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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=Test1.init -XX:+UseSuperword Test1
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30 */
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31
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32 class Test1 {
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33
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34 public static void init(int src[], int [] dst, int[] ref) {
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35 // initialize the arrays
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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 dst[i] = 2; // yes, dst[i] needed(otherwise src[i] will be replaced with i)
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39 ref[i] = src[i]; // src[i] depends on the store src[i]
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40 }
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41 }
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42
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43 public static void verify(int src[], int[] ref) {
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44 // check whether src and ref are equal
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45 for (int i = 0; i < src.length; i++) {
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46 if (src[i] != ref[i]) {
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47 System.out.println("Error: src and ref don't match at " + i);
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48 System.exit(-1);
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49 }
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50 }
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51 }
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52
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53 public static void test() {
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54 int[] src = new int[34];
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55 int[] dst = new int[34];
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56 int[] ref = new int[34];
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57
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58 init(src, dst, ref);
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59 verify(src, ref);
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60 }
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61
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62 public static void main(String[] args) {
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63 for (int i=0; i< 2000; i++) {
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64 test();
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65 }
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66 }
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67 }
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