RemoveRedundantRelations.cpp

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/*
 * Souffle - A Datalog Compiler
 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved
 * Licensed under the Universal Permissive License v 1.0 as shown at:
 * - https://opensource.org/licenses/UPL
 * - <souffle root>/licenses/SOUFFLE-UPL.txt
 */
 
/************************************************************************
 *
 * @file RemoveRedundantRelations.cpp
 *
 ***********************************************************************/
 
#include "ast/transform/RemoveRedundantRelations.h"
#include "ast/Relation.h"
#include "ast/TranslationUnit.h"
#include "ast/analysis/RedundantRelations.h"
#include "ast/utility/Utils.h"
#include <set>
 
namespace souffle::ast::transform {
 
bool RemoveRedundantRelationsTransformer::transform(TranslationUnit& translationUnit) {
    bool changed = false;
    auto* redundantRelationsAnalysis = translationUnit.getAnalysis<analysis::RedundantRelationsAnalysis>();
    const std::set<const Relation*>& redundantRelations = redundantRelationsAnalysis->getRedundantRelations();
    if (!redundantRelations.empty()) {
        for (auto rel : redundantRelations) {
            removeRelation(translationUnit, rel->getQualifiedName());
            changed = true;
        }
    }
    return changed;
}
 
}  // namespace souffle::ast::transform