It should be consistent: the PC that it stores into ArgumentCount + TagOffset should always be the *current* PC. This allows us to kill off a bunch of nasty code, and it should also make it easier to have dispatchAfterCall() do the job previously done by op_call_put_result.
Created attachment 203390 [details] the patch
Comment on attachment 203390 [details] the patch r=me
Landed in http://trac.webkit.org/changeset/150993