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 6905845
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28 * @summary Server VM improperly optimizing away loop.
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29 *
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30 * @run main Test6905845
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31 */
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32
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33 public class Test6905845 {
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34
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35 public static void main(String[] args){
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36 for (int asdf = 0; asdf < 5; asdf++){
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37 //test block
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38 {
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39 StringBuilder strBuf1 = new StringBuilder(65);
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40 long start = System.currentTimeMillis();
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41 int count = 0;
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42
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43 for (int i = Integer.MIN_VALUE; i < (Integer.MAX_VALUE - 80); i += 79){
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44 strBuf1.append(i);
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45 count++;
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46 strBuf1.delete(0, 65);
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47 }
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48
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49 System.out.println(count);
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50 if (count != 54366674) {
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51 System.out.println("wrong count: " + count +", should be 54366674");
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52 System.exit(97);
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53 }
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54 }
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55 //test block
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56 {
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57 StringBuilder strBuf1 = new StringBuilder(65);
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58 long start = System.currentTimeMillis();
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59 int count = 0;
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60
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61 for (int i = Integer.MIN_VALUE; i < (Integer.MAX_VALUE - 80); i += 79){
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62 strBuf1.append(i);
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63 count++;
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64 strBuf1.delete(0, 65);
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65 }
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66
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67 System.out.println(count);
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68 if (count != 54366674) {
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69 System.out.println("wrong count: " + count +", should be 54366674");
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70 System.exit(97);
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71 }
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72 }
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73 }
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74 }
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75 }
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76
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