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AVRFrameLowering.h
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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 
13 
14 namespace llvm {
15 
16 /// Utilities for creating function call frames.
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 hasFP(const MachineFunction &MF) const override;
27  const std::vector<CalleeSavedInfo> &CSI,
28  const TargetRegisterInfo *TRI) const override;
29  bool
32  std::vector<CalleeSavedInfo> &CSI,
33  const TargetRegisterInfo *TRI) const override;
34  bool hasReservedCallFrame(const MachineFunction &MF) const override;
35  bool canSimplifyCallFramePseudos(const MachineFunction &MF) const override;
36  void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
37  RegScavenger *RS = nullptr) const override;
40  MachineBasicBlock::iterator MI) const override;
41 };
42 
43 } // end namespace llvm
44 
45 #endif // LLVM_AVR_FRAME_LOWERING_H
This class represents lattice values for constants.
Definition: AllocatorList.h:23
unsigned const TargetRegisterInfo * TRI
bool hasReservedCallFrame(const MachineFunction &MF) const override
hasReservedCallFrame - Under normal circumstances, when a frame pointer is not required, we reserve argument space for call sites in the function immediately on entry to the current function.
bool canSimplifyCallFramePseudos(const MachineFunction &MF) const override
canSimplifyCallFramePseudos - When possible, it&#39;s best to simplify the call frame pseudo ops before d...
TargetRegisterInfo base class - We assume that the target defines a static array of TargetRegisterDes...
void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, RegScavenger *RS=nullptr) const override
This method determines which of the registers reported by TargetRegisterInfo::getCalleeSavedRegs() sh...
Information about stack frame layout on the target.
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override
bool hasFP(const MachineFunction &MF) const override
hasFP - Return true if the specified function should have a dedicated frame pointer register...
Utilities for creating function call frames.
void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override
emitProlog/emitEpilog - These methods insert prolog and epilog code into the function.
bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, std::vector< CalleeSavedInfo > &CSI, const TargetRegisterInfo *TRI) const override
restoreCalleeSavedRegisters - Issues instruction(s) to restore all callee saved registers and returns...
bool spillCalleeSavedRegisters(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, const std::vector< CalleeSavedInfo > &CSI, const TargetRegisterInfo *TRI) const override
spillCalleeSavedRegisters - Issues instruction(s) to spill all callee saved registers and returns tru...
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...
IRTranslator LLVM IR MI