jdk8-mips64-public/hotspot: test/compiler/types/TestMeetTopArrayExactConstantArray.java@fb9d124d9192 (annotated)

test/compiler/types/TestMeetTopArrayExactConstantArray.java@fb9d124d9192 (annotated)

test/compiler/types/TestMeetTopArrayExactConstantArray.java

Wed, 21 May 2014 10:56:41 -0700

author: katleman
date: Wed, 21 May 2014 10:56:41 -0700
changeset 6672: fb9d124d9192
parent 6384: 8f28240318a2
child 6876: 710a3c8b516e
permissions: -rw-r--r--

Added tag jdk8u20-b15 for changeset 8c785f9bde6f

 /*
  * 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");
     }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

test/compiler/types/TestMeetTopArrayExactConstantArray.java@fb9d124d9192 (annotated)

test/compiler/types/TestMeetTopArrayExactConstantArray.java