91 lines
2.7 KiB
Java
91 lines
2.7 KiB
Java
/*
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* Copyright (c) 2022, 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
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* @bug 8290711
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* @summary assert(false) failed: infinite loop in PhaseIterGVN::optimize
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* @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:-TieredCompilation TestInfiniteIGVNAfterCCP
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*/
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import java.util.function.BooleanSupplier;
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public class TestInfiniteIGVNAfterCCP {
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private static int inc;
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private static volatile boolean barrier;
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static class A {
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int field1;
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int field2;
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}
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public static void main(String[] args) {
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A a = new A();
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for (int i = 0; i < 20_000; i++) {
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test(false, a, false);
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inc = 0;
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testHelper(true, () -> inc < 10, a, 4, true);
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inc = 0;
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testHelper(true, () -> inc < 10, a, 4, false);
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testHelper(false, () -> inc < 10, a, 42, false);
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}
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}
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private static void test(boolean flag2, A a, boolean flag1) {
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int i = 2;
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for (; i < 4; i *= 2);
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testHelper(flag2, () -> true, a, i, flag1);
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}
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private static void testHelper(boolean flag2, BooleanSupplier f, A a, int i, boolean flag1) {
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if (i == 4) {
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if (a == null) {
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}
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} else {
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a = null;
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}
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if (flag2) {
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while (true) {
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synchronized (new Object()) {
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}
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if (!f.getAsBoolean()) {
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break;
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}
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if (flag1) {
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if (a == null) {
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}
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}
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barrier = true;
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inc++;
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if (inc % 2 == 0) {
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a.field1++;
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}
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}
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}
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}
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}
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