https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65006
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Jan Hubicka from comment #1) > Hmm, I wonder why this reproduce on x86-32 only. Does it use any special > local calling conventions that x86-64 doesn't? Yes register argument passing. That is for x86-32 we use registers to pass for the local calling convention if we can.