[PATCH] D45945: [LoopRotate] Fix incorrect SCEV invalidation in loop rotation

[Max Kazantsev via Phabricator via llvm-commits]

mkazantsev created this revision.
mkazantsev added reviewers: chandlerc, sanjoy, reames, hfinkel.
Herald added a subscriber: javed.absar.

LoopRotate only invalidates innermost loops while the changes that it makes may
also affert any of this parents. It is possible after the patch With patch https://reviews.llvm.org/rL329047,
SCEV becomes much smarter about calculation of exit counts for outer loops, so
we cannot assume that they are not affected.


https://reviews.llvm.org/D45945

Files:
  lib/Transforms/Utils/LoopRotationUtils.cpp
  test/Transforms/LoopRotate/pr37205.ll

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