hg: hsx/jdk7u/hotspot: 8023472: C2 optimization breaks with G1

[vladimir.kozlov at oracle.com]

Changeset: 55221e76f69e
Author:    kvn
Date:      2013-08-23 18:04 -0700
URL:       http://hg.openjdk.java.net/hsx/jdk7u/hotspot/rev/55221e76f69e

8023472: C2 optimization breaks with G1
Summary: set control edge for previous value load in G1 pre-barrier
Reviewed-by: twisti

! src/share/vm/opto/graphKit.cpp
+ test/compiler/gcbarriers/G1CrashTest.java