hg: shenandoah/jdk9/hotspot: Make process-weakrefs code not check for need-updates on hot path. Don't push objects on mark queue that don't have refs. Cleanup cruft in marking code.

[roman at kennke.org]

Changeset: 315269d6330c
Author:    rkennke
Date:      2015-11-02 22:39 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/315269d6330c

Make process-weakrefs code not check for need-updates on hot path. Don't push objects on mark queue that don't have refs. Cleanup cruft in marking code.

! src/share/vm/gc/shenandoah/shenandoahConcurrentMark.cpp
! src/share/vm/gc/shenandoah/shenandoahConcurrentMark.hpp
! src/share/vm/gc/shenandoah/shenandoahConcurrentMark.inline.hpp