[Bug fortran/68560] [6 Regression] The test gfortran.dg/shape_8.f90 now fails when compiled with -flto

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68560

--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> In this case, the argument _is_ present, so it's not removed in the procedure
> declaration.  This seems to be done on purpose (grep for ignore_optional) but I
> must admit that I don't understand why.

Indeed I have seen 'ignore_optional', but I did not understand what it was
supposed to do (as in "don't emit it").