1 //===-- BPFFrameLowering.h - Define frame lowering for BPF -----*- C++ -*--===// 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 class implements BPF-specific bits of TargetFrameLowering class. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_LIB_TARGET_BPF_BPFFRAMELOWERING_H 15 #define LLVM_LIB_TARGET_BPF_BPFFRAMELOWERING_H 16 17 #include "llvm/Target/TargetFrameLowering.h" 18 19 namespace llvm { 20 class BPFSubtarget; 21 22 class BPFFrameLowering : public TargetFrameLowering { 23 public: BPFFrameLowering(const BPFSubtarget & sti)24 explicit BPFFrameLowering(const BPFSubtarget &sti) 25 : TargetFrameLowering(TargetFrameLowering::StackGrowsDown, 8, 0) {} 26 27 void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override; 28 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override; 29 30 bool hasFP(const MachineFunction &MF) const override; 31 void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, 32 RegScavenger *RS) const override; 33 34 MachineBasicBlock::iterator eliminateCallFramePseudoInstr(MachineFunction & MF,MachineBasicBlock & MBB,MachineBasicBlock::iterator MI)35 eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, 36 MachineBasicBlock::iterator MI) const override { 37 return MBB.erase(MI); 38 } 39 }; 40 } 41 #endif 42