compiler-macroexpand

compiler-macroexpand is an alias for `cl-compiler-macroexpand' in `cl.el'.

(compiler-macroexpand FORM)

Like `macroexpand', but for compiler macros.
Expands FORM repeatedly until no further expansion is possible.
Returns FORM unchanged if it has no compiler macro, or if it has a
macro that returns its `&whole' argument.