--- /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/virtual/EnsureVirtualizedNode.java	2017-02-15 17:07:59.726182353 -0800
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 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.virtual;
+
+import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0;
+import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0;
+
+import org.graalvm.compiler.core.common.type.Stamp;
+import org.graalvm.compiler.core.common.type.StampFactory;
+import org.graalvm.compiler.graph.Node;
+import org.graalvm.compiler.graph.NodeClass;
+import org.graalvm.compiler.graph.VerificationError;
+import org.graalvm.compiler.nodeinfo.NodeInfo;
+import org.graalvm.compiler.nodes.AbstractEndNode;
+import org.graalvm.compiler.nodes.FixedNode;
+import org.graalvm.compiler.nodes.FixedWithNextNode;
+import org.graalvm.compiler.nodes.Invoke;
+import org.graalvm.compiler.nodes.ValueNode;
+import org.graalvm.compiler.nodes.java.StoreFieldNode;
+import org.graalvm.compiler.nodes.spi.Lowerable;
+import org.graalvm.compiler.nodes.spi.LoweringTool;
+import org.graalvm.compiler.nodes.spi.Virtualizable;
+import org.graalvm.compiler.nodes.spi.VirtualizerTool;
+import org.graalvm.compiler.nodes.type.StampTool;
+import org.graalvm.compiler.nodes.util.GraphUtil;
+
+@NodeInfo(cycles = CYCLES_0, size = SIZE_0)
+public final class EnsureVirtualizedNode extends FixedWithNextNode implements Virtualizable, Lowerable {
+
+    public static final NodeClass<EnsureVirtualizedNode> TYPE = NodeClass.create(EnsureVirtualizedNode.class);
+
+    @Input ValueNode object;
+    private final boolean localOnly;
+
+    public EnsureVirtualizedNode(ValueNode object, boolean localOnly) {
+        super(TYPE, StampFactory.forVoid());
+        this.object = object;
+        this.localOnly = localOnly;
+    }
+
+    @Override
+    public void virtualize(VirtualizerTool tool) {
+        ValueNode alias = tool.getAlias(object);
+        if (alias instanceof VirtualObjectNode) {
+            VirtualObjectNode virtual = (VirtualObjectNode) alias;
+            if (virtual instanceof VirtualBoxingNode) {
+                Throwable exception = new VerificationError("ensureVirtual is not valid for boxing objects: %s", virtual.type().getName());
+                throw GraphUtil.approxSourceException(this, exception);
+            }
+            if (!localOnly) {
+                tool.setEnsureVirtualized(virtual, true);
+            }
+            tool.delete();
+        }
+    }
+
+    @Override
+    public void lower(LoweringTool tool) {
+        ensureVirtualFailure(this, object.stamp());
+    }
+
+    public static void ensureVirtualFailure(Node location, Stamp stamp) {
+        String additionalReason = "";
+        if (location instanceof FixedWithNextNode && !(location instanceof EnsureVirtualizedNode)) {
+            FixedWithNextNode fixedWithNextNode = (FixedWithNextNode) location;
+            FixedNode next = fixedWithNextNode.next();
+            if (next instanceof StoreFieldNode) {
+                additionalReason = " (must not store virtual object into a field)";
+            } else if (next instanceof Invoke) {
+                additionalReason = " (must not pass virtual object into an invoke that cannot be inlined)";
+            } else {
+                additionalReason = " (must not let virtual object escape at node " + next + ")";
+            }
+        }
+        Throwable exception = new VerificationError("Object of type %s should not be materialized%s:", StampTool.typeOrNull(stamp).getName(), additionalReason);
+
+        Node pos;
+        if (location instanceof FixedWithNextNode) {
+            pos = ((FixedWithNextNode) location).next();
+        } else if (location instanceof AbstractEndNode) {
+            pos = ((AbstractEndNode) location).merge();
+        } else {
+            pos = location;
+        }
+        throw GraphUtil.approxSourceException(pos, exception);
+    }
+}