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.
22 */
23
24 /*
25 * @test
26 * @bug 8027751
27 * @requires vm.gc.G1
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 */
36
37 import java.util.concurrent.atomic.*;
38
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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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.
22 */
23
24 /*
25 * @test
26 * @bug 8027751
27 * @summary C1 crashes generating G1 post-barrier in Unsafe.getAndSetObject() intrinsic because of the new value spill
28 * @requires vm.gc.G1
29 *
30 * @run main/othervm -XX:+UseG1GC compiler.regalloc.C1ObjectSpillInLogicOp
31 */
32
33 package compiler.regalloc;
34
35 import java.util.concurrent.atomic.AtomicReferenceArray;
36
37 /*
38 * G1 barriers use logical operators (xor) on T_OBJECT mixed with T_LONG or T_INT.
39 * The current implementation of logical operations on x86 in C1 doesn't allow for long operands to be on stack.
40 * There is a special code in the register allocator that forces long arguments in registers on x86. However T_OBJECT
41 * can be spilled just fine, and in that case the xor emission will fail.
42 */
43 public class C1ObjectSpillInLogicOp {
44 public static void main(String[] args) {
45 AtomicReferenceArray<Integer> x = new AtomicReferenceArray(128);
46 Integer y = new Integer(0);
47 for (int i = 0; i < 50000; i++) {
48 x.getAndSet(i % x.length(), y);
49 }
50 }
51 }
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