NullCheckTest.java revision 2617
* Copyright (c) 2011, 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 * @summary C1 NullCheckEliminator yields incorrect exceptions * @run main/othervm -XX:CompileOnly=NullCheckTest.test,NullCheckTest.inlined -Xcomp NullCheckTest // This cast is intended to fail. static class B
extends A {
// Inlined call must do a null check on a1. // However, the exlipcit NullCheck instruction is eliminated and // the null check is folded into the field load below, so the // exception in the inlined method is thrown before the null check // and the NullPointerException is not thrown.