[clang] [compiler-rt] [llvm] [ConstantFolding] Canonicalize constexpr GEPs to i8 (PR #89872)

[Nikita Popov via llvm-commits]

nikic wrote:

> btw we're still looking into a performance regression caused by #68882 that still repros with LLVM head, even after the SROA enhancements. this patch looks good, but can we hold off a bit on submitting this?

Sure!

https://github.com/llvm/llvm-project/pull/89872