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 20 bool BPFFrameLowering::hasFPImpl(const MachineFunction &MF) const { 21 return true; 22 } 23 24 void BPFFrameLowering::emitPrologue(MachineFunction &MF, 25 MachineBasicBlock &MBB) const {} 26 27 void BPFFrameLowering::emitEpilogue(MachineFunction &MF, 28 MachineBasicBlock &MBB) const {} 29 30 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