• bmeurer's avatar
    [turbofan] Remove remaining uses of Class type from the compiler. · 2b938990
    bmeurer authored
    We (mis)used Type::Class to track stable field maps in the past. But
    that always more or less unsupport and wrong for various reasons, mostly
    because the class types do not really present static information and
    thus it is possible to violate fundamental assumptions of the type
    system (i.e. intersecting class types and other types produces
    "interesting" results).
    
    Now it is possible to finally nuke the class types completely and thus
    simplify (and ideally correctify) the type system further.
    
    Note to performance sheriff: We do expect to see some performance
    regressions from this change. This is because we do not yet have a sane
    replacement mechanism to track known field maps and utilize them during
    LoadElimination. This will be accomplished in a follow up CL.
    
    BUG=v8:5270,v8:5267
    R=jarin@chromium.org
    
    Review-Url: https://codereview.chromium.org/2293343002
    Cr-Commit-Position: refs/heads/master@{#39031}
    2b938990
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