MCInstrAnalysis.h revision 36b56886974eae4f9c5ebc96befd3e7bfe5de338 
1//===-- llvm/MC/MCInstrAnalysis.h - InstrDesc target hooks ------*- 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 defines the MCInstrAnalysis class which the MCTargetDescs can
11// derive from to give additional information to MC.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_MC_MCINSTRANALYSIS_H
16#define LLVM_MC_MCINSTRANALYSIS_H
17
18#include "llvm/MC/MCInst.h"
19#include "llvm/MC/MCInstrDesc.h"
20#include "llvm/MC/MCInstrInfo.h"
21
22namespace llvm {
23
24class MCInstrAnalysis {
25protected:
26  friend class Target;
27  const MCInstrInfo *Info;
28
29public:
30  MCInstrAnalysis(const MCInstrInfo *Info) : Info(Info) {}
31
32  virtual ~MCInstrAnalysis() {}
33
34  virtual bool isBranch(const MCInst &Inst) const {
35    return Info->get(Inst.getOpcode()).isBranch();
36  }
37
38  virtual bool isConditionalBranch(const MCInst &Inst) const {
39    return Info->get(Inst.getOpcode()).isConditionalBranch();
40  }
41
42  virtual bool isUnconditionalBranch(const MCInst &Inst) const {
43    return Info->get(Inst.getOpcode()).isUnconditionalBranch();
44  }
45
46  virtual bool isIndirectBranch(const MCInst &Inst) const {
47    return Info->get(Inst.getOpcode()).isIndirectBranch();
48  }
49
50  virtual bool isCall(const MCInst &Inst) const {
51    return Info->get(Inst.getOpcode()).isCall();
52  }
53
54  virtual bool isReturn(const MCInst &Inst) const {
55    return Info->get(Inst.getOpcode()).isReturn();
56  }
57
58  virtual bool isTerminator(const MCInst &Inst) const {
59    return Info->get(Inst.getOpcode()).isTerminator();
60  }
61
62  /// evaluateBranch - Given a branch instruction try to get the address the
63  /// branch targets. Return true on success, and the address in Target.
64  virtual bool
65  evaluateBranch(const MCInst &Inst, uint64_t Addr, uint64_t Size,
66                 uint64_t &Target) const;
67};
68
69} // End llvm namespace
70
71#endif
72