[PATCH] D102615: [LoopDeletion] Break backedge if we can prove that the loop is exited on 1st iteration (try 3)

[Max Kazantsev via Phabricator via llvm-commits]

mkazantsev updated this revision to Diff 352678.
mkazantsev added a comment.

Reworked using InstSimplify. It's good enough for my case. Let's hope that at least this has acceptable CT overhead.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D102615/new/

https://reviews.llvm.org/D102615

Files:
  llvm/lib/Transforms/Scalar/LoopDeletion.cpp
  llvm/test/Transforms/LoopDeletion/eval_first_iteration.ll
  llvm/test/Transforms/LoopDeletion/unreachable-loops.ll
  llvm/test/Transforms/LoopDeletion/zero-btc.ll

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