--- /dev/null	2016-05-31 09:42:47.975716356 -0700
+++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.graph/src/org/graalvm/compiler/graph/spi/Simplifiable.java	2016-12-09 00:48:34.198883422 -0800
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2012, 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.graph.spi;
+
+/**
+ * This interface allows nodes to perform more complicated simplifications, in contrast to
+ * {@link Canonicalizable}, which supports only replacing the current node.
+ *
+ * Implementors of this interface need to be aware that they need to call
+ * {@link SimplifierTool#addToWorkList(org.graalvm.compiler.graph.Node)} for each node that might be
+ * influenced (in terms of simplification and canonicalization) by the actions performed in
+ * simplify.
+ */
+public interface Simplifiable {
+
+    void simplify(SimplifierTool tool);
+}