src/v8/test/webkit/dfg-cfa-prove-put-by-id-simple-when-storing-to-specialized-function.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.
//
// 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(
"Checks that the DFG CFA does the right things if it proves that a put_by_id is a simple replace when storing to a specialized function property."
);

function foo(o, v) {
    o.f = v;
}

// Warm up foo's put_by_id to make it look polymorphic.
for (var i = 0; i < 100; ++i)
    foo(i % 2 ? {a: 1} : {b: 2});

function bar(f) {
    foo(this, f);
    return this.f();
}

function baz() {
    debug("baz!");
    return "baz";
}

for (var i = 0; i < 100; ++i)
    shouldBe("bar.call({f:baz}, baz)", "\"baz\"");

function fuzz() {
    debug("fuzz!");
    return "fuzz";
}

shouldBe("bar.call({f:baz}, fuzz)", "\"fuzz\"");