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8260608: add a regression test for 8260370
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test/hotspot/jtreg/compiler/loopopts/TestLoopLimitNodeElimination.java
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/* | ||
* Copyright (c) 2021, 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 8260370 | ||
* @summary C2: LoopLimit node is not eliminated | ||
* | ||
* @run main/othervm | ||
* -Xcomp | ||
* -XX:CompileOnly=compiler/loopopts/TestLoopLimitNodeElimination | ||
* compiler.loopopts.TestLoopLimitNodeElimination | ||
*/ | ||
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package compiler.loopopts; | ||
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public class TestLoopLimitNodeElimination { | ||
int a = 400; | ||
static int counter = 0; | ||
long b[] = new long[a]; | ||
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void c(String[] d) { | ||
int e = 0, f, g, h, i[] = new int[a]; | ||
long j; | ||
f = 2; | ||
b[f] = e; | ||
b = b; | ||
for (j = 301; j > 2; j -= 2) { | ||
g = 1; | ||
do { | ||
for (h = (int) j; h < 1; h++) { | ||
} | ||
} while (++g < 4); | ||
} | ||
counter++; | ||
if (counter == 100000) { | ||
throw new RuntimeException("expected"); | ||
} | ||
} | ||
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public static void main(String[] k) { | ||
try { | ||
TestLoopLimitNodeElimination l = new TestLoopLimitNodeElimination(); | ||
for (;;) { | ||
l.c(k); | ||
} | ||
} catch (RuntimeException ex) { | ||
// Expected | ||
} | ||
} | ||
} | ||
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