[all-commits] [llvm/llvm-project] 694292: [DAG] combineConcatVectorOfScalars - stop always c...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 69429276098df2f2cf67dcab1c96ce8f56280c11
      https://github.com/llvm/llvm-project/commit/69429276098df2f2cf67dcab1c96ce8f56280c11
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2024-03-21 (Thu, 21 Mar 2024)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

  Log Message:
  -----------
  [DAG] combineConcatVectorOfScalars - stop always creating UNDEF nodes. NFC.

Noticed in debug logs - most calls to visitVECTOR_SHUFFLE resulted into wasteful UNDEF node creations, despite almost never being used.



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