/* * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /* * @test * @summary Check code generation for value creation ops * @modules jdk.compiler/com.sun.tools.javac.util jdk.jdeps/com.sun.tools.javap * @compile ValueCreationTest.java * @run main/othervm -Xverify:none -XX:+EnableValhalla ValueCreationTest * @modules jdk.compiler */ import java.io.PrintWriter; import java.io.StringWriter; import java.nio.file.Paths; public class ValueCreationTest { __ByValue static final class Point { final int x; final int y; Point () { x = 10; y = 10; } static Point makePoint(int x, int y) { Point p = __MakeDefault Point(); p = __WithField(p.x, x); return __WithField(p.y, y); } public static void main(String [] args) { Point p = makePoint(10, 20); } } public static void main(String[] args) { new ValueCreationTest().run(); } void run() { String [] params = new String [] { "-v", Paths.get(System.getProperty("test.classes"), "ValueCreationTest$Point.class").toString() }; runCheck(params, new String [] { "0: defaultvalue #2 // class ValueCreationTest$Point", "3: astore_2", "4: aload_2", "5: iload_0", "6: withfield #3 // Field x:I", "9: astore_2", "10: aload_2", "11: iload_1", "12: withfield #4 // Field y:I", "15: areturn" }); } void runCheck(String [] params, String [] expectedOut) { StringWriter s; String out; try (PrintWriter pw = new PrintWriter(s = new StringWriter())) { com.sun.tools.javap.Main.run(params, pw); out = s.toString(); } int errors = 0; for (String eo: expectedOut) { if (!out.contains(eo)) { System.err.println("Match not found for string: " + eo); errors++; } } if (errors > 0) { throw new AssertionError("Unexpected javap output: " + out); } } }