/*

 * Copyright (c) 2013, 2016, 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 8027751

 * @requires vm.gc.G1

 *

 * @run main/othervm -XX:+UseG1GC compiler.regalloc.C1ObjectSpillInLogicOp

 */

package compiler.regalloc;

import java.util.concurrent.atomic.AtomicReferenceArray;

/*

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

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

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

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

 */

public class C1ObjectSpillInLogicOp {

    public static void main(String[] args) {

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

        Integer y = new Integer(0);

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

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

        }

    }

}