--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.phases/src/org/graalvm/compiler/phases/LazyName.java	2017-02-15 17:08:23.927241912 -0800
@@ -0,0 +1,63 @@
+/*
+ * 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.phases;
+
+import org.graalvm.compiler.debug.Debug;
+
+/**
+ * A name whose {@link String} value is computed only when it is needed. This is useful in
+ * combination with debugging facilities such as {@link Debug#scope(Object)} where the
+ * {@link String} value of a name is only needed if debugging is enabled.
+ */
+public abstract class LazyName implements CharSequence {
+
+    private String value;
+
+    @Override
+    public int length() {
+        return toString().length();
+    }
+
+    @Override
+    public char charAt(int index) {
+        return toString().charAt(index);
+    }
+
+    @Override
+    public CharSequence subSequence(int start, int end) {
+        return toString().subSequence(start, end);
+    }
+
+    @Override
+    public final String toString() {
+        if (value == null) {
+            value = createString();
+        }
+        return value;
+    }
+
+    /**
+     * Creates the {@link String} value of this name.
+     */
+    protected abstract String createString();
+}