1a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Copyright 2009 the V8 project authors. All rights reserved.
2a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Redistribution and use in source and binary forms, with or without
3a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// modification, are permitted provided that the following conditions are
4a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// met:
5a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block//
6a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block//     * Redistributions of source code must retain the above copyright
7a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block//       notice, this list of conditions and the following disclaimer.
8a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block//     * Redistributions in binary form must reproduce the above
9a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block//       copyright notice, this list of conditions and the following
10a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block//       disclaimer in the documentation and/or other materials provided
11a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block//       with the distribution.
12a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block//     * Neither the name of Google Inc. nor the names of its
13a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block//       contributors may be used to endorse or promote products derived
14a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block//       from this software without specific prior written permission.
15a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block//
16a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block
28a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Make sure we don't allocate the arguments object over and
29a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// over again.
30a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockfunction SharedLazyArguments() {
31a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block  return arguments === arguments;
32a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}
33a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block
34a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertTrue(SharedLazyArguments());
35a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block
36a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block
37a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Make sure that accessing arguments doesn't clobber any
38a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// local variables called arguments.
39a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockfunction ArgumentsOverride(x) {
40a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block  var arguments = 42;
41a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block  x = x ? x : 0;
42a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block  return x + arguments;
43a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}
44a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block
45a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertEquals(42, ArgumentsOverride());
46a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertEquals(43, ArgumentsOverride(1));
47a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertEquals(44, ArgumentsOverride(2,3));
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