MipsRegisterInfo.h revision ef8c4ca252f1289ca8d0a1e6cfd96ca17fe3c5a8 
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  const TargetRegisterClass *getPointerRegClass(const MachineFunction &MF,
46                                                unsigned Kind) const;
47
48  unsigned getRegPressureLimit(const TargetRegisterClass *RC,
49                               MachineFunction &MF) const;
50  const uint16_t *getCalleeSavedRegs(const MachineFunction *MF = 0) const;
51  const uint32_t *getCallPreservedMask(CallingConv::ID) const;
52  static const uint32_t *getMips16RetHelperMask();
53
54  BitVector getReservedRegs(const MachineFunction &MF) const;
55
56  virtual bool requiresRegisterScavenging(const MachineFunction &MF) const;
57
58  virtual bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const;
59
60  /// Stack Frame Processing Methods
61  void eliminateFrameIndex(MachineBasicBlock::iterator II,
62                           int SPAdj, unsigned FIOperandNum,
63                           RegScavenger *RS = NULL) const;
64
65  void processFunctionBeforeFrameFinalized(MachineFunction &MF,
66                                       RegScavenger *RS = NULL) const;
67
68  /// Debug information queries.
69  unsigned getFrameRegister(const MachineFunction &MF) const;
70
71  /// \brief Return GPR register class.
72  virtual const TargetRegisterClass *intRegClass(unsigned Size) const = 0;
73
74private:
75  virtual void eliminateFI(MachineBasicBlock::iterator II, unsigned OpNo,
76                           int FrameIndex, uint64_t StackSize,
77                           int64_t SPOffset) const = 0;
78};
79
80} // end namespace llvm
81
82#endif
83