1 /* 2 * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 25 package compiler.valhalla.inlinetypes; 26 27 import jdk.test.lib.Asserts; 28 29 /* 30 * @test 31 * @summary Test value numbering behaves correctly with flat fields. 32 * @library /testlibrary /test/lib 33 * @enablePreview 34 * @modules java.base/jdk.internal.value 35 * java.base/jdk.internal.vm.annotation 36 * @run main/othervm -Xcomp -XX:TieredStopAtLevel=1 -ea 37 * -XX:CompileCommand=compileonly,compiler.valhalla.inlinetypes.TestC1ValueNumbering::* 38 * compiler.valhalla.inlinetypes.TestC1ValueNumbering 39 */ 40 41 import jdk.internal.vm.annotation.ImplicitlyConstructible; 42 import jdk.internal.vm.annotation.LooselyConsistentValue; 43 import jdk.internal.vm.annotation.NullRestricted; 44 45 public class TestC1ValueNumbering { 46 @ImplicitlyConstructible 47 @LooselyConsistentValue 48 static value class Point { 49 int x; 50 int y; 51 52 public Point() { 53 x = 0; 54 y = 0; 55 } 56 57 public Point(int x, int y) { 58 this.x = x; 59 this.y = y; 60 } 61 } 62 63 @NullRestricted 64 Point p; 65 66 // Notes on test 1: 67 // 1 - asserts are important create several basic blocks (asserts create branches) 68 // 2 - local variables x, y must be read in the same block as the putfield 69 static void test1() { 70 Point p = new Point(4,5); 71 TestC1ValueNumbering test = new TestC1ValueNumbering(); 72 assert test.p.x == 0; 73 assert test.p.y == 0; 74 test.p = p; 75 int x = test.p.x; 76 int y = test.p.y; 77 Asserts.assertEQ(x, 4, "Bad field value"); 78 Asserts.assertEQ(y, 5, "Bad field value"); 79 } 80 81 public static void main(String[] args) { 82 for (int i = 0; i < 10; i++) { 83 test1(); 84 } 85 } 86 }