SystemZRegisterInfo.h revision d0c38176690e9602a93a20a43f1bd084564a8116 
1//===-- SystemZRegisterInfo.h - SystemZ Register Information ----*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file contains the SystemZ implementation of the TargetRegisterInfo class.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef SystemZREGISTERINFO_H
15#define SystemZREGISTERINFO_H
16
17#include "llvm/Target/TargetRegisterInfo.h"
18#include "SystemZGenRegisterInfo.h.inc"
19
20namespace llvm {
21
22class SystemZSubtarget;
23class SystemZInstrInfo;
24class Type;
25
26struct SystemZRegisterInfo : public SystemZGenRegisterInfo {
27  SystemZTargetMachine &TM;
28  const SystemZInstrInfo &TII;
29
30  SystemZRegisterInfo(SystemZTargetMachine &tm, const SystemZInstrInfo &tii);
31
32  /// Code Generation virtual methods...
33  const unsigned *getCalleeSavedRegs(const MachineFunction *MF = 0) const;
34
35  BitVector getReservedRegs(const MachineFunction &MF) const;
36
37  int getFrameIndexOffset(const MachineFunction &MF, int FI) const;
38
39  void eliminateCallFramePseudoInstr(MachineFunction &MF,
40                                     MachineBasicBlock &MBB,
41                                     MachineBasicBlock::iterator I) const;
42
43  void eliminateFrameIndex(MachineBasicBlock::iterator II,
44                           int SPAdj, RegScavenger *RS = NULL) const;
45
46
47  void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
48                                            RegScavenger *RS) const;
49
50  // Debug information queries.
51  unsigned getRARegister() const;
52  unsigned getFrameRegister(const MachineFunction &MF) const;
53
54  // Exception handling queries.
55  unsigned getEHExceptionRegister() const;
56  unsigned getEHHandlerRegister() const;
57
58  int getDwarfRegNum(unsigned RegNum, bool isEH) const;
59};
60
61} // end namespace llvm
62
63#endif
64