[PATCH] D153014: Deduplication of cyclic PHI nodes

[Marek Sedláček via Phabricator via llvm-commits]

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The EliminateDuplicatePHINodes function used in simplifycfg pass does not handle cyclic phis. This patch adds detection for such phis and can be constrained using the deduplicate-phi-max-depth option.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D153014

Files:
  llvm/lib/Transforms/Utils/Local.cpp
  llvm/unittests/Transforms/Utils/LocalTest.cpp

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