--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.phases.common/src/org/graalvm/compiler/phases/common/WriteBarrierAdditionPhase.java	Thu Jun 27 03:33:44 2019 +0200
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2013, 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+
+package org.graalvm.compiler.phases.common;
+
+import org.graalvm.compiler.debug.DebugCloseable;
+import org.graalvm.compiler.nodes.StructuredGraph;
+import org.graalvm.compiler.nodes.gc.BarrierSet;
+import org.graalvm.compiler.nodes.memory.FixedAccessNode;
+import org.graalvm.compiler.phases.BasePhase;
+import org.graalvm.compiler.phases.tiers.MidTierContext;
+
+public class WriteBarrierAdditionPhase extends BasePhase<MidTierContext> {
+    @SuppressWarnings("try")
+    @Override
+    protected void run(StructuredGraph graph, MidTierContext context) {
+        BarrierSet barrierSet = context.getGC().getBarrierSet();
+        for (FixedAccessNode n : graph.getNodes().filter(FixedAccessNode.class)) {
+            try (DebugCloseable scope = n.graph().withNodeSourcePosition(n)) {
+                barrierSet.addBarriers(n);
+            }
+        }
+    }
+
+    @Override
+    public boolean checkContract() {
+        return false;
+    }
+}
+