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/********************* */
/*! \file bv_to_bool.h
** \verbatim
** Top contributors (to current version):
** Liana Hadarean, Clark Barrett, Paul Meng
** This file is part of the CVC4 project.
** Copyright (c) 2009-2017 by the authors listed in the file AUTHORS
** in the top-level source directory) and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief Preprocessing pass that lifts bit-vectors of size 1 to booleans.
**
** Preprocessing pass that lifts bit-vectors of size 1 to booleans.
**/
#include "cvc4_private.h"
#ifndef __CVC4__THEORY__BV__BV_TO_BOOL_H
#define __CVC4__THEORY__BV__BV_TO_BOOL_H
#include "theory/bv/theory_bv_utils.h"
#include "util/statistics_registry.h"
namespace CVC4 {
namespace theory {
namespace bv {
typedef __gnu_cxx::hash_map<Node, Node, NodeHashFunction> NodeNodeMap;
class BvToBoolPreprocessor {
struct Statistics {
IntStat d_numTermsLifted;
IntStat d_numAtomsLifted;
IntStat d_numTermsForcedLifted;
IntStat d_numTermsLowered;
IntStat d_numAtomsLowered;
IntStat d_numTermsForcedLowered;
Statistics();
~Statistics();
};
NodeNodeMap d_liftCache;
NodeNodeMap d_boolCache;
Node d_one;
Node d_zero;
void addToBoolCache(TNode term, Node new_term);
Node getBoolCache(TNode term) const;
bool hasBoolCache(TNode term) const;
void addToLiftCache(TNode term, Node new_term);
Node getLiftCache(TNode term) const;
bool hasLiftCache(TNode term) const;
bool isConvertibleBvTerm(TNode node);
bool isConvertibleBvAtom(TNode node);
Node convertBvAtom(TNode node);
Node convertBvTerm(TNode node);
Node liftNode(TNode current);
Statistics d_statistics;
NodeNodeMap d_lowerCache;
void addToLowerCache(TNode term, Node new_term);
Node getLowerCache(TNode term) const;
bool hasLowerCache(TNode term) const;
Node lowerNode(TNode current, bool topLevel = false);
public:
BvToBoolPreprocessor();
void liftBvToBool(const std::vector<Node>& assertions, std::vector<Node>& new_assertions);
void lowerBoolToBv(const std::vector<Node>& assertions, std::vector<Node>& new_assertions);
};
}/* CVC4::theory::bv namespace */
}/* CVC4::theory namespace */
}/* CVC4 namespace */
#endif /* __CVC4__THEORY__BV__BV_TO_BOOL_H */
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