hg: shenandoah/jdk: Cherry-pick: 8213615: GC/C2 abstraction for escape analysis

[roman at kennke.org]

Changeset: 6527441de37e
Author:    rkennke
Date:      2018-11-15 10:59 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/6527441de37e

Cherry-pick: 8213615: GC/C2 abstraction for escape analysis

! 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/escape.cpp
! src/hotspot/share/opto/escape.hpp