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#include "llvm/MC/MCInst.h"
16#include "llvm/MC/MCInstrDesc.h"
17#include "llvm/MC/MCInstrInfo.h"
18
19namespace llvm {
20
21class MCInstrAnalysis {
22protected:
23  friend class Target;
24  const MCInstrInfo *Info;
25
26public:
27  MCInstrAnalysis(const MCInstrInfo *Info) : Info(Info) {}
28
29  virtual ~MCInstrAnalysis() {}
30
31  virtual bool isBranch(const MCInst &Inst) const {
32    return Info->get(Inst.getOpcode()).isBranch();
33  }
34
35  virtual bool isConditionalBranch(const MCInst &Inst) const {
36    return Info->get(Inst.getOpcode()).isConditionalBranch();
37  }
38
39  virtual bool isUnconditionalBranch(const MCInst &Inst) const {
40    return Info->get(Inst.getOpcode()).isUnconditionalBranch();
41  }
42
43  virtual bool isIndirectBranch(const MCInst &Inst) const {
44    return Info->get(Inst.getOpcode()).isIndirectBranch();
45  }
46
47  virtual bool isCall(const MCInst &Inst) const {
48    return Info->get(Inst.getOpcode()).isCall();
49  }
50
51  virtual bool isReturn(const MCInst &Inst) const {
52    return Info->get(Inst.getOpcode()).isReturn();
53  }
54
55  /// evaluateBranch - Given a branch instruction try to get the address the
56  /// branch targets. Otherwise return -1.
57  virtual uint64_t
58  evaluateBranch(const MCInst &Inst, uint64_t Addr, uint64_t Size) const;
59};
60
61}
62