[llvm] [X86][LoopVectorize] Enable MaximizeBandwidth by default on X86 with generic split cost floor (PR #201666)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

It would probably be good to share some data on the performance impact on a few different X86 systems. IIRC there were some regressions on other targets when enabling this

https://github.com/llvm/llvm-project/pull/201666