1//===-- BPFFrameLowering.cpp - BPF Frame Information ----------------------===//
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 file contains the BPF implementation of TargetFrameLowering class.
10//
11//===----------------------------------------------------------------------===//
12
13#include "BPFFrameLowering.h"
14#include "BPFInstrInfo.h"
15#include "BPFSubtarget.h"
16#include "llvm/CodeGen/MachineFrameInfo.h"
17#include "llvm/CodeGen/MachineFunction.h"
18#include "llvm/CodeGen/MachineInstrBuilder.h"
19#include "llvm/CodeGen/MachineRegisterInfo.h"
20
21using namespace llvm;
22
23bool BPFFrameLowering::hasFP(const MachineFunction &MF) const { return true; }
24
25void BPFFrameLowering::emitPrologue(MachineFunction &MF,
26 MachineBasicBlock &MBB) const {}
27
28void BPFFrameLowering::emitEpilogue(MachineFunction &MF,
29 MachineBasicBlock &MBB) const {}
30
31void BPFFrameLowering::determineCalleeSaves(MachineFunction &MF,
32 BitVector &SavedRegs,
33 RegScavenger *RS) const {
34 TargetFrameLowering::determineCalleeSaves(MF, SavedRegs, RS);
35 SavedRegs.reset(Idx: BPF::R6);
36 SavedRegs.reset(Idx: BPF::R7);
37 SavedRegs.reset(Idx: BPF::R8);
38 SavedRegs.reset(Idx: BPF::R9);
39}
40