--- a/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/ArrayCopySnippets.java	Thu Jun 20 16:59:58 2013 +0200
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/ArrayCopySnippets.java	Thu Jun 20 16:59:58 2013 +0200
@@ -180,9 +180,6 @@
     public static void arrayObjectCopy(Object src, int srcPos, Object dest, int destPos, int length) {
         objectCounter.inc();
         checkedCopy(src, srcPos, dest, destPos, length, Kind.Object);
-        if (length > 0) {
-            GenericArrayRangeWriteBarrier.insertWriteBarrier(dest, destPos, length);
-        }
     }
 
     @Snippet

--- a/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/UnsafeArrayCopyNode.java	Thu Jun 20 16:59:58 2013 +0200
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/UnsafeArrayCopyNode.java	Thu Jun 20 16:59:58 2013 +0200
@@ -31,7 +31,7 @@
 import com.oracle.graal.nodes.type.*;
 import com.oracle.graal.replacements.SnippetTemplate.Arguments;
 
-public final class UnsafeArrayCopyNode extends AbstractStateSplit implements Lowerable, MemoryCheckpoint.Single {
+public final class UnsafeArrayCopyNode extends ArrayRangeWriteNode implements Lowerable, MemoryCheckpoint.Single {
 
     @Input private ValueNode src;
     @Input private ValueNode srcPos;
@@ -62,6 +62,26 @@
         this(src, srcPos, dest, destPos, length, layoutHelper, null);
     }
 
+    @Override
+    public ValueNode getArray() {
+        return dest;
+    }
+
+    @Override
+    public ValueNode getIndex() {
+        return destPos;
+    }
+
+    @Override
+    public ValueNode getLength() {
+        return length;
+    }
+
+    @Override
+    public boolean isObjectArray() {
+        return elementKind == Kind.Object;
+    }
+
     public Kind getElementKind() {
         return elementKind;
     }