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 * @test 26 * @bug 7020614 27 * @summary "-server" mode optimizer makes code hang 28 * 29 * @run main/othervm/timeout=30 -Xbatch compiler.c2.Test7020614 30 */ 31 32 package compiler.c2; 33 34 public class Test7020614 { 35 36 private static final int ITERATIONS = 1000; 37 private static int doNotOptimizeOut = 0; 38 bitCountShort()39 public static long bitCountShort() { 40 long t0 = System.currentTimeMillis(); 41 int sum = 0; 42 for (int it = 0; it < ITERATIONS; ++it) { 43 short value = 0; 44 do { 45 sum += Integer.bitCount(value); 46 } while (++value != 0); 47 } 48 doNotOptimizeOut += sum; 49 return System.currentTimeMillis() - t0; 50 } 51 main(String[] args)52 public static void main(String[] args) { 53 for (int i = 0; i < 4; ++i) { 54 System.out.println((i + 1) + ": " + bitCountShort()); 55 } 56 System.out.println("doNotOptimizeOut value: " + doNotOptimizeOut); 57 } 58 } 59 60