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 getFrameIndexReference(const MachineFunction &MF, int FI, 41 unsigned &FrameReg) const override; 42 int resolveFrameIndexReference(const MachineFunction &MF, int FI, 43 unsigned &FrameReg, 44 bool PreferFP = false) const; 45 bool spillCalleeSavedRegisters(MachineBasicBlock &MBB, 46 MachineBasicBlock::iterator MI, 47 const std::vector<CalleeSavedInfo> &CSI, 48 const TargetRegisterInfo *TRI) const override; 49 50 bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB, 51 MachineBasicBlock::iterator MI, 52 const std::vector<CalleeSavedInfo> &CSI, 53 const TargetRegisterInfo *TRI) const override; 54 55 /// \brief Can this function use the red zone for local allocations. 56 bool canUseRedZone(const MachineFunction &MF) const; 57 58 bool hasFP(const MachineFunction &MF) const override; 59 bool hasReservedCallFrame(const MachineFunction &MF) const override; 60 61 void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, 62 RegScavenger *RS) const override; 63 64 /// Returns true if the target will correctly handle shrink wrapping. 65 bool enableShrinkWrapping(const MachineFunction &MF) const override { 66 return true; 67 } 68 }; 69 70 } // End llvm namespace 71 72 #endif 73
