LLVM  12.0.0git
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1 //===-- BPFFrameLowering.h - Define frame lowering for BPF -----*- C++ -*--===//
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 class implements BPF-specific bits of TargetFrameLowering class.
10 //
11 //===----------------------------------------------------------------------===//
18 namespace llvm {
19 class BPFSubtarget;
22 public:
23  explicit BPFFrameLowering(const BPFSubtarget &sti)
26  void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
27  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
29  bool hasFP(const MachineFunction &MF) const override;
30  void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
31  RegScavenger *RS) const override;
35  MachineBasicBlock::iterator MI) const override {
36  return MBB.erase(MI);
37  }
38 };
39 }
40 #endif
This class represents lattice values for constants.
Definition: AllocatorList.h:23
bool hasFP(const MachineFunction &MF) const override
hasFP - Return true if the specified function should have a dedicated frame pointer register...
void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, RegScavenger *RS) const override
This method determines which of the registers reported by TargetRegisterInfo::getCalleeSavedRegs() sh...
void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override
emitProlog/emitEpilog - These methods insert prolog and epilog code into the function.
MachineBasicBlock & MBB
instr_iterator erase(instr_iterator I)
Remove an instruction from the instruction list and delete it.
This struct is a compact representation of a valid (non-zero power of two) alignment.
Definition: Alignment.h:39
Information about stack frame layout on the target.
BPFFrameLowering(const BPFSubtarget &sti)
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override
IRTranslator LLVM IR MI
MachineBasicBlock::iterator eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MI) const override
This method is called during prolog/epilog code insertion to eliminate call frame setup and destroy p...