[Bug fortran/52884] double precision constants promoted to 16 byte by -fdefault-real-8

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52884

--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Patch submitted at https://gcc.gnu.org/ml/fortran/2019-01/msg00251.html.