https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121535
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Frank Scheiner from comment #3) > (In reply to Andrew Pinski from comment #2) > > IA64 target is the only one which uses BImode for predicates and > > zero_call_used_regs is not ready to support BImode. > > Why does `# if __has_attribute (zero_call_used_regs)` succeed then for ia64? because it is supported; just a bug that it does not work.