/* * 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 8314233 * @requires vm.compiler2.enabled * @summary Test that loop peeling does not treat unrelated Opaque4 node as Template Assertion Predicate. * @run main/othervm -Xbatch -XX:LoopMaxUnroll=0 * -XX:CompileCommand=compileonly,compiler.predicates.TestPeelingFindsUnrelatedOpaque4Node::* * -XX:CompileCommand=inline,*String::* compiler.predicates.TestPeelingFindsUnrelatedOpaque4Node */ package compiler.predicates; public class TestPeelingFindsUnrelatedOpaque4Node { static int iFld; static boolean flag; public static void main(String[] args) { for (int i = 0; i < 1000; i++) { test(); flag = !flag; } } static void test() { String s = flag ? "34323653" : "343423"; s.contains("343"); // Inlined and will call StringLatin1.indexOf intrinsics which emits Opaque4 node which will be wrongly // found as Template Assertion Predicate when trying to initialize them which triggers the assert. s.contains("3442"); for (int i = 0; i < 100; i++) { if (flag) { // Triggers peeling return; } iFld = 34; } } }