lib/StaticAnalyzer/Core/SimpleConstraintManager.h

   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/PathSensitive/ConstraintManager.h"
  18 #include "clang/StaticAnalyzer/PathSensitive/GRState.h"
  19
  20 namespace clang {
  21
  22 namespace ento {
  23
  24 class SimpleConstraintManager : public ConstraintManager {
  25   SubEngine &SU;
  26 public:
  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
  48 protected:
  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