test/hotspot/jtreg/compiler/c2/Test7199742.java
author shade
Fri, 08 Jun 2018 11:41:43 +0200
changeset 50463 929cd9246fc9
parent 50407 3dfdcca00ecc
permissions -rw-r--r--
8204479: Bitwise AND on byte value sometimes produces wrong result Reviewed-by: kvn, thartmann
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/*
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 * Copyright (c) 2012, Oracle and/or its affiliates. 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 7199742
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 * @summary A lot of C2 OSR compilations of the same method's bci
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 *
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 * @run main/othervm -Xmx128m -Xbatch compiler.c2.Test7199742
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 */
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package compiler.c2;
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public class Test7199742 {
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    private static final int ITERS = 10000000;
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    public static void main(String args[]) {
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        Test7199742 t = new Test7199742();
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        for (int i = 0; i < 10; i++) {
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            test(t, 7);
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        }
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    }
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    static Test7199742 test(Test7199742 t, int m) {
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        int i = -(ITERS / 2);
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        if (i == 0) return null;
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        Test7199742 v = null;
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        while (i < ITERS) {
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            if ((i & m) == 0) {
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                v = t;
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            }
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            i++;
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        }
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        return v;
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    }
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}