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//== ConstraintManager.h - Constraints on symbolic values.-------*- C++ -*--==//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defined the interface to manage constraints on symbolic values.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_ANALYSIS_CONSTRAINT_MANAGER_H
#define LLVM_CLANG_ANALYSIS_CONSTRAINT_MANAGER_H
// FIXME: Typedef LiveSymbolsTy/DeadSymbolsTy at a more appropriate place.
#include "clang/Checker/PathSensitive/Store.h"
namespace llvm {
class APSInt;
}
namespace clang {
class GRState;
class GRStateManager;
class GRSubEngine;
class SVal;
class ConstraintManager {
public:
virtual ~ConstraintManager();
virtual const GRState *Assume(const GRState *state, DefinedSVal Cond,
bool Assumption) = 0;
std::pair<const GRState*, const GRState*> AssumeDual(const GRState *state,
DefinedSVal Cond) {
return std::make_pair(Assume(state, Cond, true),
Assume(state, Cond, false));
}
virtual const llvm::APSInt* getSymVal(const GRState *state,
SymbolRef sym) const = 0;
virtual bool isEqual(const GRState *state, SymbolRef sym,
const llvm::APSInt& V) const = 0;
virtual const GRState *RemoveDeadBindings(const GRState *state,
SymbolReaper& SymReaper) = 0;
virtual void print(const GRState *state, llvm::raw_ostream& Out,
const char* nl, const char *sep) = 0;
virtual void EndPath(const GRState *state) {}
/// canReasonAbout - Not all ConstraintManagers can accurately reason about
/// all SVal values. This method returns true if the ConstraintManager can
/// reasonably handle a given SVal value. This is typically queried by
/// GRExprEngine to determine if the value should be replaced with a
/// conjured symbolic value in order to recover some precision.
virtual bool canReasonAbout(SVal X) const = 0;
};
ConstraintManager* CreateBasicConstraintManager(GRStateManager& statemgr,
GRSubEngine &subengine);
ConstraintManager* CreateRangeConstraintManager(GRStateManager& statemgr,
GRSubEngine &subengine);
} // end clang namespace
#endif
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