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