hg: jdk/jdk: 8212753: Improve oopDesc::forward_to_atomic

[thomas.schatzl at oracle.com]

Changeset: 1587306fe23f
Author:    tschatzl
Date:      2018-10-24 16:22 +0200
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/1587306fe23f

8212753: Improve oopDesc::forward_to_atomic
Summary: Avoid multiple unnecessary reloads of the mark oop in oopDesc::forward_to_atomic
Reviewed-by: kbarrett, mdoerr

! src/hotspot/share/gc/cms/parNewGeneration.cpp
! src/hotspot/share/gc/g1/g1ParScanThreadState.cpp
! src/hotspot/share/oops/oop.hpp
! src/hotspot/share/oops/oop.inline.hpp