1 /* 2 * Copyright (c) 2021, Red Hat, Inc. All rights reserved. 3 * Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 */ 24 25 /** 26 * @test 27 * @bug 8260363 28 * @summary C2 compilation fails with assert(n->Opcode() != Op_Phi) failed: cannot match 29 * @enablePreview 30 * @modules java.base/jdk.internal.value 31 * java.base/jdk.internal.vm.annotation 32 * @run main/othervm -XX:-BackgroundCompilation TestFlatArrayAliasesCardMark 33 */ 34 35 import jdk.internal.value.ValueClass; 36 import jdk.internal.vm.annotation.ImplicitlyConstructible; 37 import jdk.internal.vm.annotation.LooselyConsistentValue; 38 import jdk.internal.vm.annotation.NullRestricted; 39 40 @ImplicitlyConstructible 41 @LooselyConsistentValue 42 value class Test0 { 43 int x = 42; 44 short[] array = new short[7]; 45 } 46 47 public class TestFlatArrayAliasesCardMark { 48 int f = 1; 49 50 public void method1(Test0[] array) { 51 for (int i = 0; i < 100; ++i) { 52 array[0] = array[0]; 53 for (int j = 0; j < 10; ++j) { 54 for (int k = 0; k < 10; ++k) { 55 f = 42; 56 } 57 } 58 } 59 } 60 61 public static void main(String[] args) { 62 TestFlatArrayAliasesCardMark t = new TestFlatArrayAliasesCardMark(); 63 Test0[] array = (Test0[])ValueClass.newNullRestrictedArray(Test0.class, 1); 64 array[0] = new Test0(); 65 66 for (int l1 = 0; l1 < 10_000; ++l1) { 67 t.method1(array); 68 } 69 } 70 }