1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
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  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
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  23 
  24 /**
  25  * @test
  26  * @bug 6805724
  27  * @summary ModLNode::Ideal() generates functionally incorrect graph
  28  *          when divisor is any (2^k-1) constant.
  29  * @library /testlibrary
  30  * @run main/othervm -Xcomp -XX:CompileOnly=Test6805724.fcomp Test6805724
  31  */
  32 
  33 import java.io.File;
  34 import java.net.URL;
  35 import java.net.URLClassLoader;
  36 import jdk.test.lib.Utils;
  37 
  38 public class Test6805724 implements Runnable {
  39     // Initialize DIVISOR so that it is final in this class.
  40     static final long DIVISOR;  // 2^k-1 constant
  41 
  42     static {
  43         long value = 0;
  44         try {
  45             value = Long.decode(System.getProperty("divisor"));
  46         } catch (Throwable t) {
  47             // This one is required for the Class.forName() in main.
  48         }
  49         DIVISOR = value;
  50     }
  51 
  52     static long fint(long x) {
  53         return x % DIVISOR;
  54     }
  55 
  56     static long fcomp(long x) {
  57         return x % DIVISOR;
  58     }
  59 
  60     public void run() {
  61         long a = 0x617981E1L;
  62 
  63         long expected = fint(a);
  64         long result = fcomp(a);
  65 
  66         if (result != expected)
  67             throw new InternalError(result + " != " + expected);
  68     }
  69 
  70     public static void main(String args[]) throws Exception {
  71         Class cl = Class.forName("Test6805724");
  72         ClassLoader apploader = cl.getClassLoader();
  73 
  74         // Iterate over all 2^k-1 divisors.
  75         for (int k = 1; k < Long.SIZE; k++) {
  76             long divisor = (1L << k) - 1;
  77             System.setProperty("divisor", "" + divisor);
  78             ClassLoader loader
  79                     = Utils.getTestClassPathURLClassLoader(apploader.getParent());
  80             Class c = loader.loadClass("Test6805724");
  81             Runnable r = (Runnable) c.newInstance();
  82             r.run();
  83         }
  84     }
  85 }