LLVM  6.0.0svn
MCInstrAnalysis.h
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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 #include <cstdint>
22 
23 namespace llvm {
24 
26 protected:
27  friend class Target;
28 
29  const MCInstrInfo *Info;
30 
31 public:
32  MCInstrAnalysis(const MCInstrInfo *Info) : Info(Info) {}
33  virtual ~MCInstrAnalysis() = default;
34 
35  virtual bool isBranch(const MCInst &Inst) const {
36  return Info->get(Inst.getOpcode()).isBranch();
37  }
38 
39  virtual bool isConditionalBranch(const MCInst &Inst) const {
40  return Info->get(Inst.getOpcode()).isConditionalBranch();
41  }
42 
43  virtual bool isUnconditionalBranch(const MCInst &Inst) const {
44  return Info->get(Inst.getOpcode()).isUnconditionalBranch();
45  }
46 
47  virtual bool isIndirectBranch(const MCInst &Inst) const {
48  return Info->get(Inst.getOpcode()).isIndirectBranch();
49  }
50 
51  virtual bool isCall(const MCInst &Inst) const {
52  return Info->get(Inst.getOpcode()).isCall();
53  }
54 
55  virtual bool isReturn(const MCInst &Inst) const {
56  return Info->get(Inst.getOpcode()).isReturn();
57  }
58 
59  virtual bool isTerminator(const MCInst &Inst) const {
60  return Info->get(Inst.getOpcode()).isTerminator();
61  }
62 
63  /// \brief Given a branch instruction try to get the address the branch
64  /// targets. Return true on success, and the address in Target.
65  virtual bool
66  evaluateBranch(const MCInst &Inst, uint64_t Addr, uint64_t Size,
67  uint64_t &Target) const;
68 };
69 
70 } // end namespace llvm
71 
72 #endif // LLVM_MC_MCINSTRANALYSIS_H
virtual bool isReturn(const MCInst &Inst) const
Compute iterated dominance frontiers using a linear time algorithm.
Definition: AllocatorList.h:24
virtual bool evaluateBranch(const MCInst &Inst, uint64_t Addr, uint64_t Size, uint64_t &Target) const
Given a branch instruction try to get the address the branch targets.
virtual bool isConditionalBranch(const MCInst &Inst) const
virtual bool isUnconditionalBranch(const MCInst &Inst) const
Instances of this class represent a single low-level machine instruction.
Definition: MCInst.h:159
virtual bool isBranch(const MCInst &Inst) const
const MCInstrInfo * Info
Interface to description of machine instruction set.
Definition: MCInstrInfo.h:24
virtual bool isIndirectBranch(const MCInst &Inst) const
virtual ~MCInstrAnalysis()=default
virtual bool isTerminator(const MCInst &Inst) const
Target - Wrapper for Target specific information.
const MCInstrDesc & get(unsigned Opcode) const
Return the machine instruction descriptor that corresponds to the specified instruction opcode...
Definition: MCInstrInfo.h:45
MCInstrAnalysis(const MCInstrInfo *Info)
constexpr char Size[]
Key for Kernel::Arg::Metadata::mSize.
virtual bool isCall(const MCInst &Inst) const
unsigned getOpcode() const
Definition: MCInst.h:172