https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70407
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |documentation Status|UNCONFIRMED |NEW Last reconfirmed| |2016-03-29 Ever confirmed|0 |1 --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- Confirmed as a documentation issue. Note that typedef struct S_ { short f[3] __attribute((aligned(8))); } S; works (and increases sizeof (S_)).