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/*
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* Copyright 2012 SAP AG. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8005033
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* @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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* @run main/othervm -Xcomp -XX:CompileOnly=Test8005033::testBitCount Test8005033
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* @author Richard Reingruber richard DOT reingruber AT sap DOT com
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*/
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public class Test8005033 {
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public static int MINUS_ONE = -1;
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public static void main(String[] args) {
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System.out.println("EXECUTING test.");
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Integer.bitCount(1); // load class
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int expectedBitCount = 0;
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int calculatedBitCount = testBitCount();
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if (expectedBitCount != calculatedBitCount) {
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throw new InternalError("got " + calculatedBitCount + " but expected " + expectedBitCount);
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}
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System.out.println("SUCCESSFULLY passed test.");
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}
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// testBitCount will be compiled using the Integer.bitCount() intrinsic if possible
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private static int testBitCount() {
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return Integer.bitCount(MINUS_ONE+1); // -1 + 1 => int overflow
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}
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}
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