hg: shenandoah/jdk9/hotspot: Clearing control during final graph reshape causes memory barrier to loose dependency on null check

[rwestrel at redhat.com]

Changeset: 14e5d162b959
Author:    roland
Date:      2016-09-30 11:30 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/14e5d162b959

Clearing control during final graph reshape causes memory barrier to loose dependency on null check

! src/share/vm/opto/compile.cpp
+ test/gc/shenandoah/compiler/TestWriteBarrierClearControl.java