test/hotspot/jtreg/compiler/integerArithmetic/TestNegAnd.java

/*
 * Copyright (c) 2021, Red Hat, Inc. All rights reserved.
 * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
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 *
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/**
 * @test
 * @key randomness
 * @bug 8274060
 * @summary Test broken transformation (-a) & (-b) = a & b does not happen
 *
 * @library /test/lib
 *
 * @run main/othervm -XX:-TieredCompilation -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:CompileCommand=dontinline,TestNegAnd::test* TestNegAnd
 *
 */

import java.util.Random;
import jdk.test.lib.Utils;
import jdk.test.lib.Asserts;

public class TestNegAnd {
    private static final Random random = Utils.getRandomInstance();
    // Enough cycles to ensure test methods are JIT-ed
    private static final int TEST_COUNT = 20_000;

    private static int testInt(int a, int b) {
        return (-a) & (-b);
    }
    private static long testLong(long a, long b) {
        return (-a) & (-b);
    }

    private static void runIntTests() {
        for (int index = 0; index < TEST_COUNT; index ++) {
            int a = random.nextInt();
            int b = random.nextInt();
            int expected = (-a) & (-b);
            int res = testInt(a, b);
            Asserts.assertEQ(res, expected);
        }
    }

    private static void runLongTests() {
        for (int index = 0; index < TEST_COUNT; index ++) {
            long a = random.nextLong();
            long b = random.nextLong();
            long expected = (-a) & (-b);
            long res = testLong(a, b);
            Asserts.assertEQ(res, expected);
        }
    }

    public static void main(String[] args) {
        runIntTests();
        runLongTests();
    }
}