//===-- BPFFrameLowering.h - Define frame lowering for BPF -----*- 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 class implements BPF-specific bits of TargetFrameLowering class.

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_TARGET_BPF_BPFFRAMELOWERING_H

#define LLVM_LIB_TARGET_BPF_BPFFRAMELOWERING_H

#include "llvm/CodeGen/TargetFrameLowering.h"

namespace llvm {

class BPFSubtarget;

class BPFFrameLowering : public TargetFrameLowering {

public:

  explicit BPFFrameLowering(const BPFSubtarget &sti)

      : TargetFrameLowering(TargetFrameLowering::StackGrowsDown, Align(8), 0) {}

  void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;

  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;

  bool hasFP(const MachineFunction &MF) const override;

  void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,

                            RegScavenger *RS) const override;

  MachineBasicBlock::iterator

  eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,

                                MachineBasicBlock::iterator MI) const override {

    return MBB.erase(MI);

  }

};

}

#endif