[llvm] [CodeGen] Expansion of scalable vector reductions (PR #129214)

[David Green via llvm-commits]

davemgreen wrote:

That sounds like a good place for it to me, although there might be constructs that are not intrinsics that need to be scalarized (non-aligned loads/stores with strict-align, for example). And I could imagine there are times when you want to take multiple operations and scalarize them together to generate a single loop. So long as we have one place to do the expansion of scalable vectors (or a decent amount of shared infrastructure) it sounds OK.

https://github.com/llvm/llvm-project/pull/129214