[Webkit-unassigned] [Bug 98893] New: Replace (typeof(x) != <>) with !(typeof(x) == <>)
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Wed Oct 10 06:11:33 PDT 2012
https://bugs.webkit.org/show_bug.cgi?id=98893
Summary: Replace (typeof(x) != <>) with !(typeof(x) == <>)
Product: WebKit
Version: 528+ (Nightly build)
Platform: All
OS/Version: All
Status: UNCONFIRMED
Severity: Normal
Priority: P2
Component: JavaScriptCore
AssignedTo: webkit-unassigned at lists.webkit.org
ReportedBy: valery.ignatyev at ispras.ru
Replace (typeof(x) != <"object", "undefined", ...>) with !(typeof(x) == {"object",..}). Later is_object, is_<...> bytecode operation will be used.
This eliminates expensive typeof implementation and allows to use DFG optimizations, which doesn't support 'typeof'.
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