[PATCH] D43237: [LoopInterchange] Allow some loops with PHI nodes in the exit block.

[Florian Hahn via Phabricator via llvm-commits]

fhahn updated this revision to Diff 138244.
fhahn edited the summary of this revision.
fhahn added a comment.

Made check slightly more direct. I went ahead and limited it loop latches with a single predecessor, because we need additional logic to update the PHI nodes in that case. The LI tests also changed a bit after https://reviews.llvm.org/D35430, so I updated the tests this patch touches.


https://reviews.llvm.org/D43237

Files:
  lib/Transforms/Scalar/LoopInterchange.cpp
  test/Transforms/LoopInterchange/current-limitations-lcssa.ll
  test/Transforms/LoopInterchange/lcssa.ll
  test/Transforms/LoopInterchange/reductions.ll

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