[Webkit-unassigned] [Bug 86306] DFG should be able to optimize foo.apply(bar, arguments)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=86306


Filip Pizlo <fpizlo at apple.com> changed:

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--- Comment #9 from Filip Pizlo <fpizlo at apple.com>  2012-05-13 17:02:40 PST ---
Created an attachment (id=141619)
 --> (https://bugs.webkit.org/attachment.cgi?id=141619&action=review)
the patch

I forgot that optimizing op_call_varargs to use arguments directly implies that we need to first check that the arguments object has not been created.  This revised version of the patch does this, though imperfectly; the only hole (use of static speculation) will be fixed in https://bugs.webkit.org/show_bug.cgi?id=86327.

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