--- old/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/meta/DefaultHotSpotLoweringProvider.java	2019-05-14 01:06:06.640416676 +0200
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/meta/DefaultHotSpotLoweringProvider.java	2019-05-14 01:06:06.232413703 +0200
@@ -583,16 +583,6 @@
         graph.replaceFixed(storeHub, hub);
     }
 
-    @Override
-    public BarrierType fieldInitializationBarrier(JavaKind entryKind) {
-        return (entryKind == JavaKind.Object && !runtime.getVMConfig().useDeferredInitBarriers) ? BarrierType.IMPRECISE : BarrierType.NONE;
-    }
-
-    @Override
-    public BarrierType arrayInitializationBarrier(JavaKind entryKind) {
-        return (entryKind == JavaKind.Object && !runtime.getVMConfig().useDeferredInitBarriers) ? BarrierType.PRECISE : BarrierType.NONE;
-    }
-
     private void lowerOSRStartNode(OSRStartNode osrStart) {
         StructuredGraph graph = osrStart.graph();
         if (graph.getGuardsStage() == StructuredGraph.GuardsStage.FIXED_DEOPTS) {
@@ -783,12 +773,11 @@
     @Override
     protected BarrierType fieldLoadBarrierType(ResolvedJavaField f) {
         HotSpotResolvedJavaField loadField = (HotSpotResolvedJavaField) f;
-        BarrierType barrierType = BarrierType.NONE;
-        if (runtime.getVMConfig().useG1GC && loadField.getJavaKind() == JavaKind.Object && metaAccess.lookupJavaType(Reference.class).equals(loadField.getDeclaringClass()) &&
+        if (loadField.getJavaKind() == JavaKind.Object && metaAccess.lookupJavaType(Reference.class).equals(loadField.getDeclaringClass()) &&
                         loadField.getName().equals("referent")) {
-            barrierType = BarrierType.PRECISE;
+            return BarrierType.WEAK_FIELD;
         }
-        return barrierType;
+        return super.fieldLoadBarrierType(f);
     }
 
     @Override