[PATCH] D93686: [LoopUnroll] Fix a crash

[Serguei Katkov via Phabricator via llvm-commits]

skatkov created this revision.
skatkov added reviewers: dmgreen, Meinersbur, etiotto, fhahn, efriedma, bmahjour.
Herald added subscribers: dantrushin, zzheng, hiraditya.
skatkov requested review of this revision.
Herald added a project: LLVM.

Loop peeling as a last step triggers loop simplification and this
can change the loop structure. As a result all cashed values like
latch branch becomes invalid.

Patch re-structure the code to take into account the possible
changes caused by peeling.


https://reviews.llvm.org/D93686

Files:
  llvm/lib/Transforms/Utils/LoopUnroll.cpp
  llvm/test/Transforms/LoopUnroll/unroll-after-peel.ll

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