AVRFrameLowering.h

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//===-- AVRFrameLowering.h - Define frame lowering for AVR ------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_AVR_FRAME_LOWERING_H
#define LLVM_AVR_FRAME_LOWERING_H

#include "llvm/CodeGen/TargetFrameLowering.h"

namespace llvm {

/// Utilities for creating function call frames.
class AVRFrameLowering : public TargetFrameLowering {
public:
  explicit AVRFrameLowering();

public:
  void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
  bool hasFP(const MachineFunction &MF) const override;
  bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
                                 MachineBasicBlock::iterator MI,
                                 const std::vector<CalleeSavedInfo> &CSI,
                                 const TargetRegisterInfo *TRI) const override;
  bool
  restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
                              MachineBasicBlock::iterator MI,
                              std::vector<CalleeSavedInfo> &CSI,
                              const TargetRegisterInfo *TRI) const override;
  bool hasReservedCallFrame(const MachineFunction &MF) const override;
  bool canSimplifyCallFramePseudos(const MachineFunction &MF) const override;
  void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
                            RegScavenger *RS = nullptr) const override;
  MachineBasicBlock::iterator
  eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
                                MachineBasicBlock::iterator MI) const override;
};

} // end namespace llvm

#endif // LLVM_AVR_FRAME_LOWERING_H