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17619
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1 /*
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2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23
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24 /*
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25 * @test
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26 * @bug 8027571
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27 * @summary meet of TopPTR exact array with constant array is not symmetric
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17735
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28 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseOnStackReplacement -XX:TypeProfileLevel=222 -XX:+UseTypeSpeculation -XX:-BackgroundCompilation TestMeetTopArrayExactConstantArray
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17619
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29 *
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30 */
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31
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32 public class TestMeetTopArrayExactConstantArray {
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33
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34 static class A {
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35 }
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36
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37 static class B {
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38 }
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39
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40 static class C extends A {
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41 }
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42
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43 static class D extends C {
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44 }
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45
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46 final static B[] b = new B[10];
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47
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48 static void m0(Object[] o) {
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49 if (o.getClass() == Object[].class) {
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50 }
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51 }
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52
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53 static void m1(Object[] o, boolean cond) {
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54 if (cond) {
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55 o = b;
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56 }
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57 m0(o);
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58 }
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59
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60 static void m2(Object[] o, boolean cond1, boolean cond2) {
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61 if (cond1) {
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62 m1(o, cond2);
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63 }
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64 }
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65
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66 static void m3(C[] o, boolean cond1, boolean cond2, boolean cond3) {
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67 if (cond1) {
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68 m2(o, cond2, cond3);
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69 }
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70 }
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71
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72 static public void main(String[] args) {
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73 A[] a = new A[10];
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74 D[] d = new D[10];
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75 Object[] o = new Object[10];
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76 for (int i = 0; i < 5000; i++) {
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77 // record in profiling that the if in m0 succeeds
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78 m0(o);
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79 // record some profiling for m2 and m1
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80 m2(a, true, (i%2) == 0);
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81 // record some profiling for m3 and conflicting profile for m2
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82 m3(d, true, false, (i%2) == 0);
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83 }
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84
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85 // get m3 compiled. The if in m0 will be optimized because of argument profiling in m3
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86 C[] c = new C[10];
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87 for (int i = 0; i < 20000; i++) {
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88 m3(c, true, false, (i%2) == 0);
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89 }
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90 // make m3 not entrant and the if in m0 fail
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91 m3(c, true, true, false);
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92 m3(c, true, true, false);
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93 m3(c, true, true, false);
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94 m3(c, true, true, false);
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95
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96 // make m3 recompile, this time with if the not optimized
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97 // on entry to m3, argument o is of type C[], profiled C[]
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98 // on entry to m1, argument o is of type C[], speculative C[] exact, profiled A[]. Speculative becomes AnyNull
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99 // after the if in m1, speculative type of o becomes constant from final field b
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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[]
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101 for (int i = 0; i < 20000; i++) {
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102 m3(c, true, false, (i%2) == 0);
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103 }
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104
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105 System.out.println("TEST PASSED");
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106 }
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107 }
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