| //==-- ARMTargetFrameLowering.h - Define frame lowering for ARM --*- C++ -*-==// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef ARM_FRAMEINFO_H |
| #define ARM_FRAMEINFO_H |
| |
| #include "ARM.h" |
| #include "ARMSubtarget.h" |
| #include "llvm/Target/TargetFrameLowering.h" |
| |
| namespace llvm { |
| class ARMSubtarget; |
| |
| class ARMFrameLowering : public TargetFrameLowering { |
| protected: |
| const ARMSubtarget &STI; |
| |
| public: |
| explicit ARMFrameLowering(const ARMSubtarget &sti) |
| : TargetFrameLowering(StackGrowsDown, sti.getStackAlignment(), 0, 4), |
| STI(sti) { |
| } |
| |
| /// emitProlog/emitEpilog - These methods insert prolog and epilog code into |
| /// the function. |
| void emitPrologue(MachineFunction &MF) const; |
| void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const; |
| |
| bool spillCalleeSavedRegisters(MachineBasicBlock &MBB, |
| MachineBasicBlock::iterator MI, |
| const std::vector<CalleeSavedInfo> &CSI, |
| const TargetRegisterInfo *TRI) const; |
| |
| bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB, |
| MachineBasicBlock::iterator MI, |
| const std::vector<CalleeSavedInfo> &CSI, |
| const TargetRegisterInfo *TRI) const; |
| |
| bool hasFP(const MachineFunction &MF) const; |
| bool hasReservedCallFrame(const MachineFunction &MF) const; |
| bool canSimplifyCallFramePseudos(const MachineFunction &MF) const; |
| int getFrameIndexReference(const MachineFunction &MF, int FI, |
| unsigned &FrameReg) const; |
| int ResolveFrameIndexReference(const MachineFunction &MF, |
| int FI, |
| unsigned &FrameReg, int SPAdj) const; |
| int getFrameIndexOffset(const MachineFunction &MF, int FI) const; |
| |
| void processFunctionBeforeCalleeSavedScan(MachineFunction &MF, |
| RegScavenger *RS) const; |
| |
| private: |
| void emitPushInst(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, |
| const std::vector<CalleeSavedInfo> &CSI, unsigned StmOpc, |
| unsigned StrOpc, bool NoGap, |
| bool(*Func)(unsigned, bool), unsigned NumAlignedDPRCS2Regs, |
| unsigned MIFlags = 0) const; |
| void emitPopInst(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, |
| const std::vector<CalleeSavedInfo> &CSI, unsigned LdmOpc, |
| unsigned LdrOpc, bool isVarArg, bool NoGap, |
| bool(*Func)(unsigned, bool), |
| unsigned NumAlignedDPRCS2Regs) const; |
| |
| virtual void eliminateCallFramePseudoInstr( |
| MachineFunction &MF, |
| MachineBasicBlock &MBB, |
| MachineBasicBlock::iterator MI) const; |
| }; |
| |
| } // End llvm namespace |
| |
| #endif |
