/* * 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 8317723 * @library /test/lib * @summary Test that CountedLoopEndNodes and zero trip guard check If nodes are not treated as Runtime Predicates. * @run main/othervm -XX:-TieredCompilation -Xbatch * -XX:CompileCommand=compileonly,compiler.predicates.TestWrongRuntimePredicateDetection::test* * compiler.predicates.TestWrongRuntimePredicateDetection */ package compiler.predicates; public class TestWrongRuntimePredicateDetection { static int[] iArr = new int[50]; static long instanceCount; static boolean bFld = true; static volatile byte byFld; static long[][] lArrFld; public static void main(String[] x) { for (int i = 0; i < 1000; i++) { testCountedLoopEndAsRuntimePredicate(); } for (int i = 0; i < 10; i++) { testZeroTripGuardAsRuntimePredicate(); } } static void testCountedLoopEndAsRuntimePredicate() { int i22 = 7, i26, i28, i29 = 8, i31 = 1; float f4; do { for (int i = 0; i < 10000; i++) { if (bFld) { break; } instanceCount = byFld; } for (i26 = 4; 80 > i26; i26 += 2) ; } while (++i22 < 315); i28 = 6; while ((i28 -= 3) > 0) { for (f4 = i28; f4 < 53; f4++) { bFld = false; } instanceCount = i26; do { switch ((i26 >>> 1) % 2 * 5 + 6) { case 12: case 10: lArrFld[i31][1] = i29; } } while (++i31 < 53); } } static void testZeroTripGuardAsRuntimePredicate() { int m; int a[] = new int[50]; for (int j = 0; j < a.length; j++) { a[j] = j; } for (int j = 4; j < 42; j++) { for (int k = 1; k < 5; k++) { iArr[1] = 34; switch (j % 4) { case 0: iArr = iArr; case 1: case 3: m = 3; } } } } }