--- a/src/hotspot/share/gc/shenandoah/c2/shenandoahSupport.cpp	Thu Aug 01 07:14:03 2019 -0700
+++ b/src/hotspot/share/gc/shenandoah/c2/shenandoahSupport.cpp	Fri Aug 02 11:21:41 2019 +0200
@@ -3087,6 +3087,7 @@
       return needs_barrier_impl(phase, n->in(1), visited);
     case Op_LoadN:
       return true;
+    case Op_CMoveN:
     case Op_CMoveP:
       return needs_barrier_impl(phase, n->in(2), visited) ||
              needs_barrier_impl(phase, n->in(3), visited);
@@ -3238,6 +3239,7 @@
       case Op_StrComp:
       case Op_StrIndexOf:
       case Op_StrIndexOfChar:
+      case Op_HasNegatives:
         if (!ShenandoahOptimizeStableFinals) {
            strength = WEAK;
         }