[Webkit-unassigned] [Bug 77858] New: OSR loop entry into DFG sometimes happens at loops for which we have no CFA information

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=77858

           Summary: OSR loop entry into DFG sometimes happens at loops for
                    which we have no CFA information
           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


This is a two-fold bug:

1) OSR entry should not have succeeded in that case.

2) CFA should not have thought the loop to be not executable.

We should fix both bugs.

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