https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105358
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Still trying to understand where the problem is. In work.c (gomp_init_work_share), there are 3 cases, one is ordered == 0, another one ordered == 1, another one bigger numbers. The first one doesn't care, ordered_team_ids is initialized to inline_ordered_team_ids just to make sure we don't try to team_free it, isn't really used. For ordered == 1 case, we only use the trailing array as array of unsigned and most likely in the darwin9 case not at all, because I expect INLINE_ORDERED_TEAM_IDS_SIZE to be 0 or 4 or something that small. For the ordered > 1 case (used when some memory needs to be allocated after the ordered_teams_ids array and that one should be possibly 8-byte aligned) it adds extra __alignof__ (long long) - 1 to the size but undoes that if nthreads is even and inline_ordered_team_ids is at position divisible by 8. So, guess some question, can you e.g. from dumping DWARF on work.o find out: sizeof (struct gomp_init_work_share) offsetof (struct gomp_init_work_share, inline_ordered_team_ids) ?
