1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/test/compiler/types/TestSpeculationFailedHigherEqual.java Wed Apr 27 01:25:04 2016 +0800 1.3 @@ -0,0 +1,63 @@ 1.4 +/* 1.5 + * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 1.7 + * 1.8 + * This code is free software; you can redistribute it and/or modify it 1.9 + * under the terms of the GNU General Public License version 2 only, as 1.10 + * published by the Free Software Foundation. 1.11 + * 1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT 1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1.15 + * version 2 for more details (a copy is included in the LICENSE file that 1.16 + * accompanied this code). 1.17 + * 1.18 + * You should have received a copy of the GNU General Public License version 1.19 + * 2 along with this work; if not, write to the Free Software Foundation, 1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1.21 + * 1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 1.23 + * or visit www.oracle.com if you need additional information or have any 1.24 + * questions. 1.25 + */ 1.26 + 1.27 +/* 1.28 + * @test 1.29 + * @bug 8027422 1.30 + * @summary type methods shouldn't always operate on speculative part 1.31 + * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:TypeProfileLevel=222 -XX:+UseTypeSpeculation -XX:-BackgroundCompilation TestSpeculationFailedHigherEqual 1.32 + * 1.33 + */ 1.34 + 1.35 +public class TestSpeculationFailedHigherEqual { 1.36 + 1.37 + static class A { 1.38 + void m() {} 1.39 + int i; 1.40 + } 1.41 + 1.42 + static class C extends A { 1.43 + } 1.44 + 1.45 + static C c; 1.46 + 1.47 + static A m1(A a, boolean cond) { 1.48 + // speculative type for a is C not null 1.49 + if (cond ) { 1.50 + a = c; 1.51 + } 1.52 + // speculative type for a is C (may be null) 1.53 + int i = a.i; 1.54 + return a; 1.55 + } 1.56 + 1.57 + static public void main(String[] args) { 1.58 + C c = new C(); 1.59 + TestSpeculationFailedHigherEqual.c = c; 1.60 + for (int i = 0; i < 20000; i++) { 1.61 + m1(c, i%2 == 0); 1.62 + } 1.63 + 1.64 + System.out.println("TEST PASSED"); 1.65 + } 1.66 +}