# HG changeset patch
# User Lukas Stadler <lukas.stadler@jku.at>
# Date 1353932400 -3600
# Node ID 24950e93b962f64e27f0ba811d7069a969a67edf
# Parent  be508977fb47a6d0756c6cdf1173c8d71222ea70
only perform PEA iteration if there are analyzable nodes

diff -r be508977fb47 -r 24950e93b962 graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/virtual/BoxedVirtualObjectNode.java
--- a/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/virtual/BoxedVirtualObjectNode.java	Mon Nov 26 13:19:32 2012 +0100
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/virtual/BoxedVirtualObjectNode.java	Mon Nov 26 13:20:00 2012 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -54,7 +54,7 @@
     }
 
     @Override
-    public Object fieldName(int index) {
+    public String fieldName(int index) {
         assert index == 0;
         return "value";
     }
diff -r be508977fb47 -r 24950e93b962 graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/virtual/VirtualArrayNode.java
--- a/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/virtual/VirtualArrayNode.java	Mon Nov 26 13:19:32 2012 +0100
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/virtual/VirtualArrayNode.java	Mon Nov 26 13:20:00 2012 +0100
@@ -67,7 +67,7 @@
     }
 
     @Override
-    public Object fieldName(int index) {
+    public String fieldName(int index) {
         return "[" + index + "]";
     }
 }
diff -r be508977fb47 -r 24950e93b962 graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/virtual/VirtualInstanceNode.java
--- a/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/virtual/VirtualInstanceNode.java	Mon Nov 26 13:19:32 2012 +0100
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/virtual/VirtualInstanceNode.java	Mon Nov 26 13:20:00 2012 +0100
@@ -67,7 +67,7 @@
     }
 
     @Override
-    public Object fieldName(int index) {
+    public String fieldName(int index) {
         return fields[index].getName();
     }
 
diff -r be508977fb47 -r 24950e93b962 graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/virtual/VirtualObjectNode.java
--- a/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/virtual/VirtualObjectNode.java	Mon Nov 26 13:19:32 2012 +0100
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/virtual/VirtualObjectNode.java	Mon Nov 26 13:20:00 2012 +0100
@@ -52,7 +52,7 @@
         // nothing to do...
     }
 
-    public abstract Object fieldName(int i);
+    public abstract String fieldName(int i);
 
     public void materializeAt(@SuppressWarnings("unused") FixedNode fixed) {
         // nothing to do in here - this method allows subclasses to respond to materialization
diff -r be508977fb47 -r 24950e93b962 graal/com.oracle.graal.virtual/src/com/oracle/graal/virtual/phases/ea/PartialEscapeAnalysisPhase.java
--- a/graal/com.oracle.graal.virtual/src/com/oracle/graal/virtual/phases/ea/PartialEscapeAnalysisPhase.java	Mon Nov 26 13:19:32 2012 +0100
+++ b/graal/com.oracle.graal.virtual/src/com/oracle/graal/virtual/phases/ea/PartialEscapeAnalysisPhase.java	Mon Nov 26 13:20:00 2012 +0100
@@ -23,12 +23,14 @@
 package com.oracle.graal.virtual.phases.ea;
 
 import java.util.*;
+import java.util.concurrent.*;
 
 import com.oracle.graal.api.code.*;
 import com.oracle.graal.api.meta.*;
 import com.oracle.graal.debug.*;
 import com.oracle.graal.graph.*;
 import com.oracle.graal.nodes.*;
+import com.oracle.graal.nodes.spi.*;
 import com.oracle.graal.phases.*;
 import com.oracle.graal.phases.common.*;
 import com.oracle.graal.phases.graph.*;
@@ -65,17 +67,30 @@
             return;
         }
 
-        for (int iteration = 0; iteration < GraalOptions.EscapeAnalysisIterations; iteration++) {
-            Debug.scope("iteration " + iteration, new Runnable() {
+        boolean analyzableNodes = false;
+        for (Node node : graph.getNodes()) {
+            if (node instanceof EscapeAnalyzable) {
+                analyzableNodes = true;
+                break;
+            }
+        }
+        if (!analyzableNodes) {
+            return;
+        }
+
+        Boolean continueIteration = true;
+        for (int iteration = 0; iteration < GraalOptions.EscapeAnalysisIterations && continueIteration; iteration++) {
+            continueIteration = Debug.scope("iteration " + iteration, new Callable<Boolean>() {
+
                 @Override
-                public void run() {
+                public Boolean call() {
                     SchedulePhase schedule = new SchedulePhase();
                     schedule.apply(graph, false);
                     PartialEscapeClosure closure = new PartialEscapeClosure(graph.createNodeBitMap(), schedule, runtime);
                     ReentrantBlockIterator.apply(closure, schedule.getCFG().getStartBlock(), new BlockState(), null);
 
                     if (closure.getVirtualIdCount() == 0) {
-                        return;
+                        return false;
                     }
 
                     // apply the effects collected during the escape analysis iteration
@@ -90,11 +105,12 @@
 
                     new DeadCodeEliminationPhase().apply(graph);
                     if (!iterative) {
-                        return;
+                        return false;
                     }
                     if (GraalOptions.OptCanonicalizer) {
                         new CanonicalizerPhase(target, runtime, assumptions).apply(graph);
                     }
+                    return true;
                 }
             });
         }