--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/VirtualState.java	2017-02-15 17:06:54.889343973 -0800
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2012, 2015, 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.nodes;
+
+import org.graalvm.compiler.graph.Node;
+import org.graalvm.compiler.graph.NodeClass;
+import org.graalvm.compiler.nodeinfo.InputType;
+import org.graalvm.compiler.nodeinfo.NodeInfo;
+
+/**
+ * Base class for nodes that contain "virtual" state, like FrameState and VirtualObjectState.
+ * Subclasses of this class will be treated in a special way by the scheduler.
+ */
+@NodeInfo(allowedUsageTypes = {InputType.State})
+public abstract class VirtualState extends Node {
+
+    protected VirtualState(NodeClass<? extends VirtualState> c) {
+        super(c);
+    }
+
+    public static final NodeClass<VirtualState> TYPE = NodeClass.create(VirtualState.class);
+
+    public abstract static class NodeClosure<T extends Node> {
+
+        public abstract void apply(Node usage, T node);
+    }
+
+    public interface VirtualClosure {
+
+        void apply(VirtualState node);
+    }
+
+    public abstract VirtualState duplicateWithVirtualState();
+
+    public abstract void applyToNonVirtual(NodeClosure<? super ValueNode> closure);
+
+    /**
+     * Performs a <b>pre-order</b> iteration over all elements reachable from this state that are a
+     * subclass of {@link VirtualState}.
+     */
+    public abstract void applyToVirtual(VirtualClosure closure);
+
+    public abstract boolean isPartOfThisState(VirtualState state);
+
+    @Override
+    public final StructuredGraph graph() {
+        return (StructuredGraph) super.graph();
+    }
+
+}