[llvm] [SeparateConstOffsetFromGEP] propagate const offset through GEP chains (PR #143470)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

Looks like there are some test failures.

This looks plausible, but I also feel like this is something we should be doing in InstCombine? (That is, trying to combine multiple constant offset GEPs into one, even if there are intermediate GEPs, as long as use-constraints allow.)

https://github.com/llvm/llvm-project/pull/143470