MipsRegisterInfo.h revision dce4a407a24b04eebc6a376f8e62b41aaa7b071f 
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 override;
47
48  unsigned getRegPressureLimit(const TargetRegisterClass *RC,
49                               MachineFunction &MF) const override;
50  const MCPhysReg *
51  getCalleeSavedRegs(const MachineFunction *MF = nullptr) const override;
52  const uint32_t *getCallPreservedMask(CallingConv::ID) const override;
53  static const uint32_t *getMips16RetHelperMask();
54
55  BitVector getReservedRegs(const MachineFunction &MF) const override;
56
57  bool requiresRegisterScavenging(const MachineFunction &MF) const override;
58
59  bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override;
60
61  /// Stack Frame Processing Methods
62  void eliminateFrameIndex(MachineBasicBlock::iterator II,
63                           int SPAdj, unsigned FIOperandNum,
64                           RegScavenger *RS = nullptr) const override;
65
66  void processFunctionBeforeFrameFinalized(MachineFunction &MF,
67                                       RegScavenger *RS = nullptr) const;
68
69  /// Debug information queries.
70  unsigned getFrameRegister(const MachineFunction &MF) const override;
71
72  /// \brief Return GPR register class.
73  virtual const TargetRegisterClass *intRegClass(unsigned Size) const = 0;
74
75private:
76  virtual void eliminateFI(MachineBasicBlock::iterator II, unsigned OpNo,
77                           int FrameIndex, uint64_t StackSize,
78                           int64_t SPOffset) const = 0;
79};
80
81} // end namespace llvm
82
83#endif
84