SimpleConstraintManager.h revision 218887 
1//== SimpleConstraintManager.h ----------------------------------*- 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//  Code shared between BasicConstraintManager and RangeConstraintManager.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_CLANG_GR_SIMPLE_CONSTRAINT_MANAGER_H
15#define LLVM_CLANG_GR_SIMPLE_CONSTRAINT_MANAGER_H
16
17#include "clang/StaticAnalyzer/Core/PathSensitive/ConstraintManager.h"
18#include "clang/StaticAnalyzer/Core/PathSensitive/GRState.h"
19
20namespace clang {
21
22namespace ento {
23
24class SimpleConstraintManager : public ConstraintManager {
25  SubEngine &SU;
26public:
27  SimpleConstraintManager(SubEngine &subengine) : SU(subengine) {}
28  virtual ~SimpleConstraintManager();
29
30  //===------------------------------------------------------------------===//
31  // Common implementation for the interface provided by ConstraintManager.
32  //===------------------------------------------------------------------===//
33
34  bool canReasonAbout(SVal X) const;
35
36  const GRState *assume(const GRState *state, DefinedSVal Cond,
37                        bool Assumption);
38
39  const GRState *assume(const GRState *state, Loc Cond, bool Assumption);
40
41  const GRState *assume(const GRState *state, NonLoc Cond, bool Assumption);
42
43  const GRState *assumeSymRel(const GRState *state,
44                              const SymExpr *LHS,
45                              BinaryOperator::Opcode op,
46                              const llvm::APSInt& Int);
47
48protected:
49
50  //===------------------------------------------------------------------===//
51  // Interface that subclasses must implement.
52  //===------------------------------------------------------------------===//
53
54  // Each of these is of the form "$sym+Adj <> V", where "<>" is the comparison
55  // operation for the method being invoked.
56  virtual const GRState *assumeSymNE(const GRState *state, SymbolRef sym,
57                                     const llvm::APSInt& V,
58                                     const llvm::APSInt& Adjustment) = 0;
59
60  virtual const GRState *assumeSymEQ(const GRState *state, SymbolRef sym,
61                                     const llvm::APSInt& V,
62                                     const llvm::APSInt& Adjustment) = 0;
63
64  virtual const GRState *assumeSymLT(const GRState *state, SymbolRef sym,
65                                     const llvm::APSInt& V,
66                                     const llvm::APSInt& Adjustment) = 0;
67
68  virtual const GRState *assumeSymGT(const GRState *state, SymbolRef sym,
69                                     const llvm::APSInt& V,
70                                     const llvm::APSInt& Adjustment) = 0;
71
72  virtual const GRState *assumeSymLE(const GRState *state, SymbolRef sym,
73                                     const llvm::APSInt& V,
74                                     const llvm::APSInt& Adjustment) = 0;
75
76  virtual const GRState *assumeSymGE(const GRState *state, SymbolRef sym,
77                                     const llvm::APSInt& V,
78                                     const llvm::APSInt& Adjustment) = 0;
79
80  //===------------------------------------------------------------------===//
81  // Internal implementation.
82  //===------------------------------------------------------------------===//
83
84  const GRState *assumeAux(const GRState *state, Loc Cond,bool Assumption);
85
86  const GRState *assumeAux(const GRState *state, NonLoc Cond, bool Assumption);
87};
88
89} // end GR namespace
90
91} // end clang namespace
92
93#endif
94