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 /// getRegisterNumbering - Given the enum value for some register, e.g.
42 /// ARM::LR, return the number that it corresponds to (e.g. 14).
43 static unsigned getRegisterNumbering(unsigned RegEnum);
45 /// Code Generation virtual methods...
46 bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
47 MachineBasicBlock::iterator MI,
48 const std::vector<CalleeSavedInfo> &CSI) const;
50 bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
51 MachineBasicBlock::iterator MI,
52 const std::vector<CalleeSavedInfo> &CSI) const;
54 void storeRegToStackSlot(MachineBasicBlock &MBB,
55 MachineBasicBlock::iterator MBBI,
56 unsigned SrcReg, int FrameIndex,
57 const TargetRegisterClass *RC) const;
59 void loadRegFromStackSlot(MachineBasicBlock &MBB,
60 MachineBasicBlock::iterator MBBI,
61 unsigned DestReg, int FrameIndex,
62 const TargetRegisterClass *RC) const;
64 void copyRegToReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
65 unsigned DestReg, unsigned SrcReg,
66 const TargetRegisterClass *RC) const;
68 MachineInstr* foldMemoryOperand(MachineInstr* MI, unsigned OpNum,
69 int FrameIndex) const;
71 const unsigned *getCalleeSavedRegs() const;
73 const TargetRegisterClass* const* getCalleeSavedRegClasses() const;
75 BitVector getReservedRegs(const MachineFunction &MF) const;
77 bool requiresRegisterScavenging(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,
86 RegScavenger *RS = NULL) const;
88 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF) const;
90 void emitPrologue(MachineFunction &MF) const;
91 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
93 // Debug information queries.
94 unsigned getRARegister() const;
95 unsigned getFrameRegister(MachineFunction &MF) const;
97 // Exception handling queries.
98 unsigned getEHExceptionRegister() const;
99 unsigned getEHHandlerRegister() const;
102 } // end namespace llvm