--- /dev/null 2015-02-04 15:01:25.480264309 +0100 +++ new/test/compiler/loopopts/TestPredicateLostDependency.java 2015-03-24 12:49:07.516355159 +0100 @@ -0,0 +1,84 @@ +/* + * Copyright (c) 2015, 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 8069191 + * @summary predicate moved out of loops and CastPP removal causes dependency to be lost + * @run main/othervm -Xcomp -XX:CompileOnly=TestPredicateLostDependency.m1 -XX:+IgnoreUnrecognizedVMOptions -XX:+StressGCM TestPredicateLostDependency + * + */ + +public class TestPredicateLostDependency { + static class A { + int i; + } + + static class B extends A { + } + + static boolean crash = false; + + static boolean m2() { + return crash; + } + + static int m3(float[] arr) { + return 0; + } + + static float m1(A aa) { + float res = 0; + float[] arr = new float[10]; + for (int i = 0; i < 10; i++) { + if (m2()) { + arr = null; + } + m3(arr); + int j = arr.length; + int k = 0; + for (k = 9; k < j; k++) { + } + if (k == 10) { + if (aa instanceof B) { + } + } + res += arr[0]; + res += arr[1]; + } + return res; + } + + static public void main(String args[]) { + A a = new A(); + B b = new B(); + for (int i = 0; i < 20000; i++) { + m1(a); + } + crash = true; + try { + m1(a); + } catch (NullPointerException npe) {} + } +}