[llvm] [ConstantFolding] Fold vector.partial.reduce.add constants (PR #212112)

[Jeong Jihyeon via llvm-commits]

JihyeonJeong129 wrote:

@RKSimon I found that #207560 and #210351 cover closely related constant folding for vector reduction and partial-reduction nodes. In particular, #210351 uses the same I % NumAccElts grouping selected by TargetLowering::expandPartialReduceMLA.

When you have a chance, would you be able to review this PR? If you are still unavailable, could you suggest or help connect an appropriate reviewer familiar with ConstantFolding and vector intrinsics?

https://github.com/llvm/llvm-project/pull/212112