--- old/src/hotspot/share/opto/compile.cpp	2018-12-03 17:48:12.796083489 +0100
+++ new/src/hotspot/share/opto/compile.cpp	2018-12-03 17:48:12.642084589 +0100
@@ -3061,7 +3061,7 @@
         Node *m = wq.at(next);
         for (DUIterator_Fast imax, i = m->fast_outs(imax); i < imax; i++) {
           Node* use = m->fast_out(i);
-          if (use->is_Mem() || use->is_EncodeNarrowPtr()) {
+          if (use->is_Mem() || use->is_EncodeNarrowPtr() || use->is_ShenandoahBarrier()) {
             use->ensure_control_or_add_prec(n->in(0));
           } else {
             switch(use->Opcode()) {