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//===- ARMRegisterInfo.h - ARM Register Information Impl --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the "Instituto Nokia de Tecnologia" and
// is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the ARM implementation of the MRegisterInfo class.
//
//===----------------------------------------------------------------------===//
#ifndef ARMREGISTERINFO_H
#define ARMREGISTERINFO_H
#include "llvm/Target/MRegisterInfo.h"
#include "ARMGenRegisterInfo.h.inc"
namespace llvm {
class ARMSubtarget;
class TargetInstrInfo;
class Type;
struct ARMRegisterInfo : public ARMGenRegisterInfo {
const TargetInstrInfo &TII;
const ARMSubtarget &STI;
private:
/// FramePtr - ARM physical register used as frame ptr.
unsigned FramePtr;
public:
ARMRegisterInfo(const TargetInstrInfo &tii, const ARMSubtarget &STI);
/// getRegisterNumbering - Given the enum value for some register, e.g.
/// ARM::LR, return the number that it corresponds to (e.g. 14).
static unsigned getRegisterNumbering(unsigned RegEnum);
/// Code Generation virtual methods...
bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
const std::vector<CalleeSavedInfo> &CSI) const;
bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
const std::vector<CalleeSavedInfo> &CSI) const;
void storeRegToStackSlot(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MBBI,
unsigned SrcReg, int FrameIndex,
const TargetRegisterClass *RC) const;
void loadRegFromStackSlot(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MBBI,
unsigned DestReg, int FrameIndex,
const TargetRegisterClass *RC) const;
void copyRegToReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
unsigned DestReg, unsigned SrcReg,
const TargetRegisterClass *RC) const;
void reMaterialize(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
unsigned DestReg, const MachineInstr *Orig) const;
MachineInstr* foldMemoryOperand(MachineInstr* MI, unsigned OpNum,
int FrameIndex) const;
const unsigned *getCalleeSavedRegs(const MachineFunction *MF = 0) const;
const TargetRegisterClass* const*
getCalleeSavedRegClasses(const MachineFunction *MF = 0) const;
BitVector getReservedRegs(const MachineFunction &MF) const;
bool isReservedReg(const MachineFunction &MF, unsigned Reg) const;
bool requiresRegisterScavenging(const MachineFunction &MF) const;
bool hasFP(const MachineFunction &MF) const;
bool hasReservedCallFrame(MachineFunction &MF) const;
void eliminateCallFramePseudoInstr(MachineFunction &MF,
MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const;
void eliminateFrameIndex(MachineBasicBlock::iterator II,
int SPAdj, RegScavenger *RS = NULL) const;
void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
RegScavenger *RS = NULL) const;
void emitPrologue(MachineFunction &MF) const;
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
// Debug information queries.
unsigned getRARegister() const;
unsigned getFrameRegister(MachineFunction &MF) const;
// Exception handling queries.
unsigned getEHExceptionRegister() const;
unsigned getEHHandlerRegister() const;
};
} // end namespace llvm
#endif
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