regress-1167.js revision e0cee9b3ed82e2391fd85d118aeaa4ea361c687d 
1// Copyright 2011 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
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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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24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// Deoptimization after a logical not in an effect context should not see a
29// value for the logical not expression.
30function test0(n) {
31  var a = new Array(n);
32  for (var i = 0; i < n; ++i) {
33    // ~ of a non-numeric value is used to trigger deoptimization.
34    a[i] = void(!(delete 'object')) % ~(delete 4);
35  }
36}
37
38// OSR (after deoptimization) is used to observe the stack height mismatch.
39for (var i = 0; i < 5; ++i) {
40  for (var j = 1; j < 12; ++j) {
41    test0(j * 1000);
42  }
43}
44
45
46// Similar test with a different subexpression of unary !.
47function test1(n) {
48  var a = new Array(n);
49  for (var i = 0; i < n; ++i) {
50    a[i] = void(!(- 'object')) % ~(delete 4);
51  }
52}
53
54for (i = 0; i < 5; ++i) {
55  for (j = 1; j < 12; ++j) {
56    test1(j * 1000);
57  }
58}
59
60
61// A similar issue, different subexpression of unary ! (e0 !== e1 is
62// translated into !(e0 == e1)) and different effect context.
63function side_effect() { }
64function observe(x, y) { return x; }
65function test2(x) {
66  return observe(this,
67                 (((side_effect.observe <= side_effect.side_effect) !== false),
68                  x + 1));
69}
70
71for (var i = 0; i < 1000000; ++i) test2(0);
72test2(test2);
73