https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102281
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- (In reply to rguent...@suse.de from comment #3) > > I doubt we support vectors of long double, so it is mainly whether > > returning of > > long double or _Complex long double works fine. > > for this specific issue it might be enough to not bother initializing > padding of is_gimple_reg_type types, I doubt we have any of those > that have padding (and if we'd have then the issue would re-surface) long double and _Complex long double do have padding and clearing it is desirable (for -ftrivial-auto-var-init*) or a requirement (e.g. for atomics, whether OpenMP or std::atomic (unfortunately not implemented yet in libstdc++). The hw instruction really do store only 10 bytes and leave the rest uninitialized...
