https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105032
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- If this is a macro that users should use in arbitrary user code, there is another problem, if something is vectorized in the function, either using AVX or later or -mstackrealign is used, another register is needed for the stack realignment (DRAP register).
