hg: shenandoah/jdk9/hotspot: Optimize object/array marking with bit-stealing task encoding.

[ashipile at redhat.com]

Changeset: 53c734d6690b
Author:    shade
Date:      2017-01-16 17:31 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/53c734d6690b

Optimize object/array marking with bit-stealing task encoding.

! src/share/vm/gc/shared/taskqueue.hpp
! src/share/vm/gc/shenandoah/shenandoahConcurrentMark.hpp
! src/share/vm/gc/shenandoah/shenandoahConcurrentMark.inline.hpp
! src/share/vm/gc/shenandoah/shenandoahTaskqueue.hpp
! src/share/vm/runtime/arguments.cpp