MipsRegisterInfo.h revision a88322c283a001019bd5cd4ddeafc425cc4d00af 
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, RegScavenger *RS = NULL) const;
59
60  void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
61
62  /// Debug information queries.
63  unsigned getFrameRegister(const MachineFunction &MF) const;
64
65  /// Exception handling queries.
66  unsigned getEHExceptionRegister() const;
67  unsigned getEHHandlerRegister() const;
68
69private:
70  virtual void eliminateFI(MachineBasicBlock::iterator II, unsigned OpNo,
71                           int FrameIndex, uint64_t StackSize,
72                           int64_t SPOffset) const = 0;
73};
74
75} // end namespace llvm
76
77#endif
78