/*

 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

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package org.graalvm.compiler.phases.common;

import org.graalvm.compiler.graph.Graph.NodeEventScope;

import org.graalvm.compiler.nodes.StructuredGraph;

import org.graalvm.compiler.phases.BasePhase;

import org.graalvm.compiler.phases.PhaseSuite;

import org.graalvm.compiler.phases.common.util.HashSetNodeEventListener;

import org.graalvm.compiler.phases.tiers.PhaseContext;

/**

 * A phase suite that applies {@linkplain CanonicalizerPhase canonicalization} to a graph after all

 * phases in the suite have been applied if any of the phases changed the graph.

 */

public class IncrementalCanonicalizerPhase<C extends PhaseContext> extends PhaseSuite<C> {

    private final CanonicalizerPhase canonicalizer;

    public IncrementalCanonicalizerPhase(CanonicalizerPhase canonicalizer) {

        this.canonicalizer = canonicalizer;

    }

    public IncrementalCanonicalizerPhase(CanonicalizerPhase canonicalizer, BasePhase<? super C> phase) {

        this.canonicalizer = canonicalizer;

        appendPhase(phase);

    }

    @Override

    @SuppressWarnings("try")

    protected void run(StructuredGraph graph, C context) {

        HashSetNodeEventListener listener = new HashSetNodeEventListener();

        try (NodeEventScope nes = graph.trackNodeEvents(listener)) {

            super.run(graph, context);

        }

        if (!listener.getNodes().isEmpty()) {

            canonicalizer.applyIncremental(graph, context, listener.getNodes(), null, false);

        }

    }

}