/* * Copyright (c) 2023, 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 * @bug 8298118 * @summary Test that the JVM doesn't fail due to split-if causing empty loop to temporarily have more than one phi * * @run main/othervm -Xcomp -XX:CompileCommand=compileonly,compiler.loopopts.TestEmptyLoopMultiplePhis::test * compiler.loopopts.TestEmptyLoopMultiplePhis */ package compiler.loopopts; public class TestEmptyLoopMultiplePhis { static int[] iArrFld = new int[10]; static int x; static void test(int a) { int i; for (int j = 6; j < 129; ++j) { a >>= 37388; a += 1001; } a >>>= -8; for (i = 0; i < 8; ++i) { iArrFld[i] = i; } for (int j = i; j < 7; ) { x = a; } } public static void main(String[] strArr) { test(2); } }