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/*
* 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 8341976
* @summary C2: use_mem_state != load->find_exact_control(load->in(0)) assert failure
* @run main/othervm -XX:-BackgroundCompilation TestSunkLoadAntiDependency
* @run main TestSunkLoadAntiDependency
*/
public class TestSunkLoadAntiDependency {
private static volatile int volatileField;
public static void main(String[] args) {
int[] array = new int[100];
for (int i = 0; i < 20_000; i++) {
test1(array, 2);
inlined1(array, 100, 0, 100, array);
}
}
private static int test1(int[] src, int length) {
length = Integer.max(1, length);
int[] dst = new int[2];
int stop;
for (stop = 0; stop < 10; stop++) {
for (int i = 0; i < 10; i++) {
}
}
int start;
for (start = 0; start < 9; start++) {
for (int i = 0; i < 10; i++) {
}
}
inlined1(src, length, start, stop, dst);
return dst[0] + dst[1];
}
private static void inlined1(int[] src, int length, int start, int stop, int[] dst) {
for (int i = start; i < stop; i++) {
volatileField = 42;
System.arraycopy(src, 0, dst, 0, length);
}
}
}
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