[llvm] [DSE] Use alias analysis to identify no-op stores (PR #122610)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

> Compile-time: http://llvm-compile-time-tracker.com/compare.php?from=bfe93aedcc7d393c2697e66d6569baffb701ba6f&to=d41dfc385f0a808507612043cf76924d721aa325&stat=instructions:u

Hmm seems quite high for no changes. @AlexMaclean do you have any data on how many additional stores can be removed with this change on larger workloads?

https://github.com/llvm/llvm-project/pull/122610