| /* |
| * Copyright (c) 2014, 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 8027422 |
| * @summary type methods shouldn't always operate on speculative part |
| * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:TypeProfileLevel=222 -XX:+UnlockExperimentalVMOptions -XX:+UseTypeSpeculation -XX:-BackgroundCompilation TestSpeculationFailedHigherEqual |
| * |
| */ |
| |
| public class TestSpeculationFailedHigherEqual { |
| |
| static class A { |
| void m() {} |
| int i; |
| } |
| |
| static class C extends A { |
| } |
| |
| static C c; |
| |
| static A m1(A a, boolean cond) { |
| // speculative type for a is C not null |
| if (cond ) { |
| a = c; |
| } |
| // speculative type for a is C (may be null) |
| int i = a.i; |
| return a; |
| } |
| |
| static public void main(String[] args) { |
| C c = new C(); |
| TestSpeculationFailedHigherEqual.c = c; |
| for (int i = 0; i < 20000; i++) { |
| m1(c, i%2 == 0); |
| } |
| |
| System.out.println("TEST PASSED"); |
| } |
| } |