1 //===- ARMRegisterInfo.h - ARM Register Information Impl --------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the "Instituto Nokia de Tecnologia" and
6 // is distributed under the University of Illinois Open Source
7 // License. See LICENSE.TXT for details.
9 //===----------------------------------------------------------------------===//
11 // This file contains the ARM implementation of the MRegisterInfo class.
13 //===----------------------------------------------------------------------===//
15 #ifndef ARMREGISTERINFO_H
16 #define ARMREGISTERINFO_H
18 #include "llvm/Target/MRegisterInfo.h"
19 #include "ARMGenRegisterInfo.h.inc"
23 class TargetInstrInfo;
26 struct ARMRegisterInfo : public ARMGenRegisterInfo {
27 const TargetInstrInfo &TII;
28 const ARMSubtarget &STI;
30 /// FramePtr - ARM physical register used as frame ptr.
34 ARMRegisterInfo(const TargetInstrInfo &tii, const ARMSubtarget &STI);
36 /// getRegisterNumbering - Given the enum value for some register, e.g.
37 /// ARM::LR, return the number that it corresponds to (e.g. 14).
38 static unsigned getRegisterNumbering(unsigned RegEnum);
40 /// Code Generation virtual methods...
41 bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
42 MachineBasicBlock::iterator MI,
43 const std::vector<CalleeSavedInfo> &CSI) const;
45 bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
46 MachineBasicBlock::iterator MI,
47 const std::vector<CalleeSavedInfo> &CSI) const;
49 void storeRegToStackSlot(MachineBasicBlock &MBB,
50 MachineBasicBlock::iterator MBBI,
51 unsigned SrcReg, int FrameIndex,
52 const TargetRegisterClass *RC) const;
54 void loadRegFromStackSlot(MachineBasicBlock &MBB,
55 MachineBasicBlock::iterator MBBI,
56 unsigned DestReg, int FrameIndex,
57 const TargetRegisterClass *RC) const;
59 void copyRegToReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
60 unsigned DestReg, unsigned SrcReg,
61 const TargetRegisterClass *RC) const;
63 void reMaterialize(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
64 unsigned DestReg, const MachineInstr *Orig) const;
66 MachineInstr* foldMemoryOperand(MachineInstr* MI, unsigned OpNum,
67 int FrameIndex) const;
69 const unsigned *getCalleeSavedRegs(const MachineFunction *MF = 0) const;
71 const TargetRegisterClass* const*
72 getCalleeSavedRegClasses(const MachineFunction *MF = 0) const;
74 BitVector getReservedRegs(const MachineFunction &MF) const;
76 bool isReservedReg(const MachineFunction &MF, unsigned Reg) const;
78 bool requiresRegisterScavenging(const MachineFunction &MF) const;
80 bool hasFP(const MachineFunction &MF) const;
82 bool hasReservedCallFrame(MachineFunction &MF) const;
84 void eliminateCallFramePseudoInstr(MachineFunction &MF,
85 MachineBasicBlock &MBB,
86 MachineBasicBlock::iterator I) const;
88 void eliminateFrameIndex(MachineBasicBlock::iterator II,
89 int SPAdj, RegScavenger *RS = NULL) const;
91 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
92 RegScavenger *RS = NULL) const;
94 void emitPrologue(MachineFunction &MF) const;
95 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
97 // Debug information queries.
98 unsigned getRARegister() const;
99 unsigned getFrameRegister(MachineFunction &MF) const;
101 // Exception handling queries.
102 unsigned getEHExceptionRegister() const;
103 unsigned getEHHandlerRegister() const;
106 } // end namespace llvm