1 /*
   2  * Copyright 2012 SAP AG.  All Rights Reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  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).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /**
  25  * @test
  26  * @bug 8005033
  27  * @summary On sparcv9, C2's intrinsic for Integer.bitCount(OV) returns wrong result if OV is the result of an operation with int overflow.
  28  * @run main/othervm -Xcomp -XX:CompileOnly=Test8005033::testBitCount Test8005033
  29  * @author Richard Reingruber richard DOT reingruber AT sap DOT com
  30  */
  31 
  32 public class Test8005033 {
  33     public static int MINUS_ONE = -1;
  34 
  35     public static void main(String[] args) {
  36         System.out.println("EXECUTING test.");
  37         Integer.bitCount(1);   // load class
  38         int expectedBitCount = 0;
  39         int calculatedBitCount = testBitCount();
  40         if (expectedBitCount != calculatedBitCount) {
  41             throw new InternalError("got " + calculatedBitCount + " but expected " + expectedBitCount);
  42         }
  43         System.out.println("SUCCESSFULLY passed test.");
  44     }
  45 
  46     // testBitCount will be compiled using the Integer.bitCount() intrinsic if possible
  47     private static int testBitCount() {
  48         return Integer.bitCount(MINUS_ONE+1);   // -1 + 1 => int overflow
  49     }
  50 }