/* * 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 8306042 * @summary CCP missed optimization opportunity. Due to missing notification through Casts. * @library /test/lib * @run main/othervm -Xcomp -XX:-TieredCompilation * -XX:CompileOnly=compiler.ccp.TestShiftCastAndNotification::test * compiler.ccp.TestShiftCastAndNotification */ package compiler.ccp; public class TestShiftCastAndNotification { static int N; static int iArrFld[] = new int[1]; static int test() { int x = 1; int sval = 4; long useless[] = new long[N]; for (double d1 = 63; d1 > 2; d1 -= 2) { for (double d2 = 3; 1 < d2; d2--) { x <<= sval; // The LShiftI } // CastII probably somewhere in the loop structure x &= 3; // The AndI for (int i = 1; i < 3; i++) { try { x = iArrFld[0]; sval = 0; } catch (ArithmeticException a_e) { } } } return x; } public static void main(String[] args) { test(); } }