v8/test/webkit/codegen-peephole-locals.js

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// 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 whether peephole optimizations on bytecode properly deal with local registers."
);
function if_less_test()
{
var a = 0;
var b = 2;
if (a = 1 < 2)
return a == 1;
}
shouldBeTrue("if_less_test()");
function if_else_less_test()
{
var a = 0;
var b = 2;
if (a = 1 < 2)
return a == 1;
else
return false;
}
shouldBeTrue("if_else_less_test()");
function conditional_less_test()
{
var a = 0;
var b = 2;
return (a = 1 < 2) ? a == 1 : false;
}
shouldBeTrue("conditional_less_test()");
function logical_and_less_test()
{
var a = 0;
var b = 2;
return (a = 1 < 2) && a == 1;
}
shouldBeTrue("logical_and_less_test()");
function logical_or_less_test()
{
var a = 0;
var b = 2;
var result = (a = 1 < 2) || a == 1;
return a == 1;
}
shouldBeTrue("logical_or_less_test()");
function do_while_less_test()
{
var a = 0;
var count = 0;
do {
if (count == 1)
return a == 1;
count++;
} while (a = 1 < 2)
}
shouldBeTrue("do_while_less_test()");
function while_less_test()
{
var a = 0;
while (a = 1 < 2)
return a == 1;
}
shouldBeTrue("while_less_test()");
function for_less_test()
{
for (var a = 0; a = 1 < 2; )
return a == 1;
}
shouldBeTrue("for_less_test()");