[PATCH] D77341: [DomTree] Replace ChildrenGetter with GraphTraits over GraphDiff.

[Alina Sbirlea via Phabricator via cfe-commits]

asbirlea added a comment.

I sent this out to get some general feedback, but I'd like to be able to simplify the fact that this is replacing a `for` over `ChildrenGetter` with a `for` over `children<type>(pair)`, plus 5 lines to set up the type and pair; one simplification is around getting the type inside `children` (`GraphDiffBBPair`) and another around having the BUI or not; for the latter I'm considering updating a few places such that BUI is never nullptr.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D77341/new/

https://reviews.llvm.org/D77341