jdk8-mips64-public/hotspot: test/compiler/regalloc/C1ObjectSpillInLogicOp.java@f967da7f0c3c

8062537: [TESTBUG] Conflicting GC combinations in hotspot tests
Reviewed-by: tschatzl, jwilhelm

     1 /*

     2  * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

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    24 /*

    25  * @test

    26  * @bug 8027751

    27  * @requires vm.gc=="G1" | vm.gc=="null"

    28  * @summary C1 crashes generating G1 post-barrier in Unsafe.getAndSetObject() intrinsic because of the new value spill

    29  * @run main/othervm -XX:+UseG1GC C1ObjectSpillInLogicOp

    30  *

    31  * G1 barriers use logical operators (xor) on T_OBJECT mixed with T_LONG or T_INT.

    32  * The current implementation of logical operations on x86 in C1 doesn't allow for long operands to be on stack.

    33  * There is a special code in the register allocator that forces long arguments in registers on x86. However T_OBJECT

    34  * can be spilled just fine, and in that case the xor emission will fail.

    35  */

    37 import java.util.concurrent.atomic.*;

    39 public class C1ObjectSpillInLogicOp {

    40   public static void main(String[] args) {

    41     AtomicReferenceArray<Integer> x = new AtomicReferenceArray(128);

    42     Integer y = new Integer(0);

    43     for (int i = 0; i < 50000; i++) {

    44       x.getAndSet(i % x.length(), y);

    45     }

    46   }

    47 }

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