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annotate test/compiler/6805724/Test6805724.java @ 1552:c18cbe5936b8

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6941466: Oracle rebranding changes for Hotspot repositories Summary: Change all the Sun copyrights to Oracle copyright Reviewed-by: ohair
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date Thu, 27 May 2010 19:08:38 -0700
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1 /*
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2 * Copyright (c) 2009, 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 * @test
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26 * @bug 6805724
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27 * @summary ModLNode::Ideal() generates functionally incorrect graph when divisor is any (2^k-1) constant.
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28 *
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29 * @run main/othervm -Xcomp -XX:CompileOnly=Test6805724.fcomp Test6805724
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30 */
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31
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32 import java.net.URLClassLoader;
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33
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34 public class Test6805724 implements Runnable {
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35 // Initialize DIVISOR so that it is final in this class.
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36 static final long DIVISOR; // 2^k-1 constant
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37
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38 static {
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39 long value = 0;
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40 try {
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41 value = Long.decode(System.getProperty("divisor"));
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42 } catch (Throwable t) {
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43 // This one is required for the Class.forName() in main.
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44 }
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45 DIVISOR = value;
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46 }
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47
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48 static long fint(long x) {
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49 return x % DIVISOR;
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50 }
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51
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52 static long fcomp(long x) {
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53 return x % DIVISOR;
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54 }
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55
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56 public void run() {
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57 long a = 0x617981E1L;
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58
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59 long expected = fint(a);
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60 long result = fcomp(a);
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61
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62 if (result != expected)
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63 throw new InternalError(result + " != " + expected);
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64 }
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65
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66 public static void main(String args[]) throws Exception {
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67 Class cl = Class.forName("Test6805724");
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68 URLClassLoader apploader = (URLClassLoader) cl.getClassLoader();
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69
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70 // Iterate over all 2^k-1 divisors.
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71 for (int k = 1; k < Long.SIZE; k++) {
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72 long divisor = (1L << k) - 1;
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73 System.setProperty("divisor", "" + divisor);
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74 ClassLoader loader = new URLClassLoader(apploader.getURLs(), apploader.getParent());
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75 Class c = loader.loadClass("Test6805724");
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76 Runnable r = (Runnable) c.newInstance();
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77 r.run();
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78 }
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79 }
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80 }