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
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// stubbed version of ToNumber
31function ToNumber(x) {
32  return 311;
33}
34
35// Reduced version of String.fromCharCode;
36// does not actually do the same calculation but exhibits untagging bug.
37function StringFromCharCode(code) {
38  var n = %_ArgumentsLength();
39  var one_byte = %NewString(n, true);
40  var i;
41  for (i = 0; i < n; i++) {
42    var code = %_Arguments(i);
43    if (!%_IsSmi(code)) code = ToNumber(code) & 0xffff;
44    if (code > 0xff) break;
45  }
46
47  var two_byte = %NewString(n - i, false);
48  for (var j = 0; i < n; i++, j++) {
49    var code = %_Arguments(i);
50    %_TwoByteSeqStringSetChar(j, code, two_byte);
51  }
52  return one_byte + two_byte;
53}
54
55StringFromCharCode(0xFFF, 0xFFF);
56StringFromCharCode(0x7C, 0x7C);
57%OptimizeFunctionOnNextCall(StringFromCharCode);
58StringFromCharCode(0x7C, 0x7C);
59StringFromCharCode(0xFFF, 0xFFF);
60