[llvm] [LV] Vectorize conditional scalar assignments (PR #158088)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

> I will be doing some performance runs on AArch64 to figure out
the cost model, as we mostly regard vector selects as per-lane
instead of selecting the whole vector at once.

Did you already get a chance to run preliminary benchmarks? Would be very curious what the impact is, possibly for some microbenchmarks (https://github.com/llvm/llvm-test-suite/tree/main/MicroBenchmarks/LoopVectorization would be a good place)

https://github.com/llvm/llvm-project/pull/158088