aoqi@0: /*
aoqi@0:  * Copyright 2012 Skip Balk.  All Rights Reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: /*
aoqi@0:  * @test
aoqi@0:  * @bug 7179138
aoqi@0:  * @summary Incorrect result with String concatenation optimization
aoqi@0:  * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:-TieredCompilation Test7179138_1
aoqi@0:  *
aoqi@0:  * @author Skip Balk
aoqi@0:  */
aoqi@0: 
aoqi@0: public class Test7179138_1 {
aoqi@0:     public static void main(String[] args) throws Exception {
aoqi@0:         System.out.println("Java Version: " + System.getProperty("java.vm.version"));
aoqi@0:         long[] durations = new long[60];
aoqi@0:         for (int i = 0; i < 100000; i++) {
aoqi@0:             // this empty for-loop is required to reproduce this bug
aoqi@0:             for (long duration : durations) {
aoqi@0:                 // do nothing
aoqi@0:             }
aoqi@0:             {
aoqi@0:                 String s = "test";
aoqi@0:                 int len = s.length();
aoqi@0: 
aoqi@0:                 s = new StringBuilder(String.valueOf(s)).append(s).toString();
aoqi@0:                 len = len + len;
aoqi@0: 
aoqi@0:                 s = new StringBuilder(String.valueOf(s)).append(s).toString();
aoqi@0:                 len = len + len;
aoqi@0: 
aoqi@0:                 s = new StringBuilder(String.valueOf(s)).append(s).toString();
aoqi@0:                 len = len + len;
aoqi@0: 
aoqi@0:                 if (s.length() != len) {
aoqi@0:                     System.out.println("Failed at iteration: " + i);
aoqi@0:                     System.out.println("Length mismatch: " + s.length() + " <> " + len);
aoqi@0:                     System.out.println("Expected: \"" + "test" + "test" + "test" + "test" + "test" + "test" + "test" + "test" + "\"");
aoqi@0:                     System.out.println("Actual:   \"" + s + "\"");
aoqi@0:                     System.exit(97);
aoqi@0:                 }
aoqi@0:             }
aoqi@0:         }
aoqi@0:     }
aoqi@0: }
aoqi@0: