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e6546683a8
Co-authored-by: Emanuel Peter <epeter@openjdk.org> Co-authored-by: Roberto Castañeda Lozano <rcastanedalo@openjdk.org> Reviewed-by: epeter, rcastanedalo
68 lines
2.3 KiB
Java
68 lines
2.3 KiB
Java
/*
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* Copyright (c) 2025, 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 8327963
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* @summary C2: fix construction of memory graph around Initialize node to prevent incorrect execution if allocation is removed
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* @run main/othervm -XX:-BackgroundCompilation compiler.macronodes.TestEarlyEliminationOfAllocationWithoutUse
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* @run main/othervm compiler.macronodes.TestEarlyEliminationOfAllocationWithoutUse
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*/
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package compiler.macronodes;
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import java.util.Arrays;
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public class TestEarlyEliminationOfAllocationWithoutUse {
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private static volatile int volatileField;
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public static void main(String[] args) {
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boolean[] allTrue = new boolean[3];
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Arrays.fill(allTrue, true);
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A a = new A();
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boolean[] allFalse = new boolean[3];
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for (int i = 0; i < 20_000; i++) {
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a.field1 = 0;
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test1(a, allTrue);
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test1(a, allFalse);
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if (a.field1 != 42) {
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throw new RuntimeException("Lost Store");
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}
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}
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}
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private static void test1(A otherA, boolean[] flags) {
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otherA.field1 = 42;
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// Fully unrolled before EA
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for (int i = 0; i < 3; i++) {
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A a = new A(); // removed right after EA
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if (flags[i]) {
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break;
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}
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}
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}
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private static class A {
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int field1;
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}
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}
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