MSP430FrameLowering.h

//==- MSP430FrameLowering.h - Define frame lowering for MSP430 --*- 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
//
//===----------------------------------------------------------------------===//
//
//
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_TARGET_MSP430_MSP430FRAMELOWERING_H
#define LLVM_LIB_TARGET_MSP430_MSP430FRAMELOWERING_H

#include "MSP430.h"
#include "llvm/CodeGen/TargetFrameLowering.h"

namespace llvm {

class MSP430Subtarget;
class MSP430InstrInfo;
class MSP430RegisterInfo;

class MSP430FrameLowering : public TargetFrameLowering {
protected:

public:
  MSP430FrameLowering(const MSP430Subtarget &STI);

  const MSP430Subtarget &STI;
  const MSP430InstrInfo &TII;
  const MSP430RegisterInfo *TRI;

  /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
  /// the function.
  void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;

  MachineBasicBlock::iterator
  eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
                                MachineBasicBlock::iterator I) const override;

  bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
                                 MachineBasicBlock::iterator MI,
                                 ArrayRef<CalleeSavedInfo> CSI,
                                 const TargetRegisterInfo *TRI) const override;
  bool
  restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
                              MachineBasicBlock::iterator MI,
                              MutableArrayRef<CalleeSavedInfo> CSI,
                              const TargetRegisterInfo *TRI) const override;

  bool hasFP(const MachineFunction &MF) const override;
  bool hasReservedCallFrame(const MachineFunction &MF) const override;
  void processFunctionBeforeFrameFinalized(MachineFunction &MF,
                                     RegScavenger *RS = nullptr) const override;

  /// Wraps up getting a CFI index and building a MachineInstr for it.
  void BuildCFI(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
                const DebugLoc &DL, const MCCFIInstruction &CFIInst,
                MachineInstr::MIFlag Flag = MachineInstr::NoFlags) const;

  void emitCalleeSavedFrameMoves(MachineBasicBlock &MBB,
                                 MachineBasicBlock::iterator MBBI,
                                 const DebugLoc &DL, bool IsPrologue) const;
};

} // End llvm namespace

#endif