[PATCH] D115268: [SLP]Fix comparator for cmp instruction vectorization.

[Alexey Bataev via Phabricator via llvm-commits]

ABataev created this revision.
ABataev added reviewers: RKSimon, anton-afanasyev, dtemirbulatov, vporpo.
Herald added a subscriber: hiraditya.
ABataev requested review of this revision.
Herald added a project: LLVM.

The comparator for the sort functions should provide strict weak
ordering relation between parameters. Current solution causes compiler
crash with some standard c++ library implementations, because it does
not meet this criteria. Tried to fix it + it improves the iverall
vectorization result.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D115268

Files:
  llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
  llvm/test/Transforms/SLPVectorizer/X86/used-reduced-op.ll
  llvm/test/Transforms/SLPVectorizer/X86/vectorize-cmps.ll

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