llvm/lib/Target/AVR/AVRFrameLowering.h

   1 //===-- AVRFrameLowering.h - Define frame lowering for AVR ------*- 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 #ifndef LLVM_AVR_FRAME_LOWERING_H
  10 #define LLVM_AVR_FRAME_LOWERING_H
  11
  12 #include "llvm/CodeGen/TargetFrameLowering.h"
  13
  14 namespace llvm {
  15
  16 /// Utilities for creating function call frames.
  17 class AVRFrameLowering : public TargetFrameLowering {
  18 public:
  19   explicit AVRFrameLowering();
  20
  21 public:
  22   void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
  23   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
  24   bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
  25                                  MachineBasicBlock::iterator MI,
  26                                  ArrayRef<CalleeSavedInfo> CSI,
  27                                  const TargetRegisterInfo *TRI) const override;
  28   bool
  29   restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
  30                               MachineBasicBlock::iterator MI,
  31                               MutableArrayRef<CalleeSavedInfo> CSI,
  32                               const TargetRegisterInfo *TRI) const override;
  33   bool hasReservedCallFrame(const MachineFunction &MF) const override;
  34   bool canSimplifyCallFramePseudos(const MachineFunction &MF) const override;
  35   void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
  36                             RegScavenger *RS = nullptr) const override;
  37   MachineBasicBlock::iterator
  38   eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
  39                                 MachineBasicBlock::iterator MI) const override;
  40
  41 protected:
  42   bool hasFPImpl(const MachineFunction &MF) const override;
  43 };
  44
  45 } // end namespace llvm
  46
  47 #endif // LLVM_AVR_FRAME_LOWERING_H