src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core/src/org/graalvm/compiler/core/phases/GraphChangeMonitoringPhase.java

rev 52509 : [mq]: graal2

@@ -32,11 +32,11 @@
 import org.graalvm.compiler.graph.Node;
 import org.graalvm.compiler.nodes.LogicConstantNode;
 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.common.util.EconomicSetNodeEventListener;
 import org.graalvm.compiler.phases.tiers.PhaseContext;
 
 /**
  * A utility phase for detecting when a phase would change the graph and reporting extra information
  * about the effects. The phase is first run on a copy of the graph and if a change in that graph is

@@ -66,11 +66,11 @@
     protected void run(StructuredGraph graph, C context) {
         /*
          * Phase may add nodes but not end up using them so ignore additions. Nodes going dead and
          * having their inputs change are the main interesting differences.
          */
-        HashSetNodeEventListener listener = new HashSetNodeEventListener().exclude(NodeEvent.NODE_ADDED);
+        EconomicSetNodeEventListener listener = new EconomicSetNodeEventListener().exclude(NodeEvent.NODE_ADDED);
         StructuredGraph graphCopy = (StructuredGraph) graph.copy(graph.getDebug());
         DebugContext debug = graph.getDebug();
         try (NodeEventScope s = graphCopy.trackNodeEvents(listener)) {
             try (DebugContext.Scope s2 = debug.sandbox("WithoutMonitoring", null)) {
                 super.run(graphCopy, context);

@@ -88,11 +88,11 @@
                 filteredNodes.add(n);
             }
         }
         if (!filteredNodes.isEmpty()) {
             /* rerun it on the real graph in a new Debug scope so Dump and Log can find it. */
-            listener = new HashSetNodeEventListener();
+            listener = new EconomicSetNodeEventListener();
             try (NodeEventScope s = graph.trackNodeEvents(listener)) {
                 try (DebugContext.Scope s2 = debug.scope("WithGraphChangeMonitoring")) {
                     if (debug.isDumpEnabled(DebugContext.DETAILED_LEVEL)) {
                         debug.dump(DebugContext.DETAILED_LEVEL, graph, "*** Before phase %s", getName());
                     }