https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19779
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- We do fold it with -ffast-math or -funsafe-math-optimizations. PR19405 explains the reasons why we can't fold those results that aren't exactly representable in double double.