# HG changeset patch
# User Doug Simon <doug.simon@oracle.com>
# Date 1412594107 -7200
# Node ID 97198814de417ceeb61e5b3aa4c9314c20211556
# Parent  3152f72f5cdae439bd5c70e843b36cbbb4db89c6
re-enabled use of Unsafe.allocateInstance based mechanism for Node cloning (based on JMH benchmarks)

diff -r 3152f72f5cda -r 97198814de41 graal/com.oracle.graal.graph/src/com/oracle/graal/graph/Node.java
--- a/graal/com.oracle.graal.graph/src/com/oracle/graal/graph/Node.java	Mon Oct 06 12:02:30 2014 +0200
+++ b/graal/com.oracle.graal.graph/src/com/oracle/graal/graph/Node.java	Mon Oct 06 13:15:07 2014 +0200
@@ -60,7 +60,7 @@
 public abstract class Node implements Cloneable, Formattable {
 
     public final static boolean USE_GENERATED_NODES = Boolean.parseBoolean(System.getProperty("graal.useGeneratedNodes", "true"));
-    public final static boolean USE_UNSAFE_TO_CLONE = Boolean.parseBoolean(System.getProperty("graal.useUnsafeToClone", "false"));
+    public final static boolean USE_UNSAFE_TO_CLONE = Boolean.parseBoolean(System.getProperty("graal.useUnsafeToClone", "true"));
 
     static final int DELETED_ID_START = -1000000000;
     static final int INITIAL_ID = -1;
@@ -772,7 +772,8 @@
      */
     final Node clone(Graph into, EnumSet<Edges.Type> edgesToCopy) {
         NodeClass nodeClass = getNodeClass();
-        if (nodeClass.valueNumberable() && nodeClass.isLeafNode()) {
+        boolean isValueNumberableLeaf = nodeClass.valueNumberable() && nodeClass.isLeafNode();
+        if (isValueNumberableLeaf) {
             Node otherNode = into.findNodeInCache(this);
             if (otherNode != null) {
                 return otherNode;
@@ -803,7 +804,7 @@
         into.register(newNode);
         newNode.extraUsages = NO_NODES;
 
-        if (nodeClass.valueNumberable() && nodeClass.isLeafNode()) {
+        if (isValueNumberableLeaf) {
             into.putNodeIntoCache(newNode);
         }
         newNode.afterClone(this);