[Bug c/115374] fmod() in x86_64 -O3 not using return value from the glibc's implementation if x87 FPU fprem returns NaN

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115374

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Yep, it's call DCE which elides the errno setting function call iff the result
is not NaN.