hg: jdk/jdk: 8204927: ZGC: assert(phase->idom(head) == head->in(LoopNode::EntryControl)) failed

[nils.eliasson at oracle.com]

Changeset: 70ccca2e60aa
Author:    neliasso
Date:      2018-06-15 13:57 +0200
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/70ccca2e60aa

8204927: ZGC: assert(phase->idom(head) == head->in(LoopNode::EntryControl)) failed
Summary: Update idom
Reviewed-by: roland

! src/hotspot/share/gc/z/c2/zBarrierSetC2.cpp