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