mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
52 lines
2.2 KiB
52 lines
2.2 KiB
11 years ago
|
// Copyright 2013 the V8 project authors. All rights reserved.
|
||
|
|
// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
|
||
|
|
//
|
||
|
|
// Redistribution and use in source and binary forms, with or without
|
||
|
|
// modification, are permitted provided that the following conditions
|
||
|
|
// are met:
|
||
|
|
// 1. Redistributions of source code must retain the above copyright
|
||
|
|
// notice, this list of conditions and the following disclaimer.
|
||
|
|
// 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
// notice, this list of conditions and the following disclaimer in the
|
||
|
|
// documentation and/or other materials provided with the distribution.
|
||
|
|
//
|
||
|
|
// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
|
||
|
|
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
||
|
|
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||
|
|
// DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
|
||
|
|
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
||
|
|
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||
|
|
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
||
|
|
// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||
|
|
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
|
||
|
|
description(
|
||
|
|
"This tests that common subexpression elimination knows how to accurately model PutBuVal."
|
||
|
|
);
|
||
|
|
|
||
|
|
function doAccesses(a, b, i, j, y) {
|
||
|
|
var x = a[i];
|
||
|
|
b[j] = y;
|
||
|
|
return a[i];
|
||
|
|
}
|
||
|
|
|
||
|
|
var array1 = [1, 2, 3, 4];
|
||
|
|
var array2 = [5, 6, 7, 8];
|
||
|
|
|
||
|
|
for (var i = 0; i < 1000; ++i) {
|
||
|
|
// Simple test, pretty easy to pass.
|
||
|
|
shouldBe("doAccesses(array1, array2, i % 4, (i + 1) % 4, i)", "" + ((i % 4) + 1));
|
||
|
|
shouldBe("array2[" + ((i + 1) % 4) + "]", "" + i);
|
||
|
|
|
||
|
|
// Undo.
|
||
|
|
array2[((i + 1) % 4)] = (i % 4) + 5;
|
||
|
|
|
||
|
|
// Now the evil test. This is constructed to minimize the likelihood that CSE will succeed through
|
||
|
|
// cleverness alone.
|
||
|
|
shouldBe("doAccesses(array1, array1, i % 4, 0, i)", "" + ((i % 4) == 0 ? i : (i % 4) + 1));
|
||
|
|
|
||
|
|
// Undo.
|
||
|
|
array1[0] = 1;
|
||
|
|
}
|