1//===-- MipsInstrInfo.h - Mips Instruction Information ----------*- 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 TargetInstrInfo class.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef MIPSINSTRUCTIONINFO_H
15#define MIPSINSTRUCTIONINFO_H
16
17#include "Mips.h"
18#include "MipsAnalyzeImmediate.h"
19#include "MipsRegisterInfo.h"
20#include "llvm/Support/ErrorHandling.h"
21#include "llvm/Target/TargetInstrInfo.h"
22
23#define GET_INSTRINFO_HEADER
24#include "MipsGenInstrInfo.inc"
25
26namespace llvm {
27
28class MipsInstrInfo : public MipsGenInstrInfo {
29protected:
30  MipsTargetMachine &TM;
31  unsigned UncondBrOpc;
32
33public:
34  explicit MipsInstrInfo(MipsTargetMachine &TM, unsigned UncondBrOpc);
35
36  static const MipsInstrInfo *create(MipsTargetMachine &TM);
37
38  /// Branch Analysis
39  virtual bool AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
40                             MachineBasicBlock *&FBB,
41                             SmallVectorImpl<MachineOperand> &Cond,
42                             bool AllowModify) const;
43
44  virtual unsigned RemoveBranch(MachineBasicBlock &MBB) const;
45
46  virtual unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
47                                MachineBasicBlock *FBB,
48                                const SmallVectorImpl<MachineOperand> &Cond,
49                                DebugLoc DL) const;
50
51  virtual
52  bool ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const;
53
54  virtual MachineInstr* emitFrameIndexDebugValue(MachineFunction &MF,
55                                                 int FrameIx, uint64_t Offset,
56                                                 const MDNode *MDPtr,
57                                                 DebugLoc DL) const;
58
59  /// Insert nop instruction when hazard condition is found
60  virtual void insertNoop(MachineBasicBlock &MBB,
61                          MachineBasicBlock::iterator MI) const;
62
63  /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info.  As
64  /// such, whenever a client has an instance of instruction info, it should
65  /// always be able to get register info as well (through this method).
66  ///
67  virtual const MipsRegisterInfo &getRegisterInfo() const = 0;
68
69  virtual unsigned GetOppositeBranchOpc(unsigned Opc) const = 0;
70
71  /// Return the number of bytes of code the specified instruction may be.
72  unsigned GetInstSizeInBytes(const MachineInstr *MI) const;
73
74protected:
75  bool isZeroImm(const MachineOperand &op) const;
76
77  MachineMemOperand *GetMemOperand(MachineBasicBlock &MBB, int FI,
78                                   unsigned Flag) const;
79
80private:
81  virtual unsigned GetAnalyzableBrOpc(unsigned Opc) const = 0;
82
83  void AnalyzeCondBr(const MachineInstr *Inst, unsigned Opc,
84                     MachineBasicBlock *&BB,
85                     SmallVectorImpl<MachineOperand> &Cond) const;
86
87  void BuildCondBr(MachineBasicBlock &MBB, MachineBasicBlock *TBB, DebugLoc DL,
88                   const SmallVectorImpl<MachineOperand>& Cond) const;
89};
90
91/// Create MipsInstrInfo objects.
92const MipsInstrInfo *createMips16InstrInfo(MipsTargetMachine &TM);
93const MipsInstrInfo *createMipsSEInstrInfo(MipsTargetMachine &TM);
94
95}
96
97#endif
98