SystemZRegisterInfo.h revision ef5decab535f0f45cff45abf156294d3be495660 
1//===- SystemZRegisterInfo.h - SystemZ Register Information Impl ----*- 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 TargetInstrInfo;
24class Type;
25
26struct SystemZRegisterInfo : public SystemZGenRegisterInfo {
27  SystemZTargetMachine &TM;
28  const TargetInstrInfo &TII;
29
30  SystemZRegisterInfo(SystemZTargetMachine &tm, const TargetInstrInfo &tii);
31
32  /// Code Generation virtual methods...
33  const unsigned *getCalleeSavedRegs(const MachineFunction *MF = 0) const;
34
35  const TargetRegisterClass* const* getCalleeSavedRegClasses(
36                                     const MachineFunction *MF = 0) const;
37
38  BitVector getReservedRegs(const MachineFunction &MF) const;
39
40  bool hasReservedCallFrame(MachineFunction &MF) const;
41  bool hasFP(const MachineFunction &MF) const;
42
43  int getFrameIndexOffset(MachineFunction &MF, int FI) const;
44
45  void eliminateCallFramePseudoInstr(MachineFunction &MF,
46                                     MachineBasicBlock &MBB,
47                                     MachineBasicBlock::iterator I) const;
48
49  void eliminateFrameIndex(MachineBasicBlock::iterator II,
50                           int SPAdj, RegScavenger *RS = NULL) const;
51
52
53  void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
54                                            RegScavenger *RS) const;
55
56  void emitPrologue(MachineFunction &MF) const;
57  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
58
59  // Debug information queries.
60  unsigned getRARegister() const;
61  unsigned getFrameRegister(MachineFunction &MF) const;
62
63  // Exception handling queries.
64  unsigned getEHExceptionRegister() const;
65  unsigned getEHHandlerRegister() const;
66
67  int getDwarfRegNum(unsigned RegNum, bool isEH) const;
68};
69
70} // end namespace llvm
71
72#endif
73