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