hg: shenandoah/jdk9/hotspot: Add option to leave barriers in the c2 compiled code for constant oops

[rwestrel at redhat.com]

Changeset: 6aecc827bf1b
Author:    roland
Date:      2016-07-08 10:55 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/6aecc827bf1b

Add option to leave barriers in the c2 compiled code for constant oops

! src/share/vm/gc/shenandoah/shenandoah_globals.hpp
! src/share/vm/opto/callGenerator.cpp
! src/share/vm/opto/graphKit.cpp
! src/share/vm/opto/library_call.cpp
! src/share/vm/opto/memnode.cpp
! src/share/vm/opto/phaseX.cpp
! src/share/vm/opto/shenandoahSupport.cpp
! src/share/vm/opto/shenandoahSupport.hpp
! src/share/vm/opto/stringopts.cpp
! src/share/vm/opto/subnode.cpp
! src/share/vm/opto/type.cpp