[llvm] [flang] [clang] [InstCombine] Canonicalize constant GEPs to i8 source element type (PR #68882)

[Nikita Popov via cfe-commits]

nikic wrote:

> > arrayidx
> 
> We should teach `foldCmpLoadFromIndexedGlobal` to handle constant GEPs with i8 source element type.

There is a pending patch related to this: https://github.com/llvm/llvm-project/pull/67093

https://github.com/llvm/llvm-project/pull/68882