This is necessary to match baseline JIT argument capture behavior.
Created attachment 136412 [details] the patch
<rdar://problem/11215848>
Created attachment 136557 [details] the patch
Comment on attachment 136557 [details] the patch Attachment 136557 [details] did not pass mac-ews (mac): Output: http://queues.webkit.org/results/12380546
Created attachment 136559 [details] the patch
Comment on attachment 136559 [details] the patch ArgumentPosition isn't a position, so I'd suggest a different name, but since I don't have a better one, R+ either way.
Landed in http://trac.webkit.org/changeset/113796