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    [FeedbackVector] Clarify the way the feedback vector is installed. · a1bba7fe
    mvstanton authored
    Installing a feedback vector in a closure is a multi-step process.
    The closure actually points to a Cell that points to a feedback
    vector or undefined if we haven't created one yet.
    This happens because we often create closures before we've compiled
    the code.
    
    JSFunction::EnsureLiterals is the bottleneck in our system that
    creates a feedback vector if necessary. The predicates it used to
    determine what to do were arcane. This CL allows it to think it
    terms of state, and clarifies the reading of that useful
    bottleneck.
    
    I also did a few renamings in parts of the code that referred
    to a "literals array," which we don't have any more.
    
    BUG=
    
    Review-Url: https://codereview.chromium.org/2681773004
    Cr-Commit-Position: refs/heads/master@{#43035}
    a1bba7fe
runtime-scopes.cc 37.2 KB