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/********************* */
/*! \file bool_to_bv.h
** \verbatim
** Top contributors (to current version):
** Yoni Zohar, Makai Mann, Liana Hadarean
** This file is part of the CVC4 project.
** Copyright (c) 2009-2019 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 The BoolToBV preprocessing pass
**
**/
#include "cvc4_private.h"
#ifndef CVC4__PREPROCESSING__PASSES__BOOL_TO_BV_H
#define CVC4__PREPROCESSING__PASSES__BOOL_TO_BV_H
#include "preprocessing/preprocessing_pass.h"
#include "preprocessing/preprocessing_pass_context.h"
#include "theory/bv/theory_bv_utils.h"
#include "util/statistics_registry.h"
namespace CVC4 {
namespace preprocessing {
namespace passes {
class BoolToBV : public PreprocessingPass
{
public:
BoolToBV(PreprocessingPassContext* preprocContext);
protected:
PreprocessingPassResult applyInternal(
AssertionPipeline* assertionsToPreprocess) override;
private:
struct Statistics
{
IntStat d_numIteToBvite;
IntStat d_numTermsLowered;
IntStat d_numTermsForcedLowered;
Statistics();
~Statistics();
};
/* Takes an assertion and tries to create more bit-vector structure */
Node lowerAssertion(const TNode& a);
/* Tries to lower one node to a width-one bit-vector */
void lowerNode(const TNode& n);
/* Returns cached node if it exists, otherwise returns the node */
Node fromCache(TNode n) const;
/** Checks if any of the nodes children were rebuilt,
* in which case n needs to be rebuilt as well
*/
bool needToRebuild(TNode n) const;
Statistics d_statistics;
/* Keeps track of lowered nodes */
std::unordered_map<Node, Node, NodeHashFunction> d_lowerCache;
}; // class BoolToBV
} // namespace passes
} // namespace preprocessing
} // namespace CVC4
#endif /* CVC4__PREPROCESSING__PASSES__BOOL_TO_BV_H */
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