667
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1 /*
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2 * Copyright 2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 */
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23
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24 /**
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25 * @test
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26 * @bug 6636138
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27 * @summary SuperWord::co_locate_pack(Node_List* p) generates memory graph that leads to memory order violation.
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28 *
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29 * @run main/othervm -server -Xbatch -XX:CompileOnly=Test2.shift -XX:+UseSuperword Test2
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30 */
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31
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32 class Test2 {
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33
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34 public static void init(int src[]) {
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35 // Initialize the array
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36 for (int i = 0; i < src.length; i++)
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37 src[i] = i;
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38 }
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39
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40 public static void shift(int src[]) {
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41 //left-shift the array
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42 for (int i = src.length-1; i > 0; i--){
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43 int tmp = src[i];
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44 src[i] = src[i-1];
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45 src[i-1] = tmp;
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46 }
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47 }
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48
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49 public static void verify(int src[]) {
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50 for (int i = 0; i < src.length; i++){
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51 int value = (i-1 + src.length)%src.length; // correct value after shifting
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52 if (src[i] != value) {
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53 System.out.println("Error: src["+i+"] should be "+ value + " instead of " + src[i]);
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54 System.exit(-1);
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55 }
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56 }
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57 }
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58
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59 public static void test() {
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60 int[] src = new int[10];
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61 init(src);
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62 shift(src);
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63 verify(src);
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64 }
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65
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66 public static void main(String[] args) {
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67 for (int i=0; i< 2000; i++)
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68 test();
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69 }
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70 }
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