[Bug c++/119405] Missed FMA optimization for C code present in C++

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119405

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106902#c36

So this is by design. Except maybe C++ front-end should change too.