[Bug libfortran/93871] COTAN is slow for complex types

[kargl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93871

--- Comment #23 from kargl at gcc dot gnu.org ---
Created attachment 47913
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47913&action=edit
Diff that replaces handling of degree trig functions.