[Webkit-unassigned] [Bug 74682] New: Value profiling should distinguished between NaN and non-NaN doubles

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=74682

           Summary: Value profiling should distinguished between NaN and
                    non-NaN doubles
           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


We can do some optimizations if we know that a double is non-NaN.  For example, we can check that it is a double by simply comparing it against itself.  Currently this would be hazardous since the value profiler makes no distinction between NaN and non-NaN doubles.

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