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 "BPFSubtarget.h"
15#include "llvm/CodeGen/MachineFrameInfo.h"
16#include "llvm/CodeGen/MachineFunction.h"
17
18using namespace llvm;
19
20bool BPFFrameLowering::hasFPImpl(const MachineFunction &MF) const {
21 return true;
22}
23
24void BPFFrameLowering::emitPrologue(MachineFunction &MF,
25 MachineBasicBlock &MBB) const {}
26
27void BPFFrameLowering::emitEpilogue(MachineFunction &MF,
28 MachineBasicBlock &MBB) const {}
29
30void BPFFrameLowering::determineCalleeSaves(MachineFunction &MF,
31 BitVector &SavedRegs,
32 RegScavenger *RS) const {
33 TargetFrameLowering::determineCalleeSaves(MF, SavedRegs, RS);
34 SavedRegs.reset(Idx: BPF::R6);
35 SavedRegs.reset(Idx: BPF::R7);
36 SavedRegs.reset(Idx: BPF::R8);
37 SavedRegs.reset(Idx: BPF::R9);
38}
39