1 /*
   2  * Copyright (c) 2013, 2018, 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 
  24 
  25 package org.graalvm.compiler.phases.common;
  26 
  27 import org.graalvm.compiler.graph.Graph.NodeEventScope;
  28 import org.graalvm.compiler.nodes.StructuredGraph;
  29 import org.graalvm.compiler.nodes.spi.CoreProviders;
  30 import org.graalvm.compiler.phases.BasePhase;
  31 import org.graalvm.compiler.phases.PhaseSuite;
  32 import org.graalvm.compiler.phases.common.util.EconomicSetNodeEventListener;
  33 
  34 /**
  35  * A phase suite that applies {@linkplain CanonicalizerPhase canonicalization} to a graph after all
  36  * phases in the suite have been applied if any of the phases changed the graph.
  37  */
  38 public class IncrementalCanonicalizerPhase<C extends CoreProviders> extends PhaseSuite<C> {
  39 
  40     private final CanonicalizerPhase canonicalizer;
  41 
  42     public IncrementalCanonicalizerPhase(CanonicalizerPhase canonicalizer) {
  43         this.canonicalizer = canonicalizer;
  44     }
  45 
  46     public IncrementalCanonicalizerPhase(CanonicalizerPhase canonicalizer, BasePhase<? super C> phase) {
  47         this.canonicalizer = canonicalizer;
  48         appendPhase(phase);
  49     }
  50 
  51     @Override
  52     @SuppressWarnings("try")
  53     protected void run(StructuredGraph graph, C context) {
  54         EconomicSetNodeEventListener listener = new EconomicSetNodeEventListener();
  55         try (NodeEventScope nes = graph.trackNodeEvents(listener)) {
  56             super.run(graph, context);
  57         }
  58 
  59         if (!listener.getNodes().isEmpty()) {
  60             canonicalizer.applyIncremental(graph, context, listener.getNodes(), null, false);
  61         }
  62     }
  63 }