https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91824
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org --- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Created attachment 47731 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47731&action=edit gcc10-pr91824-2.patch And untested patch handling the sign extensions of movmsk insns. For those, zero extension has been already handled, and sign extension can be handled by all too except for _mm256_movemask_epi8.