/* * Copyright (c) 2014, 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 * @modules java.base/jdk.internal.misc * @library /test/lib * * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:+EliminateAutoBox * -XX:CompileOnly=::valueOf,::byteValue,::shortValue,::testUnsignedByte,::testUnsignedShort * compiler.eliminateAutobox.UnsignedLoads */ package compiler.eliminateAutobox; import static jdk.test.lib.Asserts.assertEQ; public class UnsignedLoads { public static int testUnsignedByte() { byte[] bytes = new byte[] {-1}; int res = 0; for (int i = 0; i < 100000; i++) { for (Byte b : bytes) { res = b & 0xff; } } return res; } public static int testUnsignedShort() { int res = 0; short[] shorts = new short[] {-1}; for (int i = 0; i < 100000; i++) { for (Short s : shorts) { res = s & 0xffff; } } return res; } public static void main(String[] args) { assertEQ(testUnsignedByte(), 255); assertEQ(testUnsignedShort(), 65535); System.out.println("TEST PASSED"); } }