[PATCH] D88167: [LoopDeletion] Forget loop before setting values to undef

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: asbirlea, reames, mkazantsev.
Herald added subscribers: javed.absar, hiraditya.
Herald added a project: LLVM.
fhahn requested review of this revision.

After D71539 <https://reviews.llvm.org/D71539>, we need to forget the loop before setting the incoming
values of phi nodes in exit blocks, because we are looking through those
phi nodes now and the SCEV expression could depend on the loop phi. If
we update the phi nodes before forgetting the loop, we miss those users
during invalidation.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D88167

Files:
  llvm/lib/Transforms/Scalar/LoopDeletion.cpp
  llvm/lib/Transforms/Utils/LoopUtils.cpp
  llvm/test/Transforms/LoopDeletion/update-scev.ll

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