[all-commits] [llvm/llvm-project] 2b125e: [LV] Don't pass loop preheader to getOrCreateVecto...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2b125e899b6414ca55f9d3e5989450e33d28ab7c
      https://github.com/llvm/llvm-project/commit/2b125e899b6414ca55f9d3e5989450e33d28ab7c
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2024-09-25 (Wed, 25 Sep 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp

  Log Message:
  -----------
  [LV] Don't pass loop preheader to getOrCreateVectorTripCount (NFCI).

The vector trip count must already be created when fixupIVUsers is
called. Don't pass the vector preheader there and delay retrieving the
vector loop header. This ensures we are re-using the already computed
trip count. Computing the trip count from scratch would not be correct,
as the IR may not be in a valid state yet.



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