--- /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/NodeUsageIterator.java	2016-12-07 13:49:17.734929518 -0800
@@ -0,0 +1,73 @@
+/*
+ * 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 org.graalvm.compiler.graph;
+
+import java.util.Iterator;
+import java.util.NoSuchElementException;
+
+class NodeUsageIterator implements Iterator<Node> {
+
+    final Node node;
+    int index = -1;
+    Node current;
+
+    void advance() {
+        current = null;
+        index++;
+        if (index == 0) {
+            current = node.usage0;
+        } else if (index == 1) {
+            current = node.usage1;
+        } else {
+            int relativeIndex = index - Node.INLINE_USAGE_COUNT;
+            if (relativeIndex < node.extraUsagesCount) {
+                current = node.extraUsages[relativeIndex];
+            }
+        }
+    }
+
+    NodeUsageIterator(Node node) {
+        this.node = node;
+        advance();
+    }
+
+    @Override
+    public boolean hasNext() {
+        return current != null;
+    }
+
+    @Override
+    public Node next() {
+        Node result = current;
+        if (result == null) {
+            throw new NoSuchElementException();
+        }
+        advance();
+        return result;
+    }
+
+    @Override
+    public void remove() {
+        throw new UnsupportedOperationException();
+    }
+}