Java example source code file (Test5057225.java)

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Java - Java tags/keywords

byte_masks, exception, int_masks, internalerror, mask, net, network, runnable, short_masks, test5057225, throwable, urlclassloader

The Test5057225.java Java example source code

/*
 * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * 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).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/**
 * @test
 * @bug 5057225
 * @summary Remove useless I2L conversions
 *
 * @run main/othervm -Xcomp -XX:CompileOnly=Test5057225.doload Test5057225
 */

import java.net.URLClassLoader;

public class Test5057225 {
    static byte[]  ba = new byte[]  { -1 };
    static short[] sa = new short[] { -1 };
    static int[]   ia = new int[]   { -1 };

    static final long[] BYTE_MASKS = {
         0x0FL,
         0x7FL,  // 7-bit
         0xFFL,
    };

    static final long[] SHORT_MASKS = {
        0x000FL,
        0x007FL,  // 7-bit
        0x00FFL,
        0x0FFFL,
        0x3FFFL,  // 14-bit
        0x7FFFL,  // 15-bit
        0xFFFFL,
    };

    static final long[] INT_MASKS = {
        0x0000000FL,
        0x0000007FL,  // 7-bit
        0x000000FFL,
        0x00000FFFL,
        0x00003FFFL,  // 14-bit
        0x00007FFFL,  // 15-bit
        0x0000FFFFL,
        0x00FFFFFFL,
        0x7FFFFFFFL,  // 31-bit
        0xFFFFFFFFL,
    };

    public static void main(String[] args) throws Exception {
        for (int i = 0; i < BYTE_MASKS.length; i++) {
            System.setProperty("value", "" + BYTE_MASKS[i]);
            loadAndRunClass("Test5057225$loadUB2L");
        }

        for (int i = 0; i < SHORT_MASKS.length; i++) {
            System.setProperty("value", "" + SHORT_MASKS[i]);
            loadAndRunClass("Test5057225$loadUS2L");
        }

        for (int i = 0; i < INT_MASKS.length; i++) {
            System.setProperty("value", "" + INT_MASKS[i]);
            loadAndRunClass("Test5057225$loadUI2L");
        }
    }

    static void check(long result, long expected) {
        if (result != expected)
            throw new InternalError(result + " != " + expected);
    }

    static void loadAndRunClass(String classname) throws Exception {
        Class cl = Class.forName(classname);
        URLClassLoader apploader = (URLClassLoader) cl.getClassLoader();
        ClassLoader loader = new URLClassLoader(apploader.getURLs(), apploader.getParent());
        Class c = loader.loadClass(classname);
        Runnable r = (Runnable) c.newInstance();
        r.run();
    }

    public static class loadUB2L implements Runnable {
        static final long MASK;
        static {
            long value = 0;
            try {
                value = Long.decode(System.getProperty("value"));
            } catch (Throwable e) {}
            MASK = value;
        }

        public void run() { check(doload(ba), MASK); }
        static long doload(byte[] ba) { return ba[0] & MASK; }
    }

    public static class loadUS2L implements Runnable {
        static final long MASK;
        static {
            long value = 0;
            try {
                value = Long.decode(System.getProperty("value"));
            } catch (Throwable e) {}
            MASK = value;
        }

        public void run() { check(doload(sa), MASK); }
        static long doload(short[] sa) { return sa[0] & MASK; }
    }

    public static class loadUI2L implements Runnable {
        static final long MASK;
        static {
            long value = 0;
            try {
                value = Long.decode(System.getProperty("value"));
            } catch (Throwable e) {}
            MASK = value;
        }

        public void run() { check(doload(ia), MASK); }
        static long doload(int[] ia) { return ia[0] & MASK; }
    }
}