llvm-project

ffd0f5fd - [LV] Remove unneeded ILV::LoopScalarPreHeader (NFC).

[LV] Remove unneeded ILV::LoopScalarPreHeader (NFC). Follow-up suggested in https://github.com/llvm/llvm-project/pull/153643. Remove some more global state by directly returning the scalar preheader from createScalarPreheader.