1/*
2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23package org.graalvm.compiler.phases.common;
24
25import org.graalvm.compiler.graph.Graph.NodeEventScope;
26import org.graalvm.compiler.nodes.StructuredGraph;
27import org.graalvm.compiler.phases.BasePhase;
28import org.graalvm.compiler.phases.PhaseSuite;
29import org.graalvm.compiler.phases.common.util.HashSetNodeEventListener;
30import org.graalvm.compiler.phases.tiers.PhaseContext;
31
32/**
33 * A phase suite that applies {@linkplain CanonicalizerPhase canonicalization} to a graph after all
34 * phases in the suite have been applied if any of the phases changed the graph.
35 */
36public class IncrementalCanonicalizerPhase<C extends PhaseContext> extends PhaseSuite<C> {
37
38    private final CanonicalizerPhase canonicalizer;
39
40    public IncrementalCanonicalizerPhase(CanonicalizerPhase canonicalizer) {
41        this.canonicalizer = canonicalizer;
42    }
43
44    public IncrementalCanonicalizerPhase(CanonicalizerPhase canonicalizer, BasePhase<? super C> phase) {
45        this.canonicalizer = canonicalizer;
46        appendPhase(phase);
47    }
48
49    @Override
50    @SuppressWarnings("try")
51    protected void run(StructuredGraph graph, C context) {
52        HashSetNodeEventListener listener = new HashSetNodeEventListener();
53        try (NodeEventScope nes = graph.trackNodeEvents(listener)) {
54            super.run(graph, context);
55        }
56
57        if (!listener.getNodes().isEmpty()) {
58            canonicalizer.applyIncremental(graph, context, listener.getNodes(), null, false);
59        }
60    }
61}
62