SystemZRegisterInfo.h revision 6f07bd6ae8c2b11e78f351d7751d1e9b32f38a75 
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  bool hasReservedCallFrame(MachineFunction &MF) const { return true; }
38  bool hasFP(const MachineFunction &MF) const;
39
40  int getFrameIndexOffset(const MachineFunction &MF, int FI) const;
41
42  void eliminateCallFramePseudoInstr(MachineFunction &MF,
43                                     MachineBasicBlock &MBB,
44                                     MachineBasicBlock::iterator I) const;
45
46  unsigned eliminateFrameIndex(MachineBasicBlock::iterator II,
47                               int SPAdj, FrameIndexValue *Value = NULL,
48                               RegScavenger *RS = NULL) const;
49
50
51  void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
52                                            RegScavenger *RS) const;
53
54  void emitPrologue(MachineFunction &MF) const;
55  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
56
57  // Debug information queries.
58  unsigned getRARegister() const;
59  unsigned getFrameRegister(const MachineFunction &MF) const;
60
61  // Exception handling queries.
62  unsigned getEHExceptionRegister() const;
63  unsigned getEHHandlerRegister() const;
64
65  int getDwarfRegNum(unsigned RegNum, bool isEH) const;
66};
67
68} // end namespace llvm
69
70#endif
71