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Diffstat (limited to 'lib/Target/Hexagon/HexagonISelLowering.h')
| -rw-r--r-- | lib/Target/Hexagon/HexagonISelLowering.h | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/lib/Target/Hexagon/HexagonISelLowering.h b/lib/Target/Hexagon/HexagonISelLowering.h new file mode 100644 index 0000000000..b327615f8c --- /dev/null +++ b/lib/Target/Hexagon/HexagonISelLowering.h @@ -0,0 +1,162 @@ +//==-- 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 "llvm/Target/TargetLowering.h" +#include "llvm/CallingConv.h" +#include "llvm/CodeGen/CallingConvLower.h" +#include "Hexagon.h" + +namespace llvm { + namespace HexagonISD { + enum { + FIRST_NUMBER = ISD::BUILTIN_OP_END, + + CONST32, + CONST32_GP, // For marking data present in GP. + 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, + TC_RETURN + }; + } + + class HexagonTargetLowering : public TargetLowering { + int VarArgsFrameOffset; // Frame offset to start of varargs area. + + bool CanReturnSmallStruct(const Function* CalleeFn, + unsigned& RetSize) const; + + public: + HexagonTargetMachine &TM; + explicit HexagonTargetLowering(HexagonTargetMachine &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; + + virtual bool isTruncateFree(Type *Ty1, Type *Ty2) const; + virtual bool isTruncateFree(EVT VT1, EVT VT2) const; + + virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const; + + virtual const char *getTargetNodeName(unsigned Opcode) const; + 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 LowerFormalArguments(SDValue Chain, + CallingConv::ID CallConv, bool isVarArg, + const SmallVectorImpl<ISD::InputArg> &Ins, + DebugLoc dl, SelectionDAG &DAG, + SmallVectorImpl<SDValue> &InVals) const; + SDValue LowerGLOBALADDRESS(SDValue Op, SelectionDAG &DAG) const; + + SDValue LowerCall(SDValue Chain, SDValue Callee, + CallingConv::ID CallConv, bool isVarArg, + bool &isTailCall, + const SmallVectorImpl<ISD::OutputArg> &Outs, + const SmallVectorImpl<SDValue> &OutVals, + const SmallVectorImpl<ISD::InputArg> &Ins, + DebugLoc dl, SelectionDAG &DAG, + SmallVectorImpl<SDValue> &InVals) const; + + SDValue LowerCallResult(SDValue Chain, SDValue InFlag, + CallingConv::ID CallConv, bool isVarArg, + const SmallVectorImpl<ISD::InputArg> &Ins, + DebugLoc dl, SelectionDAG &DAG, + SmallVectorImpl<SDValue> &InVals, + const SmallVectorImpl<SDValue> &OutVals, + SDValue Callee) const; + + SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const; + SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const; + SDValue LowerMEMBARRIER(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, + DebugLoc dl, SelectionDAG &DAG) const; + + virtual MachineBasicBlock + *EmitInstrWithCustomInserter(MachineInstr *MI, + MachineBasicBlock *BB) const; + + SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) const; + virtual EVT getSetCCResultType(EVT VT) const { + return MVT::i1; + } + + virtual bool getPostIndexedAddressParts(SDNode *N, SDNode *Op, + SDValue &Base, SDValue &Offset, + ISD::MemIndexedMode &AM, + SelectionDAG &DAG) const; + + std::pair<unsigned, const TargetRegisterClass*> + getRegForInlineAsmConstraint(const std::string &Constraint, + EVT VT) const; + + // Intrinsics + virtual 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. + virtual bool isLegalAddressingMode(const AddrMode &AM, Type *Ty) const; + + /// 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. + virtual bool isLegalICmpImmediate(int64_t Imm) const; + }; +} // end namespace llvm + +#endif // Hexagon_ISELLOWERING_H |