[Bug tree-optimization/121460] `switch (v + 20) case` should optimize away the addition

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121460

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> More interesting for multiplications I guess.

So from my understanding this shows up in rust code; I am not 100% sure if
gccrust produces the switch statement here but we will see.