[Bug tree-optimization/123672] __builtin_shufflevector() produces incorrect code with -ftree-forwprop

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123672

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
There might be a dup of this and might even be fixed on the trunk.