https://gcc.gnu.org/bugzilla/show_bug.cgi?id=31485
--- Comment #22 from rguenther at suse dot de <rguenther at suse dot de> --- On Tue, 21 Apr 2020, jakub at gcc dot gnu.org wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=31485 > > Jakub Jelinek <jakub at gcc dot gnu.org> changed: > > What |Removed |Added > ---------------------------------------------------------------------------- > CC| |hjl.tools at gmail dot com, > | |hubicka at gcc dot gnu.org, > | |matz at gcc dot gnu.org > > --- Comment #19 from Jakub Jelinek <jakub at gcc dot gnu.org> --- > CCing Micha and Honza on the ABI question. The arguments are class SSE (__m64), but I fail to find clarification as to whether "unused" parts of argument registers (the SSEUP part of the %xmmN register) is supposed to be zeroed or has unspecified contents.
