• bmeurer's avatar
    [crankshaft] Protect against deopt loops from string length overflows. · cb19257a
    bmeurer authored
    Crankshaft just unconditionally deoptimizes the code when the length of
    a string addition result would overflow. In order to protect against
    deopt loops we insert a global protector cell.
    
    We will use the same mechanism for inlining certain string additions
    into TurboFan as well, and protecting against overflow (we will also
    extend this to deal with String.prototype.concat and friends once we
    get there).
    
    BUG=v8:5404
    R=jarin@chromium.org,hpayer@chromium.org
    
    Review-Url: https://codereview.chromium.org/2348293002
    Cr-Commit-Position: refs/heads/master@{#39511}
    cb19257a
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