https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116149
--- Comment #3 from Robin Dapp <rdapp at gcc dot gnu.org> --- It looks like the problem is a wrong mode_idx attribute for the wx variants of the adds. The widening adds's mode is the one of the non-widened input operand but for the wx/scalar variants this is a scalar mode instead of a vector mode. That confuses avlprop so that it uses 1 instead of 4 as vector length. Testing a patch.
