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/*
* Copyright (c) 2025, 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.
*/
/**
* @test
* @bug 8335708
* @summary Crash Compile::verify_graph_edges with dead code check when safepoints are reachable but not connected back to Root's inputs
* @library /test/lib
*
* @run driver compiler.loopopts.VerifyGraphEdgesWithDeadCodeCheckFromSafepoints
* @run main/othervm
* -XX:+IgnoreUnrecognizedVMOptions -XX:+UnlockDiagnosticVMOptions
* -XX:-TieredCompilation -XX:+VerifyGraphEdges
* -XX:+StressIGVN -Xcomp
* -XX:CompileCommand=compileonly,compiler.loopopts.VerifyGraphEdgesWithDeadCodeCheckFromSafepoints::mainTest
* compiler.loopopts.VerifyGraphEdgesWithDeadCodeCheckFromSafepoints
*
*/
package compiler.loopopts;
import jdk.test.lib.Utils;
public class VerifyGraphEdgesWithDeadCodeCheckFromSafepoints {
public static void main(String[] args) throws Exception {
Thread thread = new Thread() {
public void run() {
VerifyGraphEdgesWithDeadCodeCheckFromSafepoints instance = new VerifyGraphEdgesWithDeadCodeCheckFromSafepoints();
byte[] a = new byte[997];
for (int i = 0; i < 100; ++i) {
instance.mainTest(a, a);
}
}
};
// Give thread some time to trigger compilation
thread.setDaemon(true);
thread.start();
Thread.sleep(Utils.adjustTimeout(500));
}
public void mainTest(byte[] a, byte[] b) {
int i = 0;
while (i < (a.length - 4)) {
a[i] = b[i];
}
while (true) {
a[i] = b[i];
}
}
}
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