--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodeinfo/src/org/graalvm/compiler/nodeinfo/StructuralInput.java	2017-02-15 17:06:23.312963432 -0800
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2015, 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.nodeinfo;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Inherited;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Marker type for describing node inputs in snippets that are not of type {@link InputType#Value}.
+ */
+public abstract class StructuralInput {
+
+    private StructuralInput() {
+        throw new Error("Illegal instance of StructuralInput. This class should be used in snippets only.");
+    }
+
+    @Retention(RetentionPolicy.RUNTIME)
+    @Target(ElementType.TYPE)
+    @Inherited
+    public @interface MarkerType {
+        InputType value();
+    }
+
+    /**
+     * Marker type for {@link InputType#Memory} edges in snippets.
+     */
+    @MarkerType(InputType.Memory)
+    public abstract static class Memory extends StructuralInput {
+    }
+
+    /**
+     * Marker type for {@link InputType#Condition} edges in snippets.
+     */
+    @MarkerType(InputType.Condition)
+    public abstract static class Condition extends StructuralInput {
+    }
+
+    /**
+     * Marker type for {@link InputType#State} edges in snippets.
+     */
+    @MarkerType(InputType.State)
+    public abstract static class State extends StructuralInput {
+    }
+
+    /**
+     * Marker type for {@link InputType#Guard} edges in snippets.
+     */
+    @MarkerType(InputType.Guard)
+    public abstract static class Guard extends StructuralInput {
+    }
+
+    /**
+     * Marker type for {@link InputType#Anchor} edges in snippets.
+     */
+    @MarkerType(InputType.Anchor)
+    public abstract static class Anchor extends StructuralInput {
+    }
+
+    /**
+     * Marker type for {@link InputType#Association} edges in snippets.
+     */
+    @MarkerType(InputType.Association)
+    public abstract static class Association extends StructuralInput {
+    }
+
+    /**
+     * Marker type for {@link InputType#Extension} edges in snippets.
+     */
+    @MarkerType(InputType.Extension)
+    public abstract static class Extension extends StructuralInput {
+    }
+}