MipsRegisterInfo.h revision 3080d23fde4981835d8a7faf46c152441fadb11f 
1//===-- MipsRegisterInfo.h - Mips 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 Mips implementation of the TargetRegisterInfo class.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef MIPSREGISTERINFO_H
15#define MIPSREGISTERINFO_H
16
17#include "Mips.h"
18#include "llvm/Target/TargetRegisterInfo.h"
19
20#define GET_REGINFO_HEADER
21#include "MipsGenRegisterInfo.inc"
22
23namespace llvm {
24class MipsSubtarget;
25class Type;
26
27class MipsRegisterInfo : public MipsGenRegisterInfo {
28protected:
29  const MipsSubtarget &Subtarget;
30
31public:
32  MipsRegisterInfo(const MipsSubtarget &Subtarget);
33
34  /// getRegisterNumbering - Given the enum value for some register, e.g.
35  /// Mips::RA, return the number that it corresponds to (e.g. 31).
36  static unsigned getRegisterNumbering(unsigned RegEnum);
37
38  /// Get PIC indirect call register
39  static unsigned getPICCallReg();
40
41  /// Adjust the Mips stack frame.
42  void adjustMipsStackFrame(MachineFunction &MF) const;
43
44  /// Code Generation virtual methods...
45  unsigned getRegPressureLimit(const TargetRegisterClass *RC,
46                               MachineFunction &MF) const;
47  const uint16_t *getCalleeSavedRegs(const MachineFunction *MF = 0) const;
48  const uint32_t *getCallPreservedMask(CallingConv::ID) const;
49
50  BitVector getReservedRegs(const MachineFunction &MF) const;
51
52  virtual bool requiresRegisterScavenging(const MachineFunction &MF) const;
53
54  virtual bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const;
55
56  /// Stack Frame Processing Methods
57  void eliminateFrameIndex(MachineBasicBlock::iterator II,
58                           int SPAdj, unsigned FIOperandNum,
59                           RegScavenger *RS = NULL) const;
60
61  void processFunctionBeforeFrameFinalized(MachineFunction &MF,
62                                       RegScavenger *RS = NULL) const;
63
64  /// Debug information queries.
65  unsigned getFrameRegister(const MachineFunction &MF) const;
66
67  /// Exception handling queries.
68  unsigned getEHExceptionRegister() const;
69  unsigned getEHHandlerRegister() const;
70
71private:
72  virtual void eliminateFI(MachineBasicBlock::iterator II, unsigned OpNo,
73                           int FrameIndex, uint64_t StackSize,
74                           int64_t SPOffset) const = 0;
75};
76
77} // end namespace llvm
78
79#endif
80