lib/Target/BPF/BPFFrameLowering.h

   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/CodeGen/TargetFrameLowering.h"
  18
  19 namespace llvm {
  20 class BPFSubtarget;
  21
  22 class BPFFrameLowering : public TargetFrameLowering {
  23 public:
  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
  35   eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
  36                                 MachineBasicBlock::iterator MI) const override {
  37     return MBB.erase(MI);
  38   }
  39 };
  40 }
  41 #endif