[all-commits] [llvm/llvm-project] 52e4e5: [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: 52e4e592722e5223c3668bd3f8b396672f945ba4
      https://github.com/llvm/llvm-project/commit/52e4e592722e5223c3668bd3f8b396672f945ba4
  Author: Krzysztof Drewniak <Krzysztof.Drewniak at amd.com>
  Date:   2026-06-09 (Tue, 09 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>


  Commit: cdae94b6fe57fcf6fbee56c5f9662684eaa7953e
      https://github.com/llvm/llvm-project/commit/cdae94b6fe57fcf6fbee56c5f9662684eaa7953e
  Author: Krzysztof Drewniak <Krzysztof.Drewniak at amd.com>
  Date:   2026-06-09 (Tue, 09 Jun 2026)

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

  Log Message:
  -----------
  Remove pointless checks


Compare: https://github.com/llvm/llvm-project/compare/cc83c1f553f9...cdae94b6fe57

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