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8347040: C2: assert(!loop->_body.contains(in)) failed

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Reviewed-by: chagedorn, kvn
This commit is contained in:
Roland Westrelin 2025-02-27 16:47:31 +00:00
parent 8323ddfe18
commit 939815fdcf
2 changed files with 57 additions and 2 deletions
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4
src/hotspot/share/opto/loopnode.cpp
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@ -3194,10 +3194,10 @@ void OuterStripMinedLoopNode::transform_to_counted_loop(PhaseIterGVN* igvn, Phas
if (iloop->get_loop(iloop->get_ctrl(in)) != outer_loop_ilt) {
continue;
}
assert(!loop->_body.contains(in), "");
loop->_body.push(in);
wq.push(in);
}
assert(!loop->_body.contains(n), "Shouldn't append node to body twice");
loop->_body.push(n);
}
iloop->set_loop(safepoint, loop);
loop->_body.push(safepoint);

55
test/hotspot/jtreg/compiler/longcountedloops/TestAssertWhenOuterStripMinedLoopRemoved.java Normal file
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@ -0,0 +1,55 @@
/*
* Copyright (c) 2025, Red Hat, Inc. 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.
*/
/*
* @test
* @bug 8347040
* @summary C2: assert(!loop->_body.contains(in)) failed
* @run main/othervm -XX:-BackgroundCompilation TestAssertWhenOuterStripMinedLoopRemoved
*/
import static java.lang.foreign.ValueLayout.JAVA_LONG;
import java.lang.foreign.Arena;
import java.lang.foreign.MemorySegment;
public class TestAssertWhenOuterStripMinedLoopRemoved {
static final int COUNT = 100000;
static final MemorySegment segment = Arena.global().allocate(JAVA_LONG, COUNT);
public static void main(String[] args) {
for (int i = 0; i < 10000; i++) {
test();
}
}
static void test() {
var i = 0;
var j = 0;
while (i < 100000) {
segment.setAtIndex(JAVA_LONG, i++, 0);
segment.setAtIndex(JAVA_LONG, j++, 0);
}
}
}