https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64703
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> --- 4.6 seems to optimize it away too, 4.4 does not. Anyway, strictly speaking the code is invalid, the standard does not allow conversions between data and function pointers I believe. I'd say the asm barrier in the code would be best.