[llvm] Adding change to IndVarSimplify pass to optimize IVs stuck in trivial vector operations (PR #122248)

[Nikita Popov via llvm-commits]

nikic wrote:

Thanks. I think in your particular case, I suspect it probably makes sense to scalarize the vector op independently of whether it contains an induction variable? This case creates a splat vector, does a vector add and then immediately extracts both elements. It seems unlikely that this is going to be faster than just doing two adds on any architecture.

https://github.com/llvm/llvm-project/pull/122248