# HG changeset patch
# User Christos Kotselidis <christos.kotselidis@oracle.com>
# Date 1375443795 -7200
# Node ID 56a86b60c9d30ced789451c5907b839c52cd80d8
# Parent  b9718191858c3711613376e271d9699c6482a43a
Early exit of SerialArrayRange barrier if vector length==0

diff -r b9718191858c -r 56a86b60c9d3 graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/WriteBarrierSnippets.java
--- a/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/WriteBarrierSnippets.java	Fri Aug 02 13:40:01 2013 +0200
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/WriteBarrierSnippets.java	Fri Aug 02 13:43:15 2013 +0200
@@ -75,6 +75,9 @@
 
     @Snippet
     public static void serialArrayRangeWriteBarrier(Object object, int startIndex, int length) {
+        if (length == 0) {
+            return;
+        }
         Object dest = FixedValueAnchorNode.getObject(object);
         int cardShift = cardTableShift();
         long cardStart = cardTableStart();