lib/Target/AArch64/AArch64FrameLowering.h

   1 //==-- AArch64FrameLowering.h - TargetFrameLowering for AArch64 --*- C++ -*-==//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 //
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_LIB_TARGET_AARCH64_AARCH64FRAMELOWERING_H
  15 #define LLVM_LIB_TARGET_AARCH64_AARCH64FRAMELOWERING_H
  16
  17 #include "llvm/Target/TargetFrameLowering.h"
  18
  19 namespace llvm {
  20
  21 class AArch64FrameLowering : public TargetFrameLowering {
  22 public:
  23   explicit AArch64FrameLowering()
  24       : TargetFrameLowering(StackGrowsDown, 16, 0, 16,
  25                             true /*StackRealignable*/) {}
  26
  27   void emitCalleeSavedFrameMoves(MachineBasicBlock &MBB,
  28                                  MachineBasicBlock::iterator MBBI,
  29                                  unsigned FramePtr) const;
  30
  31   void eliminateCallFramePseudoInstr(MachineFunction &MF,
  32                                   MachineBasicBlock &MBB,
  33                                   MachineBasicBlock::iterator I) const override;
  34
  35   /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
  36   /// the function.
  37   void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
  38   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
  39
  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,
  44                                  unsigned &FrameReg,
  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;
  50
  51   bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
  52                                   MachineBasicBlock::iterator MI,
  53                                   const std::vector<CalleeSavedInfo> &CSI,
  54                                   const TargetRegisterInfo *TRI) const override;
  55
  56   /// \brief Can this function use the red zone for local allocations.
  57   bool canUseRedZone(const MachineFunction &MF) const;
  58
  59   bool hasFP(const MachineFunction &MF) const override;
  60   bool hasReservedCallFrame(const MachineFunction &MF) const override;
  61
  62   void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
  63                                             RegScavenger *RS) const override;
  64 };
  65
  66 } // namespace llvm
  67
  68 #endif