hg: shenandoah/jdk: Cherry-pick: JDK-8213384: Move G1/C2 barrier verification into G1BarrierSetC2 plus Shenandoah parts

[roman at kennke.org]

Changeset: 4da227336973
Author:    rkennke
Date:      2018-11-06 17:28 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/4da227336973

Cherry-pick: JDK-8213384: Move G1/C2 barrier verification into G1BarrierSetC2 plus Shenandoah parts

! src/hotspot/share/gc/g1/c2/g1BarrierSetC2.cpp
! src/hotspot/share/gc/g1/c2/g1BarrierSetC2.hpp
! src/hotspot/share/gc/shared/c2/barrierSetC2.hpp
! src/hotspot/share/gc/shenandoah/c2/shenandoahBarrierSetC2.cpp
! src/hotspot/share/gc/shenandoah/c2/shenandoahBarrierSetC2.hpp
! src/hotspot/share/gc/z/c2/zBarrierSetC2.cpp
! src/hotspot/share/gc/z/c2/zBarrierSetC2.hpp
! src/hotspot/share/opto/compile.cpp
! src/hotspot/share/opto/compile.hpp