[Webkit-unassigned] [Bug 67993] Prediction tracking is not precise enough

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=67993





--- Comment #11 from Filip Pizlo <fpizlo at apple.com>  2011-09-14 12:03:01 PST ---
(In reply to comment #9)
> Based on your explanation, I think something like this would help:
> 
> +static const PredictedType PredictObjectMask        = 0x003f; // Bitmask used for testing for any kind of object prediction.
> +static const PredictedType PredictFinalObject   = 0x0001; // It's definitely a JSFinalObject.
> +static const PredictedType PredictArray         = 0x0002; // It's definitely a JSArray.
> +static const PredictedType PredictObjectOther   = 0x0010; // It's definitely an object other than JSFinalObject or JSArray.
> +static const PredictedType PredictObjectUnknown    = 0x0020; // It's definitely an object, but we didn't record enough information to know more.

Yeah, that's better.  I'll make that change and then land.

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