[llvm] [InstCombine] Support offsets in `memset` to load forwarding (PR #151924)

[Nikita Popov via llvm-commits]

================

----------------
nikic wrote:

Please rebase over https://github.com/llvm/llvm-project/commit/b18377ccad8dd330622b012df0ec73fc5bf768a4, the diff is unintelligible with partial check lines.

I think you need to adjust the comment to say that we're checking that the value from the memset rather than the preceding store is forwarded.

https://github.com/llvm/llvm-project/pull/151924