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8326638: Crash in PhaseIdealLoop::remix_address_expressions due to un…
…expected Region instead of Loop Backport-of: 9f0e7da64e21237322e55ca4f0e3639fa5d1c4ed
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Andrew Lu
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Mar 7, 2024
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test/hotspot/jtreg/compiler/loopopts/TestRemixAddressExpressionsWithIrreducibleLoop.java
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/* | ||
* Copyright (c) 2024, 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. | ||
* | ||
*/ | ||
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/* | ||
* @test | ||
* @bug 8326638 | ||
* @summary Test handling of irreducible loops in PhaseIdealLoop::remix_address_expressions. | ||
* @run main/othervm -XX:-TieredCompilation -Xbatch | ||
* -XX:CompileCommand=compileonly,TestRemixAddressExpressionsWithIrreducibleLoop::test | ||
* TestRemixAddressExpressionsWithIrreducibleLoop | ||
*/ | ||
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public class TestRemixAddressExpressionsWithIrreducibleLoop { | ||
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public static void main(String[] args) { | ||
test("4"); | ||
} | ||
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public static void test(String arg) { | ||
for (int i = 0; i < 100_000; ++i) { | ||
int j = 0; | ||
while (true) { | ||
boolean tmp = "1\ufff0".startsWith(arg, 2 - arg.length()); | ||
if (j++ > 100) | ||
break; | ||
} | ||
loop: | ||
while (i >= 100) { | ||
for (int i2 = 0; i2 < 1; i2 = 1) | ||
if (j > 300) | ||
break loop; | ||
j++; | ||
} | ||
} | ||
} | ||
} |
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