[llvm] [VectorCombine] Fold binary op of reductions. (PR #121567)

[Mikhail Gudim via llvm-commits]

mgudim wrote:

@davemgreen I added the cost model for the `reduce.add(ext(mul(ext(A), ext(B)))` pattern. There are other dot product patterns. I would be happy to work on them if only you told me what is your preferred solution to https://github.com/llvm/llvm-project/pull/121567#issuecomment-2650197122 Can you please let me know? Or maybe you can address this later yourself?



https://github.com/llvm/llvm-project/pull/121567