[Bug tree-optimization/118657] Missed optimization (unreachable branch could be pruned after taking into account the possible values of a constexpr lookup table)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118657

--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
There's a VRP bug (with a patch from Jakub) that made VRP for array[i] with
constant initializer compute a range of the load based on the range of 'i'
(but obviously that can be expensive).