1 /* 2 * Copyright (c) 2022, 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 * @test 26 * @summary Test scalarization in returns with unloaded return types. 27 * @library /test/lib /compiler/whitebox / 28 * @enablePreview 29 * @build jdk.test.whitebox.WhiteBox 30 * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox 31 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI 32 * -Xbatch -XX:CompileCommand=dontinline,*::test* 33 * TestUnloadedReturnTypes 34 */ 35 36 import java.lang.reflect.Method; 37 38 import jdk.test.whitebox.WhiteBox; 39 40 value class MyValue1 { 41 int x; 42 43 public MyValue1(int x) { 44 this.x = x; 45 } 46 } 47 48 class MyClass { 49 50 static MyValue1 test(boolean b) { 51 return b ? new MyValue1(42) : null; 52 } 53 } 54 55 public class TestUnloadedReturnTypes { 56 public static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); 57 58 static Object res = null; 59 60 public static void test(boolean b) { 61 res = MyClass.test(b); 62 } 63 64 public static void main(String[] args) throws Exception { 65 // C1 compile caller method 66 Method m = TestUnloadedReturnTypes.class.getMethod("test", boolean.class); 67 WHITE_BOX.enqueueMethodForCompilation(m, 3); 68 69 // Make sure the callee method is C2 compiled 70 for (int i = 0; i < 100_000; ++i) { 71 MyClass.test((i % 2) == 0); 72 } 73 74 test(true); 75 if (((MyValue1)res).x != 42) { 76 throw new RuntimeException("Test failed"); 77 } 78 79 test(false); 80 if (res != null) { 81 throw new RuntimeException("Test failed"); 82 } 83 } 84 }