[Webkit-unassigned] [Bug 145721] New: Sink real number type checks below the first arithmetic operation

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=145721

            Bug ID: 145721
           Summary: Sink real number type checks below the first
                    arithmetic operation
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: fpizlo at apple.com

In cases like:

o.x + o.y

Where the two operands are likely real doubles, we currently do NaN checks for both operands before doing the addition.  Instead, we could do the NaN check after speculatively doing the addition.

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