What's the point of byte-compile-define-keymap?

[Alan Mackenzie]

Hello, Emacs.

It looks to me that byte-compile-define-keymap (in
lisp/emacs-lisp/bytecomp.el) saves its FORM argument in ORIG-FORM and
always returns it unchanged.  This looks like an oversight.

Also, would this function not better be named
byte-compile-FILE-FORM-define-keymap, since it is the value of a
byte-hunk-handler symbol property.

Also[2], is this function really necessary?  Is define-keymap used
sufficiently often to justify a special byte-hunk-handler for it?

-- 
Alan Mackenzie (Nuremberg, Germany).