1 /*
   2  * Copyright (c) 2011, 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 /**
  26  * @test
  27  * @bug 7020614
  28  * @summary "-server" mode optimizer makes code hang
  29  *
  30  * @run main/othervm/timeout=30 -Xbatch Test7020614
  31  */
  32 
  33 public class Test7020614 {
  34 
  35     private static final int ITERATIONS = 1000;
  36     private static int doNotOptimizeOut = 0;
  37 
  38     public static long bitCountShort() {
  39         long t0 = System.currentTimeMillis();
  40         int sum = 0;
  41         for (int it = 0; it < ITERATIONS; ++it) {
  42             short value = 0;
  43             do {
  44                 sum += Integer.bitCount(value);
  45             } while (++value != 0);
  46         }
  47         doNotOptimizeOut += sum;
  48         return System.currentTimeMillis() - t0;
  49     }
  50 
  51     public static void main(String[] args) {
  52         for (int i = 0; i < 4; ++i) {
  53             System.out.println((i + 1) + ": " + bitCountShort());
  54         }
  55         System.out.println("doNotOptimizeOut value: " + doNotOptimizeOut);
  56     }
  57 }
  58