llvm-mirror/lib/Target/VE/VEISelLowering.h

//===-- VEISelLowering.h - VE DAG Lowering Interface ------------*- C++ -*-===//
//
// 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 VE uses to lower LLVM code into a
// selection DAG.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_TARGET_VE_VEISELLOWERING_H
#define LLVM_LIB_TARGET_VE_VEISELLOWERING_H

#include "VE.h"
#include "llvm/CodeGen/TargetLowering.h"

namespace llvm {
class VESubtarget;

namespace VEISD {
enum NodeType : unsigned {
  FIRST_NUMBER = ISD::BUILTIN_OP_END,
  RET_FLAG, // Return with a flag operand.
};
}

class VETargetLowering : public TargetLowering {
  const VESubtarget *Subtarget;

public:
  VETargetLowering(const TargetMachine &TM, const VESubtarget &STI);

  const char *getTargetNodeName(unsigned Opcode) const override;

  Register getRegisterByName(const char *RegName, LLT VT,
                             const MachineFunction &MF) const override;

  /// getSetCCResultType - Return the ISD::SETCC ValueType
  EVT getSetCCResultType(const DataLayout &DL, LLVMContext &Context,
                         EVT VT) const override;

  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> &ArgsFlags,
                      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;
};
} // namespace llvm

#endif // VE_ISELLOWERING_H