ad4a582fd9
Some targets (e.g. PPC and Hexagon) already did this. I think it's best to do this consistently so that frontend authors don't run into inconsistent results when they emit `naked` functions. For example, in Zig, we had to change our emit code to also set `frame-pointer=none` to get reliable results across targets. Note: I don't have commit access.
48 lines
1.9 KiB
C++
48 lines
1.9 KiB
C++
//===-- AVRFrameLowering.h - Define frame lowering for AVR ------*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_AVR_FRAME_LOWERING_H
|
|
#define LLVM_AVR_FRAME_LOWERING_H
|
|
|
|
#include "llvm/CodeGen/TargetFrameLowering.h"
|
|
|
|
namespace llvm {
|
|
|
|
/// Utilities for creating function call frames.
|
|
class AVRFrameLowering : public TargetFrameLowering {
|
|
public:
|
|
explicit AVRFrameLowering();
|
|
|
|
public:
|
|
void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
|
|
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
|
|
bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MI,
|
|
ArrayRef<CalleeSavedInfo> CSI,
|
|
const TargetRegisterInfo *TRI) const override;
|
|
bool
|
|
restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MI,
|
|
MutableArrayRef<CalleeSavedInfo> CSI,
|
|
const TargetRegisterInfo *TRI) const override;
|
|
bool hasReservedCallFrame(const MachineFunction &MF) const override;
|
|
bool canSimplifyCallFramePseudos(const MachineFunction &MF) const override;
|
|
void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
|
|
RegScavenger *RS = nullptr) const override;
|
|
MachineBasicBlock::iterator
|
|
eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator MI) const override;
|
|
|
|
protected:
|
|
bool hasFPImpl(const MachineFunction &MF) const override;
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif // LLVM_AVR_FRAME_LOWERING_H
|