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
18 using namespace llvm;
19
hasFPImpl(const MachineFunction & MF) const20 bool BPFFrameLowering::hasFPImpl(const MachineFunction &MF) const {
21 return true;
22 }
23
emitPrologue(MachineFunction & MF,MachineBasicBlock & MBB) const24 void BPFFrameLowering::emitPrologue(MachineFunction &MF,
25 MachineBasicBlock &MBB) const {}
26
emitEpilogue(MachineFunction & MF,MachineBasicBlock & MBB) const27 void BPFFrameLowering::emitEpilogue(MachineFunction &MF,
28 MachineBasicBlock &MBB) const {}
29
determineCalleeSaves(MachineFunction & MF,BitVector & SavedRegs,RegScavenger * RS) const30 void BPFFrameLowering::determineCalleeSaves(MachineFunction &MF,
31 BitVector &SavedRegs,
32 RegScavenger *RS) const {
33 TargetFrameLowering::determineCalleeSaves(MF, SavedRegs, RS);
34 SavedRegs.reset(BPF::R6);
35 SavedRegs.reset(BPF::R7);
36 SavedRegs.reset(BPF::R8);
37 SavedRegs.reset(BPF::R9);
38 }
39