SparcInstrInfo.h revision 600f171486708734e2b9c9c617528cfc51c16850 
1//===- SparcInstrInfo.h - Sparc 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 Sparc implementation of the TargetInstrInfo class.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef SPARCINSTRUCTIONINFO_H
15#define SPARCINSTRUCTIONINFO_H
16
17#include "llvm/Target/TargetInstrInfo.h"
18#include "SparcRegisterInfo.h"
19
20namespace llvm {
21
22/// SPII - This namespace holds all of the target specific flags that
23/// instruction info tracks.
24///
25namespace SPII {
26  enum {
27    Pseudo = (1<<0),
28    Load = (1<<1),
29    Store = (1<<2),
30    DelaySlot = (1<<3)
31  };
32}
33
34class SparcInstrInfo : public TargetInstrInfoImpl {
35  const SparcRegisterInfo RI;
36  const SparcSubtarget& Subtarget;
37public:
38  explicit SparcInstrInfo(SparcSubtarget &ST);
39
40  /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info.  As
41  /// such, whenever a client has an instance of instruction info, it should
42  /// always be able to get register info as well (through this method).
43  ///
44  virtual const SparcRegisterInfo &getRegisterInfo() const { return RI; }
45
46  /// Return true if the instruction is a register to register move and return
47  /// the source and dest operands and their sub-register indices by reference.
48  virtual bool isMoveInstr(const MachineInstr &MI,
49                           unsigned &SrcReg, unsigned &DstReg,
50                           unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
51
52  /// isLoadFromStackSlot - If the specified machine instruction is a direct
53  /// load from a stack slot, return the virtual or physical register number of
54  /// the destination along with the FrameIndex of the loaded stack slot.  If
55  /// not, return 0.  This predicate must return 0 if the instruction has
56  /// any side effects other than loading from the stack slot.
57  virtual unsigned isLoadFromStackSlot(const MachineInstr *MI,
58                                       int &FrameIndex) const;
59
60  /// isStoreToStackSlot - If the specified machine instruction is a direct
61  /// store to a stack slot, return the virtual or physical register number of
62  /// the source reg along with the FrameIndex of the loaded stack slot.  If
63  /// not, return 0.  This predicate must return 0 if the instruction has
64  /// any side effects other than storing to the stack slot.
65  virtual unsigned isStoreToStackSlot(const MachineInstr *MI,
66                                      int &FrameIndex) const;
67
68
69  virtual unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
70                                MachineBasicBlock *FBB,
71                                const SmallVectorImpl<MachineOperand> &Cond,
72                                DebugLoc DL) const;
73
74  virtual void copyPhysReg(MachineBasicBlock &MBB,
75                           MachineBasicBlock::iterator I, DebugLoc DL,
76                           unsigned DestReg, unsigned SrcReg,
77                           bool KillSrc) const;
78
79  virtual void storeRegToStackSlot(MachineBasicBlock &MBB,
80                                   MachineBasicBlock::iterator MBBI,
81                                   unsigned SrcReg, bool isKill, int FrameIndex,
82                                   const TargetRegisterClass *RC,
83                                   const TargetRegisterInfo *TRI) const;
84
85  virtual void loadRegFromStackSlot(MachineBasicBlock &MBB,
86                                    MachineBasicBlock::iterator MBBI,
87                                    unsigned DestReg, int FrameIndex,
88                                    const TargetRegisterClass *RC,
89                                    const TargetRegisterInfo *TRI) const;
90
91  unsigned getGlobalBaseReg(MachineFunction *MF) const;
92};
93
94}
95
96#endif
97