1 //==-- AArch64FrameLowering.h - TargetFrameLowering for AArch64 --*- C++ -*-==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_LIB_TARGET_AARCH64_AARCH64FRAMELOWERING_H
15 #define LLVM_LIB_TARGET_AARCH64_AARCH64FRAMELOWERING_H
17 #include "llvm/Target/TargetFrameLowering.h"
21 class AArch64FrameLowering : public TargetFrameLowering {
23 explicit AArch64FrameLowering()
24 : TargetFrameLowering(StackGrowsDown, 16, 0, 16,
25 false /*StackRealignable*/) {}
27 void emitCalleeSavedFrameMoves(MachineBasicBlock &MBB,
28 MachineBasicBlock::iterator MBBI,
29 unsigned FramePtr) const;
31 void eliminateCallFramePseudoInstr(MachineFunction &MF,
32 MachineBasicBlock &MBB,
33 MachineBasicBlock::iterator I) const override;
35 /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
37 void emitPrologue(MachineFunction &MF) const override;
38 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
40 int getFrameIndexOffset(const MachineFunction &MF, int FI) const override;
41 int getFrameIndexReference(const MachineFunction &MF, int FI,
42 unsigned &FrameReg) const override;
43 int resolveFrameIndexReference(const MachineFunction &MF, int FI,
45 bool PreferFP = false) const;
46 bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
47 MachineBasicBlock::iterator MI,
48 const std::vector<CalleeSavedInfo> &CSI,
49 const TargetRegisterInfo *TRI) const override;
51 bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
52 MachineBasicBlock::iterator MI,
53 const std::vector<CalleeSavedInfo> &CSI,
54 const TargetRegisterInfo *TRI) const override;
56 /// \brief Can this function use the red zone for local allocations.
57 bool canUseRedZone(const MachineFunction &MF) const;
59 bool hasFP(const MachineFunction &MF) const override;
60 bool hasReservedCallFrame(const MachineFunction &MF) const override;
62 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
63 RegScavenger *RS) const override;
66 } // End llvm namespace