https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89749
Marc Glisse <glisse at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |missed-optimization Status|UNCONFIRMED |NEW Last reconfirmed| |2019-03-18 Ever confirmed|0 |1 --- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> --- simplify_vector_constructor is supposed to handle this, but doesn't because it is scared by the mix between a vector of short and a vector of long long. This check is probably too strict.