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3345
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1 /*
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2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 /**
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26 * @test
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27 * @bug 7020614
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28 * @summary "-server" mode optimizer makes code hang
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29 *
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30 * @run main/othervm/timeout=30 -Xbatch Test7020614
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31 */
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32
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33 public class Test7020614 {
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34
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35 private static final int ITERATIONS = 1000;
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36 private static int doNotOptimizeOut = 0;
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37
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38 public static long bitCountShort() {
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39 long t0 = System.currentTimeMillis();
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40 int sum = 0;
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41 for (int it = 0; it < ITERATIONS; ++it) {
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42 short value = 0;
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43 do {
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44 sum += Integer.bitCount(value);
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45 } while (++value != 0);
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46 }
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47 doNotOptimizeOut += sum;
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48 return System.currentTimeMillis() - t0;
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49 }
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50
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51 public static void main(String[] args) {
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52 for (int i = 0; i < 4; ++i) {
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53 System.out.println((i + 1) + ": " + bitCountShort());
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54 }
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55 System.out.println("doNotOptimizeOut value: " + doNotOptimizeOut);
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56 }
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57 }
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58
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