# HG changeset patch
# User dsimms
# Date 1389364710 -3600
# Node ID 3be3b8a032a5508646c1c5620cee18d3e69fc708
# Parent  46236fe5d1fe7264b3094a71b14d7bb77b279555
8029858: Enhance array copies
Summary: Just read the source element once
Reviewed-by: coleenp, ahgross

diff -r 46236fe5d1fe -r 3be3b8a032a5 src/share/vm/oops/objArrayKlass.cpp
--- a/src/share/vm/oops/objArrayKlass.cpp	Thu Jan 09 07:55:58 2014 -0800
+++ b/src/share/vm/oops/objArrayKlass.cpp	Fri Jan 10 15:38:30 2014 +0100
@@ -149,7 +149,7 @@
         if (element_is_null ||
             Klass::cast((new_val->klass()))->is_subtype_of(bound)) {
           bs->write_ref_field_pre(p, new_val);
-          *p = *from;
+          *p = element;
         } else {
           // We must do a barrier to cover the partial copy.
           const size_t pd = pointer_delta(p, dst, (size_t)heapOopSize);