| Tim Northover | 3b0846e | 2014-05-24 12:50:23 +0000 | [diff] [blame] | 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 AArch64_FRAMELOWERING_H |
| 15 | #define AArch64_FRAMELOWERING_H |
| 16 | |
| 17 | #include "llvm/Target/TargetFrameLowering.h" |
| 18 | |
| 19 | namespace llvm { |
| 20 | |
| 21 | class AArch64Subtarget; |
| 22 | class AArch64TargetMachine; |
| 23 | |
| 24 | class AArch64FrameLowering : public TargetFrameLowering { |
| 25 | const AArch64TargetMachine &TM; |
| 26 | |
| 27 | public: |
| 28 | explicit AArch64FrameLowering(const AArch64TargetMachine &TM, |
| 29 | const AArch64Subtarget &STI) |
| 30 | : TargetFrameLowering(StackGrowsDown, 16, 0, 16, |
| 31 | false /*StackRealignable*/), |
| 32 | TM(TM) {} |
| 33 | |
| 34 | void emitCalleeSavedFrameMoves(MachineBasicBlock &MBB, |
| 35 | MachineBasicBlock::iterator MBBI, |
| 36 | unsigned FramePtr) const; |
| 37 | |
| 38 | void eliminateCallFramePseudoInstr(MachineFunction &MF, |
| 39 | MachineBasicBlock &MBB, |
| 40 | MachineBasicBlock::iterator I) const override; |
| 41 | |
| 42 | /// emitProlog/emitEpilog - These methods insert prolog and epilog code into |
| 43 | /// the function. |
| 44 | void emitPrologue(MachineFunction &MF) const override; |
| 45 | void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override; |
| 46 | |
| 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, |
| 51 | unsigned &FrameReg, |
| 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; |
| 57 | |
| 58 | bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB, |
| 59 | MachineBasicBlock::iterator MI, |
| 60 | const std::vector<CalleeSavedInfo> &CSI, |
| 61 | const TargetRegisterInfo *TRI) const override; |
| 62 | |
| 63 | /// \brief Can this function use the red zone for local allocations. |
| 64 | bool canUseRedZone(const MachineFunction &MF) const; |
| 65 | |
| 66 | bool hasFP(const MachineFunction &MF) const override; |
| 67 | bool hasReservedCallFrame(const MachineFunction &MF) const override; |
| 68 | |
| 69 | void processFunctionBeforeCalleeSavedScan(MachineFunction &MF, |
| 70 | RegScavenger *RS) const override; |
| 71 | }; |
| 72 | |
| 73 | } // End llvm namespace |
| 74 | |
| 75 | #endif |