hotspot/test/compiler/6769124/TestDeoptInt6769124.java
author duke
Wed, 05 Jul 2017 17:50:24 +0200
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Merge
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/*
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 * Copyright (c) 2009, 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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/**
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 * @test
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 * @bug 6769124
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 * @summary int value might not be correctly decoded on deopt with c1 on 64 bit
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 *
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 * @run main/othervm -Xcomp -XX:CompileOnly=TestDeoptInt6769124.m TestDeoptInt6769124
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 */
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public class TestDeoptInt6769124 {
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    static class A {
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        volatile int vl;
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        A(int v) {
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            vl = v;
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        }
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    }
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    static void m(int b) {
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        A a = new A(10);
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        int c;
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        c = b + a.vl; //accessing volatile field of class not loaded at compile time forces a deopt
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        if(c != 20) {
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            System.out.println("a (= " + a.vl + ") + b (= " + b + ") = c (= " + c + ") != 20");
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            throw new InternalError();
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        }
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    }
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    public static void main(String[] args) {
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        m(10);
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    }
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}