| //==-- AArch64ISelLowering.h - AArch64 DAG Lowering Interface ----*- 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 defines the interfaces that AArch64 uses to lower LLVM code into a |
| // selection DAG. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIB_TARGET_AARCH64_AARCH64ISELLOWERING_H |
| #define LLVM_LIB_TARGET_AARCH64_AARCH64ISELLOWERING_H |
| |
| #include "AArch64.h" |
| #include "llvm/CodeGen/CallingConvLower.h" |
| #include "llvm/CodeGen/SelectionDAG.h" |
| #include "llvm/CodeGen/TargetLowering.h" |
| #include "llvm/IR/CallingConv.h" |
| #include "llvm/IR/Instruction.h" |
| |
| namespace llvm { |
| |
| namespace AArch64ISD { |
| |
| enum NodeType : unsigned { |
| FIRST_NUMBER = ISD::BUILTIN_OP_END, |
| WrapperLarge, // 4-instruction MOVZ/MOVK sequence for 64-bit addresses. |
| CALL, // Function call. |
| |
| // Produces the full sequence of instructions for getting the thread pointer |
| // offset of a variable into X0, using the TLSDesc model. |
| TLSDESC_CALLSEQ, |
| ADRP, // Page address of a TargetGlobalAddress operand. |
| ADR, // ADR |
| ADDlow, // Add the low 12 bits of a TargetGlobalAddress operand. |
| LOADgot, // Load from automatically generated descriptor (e.g. Global |
| // Offset Table, TLS record). |
| RET_FLAG, // Return with a flag operand. Operand 0 is the chain operand. |
| BRCOND, // Conditional branch instruction; "b.cond". |
| CSEL, |
| FCSEL, // Conditional move instruction. |
| CSINV, // Conditional select invert. |
| CSNEG, // Conditional select negate. |
| CSINC, // Conditional select increment. |
| |
| // Pointer to the thread's local storage area. Materialised from TPIDR_EL0 on |
| // ELF. |
| THREAD_POINTER, |
| ADC, |
| SBC, // adc, sbc instructions |
| |
| // Arithmetic instructions which write flags. |
| ADDS, |
| SUBS, |
| ADCS, |
| SBCS, |
| ANDS, |
| |
| // Conditional compares. Operands: left,right,falsecc,cc,flags |
| CCMP, |
| CCMN, |
| FCCMP, |
| |
| // Floating point comparison |
| FCMP, |
| |
| // Scalar extract |
| EXTR, |
| |
| // Scalar-to-vector duplication |
| DUP, |
| DUPLANE8, |
| DUPLANE16, |
| DUPLANE32, |
| DUPLANE64, |
| |
| // Vector immedate moves |
| MOVI, |
| MOVIshift, |
| MOVIedit, |
| MOVImsl, |
| FMOV, |
| MVNIshift, |
| MVNImsl, |
| |
| // Vector immediate ops |
| BICi, |
| ORRi, |
| |
| // Vector bit select: similar to ISD::VSELECT but not all bits within an |
| // element must be identical. |
| BSL, |
| |
| // Vector arithmetic negation |
| NEG, |
| |
| // Vector shuffles |
| ZIP1, |
| ZIP2, |
| UZP1, |
| UZP2, |
| TRN1, |
| TRN2, |
| REV16, |
| REV32, |
| REV64, |
| EXT, |
| |
| // Vector shift by scalar |
| VSHL, |
| VLSHR, |
| VASHR, |
| |
| // Vector shift by scalar (again) |
| SQSHL_I, |
| UQSHL_I, |
| SQSHLU_I, |
| SRSHR_I, |
| URSHR_I, |
| |
| // Vector comparisons |
| CMEQ, |
| CMGE, |
| CMGT, |
| CMHI, |
| CMHS, |
| FCMEQ, |
| FCMGE, |
| FCMGT, |
| |
| // Vector zero comparisons |
| CMEQz, |
| CMGEz, |
| CMGTz, |
| CMLEz, |
| CMLTz, |
| FCMEQz, |
| FCMGEz, |
| FCMGTz, |
| FCMLEz, |
| FCMLTz, |
| |
| // Vector across-lanes addition |
| // Only the lower result lane is defined. |
| SADDV, |
| UADDV, |
| |
| // Vector across-lanes min/max |
| // Only the lower result lane is defined. |
| SMINV, |
| UMINV, |
| SMAXV, |
| UMAXV, |
| |
| SMAXV_PRED, |
| UMAXV_PRED, |
| SMINV_PRED, |
| UMINV_PRED, |
| ORV_PRED, |
| EORV_PRED, |
| ANDV_PRED, |
| |
| // Vector bitwise negation |
| NOT, |
| |
| // Vector bitwise selection |
| BIT, |
| |
| // Compare-and-branch |
| CBZ, |
| CBNZ, |
| TBZ, |
| TBNZ, |
| |
| // Tail calls |
| TC_RETURN, |
| |
| // Custom prefetch handling |
| PREFETCH, |
| |
| // {s|u}int to FP within a FP register. |
| SITOF, |
| UITOF, |
| |
| /// Natural vector cast. ISD::BITCAST is not natural in the big-endian |
| /// world w.r.t vectors; which causes additional REV instructions to be |
| /// generated to compensate for the byte-swapping. But sometimes we do |
| /// need to re-interpret the data in SIMD vector registers in big-endian |
| /// mode without emitting such REV instructions. |
| NVCAST, |
| |
| SMULL, |
| UMULL, |
| |
| // Reciprocal estimates and steps. |
| FRECPE, FRECPS, |
| FRSQRTE, FRSQRTS, |
| |
| SUNPKHI, |
| SUNPKLO, |
| UUNPKHI, |
| UUNPKLO, |
| |
| CLASTA_N, |
| CLASTB_N, |
| LASTA, |
| LASTB, |
| REV, |
| TBL, |
| |
| INSR, |
| PTEST, |
| PTRUE, |
| |
| // Unsigned gather loads. |
| GLD1, |
| GLD1_SCALED, |
| GLD1_UXTW, |
| GLD1_SXTW, |
| GLD1_UXTW_SCALED, |
| GLD1_SXTW_SCALED, |
| GLD1_IMM, |
| |
| // Signed gather loads |
| GLD1S, |
| GLD1S_SCALED, |
| GLD1S_UXTW, |
| GLD1S_SXTW, |
| GLD1S_UXTW_SCALED, |
| GLD1S_SXTW_SCALED, |
| GLD1S_IMM, |
| // Scatter store |
| SST1, |
| SST1_SCALED, |
| SST1_UXTW, |
| SST1_SXTW, |
| SST1_UXTW_SCALED, |
| SST1_SXTW_SCALED, |
| SST1_IMM, |
| |
| // Strict (exception-raising) floating point comparison |
| STRICT_FCMP = ISD::FIRST_TARGET_STRICTFP_OPCODE, |
| STRICT_FCMPE, |
| |
| // NEON Load/Store with post-increment base updates |
| LD2post = ISD::FIRST_TARGET_MEMORY_OPCODE, |
| LD3post, |
| LD4post, |
| ST2post, |
| ST3post, |
| ST4post, |
| LD1x2post, |
| LD1x3post, |
| LD1x4post, |
| ST1x2post, |
| ST1x3post, |
| ST1x4post, |
| LD1DUPpost, |
| LD2DUPpost, |
| LD3DUPpost, |
| LD4DUPpost, |
| LD1LANEpost, |
| LD2LANEpost, |
| LD3LANEpost, |
| LD4LANEpost, |
| ST2LANEpost, |
| ST3LANEpost, |
| ST4LANEpost, |
| |
| STG, |
| STZG, |
| ST2G, |
| STZ2G, |
| |
| LDP, |
| STP |
| }; |
| |
| } // end namespace AArch64ISD |
| |
| namespace { |
| |
| // Any instruction that defines a 32-bit result zeros out the high half of the |
| // register. Truncate can be lowered to EXTRACT_SUBREG. CopyFromReg may |
| // be copying from a truncate. But any other 32-bit operation will zero-extend |
| // up to 64 bits. |
| // FIXME: X86 also checks for CMOV here. Do we need something similar? |
| static inline bool isDef32(const SDNode &N) { |
| unsigned Opc = N.getOpcode(); |
| return Opc != ISD::TRUNCATE && Opc != TargetOpcode::EXTRACT_SUBREG && |
| Opc != ISD::CopyFromReg; |
| } |
| |
| } // end anonymous namespace |
| |
| class AArch64Subtarget; |
| class AArch64TargetMachine; |
| |
| class AArch64TargetLowering : public TargetLowering { |
| public: |
| explicit AArch64TargetLowering(const TargetMachine &TM, |
| const AArch64Subtarget &STI); |
| |
| /// Selects the correct CCAssignFn for a given CallingConvention value. |
| CCAssignFn *CCAssignFnForCall(CallingConv::ID CC, bool IsVarArg) const; |
| |
| /// Selects the correct CCAssignFn for a given CallingConvention value. |
| CCAssignFn *CCAssignFnForReturn(CallingConv::ID CC) const; |
| |
| /// Determine which of the bits specified in Mask are known to be either zero |
| /// or one and return them in the KnownZero/KnownOne bitsets. |
| void computeKnownBitsForTargetNode(const SDValue Op, KnownBits &Known, |
| const APInt &DemandedElts, |
| const SelectionDAG &DAG, |
| unsigned Depth = 0) const override; |
| |
| MVT getPointerTy(const DataLayout &DL, uint32_t AS = 0) const override { |
| // Returning i64 unconditionally here (i.e. even for ILP32) means that the |
| // *DAG* representation of pointers will always be 64-bits. They will be |
| // truncated and extended when transferred to memory, but the 64-bit DAG |
| // allows us to use AArch64's addressing modes much more easily. |
| return MVT::getIntegerVT(64); |
| } |
| |
| bool targetShrinkDemandedConstant(SDValue Op, const APInt &Demanded, |
| TargetLoweringOpt &TLO) const override; |
| |
| MVT getScalarShiftAmountTy(const DataLayout &DL, EVT) const override; |
| |
| /// Returns true if the target allows unaligned memory accesses of the |
| /// specified type. |
| bool allowsMisalignedMemoryAccesses( |
| EVT VT, unsigned AddrSpace = 0, unsigned Align = 1, |
| MachineMemOperand::Flags Flags = MachineMemOperand::MONone, |
| bool *Fast = nullptr) const override; |
| /// LLT variant. |
| bool allowsMisalignedMemoryAccesses( |
| LLT Ty, unsigned AddrSpace, unsigned Align, MachineMemOperand::Flags Flags, |
| bool *Fast = nullptr) const override; |
| |
| /// Provide custom lowering hooks for some operations. |
| SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override; |
| |
| const char *getTargetNodeName(unsigned Opcode) const override; |
| |
| SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override; |
| |
| /// Returns true if a cast between SrcAS and DestAS is a noop. |
| bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override { |
| // Addrspacecasts are always noops. |
| return true; |
| } |
| |
| /// This method returns a target specific FastISel object, or null if the |
| /// target does not support "fast" ISel. |
| FastISel *createFastISel(FunctionLoweringInfo &funcInfo, |
| const TargetLibraryInfo *libInfo) const override; |
| |
| bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const override; |
| |
| bool isFPImmLegal(const APFloat &Imm, EVT VT, |
| bool ForCodeSize) const override; |
| |
| /// Return true if the given shuffle mask can be codegen'd directly, or if it |
| /// should be stack expanded. |
| bool isShuffleMaskLegal(ArrayRef<int> M, EVT VT) const override; |
| |
| /// Return the ISD::SETCC ValueType. |
| EVT getSetCCResultType(const DataLayout &DL, LLVMContext &Context, |
| EVT VT) const override; |
| |
| SDValue ReconstructShuffle(SDValue Op, SelectionDAG &DAG) const; |
| |
| MachineBasicBlock *EmitF128CSEL(MachineInstr &MI, |
| MachineBasicBlock *BB) const; |
| |
| MachineBasicBlock *EmitLoweredCatchRet(MachineInstr &MI, |
| MachineBasicBlock *BB) const; |
| |
| MachineBasicBlock *EmitLoweredCatchPad(MachineInstr &MI, |
| MachineBasicBlock *BB) const; |
| |
| MachineBasicBlock * |
| EmitInstrWithCustomInserter(MachineInstr &MI, |
| MachineBasicBlock *MBB) const override; |
| |
| bool getTgtMemIntrinsic(IntrinsicInfo &Info, const CallInst &I, |
| MachineFunction &MF, |
| unsigned Intrinsic) const override; |
| |
| bool shouldReduceLoadWidth(SDNode *Load, ISD::LoadExtType ExtTy, |
| EVT NewVT) const override; |
| |
| bool isTruncateFree(Type *Ty1, Type *Ty2) const override; |
| bool isTruncateFree(EVT VT1, EVT VT2) const override; |
| |
| bool isProfitableToHoist(Instruction *I) const override; |
| |
| bool isZExtFree(Type *Ty1, Type *Ty2) const override; |
| bool isZExtFree(EVT VT1, EVT VT2) const override; |
| bool isZExtFree(SDValue Val, EVT VT2) const override; |
| |
| bool shouldSinkOperands(Instruction *I, |
| SmallVectorImpl<Use *> &Ops) const override; |
| |
| bool hasPairedLoad(EVT LoadedType, unsigned &RequiredAligment) const override; |
| |
| unsigned getMaxSupportedInterleaveFactor() const override { return 4; } |
| |
| bool lowerInterleavedLoad(LoadInst *LI, |
| ArrayRef<ShuffleVectorInst *> Shuffles, |
| ArrayRef<unsigned> Indices, |
| unsigned Factor) const override; |
| bool lowerInterleavedStore(StoreInst *SI, ShuffleVectorInst *SVI, |
| unsigned Factor) const override; |
| |
| bool isLegalAddImmediate(int64_t) const override; |
| bool isLegalICmpImmediate(int64_t) const override; |
| |
| bool shouldConsiderGEPOffsetSplit() const override; |
| |
| EVT getOptimalMemOpType(uint64_t Size, unsigned DstAlign, unsigned SrcAlign, |
| bool IsMemset, bool ZeroMemset, bool MemcpyStrSrc, |
| const AttributeList &FuncAttributes) const override; |
| |
| LLT getOptimalMemOpLLT(uint64_t Size, unsigned DstAlign, unsigned SrcAlign, |
| bool IsMemset, bool ZeroMemset, bool MemcpyStrSrc, |
| const AttributeList &FuncAttributes) const override; |
| |
| /// Return true if the addressing mode represented by AM is legal for this |
| /// target, for a load/store of the specified type. |
| bool isLegalAddressingMode(const DataLayout &DL, const AddrMode &AM, Type *Ty, |
| unsigned AS, |
| Instruction *I = nullptr) const override; |
| |
| /// Return the cost of the scaling factor used in the addressing |
| /// mode represented by AM for this target, for a load/store |
| /// of the specified type. |
| /// If the AM is supported, the return value must be >= 0. |
| /// If the AM is not supported, it returns a negative value. |
| int getScalingFactorCost(const DataLayout &DL, const AddrMode &AM, Type *Ty, |
| unsigned AS) const override; |
| |
| /// Return true if an FMA operation is faster than a pair of fmul and fadd |
| /// instructions. fmuladd intrinsics will be expanded to FMAs when this method |
| /// returns true, otherwise fmuladd is expanded to fmul + fadd. |
| bool isFMAFasterThanFMulAndFAdd(const MachineFunction &MF, |
| EVT VT) const override; |
| bool isFMAFasterThanFMulAndFAdd(const Function &F, Type *Ty) const override; |
| |
| const MCPhysReg *getScratchRegisters(CallingConv::ID CC) const override; |
| |
| /// Returns false if N is a bit extraction pattern of (X >> C) & Mask. |
| bool isDesirableToCommuteWithShift(const SDNode *N, |
| CombineLevel Level) const override; |
| |
| /// Returns true if it is beneficial to convert a load of a constant |
| /// to just the constant itself. |
| bool shouldConvertConstantLoadToIntImm(const APInt &Imm, |
| Type *Ty) const override; |
| |
| /// Return true if EXTRACT_SUBVECTOR is cheap for this result type |
| /// with this index. |
| bool isExtractSubvectorCheap(EVT ResVT, EVT SrcVT, |
| unsigned Index) const override; |
| |
| Value *emitLoadLinked(IRBuilder<> &Builder, Value *Addr, |
| AtomicOrdering Ord) const override; |
| Value *emitStoreConditional(IRBuilder<> &Builder, Value *Val, |
| Value *Addr, AtomicOrdering Ord) const override; |
| |
| void emitAtomicCmpXchgNoStoreLLBalance(IRBuilder<> &Builder) const override; |
| |
| TargetLoweringBase::AtomicExpansionKind |
| shouldExpandAtomicLoadInIR(LoadInst *LI) const override; |
| bool shouldExpandAtomicStoreInIR(StoreInst *SI) const override; |
| TargetLoweringBase::AtomicExpansionKind |
| shouldExpandAtomicRMWInIR(AtomicRMWInst *AI) const override; |
| |
| TargetLoweringBase::AtomicExpansionKind |
| shouldExpandAtomicCmpXchgInIR(AtomicCmpXchgInst *AI) const override; |
| |
| bool useLoadStackGuardNode() const override; |
| TargetLoweringBase::LegalizeTypeAction |
| getPreferredVectorAction(MVT VT) const override; |
| |
| /// If the target has a standard location for the stack protector cookie, |
| /// returns the address of that location. Otherwise, returns nullptr. |
| Value *getIRStackGuard(IRBuilder<> &IRB) const override; |
| |
| void insertSSPDeclarations(Module &M) const override; |
| Value *getSDagStackGuard(const Module &M) const override; |
| Function *getSSPStackGuardCheck(const Module &M) const override; |
| |
| /// If the target has a standard location for the unsafe stack pointer, |
| /// returns the address of that location. Otherwise, returns nullptr. |
| Value *getSafeStackPointerLocation(IRBuilder<> &IRB) const override; |
| |
| /// If a physical register, this returns the register that receives the |
| /// exception address on entry to an EH pad. |
| unsigned |
| getExceptionPointerRegister(const Constant *PersonalityFn) const override { |
| // FIXME: This is a guess. Has this been defined yet? |
| return AArch64::X0; |
| } |
| |
| /// If a physical register, this returns the register that receives the |
| /// exception typeid on entry to a landing pad. |
| unsigned |
| getExceptionSelectorRegister(const Constant *PersonalityFn) const override { |
| // FIXME: This is a guess. Has this been defined yet? |
| return AArch64::X1; |
| } |
| |
| bool isIntDivCheap(EVT VT, AttributeList Attr) const override; |
| |
| bool canMergeStoresTo(unsigned AddressSpace, EVT MemVT, |
| const SelectionDAG &DAG) const override { |
| // Do not merge to float value size (128 bytes) if no implicit |
| // float attribute is set. |
| |
| bool NoFloat = DAG.getMachineFunction().getFunction().hasFnAttribute( |
| Attribute::NoImplicitFloat); |
| |
| if (NoFloat) |
| return (MemVT.getSizeInBits() <= 64); |
| return true; |
| } |
| |
| bool isCheapToSpeculateCttz() const override { |
| return true; |
| } |
| |
| bool isCheapToSpeculateCtlz() const override { |
| return true; |
| } |
| |
| bool isMaskAndCmp0FoldingBeneficial(const Instruction &AndI) const override; |
| |
| bool hasAndNotCompare(SDValue V) const override { |
| // We can use bics for any scalar. |
| return V.getValueType().isScalarInteger(); |
| } |
| |
| bool hasAndNot(SDValue Y) const override { |
| EVT VT = Y.getValueType(); |
| |
| if (!VT.isVector()) |
| return hasAndNotCompare(Y); |
| |
| return VT.getSizeInBits() >= 64; // vector 'bic' |
| } |
| |
| bool shouldProduceAndByConstByHoistingConstFromShiftsLHSOfAnd( |
| SDValue X, ConstantSDNode *XC, ConstantSDNode *CC, SDValue Y, |
| unsigned OldShiftOpcode, unsigned NewShiftOpcode, |
| SelectionDAG &DAG) const override; |
| |
| bool shouldExpandShift(SelectionDAG &DAG, SDNode *N) const override; |
| |
| bool shouldTransformSignedTruncationCheck(EVT XVT, |
| unsigned KeptBits) const override { |
| // For vectors, we don't have a preference.. |
| if (XVT.isVector()) |
| return false; |
| |
| auto VTIsOk = [](EVT VT) -> bool { |
| return VT == MVT::i8 || VT == MVT::i16 || VT == MVT::i32 || |
| VT == MVT::i64; |
| }; |
| |
| // We are ok with KeptBitsVT being byte/word/dword, what SXT supports. |
| // XVT will be larger than KeptBitsVT. |
| MVT KeptBitsVT = MVT::getIntegerVT(KeptBits); |
| return VTIsOk(XVT) && VTIsOk(KeptBitsVT); |
| } |
| |
| bool preferIncOfAddToSubOfNot(EVT VT) const override; |
| |
| bool hasBitPreservingFPLogic(EVT VT) const override { |
| // FIXME: Is this always true? It should be true for vectors at least. |
| return VT == MVT::f32 || VT == MVT::f64; |
| } |
| |
| bool supportSplitCSR(MachineFunction *MF) const override { |
| return MF->getFunction().getCallingConv() == CallingConv::CXX_FAST_TLS && |
| MF->getFunction().hasFnAttribute(Attribute::NoUnwind); |
| } |
| void initializeSplitCSR(MachineBasicBlock *Entry) const override; |
| void insertCopiesSplitCSR( |
| MachineBasicBlock *Entry, |
| const SmallVectorImpl<MachineBasicBlock *> &Exits) const override; |
| |
| bool supportSwiftError() const override { |
| return true; |
| } |
| |
| /// Enable aggressive FMA fusion on targets that want it. |
| bool enableAggressiveFMAFusion(EVT VT) const override; |
| |
| /// Returns the size of the platform's va_list object. |
| unsigned getVaListSizeInBits(const DataLayout &DL) const override; |
| |
| /// Returns true if \p VecTy is a legal interleaved access type. This |
| /// function checks the vector element type and the overall width of the |
| /// vector. |
| bool isLegalInterleavedAccessType(VectorType *VecTy, |
| const DataLayout &DL) const; |
| |
| /// Returns the number of interleaved accesses that will be generated when |
| /// lowering accesses of the given type. |
| unsigned getNumInterleavedAccesses(VectorType *VecTy, |
| const DataLayout &DL) const; |
| |
| MachineMemOperand::Flags getMMOFlags(const Instruction &I) const override; |
| |
| bool functionArgumentNeedsConsecutiveRegisters(Type *Ty, |
| CallingConv::ID CallConv, |
| bool isVarArg) const override; |
| /// Used for exception handling on Win64. |
| bool needsFixedCatchObjects() const override; |
| private: |
| /// Keep a pointer to the AArch64Subtarget around so that we can |
| /// make the right decision when generating code for different targets. |
| const AArch64Subtarget *Subtarget; |
| |
| bool isExtFreeImpl(const Instruction *Ext) const override; |
| |
| void addTypeForNEON(MVT VT, MVT PromotedBitwiseVT); |
| void addDRTypeForNEON(MVT VT); |
| void addQRTypeForNEON(MVT VT); |
| |
| SDValue LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv, |
| bool isVarArg, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| const SDLoc &DL, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals) const override; |
| |
| SDValue LowerCall(CallLoweringInfo & /*CLI*/, |
| SmallVectorImpl<SDValue> &InVals) const override; |
| |
| SDValue LowerCallResult(SDValue Chain, SDValue InFlag, |
| CallingConv::ID CallConv, bool isVarArg, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| const SDLoc &DL, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals, bool isThisReturn, |
| SDValue ThisVal) const; |
| |
| SDValue LowerSTORE(SDValue Op, SelectionDAG &DAG) const; |
| |
| SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const; |
| |
| bool isEligibleForTailCallOptimization( |
| SDValue Callee, CallingConv::ID CalleeCC, bool isVarArg, |
| const SmallVectorImpl<ISD::OutputArg> &Outs, |
| const SmallVectorImpl<SDValue> &OutVals, |
| const SmallVectorImpl<ISD::InputArg> &Ins, SelectionDAG &DAG) const; |
| |
| /// Finds the incoming stack arguments which overlap the given fixed stack |
| /// object and incorporates their load into the current chain. This prevents |
| /// an upcoming store from clobbering the stack argument before it's used. |
| SDValue addTokenForArgument(SDValue Chain, SelectionDAG &DAG, |
| MachineFrameInfo &MFI, int ClobberedFI) const; |
| |
| bool DoesCalleeRestoreStack(CallingConv::ID CallCC, bool TailCallOpt) const; |
| |
| void saveVarArgRegisters(CCState &CCInfo, SelectionDAG &DAG, const SDLoc &DL, |
| SDValue &Chain) const; |
| |
| bool CanLowerReturn(CallingConv::ID CallConv, MachineFunction &MF, |
| bool isVarArg, |
| const SmallVectorImpl<ISD::OutputArg> &Outs, |
| LLVMContext &Context) const override; |
| |
| SDValue LowerReturn(SDValue Chain, CallingConv::ID CallConv, bool isVarArg, |
| const SmallVectorImpl<ISD::OutputArg> &Outs, |
| const SmallVectorImpl<SDValue> &OutVals, const SDLoc &DL, |
| SelectionDAG &DAG) const override; |
| |
| SDValue getTargetNode(GlobalAddressSDNode *N, EVT Ty, SelectionDAG &DAG, |
| unsigned Flag) const; |
| SDValue getTargetNode(JumpTableSDNode *N, EVT Ty, SelectionDAG &DAG, |
| unsigned Flag) const; |
| SDValue getTargetNode(ConstantPoolSDNode *N, EVT Ty, SelectionDAG &DAG, |
| unsigned Flag) const; |
| SDValue getTargetNode(BlockAddressSDNode *N, EVT Ty, SelectionDAG &DAG, |
| unsigned Flag) const; |
| template <class NodeTy> |
| SDValue getGOT(NodeTy *N, SelectionDAG &DAG, unsigned Flags = 0) const; |
| template <class NodeTy> |
| SDValue getAddrLarge(NodeTy *N, SelectionDAG &DAG, unsigned Flags = 0) const; |
| template <class NodeTy> |
| SDValue getAddr(NodeTy *N, SelectionDAG &DAG, unsigned Flags = 0) const; |
| template <class NodeTy> |
| SDValue getAddrTiny(NodeTy *N, SelectionDAG &DAG, unsigned Flags = 0) const; |
| SDValue LowerADDROFRETURNADDR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerDarwinGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerELFGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerELFTLSLocalExec(const GlobalValue *GV, SDValue ThreadBase, |
| const SDLoc &DL, SelectionDAG &DAG) const; |
| SDValue LowerELFTLSDescCallSeq(SDValue SymAddr, const SDLoc &DL, |
| SelectionDAG &DAG) const; |
| SDValue LowerWindowsGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSETCC(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSELECT_CC(ISD::CondCode CC, SDValue LHS, SDValue RHS, |
| SDValue TVal, SDValue FVal, const SDLoc &dl, |
| SelectionDAG &DAG) const; |
| SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerBR_JT(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerAAPCS_VASTART(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerDarwin_VASTART(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerWin64_VASTART(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerVACOPY(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerVAARG(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSPONENTRY(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFLT_ROUNDS_(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSPLAT_VECTOR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerEXTRACT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerVectorSRA_SRL_SHL(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerShiftLeftParts(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerShiftRightParts(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerVSETCC(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerCTPOP(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerF128Call(SDValue Op, SelectionDAG &DAG, |
| RTLIB::Libcall Call) const; |
| SDValue LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFP_EXTEND(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFP_ROUND(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerVectorFP_TO_INT(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFP_TO_INT(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerINT_TO_FP(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerVectorOR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFSINCOS(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerVECREDUCE(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerATOMIC_LOAD_SUB(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerATOMIC_LOAD_AND(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerWindowsDYNAMIC_STACKALLOC(SDValue Op, SDValue Chain, |
| SDValue &Size, |
| SelectionDAG &DAG) const; |
| |
| SDValue BuildSDIVPow2(SDNode *N, const APInt &Divisor, SelectionDAG &DAG, |
| SmallVectorImpl<SDNode *> &Created) const override; |
| SDValue getSqrtEstimate(SDValue Operand, SelectionDAG &DAG, int Enabled, |
| int &ExtraSteps, bool &UseOneConst, |
| bool Reciprocal) const override; |
| SDValue getRecipEstimate(SDValue Operand, SelectionDAG &DAG, int Enabled, |
| int &ExtraSteps) const override; |
| unsigned combineRepeatedFPDivisors() const override; |
| |
| ConstraintType getConstraintType(StringRef Constraint) const override; |
| Register getRegisterByName(const char* RegName, LLT VT, |
| const MachineFunction &MF) const override; |
| |
| /// Examine constraint string and operand type and determine a weight value. |
| /// The operand object must already have been set up with the operand type. |
| ConstraintWeight |
| getSingleConstraintMatchWeight(AsmOperandInfo &info, |
| const char *constraint) const override; |
| |
| std::pair<unsigned, const TargetRegisterClass *> |
| getRegForInlineAsmConstraint(const TargetRegisterInfo *TRI, |
| StringRef Constraint, MVT VT) const override; |
| |
| const char *LowerXConstraint(EVT ConstraintVT) const override; |
| |
| void LowerAsmOperandForConstraint(SDValue Op, std::string &Constraint, |
| std::vector<SDValue> &Ops, |
| SelectionDAG &DAG) const override; |
| |
| unsigned getInlineAsmMemConstraint(StringRef ConstraintCode) const override { |
| if (ConstraintCode == "Q") |
| return InlineAsm::Constraint_Q; |
| // FIXME: clang has code for 'Ump', 'Utf', 'Usa', and 'Ush' but these are |
| // followed by llvm_unreachable so we'll leave them unimplemented in |
| // the backend for now. |
| return TargetLowering::getInlineAsmMemConstraint(ConstraintCode); |
| } |
| |
| bool isVectorLoadExtDesirable(SDValue ExtVal) const override; |
| bool isUsedByReturnOnly(SDNode *N, SDValue &Chain) const override; |
| bool mayBeEmittedAsTailCall(const CallInst *CI) const override; |
| bool getIndexedAddressParts(SDNode *Op, SDValue &Base, SDValue &Offset, |
| ISD::MemIndexedMode &AM, bool &IsInc, |
| SelectionDAG &DAG) const; |
| bool getPreIndexedAddressParts(SDNode *N, SDValue &Base, SDValue &Offset, |
| ISD::MemIndexedMode &AM, |
| SelectionDAG &DAG) const override; |
| bool getPostIndexedAddressParts(SDNode *N, SDNode *Op, SDValue &Base, |
| SDValue &Offset, ISD::MemIndexedMode &AM, |
| SelectionDAG &DAG) const override; |
| |
| void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue> &Results, |
| SelectionDAG &DAG) const override; |
| |
| bool shouldNormalizeToSelectSequence(LLVMContext &, EVT) const override; |
| |
| void finalizeLowering(MachineFunction &MF) const override; |
| }; |
| |
| namespace AArch64 { |
| FastISel *createFastISel(FunctionLoweringInfo &funcInfo, |
| const TargetLibraryInfo *libInfo); |
| } // end namespace AArch64 |
| |
| } // end namespace llvm |
| |
| #endif |
