hg: shenandoah/jdk8u/hotspot: backport shenandoah C2 support from jdk9

[rwestrel at redhat.com]

Changeset: da17b9cffd4f
Author:    roland
Date:      2016-12-08 13:28 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/da17b9cffd4f

backport shenandoah C2 support from jdk9

! src/share/vm/adlc/formssel.cpp
! src/share/vm/adlc/formssel.hpp
! src/share/vm/adlc/output_c.cpp
! src/share/vm/adlc/output_h.cpp
! src/share/vm/ci/ciInstanceKlass.cpp
! src/share/vm/ci/ciInstanceKlass.hpp
! src/share/vm/opto/addnode.cpp
! src/share/vm/opto/callGenerator.cpp
! src/share/vm/opto/callnode.cpp
! src/share/vm/opto/callnode.hpp
! src/share/vm/opto/cfgnode.cpp
! src/share/vm/opto/compile.cpp
! src/share/vm/opto/compile.hpp
! src/share/vm/opto/connode.cpp
! src/share/vm/opto/connode.hpp
! src/share/vm/opto/escape.cpp
! src/share/vm/opto/gcm.cpp
! src/share/vm/opto/graphKit.cpp
! src/share/vm/opto/graphKit.hpp
! src/share/vm/opto/lcm.cpp
! src/share/vm/opto/library_call.cpp
! src/share/vm/opto/loopPredicate.cpp
! src/share/vm/opto/loopTransform.cpp
! src/share/vm/opto/loopnode.cpp
! src/share/vm/opto/loopnode.hpp
! src/share/vm/opto/loopopts.cpp
! src/share/vm/opto/machnode.cpp
! src/share/vm/opto/machnode.hpp
! src/share/vm/opto/macro.cpp
! src/share/vm/opto/matcher.cpp
! src/share/vm/opto/matcher.hpp
! src/share/vm/opto/memnode.cpp
! src/share/vm/opto/memnode.hpp
! src/share/vm/opto/multnode.cpp
! src/share/vm/opto/multnode.hpp
! src/share/vm/opto/node.cpp
! src/share/vm/opto/node.hpp
! src/share/vm/opto/parse2.cpp
! src/share/vm/opto/parse3.cpp
! src/share/vm/opto/phaseX.cpp
! src/share/vm/opto/phaseX.hpp
! src/share/vm/opto/runtime.cpp
! src/share/vm/opto/runtime.hpp
! 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/superword.cpp
! src/share/vm/opto/superword.hpp
! src/share/vm/opto/type.cpp
! src/share/vm/opto/type.hpp