Mercurial > hg > truffle
view test/compiler/types/TestMeetTopArrayExactConstantArray.java @ 20118:3d3e16f6077a
Merge.
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 01 Apr 2015 15:08:55 +0200 |
parents | 45b0159f30f2 |
children | 92aa6797d639 |
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/* * Copyright (c) 2013, 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 8027571 * @summary meet of TopPTR exact array with constant array is not symmetric * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseOnStackReplacement -XX:TypeProfileLevel=222 -XX:+UseTypeSpeculation -XX:-BackgroundCompilation TestMeetTopArrayExactConstantArray * */ public class TestMeetTopArrayExactConstantArray { static class A { } static class B { } static class C extends A { } static class D extends C { } final static B[] b = new B[10]; static void m0(Object[] o) { if (o.getClass() == Object[].class) { } } static void m1(Object[] o, boolean cond) { if (cond) { o = b; } m0(o); } static void m2(Object[] o, boolean cond1, boolean cond2) { if (cond1) { m1(o, cond2); } } static void m3(C[] o, boolean cond1, boolean cond2, boolean cond3) { if (cond1) { m2(o, cond2, cond3); } } static public void main(String[] args) { A[] a = new A[10]; D[] d = new D[10]; Object[] o = new Object[10]; for (int i = 0; i < 5000; i++) { // record in profiling that the if in m0 succeeds m0(o); // record some profiling for m2 and m1 m2(a, true, (i%2) == 0); // record some profiling for m3 and conflicting profile for m2 m3(d, true, false, (i%2) == 0); } // get m3 compiled. The if in m0 will be optimized because of argument profiling in m3 C[] c = new C[10]; for (int i = 0; i < 20000; i++) { m3(c, true, false, (i%2) == 0); } // make m3 not entrant and the if in m0 fail m3(c, true, true, false); m3(c, true, true, false); m3(c, true, true, false); m3(c, true, true, false); // make m3 recompile, this time with if the not optimized // on entry to m3, argument o is of type C[], profiled C[] // on entry to m1, argument o is of type C[], speculative C[] exact, profiled A[]. Speculative becomes AnyNull // after the if in m1, speculative type of o becomes constant from final field b // the true if branch in m0 does a join between the type of o of speculative type constant from final field b and exact klass Object[] for (int i = 0; i < 20000; i++) { m3(c, true, false, (i%2) == 0); } System.out.println("TEST PASSED"); } }