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/****************************************************************************** |
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* Top contributors (to current version): |
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* Andrew Reynolds, Aina Niemetz |
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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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* This class caches the evaluation of nodes on a fixed list of examples. |
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*/ |
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#include "theory/quantifiers/sygus/example_eval_cache.h" |
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#include "theory/quantifiers/sygus/example_min_eval.h" |
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using namespace cvc5; |
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using namespace cvc5::kind; |
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namespace cvc5 { |
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namespace theory { |
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namespace quantifiers { |
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ExampleEvalCache::ExampleEvalCache(TermDbSygus* tds, |
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Node e) |
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: d_tds(tds), d_stn(e.getType()) |
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{ |
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d_indexSearchVals = !d_tds->isVariableAgnosticEnumerator(e); |
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} |
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ExampleEvalCache::~ExampleEvalCache() {} |
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void ExampleEvalCache::addExample(const std::vector<Node>& ex) |
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{ |
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d_examples.push_back(ex); |
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} |
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Node ExampleEvalCache::addSearchVal(TypeNode tn, Node bv) |
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{ |
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if (!d_indexSearchVals) |
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{ |
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// not indexing search values |
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return Node::null(); |
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} |
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std::vector<Node> vals; |
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evaluateVec(bv, vals, true); |
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Trace("sygus-pbe-debug") << "Add to trie..." << std::endl; |
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Node ret = d_trie[tn].addOrGetTerm(bv, vals); |
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Trace("sygus-pbe-debug") << "...got " << ret << std::endl; |
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// Only save the cache data if necessary: if the enumerated term |
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// is redundant, its cached data will not be used later and thus should |
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// be discarded. This applies also to the case where the evaluation |
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// was cached prior to this call. |
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if (ret != bv) |
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{ |
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clearEvaluationCache(bv); |
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} |
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Assert(ret.getType().isComparableTo(bv.getType())); |
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return ret; |
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} |
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void ExampleEvalCache::evaluateVec(Node bv, |
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std::vector<Node>& exOut, |
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bool doCache) |
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{ |
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// is it in the cache? |
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std::map<Node, std::vector<Node>>::iterator it = d_exOutCache.find(bv); |
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if (it != d_exOutCache.end()) |
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{ |
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exOut.insert(exOut.end(), it->second.begin(), it->second.end()); |
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return; |
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} |
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// get the evaluation |
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evaluateVecInternal(bv, exOut); |
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// store in cache if necessary |
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if (doCache) |
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{ |
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std::vector<Node>& eocv = d_exOutCache[bv]; |
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eocv.insert(eocv.end(), exOut.begin(), exOut.end()); |
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} |
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} |
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void ExampleEvalCache::evaluateVecInternal(Node bv, |
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std::vector<Node>& exOut) const |
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{ |
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// use ExampleMinEval |
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SygusTypeInfo& ti = d_tds->getTypeInfo(d_stn); |
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const std::vector<Node>& varlist = ti.getVarList(); |
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EmeEvalTds emetds(d_tds, d_stn); |
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ExampleMinEval eme(bv, varlist, &emetds); |
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for (size_t j = 0, esize = d_examples.size(); j < esize; j++) |
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{ |
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Node res = eme.evaluate(d_examples[j]); |
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exOut.push_back(res); |
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} |
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} |
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Node ExampleEvalCache::evaluate(Node bn, unsigned i) const |
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{ |
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Assert(i < d_examples.size()); |
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return d_tds->evaluateBuiltin(d_stn, bn, d_examples[i]); |
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} |
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void ExampleEvalCache::clearEvaluationCache(Node bv) |
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{ |
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Assert(d_exOutCache.find(bv) != d_exOutCache.end()); |
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d_exOutCache.erase(bv); |
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} |
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void ExampleEvalCache::clearEvaluationAll() { d_exOutCache.clear(); } |
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} // namespace quantifiers |
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} // namespace theory |
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} // namespace cvc5 |