[Bug tree-optimization/124099] [16 Regression] emutls not handling replacement in returns correctly happens since r16-7504

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124099

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
What I am going to do is restrict optimize_agr_copyprop_return to only support
local decls to prop into the return.