[Webkit-unassigned] [Bug 67670] New: DFG JIT does not optimize booleans

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Sep 6 13:52:19 PDT 2011


https://bugs.webkit.org/show_bug.cgi?id=67670

           Summary: DFG JIT does not optimize booleans
           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


The DFG JIT tries to perform type-specific optimizations, particularly for arrays, cells, integers, and doubles.  But it does nothing for booleans, even though some obvious optimizations are possible, like simplifying the code emitted for Branch() if the input is known or predicted boolean.

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