58 lines
2.1 KiB
Java
58 lines
2.1 KiB
Java
/*
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* Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @key stress randomness
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* @bug 8298520
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* @requires vm.compiler2.enabled
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* @summary Dying subgraph confuses logic that tries to find the OpaqueZeroTripGuard.
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* @run main/othervm -Xcomp -XX:CompileCommand=compileonly,compiler.loopopts.TestUnexpectedOpaque1::* -XX:-TieredCompilation
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* -XX:+UnlockDiagnosticVMOptions -XX:+StressIGVN -XX:StressSeed=1642564308 compiler.loopopts.TestUnexpectedOpaque1
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* @run main/othervm -Xcomp -XX:CompileCommand=compileonly,compiler.loopopts.TestUnexpectedOpaque1::* -XX:-TieredCompilation
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* -XX:+UnlockDiagnosticVMOptions -XX:+StressIGVN compiler.loopopts.TestUnexpectedOpaque1
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*/
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package compiler.loopopts;
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public class TestUnexpectedOpaque1 {
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static int cnt = 0;
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static int test() {
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int res = 42;
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for (int i = 500; i > 0; --i) {
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res |= 1;
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if (res != 0) {
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return 43;
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}
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cnt++;
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}
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return Float.floatToIntBits(44F);
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}
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public static void main(String[] args) {
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test();
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}
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}
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