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

[Alina Sbirlea via Phabricator via cfe-commits]

asbirlea created this revision.
asbirlea added reviewers: kuhar, dblaikie, NutshellySima.
Herald added subscribers: cfe-commits, hiraditya.
Herald added a project: clang.
asbirlea added a comment.
asbirlea added a parent revision: D77167: [GraphDiff] Extend GraphDiff to track a list of updates..

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.


This replaces the ChildrenGetter inside the DominatorTree with
GraphTraits over a GraphDiff object, an object which encapsulated the
view of the previous CFG.
This also simplifies the extentions in clang which use DominatorTree, as
GraphDiff also filters nullptrs.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D77341

Files:
  clang/include/clang/Analysis/Analyses/Dominators.h
  llvm/include/llvm/IR/CFGDiff.h
  llvm/include/llvm/IR/Dominators.h
  llvm/include/llvm/Support/GenericDomTree.h
  llvm/include/llvm/Support/GenericDomTreeConstruction.h
  llvm/lib/IR/Dominators.cpp

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