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 
22 namespace llvm {
23 
24 class MCInstrAnalysis {
25 protected:
26   friend class Target;
27   const MCInstrInfo *Info;
28 
29 public:
MCInstrAnalysis(const MCInstrInfo * Info)30   MCInstrAnalysis(const MCInstrInfo *Info) : Info(Info) {}
31 
~MCInstrAnalysis()32   virtual ~MCInstrAnalysis() {}
33 
isBranch(const MCInst & Inst)34   virtual bool isBranch(const MCInst &Inst) const {
35     return Info->get(Inst.getOpcode()).isBranch();
36   }
37 
isConditionalBranch(const MCInst & Inst)38   virtual bool isConditionalBranch(const MCInst &Inst) const {
39     return Info->get(Inst.getOpcode()).isConditionalBranch();
40   }
41 
isUnconditionalBranch(const MCInst & Inst)42   virtual bool isUnconditionalBranch(const MCInst &Inst) const {
43     return Info->get(Inst.getOpcode()).isUnconditionalBranch();
44   }
45 
isIndirectBranch(const MCInst & Inst)46   virtual bool isIndirectBranch(const MCInst &Inst) const {
47     return Info->get(Inst.getOpcode()).isIndirectBranch();
48   }
49 
isCall(const MCInst & Inst)50   virtual bool isCall(const MCInst &Inst) const {
51     return Info->get(Inst.getOpcode()).isCall();
52   }
53 
isReturn(const MCInst & Inst)54   virtual bool isReturn(const MCInst &Inst) const {
55     return Info->get(Inst.getOpcode()).isReturn();
56   }
57 
isTerminator(const MCInst & Inst)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