jdk-24/test/hotspot/jtreg/compiler/ccp/TestRemoveUnreachableCCP.java
Emanuel Peter 379f3094db 8287217: C2: PhaseCCP: remove not visited nodes, prevent type inconsistency
Reviewed-by: roland, chagedorn, thartmann
2022-09-21 07:22:28 +00:00

49 lines
1.6 KiB
Java

/*
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* 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
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*
* 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.
*
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*/
/**
* @test
* @bug 8287217
* @summary CCP must remove nodes that are not traversed, else their type can be inconsistent
* @run main/othervm -Xcomp -XX:CompileCommand=compileonly,TestRemoveUnreachableCCP::test
* TestRemoveUnreachableCCP
*/
public class TestRemoveUnreachableCCP {
static void test() {
Byte x = 1;
for (int i = 0; i < 10000; i++) {
if ((i & 1) == 0) {
x = (byte)x;
}
}
}
public static void main(String[] strArr) {
for (int i = 0; i < 11; i++) {
test();
}
}
}