Mercurial > hg > graal-compiler
annotate test/compiler/loopopts/TestDeadBackbranchArrayAccess.java @ 21500:ac86179c56ad
Merge.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Tue, 26 May 2015 20:48:30 +0200 |
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1 /* |
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2 * Copyright (c) 2014, 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 8054478 |
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28 * @summary dead backbranch in main loop results in erroneous array access |
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29 * @run main/othervm -XX:CompileOnly=TestDeadBackbranchArrayAccess -Xcomp TestDeadBackbranchArrayAccess |
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30 * |
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31 */ |
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32 |
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33 public class TestDeadBackbranchArrayAccess { |
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34 static char[] pattern0 = {0}; |
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35 static char[] pattern1 = {1}; |
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36 |
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37 static void test(char[] array) { |
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38 if (pattern1 == null) return; |
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39 |
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40 int i = 0; |
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41 int pos = 0; |
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42 char c = array[pos]; |
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43 |
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44 while (i >= 0 && (c == pattern0[i] || c == pattern1[i])) { |
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45 i--; |
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46 pos--; |
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47 if (pos != -1) { |
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48 c = array[pos]; |
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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 main(String[] args) { |
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54 for (int i = 0; i < 1000000; i++) { |
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55 test(new char[1]); |
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56 } |
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57 } |
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58 } |