The compiler may transform some functions such that they are present in the source code but not in the compiled code.
For example, the compiler transforms this source expression:
(member 'x '(x y z) :test #'eq)
into this compiled expression:
(memq 'x '(x y z))
will appear instead of
in the profile results.
Similarly, you cannot profile inlined functions.
LispWorks IDE User Guide (Macintosh version) - 25 Nov 2011