https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114302
--- Comment #3 from Richard Sandiford <rsandifo at gcc dot gnu.org> --- Ah, ok. If the main aim is to test the libgcc routines, it might be safer to use something like: typedef char v64qi __attribute__((vector_size(64))); v64qi f(v64qi x, v64qi y) { return x / y; } instead of relying on vectorisation.