| //===- SPIRVInstructionSelector.cpp ------------------------------*- C++ -*-==// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements the targeting of the InstructionSelector class for |
| // SPIRV. |
| // TODO: This should be generated by TableGen. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "SPIRV.h" |
| #include "SPIRVGlobalRegistry.h" |
| #include "SPIRVInstrInfo.h" |
| #include "SPIRVRegisterBankInfo.h" |
| #include "SPIRVRegisterInfo.h" |
| #include "SPIRVTargetMachine.h" |
| #include "SPIRVUtils.h" |
| #include "llvm/ADT/APFloat.h" |
| #include "llvm/CodeGen/GlobalISel/InstructionSelector.h" |
| #include "llvm/CodeGen/GlobalISel/InstructionSelectorImpl.h" |
| #include "llvm/CodeGen/MachineInstrBuilder.h" |
| #include "llvm/CodeGen/MachineRegisterInfo.h" |
| #include "llvm/IR/IntrinsicsSPIRV.h" |
| #include "llvm/Support/Debug.h" |
| |
| #define DEBUG_TYPE "spirv-isel" |
| |
| using namespace llvm; |
| namespace CL = SPIRV::OpenCLExtInst; |
| namespace GL = SPIRV::GLSLExtInst; |
| |
| using ExtInstList = |
| std::vector<std::pair<SPIRV::InstructionSet::InstructionSet, uint32_t>>; |
| |
| namespace { |
| |
| #define GET_GLOBALISEL_PREDICATE_BITSET |
| #include "SPIRVGenGlobalISel.inc" |
| #undef GET_GLOBALISEL_PREDICATE_BITSET |
| |
| class SPIRVInstructionSelector : public InstructionSelector { |
| const SPIRVSubtarget &STI; |
| const SPIRVInstrInfo &TII; |
| const SPIRVRegisterInfo &TRI; |
| const RegisterBankInfo &RBI; |
| SPIRVGlobalRegistry &GR; |
| MachineRegisterInfo *MRI; |
| |
| public: |
| SPIRVInstructionSelector(const SPIRVTargetMachine &TM, |
| const SPIRVSubtarget &ST, |
| const RegisterBankInfo &RBI); |
| void setupMF(MachineFunction &MF, GISelKnownBits *KB, |
| CodeGenCoverage &CoverageInfo, ProfileSummaryInfo *PSI, |
| BlockFrequencyInfo *BFI) override; |
| // Common selection code. Instruction-specific selection occurs in spvSelect. |
| bool select(MachineInstr &I) override; |
| static const char *getName() { return DEBUG_TYPE; } |
| |
| #define GET_GLOBALISEL_PREDICATES_DECL |
| #include "SPIRVGenGlobalISel.inc" |
| #undef GET_GLOBALISEL_PREDICATES_DECL |
| |
| #define GET_GLOBALISEL_TEMPORARIES_DECL |
| #include "SPIRVGenGlobalISel.inc" |
| #undef GET_GLOBALISEL_TEMPORARIES_DECL |
| |
| private: |
| // tblgen-erated 'select' implementation, used as the initial selector for |
| // the patterns that don't require complex C++. |
| bool selectImpl(MachineInstr &I, CodeGenCoverage &CoverageInfo) const; |
| |
| // All instruction-specific selection that didn't happen in "select()". |
| // Is basically a large Switch/Case delegating to all other select method. |
| bool spvSelect(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| |
| bool selectGlobalValue(Register ResVReg, MachineInstr &I, |
| const MachineInstr *Init = nullptr) const; |
| |
| bool selectUnOpWithSrc(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I, Register SrcReg, |
| unsigned Opcode) const; |
| bool selectUnOp(Register ResVReg, const SPIRVType *ResType, MachineInstr &I, |
| unsigned Opcode) const; |
| |
| bool selectLoad(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| bool selectStore(MachineInstr &I) const; |
| |
| bool selectMemOperation(Register ResVReg, MachineInstr &I) const; |
| |
| bool selectAtomicRMW(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I, unsigned NewOpcode) const; |
| |
| bool selectAtomicCmpXchg(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| |
| bool selectFence(MachineInstr &I) const; |
| |
| bool selectAddrSpaceCast(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| |
| bool selectBitreverse(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| |
| bool selectConstVector(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| |
| bool selectCmp(Register ResVReg, const SPIRVType *ResType, |
| unsigned comparisonOpcode, MachineInstr &I) const; |
| |
| bool selectICmp(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| bool selectFCmp(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| |
| void renderImm32(MachineInstrBuilder &MIB, const MachineInstr &I, |
| int OpIdx) const; |
| void renderFImm32(MachineInstrBuilder &MIB, const MachineInstr &I, |
| int OpIdx) const; |
| |
| bool selectConst(Register ResVReg, const SPIRVType *ResType, const APInt &Imm, |
| MachineInstr &I) const; |
| |
| bool selectSelect(Register ResVReg, const SPIRVType *ResType, MachineInstr &I, |
| bool IsSigned) const; |
| bool selectIToF(Register ResVReg, const SPIRVType *ResType, MachineInstr &I, |
| bool IsSigned, unsigned Opcode) const; |
| bool selectExt(Register ResVReg, const SPIRVType *ResType, MachineInstr &I, |
| bool IsSigned) const; |
| |
| bool selectTrunc(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| |
| bool selectIntToBool(Register IntReg, Register ResVReg, MachineInstr &I, |
| const SPIRVType *intTy, const SPIRVType *boolTy) const; |
| |
| bool selectOpUndef(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| bool selectIntrinsic(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| bool selectExtractVal(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| bool selectInsertVal(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| bool selectExtractElt(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| bool selectInsertElt(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| bool selectGEP(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| |
| bool selectFrameIndex(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| |
| bool selectBranch(MachineInstr &I) const; |
| bool selectBranchCond(MachineInstr &I) const; |
| |
| bool selectPhi(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| |
| bool selectExtInst(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I, CL::OpenCLExtInst CLInst) const; |
| bool selectExtInst(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I, CL::OpenCLExtInst CLInst, |
| GL::GLSLExtInst GLInst) const; |
| bool selectExtInst(Register ResVReg, const SPIRVType *ResType, |
| MachineInstr &I, const ExtInstList &ExtInsts) const; |
| |
| Register buildI32Constant(uint32_t Val, MachineInstr &I, |
| const SPIRVType *ResType = nullptr) const; |
| |
| Register buildZerosVal(const SPIRVType *ResType, MachineInstr &I) const; |
| Register buildOnesVal(bool AllOnes, const SPIRVType *ResType, |
| MachineInstr &I) const; |
| }; |
| |
| } // end anonymous namespace |
| |
| #define GET_GLOBALISEL_IMPL |
| #include "SPIRVGenGlobalISel.inc" |
| #undef GET_GLOBALISEL_IMPL |
| |
| SPIRVInstructionSelector::SPIRVInstructionSelector(const SPIRVTargetMachine &TM, |
| const SPIRVSubtarget &ST, |
| const RegisterBankInfo &RBI) |
| : InstructionSelector(), STI(ST), TII(*ST.getInstrInfo()), |
| TRI(*ST.getRegisterInfo()), RBI(RBI), GR(*ST.getSPIRVGlobalRegistry()), |
| #define GET_GLOBALISEL_PREDICATES_INIT |
| #include "SPIRVGenGlobalISel.inc" |
| #undef GET_GLOBALISEL_PREDICATES_INIT |
| #define GET_GLOBALISEL_TEMPORARIES_INIT |
| #include "SPIRVGenGlobalISel.inc" |
| #undef GET_GLOBALISEL_TEMPORARIES_INIT |
| { |
| } |
| |
| void SPIRVInstructionSelector::setupMF(MachineFunction &MF, GISelKnownBits *KB, |
| CodeGenCoverage &CoverageInfo, |
| ProfileSummaryInfo *PSI, |
| BlockFrequencyInfo *BFI) { |
| MRI = &MF.getRegInfo(); |
| GR.setCurrentFunc(MF); |
| InstructionSelector::setupMF(MF, KB, CoverageInfo, PSI, BFI); |
| } |
| |
| static bool isImm(const MachineOperand &MO, MachineRegisterInfo *MRI); |
| |
| // Defined in SPIRVLegalizerInfo.cpp. |
| extern bool isTypeFoldingSupported(unsigned Opcode); |
| |
| bool SPIRVInstructionSelector::select(MachineInstr &I) { |
| assert(I.getParent() && "Instruction should be in a basic block!"); |
| assert(I.getParent()->getParent() && "Instruction should be in a function!"); |
| |
| Register Opcode = I.getOpcode(); |
| // If it's not a GMIR instruction, we've selected it already. |
| if (!isPreISelGenericOpcode(Opcode)) { |
| if (Opcode == SPIRV::ASSIGN_TYPE) { // These pseudos aren't needed any more. |
| auto *Def = MRI->getVRegDef(I.getOperand(1).getReg()); |
| if (isTypeFoldingSupported(Def->getOpcode())) { |
| auto Res = selectImpl(I, *CoverageInfo); |
| assert(Res || Def->getOpcode() == TargetOpcode::G_CONSTANT); |
| if (Res) |
| return Res; |
| } |
| MRI->replaceRegWith(I.getOperand(1).getReg(), I.getOperand(0).getReg()); |
| I.removeFromParent(); |
| return true; |
| } else if (I.getNumDefs() == 1) { |
| // Make all vregs 32 bits (for SPIR-V IDs). |
| MRI->setType(I.getOperand(0).getReg(), LLT::scalar(32)); |
| } |
| return constrainSelectedInstRegOperands(I, TII, TRI, RBI); |
| } |
| |
| if (I.getNumOperands() != I.getNumExplicitOperands()) { |
| LLVM_DEBUG(errs() << "Generic instr has unexpected implicit operands\n"); |
| return false; |
| } |
| |
| // Common code for getting return reg+type, and removing selected instr |
| // from parent occurs here. Instr-specific selection happens in spvSelect(). |
| bool HasDefs = I.getNumDefs() > 0; |
| Register ResVReg = HasDefs ? I.getOperand(0).getReg() : Register(0); |
| SPIRVType *ResType = HasDefs ? GR.getSPIRVTypeForVReg(ResVReg) : nullptr; |
| assert(!HasDefs || ResType || I.getOpcode() == TargetOpcode::G_GLOBAL_VALUE); |
| if (spvSelect(ResVReg, ResType, I)) { |
| if (HasDefs) // Make all vregs 32 bits (for SPIR-V IDs). |
| MRI->setType(ResVReg, LLT::scalar(32)); |
| I.removeFromParent(); |
| return true; |
| } |
| return false; |
| } |
| |
| bool SPIRVInstructionSelector::spvSelect(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| assert(!isTypeFoldingSupported(I.getOpcode()) || |
| I.getOpcode() == TargetOpcode::G_CONSTANT); |
| const unsigned Opcode = I.getOpcode(); |
| switch (Opcode) { |
| case TargetOpcode::G_CONSTANT: |
| return selectConst(ResVReg, ResType, I.getOperand(1).getCImm()->getValue(), |
| I); |
| case TargetOpcode::G_GLOBAL_VALUE: |
| return selectGlobalValue(ResVReg, I); |
| case TargetOpcode::G_IMPLICIT_DEF: |
| return selectOpUndef(ResVReg, ResType, I); |
| |
| case TargetOpcode::G_INTRINSIC_W_SIDE_EFFECTS: |
| return selectIntrinsic(ResVReg, ResType, I); |
| case TargetOpcode::G_BITREVERSE: |
| return selectBitreverse(ResVReg, ResType, I); |
| |
| case TargetOpcode::G_BUILD_VECTOR: |
| return selectConstVector(ResVReg, ResType, I); |
| |
| case TargetOpcode::G_SHUFFLE_VECTOR: { |
| MachineBasicBlock &BB = *I.getParent(); |
| auto MIB = BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpVectorShuffle)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .addUse(I.getOperand(1).getReg()) |
| .addUse(I.getOperand(2).getReg()); |
| for (auto V : I.getOperand(3).getShuffleMask()) |
| MIB.addImm(V); |
| return MIB.constrainAllUses(TII, TRI, RBI); |
| } |
| case TargetOpcode::G_MEMMOVE: |
| case TargetOpcode::G_MEMCPY: |
| case TargetOpcode::G_MEMSET: |
| return selectMemOperation(ResVReg, I); |
| |
| case TargetOpcode::G_ICMP: |
| return selectICmp(ResVReg, ResType, I); |
| case TargetOpcode::G_FCMP: |
| return selectFCmp(ResVReg, ResType, I); |
| |
| case TargetOpcode::G_FRAME_INDEX: |
| return selectFrameIndex(ResVReg, ResType, I); |
| |
| case TargetOpcode::G_LOAD: |
| return selectLoad(ResVReg, ResType, I); |
| case TargetOpcode::G_STORE: |
| return selectStore(I); |
| |
| case TargetOpcode::G_BR: |
| return selectBranch(I); |
| case TargetOpcode::G_BRCOND: |
| return selectBranchCond(I); |
| |
| case TargetOpcode::G_PHI: |
| return selectPhi(ResVReg, ResType, I); |
| |
| case TargetOpcode::G_FPTOSI: |
| return selectUnOp(ResVReg, ResType, I, SPIRV::OpConvertFToS); |
| case TargetOpcode::G_FPTOUI: |
| return selectUnOp(ResVReg, ResType, I, SPIRV::OpConvertFToU); |
| |
| case TargetOpcode::G_SITOFP: |
| return selectIToF(ResVReg, ResType, I, true, SPIRV::OpConvertSToF); |
| case TargetOpcode::G_UITOFP: |
| return selectIToF(ResVReg, ResType, I, false, SPIRV::OpConvertUToF); |
| |
| case TargetOpcode::G_CTPOP: |
| return selectUnOp(ResVReg, ResType, I, SPIRV::OpBitCount); |
| case TargetOpcode::G_SMIN: |
| return selectExtInst(ResVReg, ResType, I, CL::s_min, GL::SMin); |
| case TargetOpcode::G_UMIN: |
| return selectExtInst(ResVReg, ResType, I, CL::u_min, GL::UMin); |
| |
| case TargetOpcode::G_SMAX: |
| return selectExtInst(ResVReg, ResType, I, CL::s_max, GL::SMax); |
| case TargetOpcode::G_UMAX: |
| return selectExtInst(ResVReg, ResType, I, CL::u_max, GL::UMax); |
| |
| case TargetOpcode::G_FMA: |
| return selectExtInst(ResVReg, ResType, I, CL::fma, GL::Fma); |
| |
| case TargetOpcode::G_FPOW: |
| return selectExtInst(ResVReg, ResType, I, CL::pow, GL::Pow); |
| case TargetOpcode::G_FPOWI: |
| return selectExtInst(ResVReg, ResType, I, CL::pown); |
| |
| case TargetOpcode::G_FEXP: |
| return selectExtInst(ResVReg, ResType, I, CL::exp, GL::Exp); |
| case TargetOpcode::G_FEXP2: |
| return selectExtInst(ResVReg, ResType, I, CL::exp2, GL::Exp2); |
| |
| case TargetOpcode::G_FLOG: |
| return selectExtInst(ResVReg, ResType, I, CL::log, GL::Log); |
| case TargetOpcode::G_FLOG2: |
| return selectExtInst(ResVReg, ResType, I, CL::log2, GL::Log2); |
| case TargetOpcode::G_FLOG10: |
| return selectExtInst(ResVReg, ResType, I, CL::log10); |
| |
| case TargetOpcode::G_FABS: |
| return selectExtInst(ResVReg, ResType, I, CL::fabs, GL::FAbs); |
| case TargetOpcode::G_ABS: |
| return selectExtInst(ResVReg, ResType, I, CL::s_abs, GL::SAbs); |
| |
| case TargetOpcode::G_FMINNUM: |
| case TargetOpcode::G_FMINIMUM: |
| return selectExtInst(ResVReg, ResType, I, CL::fmin, GL::FMin); |
| case TargetOpcode::G_FMAXNUM: |
| case TargetOpcode::G_FMAXIMUM: |
| return selectExtInst(ResVReg, ResType, I, CL::fmax, GL::FMax); |
| |
| case TargetOpcode::G_FCOPYSIGN: |
| return selectExtInst(ResVReg, ResType, I, CL::copysign); |
| |
| case TargetOpcode::G_FCEIL: |
| return selectExtInst(ResVReg, ResType, I, CL::ceil, GL::Ceil); |
| case TargetOpcode::G_FFLOOR: |
| return selectExtInst(ResVReg, ResType, I, CL::floor, GL::Floor); |
| |
| case TargetOpcode::G_FCOS: |
| return selectExtInst(ResVReg, ResType, I, CL::cos, GL::Cos); |
| case TargetOpcode::G_FSIN: |
| return selectExtInst(ResVReg, ResType, I, CL::sin, GL::Sin); |
| |
| case TargetOpcode::G_FSQRT: |
| return selectExtInst(ResVReg, ResType, I, CL::sqrt, GL::Sqrt); |
| |
| case TargetOpcode::G_CTTZ: |
| case TargetOpcode::G_CTTZ_ZERO_UNDEF: |
| return selectExtInst(ResVReg, ResType, I, CL::ctz); |
| case TargetOpcode::G_CTLZ: |
| case TargetOpcode::G_CTLZ_ZERO_UNDEF: |
| return selectExtInst(ResVReg, ResType, I, CL::clz); |
| |
| case TargetOpcode::G_INTRINSIC_ROUND: |
| return selectExtInst(ResVReg, ResType, I, CL::round, GL::Round); |
| case TargetOpcode::G_INTRINSIC_ROUNDEVEN: |
| return selectExtInst(ResVReg, ResType, I, CL::rint, GL::RoundEven); |
| case TargetOpcode::G_INTRINSIC_TRUNC: |
| return selectExtInst(ResVReg, ResType, I, CL::trunc, GL::Trunc); |
| case TargetOpcode::G_FRINT: |
| case TargetOpcode::G_FNEARBYINT: |
| return selectExtInst(ResVReg, ResType, I, CL::rint, GL::RoundEven); |
| |
| case TargetOpcode::G_SMULH: |
| return selectExtInst(ResVReg, ResType, I, CL::s_mul_hi); |
| case TargetOpcode::G_UMULH: |
| return selectExtInst(ResVReg, ResType, I, CL::u_mul_hi); |
| |
| case TargetOpcode::G_SEXT: |
| return selectExt(ResVReg, ResType, I, true); |
| case TargetOpcode::G_ANYEXT: |
| case TargetOpcode::G_ZEXT: |
| return selectExt(ResVReg, ResType, I, false); |
| case TargetOpcode::G_TRUNC: |
| return selectTrunc(ResVReg, ResType, I); |
| case TargetOpcode::G_FPTRUNC: |
| case TargetOpcode::G_FPEXT: |
| return selectUnOp(ResVReg, ResType, I, SPIRV::OpFConvert); |
| |
| case TargetOpcode::G_PTRTOINT: |
| return selectUnOp(ResVReg, ResType, I, SPIRV::OpConvertPtrToU); |
| case TargetOpcode::G_INTTOPTR: |
| return selectUnOp(ResVReg, ResType, I, SPIRV::OpConvertUToPtr); |
| case TargetOpcode::G_BITCAST: |
| return selectUnOp(ResVReg, ResType, I, SPIRV::OpBitcast); |
| case TargetOpcode::G_ADDRSPACE_CAST: |
| return selectAddrSpaceCast(ResVReg, ResType, I); |
| case TargetOpcode::G_PTR_ADD: { |
| // Currently, we get G_PTR_ADD only as a result of translating |
| // global variables, initialized with constant expressions like GV + Const |
| // (see test opencl/basic/progvar_prog_scope_init.ll). |
| // TODO: extend the handler once we have other cases. |
| assert(I.getOperand(1).isReg() && I.getOperand(2).isReg()); |
| Register GV = I.getOperand(1).getReg(); |
| MachineRegisterInfo::def_instr_iterator II = MRI->def_instr_begin(GV); |
| assert(((*II).getOpcode() == TargetOpcode::G_GLOBAL_VALUE || |
| (*II).getOpcode() == TargetOpcode::COPY || |
| (*II).getOpcode() == SPIRV::OpVariable) && |
| isImm(I.getOperand(2), MRI)); |
| Register Idx = buildZerosVal(GR.getOrCreateSPIRVIntegerType(32, I, TII), I); |
| MachineBasicBlock &BB = *I.getParent(); |
| auto MIB = BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpSpecConstantOp)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .addImm(static_cast<uint32_t>( |
| SPIRV::Opcode::InBoundsPtrAccessChain)) |
| .addUse(GV) |
| .addUse(Idx) |
| .addUse(I.getOperand(2).getReg()); |
| return MIB.constrainAllUses(TII, TRI, RBI); |
| } |
| |
| case TargetOpcode::G_ATOMICRMW_OR: |
| return selectAtomicRMW(ResVReg, ResType, I, SPIRV::OpAtomicOr); |
| case TargetOpcode::G_ATOMICRMW_ADD: |
| return selectAtomicRMW(ResVReg, ResType, I, SPIRV::OpAtomicIAdd); |
| case TargetOpcode::G_ATOMICRMW_AND: |
| return selectAtomicRMW(ResVReg, ResType, I, SPIRV::OpAtomicAnd); |
| case TargetOpcode::G_ATOMICRMW_MAX: |
| return selectAtomicRMW(ResVReg, ResType, I, SPIRV::OpAtomicSMax); |
| case TargetOpcode::G_ATOMICRMW_MIN: |
| return selectAtomicRMW(ResVReg, ResType, I, SPIRV::OpAtomicSMin); |
| case TargetOpcode::G_ATOMICRMW_SUB: |
| return selectAtomicRMW(ResVReg, ResType, I, SPIRV::OpAtomicISub); |
| case TargetOpcode::G_ATOMICRMW_XOR: |
| return selectAtomicRMW(ResVReg, ResType, I, SPIRV::OpAtomicXor); |
| case TargetOpcode::G_ATOMICRMW_UMAX: |
| return selectAtomicRMW(ResVReg, ResType, I, SPIRV::OpAtomicUMax); |
| case TargetOpcode::G_ATOMICRMW_UMIN: |
| return selectAtomicRMW(ResVReg, ResType, I, SPIRV::OpAtomicUMin); |
| case TargetOpcode::G_ATOMICRMW_XCHG: |
| return selectAtomicRMW(ResVReg, ResType, I, SPIRV::OpAtomicExchange); |
| case TargetOpcode::G_ATOMIC_CMPXCHG: |
| return selectAtomicCmpXchg(ResVReg, ResType, I); |
| |
| case TargetOpcode::G_FENCE: |
| return selectFence(I); |
| |
| default: |
| return false; |
| } |
| } |
| |
| bool SPIRVInstructionSelector::selectExtInst(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I, |
| CL::OpenCLExtInst CLInst) const { |
| return selectExtInst(ResVReg, ResType, I, |
| {{SPIRV::InstructionSet::OpenCL_std, CLInst}}); |
| } |
| |
| bool SPIRVInstructionSelector::selectExtInst(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I, |
| CL::OpenCLExtInst CLInst, |
| GL::GLSLExtInst GLInst) const { |
| ExtInstList ExtInsts = {{SPIRV::InstructionSet::OpenCL_std, CLInst}, |
| {SPIRV::InstructionSet::GLSL_std_450, GLInst}}; |
| return selectExtInst(ResVReg, ResType, I, ExtInsts); |
| } |
| |
| bool SPIRVInstructionSelector::selectExtInst(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I, |
| const ExtInstList &Insts) const { |
| |
| for (const auto &Ex : Insts) { |
| SPIRV::InstructionSet::InstructionSet Set = Ex.first; |
| uint32_t Opcode = Ex.second; |
| if (STI.canUseExtInstSet(Set)) { |
| MachineBasicBlock &BB = *I.getParent(); |
| auto MIB = BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpExtInst)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .addImm(static_cast<uint32_t>(Set)) |
| .addImm(Opcode); |
| const unsigned NumOps = I.getNumOperands(); |
| for (unsigned i = 1; i < NumOps; ++i) |
| MIB.add(I.getOperand(i)); |
| return MIB.constrainAllUses(TII, TRI, RBI); |
| } |
| } |
| return false; |
| } |
| |
| bool SPIRVInstructionSelector::selectUnOpWithSrc(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I, |
| Register SrcReg, |
| unsigned Opcode) const { |
| return BuildMI(*I.getParent(), I, I.getDebugLoc(), TII.get(Opcode)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .addUse(SrcReg) |
| .constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectUnOp(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I, |
| unsigned Opcode) const { |
| return selectUnOpWithSrc(ResVReg, ResType, I, I.getOperand(1).getReg(), |
| Opcode); |
| } |
| |
| static SPIRV::Scope::Scope getScope(SyncScope::ID Ord) { |
| switch (Ord) { |
| case SyncScope::SingleThread: |
| return SPIRV::Scope::Invocation; |
| case SyncScope::System: |
| return SPIRV::Scope::Device; |
| default: |
| llvm_unreachable("Unsupported synchronization Scope ID."); |
| } |
| } |
| |
| static void addMemoryOperands(MachineMemOperand *MemOp, |
| MachineInstrBuilder &MIB) { |
| uint32_t SpvMemOp = static_cast<uint32_t>(SPIRV::MemoryOperand::None); |
| if (MemOp->isVolatile()) |
| SpvMemOp |= static_cast<uint32_t>(SPIRV::MemoryOperand::Volatile); |
| if (MemOp->isNonTemporal()) |
| SpvMemOp |= static_cast<uint32_t>(SPIRV::MemoryOperand::Nontemporal); |
| if (MemOp->getAlign().value()) |
| SpvMemOp |= static_cast<uint32_t>(SPIRV::MemoryOperand::Aligned); |
| |
| if (SpvMemOp != static_cast<uint32_t>(SPIRV::MemoryOperand::None)) { |
| MIB.addImm(SpvMemOp); |
| if (SpvMemOp & static_cast<uint32_t>(SPIRV::MemoryOperand::Aligned)) |
| MIB.addImm(MemOp->getAlign().value()); |
| } |
| } |
| |
| static void addMemoryOperands(uint64_t Flags, MachineInstrBuilder &MIB) { |
| uint32_t SpvMemOp = static_cast<uint32_t>(SPIRV::MemoryOperand::None); |
| if (Flags & MachineMemOperand::Flags::MOVolatile) |
| SpvMemOp |= static_cast<uint32_t>(SPIRV::MemoryOperand::Volatile); |
| if (Flags & MachineMemOperand::Flags::MONonTemporal) |
| SpvMemOp |= static_cast<uint32_t>(SPIRV::MemoryOperand::Nontemporal); |
| |
| if (SpvMemOp != static_cast<uint32_t>(SPIRV::MemoryOperand::None)) |
| MIB.addImm(SpvMemOp); |
| } |
| |
| bool SPIRVInstructionSelector::selectLoad(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| unsigned OpOffset = |
| I.getOpcode() == TargetOpcode::G_INTRINSIC_W_SIDE_EFFECTS ? 1 : 0; |
| Register Ptr = I.getOperand(1 + OpOffset).getReg(); |
| auto MIB = BuildMI(*I.getParent(), I, I.getDebugLoc(), TII.get(SPIRV::OpLoad)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .addUse(Ptr); |
| if (!I.getNumMemOperands()) { |
| assert(I.getOpcode() == TargetOpcode::G_INTRINSIC_W_SIDE_EFFECTS); |
| addMemoryOperands(I.getOperand(2 + OpOffset).getImm(), MIB); |
| } else { |
| addMemoryOperands(*I.memoperands_begin(), MIB); |
| } |
| return MIB.constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectStore(MachineInstr &I) const { |
| unsigned OpOffset = |
| I.getOpcode() == TargetOpcode::G_INTRINSIC_W_SIDE_EFFECTS ? 1 : 0; |
| Register StoreVal = I.getOperand(0 + OpOffset).getReg(); |
| Register Ptr = I.getOperand(1 + OpOffset).getReg(); |
| MachineBasicBlock &BB = *I.getParent(); |
| auto MIB = BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpStore)) |
| .addUse(Ptr) |
| .addUse(StoreVal); |
| if (!I.getNumMemOperands()) { |
| assert(I.getOpcode() == TargetOpcode::G_INTRINSIC_W_SIDE_EFFECTS); |
| addMemoryOperands(I.getOperand(2 + OpOffset).getImm(), MIB); |
| } else { |
| addMemoryOperands(*I.memoperands_begin(), MIB); |
| } |
| return MIB.constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectMemOperation(Register ResVReg, |
| MachineInstr &I) const { |
| MachineBasicBlock &BB = *I.getParent(); |
| Register SrcReg = I.getOperand(1).getReg(); |
| if (I.getOpcode() == TargetOpcode::G_MEMSET) { |
| assert(I.getOperand(1).isReg() && I.getOperand(2).isReg()); |
| unsigned Val = getIConstVal(I.getOperand(1).getReg(), MRI); |
| unsigned Num = getIConstVal(I.getOperand(2).getReg(), MRI); |
| SPIRVType *ValTy = GR.getOrCreateSPIRVIntegerType(8, I, TII); |
| SPIRVType *ArrTy = GR.getOrCreateSPIRVArrayType(ValTy, Num, I, TII); |
| Register Const = GR.getOrCreateConsIntArray(Val, I, ArrTy, TII); |
| SPIRVType *VarTy = GR.getOrCreateSPIRVPointerType( |
| ArrTy, I, TII, SPIRV::StorageClass::UniformConstant); |
| // TODO: check if we have such GV, add init, use buildGlobalVariable. |
| Type *LLVMArrTy = ArrayType::get( |
| IntegerType::get(GR.CurMF->getFunction().getContext(), 8), Num); |
| GlobalVariable *GV = |
| new GlobalVariable(LLVMArrTy, true, GlobalValue::InternalLinkage); |
| Register VarReg = MRI->createGenericVirtualRegister(LLT::scalar(32)); |
| GR.add(GV, GR.CurMF, VarReg); |
| |
| buildOpDecorate(VarReg, I, TII, SPIRV::Decoration::Constant, {}); |
| BuildMI(*I.getParent(), I, I.getDebugLoc(), TII.get(SPIRV::OpVariable)) |
| .addDef(VarReg) |
| .addUse(GR.getSPIRVTypeID(VarTy)) |
| .addImm(SPIRV::StorageClass::UniformConstant) |
| .addUse(Const) |
| .constrainAllUses(TII, TRI, RBI); |
| SPIRVType *SourceTy = GR.getOrCreateSPIRVPointerType( |
| ValTy, I, TII, SPIRV::StorageClass::UniformConstant); |
| SrcReg = MRI->createGenericVirtualRegister(LLT::scalar(32)); |
| selectUnOpWithSrc(SrcReg, SourceTy, I, VarReg, SPIRV::OpBitcast); |
| } |
| auto MIB = BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpCopyMemorySized)) |
| .addUse(I.getOperand(0).getReg()) |
| .addUse(SrcReg) |
| .addUse(I.getOperand(2).getReg()); |
| if (I.getNumMemOperands()) |
| addMemoryOperands(*I.memoperands_begin(), MIB); |
| bool Result = MIB.constrainAllUses(TII, TRI, RBI); |
| if (ResVReg.isValid() && ResVReg != MIB->getOperand(0).getReg()) |
| BuildMI(BB, I, I.getDebugLoc(), TII.get(TargetOpcode::COPY), ResVReg) |
| .addUse(MIB->getOperand(0).getReg()); |
| return Result; |
| } |
| |
| bool SPIRVInstructionSelector::selectAtomicRMW(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I, |
| unsigned NewOpcode) const { |
| assert(I.hasOneMemOperand()); |
| const MachineMemOperand *MemOp = *I.memoperands_begin(); |
| uint32_t Scope = static_cast<uint32_t>(getScope(MemOp->getSyncScopeID())); |
| Register ScopeReg = buildI32Constant(Scope, I); |
| |
| Register Ptr = I.getOperand(1).getReg(); |
| // TODO: Changed as it's implemented in the translator. See test/atomicrmw.ll |
| // auto ScSem = |
| // getMemSemanticsForStorageClass(GR.getPointerStorageClass(Ptr)); |
| AtomicOrdering AO = MemOp->getSuccessOrdering(); |
| uint32_t MemSem = static_cast<uint32_t>(getMemSemantics(AO)); |
| Register MemSemReg = buildI32Constant(MemSem /*| ScSem*/, I); |
| |
| return BuildMI(*I.getParent(), I, I.getDebugLoc(), TII.get(NewOpcode)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .addUse(Ptr) |
| .addUse(ScopeReg) |
| .addUse(MemSemReg) |
| .addUse(I.getOperand(2).getReg()) |
| .constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectFence(MachineInstr &I) const { |
| AtomicOrdering AO = AtomicOrdering(I.getOperand(0).getImm()); |
| uint32_t MemSem = static_cast<uint32_t>(getMemSemantics(AO)); |
| Register MemSemReg = buildI32Constant(MemSem, I); |
| SyncScope::ID Ord = SyncScope::ID(I.getOperand(1).getImm()); |
| uint32_t Scope = static_cast<uint32_t>(getScope(Ord)); |
| Register ScopeReg = buildI32Constant(Scope, I); |
| MachineBasicBlock &BB = *I.getParent(); |
| return BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpMemoryBarrier)) |
| .addUse(ScopeReg) |
| .addUse(MemSemReg) |
| .constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectAtomicCmpXchg(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| Register ScopeReg; |
| Register MemSemEqReg; |
| Register MemSemNeqReg; |
| Register Ptr = I.getOperand(2).getReg(); |
| if (I.getOpcode() != TargetOpcode::G_INTRINSIC_W_SIDE_EFFECTS) { |
| assert(I.hasOneMemOperand()); |
| const MachineMemOperand *MemOp = *I.memoperands_begin(); |
| unsigned Scope = static_cast<uint32_t>(getScope(MemOp->getSyncScopeID())); |
| ScopeReg = buildI32Constant(Scope, I); |
| |
| unsigned ScSem = static_cast<uint32_t>( |
| getMemSemanticsForStorageClass(GR.getPointerStorageClass(Ptr))); |
| AtomicOrdering AO = MemOp->getSuccessOrdering(); |
| unsigned MemSemEq = static_cast<uint32_t>(getMemSemantics(AO)) | ScSem; |
| MemSemEqReg = buildI32Constant(MemSemEq, I); |
| AtomicOrdering FO = MemOp->getFailureOrdering(); |
| unsigned MemSemNeq = static_cast<uint32_t>(getMemSemantics(FO)) | ScSem; |
| MemSemNeqReg = |
| MemSemEq == MemSemNeq ? MemSemEqReg : buildI32Constant(MemSemNeq, I); |
| } else { |
| ScopeReg = I.getOperand(5).getReg(); |
| MemSemEqReg = I.getOperand(6).getReg(); |
| MemSemNeqReg = I.getOperand(7).getReg(); |
| } |
| |
| Register Cmp = I.getOperand(3).getReg(); |
| Register Val = I.getOperand(4).getReg(); |
| SPIRVType *SpvValTy = GR.getSPIRVTypeForVReg(Val); |
| Register ACmpRes = MRI->createVirtualRegister(&SPIRV::IDRegClass); |
| const DebugLoc &DL = I.getDebugLoc(); |
| bool Result = |
| BuildMI(*I.getParent(), I, DL, TII.get(SPIRV::OpAtomicCompareExchange)) |
| .addDef(ACmpRes) |
| .addUse(GR.getSPIRVTypeID(SpvValTy)) |
| .addUse(Ptr) |
| .addUse(ScopeReg) |
| .addUse(MemSemEqReg) |
| .addUse(MemSemNeqReg) |
| .addUse(Val) |
| .addUse(Cmp) |
| .constrainAllUses(TII, TRI, RBI); |
| Register CmpSuccReg = MRI->createVirtualRegister(&SPIRV::IDRegClass); |
| SPIRVType *BoolTy = GR.getOrCreateSPIRVBoolType(I, TII); |
| Result |= BuildMI(*I.getParent(), I, DL, TII.get(SPIRV::OpIEqual)) |
| .addDef(CmpSuccReg) |
| .addUse(GR.getSPIRVTypeID(BoolTy)) |
| .addUse(ACmpRes) |
| .addUse(Cmp) |
| .constrainAllUses(TII, TRI, RBI); |
| Register TmpReg = MRI->createVirtualRegister(&SPIRV::IDRegClass); |
| Result |= BuildMI(*I.getParent(), I, DL, TII.get(SPIRV::OpCompositeInsert)) |
| .addDef(TmpReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .addUse(ACmpRes) |
| .addUse(GR.getOrCreateUndef(I, ResType, TII)) |
| .addImm(0) |
| .constrainAllUses(TII, TRI, RBI); |
| Result |= BuildMI(*I.getParent(), I, DL, TII.get(SPIRV::OpCompositeInsert)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .addUse(CmpSuccReg) |
| .addUse(TmpReg) |
| .addImm(1) |
| .constrainAllUses(TII, TRI, RBI); |
| return Result; |
| } |
| |
| static bool isGenericCastablePtr(SPIRV::StorageClass::StorageClass SC) { |
| switch (SC) { |
| case SPIRV::StorageClass::Workgroup: |
| case SPIRV::StorageClass::CrossWorkgroup: |
| case SPIRV::StorageClass::Function: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| // In SPIR-V address space casting can only happen to and from the Generic |
| // storage class. We can also only case Workgroup, CrossWorkgroup, or Function |
| // pointers to and from Generic pointers. As such, we can convert e.g. from |
| // Workgroup to Function by going via a Generic pointer as an intermediary. All |
| // other combinations can only be done by a bitcast, and are probably not safe. |
| bool SPIRVInstructionSelector::selectAddrSpaceCast(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| // If the AddrSpaceCast user is single and in OpConstantComposite or |
| // OpVariable, we should select OpSpecConstantOp. |
| auto UIs = MRI->use_instructions(ResVReg); |
| if (!UIs.empty() && ++UIs.begin() == UIs.end() && |
| (UIs.begin()->getOpcode() == SPIRV::OpConstantComposite || |
| UIs.begin()->getOpcode() == SPIRV::OpVariable || |
| isSpvIntrinsic(*UIs.begin(), Intrinsic::spv_init_global))) { |
| Register NewReg = I.getOperand(1).getReg(); |
| MachineBasicBlock &BB = *I.getParent(); |
| SPIRVType *SpvBaseTy = GR.getOrCreateSPIRVIntegerType(8, I, TII); |
| ResType = GR.getOrCreateSPIRVPointerType(SpvBaseTy, I, TII, |
| SPIRV::StorageClass::Generic); |
| bool Result = |
| BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpSpecConstantOp)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .addImm(static_cast<uint32_t>(SPIRV::Opcode::PtrCastToGeneric)) |
| .addUse(NewReg) |
| .constrainAllUses(TII, TRI, RBI); |
| return Result; |
| } |
| Register SrcPtr = I.getOperand(1).getReg(); |
| SPIRVType *SrcPtrTy = GR.getSPIRVTypeForVReg(SrcPtr); |
| SPIRV::StorageClass::StorageClass SrcSC = GR.getPointerStorageClass(SrcPtr); |
| SPIRV::StorageClass::StorageClass DstSC = GR.getPointerStorageClass(ResVReg); |
| |
| // Casting from an eligable pointer to Generic. |
| if (DstSC == SPIRV::StorageClass::Generic && isGenericCastablePtr(SrcSC)) |
| return selectUnOp(ResVReg, ResType, I, SPIRV::OpPtrCastToGeneric); |
| // Casting from Generic to an eligable pointer. |
| if (SrcSC == SPIRV::StorageClass::Generic && isGenericCastablePtr(DstSC)) |
| return selectUnOp(ResVReg, ResType, I, SPIRV::OpGenericCastToPtr); |
| // Casting between 2 eligable pointers using Generic as an intermediary. |
| if (isGenericCastablePtr(SrcSC) && isGenericCastablePtr(DstSC)) { |
| Register Tmp = MRI->createVirtualRegister(&SPIRV::IDRegClass); |
| SPIRVType *GenericPtrTy = GR.getOrCreateSPIRVPointerType( |
| SrcPtrTy, I, TII, SPIRV::StorageClass::Generic); |
| MachineBasicBlock &BB = *I.getParent(); |
| const DebugLoc &DL = I.getDebugLoc(); |
| bool Success = BuildMI(BB, I, DL, TII.get(SPIRV::OpPtrCastToGeneric)) |
| .addDef(Tmp) |
| .addUse(GR.getSPIRVTypeID(GenericPtrTy)) |
| .addUse(SrcPtr) |
| .constrainAllUses(TII, TRI, RBI); |
| return Success && BuildMI(BB, I, DL, TII.get(SPIRV::OpGenericCastToPtr)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .addUse(Tmp) |
| .constrainAllUses(TII, TRI, RBI); |
| } |
| // TODO Should this case just be disallowed completely? |
| // We're casting 2 other arbitrary address spaces, so have to bitcast. |
| return selectUnOp(ResVReg, ResType, I, SPIRV::OpBitcast); |
| } |
| |
| static unsigned getFCmpOpcode(unsigned PredNum) { |
| auto Pred = static_cast<CmpInst::Predicate>(PredNum); |
| switch (Pred) { |
| case CmpInst::FCMP_OEQ: |
| return SPIRV::OpFOrdEqual; |
| case CmpInst::FCMP_OGE: |
| return SPIRV::OpFOrdGreaterThanEqual; |
| case CmpInst::FCMP_OGT: |
| return SPIRV::OpFOrdGreaterThan; |
| case CmpInst::FCMP_OLE: |
| return SPIRV::OpFOrdLessThanEqual; |
| case CmpInst::FCMP_OLT: |
| return SPIRV::OpFOrdLessThan; |
| case CmpInst::FCMP_ONE: |
| return SPIRV::OpFOrdNotEqual; |
| case CmpInst::FCMP_ORD: |
| return SPIRV::OpOrdered; |
| case CmpInst::FCMP_UEQ: |
| return SPIRV::OpFUnordEqual; |
| case CmpInst::FCMP_UGE: |
| return SPIRV::OpFUnordGreaterThanEqual; |
| case CmpInst::FCMP_UGT: |
| return SPIRV::OpFUnordGreaterThan; |
| case CmpInst::FCMP_ULE: |
| return SPIRV::OpFUnordLessThanEqual; |
| case CmpInst::FCMP_ULT: |
| return SPIRV::OpFUnordLessThan; |
| case CmpInst::FCMP_UNE: |
| return SPIRV::OpFUnordNotEqual; |
| case CmpInst::FCMP_UNO: |
| return SPIRV::OpUnordered; |
| default: |
| llvm_unreachable("Unknown predicate type for FCmp"); |
| } |
| } |
| |
| static unsigned getICmpOpcode(unsigned PredNum) { |
| auto Pred = static_cast<CmpInst::Predicate>(PredNum); |
| switch (Pred) { |
| case CmpInst::ICMP_EQ: |
| return SPIRV::OpIEqual; |
| case CmpInst::ICMP_NE: |
| return SPIRV::OpINotEqual; |
| case CmpInst::ICMP_SGE: |
| return SPIRV::OpSGreaterThanEqual; |
| case CmpInst::ICMP_SGT: |
| return SPIRV::OpSGreaterThan; |
| case CmpInst::ICMP_SLE: |
| return SPIRV::OpSLessThanEqual; |
| case CmpInst::ICMP_SLT: |
| return SPIRV::OpSLessThan; |
| case CmpInst::ICMP_UGE: |
| return SPIRV::OpUGreaterThanEqual; |
| case CmpInst::ICMP_UGT: |
| return SPIRV::OpUGreaterThan; |
| case CmpInst::ICMP_ULE: |
| return SPIRV::OpULessThanEqual; |
| case CmpInst::ICMP_ULT: |
| return SPIRV::OpULessThan; |
| default: |
| llvm_unreachable("Unknown predicate type for ICmp"); |
| } |
| } |
| |
| static unsigned getPtrCmpOpcode(unsigned Pred) { |
| switch (static_cast<CmpInst::Predicate>(Pred)) { |
| case CmpInst::ICMP_EQ: |
| return SPIRV::OpPtrEqual; |
| case CmpInst::ICMP_NE: |
| return SPIRV::OpPtrNotEqual; |
| default: |
| llvm_unreachable("Unknown predicate type for pointer comparison"); |
| } |
| } |
| |
| // Return the logical operation, or abort if none exists. |
| static unsigned getBoolCmpOpcode(unsigned PredNum) { |
| auto Pred = static_cast<CmpInst::Predicate>(PredNum); |
| switch (Pred) { |
| case CmpInst::ICMP_EQ: |
| return SPIRV::OpLogicalEqual; |
| case CmpInst::ICMP_NE: |
| return SPIRV::OpLogicalNotEqual; |
| default: |
| llvm_unreachable("Unknown predicate type for Bool comparison"); |
| } |
| } |
| |
| bool SPIRVInstructionSelector::selectBitreverse(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| MachineBasicBlock &BB = *I.getParent(); |
| return BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpBitReverse)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .addUse(I.getOperand(1).getReg()) |
| .constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectConstVector(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| // TODO: only const case is supported for now. |
| assert(std::all_of( |
| I.operands_begin(), I.operands_end(), [this](const MachineOperand &MO) { |
| if (MO.isDef()) |
| return true; |
| if (!MO.isReg()) |
| return false; |
| SPIRVType *ConstTy = this->MRI->getVRegDef(MO.getReg()); |
| assert(ConstTy && ConstTy->getOpcode() == SPIRV::ASSIGN_TYPE && |
| ConstTy->getOperand(1).isReg()); |
| Register ConstReg = ConstTy->getOperand(1).getReg(); |
| const MachineInstr *Const = this->MRI->getVRegDef(ConstReg); |
| assert(Const); |
| return (Const->getOpcode() == TargetOpcode::G_CONSTANT || |
| Const->getOpcode() == TargetOpcode::G_FCONSTANT); |
| })); |
| |
| auto MIB = BuildMI(*I.getParent(), I, I.getDebugLoc(), |
| TII.get(SPIRV::OpConstantComposite)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)); |
| for (unsigned i = I.getNumExplicitDefs(); i < I.getNumExplicitOperands(); ++i) |
| MIB.addUse(I.getOperand(i).getReg()); |
| return MIB.constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectCmp(Register ResVReg, |
| const SPIRVType *ResType, |
| unsigned CmpOpc, |
| MachineInstr &I) const { |
| Register Cmp0 = I.getOperand(2).getReg(); |
| Register Cmp1 = I.getOperand(3).getReg(); |
| assert(GR.getSPIRVTypeForVReg(Cmp0)->getOpcode() == |
| GR.getSPIRVTypeForVReg(Cmp1)->getOpcode() && |
| "CMP operands should have the same type"); |
| return BuildMI(*I.getParent(), I, I.getDebugLoc(), TII.get(CmpOpc)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .addUse(Cmp0) |
| .addUse(Cmp1) |
| .constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectICmp(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| auto Pred = I.getOperand(1).getPredicate(); |
| unsigned CmpOpc; |
| |
| Register CmpOperand = I.getOperand(2).getReg(); |
| if (GR.isScalarOfType(CmpOperand, SPIRV::OpTypePointer)) |
| CmpOpc = getPtrCmpOpcode(Pred); |
| else if (GR.isScalarOrVectorOfType(CmpOperand, SPIRV::OpTypeBool)) |
| CmpOpc = getBoolCmpOpcode(Pred); |
| else |
| CmpOpc = getICmpOpcode(Pred); |
| return selectCmp(ResVReg, ResType, CmpOpc, I); |
| } |
| |
| void SPIRVInstructionSelector::renderFImm32(MachineInstrBuilder &MIB, |
| const MachineInstr &I, |
| int OpIdx) const { |
| assert(I.getOpcode() == TargetOpcode::G_FCONSTANT && OpIdx == -1 && |
| "Expected G_FCONSTANT"); |
| const ConstantFP *FPImm = I.getOperand(1).getFPImm(); |
| addNumImm(FPImm->getValueAPF().bitcastToAPInt(), MIB); |
| } |
| |
| void SPIRVInstructionSelector::renderImm32(MachineInstrBuilder &MIB, |
| const MachineInstr &I, |
| int OpIdx) const { |
| assert(I.getOpcode() == TargetOpcode::G_CONSTANT && OpIdx == -1 && |
| "Expected G_CONSTANT"); |
| addNumImm(I.getOperand(1).getCImm()->getValue(), MIB); |
| } |
| |
| Register |
| SPIRVInstructionSelector::buildI32Constant(uint32_t Val, MachineInstr &I, |
| const SPIRVType *ResType) const { |
| Type *LLVMTy = IntegerType::get(GR.CurMF->getFunction().getContext(), 32); |
| const SPIRVType *SpvI32Ty = |
| ResType ? ResType : GR.getOrCreateSPIRVIntegerType(32, I, TII); |
| // Find a constant in DT or build a new one. |
| auto ConstInt = ConstantInt::get(LLVMTy, Val); |
| Register NewReg = GR.find(ConstInt, GR.CurMF); |
| if (!NewReg.isValid()) { |
| NewReg = MRI->createGenericVirtualRegister(LLT::scalar(32)); |
| GR.add(ConstInt, GR.CurMF, NewReg); |
| MachineInstr *MI; |
| MachineBasicBlock &BB = *I.getParent(); |
| if (Val == 0) { |
| MI = BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpConstantNull)) |
| .addDef(NewReg) |
| .addUse(GR.getSPIRVTypeID(SpvI32Ty)); |
| } else { |
| MI = BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpConstantI)) |
| .addDef(NewReg) |
| .addUse(GR.getSPIRVTypeID(SpvI32Ty)) |
| .addImm(APInt(32, Val).getZExtValue()); |
| } |
| constrainSelectedInstRegOperands(*MI, TII, TRI, RBI); |
| } |
| return NewReg; |
| } |
| |
| bool SPIRVInstructionSelector::selectFCmp(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| unsigned CmpOp = getFCmpOpcode(I.getOperand(1).getPredicate()); |
| return selectCmp(ResVReg, ResType, CmpOp, I); |
| } |
| |
| Register SPIRVInstructionSelector::buildZerosVal(const SPIRVType *ResType, |
| MachineInstr &I) const { |
| if (ResType->getOpcode() == SPIRV::OpTypeVector) |
| return GR.getOrCreateConsIntVector(0, I, ResType, TII); |
| return GR.getOrCreateConstInt(0, I, ResType, TII); |
| } |
| |
| Register SPIRVInstructionSelector::buildOnesVal(bool AllOnes, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| unsigned BitWidth = GR.getScalarOrVectorBitWidth(ResType); |
| APInt One = AllOnes ? APInt::getAllOnesValue(BitWidth) |
| : APInt::getOneBitSet(BitWidth, 0); |
| if (ResType->getOpcode() == SPIRV::OpTypeVector) |
| return GR.getOrCreateConsIntVector(One.getZExtValue(), I, ResType, TII); |
| return GR.getOrCreateConstInt(One.getZExtValue(), I, ResType, TII); |
| } |
| |
| bool SPIRVInstructionSelector::selectSelect(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I, |
| bool IsSigned) const { |
| // To extend a bool, we need to use OpSelect between constants. |
| Register ZeroReg = buildZerosVal(ResType, I); |
| Register OneReg = buildOnesVal(IsSigned, ResType, I); |
| bool IsScalarBool = |
| GR.isScalarOfType(I.getOperand(1).getReg(), SPIRV::OpTypeBool); |
| unsigned Opcode = |
| IsScalarBool ? SPIRV::OpSelectSISCond : SPIRV::OpSelectSIVCond; |
| return BuildMI(*I.getParent(), I, I.getDebugLoc(), TII.get(Opcode)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .addUse(I.getOperand(1).getReg()) |
| .addUse(OneReg) |
| .addUse(ZeroReg) |
| .constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectIToF(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I, bool IsSigned, |
| unsigned Opcode) const { |
| Register SrcReg = I.getOperand(1).getReg(); |
| // We can convert bool value directly to float type without OpConvert*ToF, |
| // however the translator generates OpSelect+OpConvert*ToF, so we do the same. |
| if (GR.isScalarOrVectorOfType(I.getOperand(1).getReg(), SPIRV::OpTypeBool)) { |
| unsigned BitWidth = GR.getScalarOrVectorBitWidth(ResType); |
| SPIRVType *TmpType = GR.getOrCreateSPIRVIntegerType(BitWidth, I, TII); |
| if (ResType->getOpcode() == SPIRV::OpTypeVector) { |
| const unsigned NumElts = ResType->getOperand(2).getImm(); |
| TmpType = GR.getOrCreateSPIRVVectorType(TmpType, NumElts, I, TII); |
| } |
| SrcReg = MRI->createVirtualRegister(&SPIRV::IDRegClass); |
| selectSelect(SrcReg, TmpType, I, false); |
| } |
| return selectUnOpWithSrc(ResVReg, ResType, I, SrcReg, Opcode); |
| } |
| |
| bool SPIRVInstructionSelector::selectExt(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I, bool IsSigned) const { |
| if (GR.isScalarOrVectorOfType(I.getOperand(1).getReg(), SPIRV::OpTypeBool)) |
| return selectSelect(ResVReg, ResType, I, IsSigned); |
| unsigned Opcode = IsSigned ? SPIRV::OpSConvert : SPIRV::OpUConvert; |
| return selectUnOp(ResVReg, ResType, I, Opcode); |
| } |
| |
| bool SPIRVInstructionSelector::selectIntToBool(Register IntReg, |
| Register ResVReg, |
| MachineInstr &I, |
| const SPIRVType *IntTy, |
| const SPIRVType *BoolTy) const { |
| // To truncate to a bool, we use OpBitwiseAnd 1 and OpINotEqual to zero. |
| Register BitIntReg = MRI->createVirtualRegister(&SPIRV::IDRegClass); |
| bool IsVectorTy = IntTy->getOpcode() == SPIRV::OpTypeVector; |
| unsigned Opcode = IsVectorTy ? SPIRV::OpBitwiseAndV : SPIRV::OpBitwiseAndS; |
| Register Zero = buildZerosVal(IntTy, I); |
| Register One = buildOnesVal(false, IntTy, I); |
| MachineBasicBlock &BB = *I.getParent(); |
| BuildMI(BB, I, I.getDebugLoc(), TII.get(Opcode)) |
| .addDef(BitIntReg) |
| .addUse(GR.getSPIRVTypeID(IntTy)) |
| .addUse(IntReg) |
| .addUse(One) |
| .constrainAllUses(TII, TRI, RBI); |
| return BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpINotEqual)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(BoolTy)) |
| .addUse(BitIntReg) |
| .addUse(Zero) |
| .constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectTrunc(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| if (GR.isScalarOrVectorOfType(ResVReg, SPIRV::OpTypeBool)) { |
| Register IntReg = I.getOperand(1).getReg(); |
| const SPIRVType *ArgType = GR.getSPIRVTypeForVReg(IntReg); |
| return selectIntToBool(IntReg, ResVReg, I, ArgType, ResType); |
| } |
| bool IsSigned = GR.isScalarOrVectorSigned(ResType); |
| unsigned Opcode = IsSigned ? SPIRV::OpSConvert : SPIRV::OpUConvert; |
| return selectUnOp(ResVReg, ResType, I, Opcode); |
| } |
| |
| bool SPIRVInstructionSelector::selectConst(Register ResVReg, |
| const SPIRVType *ResType, |
| const APInt &Imm, |
| MachineInstr &I) const { |
| unsigned TyOpcode = ResType->getOpcode(); |
| assert(TyOpcode != SPIRV::OpTypePointer || Imm.isNullValue()); |
| MachineBasicBlock &BB = *I.getParent(); |
| if ((TyOpcode == SPIRV::OpTypePointer || TyOpcode == SPIRV::OpTypeEvent) && |
| Imm.isNullValue()) |
| return BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpConstantNull)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .constrainAllUses(TII, TRI, RBI); |
| if (TyOpcode == SPIRV::OpTypeInt) { |
| Register Reg = GR.getOrCreateConstInt(Imm.getZExtValue(), I, ResType, TII); |
| if (Reg == ResVReg) |
| return true; |
| return BuildMI(BB, I, I.getDebugLoc(), TII.get(TargetOpcode::COPY)) |
| .addDef(ResVReg) |
| .addUse(Reg) |
| .constrainAllUses(TII, TRI, RBI); |
| } |
| auto MIB = BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpConstantI)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)); |
| // <=32-bit integers should be caught by the sdag pattern. |
| assert(Imm.getBitWidth() > 32); |
| addNumImm(Imm, MIB); |
| return MIB.constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectOpUndef(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| return BuildMI(*I.getParent(), I, I.getDebugLoc(), TII.get(SPIRV::OpUndef)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .constrainAllUses(TII, TRI, RBI); |
| } |
| |
| static bool isImm(const MachineOperand &MO, MachineRegisterInfo *MRI) { |
| assert(MO.isReg()); |
| const SPIRVType *TypeInst = MRI->getVRegDef(MO.getReg()); |
| if (TypeInst->getOpcode() != SPIRV::ASSIGN_TYPE) |
| return false; |
| assert(TypeInst->getOperand(1).isReg()); |
| MachineInstr *ImmInst = MRI->getVRegDef(TypeInst->getOperand(1).getReg()); |
| return ImmInst->getOpcode() == TargetOpcode::G_CONSTANT; |
| } |
| |
| static int64_t foldImm(const MachineOperand &MO, MachineRegisterInfo *MRI) { |
| const SPIRVType *TypeInst = MRI->getVRegDef(MO.getReg()); |
| MachineInstr *ImmInst = MRI->getVRegDef(TypeInst->getOperand(1).getReg()); |
| assert(ImmInst->getOpcode() == TargetOpcode::G_CONSTANT); |
| return ImmInst->getOperand(1).getCImm()->getZExtValue(); |
| } |
| |
| bool SPIRVInstructionSelector::selectInsertVal(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| MachineBasicBlock &BB = *I.getParent(); |
| auto MIB = BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpCompositeInsert)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| // object to insert |
| .addUse(I.getOperand(3).getReg()) |
| // composite to insert into |
| .addUse(I.getOperand(2).getReg()); |
| for (unsigned i = 4; i < I.getNumOperands(); i++) |
| MIB.addImm(foldImm(I.getOperand(i), MRI)); |
| return MIB.constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectExtractVal(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| MachineBasicBlock &BB = *I.getParent(); |
| auto MIB = BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpCompositeExtract)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .addUse(I.getOperand(2).getReg()); |
| for (unsigned i = 3; i < I.getNumOperands(); i++) |
| MIB.addImm(foldImm(I.getOperand(i), MRI)); |
| return MIB.constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectInsertElt(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| if (isImm(I.getOperand(4), MRI)) |
| return selectInsertVal(ResVReg, ResType, I); |
| MachineBasicBlock &BB = *I.getParent(); |
| return BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpVectorInsertDynamic)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .addUse(I.getOperand(2).getReg()) |
| .addUse(I.getOperand(3).getReg()) |
| .addUse(I.getOperand(4).getReg()) |
| .constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectExtractElt(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| if (isImm(I.getOperand(3), MRI)) |
| return selectExtractVal(ResVReg, ResType, I); |
| MachineBasicBlock &BB = *I.getParent(); |
| return BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpVectorExtractDynamic)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .addUse(I.getOperand(2).getReg()) |
| .addUse(I.getOperand(3).getReg()) |
| .constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectGEP(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| // In general we should also support OpAccessChain instrs here (i.e. not |
| // PtrAccessChain) but SPIRV-LLVM Translator doesn't emit them at all and so |
| // do we to stay compliant with its test and more importantly consumers. |
| unsigned Opcode = I.getOperand(2).getImm() ? SPIRV::OpInBoundsPtrAccessChain |
| : SPIRV::OpPtrAccessChain; |
| auto Res = BuildMI(*I.getParent(), I, I.getDebugLoc(), TII.get(Opcode)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| // Object to get a pointer to. |
| .addUse(I.getOperand(3).getReg()); |
| // Adding indices. |
| for (unsigned i = 4; i < I.getNumExplicitOperands(); ++i) |
| Res.addUse(I.getOperand(i).getReg()); |
| return Res.constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectIntrinsic(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| MachineBasicBlock &BB = *I.getParent(); |
| switch (I.getIntrinsicID()) { |
| case Intrinsic::spv_load: |
| return selectLoad(ResVReg, ResType, I); |
| break; |
| case Intrinsic::spv_store: |
| return selectStore(I); |
| break; |
| case Intrinsic::spv_extractv: |
| return selectExtractVal(ResVReg, ResType, I); |
| break; |
| case Intrinsic::spv_insertv: |
| return selectInsertVal(ResVReg, ResType, I); |
| break; |
| case Intrinsic::spv_extractelt: |
| return selectExtractElt(ResVReg, ResType, I); |
| break; |
| case Intrinsic::spv_insertelt: |
| return selectInsertElt(ResVReg, ResType, I); |
| break; |
| case Intrinsic::spv_gep: |
| return selectGEP(ResVReg, ResType, I); |
| break; |
| case Intrinsic::spv_unref_global: |
| case Intrinsic::spv_init_global: { |
| MachineInstr *MI = MRI->getVRegDef(I.getOperand(1).getReg()); |
| MachineInstr *Init = I.getNumExplicitOperands() > 2 |
| ? MRI->getVRegDef(I.getOperand(2).getReg()) |
| : nullptr; |
| assert(MI); |
| return selectGlobalValue(MI->getOperand(0).getReg(), *MI, Init); |
| } break; |
| case Intrinsic::spv_const_composite: { |
| // If no values are attached, the composite is null constant. |
| bool IsNull = I.getNumExplicitDefs() + 1 == I.getNumExplicitOperands(); |
| unsigned Opcode = |
| IsNull ? SPIRV::OpConstantNull : SPIRV::OpConstantComposite; |
| auto MIB = BuildMI(BB, I, I.getDebugLoc(), TII.get(Opcode)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)); |
| // skip type MD node we already used when generated assign.type for this |
| if (!IsNull) { |
| for (unsigned i = I.getNumExplicitDefs() + 1; |
| i < I.getNumExplicitOperands(); ++i) { |
| MIB.addUse(I.getOperand(i).getReg()); |
| } |
| } |
| return MIB.constrainAllUses(TII, TRI, RBI); |
| } break; |
| case Intrinsic::spv_assign_name: { |
| auto MIB = BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpName)); |
| MIB.addUse(I.getOperand(I.getNumExplicitDefs() + 1).getReg()); |
| for (unsigned i = I.getNumExplicitDefs() + 2; |
| i < I.getNumExplicitOperands(); ++i) { |
| MIB.addImm(I.getOperand(i).getImm()); |
| } |
| return MIB.constrainAllUses(TII, TRI, RBI); |
| } break; |
| case Intrinsic::spv_switch: { |
| auto MIB = BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpSwitch)); |
| for (unsigned i = 1; i < I.getNumExplicitOperands(); ++i) { |
| if (I.getOperand(i).isReg()) |
| MIB.addReg(I.getOperand(i).getReg()); |
| else if (I.getOperand(i).isCImm()) |
| addNumImm(I.getOperand(i).getCImm()->getValue(), MIB); |
| else if (I.getOperand(i).isMBB()) |
| MIB.addMBB(I.getOperand(i).getMBB()); |
| else |
| llvm_unreachable("Unexpected OpSwitch operand"); |
| } |
| return MIB.constrainAllUses(TII, TRI, RBI); |
| } break; |
| case Intrinsic::spv_cmpxchg: |
| return selectAtomicCmpXchg(ResVReg, ResType, I); |
| break; |
| case Intrinsic::spv_unreachable: |
| BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpUnreachable)); |
| break; |
| case Intrinsic::spv_alloca: |
| return selectFrameIndex(ResVReg, ResType, I); |
| break; |
| default: |
| llvm_unreachable("Intrinsic selection not implemented"); |
| } |
| return true; |
| } |
| |
| bool SPIRVInstructionSelector::selectFrameIndex(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| return BuildMI(*I.getParent(), I, I.getDebugLoc(), TII.get(SPIRV::OpVariable)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .addImm(static_cast<uint32_t>(SPIRV::StorageClass::Function)) |
| .constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectBranch(MachineInstr &I) const { |
| // InstructionSelector walks backwards through the instructions. We can use |
| // both a G_BR and a G_BRCOND to create an OpBranchConditional. We hit G_BR |
| // first, so can generate an OpBranchConditional here. If there is no |
| // G_BRCOND, we just use OpBranch for a regular unconditional branch. |
| const MachineInstr *PrevI = I.getPrevNode(); |
| MachineBasicBlock &MBB = *I.getParent(); |
| if (PrevI != nullptr && PrevI->getOpcode() == TargetOpcode::G_BRCOND) { |
| return BuildMI(MBB, I, I.getDebugLoc(), TII.get(SPIRV::OpBranchConditional)) |
| .addUse(PrevI->getOperand(0).getReg()) |
| .addMBB(PrevI->getOperand(1).getMBB()) |
| .addMBB(I.getOperand(0).getMBB()) |
| .constrainAllUses(TII, TRI, RBI); |
| } |
| return BuildMI(MBB, I, I.getDebugLoc(), TII.get(SPIRV::OpBranch)) |
| .addMBB(I.getOperand(0).getMBB()) |
| .constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectBranchCond(MachineInstr &I) const { |
| // InstructionSelector walks backwards through the instructions. For an |
| // explicit conditional branch with no fallthrough, we use both a G_BR and a |
| // G_BRCOND to create an OpBranchConditional. We should hit G_BR first, and |
| // generate the OpBranchConditional in selectBranch above. |
| // |
| // If an OpBranchConditional has been generated, we simply return, as the work |
| // is alread done. If there is no OpBranchConditional, LLVM must be relying on |
| // implicit fallthrough to the next basic block, so we need to create an |
| // OpBranchConditional with an explicit "false" argument pointing to the next |
| // basic block that LLVM would fall through to. |
| const MachineInstr *NextI = I.getNextNode(); |
| // Check if this has already been successfully selected. |
| if (NextI != nullptr && NextI->getOpcode() == SPIRV::OpBranchConditional) |
| return true; |
| // Must be relying on implicit block fallthrough, so generate an |
| // OpBranchConditional with the "next" basic block as the "false" target. |
| MachineBasicBlock &MBB = *I.getParent(); |
| unsigned NextMBBNum = MBB.getNextNode()->getNumber(); |
| MachineBasicBlock *NextMBB = I.getMF()->getBlockNumbered(NextMBBNum); |
| return BuildMI(MBB, I, I.getDebugLoc(), TII.get(SPIRV::OpBranchConditional)) |
| .addUse(I.getOperand(0).getReg()) |
| .addMBB(I.getOperand(1).getMBB()) |
| .addMBB(NextMBB) |
| .constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectPhi(Register ResVReg, |
| const SPIRVType *ResType, |
| MachineInstr &I) const { |
| auto MIB = BuildMI(*I.getParent(), I, I.getDebugLoc(), TII.get(SPIRV::OpPhi)) |
| .addDef(ResVReg) |
| .addUse(GR.getSPIRVTypeID(ResType)); |
| const unsigned NumOps = I.getNumOperands(); |
| for (unsigned i = 1; i < NumOps; i += 2) { |
| MIB.addUse(I.getOperand(i + 0).getReg()); |
| MIB.addMBB(I.getOperand(i + 1).getMBB()); |
| } |
| return MIB.constrainAllUses(TII, TRI, RBI); |
| } |
| |
| bool SPIRVInstructionSelector::selectGlobalValue( |
| Register ResVReg, MachineInstr &I, const MachineInstr *Init) const { |
| // FIXME: don't use MachineIRBuilder here, replace it with BuildMI. |
| MachineIRBuilder MIRBuilder(I); |
| const GlobalValue *GV = I.getOperand(1).getGlobal(); |
| SPIRVType *ResType = GR.getOrCreateSPIRVType( |
| GV->getType(), MIRBuilder, SPIRV::AccessQualifier::ReadWrite, false); |
| |
| std::string GlobalIdent = GV->getGlobalIdentifier(); |
| // We have functions as operands in tests with blocks of instruction e.g. in |
| // transcoding/global_block.ll. These operands are not used and should be |
| // substituted by zero constants. Their type is expected to be always |
| // OpTypePointer Function %uchar. |
| if (isa<Function>(GV)) { |
| const Constant *ConstVal = GV; |
| MachineBasicBlock &BB = *I.getParent(); |
| Register NewReg = GR.find(ConstVal, GR.CurMF); |
| if (!NewReg.isValid()) { |
| SPIRVType *SpvBaseTy = GR.getOrCreateSPIRVIntegerType(8, I, TII); |
| ResType = GR.getOrCreateSPIRVPointerType(SpvBaseTy, I, TII); |
| Register NewReg = ResVReg; |
| GR.add(ConstVal, GR.CurMF, NewReg); |
| return BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpConstantNull)) |
| .addDef(NewReg) |
| .addUse(GR.getSPIRVTypeID(ResType)) |
| .constrainAllUses(TII, TRI, RBI); |
| } |
| assert(NewReg != ResVReg); |
| return BuildMI(BB, I, I.getDebugLoc(), TII.get(TargetOpcode::COPY)) |
| .addDef(ResVReg) |
| .addUse(NewReg) |
| .constrainAllUses(TII, TRI, RBI); |
| } |
| auto GlobalVar = cast<GlobalVariable>(GV); |
| assert(GlobalVar->getName() != "llvm.global.annotations"); |
| |
| bool HasInit = GlobalVar->hasInitializer() && |
| !isa<UndefValue>(GlobalVar->getInitializer()); |
| // Skip empty declaration for GVs with initilaizers till we get the decl with |
| // passed initializer. |
| if (HasInit && !Init) |
| return true; |
| |
| unsigned AddrSpace = GV->getAddressSpace(); |
| SPIRV::StorageClass::StorageClass Storage = |
| addressSpaceToStorageClass(AddrSpace); |
| bool HasLnkTy = GV->getLinkage() != GlobalValue::InternalLinkage && |
| Storage != SPIRV::StorageClass::Function; |
| SPIRV::LinkageType::LinkageType LnkType = |
| (GV->isDeclaration() || GV->hasAvailableExternallyLinkage()) |
| ? SPIRV::LinkageType::Import |
| : SPIRV::LinkageType::Export; |
| |
| Register Reg = GR.buildGlobalVariable(ResVReg, ResType, GlobalIdent, GV, |
| Storage, Init, GlobalVar->isConstant(), |
| HasLnkTy, LnkType, MIRBuilder, true); |
| return Reg.isValid(); |
| } |
| |
| namespace llvm { |
| InstructionSelector * |
| createSPIRVInstructionSelector(const SPIRVTargetMachine &TM, |
| const SPIRVSubtarget &Subtarget, |
| const RegisterBankInfo &RBI) { |
| return new SPIRVInstructionSelector(TM, Subtarget, RBI); |
| } |
| } // namespace llvm |
