SparcInstrInfo.h revision e785e531f4495068ee46cabd926939eec15a565a 
1//===- SparcV8InstrInfo.h - SparcV8 Instruction Information -----*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file was developed by the LLVM research group and is distributed under
6// the University of Illinois Open Source License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file contains the SparcV8 implementation of the TargetInstrInfo class.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef SPARCV8INSTRUCTIONINFO_H
15#define SPARCV8INSTRUCTIONINFO_H
16
17#include "llvm/Target/TargetInstrInfo.h"
18#include "SparcV8RegisterInfo.h"
19
20namespace llvm {
21
22class SparcV8InstrInfo : public TargetInstrInfo {
23  const SparcV8RegisterInfo RI;
24public:
25  SparcV8InstrInfo();
26
27  /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info.  As
28  /// such, whenever a client has an instance of instruction info, it should
29  /// always be able to get register info as well (through this method).
30  ///
31  virtual const MRegisterInfo &getRegisterInfo() const { return RI; }
32
33  /// createNOPinstr - returns the target's implementation of NOP, which is
34  /// usually a pseudo-instruction, implemented by a degenerate version of
35  /// another instruction.
36  ///
37  MachineInstr* createNOPinstr() const;
38
39  /// isNOPinstr - not having a special NOP opcode, we need to know if a given
40  /// instruction is interpreted as an `official' NOP instr, i.e., there may be
41  /// more than one way to `do nothing' but only one canonical way to slack off.
42  ///
43  bool isNOPinstr(const MachineInstr &MI) const;
44};
45
46}
47
48#endif
49