| //===-- AMDGPUISelDAGToDAG.cpp - A dag to dag inst selector for AMDGPU ----===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //==-----------------------------------------------------------------------===// |
| // |
| /// \file |
| /// \brief Defines an instruction selector for the AMDGPU target. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "AMDGPU.h" |
| #include "AMDGPUInstrInfo.h" |
| #include "AMDGPURegisterInfo.h" |
| #include "AMDGPUISelLowering.h" // For AMDGPUISD |
| #include "AMDGPUSubtarget.h" |
| #include "SIDefines.h" |
| #include "SIInstrInfo.h" |
| #include "SIRegisterInfo.h" |
| #include "SIISelLowering.h" |
| #include "SIMachineFunctionInfo.h" |
| #include "llvm/ADT/APInt.h" |
| #include "llvm/ADT/SmallVector.h" |
| #include "llvm/ADT/StringRef.h" |
| #include "llvm/Analysis/ValueTracking.h" |
| #include "llvm/CodeGen/FunctionLoweringInfo.h" |
| #include "llvm/CodeGen/ISDOpcodes.h" |
| #include "llvm/CodeGen/MachineFunction.h" |
| #include "llvm/CodeGen/MachineRegisterInfo.h" |
| #include "llvm/CodeGen/MachineValueType.h" |
| #include "llvm/CodeGen/SelectionDAG.h" |
| #include "llvm/CodeGen/SelectionDAGISel.h" |
| #include "llvm/CodeGen/SelectionDAGNodes.h" |
| #include "llvm/CodeGen/ValueTypes.h" |
| #include "llvm/IR/BasicBlock.h" |
| #include "llvm/IR/Instruction.h" |
| #include "llvm/MC/MCInstrDesc.h" |
| #include "llvm/Support/Casting.h" |
| #include "llvm/Support/CodeGen.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Support/MathExtras.h" |
| #include <cassert> |
| #include <cstdint> |
| #include <new> |
| #include <vector> |
| |
| using namespace llvm; |
| |
| namespace llvm { |
| |
| class R600InstrInfo; |
| |
| } // end namespace llvm |
| |
| //===----------------------------------------------------------------------===// |
| // Instruction Selector Implementation |
| //===----------------------------------------------------------------------===// |
| |
| namespace { |
| |
| /// AMDGPU specific code to select AMDGPU machine instructions for |
| /// SelectionDAG operations. |
| class AMDGPUDAGToDAGISel : public SelectionDAGISel { |
| // Subtarget - Keep a pointer to the AMDGPU Subtarget around so that we can |
| // make the right decision when generating code for different targets. |
| const AMDGPUSubtarget *Subtarget; |
| AMDGPUAS AMDGPUASI; |
| |
| public: |
| explicit AMDGPUDAGToDAGISel(TargetMachine &TM, CodeGenOpt::Level OptLevel) |
| : SelectionDAGISel(TM, OptLevel){ |
| AMDGPUASI = AMDGPU::getAMDGPUAS(TM); |
| } |
| ~AMDGPUDAGToDAGISel() override = default; |
| |
| bool runOnMachineFunction(MachineFunction &MF) override; |
| void Select(SDNode *N) override; |
| StringRef getPassName() const override; |
| void PostprocessISelDAG() override; |
| |
| private: |
| SDValue foldFrameIndex(SDValue N) const; |
| bool isNoNanSrc(SDValue N) const; |
| bool isInlineImmediate(const SDNode *N) const; |
| bool FoldOperand(SDValue &Src, SDValue &Sel, SDValue &Neg, SDValue &Abs, |
| const R600InstrInfo *TII); |
| bool FoldOperands(unsigned, const R600InstrInfo *, std::vector<SDValue> &); |
| bool FoldDotOperands(unsigned, const R600InstrInfo *, std::vector<SDValue> &); |
| |
| bool isConstantLoad(const MemSDNode *N, int cbID) const; |
| bool isUniformBr(const SDNode *N) const; |
| |
| SDNode *glueCopyToM0(SDNode *N) const; |
| |
| const TargetRegisterClass *getOperandRegClass(SDNode *N, unsigned OpNo) const; |
| bool SelectGlobalValueConstantOffset(SDValue Addr, SDValue& IntPtr); |
| bool SelectGlobalValueVariableOffset(SDValue Addr, SDValue &BaseReg, |
| SDValue& Offset); |
| bool SelectADDRVTX_READ(SDValue Addr, SDValue &Base, SDValue &Offset); |
| bool SelectADDRIndirect(SDValue Addr, SDValue &Base, SDValue &Offset); |
| bool isDSOffsetLegal(const SDValue &Base, unsigned Offset, |
| unsigned OffsetBits) const; |
| bool SelectDS1Addr1Offset(SDValue Ptr, SDValue &Base, SDValue &Offset) const; |
| bool SelectDS64Bit4ByteAligned(SDValue Ptr, SDValue &Base, SDValue &Offset0, |
| SDValue &Offset1) const; |
| bool SelectMUBUF(SDValue Addr, SDValue &SRsrc, SDValue &VAddr, |
| SDValue &SOffset, SDValue &Offset, SDValue &Offen, |
| SDValue &Idxen, SDValue &Addr64, SDValue &GLC, SDValue &SLC, |
| SDValue &TFE) const; |
| bool SelectMUBUFAddr64(SDValue Addr, SDValue &SRsrc, SDValue &VAddr, |
| SDValue &SOffset, SDValue &Offset, SDValue &GLC, |
| SDValue &SLC, SDValue &TFE) const; |
| bool SelectMUBUFAddr64(SDValue Addr, SDValue &SRsrc, |
| SDValue &VAddr, SDValue &SOffset, SDValue &Offset, |
| SDValue &SLC) const; |
| bool SelectMUBUFScratchOffen(SDValue Addr, SDValue &RSrc, SDValue &VAddr, |
| SDValue &SOffset, SDValue &ImmOffset) const; |
| bool SelectMUBUFScratchOffset(SDValue Addr, SDValue &SRsrc, SDValue &Soffset, |
| SDValue &Offset) const; |
| |
| bool SelectMUBUFOffset(SDValue Addr, SDValue &SRsrc, SDValue &SOffset, |
| SDValue &Offset, SDValue &GLC, SDValue &SLC, |
| SDValue &TFE) const; |
| bool SelectMUBUFOffset(SDValue Addr, SDValue &SRsrc, SDValue &Soffset, |
| SDValue &Offset, SDValue &SLC) const; |
| bool SelectMUBUFOffset(SDValue Addr, SDValue &SRsrc, SDValue &Soffset, |
| SDValue &Offset) const; |
| bool SelectMUBUFConstant(SDValue Constant, |
| SDValue &SOffset, |
| SDValue &ImmOffset) const; |
| bool SelectMUBUFIntrinsicOffset(SDValue Offset, SDValue &SOffset, |
| SDValue &ImmOffset) const; |
| bool SelectMUBUFIntrinsicVOffset(SDValue Offset, SDValue &SOffset, |
| SDValue &ImmOffset, SDValue &VOffset) const; |
| |
| bool SelectFlat(SDValue Addr, SDValue &VAddr, |
| SDValue &SLC, SDValue &TFE) const; |
| |
| bool SelectSMRDOffset(SDValue ByteOffsetNode, SDValue &Offset, |
| bool &Imm) const; |
| bool SelectSMRD(SDValue Addr, SDValue &SBase, SDValue &Offset, |
| bool &Imm) const; |
| bool SelectSMRDImm(SDValue Addr, SDValue &SBase, SDValue &Offset) const; |
| bool SelectSMRDImm32(SDValue Addr, SDValue &SBase, SDValue &Offset) const; |
| bool SelectSMRDSgpr(SDValue Addr, SDValue &SBase, SDValue &Offset) const; |
| bool SelectSMRDBufferImm(SDValue Addr, SDValue &Offset) const; |
| bool SelectSMRDBufferImm32(SDValue Addr, SDValue &Offset) const; |
| bool SelectSMRDBufferSgpr(SDValue Addr, SDValue &Offset) const; |
| bool SelectMOVRELOffset(SDValue Index, SDValue &Base, SDValue &Offset) const; |
| |
| bool SelectVOP3Mods_NNaN(SDValue In, SDValue &Src, SDValue &SrcMods) const; |
| bool SelectVOP3Mods(SDValue In, SDValue &Src, SDValue &SrcMods) const; |
| bool SelectVOP3NoMods(SDValue In, SDValue &Src, SDValue &SrcMods) const; |
| bool SelectVOP3Mods0(SDValue In, SDValue &Src, SDValue &SrcMods, |
| SDValue &Clamp, SDValue &Omod) const; |
| bool SelectVOP3NoMods0(SDValue In, SDValue &Src, SDValue &SrcMods, |
| SDValue &Clamp, SDValue &Omod) const; |
| |
| bool SelectVOP3Mods0Clamp(SDValue In, SDValue &Src, SDValue &SrcMods, |
| SDValue &Omod) const; |
| bool SelectVOP3Mods0Clamp0OMod(SDValue In, SDValue &Src, SDValue &SrcMods, |
| SDValue &Clamp, |
| SDValue &Omod) const; |
| |
| bool SelectVOP3OMods(SDValue In, SDValue &Src, |
| SDValue &Clamp, SDValue &Omod) const; |
| |
| bool SelectVOP3PMods(SDValue In, SDValue &Src, SDValue &SrcMods) const; |
| bool SelectVOP3PMods0(SDValue In, SDValue &Src, SDValue &SrcMods, |
| SDValue &Clamp) const; |
| |
| void SelectADD_SUB_I64(SDNode *N); |
| void SelectUADDO_USUBO(SDNode *N); |
| void SelectDIV_SCALE(SDNode *N); |
| void SelectFMA_W_CHAIN(SDNode *N); |
| void SelectFMUL_W_CHAIN(SDNode *N); |
| |
| SDNode *getS_BFE(unsigned Opcode, const SDLoc &DL, SDValue Val, |
| uint32_t Offset, uint32_t Width); |
| void SelectS_BFEFromShifts(SDNode *N); |
| void SelectS_BFE(SDNode *N); |
| bool isCBranchSCC(const SDNode *N) const; |
| void SelectBRCOND(SDNode *N); |
| void SelectATOMIC_CMP_SWAP(SDNode *N); |
| |
| // Include the pieces autogenerated from the target description. |
| #include "AMDGPUGenDAGISel.inc" |
| }; |
| |
| } // end anonymous namespace |
| |
| /// \brief This pass converts a legalized DAG into a AMDGPU-specific |
| // DAG, ready for instruction scheduling. |
| FunctionPass *llvm::createAMDGPUISelDag(TargetMachine &TM, |
| CodeGenOpt::Level OptLevel) { |
| return new AMDGPUDAGToDAGISel(TM, OptLevel); |
| } |
| |
| bool AMDGPUDAGToDAGISel::runOnMachineFunction(MachineFunction &MF) { |
| Subtarget = &MF.getSubtarget<AMDGPUSubtarget>(); |
| return SelectionDAGISel::runOnMachineFunction(MF); |
| } |
| |
| bool AMDGPUDAGToDAGISel::isNoNanSrc(SDValue N) const { |
| if (TM.Options.NoNaNsFPMath) |
| return true; |
| |
| // TODO: Move into isKnownNeverNaN |
| if (const auto *BO = dyn_cast<BinaryWithFlagsSDNode>(N)) |
| return BO->Flags.hasNoNaNs(); |
| |
| return CurDAG->isKnownNeverNaN(N); |
| } |
| |
| bool AMDGPUDAGToDAGISel::isInlineImmediate(const SDNode *N) const { |
| const SIInstrInfo *TII |
| = static_cast<const SISubtarget *>(Subtarget)->getInstrInfo(); |
| |
| if (const ConstantSDNode *C = dyn_cast<ConstantSDNode>(N)) |
| return TII->isInlineConstant(C->getAPIntValue()); |
| |
| if (const ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N)) |
| return TII->isInlineConstant(C->getValueAPF().bitcastToAPInt()); |
| |
| return false; |
| } |
| |
| /// \brief Determine the register class for \p OpNo |
| /// \returns The register class of the virtual register that will be used for |
| /// the given operand number \OpNo or NULL if the register class cannot be |
| /// determined. |
| const TargetRegisterClass *AMDGPUDAGToDAGISel::getOperandRegClass(SDNode *N, |
| unsigned OpNo) const { |
| if (!N->isMachineOpcode()) { |
| if (N->getOpcode() == ISD::CopyToReg) { |
| unsigned Reg = cast<RegisterSDNode>(N->getOperand(1))->getReg(); |
| if (TargetRegisterInfo::isVirtualRegister(Reg)) { |
| MachineRegisterInfo &MRI = CurDAG->getMachineFunction().getRegInfo(); |
| return MRI.getRegClass(Reg); |
| } |
| |
| const SIRegisterInfo *TRI |
| = static_cast<const SISubtarget *>(Subtarget)->getRegisterInfo(); |
| return TRI->getPhysRegClass(Reg); |
| } |
| |
| return nullptr; |
| } |
| |
| switch (N->getMachineOpcode()) { |
| default: { |
| const MCInstrDesc &Desc = |
| Subtarget->getInstrInfo()->get(N->getMachineOpcode()); |
| unsigned OpIdx = Desc.getNumDefs() + OpNo; |
| if (OpIdx >= Desc.getNumOperands()) |
| return nullptr; |
| int RegClass = Desc.OpInfo[OpIdx].RegClass; |
| if (RegClass == -1) |
| return nullptr; |
| |
| return Subtarget->getRegisterInfo()->getRegClass(RegClass); |
| } |
| case AMDGPU::REG_SEQUENCE: { |
| unsigned RCID = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue(); |
| const TargetRegisterClass *SuperRC = |
| Subtarget->getRegisterInfo()->getRegClass(RCID); |
| |
| SDValue SubRegOp = N->getOperand(OpNo + 1); |
| unsigned SubRegIdx = cast<ConstantSDNode>(SubRegOp)->getZExtValue(); |
| return Subtarget->getRegisterInfo()->getSubClassWithSubReg(SuperRC, |
| SubRegIdx); |
| } |
| } |
| } |
| |
| SDNode *AMDGPUDAGToDAGISel::glueCopyToM0(SDNode *N) const { |
| if (Subtarget->getGeneration() < AMDGPUSubtarget::SOUTHERN_ISLANDS || |
| cast<MemSDNode>(N)->getAddressSpace() != AMDGPUASI.LOCAL_ADDRESS) |
| return N; |
| |
| const SITargetLowering& Lowering = |
| *static_cast<const SITargetLowering*>(getTargetLowering()); |
| |
| // Write max value to m0 before each load operation |
| |
| SDValue M0 = Lowering.copyToM0(*CurDAG, CurDAG->getEntryNode(), SDLoc(N), |
| CurDAG->getTargetConstant(-1, SDLoc(N), MVT::i32)); |
| |
| SDValue Glue = M0.getValue(1); |
| |
| SmallVector <SDValue, 8> Ops; |
| for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) { |
| Ops.push_back(N->getOperand(i)); |
| } |
| Ops.push_back(Glue); |
| CurDAG->MorphNodeTo(N, N->getOpcode(), N->getVTList(), Ops); |
| |
| return N; |
| } |
| |
| static unsigned selectSGPRVectorRegClassID(unsigned NumVectorElts) { |
| switch (NumVectorElts) { |
| case 1: |
| return AMDGPU::SReg_32_XM0RegClassID; |
| case 2: |
| return AMDGPU::SReg_64RegClassID; |
| case 4: |
| return AMDGPU::SReg_128RegClassID; |
| case 8: |
| return AMDGPU::SReg_256RegClassID; |
| case 16: |
| return AMDGPU::SReg_512RegClassID; |
| } |
| |
| llvm_unreachable("invalid vector size"); |
| } |
| |
| static bool getConstantValue(SDValue N, uint32_t &Out) { |
| if (const ConstantSDNode *C = dyn_cast<ConstantSDNode>(N)) { |
| Out = C->getAPIntValue().getZExtValue(); |
| return true; |
| } |
| |
| if (const ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N)) { |
| Out = C->getValueAPF().bitcastToAPInt().getZExtValue(); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| void AMDGPUDAGToDAGISel::Select(SDNode *N) { |
| unsigned int Opc = N->getOpcode(); |
| if (N->isMachineOpcode()) { |
| N->setNodeId(-1); |
| return; // Already selected. |
| } |
| |
| if (isa<AtomicSDNode>(N) || |
| (Opc == AMDGPUISD::ATOMIC_INC || Opc == AMDGPUISD::ATOMIC_DEC)) |
| N = glueCopyToM0(N); |
| |
| switch (Opc) { |
| default: break; |
| // We are selecting i64 ADD here instead of custom lower it during |
| // DAG legalization, so we can fold some i64 ADDs used for address |
| // calculation into the LOAD and STORE instructions. |
| case ISD::ADD: |
| case ISD::ADDC: |
| case ISD::ADDE: |
| case ISD::SUB: |
| case ISD::SUBC: |
| case ISD::SUBE: { |
| if (N->getValueType(0) != MVT::i64 || |
| Subtarget->getGeneration() < AMDGPUSubtarget::SOUTHERN_ISLANDS) |
| break; |
| |
| SelectADD_SUB_I64(N); |
| return; |
| } |
| case ISD::UADDO: |
| case ISD::USUBO: { |
| SelectUADDO_USUBO(N); |
| return; |
| } |
| case AMDGPUISD::FMUL_W_CHAIN: { |
| SelectFMUL_W_CHAIN(N); |
| return; |
| } |
| case AMDGPUISD::FMA_W_CHAIN: { |
| SelectFMA_W_CHAIN(N); |
| return; |
| } |
| |
| case ISD::SCALAR_TO_VECTOR: |
| case AMDGPUISD::BUILD_VERTICAL_VECTOR: |
| case ISD::BUILD_VECTOR: { |
| unsigned RegClassID; |
| const AMDGPURegisterInfo *TRI = Subtarget->getRegisterInfo(); |
| EVT VT = N->getValueType(0); |
| unsigned NumVectorElts = VT.getVectorNumElements(); |
| EVT EltVT = VT.getVectorElementType(); |
| |
| if (VT == MVT::v2i16 || VT == MVT::v2f16) { |
| if (Opc == ISD::BUILD_VECTOR) { |
| uint32_t LHSVal, RHSVal; |
| if (getConstantValue(N->getOperand(0), LHSVal) && |
| getConstantValue(N->getOperand(1), RHSVal)) { |
| uint32_t K = LHSVal | (RHSVal << 16); |
| CurDAG->SelectNodeTo(N, AMDGPU::S_MOV_B32, VT, |
| CurDAG->getTargetConstant(K, SDLoc(N), MVT::i32)); |
| return; |
| } |
| } |
| |
| break; |
| } |
| |
| assert(EltVT.bitsEq(MVT::i32)); |
| |
| if (Subtarget->getGeneration() >= AMDGPUSubtarget::SOUTHERN_ISLANDS) { |
| RegClassID = selectSGPRVectorRegClassID(NumVectorElts); |
| } else { |
| // BUILD_VECTOR was lowered into an IMPLICIT_DEF + 4 INSERT_SUBREG |
| // that adds a 128 bits reg copy when going through TwoAddressInstructions |
| // pass. We want to avoid 128 bits copies as much as possible because they |
| // can't be bundled by our scheduler. |
| switch(NumVectorElts) { |
| case 2: RegClassID = AMDGPU::R600_Reg64RegClassID; break; |
| case 4: |
| if (Opc == AMDGPUISD::BUILD_VERTICAL_VECTOR) |
| RegClassID = AMDGPU::R600_Reg128VerticalRegClassID; |
| else |
| RegClassID = AMDGPU::R600_Reg128RegClassID; |
| break; |
| default: llvm_unreachable("Do not know how to lower this BUILD_VECTOR"); |
| } |
| } |
| |
| SDLoc DL(N); |
| SDValue RegClass = CurDAG->getTargetConstant(RegClassID, DL, MVT::i32); |
| |
| if (NumVectorElts == 1) { |
| CurDAG->SelectNodeTo(N, AMDGPU::COPY_TO_REGCLASS, EltVT, N->getOperand(0), |
| RegClass); |
| return; |
| } |
| |
| assert(NumVectorElts <= 16 && "Vectors with more than 16 elements not " |
| "supported yet"); |
| // 16 = Max Num Vector Elements |
| // 2 = 2 REG_SEQUENCE operands per element (value, subreg index) |
| // 1 = Vector Register Class |
| SmallVector<SDValue, 16 * 2 + 1> RegSeqArgs(NumVectorElts * 2 + 1); |
| |
| RegSeqArgs[0] = CurDAG->getTargetConstant(RegClassID, DL, MVT::i32); |
| bool IsRegSeq = true; |
| unsigned NOps = N->getNumOperands(); |
| for (unsigned i = 0; i < NOps; i++) { |
| // XXX: Why is this here? |
| if (isa<RegisterSDNode>(N->getOperand(i))) { |
| IsRegSeq = false; |
| break; |
| } |
| RegSeqArgs[1 + (2 * i)] = N->getOperand(i); |
| RegSeqArgs[1 + (2 * i) + 1] = |
| CurDAG->getTargetConstant(TRI->getSubRegFromChannel(i), DL, |
| MVT::i32); |
| } |
| |
| if (NOps != NumVectorElts) { |
| // Fill in the missing undef elements if this was a scalar_to_vector. |
| assert(Opc == ISD::SCALAR_TO_VECTOR && NOps < NumVectorElts); |
| |
| MachineSDNode *ImpDef = CurDAG->getMachineNode(TargetOpcode::IMPLICIT_DEF, |
| DL, EltVT); |
| for (unsigned i = NOps; i < NumVectorElts; ++i) { |
| RegSeqArgs[1 + (2 * i)] = SDValue(ImpDef, 0); |
| RegSeqArgs[1 + (2 * i) + 1] = |
| CurDAG->getTargetConstant(TRI->getSubRegFromChannel(i), DL, MVT::i32); |
| } |
| } |
| |
| if (!IsRegSeq) |
| break; |
| CurDAG->SelectNodeTo(N, AMDGPU::REG_SEQUENCE, N->getVTList(), RegSeqArgs); |
| return; |
| } |
| case ISD::BUILD_PAIR: { |
| SDValue RC, SubReg0, SubReg1; |
| if (Subtarget->getGeneration() <= AMDGPUSubtarget::NORTHERN_ISLANDS) { |
| break; |
| } |
| SDLoc DL(N); |
| if (N->getValueType(0) == MVT::i128) { |
| RC = CurDAG->getTargetConstant(AMDGPU::SReg_128RegClassID, DL, MVT::i32); |
| SubReg0 = CurDAG->getTargetConstant(AMDGPU::sub0_sub1, DL, MVT::i32); |
| SubReg1 = CurDAG->getTargetConstant(AMDGPU::sub2_sub3, DL, MVT::i32); |
| } else if (N->getValueType(0) == MVT::i64) { |
| RC = CurDAG->getTargetConstant(AMDGPU::SReg_64RegClassID, DL, MVT::i32); |
| SubReg0 = CurDAG->getTargetConstant(AMDGPU::sub0, DL, MVT::i32); |
| SubReg1 = CurDAG->getTargetConstant(AMDGPU::sub1, DL, MVT::i32); |
| } else { |
| llvm_unreachable("Unhandled value type for BUILD_PAIR"); |
| } |
| const SDValue Ops[] = { RC, N->getOperand(0), SubReg0, |
| N->getOperand(1), SubReg1 }; |
| ReplaceNode(N, CurDAG->getMachineNode(TargetOpcode::REG_SEQUENCE, DL, |
| N->getValueType(0), Ops)); |
| return; |
| } |
| |
| case ISD::Constant: |
| case ISD::ConstantFP: { |
| if (Subtarget->getGeneration() < AMDGPUSubtarget::SOUTHERN_ISLANDS || |
| N->getValueType(0).getSizeInBits() != 64 || isInlineImmediate(N)) |
| break; |
| |
| uint64_t Imm; |
| if (ConstantFPSDNode *FP = dyn_cast<ConstantFPSDNode>(N)) |
| Imm = FP->getValueAPF().bitcastToAPInt().getZExtValue(); |
| else { |
| ConstantSDNode *C = cast<ConstantSDNode>(N); |
| Imm = C->getZExtValue(); |
| } |
| |
| SDLoc DL(N); |
| SDNode *Lo = CurDAG->getMachineNode(AMDGPU::S_MOV_B32, DL, MVT::i32, |
| CurDAG->getConstant(Imm & 0xFFFFFFFF, DL, |
| MVT::i32)); |
| SDNode *Hi = CurDAG->getMachineNode(AMDGPU::S_MOV_B32, DL, MVT::i32, |
| CurDAG->getConstant(Imm >> 32, DL, MVT::i32)); |
| const SDValue Ops[] = { |
| CurDAG->getTargetConstant(AMDGPU::SReg_64RegClassID, DL, MVT::i32), |
| SDValue(Lo, 0), CurDAG->getTargetConstant(AMDGPU::sub0, DL, MVT::i32), |
| SDValue(Hi, 0), CurDAG->getTargetConstant(AMDGPU::sub1, DL, MVT::i32) |
| }; |
| |
| ReplaceNode(N, CurDAG->getMachineNode(TargetOpcode::REG_SEQUENCE, DL, |
| N->getValueType(0), Ops)); |
| return; |
| } |
| case ISD::LOAD: |
| case ISD::STORE: { |
| N = glueCopyToM0(N); |
| break; |
| } |
| |
| case AMDGPUISD::BFE_I32: |
| case AMDGPUISD::BFE_U32: { |
| if (Subtarget->getGeneration() < AMDGPUSubtarget::SOUTHERN_ISLANDS) |
| break; |
| |
| // There is a scalar version available, but unlike the vector version which |
| // has a separate operand for the offset and width, the scalar version packs |
| // the width and offset into a single operand. Try to move to the scalar |
| // version if the offsets are constant, so that we can try to keep extended |
| // loads of kernel arguments in SGPRs. |
| |
| // TODO: Technically we could try to pattern match scalar bitshifts of |
| // dynamic values, but it's probably not useful. |
| ConstantSDNode *Offset = dyn_cast<ConstantSDNode>(N->getOperand(1)); |
| if (!Offset) |
| break; |
| |
| ConstantSDNode *Width = dyn_cast<ConstantSDNode>(N->getOperand(2)); |
| if (!Width) |
| break; |
| |
| bool Signed = Opc == AMDGPUISD::BFE_I32; |
| |
| uint32_t OffsetVal = Offset->getZExtValue(); |
| uint32_t WidthVal = Width->getZExtValue(); |
| |
| ReplaceNode(N, getS_BFE(Signed ? AMDGPU::S_BFE_I32 : AMDGPU::S_BFE_U32, |
| SDLoc(N), N->getOperand(0), OffsetVal, WidthVal)); |
| return; |
| } |
| case AMDGPUISD::DIV_SCALE: { |
| SelectDIV_SCALE(N); |
| return; |
| } |
| case ISD::CopyToReg: { |
| const SITargetLowering& Lowering = |
| *static_cast<const SITargetLowering*>(getTargetLowering()); |
| N = Lowering.legalizeTargetIndependentNode(N, *CurDAG); |
| break; |
| } |
| case ISD::AND: |
| case ISD::SRL: |
| case ISD::SRA: |
| case ISD::SIGN_EXTEND_INREG: |
| if (N->getValueType(0) != MVT::i32 || |
| Subtarget->getGeneration() < AMDGPUSubtarget::SOUTHERN_ISLANDS) |
| break; |
| |
| SelectS_BFE(N); |
| return; |
| case ISD::BRCOND: |
| SelectBRCOND(N); |
| return; |
| |
| case AMDGPUISD::ATOMIC_CMP_SWAP: |
| SelectATOMIC_CMP_SWAP(N); |
| return; |
| } |
| |
| SelectCode(N); |
| } |
| |
| bool AMDGPUDAGToDAGISel::isConstantLoad(const MemSDNode *N, int CbId) const { |
| if (!N->readMem()) |
| return false; |
| if (CbId == -1) |
| return N->getAddressSpace() == AMDGPUASI.CONSTANT_ADDRESS; |
| |
| return N->getAddressSpace() == AMDGPUASI.CONSTANT_BUFFER_0 + CbId; |
| } |
| |
| bool AMDGPUDAGToDAGISel::isUniformBr(const SDNode *N) const { |
| const BasicBlock *BB = FuncInfo->MBB->getBasicBlock(); |
| const Instruction *Term = BB->getTerminator(); |
| return Term->getMetadata("amdgpu.uniform") || |
| Term->getMetadata("structurizecfg.uniform"); |
| } |
| |
| StringRef AMDGPUDAGToDAGISel::getPassName() const { |
| return "AMDGPU DAG->DAG Pattern Instruction Selection"; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Complex Patterns |
| //===----------------------------------------------------------------------===// |
| |
| bool AMDGPUDAGToDAGISel::SelectGlobalValueConstantOffset(SDValue Addr, |
| SDValue& IntPtr) { |
| if (ConstantSDNode *Cst = dyn_cast<ConstantSDNode>(Addr)) { |
| IntPtr = CurDAG->getIntPtrConstant(Cst->getZExtValue() / 4, SDLoc(Addr), |
| true); |
| return true; |
| } |
| return false; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectGlobalValueVariableOffset(SDValue Addr, |
| SDValue& BaseReg, SDValue &Offset) { |
| if (!isa<ConstantSDNode>(Addr)) { |
| BaseReg = Addr; |
| Offset = CurDAG->getIntPtrConstant(0, SDLoc(Addr), true); |
| return true; |
| } |
| return false; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectADDRVTX_READ(SDValue Addr, SDValue &Base, |
| SDValue &Offset) { |
| ConstantSDNode *IMMOffset; |
| |
| if (Addr.getOpcode() == ISD::ADD |
| && (IMMOffset = dyn_cast<ConstantSDNode>(Addr.getOperand(1))) |
| && isInt<16>(IMMOffset->getZExtValue())) { |
| |
| Base = Addr.getOperand(0); |
| Offset = CurDAG->getTargetConstant(IMMOffset->getZExtValue(), SDLoc(Addr), |
| MVT::i32); |
| return true; |
| // If the pointer address is constant, we can move it to the offset field. |
| } else if ((IMMOffset = dyn_cast<ConstantSDNode>(Addr)) |
| && isInt<16>(IMMOffset->getZExtValue())) { |
| Base = CurDAG->getCopyFromReg(CurDAG->getEntryNode(), |
| SDLoc(CurDAG->getEntryNode()), |
| AMDGPU::ZERO, MVT::i32); |
| Offset = CurDAG->getTargetConstant(IMMOffset->getZExtValue(), SDLoc(Addr), |
| MVT::i32); |
| return true; |
| } |
| |
| // Default case, no offset |
| Base = Addr; |
| Offset = CurDAG->getTargetConstant(0, SDLoc(Addr), MVT::i32); |
| return true; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectADDRIndirect(SDValue Addr, SDValue &Base, |
| SDValue &Offset) { |
| ConstantSDNode *C; |
| SDLoc DL(Addr); |
| |
| if ((C = dyn_cast<ConstantSDNode>(Addr))) { |
| Base = CurDAG->getRegister(AMDGPU::INDIRECT_BASE_ADDR, MVT::i32); |
| Offset = CurDAG->getTargetConstant(C->getZExtValue(), DL, MVT::i32); |
| } else if ((Addr.getOpcode() == AMDGPUISD::DWORDADDR) && |
| (C = dyn_cast<ConstantSDNode>(Addr.getOperand(0)))) { |
| Base = CurDAG->getRegister(AMDGPU::INDIRECT_BASE_ADDR, MVT::i32); |
| Offset = CurDAG->getTargetConstant(C->getZExtValue(), DL, MVT::i32); |
| } else if ((Addr.getOpcode() == ISD::ADD || Addr.getOpcode() == ISD::OR) && |
| (C = dyn_cast<ConstantSDNode>(Addr.getOperand(1)))) { |
| Base = Addr.getOperand(0); |
| Offset = CurDAG->getTargetConstant(C->getZExtValue(), DL, MVT::i32); |
| } else { |
| Base = Addr; |
| Offset = CurDAG->getTargetConstant(0, DL, MVT::i32); |
| } |
| |
| return true; |
| } |
| |
| void AMDGPUDAGToDAGISel::SelectADD_SUB_I64(SDNode *N) { |
| SDLoc DL(N); |
| SDValue LHS = N->getOperand(0); |
| SDValue RHS = N->getOperand(1); |
| |
| unsigned Opcode = N->getOpcode(); |
| bool ConsumeCarry = (Opcode == ISD::ADDE || Opcode == ISD::SUBE); |
| bool ProduceCarry = |
| ConsumeCarry || Opcode == ISD::ADDC || Opcode == ISD::SUBC; |
| bool IsAdd = |
| (Opcode == ISD::ADD || Opcode == ISD::ADDC || Opcode == ISD::ADDE); |
| |
| SDValue Sub0 = CurDAG->getTargetConstant(AMDGPU::sub0, DL, MVT::i32); |
| SDValue Sub1 = CurDAG->getTargetConstant(AMDGPU::sub1, DL, MVT::i32); |
| |
| SDNode *Lo0 = CurDAG->getMachineNode(TargetOpcode::EXTRACT_SUBREG, |
| DL, MVT::i32, LHS, Sub0); |
| SDNode *Hi0 = CurDAG->getMachineNode(TargetOpcode::EXTRACT_SUBREG, |
| DL, MVT::i32, LHS, Sub1); |
| |
| SDNode *Lo1 = CurDAG->getMachineNode(TargetOpcode::EXTRACT_SUBREG, |
| DL, MVT::i32, RHS, Sub0); |
| SDNode *Hi1 = CurDAG->getMachineNode(TargetOpcode::EXTRACT_SUBREG, |
| DL, MVT::i32, RHS, Sub1); |
| |
| SDVTList VTList = CurDAG->getVTList(MVT::i32, MVT::Glue); |
| |
| unsigned Opc = IsAdd ? AMDGPU::S_ADD_U32 : AMDGPU::S_SUB_U32; |
| unsigned CarryOpc = IsAdd ? AMDGPU::S_ADDC_U32 : AMDGPU::S_SUBB_U32; |
| |
| SDNode *AddLo; |
| if (!ConsumeCarry) { |
| SDValue Args[] = { SDValue(Lo0, 0), SDValue(Lo1, 0) }; |
| AddLo = CurDAG->getMachineNode(Opc, DL, VTList, Args); |
| } else { |
| SDValue Args[] = { SDValue(Lo0, 0), SDValue(Lo1, 0), N->getOperand(2) }; |
| AddLo = CurDAG->getMachineNode(CarryOpc, DL, VTList, Args); |
| } |
| SDValue AddHiArgs[] = { |
| SDValue(Hi0, 0), |
| SDValue(Hi1, 0), |
| SDValue(AddLo, 1) |
| }; |
| SDNode *AddHi = CurDAG->getMachineNode(CarryOpc, DL, VTList, AddHiArgs); |
| |
| SDValue RegSequenceArgs[] = { |
| CurDAG->getTargetConstant(AMDGPU::SReg_64RegClassID, DL, MVT::i32), |
| SDValue(AddLo,0), |
| Sub0, |
| SDValue(AddHi,0), |
| Sub1, |
| }; |
| SDNode *RegSequence = CurDAG->getMachineNode(AMDGPU::REG_SEQUENCE, DL, |
| MVT::i64, RegSequenceArgs); |
| |
| if (ProduceCarry) { |
| // Replace the carry-use |
| CurDAG->ReplaceAllUsesOfValueWith(SDValue(N, 1), SDValue(AddHi, 1)); |
| } |
| |
| // Replace the remaining uses. |
| CurDAG->ReplaceAllUsesWith(N, RegSequence); |
| CurDAG->RemoveDeadNode(N); |
| } |
| |
| void AMDGPUDAGToDAGISel::SelectUADDO_USUBO(SDNode *N) { |
| // The name of the opcodes are misleading. v_add_i32/v_sub_i32 have unsigned |
| // carry out despite the _i32 name. These were renamed in VI to _U32. |
| // FIXME: We should probably rename the opcodes here. |
| unsigned Opc = N->getOpcode() == ISD::UADDO ? |
| AMDGPU::V_ADD_I32_e64 : AMDGPU::V_SUB_I32_e64; |
| |
| CurDAG->SelectNodeTo(N, Opc, N->getVTList(), |
| { N->getOperand(0), N->getOperand(1) }); |
| } |
| |
| void AMDGPUDAGToDAGISel::SelectFMA_W_CHAIN(SDNode *N) { |
| SDLoc SL(N); |
| // src0_modifiers, src0, src1_modifiers, src1, src2_modifiers, src2, clamp, omod |
| SDValue Ops[10]; |
| |
| SelectVOP3Mods0(N->getOperand(1), Ops[1], Ops[0], Ops[6], Ops[7]); |
| SelectVOP3Mods(N->getOperand(2), Ops[3], Ops[2]); |
| SelectVOP3Mods(N->getOperand(3), Ops[5], Ops[4]); |
| Ops[8] = N->getOperand(0); |
| Ops[9] = N->getOperand(4); |
| |
| CurDAG->SelectNodeTo(N, AMDGPU::V_FMA_F32, N->getVTList(), Ops); |
| } |
| |
| void AMDGPUDAGToDAGISel::SelectFMUL_W_CHAIN(SDNode *N) { |
| SDLoc SL(N); |
| // src0_modifiers, src0, src1_modifiers, src1, clamp, omod |
| SDValue Ops[8]; |
| |
| SelectVOP3Mods0(N->getOperand(1), Ops[1], Ops[0], Ops[4], Ops[5]); |
| SelectVOP3Mods(N->getOperand(2), Ops[3], Ops[2]); |
| Ops[6] = N->getOperand(0); |
| Ops[7] = N->getOperand(3); |
| |
| CurDAG->SelectNodeTo(N, AMDGPU::V_MUL_F32_e64, N->getVTList(), Ops); |
| } |
| |
| // We need to handle this here because tablegen doesn't support matching |
| // instructions with multiple outputs. |
| void AMDGPUDAGToDAGISel::SelectDIV_SCALE(SDNode *N) { |
| SDLoc SL(N); |
| EVT VT = N->getValueType(0); |
| |
| assert(VT == MVT::f32 || VT == MVT::f64); |
| |
| unsigned Opc |
| = (VT == MVT::f64) ? AMDGPU::V_DIV_SCALE_F64 : AMDGPU::V_DIV_SCALE_F32; |
| |
| SDValue Ops[] = { N->getOperand(0), N->getOperand(1), N->getOperand(2) }; |
| CurDAG->SelectNodeTo(N, Opc, N->getVTList(), Ops); |
| } |
| |
| bool AMDGPUDAGToDAGISel::isDSOffsetLegal(const SDValue &Base, unsigned Offset, |
| unsigned OffsetBits) const { |
| if ((OffsetBits == 16 && !isUInt<16>(Offset)) || |
| (OffsetBits == 8 && !isUInt<8>(Offset))) |
| return false; |
| |
| if (Subtarget->getGeneration() >= AMDGPUSubtarget::SEA_ISLANDS || |
| Subtarget->unsafeDSOffsetFoldingEnabled()) |
| return true; |
| |
| // On Southern Islands instruction with a negative base value and an offset |
| // don't seem to work. |
| return CurDAG->SignBitIsZero(Base); |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectDS1Addr1Offset(SDValue Addr, SDValue &Base, |
| SDValue &Offset) const { |
| SDLoc DL(Addr); |
| if (CurDAG->isBaseWithConstantOffset(Addr)) { |
| SDValue N0 = Addr.getOperand(0); |
| SDValue N1 = Addr.getOperand(1); |
| ConstantSDNode *C1 = cast<ConstantSDNode>(N1); |
| if (isDSOffsetLegal(N0, C1->getSExtValue(), 16)) { |
| // (add n0, c0) |
| Base = N0; |
| Offset = CurDAG->getTargetConstant(C1->getZExtValue(), DL, MVT::i16); |
| return true; |
| } |
| } else if (Addr.getOpcode() == ISD::SUB) { |
| // sub C, x -> add (sub 0, x), C |
| if (const ConstantSDNode *C = dyn_cast<ConstantSDNode>(Addr.getOperand(0))) { |
| int64_t ByteOffset = C->getSExtValue(); |
| if (isUInt<16>(ByteOffset)) { |
| SDValue Zero = CurDAG->getTargetConstant(0, DL, MVT::i32); |
| |
| // XXX - This is kind of hacky. Create a dummy sub node so we can check |
| // the known bits in isDSOffsetLegal. We need to emit the selected node |
| // here, so this is thrown away. |
| SDValue Sub = CurDAG->getNode(ISD::SUB, DL, MVT::i32, |
| Zero, Addr.getOperand(1)); |
| |
| if (isDSOffsetLegal(Sub, ByteOffset, 16)) { |
| MachineSDNode *MachineSub |
| = CurDAG->getMachineNode(AMDGPU::V_SUB_I32_e32, DL, MVT::i32, |
| Zero, Addr.getOperand(1)); |
| |
| Base = SDValue(MachineSub, 0); |
| Offset = CurDAG->getTargetConstant(ByteOffset, DL, MVT::i16); |
| return true; |
| } |
| } |
| } |
| } else if (const ConstantSDNode *CAddr = dyn_cast<ConstantSDNode>(Addr)) { |
| // If we have a constant address, prefer to put the constant into the |
| // offset. This can save moves to load the constant address since multiple |
| // operations can share the zero base address register, and enables merging |
| // into read2 / write2 instructions. |
| |
| SDLoc DL(Addr); |
| |
| if (isUInt<16>(CAddr->getZExtValue())) { |
| SDValue Zero = CurDAG->getTargetConstant(0, DL, MVT::i32); |
| MachineSDNode *MovZero = CurDAG->getMachineNode(AMDGPU::V_MOV_B32_e32, |
| DL, MVT::i32, Zero); |
| Base = SDValue(MovZero, 0); |
| Offset = CurDAG->getTargetConstant(CAddr->getZExtValue(), DL, MVT::i16); |
| return true; |
| } |
| } |
| |
| // default case |
| Base = Addr; |
| Offset = CurDAG->getTargetConstant(0, SDLoc(Addr), MVT::i16); |
| return true; |
| } |
| |
| // TODO: If offset is too big, put low 16-bit into offset. |
| bool AMDGPUDAGToDAGISel::SelectDS64Bit4ByteAligned(SDValue Addr, SDValue &Base, |
| SDValue &Offset0, |
| SDValue &Offset1) const { |
| SDLoc DL(Addr); |
| |
| if (CurDAG->isBaseWithConstantOffset(Addr)) { |
| SDValue N0 = Addr.getOperand(0); |
| SDValue N1 = Addr.getOperand(1); |
| ConstantSDNode *C1 = cast<ConstantSDNode>(N1); |
| unsigned DWordOffset0 = C1->getZExtValue() / 4; |
| unsigned DWordOffset1 = DWordOffset0 + 1; |
| // (add n0, c0) |
| if (isDSOffsetLegal(N0, DWordOffset1, 8)) { |
| Base = N0; |
| Offset0 = CurDAG->getTargetConstant(DWordOffset0, DL, MVT::i8); |
| Offset1 = CurDAG->getTargetConstant(DWordOffset1, DL, MVT::i8); |
| return true; |
| } |
| } else if (Addr.getOpcode() == ISD::SUB) { |
| // sub C, x -> add (sub 0, x), C |
| if (const ConstantSDNode *C = dyn_cast<ConstantSDNode>(Addr.getOperand(0))) { |
| unsigned DWordOffset0 = C->getZExtValue() / 4; |
| unsigned DWordOffset1 = DWordOffset0 + 1; |
| |
| if (isUInt<8>(DWordOffset0)) { |
| SDLoc DL(Addr); |
| SDValue Zero = CurDAG->getTargetConstant(0, DL, MVT::i32); |
| |
| // XXX - This is kind of hacky. Create a dummy sub node so we can check |
| // the known bits in isDSOffsetLegal. We need to emit the selected node |
| // here, so this is thrown away. |
| SDValue Sub = CurDAG->getNode(ISD::SUB, DL, MVT::i32, |
| Zero, Addr.getOperand(1)); |
| |
| if (isDSOffsetLegal(Sub, DWordOffset1, 8)) { |
| MachineSDNode *MachineSub |
| = CurDAG->getMachineNode(AMDGPU::V_SUB_I32_e32, DL, MVT::i32, |
| Zero, Addr.getOperand(1)); |
| |
| Base = SDValue(MachineSub, 0); |
| Offset0 = CurDAG->getTargetConstant(DWordOffset0, DL, MVT::i8); |
| Offset1 = CurDAG->getTargetConstant(DWordOffset1, DL, MVT::i8); |
| return true; |
| } |
| } |
| } |
| } else if (const ConstantSDNode *CAddr = dyn_cast<ConstantSDNode>(Addr)) { |
| unsigned DWordOffset0 = CAddr->getZExtValue() / 4; |
| unsigned DWordOffset1 = DWordOffset0 + 1; |
| assert(4 * DWordOffset0 == CAddr->getZExtValue()); |
| |
| if (isUInt<8>(DWordOffset0) && isUInt<8>(DWordOffset1)) { |
| SDValue Zero = CurDAG->getTargetConstant(0, DL, MVT::i32); |
| MachineSDNode *MovZero |
| = CurDAG->getMachineNode(AMDGPU::V_MOV_B32_e32, |
| DL, MVT::i32, Zero); |
| Base = SDValue(MovZero, 0); |
| Offset0 = CurDAG->getTargetConstant(DWordOffset0, DL, MVT::i8); |
| Offset1 = CurDAG->getTargetConstant(DWordOffset1, DL, MVT::i8); |
| return true; |
| } |
| } |
| |
| // default case |
| |
| // FIXME: This is broken on SI where we still need to check if the base |
| // pointer is positive here. |
| Base = Addr; |
| Offset0 = CurDAG->getTargetConstant(0, DL, MVT::i8); |
| Offset1 = CurDAG->getTargetConstant(1, DL, MVT::i8); |
| return true; |
| } |
| |
| static bool isLegalMUBUFImmOffset(unsigned Imm) { |
| return isUInt<12>(Imm); |
| } |
| |
| static bool isLegalMUBUFImmOffset(const ConstantSDNode *Imm) { |
| return isLegalMUBUFImmOffset(Imm->getZExtValue()); |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectMUBUF(SDValue Addr, SDValue &Ptr, |
| SDValue &VAddr, SDValue &SOffset, |
| SDValue &Offset, SDValue &Offen, |
| SDValue &Idxen, SDValue &Addr64, |
| SDValue &GLC, SDValue &SLC, |
| SDValue &TFE) const { |
| // Subtarget prefers to use flat instruction |
| if (Subtarget->useFlatForGlobal()) |
| return false; |
| |
| SDLoc DL(Addr); |
| |
| if (!GLC.getNode()) |
| GLC = CurDAG->getTargetConstant(0, DL, MVT::i1); |
| if (!SLC.getNode()) |
| SLC = CurDAG->getTargetConstant(0, DL, MVT::i1); |
| TFE = CurDAG->getTargetConstant(0, DL, MVT::i1); |
| |
| Idxen = CurDAG->getTargetConstant(0, DL, MVT::i1); |
| Offen = CurDAG->getTargetConstant(0, DL, MVT::i1); |
| Addr64 = CurDAG->getTargetConstant(0, DL, MVT::i1); |
| SOffset = CurDAG->getTargetConstant(0, DL, MVT::i32); |
| |
| if (CurDAG->isBaseWithConstantOffset(Addr)) { |
| SDValue N0 = Addr.getOperand(0); |
| SDValue N1 = Addr.getOperand(1); |
| ConstantSDNode *C1 = cast<ConstantSDNode>(N1); |
| |
| if (N0.getOpcode() == ISD::ADD) { |
| // (add (add N2, N3), C1) -> addr64 |
| SDValue N2 = N0.getOperand(0); |
| SDValue N3 = N0.getOperand(1); |
| Addr64 = CurDAG->getTargetConstant(1, DL, MVT::i1); |
| Ptr = N2; |
| VAddr = N3; |
| } else { |
| // (add N0, C1) -> offset |
| VAddr = CurDAG->getTargetConstant(0, DL, MVT::i32); |
| Ptr = N0; |
| } |
| |
| if (isLegalMUBUFImmOffset(C1)) { |
| Offset = CurDAG->getTargetConstant(C1->getZExtValue(), DL, MVT::i16); |
| return true; |
| } |
| |
| if (isUInt<32>(C1->getZExtValue())) { |
| // Illegal offset, store it in soffset. |
| Offset = CurDAG->getTargetConstant(0, DL, MVT::i16); |
| SOffset = SDValue(CurDAG->getMachineNode(AMDGPU::S_MOV_B32, DL, MVT::i32, |
| CurDAG->getTargetConstant(C1->getZExtValue(), DL, MVT::i32)), |
| 0); |
| return true; |
| } |
| } |
| |
| if (Addr.getOpcode() == ISD::ADD) { |
| // (add N0, N1) -> addr64 |
| SDValue N0 = Addr.getOperand(0); |
| SDValue N1 = Addr.getOperand(1); |
| Addr64 = CurDAG->getTargetConstant(1, DL, MVT::i1); |
| Ptr = N0; |
| VAddr = N1; |
| Offset = CurDAG->getTargetConstant(0, DL, MVT::i16); |
| return true; |
| } |
| |
| // default case -> offset |
| VAddr = CurDAG->getTargetConstant(0, DL, MVT::i32); |
| Ptr = Addr; |
| Offset = CurDAG->getTargetConstant(0, DL, MVT::i16); |
| |
| return true; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectMUBUFAddr64(SDValue Addr, SDValue &SRsrc, |
| SDValue &VAddr, SDValue &SOffset, |
| SDValue &Offset, SDValue &GLC, |
| SDValue &SLC, SDValue &TFE) const { |
| SDValue Ptr, Offen, Idxen, Addr64; |
| |
| // addr64 bit was removed for volcanic islands. |
| if (Subtarget->getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS) |
| return false; |
| |
| if (!SelectMUBUF(Addr, Ptr, VAddr, SOffset, Offset, Offen, Idxen, Addr64, |
| GLC, SLC, TFE)) |
| return false; |
| |
| ConstantSDNode *C = cast<ConstantSDNode>(Addr64); |
| if (C->getSExtValue()) { |
| SDLoc DL(Addr); |
| |
| const SITargetLowering& Lowering = |
| *static_cast<const SITargetLowering*>(getTargetLowering()); |
| |
| SRsrc = SDValue(Lowering.wrapAddr64Rsrc(*CurDAG, DL, Ptr), 0); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectMUBUFAddr64(SDValue Addr, SDValue &SRsrc, |
| SDValue &VAddr, SDValue &SOffset, |
| SDValue &Offset, |
| SDValue &SLC) const { |
| SLC = CurDAG->getTargetConstant(0, SDLoc(Addr), MVT::i1); |
| SDValue GLC, TFE; |
| |
| return SelectMUBUFAddr64(Addr, SRsrc, VAddr, SOffset, Offset, GLC, SLC, TFE); |
| } |
| |
| SDValue AMDGPUDAGToDAGISel::foldFrameIndex(SDValue N) const { |
| if (auto FI = dyn_cast<FrameIndexSDNode>(N)) |
| return CurDAG->getTargetFrameIndex(FI->getIndex(), FI->getValueType(0)); |
| return N; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectMUBUFScratchOffen(SDValue Addr, SDValue &Rsrc, |
| SDValue &VAddr, SDValue &SOffset, |
| SDValue &ImmOffset) const { |
| |
| SDLoc DL(Addr); |
| MachineFunction &MF = CurDAG->getMachineFunction(); |
| const SIMachineFunctionInfo *Info = MF.getInfo<SIMachineFunctionInfo>(); |
| |
| Rsrc = CurDAG->getRegister(Info->getScratchRSrcReg(), MVT::v4i32); |
| SOffset = CurDAG->getRegister(Info->getScratchWaveOffsetReg(), MVT::i32); |
| |
| if (ConstantSDNode *CAddr = dyn_cast<ConstantSDNode>(Addr)) { |
| unsigned Imm = CAddr->getZExtValue(); |
| assert(!isLegalMUBUFImmOffset(Imm) && |
| "should have been selected by other pattern"); |
| |
| SDValue HighBits = CurDAG->getTargetConstant(Imm & ~4095, DL, MVT::i32); |
| MachineSDNode *MovHighBits = CurDAG->getMachineNode(AMDGPU::V_MOV_B32_e32, |
| DL, MVT::i32, HighBits); |
| VAddr = SDValue(MovHighBits, 0); |
| ImmOffset = CurDAG->getTargetConstant(Imm & 4095, DL, MVT::i16); |
| return true; |
| } |
| |
| if (CurDAG->isBaseWithConstantOffset(Addr)) { |
| // (add n0, c1) |
| |
| SDValue N0 = Addr.getOperand(0); |
| SDValue N1 = Addr.getOperand(1); |
| |
| // Offsets in vaddr must be positive. |
| ConstantSDNode *C1 = cast<ConstantSDNode>(N1); |
| if (isLegalMUBUFImmOffset(C1)) { |
| VAddr = foldFrameIndex(N0); |
| ImmOffset = CurDAG->getTargetConstant(C1->getZExtValue(), DL, MVT::i16); |
| return true; |
| } |
| } |
| |
| // (node) |
| VAddr = foldFrameIndex(Addr); |
| ImmOffset = CurDAG->getTargetConstant(0, DL, MVT::i16); |
| return true; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectMUBUFScratchOffset(SDValue Addr, |
| SDValue &SRsrc, |
| SDValue &SOffset, |
| SDValue &Offset) const { |
| ConstantSDNode *CAddr = dyn_cast<ConstantSDNode>(Addr); |
| if (!CAddr || !isLegalMUBUFImmOffset(CAddr)) |
| return false; |
| |
| SDLoc DL(Addr); |
| MachineFunction &MF = CurDAG->getMachineFunction(); |
| const SIMachineFunctionInfo *Info = MF.getInfo<SIMachineFunctionInfo>(); |
| |
| SRsrc = CurDAG->getRegister(Info->getScratchRSrcReg(), MVT::v4i32); |
| SOffset = CurDAG->getRegister(Info->getScratchWaveOffsetReg(), MVT::i32); |
| Offset = CurDAG->getTargetConstant(CAddr->getZExtValue(), DL, MVT::i16); |
| return true; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectMUBUFOffset(SDValue Addr, SDValue &SRsrc, |
| SDValue &SOffset, SDValue &Offset, |
| SDValue &GLC, SDValue &SLC, |
| SDValue &TFE) const { |
| SDValue Ptr, VAddr, Offen, Idxen, Addr64; |
| const SIInstrInfo *TII = |
| static_cast<const SIInstrInfo *>(Subtarget->getInstrInfo()); |
| |
| if (!SelectMUBUF(Addr, Ptr, VAddr, SOffset, Offset, Offen, Idxen, Addr64, |
| GLC, SLC, TFE)) |
| return false; |
| |
| if (!cast<ConstantSDNode>(Offen)->getSExtValue() && |
| !cast<ConstantSDNode>(Idxen)->getSExtValue() && |
| !cast<ConstantSDNode>(Addr64)->getSExtValue()) { |
| uint64_t Rsrc = TII->getDefaultRsrcDataFormat() | |
| APInt::getAllOnesValue(32).getZExtValue(); // Size |
| SDLoc DL(Addr); |
| |
| const SITargetLowering& Lowering = |
| *static_cast<const SITargetLowering*>(getTargetLowering()); |
| |
| SRsrc = SDValue(Lowering.buildRSRC(*CurDAG, DL, Ptr, 0, Rsrc), 0); |
| return true; |
| } |
| return false; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectMUBUFOffset(SDValue Addr, SDValue &SRsrc, |
| SDValue &Soffset, SDValue &Offset |
| ) const { |
| SDValue GLC, SLC, TFE; |
| |
| return SelectMUBUFOffset(Addr, SRsrc, Soffset, Offset, GLC, SLC, TFE); |
| } |
| bool AMDGPUDAGToDAGISel::SelectMUBUFOffset(SDValue Addr, SDValue &SRsrc, |
| SDValue &Soffset, SDValue &Offset, |
| SDValue &SLC) const { |
| SDValue GLC, TFE; |
| |
| return SelectMUBUFOffset(Addr, SRsrc, Soffset, Offset, GLC, SLC, TFE); |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectMUBUFConstant(SDValue Constant, |
| SDValue &SOffset, |
| SDValue &ImmOffset) const { |
| SDLoc DL(Constant); |
| uint32_t Imm = cast<ConstantSDNode>(Constant)->getZExtValue(); |
| uint32_t Overflow = 0; |
| |
| if (Imm >= 4096) { |
| if (Imm <= 4095 + 64) { |
| // Use an SOffset inline constant for 1..64 |
| Overflow = Imm - 4095; |
| Imm = 4095; |
| } else { |
| // Try to keep the same value in SOffset for adjacent loads, so that |
| // the corresponding register contents can be re-used. |
| // |
| // Load values with all low-bits set into SOffset, so that a larger |
| // range of values can be covered using s_movk_i32 |
| uint32_t High = (Imm + 1) & ~4095; |
| uint32_t Low = (Imm + 1) & 4095; |
| Imm = Low; |
| Overflow = High - 1; |
| } |
| } |
| |
| // There is a hardware bug in SI and CI which prevents address clamping in |
| // MUBUF instructions from working correctly with SOffsets. The immediate |
| // offset is unaffected. |
| if (Overflow > 0 && |
| Subtarget->getGeneration() <= AMDGPUSubtarget::SEA_ISLANDS) |
| return false; |
| |
| ImmOffset = CurDAG->getTargetConstant(Imm, DL, MVT::i16); |
| |
| if (Overflow <= 64) |
| SOffset = CurDAG->getTargetConstant(Overflow, DL, MVT::i32); |
| else |
| SOffset = SDValue(CurDAG->getMachineNode(AMDGPU::S_MOV_B32, DL, MVT::i32, |
| CurDAG->getTargetConstant(Overflow, DL, MVT::i32)), |
| 0); |
| |
| return true; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectMUBUFIntrinsicOffset(SDValue Offset, |
| SDValue &SOffset, |
| SDValue &ImmOffset) const { |
| SDLoc DL(Offset); |
| |
| if (!isa<ConstantSDNode>(Offset)) |
| return false; |
| |
| return SelectMUBUFConstant(Offset, SOffset, ImmOffset); |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectMUBUFIntrinsicVOffset(SDValue Offset, |
| SDValue &SOffset, |
| SDValue &ImmOffset, |
| SDValue &VOffset) const { |
| SDLoc DL(Offset); |
| |
| // Don't generate an unnecessary voffset for constant offsets. |
| if (isa<ConstantSDNode>(Offset)) { |
| SDValue Tmp1, Tmp2; |
| |
| // When necessary, use a voffset in <= CI anyway to work around a hardware |
| // bug. |
| if (Subtarget->getGeneration() > AMDGPUSubtarget::SEA_ISLANDS || |
| SelectMUBUFConstant(Offset, Tmp1, Tmp2)) |
| return false; |
| } |
| |
| if (CurDAG->isBaseWithConstantOffset(Offset)) { |
| SDValue N0 = Offset.getOperand(0); |
| SDValue N1 = Offset.getOperand(1); |
| if (cast<ConstantSDNode>(N1)->getSExtValue() >= 0 && |
| SelectMUBUFConstant(N1, SOffset, ImmOffset)) { |
| VOffset = N0; |
| return true; |
| } |
| } |
| |
| SOffset = CurDAG->getTargetConstant(0, DL, MVT::i32); |
| ImmOffset = CurDAG->getTargetConstant(0, DL, MVT::i16); |
| VOffset = Offset; |
| |
| return true; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectFlat(SDValue Addr, |
| SDValue &VAddr, |
| SDValue &SLC, |
| SDValue &TFE) const { |
| VAddr = Addr; |
| TFE = SLC = CurDAG->getTargetConstant(0, SDLoc(), MVT::i1); |
| return true; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectSMRDOffset(SDValue ByteOffsetNode, |
| SDValue &Offset, bool &Imm) const { |
| |
| // FIXME: Handle non-constant offsets. |
| ConstantSDNode *C = dyn_cast<ConstantSDNode>(ByteOffsetNode); |
| if (!C) |
| return false; |
| |
| SDLoc SL(ByteOffsetNode); |
| AMDGPUSubtarget::Generation Gen = Subtarget->getGeneration(); |
| int64_t ByteOffset = C->getSExtValue(); |
| int64_t EncodedOffset = AMDGPU::getSMRDEncodedOffset(*Subtarget, ByteOffset); |
| |
| if (AMDGPU::isLegalSMRDImmOffset(*Subtarget, ByteOffset)) { |
| Offset = CurDAG->getTargetConstant(EncodedOffset, SL, MVT::i32); |
| Imm = true; |
| return true; |
| } |
| |
| if (!isUInt<32>(EncodedOffset) || !isUInt<32>(ByteOffset)) |
| return false; |
| |
| if (Gen == AMDGPUSubtarget::SEA_ISLANDS && isUInt<32>(EncodedOffset)) { |
| // 32-bit Immediates are supported on Sea Islands. |
| Offset = CurDAG->getTargetConstant(EncodedOffset, SL, MVT::i32); |
| } else { |
| SDValue C32Bit = CurDAG->getTargetConstant(ByteOffset, SL, MVT::i32); |
| Offset = SDValue(CurDAG->getMachineNode(AMDGPU::S_MOV_B32, SL, MVT::i32, |
| C32Bit), 0); |
| } |
| Imm = false; |
| return true; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectSMRD(SDValue Addr, SDValue &SBase, |
| SDValue &Offset, bool &Imm) const { |
| SDLoc SL(Addr); |
| if (CurDAG->isBaseWithConstantOffset(Addr)) { |
| SDValue N0 = Addr.getOperand(0); |
| SDValue N1 = Addr.getOperand(1); |
| |
| if (SelectSMRDOffset(N1, Offset, Imm)) { |
| SBase = N0; |
| return true; |
| } |
| } |
| SBase = Addr; |
| Offset = CurDAG->getTargetConstant(0, SL, MVT::i32); |
| Imm = true; |
| return true; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectSMRDImm(SDValue Addr, SDValue &SBase, |
| SDValue &Offset) const { |
| bool Imm; |
| return SelectSMRD(Addr, SBase, Offset, Imm) && Imm; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectSMRDImm32(SDValue Addr, SDValue &SBase, |
| SDValue &Offset) const { |
| |
| if (Subtarget->getGeneration() != AMDGPUSubtarget::SEA_ISLANDS) |
| return false; |
| |
| bool Imm; |
| if (!SelectSMRD(Addr, SBase, Offset, Imm)) |
| return false; |
| |
| return !Imm && isa<ConstantSDNode>(Offset); |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectSMRDSgpr(SDValue Addr, SDValue &SBase, |
| SDValue &Offset) const { |
| bool Imm; |
| return SelectSMRD(Addr, SBase, Offset, Imm) && !Imm && |
| !isa<ConstantSDNode>(Offset); |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectSMRDBufferImm(SDValue Addr, |
| SDValue &Offset) const { |
| bool Imm; |
| return SelectSMRDOffset(Addr, Offset, Imm) && Imm; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectSMRDBufferImm32(SDValue Addr, |
| SDValue &Offset) const { |
| if (Subtarget->getGeneration() != AMDGPUSubtarget::SEA_ISLANDS) |
| return false; |
| |
| bool Imm; |
| if (!SelectSMRDOffset(Addr, Offset, Imm)) |
| return false; |
| |
| return !Imm && isa<ConstantSDNode>(Offset); |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectSMRDBufferSgpr(SDValue Addr, |
| SDValue &Offset) const { |
| bool Imm; |
| return SelectSMRDOffset(Addr, Offset, Imm) && !Imm && |
| !isa<ConstantSDNode>(Offset); |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectMOVRELOffset(SDValue Index, |
| SDValue &Base, |
| SDValue &Offset) const { |
| SDLoc DL(Index); |
| |
| if (CurDAG->isBaseWithConstantOffset(Index)) { |
| SDValue N0 = Index.getOperand(0); |
| SDValue N1 = Index.getOperand(1); |
| ConstantSDNode *C1 = cast<ConstantSDNode>(N1); |
| |
| // (add n0, c0) |
| Base = N0; |
| Offset = CurDAG->getTargetConstant(C1->getZExtValue(), DL, MVT::i32); |
| return true; |
| } |
| |
| if (isa<ConstantSDNode>(Index)) |
| return false; |
| |
| Base = Index; |
| Offset = CurDAG->getTargetConstant(0, DL, MVT::i32); |
| return true; |
| } |
| |
| SDNode *AMDGPUDAGToDAGISel::getS_BFE(unsigned Opcode, const SDLoc &DL, |
| SDValue Val, uint32_t Offset, |
| uint32_t Width) { |
| // Transformation function, pack the offset and width of a BFE into |
| // the format expected by the S_BFE_I32 / S_BFE_U32. In the second |
| // source, bits [5:0] contain the offset and bits [22:16] the width. |
| uint32_t PackedVal = Offset | (Width << 16); |
| SDValue PackedConst = CurDAG->getTargetConstant(PackedVal, DL, MVT::i32); |
| |
| return CurDAG->getMachineNode(Opcode, DL, MVT::i32, Val, PackedConst); |
| } |
| |
| void AMDGPUDAGToDAGISel::SelectS_BFEFromShifts(SDNode *N) { |
| // "(a << b) srl c)" ---> "BFE_U32 a, (c-b), (32-c) |
| // "(a << b) sra c)" ---> "BFE_I32 a, (c-b), (32-c) |
| // Predicate: 0 < b <= c < 32 |
| |
| const SDValue &Shl = N->getOperand(0); |
| ConstantSDNode *B = dyn_cast<ConstantSDNode>(Shl->getOperand(1)); |
| ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1)); |
| |
| if (B && C) { |
| uint32_t BVal = B->getZExtValue(); |
| uint32_t CVal = C->getZExtValue(); |
| |
| if (0 < BVal && BVal <= CVal && CVal < 32) { |
| bool Signed = N->getOpcode() == ISD::SRA; |
| unsigned Opcode = Signed ? AMDGPU::S_BFE_I32 : AMDGPU::S_BFE_U32; |
| |
| ReplaceNode(N, getS_BFE(Opcode, SDLoc(N), Shl.getOperand(0), CVal - BVal, |
| 32 - CVal)); |
| return; |
| } |
| } |
| SelectCode(N); |
| } |
| |
| void AMDGPUDAGToDAGISel::SelectS_BFE(SDNode *N) { |
| switch (N->getOpcode()) { |
| case ISD::AND: |
| if (N->getOperand(0).getOpcode() == ISD::SRL) { |
| // "(a srl b) & mask" ---> "BFE_U32 a, b, popcount(mask)" |
| // Predicate: isMask(mask) |
| const SDValue &Srl = N->getOperand(0); |
| ConstantSDNode *Shift = dyn_cast<ConstantSDNode>(Srl.getOperand(1)); |
| ConstantSDNode *Mask = dyn_cast<ConstantSDNode>(N->getOperand(1)); |
| |
| if (Shift && Mask) { |
| uint32_t ShiftVal = Shift->getZExtValue(); |
| uint32_t MaskVal = Mask->getZExtValue(); |
| |
| if (isMask_32(MaskVal)) { |
| uint32_t WidthVal = countPopulation(MaskVal); |
| |
| ReplaceNode(N, getS_BFE(AMDGPU::S_BFE_U32, SDLoc(N), |
| Srl.getOperand(0), ShiftVal, WidthVal)); |
| return; |
| } |
| } |
| } |
| break; |
| case ISD::SRL: |
| if (N->getOperand(0).getOpcode() == ISD::AND) { |
| // "(a & mask) srl b)" ---> "BFE_U32 a, b, popcount(mask >> b)" |
| // Predicate: isMask(mask >> b) |
| const SDValue &And = N->getOperand(0); |
| ConstantSDNode *Shift = dyn_cast<ConstantSDNode>(N->getOperand(1)); |
| ConstantSDNode *Mask = dyn_cast<ConstantSDNode>(And->getOperand(1)); |
| |
| if (Shift && Mask) { |
| uint32_t ShiftVal = Shift->getZExtValue(); |
| uint32_t MaskVal = Mask->getZExtValue() >> ShiftVal; |
| |
| if (isMask_32(MaskVal)) { |
| uint32_t WidthVal = countPopulation(MaskVal); |
| |
| ReplaceNode(N, getS_BFE(AMDGPU::S_BFE_U32, SDLoc(N), |
| And.getOperand(0), ShiftVal, WidthVal)); |
| return; |
| } |
| } |
| } else if (N->getOperand(0).getOpcode() == ISD::SHL) { |
| SelectS_BFEFromShifts(N); |
| return; |
| } |
| break; |
| case ISD::SRA: |
| if (N->getOperand(0).getOpcode() == ISD::SHL) { |
| SelectS_BFEFromShifts(N); |
| return; |
| } |
| break; |
| |
| case ISD::SIGN_EXTEND_INREG: { |
| // sext_inreg (srl x, 16), i8 -> bfe_i32 x, 16, 8 |
| SDValue Src = N->getOperand(0); |
| if (Src.getOpcode() != ISD::SRL) |
| break; |
| |
| const ConstantSDNode *Amt = dyn_cast<ConstantSDNode>(Src.getOperand(1)); |
| if (!Amt) |
| break; |
| |
| unsigned Width = cast<VTSDNode>(N->getOperand(1))->getVT().getSizeInBits(); |
| ReplaceNode(N, getS_BFE(AMDGPU::S_BFE_I32, SDLoc(N), Src.getOperand(0), |
| Amt->getZExtValue(), Width)); |
| return; |
| } |
| } |
| |
| SelectCode(N); |
| } |
| |
| bool AMDGPUDAGToDAGISel::isCBranchSCC(const SDNode *N) const { |
| assert(N->getOpcode() == ISD::BRCOND); |
| if (!N->hasOneUse()) |
| return false; |
| |
| SDValue Cond = N->getOperand(1); |
| if (Cond.getOpcode() == ISD::CopyToReg) |
| Cond = Cond.getOperand(2); |
| |
| if (Cond.getOpcode() != ISD::SETCC || !Cond.hasOneUse()) |
| return false; |
| |
| MVT VT = Cond.getOperand(0).getSimpleValueType(); |
| if (VT == MVT::i32) |
| return true; |
| |
| if (VT == MVT::i64) { |
| auto ST = static_cast<const SISubtarget *>(Subtarget); |
| |
| ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get(); |
| return (CC == ISD::SETEQ || CC == ISD::SETNE) && ST->hasScalarCompareEq64(); |
| } |
| |
| return false; |
| } |
| |
| void AMDGPUDAGToDAGISel::SelectBRCOND(SDNode *N) { |
| SDValue Cond = N->getOperand(1); |
| |
| if (Cond.isUndef()) { |
| CurDAG->SelectNodeTo(N, AMDGPU::SI_BR_UNDEF, MVT::Other, |
| N->getOperand(2), N->getOperand(0)); |
| return; |
| } |
| |
| if (isCBranchSCC(N)) { |
| // This brcond will use S_CBRANCH_SCC*, so let tablegen handle it. |
| SelectCode(N); |
| return; |
| } |
| |
| SDLoc SL(N); |
| |
| SDValue VCC = CurDAG->getCopyToReg(N->getOperand(0), SL, AMDGPU::VCC, Cond); |
| CurDAG->SelectNodeTo(N, AMDGPU::S_CBRANCH_VCCNZ, MVT::Other, |
| N->getOperand(2), // Basic Block |
| VCC.getValue(0)); |
| } |
| |
| // This is here because there isn't a way to use the generated sub0_sub1 as the |
| // subreg index to EXTRACT_SUBREG in tablegen. |
| void AMDGPUDAGToDAGISel::SelectATOMIC_CMP_SWAP(SDNode *N) { |
| MemSDNode *Mem = cast<MemSDNode>(N); |
| unsigned AS = Mem->getAddressSpace(); |
| if (AS == AMDGPUASI.FLAT_ADDRESS) { |
| SelectCode(N); |
| return; |
| } |
| |
| MVT VT = N->getSimpleValueType(0); |
| bool Is32 = (VT == MVT::i32); |
| SDLoc SL(N); |
| |
| MachineSDNode *CmpSwap = nullptr; |
| if (Subtarget->hasAddr64()) { |
| SDValue SRsrc, VAddr, SOffset, Offset, GLC, SLC; |
| |
| if (SelectMUBUFAddr64(Mem->getBasePtr(), SRsrc, VAddr, SOffset, Offset, SLC)) { |
| unsigned Opcode = Is32 ? AMDGPU::BUFFER_ATOMIC_CMPSWAP_RTN_ADDR64 : |
| AMDGPU::BUFFER_ATOMIC_CMPSWAP_X2_RTN_ADDR64; |
| SDValue CmpVal = Mem->getOperand(2); |
| |
| // XXX - Do we care about glue operands? |
| |
| SDValue Ops[] = { |
| CmpVal, VAddr, SRsrc, SOffset, Offset, SLC, Mem->getChain() |
| }; |
| |
| CmpSwap = CurDAG->getMachineNode(Opcode, SL, Mem->getVTList(), Ops); |
| } |
| } |
| |
| if (!CmpSwap) { |
| SDValue SRsrc, SOffset, Offset, SLC; |
| if (SelectMUBUFOffset(Mem->getBasePtr(), SRsrc, SOffset, Offset, SLC)) { |
| unsigned Opcode = Is32 ? AMDGPU::BUFFER_ATOMIC_CMPSWAP_RTN_OFFSET : |
| AMDGPU::BUFFER_ATOMIC_CMPSWAP_X2_RTN_OFFSET; |
| |
| SDValue CmpVal = Mem->getOperand(2); |
| SDValue Ops[] = { |
| CmpVal, SRsrc, SOffset, Offset, SLC, Mem->getChain() |
| }; |
| |
| CmpSwap = CurDAG->getMachineNode(Opcode, SL, Mem->getVTList(), Ops); |
| } |
| } |
| |
| if (!CmpSwap) { |
| SelectCode(N); |
| return; |
| } |
| |
| MachineSDNode::mmo_iterator MMOs = MF->allocateMemRefsArray(1); |
| *MMOs = Mem->getMemOperand(); |
| CmpSwap->setMemRefs(MMOs, MMOs + 1); |
| |
| unsigned SubReg = Is32 ? AMDGPU::sub0 : AMDGPU::sub0_sub1; |
| SDValue Extract |
| = CurDAG->getTargetExtractSubreg(SubReg, SL, VT, SDValue(CmpSwap, 0)); |
| |
| ReplaceUses(SDValue(N, 0), Extract); |
| ReplaceUses(SDValue(N, 1), SDValue(CmpSwap, 1)); |
| CurDAG->RemoveDeadNode(N); |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectVOP3Mods(SDValue In, SDValue &Src, |
| SDValue &SrcMods) const { |
| unsigned Mods = 0; |
| Src = In; |
| |
| if (Src.getOpcode() == ISD::FNEG) { |
| Mods |= SISrcMods::NEG; |
| Src = Src.getOperand(0); |
| } |
| |
| if (Src.getOpcode() == ISD::FABS) { |
| Mods |= SISrcMods::ABS; |
| Src = Src.getOperand(0); |
| } |
| |
| SrcMods = CurDAG->getTargetConstant(Mods, SDLoc(In), MVT::i32); |
| return true; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectVOP3Mods_NNaN(SDValue In, SDValue &Src, |
| SDValue &SrcMods) const { |
| SelectVOP3Mods(In, Src, SrcMods); |
| return isNoNanSrc(Src); |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectVOP3NoMods(SDValue In, SDValue &Src, |
| SDValue &SrcMods) const { |
| bool Res = SelectVOP3Mods(In, Src, SrcMods); |
| return Res && cast<ConstantSDNode>(SrcMods)->isNullValue(); |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectVOP3Mods0(SDValue In, SDValue &Src, |
| SDValue &SrcMods, SDValue &Clamp, |
| SDValue &Omod) const { |
| SDLoc DL(In); |
| // FIXME: Handle Clamp and Omod |
| Clamp = CurDAG->getTargetConstant(0, DL, MVT::i32); |
| Omod = CurDAG->getTargetConstant(0, DL, MVT::i32); |
| |
| return SelectVOP3Mods(In, Src, SrcMods); |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectVOP3NoMods0(SDValue In, SDValue &Src, |
| SDValue &SrcMods, SDValue &Clamp, |
| SDValue &Omod) const { |
| bool Res = SelectVOP3Mods0(In, Src, SrcMods, Clamp, Omod); |
| |
| return Res && cast<ConstantSDNode>(SrcMods)->isNullValue() && |
| cast<ConstantSDNode>(Clamp)->isNullValue() && |
| cast<ConstantSDNode>(Omod)->isNullValue(); |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectVOP3Mods0Clamp(SDValue In, SDValue &Src, |
| SDValue &SrcMods, |
| SDValue &Omod) const { |
| // FIXME: Handle Omod |
| Omod = CurDAG->getTargetConstant(0, SDLoc(In), MVT::i32); |
| |
| return SelectVOP3Mods(In, Src, SrcMods); |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectVOP3Mods0Clamp0OMod(SDValue In, SDValue &Src, |
| SDValue &SrcMods, |
| SDValue &Clamp, |
| SDValue &Omod) const { |
| Clamp = Omod = CurDAG->getTargetConstant(0, SDLoc(In), MVT::i32); |
| return SelectVOP3Mods(In, Src, SrcMods); |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectVOP3OMods(SDValue In, SDValue &Src, |
| SDValue &Clamp, SDValue &Omod) const { |
| Src = In; |
| |
| SDLoc DL(In); |
| // FIXME: Handle Clamp and Omod |
| Clamp = CurDAG->getTargetConstant(0, DL, MVT::i32); |
| Omod = CurDAG->getTargetConstant(0, DL, MVT::i32); |
| |
| return true; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectVOP3PMods(SDValue In, SDValue &Src, |
| SDValue &SrcMods) const { |
| unsigned Mods = 0; |
| Src = In; |
| |
| // FIXME: Look for on separate components |
| if (Src.getOpcode() == ISD::FNEG) { |
| Mods |= (SISrcMods::NEG | SISrcMods::NEG_HI); |
| Src = Src.getOperand(0); |
| } |
| |
| // Packed instructions do not have abs modifiers. |
| |
| // FIXME: Handle abs/neg of individual components. |
| // FIXME: Handle swizzling with op_sel |
| Mods |= SISrcMods::OP_SEL_1; |
| |
| SrcMods = CurDAG->getTargetConstant(Mods, SDLoc(In), MVT::i32); |
| return true; |
| } |
| |
| bool AMDGPUDAGToDAGISel::SelectVOP3PMods0(SDValue In, SDValue &Src, |
| SDValue &SrcMods, |
| SDValue &Clamp) const { |
| SDLoc SL(In); |
| |
| // FIXME: Handle clamp and op_sel |
| Clamp = CurDAG->getTargetConstant(0, SL, MVT::i32); |
| |
| return SelectVOP3PMods(In, Src, SrcMods); |
| } |
| |
| void AMDGPUDAGToDAGISel::PostprocessISelDAG() { |
| const AMDGPUTargetLowering& Lowering = |
| *static_cast<const AMDGPUTargetLowering*>(getTargetLowering()); |
| bool IsModified = false; |
| do { |
| IsModified = false; |
| // Go over all selected nodes and try to fold them a bit more |
| for (SDNode &Node : CurDAG->allnodes()) { |
| MachineSDNode *MachineNode = dyn_cast<MachineSDNode>(&Node); |
| if (!MachineNode) |
| continue; |
| |
| SDNode *ResNode = Lowering.PostISelFolding(MachineNode, *CurDAG); |
| if (ResNode != &Node) { |
| ReplaceUses(&Node, ResNode); |
| IsModified = true; |
| } |
| } |
| CurDAG->RemoveDeadNodes(); |
| } while (IsModified); |
| } |