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.
49 lines
2.5 KiB
49 lines
2.5 KiB
14 years ago
|
// Copyright 2010 the V8 project authors. All rights reserved.
|
||
|
|
// Redistribution and use in source and binary forms, with or without
|
||
|
|
// modification, are permitted provided that the following conditions are
|
||
|
|
// met:
|
||
|
|
//
|
||
|
|
// * Redistributions of source code must retain the above copyright
|
||
|
|
// notice, this list of conditions and the following disclaimer.
|
||
|
|
// * 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.
|
||
|
|
// * Neither the name of Google Inc. nor the names of its
|
||
|
|
// contributors may be used to endorse or promote products derived
|
||
|
|
// from this software without specific prior written permission.
|
||
|
|
//
|
||
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
|
||
|
|
// OWNER OR 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.
|
||
|
|
|
||
|
|
// Regression test for failure to deoptimize properly when the most recent
|
||
|
|
// side effect occurred in a comma expression in an effect context.
|
||
|
|
|
||
|
|
// An unoptimizable function, calling it is a side effect.
|
||
|
|
function side_effect() { try {} finally {} return "wrong"; }
|
||
|
|
|
||
|
|
// A function to observe the value of its first argument.
|
||
|
|
function observe(x, y) { try {} finally {} return x; }
|
||
|
|
|
||
|
|
// If we optimize for x a smi, then x a string will deopt. The side effect
|
||
|
|
// immediately before the deopt is in a comma expresion in an effect context
|
||
|
|
// (i.e., itself the left subexpression of a comma expression).
|
||
|
|
function test(x) { return observe(this, ((0, side_effect()), x + 1)); }
|
||
|
|
|
||
|
|
// Run test enough times to get it optimized.
|
||
|
|
for (var i = 0; i < 1000000; ++i) test(0);
|
||
|
|
|
||
|
|
// Force test to deopt. If it behaves normally, it should return the global
|
||
|
|
// object. If the value of the call to side_effect() is lingering after the
|
||
|
|
// deopt, it will return the string "wrong".
|
||
|
|
assertFalse(test("a") === "wrong");
|