[Bug tree-optimization/66992] [4.9/5/6 Regression] Incorrect array subscript is above bounds warning

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66992

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think we have some dups that are similar.