1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 8027422 27 * @summary type methods shouldn't always operate on speculative part 28 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:TypeProfileLevel=222 -XX:+UseTypeSpeculation -XX:-BackgroundCompilation TestSpeculationFailedHigherEqual 29 * 30 */ 31 32 public class TestSpeculationFailedHigherEqual { 33 34 static class A { 35 void m() {} 36 int i; 37 } 38 39 static class C extends A { 40 } 41 42 static C c; 43 44 static A m1(A a, boolean cond) { 45 // speculative type for a is C not null 46 if (cond ) { 47 a = c; 48 } 49 // speculative type for a is C (may be null) 50 int i = a.i; 51 return a; 52 } 53 54 static public void main(String[] args) { 55 C c = new C(); 56 TestSpeculationFailedHigherEqual.c = c; 57 for (int i = 0; i < 20000; i++) { 58 m1(c, i%2 == 0); 59 } 60 61 System.out.println("TEST PASSED"); 62 } 63 }