https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106001
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Actually valid testcase: typedef int V __attribute__((vector_size (2 * sizeof (int)))); template <int> void foo () { V v {}; v = __builtin_shufflevector (v, v, static_cast<char>(1), static_cast<char>(0)); } void bar () { foo <0> (); }