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annotate test/compiler/types/TestMeetTopArrayExactConstantArray.java @ 14726:92aa6797d639
Backed out merge changeset: b51e29501f30
Backed out merge revision to its first parent (8f483e200405)
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Mon, 24 Mar 2014 21:30:43 +0100 |
| parents | 45b0159f30f2 |
| children |
| rev | line source |
|---|---|
| 14228 | 1 /* |
| 2 * Copyright (c) 2013, 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 8027571 | |
| 27 * @summary meet of TopPTR exact array with constant array is not symmetric | |
|
14726
92aa6797d639
Backed out merge changeset: b51e29501f30
Doug Simon <doug.simon@oracle.com>
parents:
14681
diff
changeset
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28 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseOnStackReplacement -XX:TypeProfileLevel=222 -XX:+UnlockExperimentalVMOptions -XX:+UseTypeSpeculation -XX:-BackgroundCompilation TestMeetTopArrayExactConstantArray |
| 14228 | 29 * |
| 30 */ | |
| 31 | |
| 32 public class TestMeetTopArrayExactConstantArray { | |
| 33 | |
| 34 static class A { | |
| 35 } | |
| 36 | |
| 37 static class B { | |
| 38 } | |
| 39 | |
| 40 static class C extends A { | |
| 41 } | |
| 42 | |
| 43 static class D extends C { | |
| 44 } | |
| 45 | |
| 46 final static B[] b = new B[10]; | |
| 47 | |
| 48 static void m0(Object[] o) { | |
| 49 if (o.getClass() == Object[].class) { | |
| 50 } | |
| 51 } | |
| 52 | |
| 53 static void m1(Object[] o, boolean cond) { | |
| 54 if (cond) { | |
| 55 o = b; | |
| 56 } | |
| 57 m0(o); | |
| 58 } | |
| 59 | |
| 60 static void m2(Object[] o, boolean cond1, boolean cond2) { | |
| 61 if (cond1) { | |
| 62 m1(o, cond2); | |
| 63 } | |
| 64 } | |
| 65 | |
| 66 static void m3(C[] o, boolean cond1, boolean cond2, boolean cond3) { | |
| 67 if (cond1) { | |
| 68 m2(o, cond2, cond3); | |
| 69 } | |
| 70 } | |
| 71 | |
| 72 static public void main(String[] args) { | |
| 73 A[] a = new A[10]; | |
| 74 D[] d = new D[10]; | |
| 75 Object[] o = new Object[10]; | |
| 76 for (int i = 0; i < 5000; i++) { | |
| 77 // record in profiling that the if in m0 succeeds | |
| 78 m0(o); | |
| 79 // record some profiling for m2 and m1 | |
| 80 m2(a, true, (i%2) == 0); | |
| 81 // record some profiling for m3 and conflicting profile for m2 | |
| 82 m3(d, true, false, (i%2) == 0); | |
| 83 } | |
| 84 | |
| 85 // get m3 compiled. The if in m0 will be optimized because of argument profiling in m3 | |
| 86 C[] c = new C[10]; | |
| 87 for (int i = 0; i < 20000; i++) { | |
| 88 m3(c, true, false, (i%2) == 0); | |
| 89 } | |
| 90 // make m3 not entrant and the if in m0 fail | |
| 91 m3(c, true, true, false); | |
| 92 m3(c, true, true, false); | |
| 93 m3(c, true, true, false); | |
| 94 m3(c, true, true, false); | |
| 95 | |
| 96 // make m3 recompile, this time with if the not optimized | |
| 97 // on entry to m3, argument o is of type C[], profiled C[] | |
| 98 // on entry to m1, argument o is of type C[], speculative C[] exact, profiled A[]. Speculative becomes AnyNull | |
| 99 // after the if in m1, speculative type of o becomes constant from final field b | |
| 100 // 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[] | |
| 101 for (int i = 0; i < 20000; i++) { | |
| 102 m3(c, true, false, (i%2) == 0); | |
| 103 } | |
| 104 | |
| 105 System.out.println("TEST PASSED"); | |
| 106 } | |
| 107 } |