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  */
  23 package org.graalvm.compiler.phases.common;
  24 
  25 import org.graalvm.compiler.graph.Graph.NodeEventScope;
  26 import org.graalvm.compiler.nodes.StructuredGraph;
  27 import org.graalvm.compiler.phases.BasePhase;
  28 import org.graalvm.compiler.phases.PhaseSuite;
  29 import org.graalvm.compiler.phases.common.util.HashSetNodeEventListener;
  30 import 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  */
  36 public 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 }