[all-commits] [llvm/llvm-project] c09535: [SelectionDAG] Fold extracts spanning concat operands

[Krzysztof Drewniak via All-commits]

  Branch: refs/heads/users/krzysz00/extract-concat-dagcombine
  Home:   https://github.com/llvm/llvm-project
  Commit: c09535ffe7de7045bf217245d19d9ab49fc918b6
      https://github.com/llvm/llvm-project/commit/c09535ffe7de7045bf217245d19d9ab49fc918b6
  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/AArch64/fixed-vector-interleave.ll
    M llvm/test/CodeGen/AArch64/sve-fixed-vector-llrint.ll
    M llvm/test/CodeGen/AArch64/sve-fixed-vector-lrint.ll
    M llvm/test/CodeGen/AMDGPU/bf16.ll
    M llvm/test/CodeGen/X86/combine-pmuldq.ll
    M llvm/test/CodeGen/X86/ifma-combine-vpmadd52.ll
    M llvm/test/CodeGen/X86/madd.ll
    M llvm/test/CodeGen/X86/pmaddubsw.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i16-stride-6.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i32-stride-6.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i8-stride-6.ll
    M llvm/test/CodeGen/X86/vector-replicaton-i1-mask.ll
    M llvm/test/CodeGen/X86/widen_fadd.ll
    M llvm/test/CodeGen/X86/widen_fdiv.ll
    M llvm/test/CodeGen/X86/widen_fmul.ll
    M llvm/test/CodeGen/X86/widen_fsub.ll

  Log Message:
  -----------
  [SelectionDAG] Fold extracts spanning concat operands

Factor the extract_subvector-of-CONCAT_VECTORS logic and handle
extracts that cover multiple whole concat operands by rebuilding a
smaller concat directly.

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

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


  Commit: d1128fd9ba0b5ca1be21d54d065d8f2b41650943
      https://github.com/llvm/llvm-project/commit/d1128fd9ba0b5ca1be21d54d065d8f2b41650943
  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

  Log Message:
  -----------
  Make this work on scalable vectors


  Commit: 9b19bab0e13f554355c1a73c2af486c7ff83ce74
      https://github.com/llvm/llvm-project/commit/9b19bab0e13f554355c1a73c2af486c7ff83ce74
  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/AArch64/sve-load-store-legalisation.ll
    M llvm/test/CodeGen/RISCV/rvv/vector-interleave.ll

  Log Message:
  -----------
  scalable vector test updates


Compare: https://github.com/llvm/llvm-project/compare/107f26320580...9b19bab0e13f

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