001/*
002 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.phases.common;
024
025import com.oracle.graal.graph.Graph.NodeEventScope;
026import com.oracle.graal.nodes.*;
027import com.oracle.graal.phases.*;
028import com.oracle.graal.phases.common.util.*;
029import com.oracle.graal.phases.tiers.*;
030
031/**
032 * A phase suite that applies {@linkplain CanonicalizerPhase canonicalization} to a graph after all
033 * phases in the suite have been applied if any of the phases changed the graph.
034 */
035public class IncrementalCanonicalizerPhase<C extends PhaseContext> extends PhaseSuite<C> {
036
037    private final CanonicalizerPhase canonicalizer;
038
039    public IncrementalCanonicalizerPhase(CanonicalizerPhase canonicalizer) {
040        this.canonicalizer = canonicalizer;
041    }
042
043    public IncrementalCanonicalizerPhase(CanonicalizerPhase canonicalizer, BasePhase<? super C> phase) {
044        this.canonicalizer = canonicalizer;
045        appendPhase(phase);
046    }
047
048    @Override
049    protected void run(StructuredGraph graph, C context) {
050        HashSetNodeEventListener listener = new HashSetNodeEventListener();
051        try (NodeEventScope nes = graph.trackNodeEvents(listener)) {
052            super.run(graph, context);
053        }
054
055        if (!listener.getNodes().isEmpty()) {
056            canonicalizer.applyIncremental(graph, context, listener.getNodes(), null, false);
057        }
058    }
059}