1// Copyright 2013 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
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13//       contributors may be used to endorse or promote products derived
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15//
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19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// Flags: --allow-natives-syntax --use-escape-analysis --max-opt-count=100
29
30// This tests that captured objects materialized through the deoptimizer
31// have field descriptors with a representation matching the values that
32// have actually been stored in the object.
33
34var values = [ function() { return {}; },
35               function() { return 23; },
36               function() { return 4.2; } ];
37
38function constructor(value_track) {
39  this.x = value_track();
40}
41
42function access(value_track, value_break, deopt) {
43  var o = new constructor(value_track);
44  o.x = value_break;
45  deopt.deopt
46  assertEquals(value_break, o.x);
47}
48
49function test(value_track, value_break) {
50  var deopt = { deopt:false };
51
52  // Warm-up field tracking to a certain representation.
53  access(value_track, value_track(), deopt);
54  access(value_track, value_track(), deopt);
55  %OptimizeFunctionOnNextCall(access);
56  access(value_track, value_track(), deopt);
57
58  // Deoptimize on a run with a different representation.
59  delete deopt.deopt;
60  access(value_track, value_break(), deopt);
61
62  // Clear type feedback of the access function for next run.
63  %ClearFunctionTypeFeedback(access);
64
65  // Also make sure the initial map of the constructor is reset.
66  constructor.prototype = {};
67}
68
69for (var i = 0; i < values.length; i++) {
70  for (var j = 0; j < values.length; j++) {
71    test(values[i], values[j])
72  }
73}
74