https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90433
--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> --- (In reply to Andrew Pinski from comment #2) > The trunk we don't vectorize the code any more ..... I thought it might be because we found a way to use memcpy instead, which would have been good, but no, the vect dump shows an extremely common gcc issue missed: not vectorized: more than one data ref in stmt: MEM[(struct _Tuple_impl *)__cur_14].D.36092 = MEM[(struct _Tuple_impl &)__first_19].D.36092;