/* * Copyright (C) 2021 THL A29 Limited, a Tencent company. 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 8268362 * @requires vm.compiler2.enabled & vm.debug * @summary C2 using negative array length as index, using a.length. * AllocateArrayNode::make_ideal_length create CastIINode to not negative range. * Apply transform in GraphKit::load_array_length will covert array load index type to top. * This cause assert in Parse::array_addressing, it expect index type is int. * @run main/othervm -XX:-PrintCompilation compiler.arraycopy.TestNegArrayLengthAsIndex1 */ package compiler.arraycopy; public class TestNegArrayLengthAsIndex1 { public static void main(String[] args) throws Exception { for (int i = 0; i < 10000; i++) { foo(); } } static int foo() { int minusOne = -1; int[] a = null; try { a = new int[minusOne]; } catch (NegativeArraySizeException e) { return 0; } return a[a.length - 1]; } }