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 /// RS - An instance of the register scavenger.
33 /// FramePtr - ARM physical register used as frame ptr.
37 ARMRegisterInfo(const TargetInstrInfo &tii, const ARMSubtarget &STI);
41 RegScavenger *getRegScavenger() const;
43 /// getRegisterNumbering - Given the enum value for some register, e.g.
44 /// ARM::LR, return the number that it corresponds to (e.g. 14).
45 static unsigned getRegisterNumbering(unsigned RegEnum);
47 /// Code Generation virtual methods...
48 bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
49 MachineBasicBlock::iterator MI,
50 const std::vector<CalleeSavedInfo> &CSI) const;
52 bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
53 MachineBasicBlock::iterator MI,
54 const std::vector<CalleeSavedInfo> &CSI) const;
56 void storeRegToStackSlot(MachineBasicBlock &MBB,
57 MachineBasicBlock::iterator MBBI,
58 unsigned SrcReg, int FrameIndex,
59 const TargetRegisterClass *RC) const;
61 void loadRegFromStackSlot(MachineBasicBlock &MBB,
62 MachineBasicBlock::iterator MBBI,
63 unsigned DestReg, int FrameIndex,
64 const TargetRegisterClass *RC) const;
66 void copyRegToReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
67 unsigned DestReg, unsigned SrcReg,
68 const TargetRegisterClass *RC) const;
70 MachineInstr* foldMemoryOperand(MachineInstr* MI, unsigned OpNum,
71 int FrameIndex) const;
73 const unsigned *getCalleeSavedRegs() const;
75 const TargetRegisterClass* const* getCalleeSavedRegClasses() const;
77 BitVector getReservedRegs(const MachineFunction &MF) const;
79 bool hasFP(const MachineFunction &MF) const;
81 void eliminateCallFramePseudoInstr(MachineFunction &MF,
82 MachineBasicBlock &MBB,
83 MachineBasicBlock::iterator I) const;
85 void eliminateFrameIndex(MachineBasicBlock::iterator II) const;
87 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF) const;
89 void emitPrologue(MachineFunction &MF) const;
90 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
92 // Debug information queries.
93 unsigned getRARegister() const;
94 unsigned getFrameRegister(MachineFunction &MF) const;
96 // Exception handling queries.
97 unsigned getEHExceptionRegister() const;
98 unsigned getEHHandlerRegister() const;
101 } // end namespace llvm