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 AArch64_FRAMELOWERING_H
15 #define AArch64_FRAMELOWERING_H
17 #include "llvm/Target/TargetFrameLowering.h"
21 class AArch64Subtarget;
22 class AArch64TargetMachine;
24 class AArch64FrameLowering : public TargetFrameLowering {
25 const AArch64TargetMachine &TM;
28 explicit AArch64FrameLowering(const AArch64TargetMachine &TM,
29 const AArch64Subtarget &STI)
30 : TargetFrameLowering(StackGrowsDown, 16, 0, 16,
31 false /*StackRealignable*/),
34 void emitCalleeSavedFrameMoves(MachineBasicBlock &MBB,
35 MachineBasicBlock::iterator MBBI,
36 unsigned FramePtr) const;
38 void eliminateCallFramePseudoInstr(MachineFunction &MF,
39 MachineBasicBlock &MBB,
40 MachineBasicBlock::iterator I) const override;
42 /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
44 void emitPrologue(MachineFunction &MF) const override;
45 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
47 int getFrameIndexOffset(const MachineFunction &MF, int FI) const override;
48 int getFrameIndexReference(const MachineFunction &MF, int FI,
49 unsigned &FrameReg) const override;
50 int resolveFrameIndexReference(const MachineFunction &MF, int FI,
52 bool PreferFP = false) const;
53 bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
54 MachineBasicBlock::iterator MI,
55 const std::vector<CalleeSavedInfo> &CSI,
56 const TargetRegisterInfo *TRI) const override;
58 bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
59 MachineBasicBlock::iterator MI,
60 const std::vector<CalleeSavedInfo> &CSI,
61 const TargetRegisterInfo *TRI) const override;
63 /// \brief Can this function use the red zone for local allocations.
64 bool canUseRedZone(const MachineFunction &MF) const;
66 bool hasFP(const MachineFunction &MF) const override;
67 bool hasReservedCallFrame(const MachineFunction &MF) const override;
69 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
70 RegScavenger *RS) const override;
73 } // End llvm namespace