[llvm] Fold patterns which uses v4i32 type for equality comparison on v2i64 type (PR #184328)

[Simon Pilgrim via llvm-commits]

RKSimon wrote:

VectorCombine is typically just used for cost driven vector folds, while this is a more standard simplification - InstCombine might be a better place to host it.

https://github.com/llvm/llvm-project/pull/184328