| /* |
| * Copyright (c) 2017, Red Hat, Inc. 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 8174164 |
| * @summary SafePointNode::_replaced_nodes breaks with irreducible loops |
| * @run main/othervm -XX:-BackgroundCompilation TestReplacedNodesOSR |
| * |
| */ |
| |
| public class TestReplacedNodesOSR { |
| |
| static Object dummy; |
| |
| static interface I { |
| } |
| |
| static class A implements I { |
| } |
| |
| static final class MyException extends Exception { |
| } |
| |
| static final A obj = new A(); |
| static I static_field() { return obj; } |
| |
| // When OSR compiled, this method has an irreducible loop |
| static void test(int v, MyException e) { |
| int i = 0; |
| for (;;) { |
| if (i == 1000) { |
| break; |
| } |
| try { |
| if ((i%2) == 0) { |
| int j = 0; |
| for (;;) { |
| j++; |
| if (i+j != v) { |
| if (j == 1000) { |
| break; |
| } |
| } else { |
| A a = (A)static_field(); |
| // replaced node recorded here |
| throw e; |
| } |
| } |
| } |
| } catch(MyException ex) { |
| } |
| i++; |
| // replaced node applied on return of the method |
| // replaced node used here |
| dummy = static_field(); |
| } |
| } |
| |
| |
| static public void main(String[] args) { |
| for (int i = 0; i < 1000; i++) { |
| test(1100, new MyException()); |
| } |
| } |
| } |