[PATCH] D110613: [Taildup] Don't tail-duplicate loop header with multiple successors as its latches

[Kai Luo via Phabricator via llvm-commits]

lkail added a comment.

As reported in https://reviews.llvm.org/rGc93f93b2e3f28997f794265089fb8138dd5b5f13, we should implement a more general way to avoid adding quadratic edges in CFGs. For reducible graphs, I think we can simply check if `TailBB` is loop header.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D110613/new/

https://reviews.llvm.org/D110613