MCInstrAnalysis.h revision 41ab14b725c8f2bb3e54553d0d7d96ff184786b1 
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
26  MCInstrAnalysis(const MCInstrInfo *Info) : Info(Info) {}
27public:
28  virtual bool isBranch(const MCInst &Inst) const {
29    return Info->get(Inst.getOpcode()).isBranch();
30  }
31
32  virtual bool isConditionalBranch(const MCInst &Inst) const {
33    return Info->get(Inst.getOpcode()).isBranch();
34  }
35
36  virtual bool isUnconditionalBranch(const MCInst &Inst) const {
37    return Info->get(Inst.getOpcode()).isUnconditionalBranch();
38  }
39
40  virtual bool isIndirectBranch(const MCInst &Inst) const {
41    return Info->get(Inst.getOpcode()).isIndirectBranch();
42  }
43
44  virtual bool isReturn(const MCInst &Inst) const {
45    return Info->get(Inst.getOpcode()).isReturn();
46  }
47
48  /// evaluateBranch - Given a branch instruction try to get the address the
49  /// branch targets. Otherwise return -1.
50  virtual uint64_t
51  evaluateBranch(const MCInst &Inst, uint64_t Addr, uint64_t Size) const;
52};
53
54}
55