hg: shenandoah/jdk9/hotspot: Speed up test for allocated-after-mark-start, which is used very frequently during marking.

[roman at kennke.org]

Changeset: 52d2ef23efe3
Author:    rkennke
Date:      2016-04-06 16:29 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/52d2ef23efe3

Speed up test for allocated-after-mark-start, which is used very frequently during marking.

! src/share/vm/gc/shenandoah/shenandoahHeap.cpp
! src/share/vm/gc/shenandoah/shenandoahHeap.hpp
! src/share/vm/gc/shenandoah/shenandoahHeap.inline.hpp
! src/share/vm/gc/shenandoah/shenandoahHeapRegion.cpp