55 lines
2.0 KiB
Java
55 lines
2.0 KiB
Java
/*
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* Copyright (C) 2021 THL A29 Limited, a Tencent company. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8268362
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* @requires vm.compiler2.enabled & vm.debug
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* @summary C2 using negative array length as index, using a.length.
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* AllocateArrayNode::make_ideal_length create CastIINode to not negative range.
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* Apply transform in GraphKit::load_array_length will covert array load index type to top.
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* This cause assert in Parse::array_addressing, it expect index type is int.
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* @run main/othervm -XX:-PrintCompilation compiler.arraycopy.TestNegArrayLengthAsIndex1
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*/
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package compiler.arraycopy;
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public class TestNegArrayLengthAsIndex1 {
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public static void main(String[] args) throws Exception {
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for (int i = 0; i < 10000; i++) {
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foo();
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}
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}
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static int foo() {
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int minusOne = -1;
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int[] a = null;
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try {
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a = new int[minusOne];
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} catch (NegativeArraySizeException e) {
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return 0;
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}
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return a[a.length - 1];
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}
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}
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