[all-commits] [llvm/llvm-project] cc83c1: [SelectionDAG] Fold subvector inserts into concat ...

[Krzysztof Drewniak via All-commits]

  Branch: refs/heads/users/krzysz00/insert-concat-dagcombine
  Home:   https://github.com/llvm/llvm-project
  Commit: cc83c1f553f9ce142b24868913b868dc37c08888
      https://github.com/llvm/llvm-project/commit/cc83c1f553f9ce142b24868913b868dc37c08888
  Author: Krzysztof Drewniak <Krzysztof.Drewniak at amd.com>
  Date:   2026-06-05 (Fri, 05 Jun 2026)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/test/CodeGen/X86/vector-shuffle-combining-avx512bwvl.ll

  Log Message:
  -----------
  [SelectionDAG] Fold subvector inserts into concat operands

Push insert_subvector into the containing CONCAT_VECTORS operand when the insertion is wholly contained there.

AI note: an LLM generated the code and the test, I've read them

Co-Authored-By: OpenAI Codex <codex at openai.com>



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