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//===- SystemZRegisterInfo.h - SystemZ Register Information Impl ----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the SystemZ implementation of the TargetRegisterInfo class.
//
//===----------------------------------------------------------------------===//
#ifndef SystemZREGISTERINFO_H
#define SystemZREGISTERINFO_H
#include "llvm/Target/TargetRegisterInfo.h"
#include "SystemZGenRegisterInfo.h.inc"
namespace llvm {
namespace SystemZ {
/// SubregIndex - The index of various sized subregister classes. Note that
/// these indices must be kept in sync with the class indices in the
/// SystemZRegisterInfo.td file.
enum SubregIndex {
SUBREG_32BIT = 1, SUBREG_EVEN = 1, SUBREG_ODD = 2
};
}
class SystemZSubtarget;
class SystemZInstrInfo;
class Type;
struct SystemZRegisterInfo : public SystemZGenRegisterInfo {
SystemZTargetMachine &TM;
const SystemZInstrInfo &TII;
SystemZRegisterInfo(SystemZTargetMachine &tm, const SystemZInstrInfo &tii);
/// Code Generation virtual methods...
const unsigned *getCalleeSavedRegs(const MachineFunction *MF = 0) const;
const TargetRegisterClass* const* getCalleeSavedRegClasses(
const MachineFunction *MF = 0) const;
BitVector getReservedRegs(const MachineFunction &MF) const;
bool hasReservedCallFrame(MachineFunction &MF) const { return true; }
bool hasFP(const MachineFunction &MF) const;
int getFrameIndexOffset(MachineFunction &MF, int FI) const;
void eliminateCallFramePseudoInstr(MachineFunction &MF,
MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const;
unsigned eliminateFrameIndex(MachineBasicBlock::iterator II,
int SPAdj, int *Value = NULL,
RegScavenger *RS = NULL) const;
void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
RegScavenger *RS) const;
void emitPrologue(MachineFunction &MF) const;
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
// Debug information queries.
unsigned getRARegister() const;
unsigned getFrameRegister(const MachineFunction &MF) const;
// Exception handling queries.
unsigned getEHExceptionRegister() const;
unsigned getEHHandlerRegister() const;
int getDwarfRegNum(unsigned RegNum, bool isEH) const;
};
} // end namespace llvm
#endif
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