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 21 using namespace llvm; 22 23 bool BPFFrameLowering::hasFP(const MachineFunction &MF) const { return true; } 24 25 void BPFFrameLowering::emitPrologue(MachineFunction &MF, 26 MachineBasicBlock &MBB) const {} 27 28 void BPFFrameLowering::emitEpilogue(MachineFunction &MF, 29 MachineBasicBlock &MBB) const {} 30 31 void BPFFrameLowering::determineCalleeSaves(MachineFunction &MF, 32 BitVector &SavedRegs, 33 RegScavenger *RS) const { 34 TargetFrameLowering::determineCalleeSaves(MF, SavedRegs, RS); 35 SavedRegs.reset(BPF::R6); 36 SavedRegs.reset(BPF::R7); 37 SavedRegs.reset(BPF::R8); 38 SavedRegs.reset(BPF::R9); 39 } 40