https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102989
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |hjl.tools at gmail dot com --- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> --- The x86-64 psABI has been changed for this: https://gitlab.com/x86-psABIs/x86-64-ABI/-/commit/8ca45392570e96920f8a15d903d6122f6d263cd0 but the state of the padding bits isn't mentioned there anywhere. Also, not sure I understand the \texttt{_BitInt(N)} types are byte-aligned to the next greatest power-of-2 up to 64 bits. sentence because for N <= 64 there are different rules that apply (size and alignment same as smallest standard integral type that can contain them) and so IMHO it should just say that the N > 64 bit-precise types are 64-bit aligned.