| //===-- HexagonISelLowering.h - Hexagon 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 Hexagon uses to lower LLVM code into a |
| // selection DAG. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef Hexagon_ISELLOWERING_H |
| #define Hexagon_ISELLOWERING_H |
| |
| #include "Hexagon.h" |
| #include "llvm/CodeGen/CallingConvLower.h" |
| #include "llvm/IR/CallingConv.h" |
| #include "llvm/Target/TargetLowering.h" |
| |
| namespace llvm { |
| namespace HexagonISD { |
| enum { |
| FIRST_NUMBER = ISD::BUILTIN_OP_END, |
| |
| CONST32, |
| CONST32_GP, // For marking data present in GP. |
| CONST32_Int_Real, |
| FCONST32, |
| SETCC, |
| ADJDYNALLOC, |
| ARGEXTEND, |
| |
| CMPICC, // Compare two GPR operands, set icc. |
| CMPFCC, // Compare two FP operands, set fcc. |
| BRICC, // Branch to dest on icc condition |
| BRFCC, // Branch to dest on fcc condition |
| SELECT_ICC, // Select between two values using the current ICC flags. |
| SELECT_FCC, // Select between two values using the current FCC flags. |
| |
| Hi, Lo, // Hi/Lo operations, typically on a global address. |
| |
| FTOI, // FP to Int within a FP register. |
| ITOF, // Int to FP within a FP register. |
| |
| CALL, // A call instruction. |
| RET_FLAG, // Return with a flag operand. |
| BR_JT, // Jump table. |
| BARRIER, // Memory barrier. |
| WrapperJT, |
| WrapperCP, |
| WrapperCombineII, |
| WrapperCombineRR, |
| WrapperCombineRI_V4, |
| WrapperCombineIR_V4, |
| WrapperPackhl, |
| WrapperSplatB, |
| WrapperSplatH, |
| WrapperShuffEB, |
| WrapperShuffEH, |
| WrapperShuffOB, |
| WrapperShuffOH, |
| TC_RETURN, |
| EH_RETURN |
| }; |
| } |
| |
| class HexagonTargetLowering : public TargetLowering { |
| int VarArgsFrameOffset; // Frame offset to start of varargs area. |
| |
| bool CanReturnSmallStruct(const Function* CalleeFn, |
| unsigned& RetSize) const; |
| |
| public: |
| const TargetMachine &TM; |
| explicit HexagonTargetLowering(const TargetMachine &targetmachine); |
| |
| /// IsEligibleForTailCallOptimization - Check whether the call is eligible |
| /// for tail call optimization. Targets which want to do tail call |
| /// optimization should implement this function. |
| bool |
| IsEligibleForTailCallOptimization(SDValue Callee, |
| CallingConv::ID CalleeCC, |
| bool isVarArg, |
| bool isCalleeStructRet, |
| bool isCallerStructRet, |
| const |
| SmallVectorImpl<ISD::OutputArg> &Outs, |
| const SmallVectorImpl<SDValue> &OutVals, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| SelectionDAG& DAG) const; |
| |
| bool isTruncateFree(Type *Ty1, Type *Ty2) const override; |
| bool isTruncateFree(EVT VT1, EVT VT2) const override; |
| |
| bool allowTruncateForTailCall(Type *Ty1, Type *Ty2) const override; |
| |
| SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override; |
| |
| const char *getTargetNodeName(unsigned Opcode) const override; |
| SDValue LowerBR_JT(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerINLINEASM(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerEH_LABEL(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFormalArguments(SDValue Chain, |
| CallingConv::ID CallConv, bool isVarArg, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| SDLoc dl, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals) const override; |
| SDValue LowerGLOBALADDRESS(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const; |
| |
| SDValue LowerCall(TargetLowering::CallLoweringInfo &CLI, |
| SmallVectorImpl<SDValue> &InVals) const override; |
| |
| SDValue LowerCallResult(SDValue Chain, SDValue InFlag, |
| CallingConv::ID CallConv, bool isVarArg, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| SDLoc dl, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals, |
| const SmallVectorImpl<SDValue> &OutVals, |
| SDValue Callee) const; |
| |
| SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerATOMIC_FENCE(SDValue Op, SelectionDAG& DAG) const; |
| SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const; |
| |
| SDValue LowerReturn(SDValue Chain, |
| CallingConv::ID CallConv, bool isVarArg, |
| const SmallVectorImpl<ISD::OutputArg> &Outs, |
| const SmallVectorImpl<SDValue> &OutVals, |
| SDLoc dl, SelectionDAG &DAG) const override; |
| |
| MachineBasicBlock * |
| EmitInstrWithCustomInserter(MachineInstr *MI, |
| MachineBasicBlock *BB) const override; |
| |
| SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) const; |
| EVT getSetCCResultType(LLVMContext &C, EVT VT) const override { |
| if (!VT.isVector()) |
| return MVT::i1; |
| else |
| return EVT::getVectorVT(C, MVT::i1, VT.getVectorNumElements()); |
| } |
| |
| bool getPostIndexedAddressParts(SDNode *N, SDNode *Op, |
| SDValue &Base, SDValue &Offset, |
| ISD::MemIndexedMode &AM, |
| SelectionDAG &DAG) const override; |
| |
| std::pair<unsigned, const TargetRegisterClass*> |
| getRegForInlineAsmConstraint(const std::string &Constraint, |
| MVT VT) const override; |
| |
| // Intrinsics |
| SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const; |
| /// isLegalAddressingMode - Return true if the addressing mode represented |
| /// by AM is legal for this target, for a load/store of the specified type. |
| /// The type may be VoidTy, in which case only return true if the addressing |
| /// mode is legal for a load/store of any legal type. |
| /// TODO: Handle pre/postinc as well. |
| bool isLegalAddressingMode(const AddrMode &AM, Type *Ty) const override; |
| bool isFPImmLegal(const APFloat &Imm, EVT VT) const override; |
| |
| /// isLegalICmpImmediate - Return true if the specified immediate is legal |
| /// icmp immediate, that is the target has icmp instructions which can |
| /// compare a register against the immediate without having to materialize |
| /// the immediate into a register. |
| bool isLegalICmpImmediate(int64_t Imm) const override; |
| }; |
| } // end namespace llvm |
| |
| #endif // Hexagon_ISELLOWERING_H |
