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//===-- ARM64FrameLowering.h - TargetFrameLowering for ARM64 ----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//
//
//===----------------------------------------------------------------------===//
#ifndef ARM64_FRAMELOWERING_H
#define ARM64_FRAMELOWERING_H
#include "llvm/Target/TargetFrameLowering.h"
namespace llvm {
class ARM64Subtarget;
class ARM64TargetMachine;
class ARM64FrameLowering : public TargetFrameLowering {
const ARM64TargetMachine &TM;
public:
explicit ARM64FrameLowering(const ARM64TargetMachine &TM,
const ARM64Subtarget &STI)
: TargetFrameLowering(StackGrowsDown, 16, 0, 16,
false /*StackRealignable*/),
TM(TM) {}
void emitCalleeSavedFrameMoves(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MBBI,
unsigned FramePtr) const;
void eliminateCallFramePseudoInstr(MachineFunction &MF,
MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const;
/// emitProlog/emitEpilog - These methods insert prolog and epilog code into
/// the function.
void emitPrologue(MachineFunction &MF) const;
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
int getFrameIndexOffset(const MachineFunction &MF, int FI) const;
int getFrameIndexReference(const MachineFunction &MF, int FI,
unsigned &FrameReg) const;
int resolveFrameIndexReference(const MachineFunction &MF, int FI,
unsigned &FrameReg,
bool PreferFP = false) const;
bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
const std::vector<CalleeSavedInfo> &CSI,
const TargetRegisterInfo *TRI) const;
bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
const std::vector<CalleeSavedInfo> &CSI,
const TargetRegisterInfo *TRI) const;
/// \brief Can this function use the red zone for local allocations.
bool canUseRedZone(const MachineFunction &MF) const;
bool hasFP(const MachineFunction &MF) const;
bool hasReservedCallFrame(const MachineFunction &MF) const;
void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
RegScavenger *RS) const;
};
} // End llvm namespace
#endif
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