[Bug tree-optimization/30187] accessing an element via a "pointer" on a vector does not cause vec_extract to be used (non constant index)

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=30187

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I wonder if we could use a __builtin_shuffle here followed by an extraction.