75 lines
2.3 KiB
Java
75 lines
2.3 KiB
Java
/*
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* Copyright (c) 2020, 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 8244086
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* @summary Following 8241492, strip mined loop may run extra iterations
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* @requires vm.compiler2.enabled
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*
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* @run main/othervm -XX:-BackgroundCompilation -XX:LoopUnrollLimit=0 -XX:-TieredCompilation TestStripMinedLimitBelowInit
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*
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*/
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public class TestStripMinedLimitBelowInit {
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public static void main(String[] args) {
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for (int i = 0; i < 20_000; i++) {
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test1(0, 1000);
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test2(1000, 0);
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}
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int sum = test1(1000, 0);
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if (sum != 1000) {
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throw new RuntimeException("wrong result: " + sum);
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}
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sum = test2(0, 1000);
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if (sum != 0) {
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throw new RuntimeException("wrong result: " + sum);
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}
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}
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private static int test1(int start, int stop) {
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int sum = 0;
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int i = start;
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do {
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// So ciTypeFlow doesn't clone the loop head
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synchronized (new Object()) {
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}
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sum += i;
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i++;
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} while (i < stop);
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return sum;
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}
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private static int test2(int start, int stop) {
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int sum = 0;
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int i = start;
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do {
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synchronized (new Object()) {
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}
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sum += i;
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i--;
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} while (i >= stop);
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return sum;
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}
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}
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