| //===- MipsISelLowering.h - Mips DAG Lowering Interface ---------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the interfaces that Mips uses to lower LLVM code into a |
| // selection DAG. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIB_TARGET_MIPS_MIPSISELLOWERING_H |
| #define LLVM_LIB_TARGET_MIPS_MIPSISELLOWERING_H |
| |
| #include "MCTargetDesc/MipsABIInfo.h" |
| #include "MCTargetDesc/MipsBaseInfo.h" |
| #include "MCTargetDesc/MipsMCTargetDesc.h" |
| #include "Mips.h" |
| #include "llvm/CodeGen/CallingConvLower.h" |
| #include "llvm/CodeGen/ISDOpcodes.h" |
| #include "llvm/CodeGen/MachineMemOperand.h" |
| #include "llvm/CodeGen/SelectionDAG.h" |
| #include "llvm/CodeGen/SelectionDAGNodes.h" |
| #include "llvm/CodeGen/TargetLowering.h" |
| #include "llvm/CodeGen/ValueTypes.h" |
| #include "llvm/IR/CallingConv.h" |
| #include "llvm/IR/InlineAsm.h" |
| #include "llvm/IR/Type.h" |
| #include "llvm/Support/MachineValueType.h" |
| #include "llvm/Target/TargetMachine.h" |
| #include <algorithm> |
| #include <cassert> |
| #include <deque> |
| #include <string> |
| #include <utility> |
| #include <vector> |
| |
| namespace llvm { |
| |
| class Argument; |
| class CCState; |
| class CCValAssign; |
| class FastISel; |
| class FunctionLoweringInfo; |
| class MachineBasicBlock; |
| class MachineFrameInfo; |
| class MachineInstr; |
| class MipsCCState; |
| class MipsFunctionInfo; |
| class MipsSubtarget; |
| class MipsTargetMachine; |
| class TargetLibraryInfo; |
| class TargetRegisterClass; |
| |
| namespace MipsISD { |
| |
| enum NodeType : unsigned { |
| // Start the numbering from where ISD NodeType finishes. |
| FIRST_NUMBER = ISD::BUILTIN_OP_END, |
| |
| // Jump and link (call) |
| JmpLink, |
| |
| // Tail call |
| TailCall, |
| |
| // Get the Highest (63-48) 16 bits from a 64-bit immediate |
| Highest, |
| |
| // Get the Higher (47-32) 16 bits from a 64-bit immediate |
| Higher, |
| |
| // Get the High 16 bits from a 32/64-bit immediate |
| // No relation with Mips Hi register |
| Hi, |
| |
| // Get the Lower 16 bits from a 32/64-bit immediate |
| // No relation with Mips Lo register |
| Lo, |
| |
| // Get the High 16 bits from a 32 bit immediate for accessing the GOT. |
| GotHi, |
| |
| // Get the High 16 bits from a 32-bit immediate for accessing TLS. |
| TlsHi, |
| |
| // Handle gp_rel (small data/bss sections) relocation. |
| GPRel, |
| |
| // Thread Pointer |
| ThreadPointer, |
| |
| // Vector Floating Point Multiply and Subtract |
| FMS, |
| |
| // Floating Point Branch Conditional |
| FPBrcond, |
| |
| // Floating Point Compare |
| FPCmp, |
| |
| // Floating point select |
| FSELECT, |
| |
| // Node used to generate an MTC1 i32 to f64 instruction |
| MTC1_D64, |
| |
| // Floating Point Conditional Moves |
| CMovFP_T, |
| CMovFP_F, |
| |
| // FP-to-int truncation node. |
| TruncIntFP, |
| |
| // Return |
| Ret, |
| |
| // Interrupt, exception, error trap Return |
| ERet, |
| |
| // Software Exception Return. |
| EH_RETURN, |
| |
| // Node used to extract integer from accumulator. |
| MFHI, |
| MFLO, |
| |
| // Node used to insert integers to accumulator. |
| MTLOHI, |
| |
| // Mult nodes. |
| Mult, |
| Multu, |
| |
| // MAdd/Sub nodes |
| MAdd, |
| MAddu, |
| MSub, |
| MSubu, |
| |
| // DivRem(u) |
| DivRem, |
| DivRemU, |
| DivRem16, |
| DivRemU16, |
| |
| BuildPairF64, |
| ExtractElementF64, |
| |
| Wrapper, |
| |
| DynAlloc, |
| |
| Sync, |
| |
| Ext, |
| Ins, |
| CIns, |
| |
| // EXTR.W instrinsic nodes. |
| EXTP, |
| EXTPDP, |
| EXTR_S_H, |
| EXTR_W, |
| EXTR_R_W, |
| EXTR_RS_W, |
| SHILO, |
| MTHLIP, |
| |
| // DPA.W intrinsic nodes. |
| MULSAQ_S_W_PH, |
| MAQ_S_W_PHL, |
| MAQ_S_W_PHR, |
| MAQ_SA_W_PHL, |
| MAQ_SA_W_PHR, |
| DPAU_H_QBL, |
| DPAU_H_QBR, |
| DPSU_H_QBL, |
| DPSU_H_QBR, |
| DPAQ_S_W_PH, |
| DPSQ_S_W_PH, |
| DPAQ_SA_L_W, |
| DPSQ_SA_L_W, |
| DPA_W_PH, |
| DPS_W_PH, |
| DPAQX_S_W_PH, |
| DPAQX_SA_W_PH, |
| DPAX_W_PH, |
| DPSX_W_PH, |
| DPSQX_S_W_PH, |
| DPSQX_SA_W_PH, |
| MULSA_W_PH, |
| |
| MULT, |
| MULTU, |
| MADD_DSP, |
| MADDU_DSP, |
| MSUB_DSP, |
| MSUBU_DSP, |
| |
| // DSP shift nodes. |
| SHLL_DSP, |
| SHRA_DSP, |
| SHRL_DSP, |
| |
| // DSP setcc and select_cc nodes. |
| SETCC_DSP, |
| SELECT_CC_DSP, |
| |
| // Vector comparisons. |
| // These take a vector and return a boolean. |
| VALL_ZERO, |
| VANY_ZERO, |
| VALL_NONZERO, |
| VANY_NONZERO, |
| |
| // These take a vector and return a vector bitmask. |
| VCEQ, |
| VCLE_S, |
| VCLE_U, |
| VCLT_S, |
| VCLT_U, |
| |
| // Vector Shuffle with mask as an operand |
| VSHF, // Generic shuffle |
| SHF, // 4-element set shuffle. |
| ILVEV, // Interleave even elements |
| ILVOD, // Interleave odd elements |
| ILVL, // Interleave left elements |
| ILVR, // Interleave right elements |
| PCKEV, // Pack even elements |
| PCKOD, // Pack odd elements |
| |
| // Vector Lane Copy |
| INSVE, // Copy element from one vector to another |
| |
| // Combined (XOR (OR $a, $b), -1) |
| VNOR, |
| |
| // Extended vector element extraction |
| VEXTRACT_SEXT_ELT, |
| VEXTRACT_ZEXT_ELT, |
| |
| // Load/Store Left/Right nodes. |
| LWL = ISD::FIRST_TARGET_MEMORY_OPCODE, |
| LWR, |
| SWL, |
| SWR, |
| LDL, |
| LDR, |
| SDL, |
| SDR |
| }; |
| |
| } // ene namespace MipsISD |
| |
| //===--------------------------------------------------------------------===// |
| // TargetLowering Implementation |
| //===--------------------------------------------------------------------===// |
| |
| class MipsTargetLowering : public TargetLowering { |
| bool isMicroMips; |
| |
| public: |
| explicit MipsTargetLowering(const MipsTargetMachine &TM, |
| const MipsSubtarget &STI); |
| |
| static const MipsTargetLowering *create(const MipsTargetMachine &TM, |
| const MipsSubtarget &STI); |
| |
| /// createFastISel - 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; |
| |
| MVT getScalarShiftAmountTy(const DataLayout &, EVT) const override { |
| return MVT::i32; |
| } |
| |
| EVT getTypeForExtReturn(LLVMContext &Context, EVT VT, |
| ISD::NodeType) const override; |
| |
| bool isCheapToSpeculateCttz() const override; |
| bool isCheapToSpeculateCtlz() const override; |
| |
| /// Return the register type for a given MVT, ensuring vectors are treated |
| /// as a series of gpr sized integers. |
| MVT getRegisterTypeForCallingConv(LLVMContext &Context, CallingConv::ID CC, |
| EVT VT) const override; |
| |
| /// Return the number of registers for a given MVT, ensuring vectors are |
| /// treated as a series of gpr sized integers. |
| unsigned getNumRegistersForCallingConv(LLVMContext &Context, |
| CallingConv::ID CC, |
| EVT VT) const override; |
| |
| /// Break down vectors to the correct number of gpr sized integers. |
| unsigned getVectorTypeBreakdownForCallingConv( |
| LLVMContext &Context, CallingConv::ID CC, EVT VT, EVT &IntermediateVT, |
| unsigned &NumIntermediates, MVT &RegisterVT) const override; |
| |
| /// Return the correct alignment for the current calling convention. |
| unsigned getABIAlignmentForCallingConv(Type *ArgTy, |
| DataLayout DL) const override { |
| if (ArgTy->isVectorTy()) |
| return std::min(DL.getABITypeAlignment(ArgTy), 8U); |
| return DL.getABITypeAlignment(ArgTy); |
| } |
| |
| ISD::NodeType getExtendForAtomicOps() const override { |
| return ISD::SIGN_EXTEND; |
| } |
| |
| void LowerOperationWrapper(SDNode *N, |
| SmallVectorImpl<SDValue> &Results, |
| SelectionDAG &DAG) const override; |
| |
| /// LowerOperation - Provide custom lowering hooks for some operations. |
| SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override; |
| |
| /// ReplaceNodeResults - Replace the results of node with an illegal result |
| /// type with new values built out of custom code. |
| /// |
| void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue>&Results, |
| SelectionDAG &DAG) const override; |
| |
| /// getTargetNodeName - This method returns the name of a target specific |
| // DAG node. |
| const char *getTargetNodeName(unsigned Opcode) const override; |
| |
| /// getSetCCResultType - get the ISD::SETCC result ValueType |
| EVT getSetCCResultType(const DataLayout &DL, LLVMContext &Context, |
| EVT VT) const override; |
| |
| SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override; |
| |
| MachineBasicBlock * |
| EmitInstrWithCustomInserter(MachineInstr &MI, |
| MachineBasicBlock *MBB) const override; |
| |
| void HandleByVal(CCState *, unsigned &, unsigned) const override; |
| |
| unsigned getRegisterByName(const char* RegName, EVT VT, |
| SelectionDAG &DAG) 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 { |
| return ABI.IsN64() ? Mips::A0_64 : Mips::A0; |
| } |
| |
| /// 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 { |
| return ABI.IsN64() ? Mips::A1_64 : Mips::A1; |
| } |
| |
| /// Returns true if a cast between SrcAS and DestAS is a noop. |
| bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override { |
| // Mips doesn't have any special address spaces so we just reserve |
| // the first 256 for software use (e.g. OpenCL) and treat casts |
| // between them as noops. |
| return SrcAS < 256 && DestAS < 256; |
| } |
| |
| bool isJumpTableRelative() const override { |
| return getTargetMachine().isPositionIndependent(); |
| } |
| |
| CCAssignFn *CCAssignFnForCall() const; |
| |
| CCAssignFn *CCAssignFnForReturn() const; |
| |
| protected: |
| SDValue getGlobalReg(SelectionDAG &DAG, EVT Ty) const; |
| |
| // This method creates the following nodes, which are necessary for |
| // computing a local symbol's address: |
| // |
| // (add (load (wrapper $gp, %got(sym)), %lo(sym)) |
| template <class NodeTy> |
| SDValue getAddrLocal(NodeTy *N, const SDLoc &DL, EVT Ty, SelectionDAG &DAG, |
| bool IsN32OrN64) const { |
| unsigned GOTFlag = IsN32OrN64 ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT; |
| SDValue GOT = DAG.getNode(MipsISD::Wrapper, DL, Ty, getGlobalReg(DAG, Ty), |
| getTargetNode(N, Ty, DAG, GOTFlag)); |
| SDValue Load = |
| DAG.getLoad(Ty, DL, DAG.getEntryNode(), GOT, |
| MachinePointerInfo::getGOT(DAG.getMachineFunction())); |
| unsigned LoFlag = IsN32OrN64 ? MipsII::MO_GOT_OFST : MipsII::MO_ABS_LO; |
| SDValue Lo = DAG.getNode(MipsISD::Lo, DL, Ty, |
| getTargetNode(N, Ty, DAG, LoFlag)); |
| return DAG.getNode(ISD::ADD, DL, Ty, Load, Lo); |
| } |
| |
| // This method creates the following nodes, which are necessary for |
| // computing a global symbol's address: |
| // |
| // (load (wrapper $gp, %got(sym))) |
| template <class NodeTy> |
| SDValue getAddrGlobal(NodeTy *N, const SDLoc &DL, EVT Ty, SelectionDAG &DAG, |
| unsigned Flag, SDValue Chain, |
| const MachinePointerInfo &PtrInfo) const { |
| SDValue Tgt = DAG.getNode(MipsISD::Wrapper, DL, Ty, getGlobalReg(DAG, Ty), |
| getTargetNode(N, Ty, DAG, Flag)); |
| return DAG.getLoad(Ty, DL, Chain, Tgt, PtrInfo); |
| } |
| |
| // This method creates the following nodes, which are necessary for |
| // computing a global symbol's address in large-GOT mode: |
| // |
| // (load (wrapper (add %hi(sym), $gp), %lo(sym))) |
| template <class NodeTy> |
| SDValue getAddrGlobalLargeGOT(NodeTy *N, const SDLoc &DL, EVT Ty, |
| SelectionDAG &DAG, unsigned HiFlag, |
| unsigned LoFlag, SDValue Chain, |
| const MachinePointerInfo &PtrInfo) const { |
| SDValue Hi = DAG.getNode(MipsISD::GotHi, DL, Ty, |
| getTargetNode(N, Ty, DAG, HiFlag)); |
| Hi = DAG.getNode(ISD::ADD, DL, Ty, Hi, getGlobalReg(DAG, Ty)); |
| SDValue Wrapper = DAG.getNode(MipsISD::Wrapper, DL, Ty, Hi, |
| getTargetNode(N, Ty, DAG, LoFlag)); |
| return DAG.getLoad(Ty, DL, Chain, Wrapper, PtrInfo); |
| } |
| |
| // This method creates the following nodes, which are necessary for |
| // computing a symbol's address in non-PIC mode: |
| // |
| // (add %hi(sym), %lo(sym)) |
| // |
| // This method covers O32, N32 and N64 in sym32 mode. |
| template <class NodeTy> |
| SDValue getAddrNonPIC(NodeTy *N, const SDLoc &DL, EVT Ty, |
| SelectionDAG &DAG) const { |
| SDValue Hi = getTargetNode(N, Ty, DAG, MipsII::MO_ABS_HI); |
| SDValue Lo = getTargetNode(N, Ty, DAG, MipsII::MO_ABS_LO); |
| return DAG.getNode(ISD::ADD, DL, Ty, |
| DAG.getNode(MipsISD::Hi, DL, Ty, Hi), |
| DAG.getNode(MipsISD::Lo, DL, Ty, Lo)); |
| } |
| |
| // This method creates the following nodes, which are necessary for |
| // computing a symbol's address in non-PIC mode for N64. |
| // |
| // (add (shl (add (shl (add %highest(sym), %higher(sim)), 16), %high(sym)), |
| // 16), %lo(%sym)) |
| // |
| // FIXME: This method is not efficent for (micro)MIPS64R6. |
| template <class NodeTy> |
| SDValue getAddrNonPICSym64(NodeTy *N, const SDLoc &DL, EVT Ty, |
| SelectionDAG &DAG) const { |
| SDValue Hi = getTargetNode(N, Ty, DAG, MipsII::MO_ABS_HI); |
| SDValue Lo = getTargetNode(N, Ty, DAG, MipsII::MO_ABS_LO); |
| |
| SDValue Highest = |
| DAG.getNode(MipsISD::Highest, DL, Ty, |
| getTargetNode(N, Ty, DAG, MipsII::MO_HIGHEST)); |
| SDValue Higher = getTargetNode(N, Ty, DAG, MipsII::MO_HIGHER); |
| SDValue HigherPart = |
| DAG.getNode(ISD::ADD, DL, Ty, Highest, |
| DAG.getNode(MipsISD::Higher, DL, Ty, Higher)); |
| SDValue Cst = DAG.getConstant(16, DL, MVT::i32); |
| SDValue Shift = DAG.getNode(ISD::SHL, DL, Ty, HigherPart, Cst); |
| SDValue Add = DAG.getNode(ISD::ADD, DL, Ty, Shift, |
| DAG.getNode(MipsISD::Hi, DL, Ty, Hi)); |
| SDValue Shift2 = DAG.getNode(ISD::SHL, DL, Ty, Add, Cst); |
| |
| return DAG.getNode(ISD::ADD, DL, Ty, Shift2, |
| DAG.getNode(MipsISD::Lo, DL, Ty, Lo)); |
| } |
| |
| // This method creates the following nodes, which are necessary for |
| // computing a symbol's address using gp-relative addressing: |
| // |
| // (add $gp, %gp_rel(sym)) |
| template <class NodeTy> |
| SDValue getAddrGPRel(NodeTy *N, const SDLoc &DL, EVT Ty, |
| SelectionDAG &DAG, bool IsN64) const { |
| SDValue GPRel = getTargetNode(N, Ty, DAG, MipsII::MO_GPREL); |
| return DAG.getNode( |
| ISD::ADD, DL, Ty, |
| DAG.getRegister(IsN64 ? Mips::GP_64 : Mips::GP, Ty), |
| DAG.getNode(MipsISD::GPRel, DL, DAG.getVTList(Ty), GPRel)); |
| } |
| |
| /// This function fills Ops, which is the list of operands that will later |
| /// be used when a function call node is created. It also generates |
| /// copyToReg nodes to set up argument registers. |
| virtual void |
| getOpndList(SmallVectorImpl<SDValue> &Ops, |
| std::deque<std::pair<unsigned, SDValue>> &RegsToPass, |
| bool IsPICCall, bool GlobalOrExternal, bool InternalLinkage, |
| bool IsCallReloc, CallLoweringInfo &CLI, SDValue Callee, |
| SDValue Chain) const; |
| |
| protected: |
| SDValue lowerLOAD(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerSTORE(SDValue Op, SelectionDAG &DAG) const; |
| |
| // Subtarget Info |
| const MipsSubtarget &Subtarget; |
| // Cache the ABI from the TargetMachine, we use it everywhere. |
| const MipsABIInfo &ABI; |
| |
| private: |
| // Create a TargetGlobalAddress node. |
| SDValue getTargetNode(GlobalAddressSDNode *N, EVT Ty, SelectionDAG &DAG, |
| unsigned Flag) const; |
| |
| // Create a TargetExternalSymbol node. |
| SDValue getTargetNode(ExternalSymbolSDNode *N, EVT Ty, SelectionDAG &DAG, |
| unsigned Flag) const; |
| |
| // Create a TargetBlockAddress node. |
| SDValue getTargetNode(BlockAddressSDNode *N, EVT Ty, SelectionDAG &DAG, |
| unsigned Flag) const; |
| |
| // Create a TargetJumpTable node. |
| SDValue getTargetNode(JumpTableSDNode *N, EVT Ty, SelectionDAG &DAG, |
| unsigned Flag) const; |
| |
| // Create a TargetConstantPool node. |
| SDValue getTargetNode(ConstantPoolSDNode *N, EVT Ty, SelectionDAG &DAG, |
| unsigned Flag) const; |
| |
| // Lower Operand helpers |
| SDValue LowerCallResult(SDValue Chain, SDValue InFlag, |
| CallingConv::ID CallConv, bool isVarArg, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| const SDLoc &dl, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals, |
| TargetLowering::CallLoweringInfo &CLI) const; |
| |
| // Lower Operand specifics |
| SDValue lowerBRCOND(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerConstantPool(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerBlockAddress(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerJumpTable(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerSELECT(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerSETCC(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerVASTART(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerVAARG(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerFABS(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerATOMIC_FENCE(SDValue Op, SelectionDAG& DAG) const; |
| SDValue lowerShiftLeftParts(SDValue Op, SelectionDAG& DAG) const; |
| SDValue lowerShiftRightParts(SDValue Op, SelectionDAG& DAG, |
| bool IsSRA) const; |
| SDValue lowerEH_DWARF_CFA(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerFP_TO_SINT(SDValue Op, SelectionDAG &DAG) const; |
| |
| /// isEligibleForTailCallOptimization - Check whether the call is eligible |
| /// for tail call optimization. |
| virtual bool |
| isEligibleForTailCallOptimization(const CCState &CCInfo, |
| unsigned NextStackOffset, |
| const MipsFunctionInfo &FI) const = 0; |
| |
| /// copyByValArg - Copy argument registers which were used to pass a byval |
| /// argument to the stack. Create a stack frame object for the byval |
| /// argument. |
| void copyByValRegs(SDValue Chain, const SDLoc &DL, |
| std::vector<SDValue> &OutChains, SelectionDAG &DAG, |
| const ISD::ArgFlagsTy &Flags, |
| SmallVectorImpl<SDValue> &InVals, |
| const Argument *FuncArg, unsigned FirstReg, |
| unsigned LastReg, const CCValAssign &VA, |
| MipsCCState &State) const; |
| |
| /// passByValArg - Pass a byval argument in registers or on stack. |
| void passByValArg(SDValue Chain, const SDLoc &DL, |
| std::deque<std::pair<unsigned, SDValue>> &RegsToPass, |
| SmallVectorImpl<SDValue> &MemOpChains, SDValue StackPtr, |
| MachineFrameInfo &MFI, SelectionDAG &DAG, SDValue Arg, |
| unsigned FirstReg, unsigned LastReg, |
| const ISD::ArgFlagsTy &Flags, bool isLittle, |
| const CCValAssign &VA) const; |
| |
| /// writeVarArgRegs - Write variable function arguments passed in registers |
| /// to the stack. Also create a stack frame object for the first variable |
| /// argument. |
| void writeVarArgRegs(std::vector<SDValue> &OutChains, SDValue Chain, |
| const SDLoc &DL, SelectionDAG &DAG, |
| CCState &State) const; |
| |
| 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 passArgOnStack(SDValue StackPtr, unsigned Offset, SDValue Chain, |
| SDValue Arg, const SDLoc &DL, bool IsTailCall, |
| SelectionDAG &DAG) const; |
| |
| SDValue LowerCall(TargetLowering::CallLoweringInfo &CLI, |
| SmallVectorImpl<SDValue> &InVals) const override; |
| |
| 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 LowerInterruptReturn(SmallVectorImpl<SDValue> &RetOps, |
| const SDLoc &DL, SelectionDAG &DAG) const; |
| |
| bool shouldSignExtendTypeInLibCall(EVT Type, bool IsSigned) const override; |
| |
| // Inline asm support |
| ConstraintType getConstraintType(StringRef Constraint) 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; |
| |
| /// This function parses registers that appear in inline-asm constraints. |
| /// It returns pair (0, 0) on failure. |
| std::pair<unsigned, const TargetRegisterClass *> |
| parseRegForInlineAsmConstraint(StringRef C, MVT VT) const; |
| |
| std::pair<unsigned, const TargetRegisterClass *> |
| getRegForInlineAsmConstraint(const TargetRegisterInfo *TRI, |
| StringRef Constraint, MVT VT) const override; |
| |
| /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops |
| /// vector. If it is invalid, don't add anything to Ops. If hasMemory is |
| /// true it means one of the asm constraint of the inline asm instruction |
| /// being processed is 'm'. |
| void LowerAsmOperandForConstraint(SDValue Op, |
| std::string &Constraint, |
| std::vector<SDValue> &Ops, |
| SelectionDAG &DAG) const override; |
| |
| unsigned |
| getInlineAsmMemConstraint(StringRef ConstraintCode) const override { |
| if (ConstraintCode == "R") |
| return InlineAsm::Constraint_R; |
| else if (ConstraintCode == "ZC") |
| return InlineAsm::Constraint_ZC; |
| return TargetLowering::getInlineAsmMemConstraint(ConstraintCode); |
| } |
| |
| bool isLegalAddressingMode(const DataLayout &DL, const AddrMode &AM, |
| Type *Ty, unsigned AS, |
| Instruction *I = nullptr) const override; |
| |
| bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const override; |
| |
| EVT getOptimalMemOpType(uint64_t Size, unsigned DstAlign, |
| unsigned SrcAlign, |
| bool IsMemset, bool ZeroMemset, |
| bool MemcpyStrSrc, |
| MachineFunction &MF) const override; |
| |
| /// isFPImmLegal - Returns true if the target can instruction select the |
| /// specified FP immediate natively. If false, the legalizer will |
| /// materialize the FP immediate as a load from a constant pool. |
| bool isFPImmLegal(const APFloat &Imm, EVT VT) const override; |
| |
| unsigned getJumpTableEncoding() const override; |
| bool useSoftFloat() const override; |
| |
| bool shouldInsertFencesForAtomic(const Instruction *I) const override { |
| return true; |
| } |
| |
| /// Emit a sign-extension using sll/sra, seb, or seh appropriately. |
| MachineBasicBlock *emitSignExtendToI32InReg(MachineInstr &MI, |
| MachineBasicBlock *BB, |
| unsigned Size, unsigned DstReg, |
| unsigned SrcRec) const; |
| |
| MachineBasicBlock *emitAtomicBinary(MachineInstr &MI, |
| MachineBasicBlock *BB) const; |
| MachineBasicBlock *emitAtomicBinaryPartword(MachineInstr &MI, |
| MachineBasicBlock *BB, |
| unsigned Size) const; |
| MachineBasicBlock *emitAtomicCmpSwap(MachineInstr &MI, |
| MachineBasicBlock *BB) const; |
| MachineBasicBlock *emitAtomicCmpSwapPartword(MachineInstr &MI, |
| MachineBasicBlock *BB, |
| unsigned Size) const; |
| MachineBasicBlock *emitSEL_D(MachineInstr &MI, MachineBasicBlock *BB) const; |
| MachineBasicBlock *emitPseudoSELECT(MachineInstr &MI, MachineBasicBlock *BB, |
| bool isFPCmp, unsigned Opc) const; |
| }; |
| |
| /// Create MipsTargetLowering objects. |
| const MipsTargetLowering * |
| createMips16TargetLowering(const MipsTargetMachine &TM, |
| const MipsSubtarget &STI); |
| const MipsTargetLowering * |
| createMipsSETargetLowering(const MipsTargetMachine &TM, |
| const MipsSubtarget &STI); |
| |
| namespace Mips { |
| |
| FastISel *createFastISel(FunctionLoweringInfo &funcInfo, |
| const TargetLibraryInfo *libInfo); |
| |
| } // end namespace Mips |
| |
| } // end namespace llvm |
| |
| #endif // LLVM_LIB_TARGET_MIPS_MIPSISELLOWERING_H |
