1 //==-- ARMTargetFrameLowering.h - Define frame lowering for ARM --*- 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 LLVM_LIB_TARGET_ARM_ARMFRAMELOWERING_H
15 #define LLVM_LIB_TARGET_ARM_ARMFRAMELOWERING_H
17 #include "llvm/Target/TargetFrameLowering.h"
22 class ARMFrameLowering : public TargetFrameLowering {
24 const ARMSubtarget &STI;
27 explicit ARMFrameLowering(const ARMSubtarget &sti);
29 /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
31 void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
32 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
34 void fixTCReturn(MachineFunction &MF, MachineBasicBlock &MBB) const;
36 bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
37 MachineBasicBlock::iterator MI,
38 const std::vector<CalleeSavedInfo> &CSI,
39 const TargetRegisterInfo *TRI) const override;
41 bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
42 MachineBasicBlock::iterator MI,
43 const std::vector<CalleeSavedInfo> &CSI,
44 const TargetRegisterInfo *TRI) const override;
46 bool noFramePointerElim(const MachineFunction &MF) const override;
48 bool hasFP(const MachineFunction &MF) const override;
49 bool hasReservedCallFrame(const MachineFunction &MF) const override;
50 bool canSimplifyCallFramePseudos(const MachineFunction &MF) const override;
51 int getFrameIndexReference(const MachineFunction &MF, int FI,
52 unsigned &FrameReg) const override;
53 int ResolveFrameIndexReference(const MachineFunction &MF, int FI,
54 unsigned &FrameReg, int SPAdj) const;
55 int getFrameIndexOffset(const MachineFunction &MF, int FI) const override;
57 void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
58 RegScavenger *RS) const override;
60 void adjustForSegmentedStacks(MachineFunction &MF,
61 MachineBasicBlock &MBB) const override;
64 void emitPushInst(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
65 const std::vector<CalleeSavedInfo> &CSI, unsigned StmOpc,
66 unsigned StrOpc, bool NoGap,
67 bool(*Func)(unsigned, bool), unsigned NumAlignedDPRCS2Regs,
68 unsigned MIFlags = 0) const;
69 void emitPopInst(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
70 const std::vector<CalleeSavedInfo> &CSI, unsigned LdmOpc,
71 unsigned LdrOpc, bool isVarArg, bool NoGap,
72 bool(*Func)(unsigned, bool),
73 unsigned NumAlignedDPRCS2Regs) const;
76 eliminateCallFramePseudoInstr(MachineFunction &MF,
77 MachineBasicBlock &MBB,
78 MachineBasicBlock::iterator MI) const override;
81 } // End llvm namespace