[PATCH] D111363: [VectorCombine] Scalarize vector GEP if that isn't more costly

[Roman Lebedev via Phabricator via llvm-commits]

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As noted in https://reviews.llvm.org/D111220#3048397,
after masked memory intrinsic has been scalarized,
we may have an opportunity to improve the IR,
because the pointers were scalarized via `extractelement`,
but we might be able to fold them into `getelementptr`'s.

We'd also need to schedule another VectorCombine run
somewhere after ScalarizeMaskedMemIntrin in backend IR phase.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D111363

Files:
  llvm/lib/Transforms/Vectorize/VectorCombine.cpp
  llvm/test/Transforms/VectorCombine/X86/scalarize-vector-gep.ll

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