[all-commits] [llvm/llvm-project] c7209c: [LV] Assert that there's a resume phi for epilogue...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c7209cbb8be7a3c658137679d760ce9d70baded8
      https://github.com/llvm/llvm-project/commit/c7209cbb8be7a3c658137679d760ce9d70baded8
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2024-05-02 (Thu, 02 May 2024)

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

  Log Message:
  -----------
  [LV] Assert that there's a resume phi for epilogue loops (NFC).

This patch adds an assert to createAndCollectMergePhiForReduction to
make sure there is a resume phi when vectorizing the epilogue loop. This
is needed to set the resume value from the main vector loop.

This assertion guards against the issue caused the revert of
https://github.com/llvm/llvm-project/pull/78304.



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