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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 #include "llvm/MC/MCInst.h"
16 #include "llvm/MC/MCInstrDesc.h"
17 #include "llvm/MC/MCInstrInfo.h"
18 
19 namespace llvm {
20 
21 class MCInstrAnalysis {
22 protected:
23   friend class Target;
24   const MCInstrInfo *Info;
25 
26 public:
MCInstrAnalysis(const MCInstrInfo * Info)27   MCInstrAnalysis(const MCInstrInfo *Info) : Info(Info) {}
28 
~MCInstrAnalysis()29   virtual ~MCInstrAnalysis() {}
30 
isBranch(const MCInst & Inst)31   virtual bool isBranch(const MCInst &Inst) const {
32     return Info->get(Inst.getOpcode()).isBranch();
33   }
34 
isConditionalBranch(const MCInst & Inst)35   virtual bool isConditionalBranch(const MCInst &Inst) const {
36     return Info->get(Inst.getOpcode()).isBranch();
37   }
38 
isUnconditionalBranch(const MCInst & Inst)39   virtual bool isUnconditionalBranch(const MCInst &Inst) const {
40     return Info->get(Inst.getOpcode()).isUnconditionalBranch();
41   }
42 
isIndirectBranch(const MCInst & Inst)43   virtual bool isIndirectBranch(const MCInst &Inst) const {
44     return Info->get(Inst.getOpcode()).isIndirectBranch();
45   }
46 
isCall(const MCInst & Inst)47   virtual bool isCall(const MCInst &Inst) const {
48     return Info->get(Inst.getOpcode()).isCall();
49   }
50 
isReturn(const MCInst & Inst)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