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/****************************************************************************** |
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* Top contributors (to current version): |
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* Liana Hadarean, Yoni Zohar, Mathias Preiner |
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* |
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* This file is part of the cvc5 project. |
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* |
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* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS |
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* in the top-level source directory and their institutional affiliations. |
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* All rights reserved. See the file COPYING in the top-level source |
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* directory for licensing information. |
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* **************************************************************************** |
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* |
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* Preprocessing pass that lifts bit-vectors of size 1 to booleans. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__PREPROCESSING__PASSES__BV_TO_BOOL_H |
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#define CVC5__PREPROCESSING__PASSES__BV_TO_BOOL_H |
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#include "expr/node.h" |
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#include "preprocessing/preprocessing_pass.h" |
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#include "util/statistics_stats.h" |
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namespace cvc5 { |
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namespace preprocessing { |
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namespace passes { |
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typedef std::unordered_map<Node, Node> NodeNodeMap; |
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class BVToBool : public PreprocessingPass |
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{ |
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public: |
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BVToBool(PreprocessingPassContext* preprocContext); |
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protected: |
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PreprocessingPassResult applyInternal( |
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AssertionPipeline* assertionsToPreprocess) override; |
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private: |
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struct Statistics |
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{ |
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IntStat d_numTermsLifted; |
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IntStat d_numAtomsLifted; |
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IntStat d_numTermsForcedLifted; |
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Statistics(); |
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}; |
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void addToBoolCache(TNode term, Node new_term); |
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Node getBoolCache(TNode term) const; |
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bool hasBoolCache(TNode term) const; |
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void addToLiftCache(TNode term, Node new_term); |
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Node getLiftCache(TNode term) const; |
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bool hasLiftCache(TNode term) const; |
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bool isConvertibleBvTerm(TNode node); |
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bool isConvertibleBvAtom(TNode node); |
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Node convertBvAtom(TNode node); |
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Node convertBvTerm(TNode node); |
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Node liftNode(TNode current); |
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void liftBvToBool(const std::vector<Node>& assertions, |
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std::vector<Node>& new_assertions); |
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NodeNodeMap d_liftCache; |
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NodeNodeMap d_boolCache; |
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Node d_one; |
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Node d_zero; |
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Statistics d_statistics; |
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}; |
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} // namespace passes |
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} // namespace preprocessing |
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} // namespace cvc5 |
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#endif /* CVC5__PREPROCESSING__PASSES__BV_TO_BOOL_H */ |