[Bug c/86420] [9 regression] nextafter(0x1p-1022,0) is constant folded

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86420

--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to nsz from comment #0)
> gcc has no flag to say 'floating-point exceptions matter' (like
> -frounding-math for non-default rounding mode)

There is -ftrapping-math (on by default), although its exact meaning is
regularly questioned.