/* * Copyright (c) 2021, 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. */ package compiler.exceptions; /** * @test * @key stress randomness * @bug 8263227 * @summary Tests that users of return values from exception-throwing method * calls are not duplicated in the call's exception path. The second * run with a variable seed is added for test robustness. * @library /test/lib / * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions * -XX:+UnlockDiagnosticVMOptions * -Xbatch -XX:+StressGCM -XX:StressSeed=0 * -XX:+VerifyRegisterAllocator * -XX:CompileCommand=dontinline,java.lang.Integer::* * compiler.exceptions.TestSpilling * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions * -XX:+UnlockDiagnosticVMOptions * -Xbatch -XX:+StressGCM * -XX:+VerifyRegisterAllocator * -XX:CompileCommand=dontinline,java.lang.Integer::* * compiler.exceptions.TestSpilling */ public class TestSpilling { public static void test() { int a = Integer.valueOf(42).intValue(); // After global code motion, the logic below should only be placed in // the fall-through path of java.lang.Integer::intValue(). Otherwise, // live range splitting might create uses without reaching definitions // if 'a' is spilled. int b = (((a & 0x0000F000)) + 1); int c = a / b + ((a % b > 0) ? 1 : 0); } public static void main(String[] args) { for (int i = 0; i < 10_000; i++) { test(); } } }