https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111808
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Excess precision changes behavior in lots of significant ways, and I don't
really see how we could warn for this, there are different kinds of excess
precision, the i386 one of promoting float/double to long double, s390{,x} way
of promoting float to double,
different arches depending on flags either promote _Float16 operations to float
(or double or long double) or don't, so I don't really see how we could try to
evaluate expressions 3-6 different ways and warn if there is some difference
between those.
