https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116075
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Note I filed PR 116081 for maybe the real issue with the original testcase where there is a difference if you use a typedef or not. I am going to keep this for optimizing VEC_SHL_INSERT though because I have a patch which I am testing and will be submitting either tonight or tomorrow.