https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93459
--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> --- For __builtin_ia32_vec_ext_v4si, shouldn't we lower it to an array access in gimple, when the second argument is constant? I assume we don't want to do it directly in smmintrin.h for diagnostic purposes.
