hg: jdk7/hotspot-comp/hotspot: 7009359: HS with -XX:+AggressiveOpts optimize new StringBuffer(null) so it does not throw NPE as expected

[vladimir.kozlov at oracle.com]

Changeset: 2ddb2fab82cb
Author:    kvn
Date:      2010-12-28 17:34 -0800
URL:       http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot/rev/2ddb2fab82cb

7009359: HS with -XX:+AggressiveOpts optimize new StringBuffer(null) so it does not throw NPE as expected
Summary: Bailout StringConcat optimization if null is passed to StringBuffer constructor.
Reviewed-by: iveresov

! src/share/vm/opto/stringopts.cpp
+ test/compiler/7009359/Test7009359.java