1//===-- BPFFrameLowering.cpp - BPF Frame Information ----------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file contains the BPF implementation of TargetFrameLowering class.
11//
12//===----------------------------------------------------------------------===//
13
14#include "BPFFrameLowering.h"
15#include "BPFInstrInfo.h"
16#include "BPFSubtarget.h"
17#include "llvm/CodeGen/MachineFrameInfo.h"
18#include "llvm/CodeGen/MachineFunction.h"
19#include "llvm/CodeGen/MachineInstrBuilder.h"
20#include "llvm/CodeGen/MachineRegisterInfo.h"
21
22using namespace llvm;
23
24bool BPFFrameLowering::hasFP(const MachineFunction &MF) const { return true; }
25
26void BPFFrameLowering::emitPrologue(MachineFunction &MF,
27                                    MachineBasicBlock &MBB) const {}
28
29void BPFFrameLowering::emitEpilogue(MachineFunction &MF,
30                                    MachineBasicBlock &MBB) const {}
31
32void BPFFrameLowering::determineCalleeSaves(MachineFunction &MF,
33                                            BitVector &SavedRegs,
34                                            RegScavenger *RS) const {
35  TargetFrameLowering::determineCalleeSaves(MF, SavedRegs, RS);
36  SavedRegs.reset(BPF::R6);
37  SavedRegs.reset(BPF::R7);
38  SavedRegs.reset(BPF::R8);
39  SavedRegs.reset(BPF::R9);
40}
41