[llvm] Redesign Straight-Line Strength Reduction (SLSR) (PR #162930)

[Drew Kersnar via llvm-commits]

https://github.com/dakersnar approved this pull request.

Nice work, this seems like a big improvement. LGTM, with the caveat that I'm somewhat new to this pass and I would recommend getting a second approval.

https://github.com/llvm/llvm-project/pull/162930