bit and/or/xor. This // will typically happen anyway for a VALU 64-bit and. This exposes other 32-bit // integer combine opportunities since most 64-bit operations are decomposed // this way. TODO: We won't want this for SALU especially if it is an inline // immediate. SDValue SITargetLowering::splitBinaryBitConstantOp( DAGCombinerInfo &DCI, const SDLoc &SL, unsigned Opc, SDValue LHS, const ConstantSDNode *CRHS) const { … } bool llvm::isBoolSGPR(SDValue V) { … } // If a constant has all zeroes or all ones within each byte return it. // Otherwise return 0. static uint32_t getConstantPermuteMask(uint32_t C) { … } // Check if a node selects whole bytes from its operand 0 starting at a byte // boundary while masking the rest. Returns select mask as in the v_perm_b32 // or -1 if not succeeded. // Note byte select encoding: // value 0-3 selects corresponding source byte; // value 0xc selects zero; // value 0xff selects 0xff. static uint32_t getPermuteMask(SDValue V) { … } SDValue SITargetLowering::performAndCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } // A key component of v_perm is a mapping between byte position of the src // operands, and the byte position of the dest. To provide such, we need: 1. the // node that provides x byte of the dest of the OR, and 2. the byte of the node // used to provide that x byte. calculateByteProvider finds which node provides // a certain byte of the dest of the OR, and calculateSrcByte takes that node, // and finds an ultimate src and byte position For example: The supported // LoadCombine pattern for vector loads is as follows // t1 // or // / \ // t2 t3 // zext shl // | | \ // t4 t5 16 // or anyext // / \ | // t6 t7 t8 // srl shl or // / | / \ / \ // t9 t10 t11 t12 t13 t14 // trunc* 8 trunc* 8 and and // | | / | | \ // t15 t16 t17 t18 t19 t20 // trunc* 255 srl -256 // | / \ // t15 t15 16 // // *In this example, the truncs are from i32->i16 // // calculateByteProvider would find t6, t7, t13, and t14 for bytes 0-3 // respectively. calculateSrcByte would find (given node) -> ultimate src & // byteposition: t6 -> t15 & 1, t7 -> t16 & 0, t13 -> t15 & 0, t14 -> t15 & 3. // After finding the mapping, we can combine the tree into vperm t15, t16, // 0x05000407 // Find the source and byte position from a node. // \p DestByte is the byte position of the dest of the or that the src // ultimately provides. \p SrcIndex is the byte of the src that maps to this // dest of the or byte. \p Depth tracks how many recursive iterations we have // performed. static const std::optional<ByteProvider<SDValue>> calculateSrcByte(const SDValue Op, uint64_t DestByte, uint64_t SrcIndex = 0, unsigned Depth = 0) { … } // For a byte position in the result of an Or, traverse the tree and find the // node (and the byte of the node) which ultimately provides this {Or, // BytePosition}. \p Op is the operand we are currently examining. \p Index is // the byte position of the Op that corresponds with the originally requested // byte of the Or \p Depth tracks how many recursive iterations we have // performed. \p StartingIndex is the originally requested byte of the Or static const std::optional<ByteProvider<SDValue>> calculateByteProvider(const SDValue &Op, unsigned Index, unsigned Depth, unsigned StartingIndex = 0) { … } // Returns true if the Operand is a scalar and is 16 bits static bool isExtendedFrom16Bits(SDValue &Operand) { … } // Returns true if the mask matches consecutive bytes, and the first byte // begins at a power of 2 byte offset from 0th byte static bool addresses16Bits(int Mask) { … } // Do not lower into v_perm if the operands are actually 16 bit // and the selected bits (based on PermMask) correspond with two // easily addressable 16 bit operands. static bool hasNon16BitAccesses(uint64_t PermMask, SDValue &Op, SDValue &OtherOp) { … } static SDValue getDWordFromOffset(SelectionDAG &DAG, SDLoc SL, SDValue Src, unsigned DWordOffset) { … } static SDValue matchPERM(SDNode *N, TargetLowering::DAGCombinerInfo &DCI) { … } SDValue SITargetLowering::performOrCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } SDValue SITargetLowering::performXorCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } SDValue SITargetLowering::performZeroExtendCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } SDValue SITargetLowering::performSignExtendInRegCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } SDValue SITargetLowering::performClassCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } SDValue SITargetLowering::performRcpCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } bool SITargetLowering::isCanonicalized(SelectionDAG &DAG, SDValue Op, unsigned MaxDepth) const { … } bool SITargetLowering::isCanonicalized(Register Reg, const MachineFunction &MF, unsigned MaxDepth) const { … } // Constant fold canonicalize. SDValue SITargetLowering::getCanonicalConstantFP( SelectionDAG &DAG, const SDLoc &SL, EVT VT, const APFloat &C) const { … } static bool vectorEltWillFoldAway(SDValue Op) { … } SDValue SITargetLowering::performFCanonicalizeCombine( SDNode *N, DAGCombinerInfo &DCI) const { … } static unsigned minMaxOpcToMin3Max3Opc(unsigned Opc) { … } SDValue SITargetLowering::performIntMed3ImmCombine(SelectionDAG &DAG, const SDLoc &SL, SDValue Src, SDValue MinVal, SDValue MaxVal, bool Signed) const { … } static ConstantFPSDNode *getSplatConstantFP(SDValue Op) { … } SDValue SITargetLowering::performFPMed3ImmCombine(SelectionDAG &DAG, const SDLoc &SL, SDValue Op0, SDValue Op1) const { … } /// \return true if the subtarget supports minimum3 and maximum3 with the given /// base min/max opcode \p Opc for type \p VT. static bool supportsMin3Max3(const GCNSubtarget &Subtarget, unsigned Opc, EVT VT) { … } SDValue SITargetLowering::performMinMaxCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } static bool isClampZeroToOne(SDValue A, SDValue B) { … } // FIXME: Should only worry about snans for version with chain. SDValue SITargetLowering::performFMed3Combine(SDNode *N, DAGCombinerInfo &DCI) const { … } SDValue SITargetLowering::performCvtPkRTZCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } // Check if EXTRACT_VECTOR_ELT/INSERT_VECTOR_ELT (<n x e>, var-idx) should be // expanded into a set of cmp/select instructions. bool SITargetLowering::shouldExpandVectorDynExt(unsigned EltSize, unsigned NumElem, bool IsDivergentIdx, const GCNSubtarget *Subtarget) { … } bool SITargetLowering::shouldExpandVectorDynExt(SDNode *N) const { … } SDValue SITargetLowering::performExtractVectorEltCombine( SDNode *N, DAGCombinerInfo &DCI) const { … } SDValue SITargetLowering::performInsertVectorEltCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } /// Return the source of an fp_extend from f16 to f32, or a converted FP /// constant. static SDValue strictFPExtFromF16(SelectionDAG &DAG, SDValue Src) { … } SDValue SITargetLowering::performFPRoundCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } unsigned SITargetLowering::getFusedOpcode(const SelectionDAG &DAG, const SDNode *N0, const SDNode *N1) const { … } // For a reassociatable opcode perform: // op x, (op y, z) -> op (op x, z), y, if x and z are uniform SDValue SITargetLowering::reassociateScalarOps(SDNode *N, SelectionDAG &DAG) const { … } static SDValue getMad64_32(SelectionDAG &DAG, const SDLoc &SL, EVT VT, SDValue N0, SDValue N1, SDValue N2, bool Signed) { … } // Fold (add (mul x, y), z) --> (mad_[iu]64_[iu]32 x, y, z) plus high // multiplies, if any. // // Full 64-bit multiplies that feed into an addition are lowered here instead // of using the generic expansion. The generic expansion ends up with // a tree of ADD nodes that prevents us from using the "add" part of the // MAD instruction. The expansion produced here results in a chain of ADDs // instead of a tree. SDValue SITargetLowering::tryFoldToMad64_32(SDNode *N, DAGCombinerInfo &DCI) const { … } // Collect the ultimate src of each of the mul node's operands, and confirm // each operand is 8 bytes. static std::optional<ByteProvider<SDValue>> handleMulOperand(const SDValue &MulOperand) { … } static unsigned addPermMasks(unsigned First, unsigned Second) { … } struct DotSrc { … }; static void placeSources(ByteProvider<SDValue> &Src0, ByteProvider<SDValue> &Src1, SmallVectorImpl<DotSrc> &Src0s, SmallVectorImpl<DotSrc> &Src1s, int Step) { … } static SDValue resolveSources(SelectionDAG &DAG, SDLoc SL, SmallVectorImpl<DotSrc> &Srcs, bool IsSigned, bool IsAny) { … } static void fixMasks(SmallVectorImpl<DotSrc> &Srcs, unsigned ChainLength) { … } static bool isMul(const SDValue Op) { … } static std::optional<bool> checkDot4MulSignedness(const SDValue &N, ByteProvider<SDValue> &Src0, ByteProvider<SDValue> &Src1, const SDValue &S0Op, const SDValue &S1Op, const SelectionDAG &DAG) { … } SDValue SITargetLowering::performAddCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } SDValue SITargetLowering::performSubCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } SDValue SITargetLowering::performAddCarrySubCarryCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } SDValue SITargetLowering::performFAddCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } SDValue SITargetLowering::performFSubCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } SDValue SITargetLowering::performFDivCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } SDValue SITargetLowering::performFMACombine(SDNode *N, DAGCombinerInfo &DCI) const { … } SDValue SITargetLowering::performSetCCCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } SDValue SITargetLowering::performCvtF32UByteNCombine(SDNode *N, DAGCombinerInfo &DCI) const { … } SDValue SITargetLowering::performClampCombine(SDNode *N, DAGCombinerInfo &DCI) const { … }SDValue SITargetLowering::PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const { … }static unsigned SubIdx2Lane(unsigned Idx) { … }SDNode *SITargetLowering::adjustWritemask(MachineSDNode *&Node, SelectionDAG &DAG) const { … }static bool isFrameIndexOp(SDValue Op) { … }SDNode *SITargetLowering::legalizeTargetIndependentNode(SDNode *Node, SelectionDAG &DAG) const { … }SDNode *SITargetLowering::PostISelFolding(MachineSDNode *Node, SelectionDAG &DAG) const { … }void SITargetLowering::AddMemOpInit(MachineInstr &MI) const { … }void SITargetLowering::AdjustInstrPostInstrSelection(MachineInstr &MI, SDNode *Node) const { … }static SDValue buildSMovImm32(SelectionDAG &DAG, const SDLoc &DL, uint64_t Val) { … }MachineSDNode *SITargetLowering::wrapAddr64Rsrc(SelectionDAG &DAG, const SDLoc &DL, SDValue Ptr) const { … }MachineSDNode *SITargetLowering::buildRSRC(SelectionDAG &DAG, const SDLoc &DL, SDValue Ptr, uint32_t RsrcDword1, uint64_t RsrcDword2And3) const { … }std::pair<unsigned, const TargetRegisterClass *> SITargetLowering::getRegForInlineAsmConstraint(const TargetRegisterInfo *TRI_, StringRef Constraint, MVT VT) const { … }static bool isImmConstraint(StringRef Constraint) { … }SITargetLowering::ConstraintType SITargetLowering::getConstraintType(StringRef Constraint) const { … }static uint64_t clearUnusedBits(uint64_t Val, unsigned Size) { … }void SITargetLowering::LowerAsmOperandForConstraint(SDValue Op, StringRef Constraint, std::vector<SDValue> &Ops, SelectionDAG &DAG) const { … }bool SITargetLowering::getAsmOperandConstVal(SDValue Op, uint64_t &Val) const { … }bool SITargetLowering::checkAsmConstraintVal(SDValue Op, StringRef Constraint, uint64_t Val) const { … }bool SITargetLowering::checkAsmConstraintValA(SDValue Op, uint64_t Val, unsigned MaxSize) const { … }static int getAlignedAGPRClassID(unsigned UnalignedClassID) { … }void SITargetLowering::finalizeLowering(MachineFunction &MF) const { … }void SITargetLowering::computeKnownBitsForTargetNode(const SDValue Op, KnownBits &Known, const APInt &DemandedElts, const SelectionDAG &DAG, unsigned Depth) const { … }void SITargetLowering::computeKnownBitsForFrameIndex( const int FI, KnownBits &Known, const MachineFunction &MF) const { … }static void knownBitsForWorkitemID(const GCNSubtarget &ST, GISelKnownBits &KB, KnownBits &Known, unsigned Dim) { … }void SITargetLowering::computeKnownBitsForTargetInstr( GISelKnownBits &KB, Register R, KnownBits &Known, const APInt &DemandedElts, const MachineRegisterInfo &MRI, unsigned Depth) const { … }Align SITargetLowering::computeKnownAlignForTargetInstr( GISelKnownBits &KB, Register R, const MachineRegisterInfo &MRI, unsigned Depth) const { … }Align SITargetLowering::getPrefLoopAlignment(MachineLoop *ML) const { … }LLVM_ATTRIBUTE_UNUSED static bool isCopyFromRegOfInlineAsm(const SDNode *N) { … }bool SITargetLowering::isSDNodeSourceOfDivergence(const SDNode *N, FunctionLoweringInfo *FLI, UniformityInfo *UA) const { … }bool SITargetLowering::denormalsEnabledForType(const SelectionDAG &DAG, EVT VT) const { … }bool SITargetLowering::denormalsEnabledForType( LLT Ty, const MachineFunction &MF) const { … }bool SITargetLowering::isKnownNeverNaNForTargetNode(SDValue Op, const SelectionDAG &DAG, bool SNaN, unsigned Depth) const { … }static bool atomicIgnoresDenormalModeOrFPModeIsFTZ(const AtomicRMWInst *RMW) { … }static OptimizationRemark emitAtomicRMWLegalRemark(const AtomicRMWInst *RMW) { … }static bool isV2F16OrV2BF16(Type *Ty) { … }static bool isV2F16(Type *Ty) { … }static bool isV2BF16(Type *Ty) { … }static bool isAtomicRMWLegalIntTy(Type *Ty) { … }static bool isAtomicRMWLegalXChgTy(const AtomicRMWInst *RMW) { … }static bool globalMemoryFPAtomicIsLegal(const GCNSubtarget &Subtarget, const AtomicRMWInst *RMW, bool HasSystemScope) { … }static TargetLowering::AtomicExpansionKind atomicSupportedIfLegalIntType(const AtomicRMWInst *RMW) { … }TargetLowering::AtomicExpansionKind SITargetLowering::shouldExpandAtomicRMWInIR(AtomicRMWInst *RMW) const { … }TargetLowering::AtomicExpansionKind SITargetLowering::shouldExpandAtomicLoadInIR(LoadInst *LI) const { … }TargetLowering::AtomicExpansionKind SITargetLowering::shouldExpandAtomicStoreInIR(StoreInst *SI) const { … }TargetLowering::AtomicExpansionKind SITargetLowering::shouldExpandAtomicCmpXchgInIR(AtomicCmpXchgInst *CmpX) const { … }const TargetRegisterClass * SITargetLowering::getRegClassFor(MVT VT, bool isDivergent) const { … }static bool hasCFUser(const Value *V, SmallPtrSet<const Value *, 16> &Visited, unsigned WaveSize) { … }bool SITargetLowering::requiresUniformRegister(MachineFunction &MF, const Value *V) const { … }bool SITargetLowering::hasMemSDNodeUser(SDNode *N) const { … }bool SITargetLowering::isReassocProfitable(SelectionDAG &DAG, SDValue N0, SDValue N1) const { … }bool SITargetLowering::isReassocProfitable(MachineRegisterInfo &MRI, Register N0, Register N1) const { … }MachineMemOperand::Flags SITargetLowering::getTargetMMOFlags(const Instruction &I) const { … }bool SITargetLowering::checkForPhysRegDependency( SDNode *Def, SDNode *User, unsigned Op, const TargetRegisterInfo *TRI, const TargetInstrInfo *TII, unsigned &PhysReg, int &Cost) const { … }void SITargetLowering::emitExpandAtomicRMW(AtomicRMWInst *AI) const { … }LoadInst * SITargetLowering::lowerIdempotentRMWIntoFencedLoad(AtomicRMWInst *AI) const { … }
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