--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.api.dsl.test/src/com/oracle/truffle/api/dsl/test/TestSerialization.java	Mon Dec 29 23:38:54 2014 +0100
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2014, 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 com.oracle.truffle.api.dsl.test;
+
+import static com.oracle.truffle.api.dsl.test.TestHelper.*;
+import static org.junit.Assert.*;
+
+import org.junit.*;
+
+import com.oracle.truffle.api.dsl.*;
+import com.oracle.truffle.api.dsl.test.TestSerializationFactory.SerializedNodeFactory;
+import com.oracle.truffle.api.dsl.test.TypeSystemTest.TestRootNode;
+import com.oracle.truffle.api.dsl.test.TypeSystemTest.ValueNode;
+import com.oracle.truffle.api.nodes.*;
+
+public class TestSerialization {
+
+    @Test
+    public void testUpdateRoot() {
+        /* Tests the unexpected polymorphic case. */
+        TestRootNode<SerializedNode> node = TestHelper.createRoot(SerializedNodeFactory.getInstance());
+        assertEquals(true, executeWith(node, true));
+        assertEquals(21, executeWith(node, 21));
+        assertEquals("s", executeWith(node, "s"));
+        assertEquals(3, node.getNode().invocations);
+        assertEquals(NodeCost.POLYMORPHIC, node.getNode().getCost());
+
+        @SuppressWarnings("unchecked")
+        TestRootNode<SerializedNode> copiedNode = (TestRootNode<SerializedNode>) node.deepCopy();
+        copiedNode.adoptChildren();
+        assertTrue(copiedNode != node);
+        assertEquals(true, executeWith(copiedNode, true));
+        assertEquals(21, executeWith(copiedNode, 21));
+        assertEquals("s", executeWith(copiedNode, "s"));
+        assertEquals(6, copiedNode.getNode().invocations);
+    }
+
+    @NodeChild
+    abstract static class SerializedNode extends ValueNode {
+
+        int invocations;
+
+        @Specialization
+        int add(int left) {
+            invocations++;
+            return left;
+        }
+
+        @Specialization
+        boolean add(boolean left) {
+            invocations++;
+            return left;
+        }
+
+        @Specialization
+        String add(String left) {
+            invocations++;
+            return left;
+        }
+
+    }
+
+}