1// Copyright 2012 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,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// Flags: --allow-natives-syntax
29
30// Create elements in a constructor function to ensure map sharing.
31function TestConstructor() {
32  this[0] = 1;
33  this[1] = 2;
34  this[2] = 3;
35}
36
37function bad_func(o,a) {
38  var s = 0;
39  for (var i = 0; i < 1; ++i) {
40    o.newFileToChangeMap = undefined;
41    var x = a[0];
42    s += x;
43  }
44  return s;
45}
46
47o = new Object();
48a = new TestConstructor();
49bad_func(o, a);
50
51// Make sure that we're out of pre-monomorphic state for the member add of
52// 'newFileToChangeMap' which causes a map transition.
53o = new Object();
54a = new TestConstructor();
55bad_func(o, a);
56
57// Optimize, before the fix, the element load and subsequent tagged-to-i were
58// hoisted above the map check, which can't be hoisted due to the map-changing
59// store.
60o = new Object();
61a = new TestConstructor();
62%OptimizeFunctionOnNextCall(bad_func);
63bad_func(o, a);
64
65// Pass in a array of doubles. Before the fix, the optimized load and
66// tagged-to-i will treat part of a double value as a pointer and de-ref it
67// before the map check was executed that should have deopt.
68o = new Object();
69// Pass in an elements buffer where the bit representation of the double numbers
70// are two adjacent small 32-bit values with the lowest bit set to one, causing
71// tagged-to-i to SIGSEGV.
72a = [2.122e-314, 2.122e-314, 2.122e-314];
73bad_func(o, a);
74