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 * 29 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:TypeProfileLevel=222 30 * -XX:+UseTypeSpeculation -XX:-BackgroundCompilation 31 * compiler.types.TestSpeculationFailedHigherEqual 32 */ 33 34 package compiler.types; 35 36 public class TestSpeculationFailedHigherEqual { 37 38 static class A { 39 void m() {} 40 int i; 41 } 42 43 static class C extends A { 44 } 45 46 static C c; 47 48 static A m1(A a, boolean cond) { 49 // speculative type for a is C not null 50 if (cond ) { 51 a = c; 52 } 53 // speculative type for a is C (may be null) 54 int i = a.i; 55 return a; 56 } 57 58 static public void main(String[] args) { 59 C c = new C(); 60 TestSpeculationFailedHigherEqual.c = c; 61 for (int i = 0; i < 20000; i++) { 62 m1(c, i%2 == 0); 63 } 64 65 System.out.println("TEST PASSED"); 66 } 67 }