jdk8-mips64-public/hotspot: test/compiler/types/TestSpeculationFailedHigherEqual.java@8f28240318a2

8032633: Enable type speculation by default
Summary: enable type speculation
Reviewed-by: kvn

     1 /*

     2  * Copyright (c) 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.

    22  */

    24 /*

    25  * @test

    26  * @bug 8027422

    27  * @summary type methods shouldn't always operate on speculative part

    28  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:TypeProfileLevel=222 -XX:+UseTypeSpeculation -XX:-BackgroundCompilation TestSpeculationFailedHigherEqual

    29  *

    30  */

    32 public class TestSpeculationFailedHigherEqual {

    34     static class A {

    35         void m() {}

    36         int i;

    37     }

    39     static class C extends A {

    40     }

    42     static C c;

    44     static A m1(A a, boolean cond) {

    45         // speculative type for a is C not null

    46         if (cond ) {

    47             a = c;

    48         }

    49         // speculative type for a is C (may be null)

    50         int i = a.i;

    51         return a;

    52     }

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

    55         C c = new C();

    56         TestSpeculationFailedHigherEqual.c = c;

    57         for (int i = 0; i < 20000; i++) {

    58             m1(c, i%2 == 0);

    59         }

    61         System.out.println("TEST PASSED");

    62     }

    63 }

Mercurial > jdk8-mips64-public > hotspot / file revision

test/compiler/types/TestSpeculationFailedHigherEqual.java@8f28240318a2

test/compiler/types/TestSpeculationFailedHigherEqual.java