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//===-- CSKYISelLowering.cpp - CSKY DAG Lowering Implementation ----------===//
//
// 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 CSKY uses to lower LLVM code into a
// selection DAG.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_CSKY_CSKYISELLOWERING_H
#define LLVM_LIB_TARGET_CSKY_CSKYISELLOWERING_H
#include "MCTargetDesc/CSKYBaseInfo.h"
#include "llvm/CodeGen/CallingConvLower.h"
#include "llvm/CodeGen/TargetLowering.h"
namespace llvm {
class CSKYSubtarget;
namespace CSKYISD {
enum NodeType : unsigned {
FIRST_NUMBER = ISD::BUILTIN_OP_END,
NIE,
NIR,
RET,
BITCAST_TO_LOHI
};
}
class CSKYTargetLowering : public TargetLowering {
const CSKYSubtarget &Subtarget;
public:
explicit CSKYTargetLowering(const TargetMachine &TM,
const CSKYSubtarget &STI);
EVT getSetCCResultType(const DataLayout &DL, LLVMContext &Context,
EVT VT) const override;
private:
SDValue LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv,
bool IsVarArg,
const SmallVectorImpl<ISD::InputArg> &Ins,
const SDLoc &DL, SelectionDAG &DAG,
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;
const char *getTargetNodeName(unsigned Opcode) const override;
CCAssignFn *CCAssignFnForCall(CallingConv::ID CC, bool IsVarArg) const;
CCAssignFn *CCAssignFnForReturn(CallingConv::ID CC, bool IsVarArg) const;
};
} // namespace llvm
#endif // LLVM_LIB_TARGET_CSKY_CSKYISELLOWERING_H
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