[Webkit-unassigned] [Bug 81840] New: DFG speculation on booleans should be rationalized

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=81840

           Summary: DFG speculation on booleans should be rationalized
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: fpizlo at apple.com


Right now there is a bit of a mess of calls to isKnownBoolean() for some code paths and shouldSpeculateBoolean() for others. From the standpoint of trying to reason about the types of nodes, we should stick to using shouldSpeculateBoolean() as the main guard, which secondary guards based on AbstractState to determine if the boolean checks have already been performed.

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