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