MipsRegisterInfo.h revision 288943 
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 LLVM_LIB_TARGET_MIPS_MIPSREGISTERINFO_H
15#define LLVM_LIB_TARGET_MIPS_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 MipsRegisterInfo : public MipsGenRegisterInfo {
25public:
26  MipsRegisterInfo();
27
28  /// getRegisterNumbering - Given the enum value for some register, e.g.
29  /// Mips::RA, return the number that it corresponds to (e.g. 31).
30  static unsigned getRegisterNumbering(unsigned RegEnum);
31
32  /// Get PIC indirect call register
33  static unsigned getPICCallReg();
34
35  /// Adjust the Mips stack frame.
36  void adjustMipsStackFrame(MachineFunction &MF) const;
37
38  /// Code Generation virtual methods...
39  const TargetRegisterClass *getPointerRegClass(const MachineFunction &MF,
40                                                unsigned Kind) const override;
41
42  unsigned getRegPressureLimit(const TargetRegisterClass *RC,
43                               MachineFunction &MF) const override;
44  const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF) const override;
45  const uint32_t *getCallPreservedMask(const MachineFunction &MF,
46                                       CallingConv::ID) const override;
47  static const uint32_t *getMips16RetHelperMask();
48
49  BitVector getReservedRegs(const MachineFunction &MF) const override;
50
51  bool requiresRegisterScavenging(const MachineFunction &MF) const override;
52
53  bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override;
54
55  /// Stack Frame Processing Methods
56  void eliminateFrameIndex(MachineBasicBlock::iterator II,
57                           int SPAdj, unsigned FIOperandNum,
58                           RegScavenger *RS = nullptr) const override;
59
60  void processFunctionBeforeFrameFinalized(MachineFunction &MF,
61                                       RegScavenger *RS = nullptr) const;
62
63  // Stack realignment queries.
64  bool canRealignStack(const MachineFunction &MF) const;
65
66  bool needsStackRealignment(const MachineFunction &MF) const override;
67
68  /// Debug information queries.
69  unsigned getFrameRegister(const MachineFunction &MF) const override;
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