| /* |
| * Copyright (c) 2008, 2018, 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 |
| * |
| * @summary converted from VM Testbase jit/deoptimization/test01. |
| * VM Testbase keywords: [jit, quick] |
| * |
| * @library /vmTestbase |
| * /test/lib |
| * @run driver jdk.test.lib.FileInstaller . . |
| * @build jit.deoptimization.test01.test01 |
| * @run driver ExecDriver --java jit.deoptimization.test01.test01 |
| */ |
| |
| package jit.deoptimization.test01; |
| |
| import nsk.share.TestFailure; |
| |
| /* |
| * Simple loop causes the optimizer to deoptimize |
| * foo methos when an instance of class B is created. |
| * |
| * run with the -XX:TraceDeoptimization to observ the result. |
| */ |
| |
| class test01 { |
| public static void main (String[] args) { |
| A obj = new A(); |
| for (int index = 0; index < 100; index++) { |
| obj.used_alot(); |
| } |
| } |
| } |
| |
| class A { |
| protected final int counter = 25000; |
| protected int count = 0; |
| public void foo(int index) { |
| count++; |
| if (index == counter - 1) { |
| try { |
| ((B)Class.forName("B").newInstance()).foo(index); |
| } |
| catch(Exception e) { |
| } |
| } |
| } |
| |
| public void used_alot() { |
| for (int index = 0; index < counter; index++) { |
| foo(index); |
| } |
| } |
| } |
| |
| class B extends A { |
| public void foo(int index) { |
| count--; |
| } |
| }; |