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8307131: C2: assert(false) failed: malformed control flow

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Reviewed-by: kvn, chagedorn, thartmann
(cherry picked from commit d2b3eef0f2)
This commit is contained in:
Roland Westrelin
2023-05-09 09:54:22 +00:00
committed by Vitaly Provodin
parent 3350208342
commit 832e0936a4
2 changed files with 58 additions and 1 deletions
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3
src/hotspot/share/opto/loopnode.cpp
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@@ -2014,7 +2014,8 @@ bool PhaseIdealLoop::is_counted_loop(Node* x, IdealLoopTree*&loop, BasicType iv_
bool strip_mine_loop = iv_bt == T_INT &&
loop->_child == nullptr &&
sfpt != nullptr &&
!loop->_has_call;
!loop->_has_call &&
is_deleteable_safept(sfpt);
IdealLoopTree* outer_ilt = nullptr;
if (strip_mine_loop) {
outer_ilt = create_outer_strip_mined_loop(test, cmp, init_control, loop,

56
test/hotspot/jtreg/compiler/loopstripmining/TestNondeleteableSafePoint.java Normal file
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@@ -0,0 +1,56 @@
/*
* Copyright (c) 2023, 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 8307131
* @summary C2: assert(false) failed: malformed control flow
* @library /test/lib
* @run main/othervm -Xcomp -XX:CompileOnly=TestNondeleteableSafePoint -XX:-TieredCompilation TestNondeleteableSafePoint
*/
import jdk.test.lib.Utils;
public class TestNondeleteableSafePoint {
static int N;
public static void main(String[] strArr) throws Exception {
Thread thread = new Thread() {
public void run() {
test();
}
};
// Give thread some time to trigger compilation
thread.setDaemon(true);
thread.start();
Thread.sleep(Utils.adjustTimeout(500));
}
static void test() {
int i19, i21, iArr1[] = new int[N];
while (true) {
for (i19 = i21 = 2; i21 > i19; --i21) {
}
}
}
}