e7795851d2
Reviewed-by: lmesnik, dholmes
81 lines
2.6 KiB
Java
81 lines
2.6 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
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* @bug 8212673
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* @summary Node::eqv_uncast() shouldn't step over load barriers unconditionally
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* @library /test/lib /
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* @modules java.base/jdk.internal.misc
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*
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* @build jdk.test.whitebox.WhiteBox
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:-UseOnStackReplacement -XX:-TieredCompilation -XX:-BackgroundCompilation EqvUncastStepOverBarrier
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*/
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import jdk.test.whitebox.WhiteBox;
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import java.lang.reflect.Method;
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public class EqvUncastStepOverBarrier {
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static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
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private static Object field = new A();
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public static void main(String[] args) throws Exception {
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for (int i = 0; i < 20_000; i++) {
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test();
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test();
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test_helper(null, 0);
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}
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Method m = EqvUncastStepOverBarrier.class.getDeclaredMethod("test");
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WHITE_BOX.enqueueMethodForCompilation(m, 4);
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if (!WHITE_BOX.isMethodCompiled(m, false)) {
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throw new RuntimeException("Method compilation failed");
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}
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}
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private static Object test() {
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Object o = field;
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if (o == null) {}
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for (int i = 1; i < 100; i *= 2) {
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int j = 0;
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for (; j < 4; j++) ;
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o = test_helper(o, j);
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}
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return o;
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}
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private static Object test_helper(Object o, int j) {
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if (j == 4) {
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A a = (A) o;
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o = a;
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} else {
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o = new Object();
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}
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return o;
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}
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private static class A {
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}
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}
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