--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.graph/src/org/graalvm/compiler/graph/NodeUsageIterable.java	2017-02-15 16:58:40.285782836 -0800
@@ -0,0 +1,65 @@
+/*
+ * 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 static org.graalvm.compiler.graph.Graph.isModificationCountsEnabled;
+
+import org.graalvm.compiler.graph.iterators.NodeIterable;
+
+class NodeUsageIterable implements NodeIterable<Node> {
+
+    private final Node node;
+
+    NodeUsageIterable(Node node) {
+        this.node = node;
+    }
+
+    @Override
+    public NodeUsageIterator iterator() {
+        if (isModificationCountsEnabled()) {
+            return new NodeUsageWithModCountIterator(node);
+        } else {
+            return new NodeUsageIterator(node);
+        }
+    }
+
+    @Override
+    public Node first() {
+        return node.usage0;
+    }
+
+    @Override
+    public boolean isEmpty() {
+        return node.usage0 == null;
+    }
+
+    @Override
+    public boolean isNotEmpty() {
+        return node.usage0 != null;
+    }
+
+    @Override
+    public int count() {
+        return node.getUsageCount();
+    }
+}