MSP430MachineFunctionInfo.h

//=== MSP430MachineFunctionInfo.h - MSP430 machine function info -*- 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 declares MSP430-specific per-machine-function information.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_TARGET_MSP430_MSP430MACHINEFUNCTIONINFO_H
#define LLVM_LIB_TARGET_MSP430_MSP430MACHINEFUNCTIONINFO_H

#include "llvm/CodeGen/MachineFunction.h"

namespace llvm {

/// MSP430MachineFunctionInfo - This class is derived from MachineFunction and
/// contains private MSP430 target-specific information for each MachineFunction.
class MSP430MachineFunctionInfo : public MachineFunctionInfo {
  virtual void anchor();

  /// CalleeSavedFrameSize - Size of the callee-saved register portion of the
  /// stack frame in bytes.
  unsigned CalleeSavedFrameSize = 0;

  /// ReturnAddrIndex - FrameIndex for return slot.
  int ReturnAddrIndex = 0;

  /// VarArgsFrameIndex - FrameIndex for start of varargs area.
  int VarArgsFrameIndex = 0;

  /// SRetReturnReg - Some subtargets require that sret lowering includes
  /// returning the value of the returned struct in a register. This field
  /// holds the virtual register into which the sret argument is passed.
  Register SRetReturnReg;

public:
  MSP430MachineFunctionInfo() = default;

  MSP430MachineFunctionInfo(const Function &F, const TargetSubtargetInfo *STI)
      : CalleeSavedFrameSize(0), ReturnAddrIndex(0), SRetReturnReg(0) {}

  MachineFunctionInfo *
  clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
        const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
      const override;

  unsigned getCalleeSavedFrameSize() const { return CalleeSavedFrameSize; }
  void setCalleeSavedFrameSize(unsigned bytes) { CalleeSavedFrameSize = bytes; }

  Register getSRetReturnReg() const { return SRetReturnReg; }
  void setSRetReturnReg(Register Reg) { SRetReturnReg = Reg; }

  int getRAIndex() const { return ReturnAddrIndex; }
  void setRAIndex(int Index) { ReturnAddrIndex = Index; }

  int getVarArgsFrameIndex() const { return VarArgsFrameIndex;}
  void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
};

} // End llvm namespace

#endif