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1 /*
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2 * Copyright 2012 SAP AG. 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 8005033
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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.
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28 * @run main/othervm -Xcomp -XX:CompileOnly=Test8005033::testBitCount Test8005033
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29 * @author Richard Reingruber richard DOT reingruber AT sap DOT com
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30 */
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31
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32 public class Test8005033 {
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33 public static int MINUS_ONE = -1;
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34
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35 public static void main(String[] args) {
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36 System.out.println("EXECUTING test.");
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37 Integer.bitCount(1); // load class
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38 int expectedBitCount = 0;
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39 int calculatedBitCount = testBitCount();
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40 if (expectedBitCount != calculatedBitCount) {
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41 throw new InternalError("got " + calculatedBitCount + " but expected " + expectedBitCount);
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42 }
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43 System.out.println("SUCCESSFULLY passed test.");
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44 }
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45
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46 // testBitCount will be compiled using the Integer.bitCount() intrinsic if possible
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47 private static int testBitCount() {
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48 return Integer.bitCount(MINUS_ONE+1); // -1 + 1 => int overflow
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49 }
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50 }
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