[Bug fortran/86350] Missed optimization with multiplication by zero

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86350

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Maybe the frontend can adjust the defaults for -ffinite-math-only /
-fsigned-zeros in case the IEEE module is not in scope (or whatever constraints
apply here from the language standard). That certainly allows for more
optimization.