/* * Copyright (c) 2025, 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 8367483 * @summary Missed worklist notification during IGVN for CastX2P(SubX(x, y)) pattern, * leads to missed optimization. * @run main/othervm * -XX:CompileCommand=compileonly,compiler.igvn.MissedOptimizationWithCastX2PSubX::test * -XX:-TieredCompilation * -XX:+IgnoreUnrecognizedVMOptions * -XX:VerifyIterativeGVN=1110 * compiler.igvn.MissedOptimizationWithCastX2PSubX * @run main compiler.igvn.MissedOptimizationWithCastX2PSubX */ package compiler.igvn; import java.lang.foreign.*; public class MissedOptimizationWithCastX2PSubX { public static void main(String[] args) { MemorySegment a = Arena.ofAuto().allocate(74660); MemorySegment b = Arena.ofAuto().allocate(74660); for (int i = 0; i < 1_000; i++) { test(a, 69830/2 - 100, b, -10_000, 0, 1_000); } } public static void test(MemorySegment a, long invarA, MemorySegment b, long invarB, long ivLo, long ivHi) { for (long i = ivHi-1; i >= ivLo; i-=1) { a.set(ValueLayout.JAVA_CHAR_UNALIGNED, 69830L + 2L * i + -2L * invarA, (char)42); b.set(ValueLayout.JAVA_FLOAT_UNALIGNED, 9071L + -4L * i + -4L * invarB, 42); } } }