[llvm] [SCEVPatternMatch] Extend m_scev_AffineAddRec with Loop (PR #141132)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

For reference, this is what I had https://github.com/llvm/llvm-project/pull/141141

It adds separate matchers for loops. It makes things a bit more verbose, but more flexible. WDYT?

https://github.com/llvm/llvm-project/pull/141132