[PATCH] D126099: [SLP] Fix crash in reorderBottomToTop().

[Vasileios Porpodas via Phabricator via llvm-commits]

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The crash is caused by incorrect order set by reorderBottomToTop(), which
happens when it is reordering a TreeEntry which has a user that has already been
reordered earlier. Please see the detailed description in the lit test.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D126099

Files:
  llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
  llvm/test/Transforms/SLPVectorizer/X86/reorder_with_reordered_users.ll

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