[Bug middle-end/100839] -O2 does dangerous optimizations using FMA (please don't break my cross product)

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100839

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Daniel Gibson from comment #6)
> Are you sure about this?
> I couldn't find much about floats (and nothing about legal transformations)
> in the C++ standard, and if it's in IEEE-754 it should be the same for C and
> C++, right?

C is just different here from C++ :).