[PATCH] D45279: [LoopInterchange] Use LoopInfo::getExitBlock() instead of manual impl.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: efriedma, davide, karthikthecool.

This also means we have to check if the latch is the exiting block now, as `transform` expects the latches to be the exiting blocks too.

https://bugs.llvm.org/show_bug.cgi?id=36586


https://reviews.llvm.org/D45279

Files:
  lib/Transforms/Scalar/LoopInterchange.cpp
  test/Transforms/LoopInterchange/currentLimitation.ll

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