hg: shenandoah/jdk10/hotspot: write barrier can get stuck below predicates resulting in unschedulable graph

[rwestrel at redhat.com]

Changeset: 78b9766107cc
Author:    roland
Date:      2017-07-19 10:28 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk10/hotspot/rev/78b9766107cc

write barrier can get stuck below predicates resulting in unschedulable graph

! src/share/vm/opto/loopnode.cpp