--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/compiler/7179138/Test7179138_1.java	Tue Jun 26 09:06:16 2012 -0700
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2012 Skip Balk.  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.
+ */
+
+/*
+ * @test
+ * @bug 7179138
+ * @summary Incorrect result with String concatenation optimization
+ * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:-TieredCompilation Test7179138_1
+ *
+ * @author Skip Balk
+ */
+
+public class Test7179138_1 {
+    public static void main(String[] args) throws Exception {
+        System.out.println("Java Version: " + System.getProperty("java.vm.version"));
+        long[] durations = new long[60];
+        for (int i = 0; i < 100000; i++) {
+            // this empty for-loop is required to reproduce this bug
+            for (long duration : durations) {
+                // do nothing
+            }
+            {
+                String s = "test";
+                int len = s.length();
+
+                s = new StringBuilder(String.valueOf(s)).append(s).toString();
+                len = len + len;
+
+                s = new StringBuilder(String.valueOf(s)).append(s).toString();
+                len = len + len;
+
+                s = new StringBuilder(String.valueOf(s)).append(s).toString();
+                len = len + len;
+
+                if (s.length() != len) {
+                    System.out.println("Failed at iteration: " + i);
+                    System.out.println("Length mismatch: " + s.length() + " <> " + len);
+                    System.out.println("Expected: \"" + "test" + "test" + "test" + "test" + "test" + "test" + "test" + "test" + "\"");
+                    System.out.println("Actual:   \"" + s + "\"");
+                    System.exit(97);
+                }
+            }
+        }
+    }
+}
+