russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
53 lines
1.8 KiB
Java
53 lines
1.8 KiB
Java
/*
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* Copyright (c) 2025, Oracle and/or its affiliates. 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 8353345
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* @summary During the transformation (X << con1) << con2 ==> X << (con1 + con2) in IGVN,
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* we modified the inner shift, during the transformation of the outer shift without
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* removing it from the hashtable
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*
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* @run main/othervm -XX:CompileCommand=compileonly,*DoubleLShiftCrashDuringIGVN*::* -Xcomp DoubleLShiftCrashDuringIGVN
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*/
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public class DoubleLShiftCrashDuringIGVN {
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public static long shift = 0;
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public static int test() {
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int s = 1;
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shift = 12;
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for (int i = 0; i < 4; i++) {
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for (int j = 0; j < 4; j++) {
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s <<= shift;
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}
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shift = 33;
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}
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return s;
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}
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public static void main(String[] strArr) {
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test();
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}
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}
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