55 lines
1.8 KiB
Java
55 lines
1.8 KiB
Java
/*
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* Copyright (c) 2018, Red Hat, Inc. 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 8214862
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* @summary Multiple passes of PhaseRemoveUseless causes infinite loop to be optimized out
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*
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* @run main/othervm -XX:-TieredCompilation -Xcomp -XX:CompileOnly=StringConcatInfiniteLoop::test -XX:CompileCommand=dontinline,*StringBuilder::* StringConcatInfiniteLoop
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*
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*/
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public class StringConcatInfiniteLoop {
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public static void main(String[] args) {
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StringBuilder sb = new StringBuilder();
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test(sb, "foo", "bar", true);
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}
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private static void test(Object v, String s1, String s2, boolean flag) {
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if (flag) {
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return;
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}
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int i = 0;
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for (; i < 10; i++);
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if (i == 10) {
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v = null;
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}
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StringBuilder sb = new StringBuilder(s1);
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sb.append(s2);
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while (v == null);
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}
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private static class A {
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}
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}
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