BPFFrameLowering.h revision 360784 
1//===-- BPFFrameLowering.h - Define frame lowering for BPF -----*- C++ -*--===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This class implements BPF-specific bits of TargetFrameLowering class.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_LIB_TARGET_BPF_BPFFRAMELOWERING_H
14#define LLVM_LIB_TARGET_BPF_BPFFRAMELOWERING_H
15
16#include "llvm/CodeGen/TargetFrameLowering.h"
17
18namespace llvm {
19class BPFSubtarget;
20
21class BPFFrameLowering : public TargetFrameLowering {
22public:
23  explicit BPFFrameLowering(const BPFSubtarget &sti)
24      : TargetFrameLowering(TargetFrameLowering::StackGrowsDown, Align(8), 0) {}
25
26  void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
27  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
28
29  bool hasFP(const MachineFunction &MF) const override;
30  void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
31                            RegScavenger *RS) const override;
32
33  MachineBasicBlock::iterator
34  eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
35                                MachineBasicBlock::iterator MI) const override {
36    return MBB.erase(MI);
37  }
38};
39}
40#endif
41