70 lines
2.3 KiB
JavaScript
70 lines
2.3 KiB
JavaScript
|
// 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(
|
||
|
|
"Tests that a dead use of Math.min(a,b) at least speculates that its arguments are indeed numbers."
|
||
|
|
);
|
||
|
|
|
||
|
|
function foo(a, b) {
|
||
|
|
Math.min(a.f, b.f);
|
||
|
|
return 100;
|
||
|
|
}
|
||
|
|
|
||
|
|
function bar(a, b) {
|
||
|
|
Math.min(a.f, b.f);
|
||
|
|
return 100;
|
||
|
|
}
|
||
|
|
|
||
|
|
var x = {f:42};
|
||
|
|
var y = {f:43};
|
||
|
|
var ok = null;
|
||
|
|
var expected = 42;
|
||
|
|
var empty = "";
|
||
|
|
|
||
|
|
for (var i = 0; i < 200; ++i) {
|
||
|
|
if (i == 150) {
|
||
|
|
x = {f:{valueOf:function(){ ok = i; return 37; }}};
|
||
|
|
expected = 37;
|
||
|
|
}
|
||
|
|
var result = eval(empty + "foo(x, y)");
|
||
|
|
if (i >= 150)
|
||
|
|
shouldBe("ok", "" + i);
|
||
|
|
shouldBe("result", "100");
|
||
|
|
}
|
||
|
|
|
||
|
|
x = {f:42};
|
||
|
|
y = {f:43};
|
||
|
|
ok = null;
|
||
|
|
expected = 42;
|
||
|
|
|
||
|
|
for (var i = 0; i < 200; ++i) {
|
||
|
|
if (i == 150) {
|
||
|
|
y = {f:{valueOf:function(){ ok = i; return 37; }}};
|
||
|
|
expected = 37;
|
||
|
|
}
|
||
|
|
var result = eval(empty + "bar(x, y)");
|
||
|
|
if (i >= 150)
|
||
|
|
shouldBe("ok", "" + i);
|
||
|
|
shouldBe("result", "100");
|
||
|
|
}
|