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

// 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.
//
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// 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
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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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()");