https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79927
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- 1e6 is floating point. So: >((1 << (sizeof(((struct my_struct *) 0)->n_usecs) * 8)) / ONE_MILLION >= 16) - 1 is not integer constant expression.