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changeset 10942:56a86b60c9d3

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Early exit of SerialArrayRange barrier if vector length==0
author Christos Kotselidis <christos.kotselidis@oracle.com>
date Fri, 02 Aug 2013 13:43:15 +0200
parents b9718191858c
children ed315765a43a
files graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/WriteBarrierSnippets.java
diffstat 1 files changed, 3 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- 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();