hg: shenandoah/jdk9/hotspot: loop optimizations for shenandoah read barriers

[rwestrel at redhat.com]

Changeset: 4d103d2a2f10
Author:    roland
Date:      2016-09-15 10:07 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/4d103d2a2f10

loop optimizations for shenandoah read barriers

! src/share/vm/opto/loopnode.hpp
! src/share/vm/opto/loopopts.cpp
! src/share/vm/opto/shenandoahSupport.cpp
! src/share/vm/opto/shenandoahSupport.hpp