[Webkit-unassigned] [Bug 172098] New: [JSC][DFG][DOMJIT] Extend CheckDOM to CheckSubClass

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=172098

            Bug ID: 172098
           Summary: [JSC][DFG][DOMJIT] Extend CheckDOM to CheckSubClass
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: utatane.tea at gmail.com

CheckDOM is not DOMJIT specific thing. It performs subclass-of with the given ClassInfo*.
We can expand it to accept arbitrary ClassInfo*.
And ClassInfo* itself should have a way to teach DFG the way to perform faster class info check instead of having checkDOM function in each DOMJIT annotation.

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