1 /*
   2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 8136469
  27  * @summary C2's string concatenation optimization fails with pre-sized StringBuilder
  28  * @run main/othervm -XX:CompileCommand=dontinline,TestPresizedStringBuilder::test TestPresizedStringBuilder
  29  */
  30 public class TestPresizedStringBuilder {
  31 
  32   static final boolean count;
  33   static {
  34     count = true;
  35   }
  36 
  37   public static void main(String[] args) {
  38     for (int i = 0; i < 100_000; ++i) {
  39       test();
  40     }
  41   }
  42 
  43   public static String test() {
  44     return new StringBuilder(count ? 1 : 2).toString();
  45   }
  46 }
  47