[all-commits] [llvm/llvm-project] 0e8cda: [SelectionDAG] Fold extracts spanning concat opera...

[Krzysztof Drewniak via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0e8cdad82e52063578ef5fe02e1313c186ce988b
      https://github.com/llvm/llvm-project/commit/0e8cdad82e52063578ef5fe02e1313c186ce988b
  Author: Krzysztof Drewniak <Krzysztof.Drewniak at amd.com>
  Date:   2026-06-10 (Wed, 10 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/AArch64/sve-load-store-legalisation.ll
    M llvm/test/CodeGen/AMDGPU/bf16.ll
    M llvm/test/CodeGen/RISCV/rvv/vector-interleave.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 (#200936)

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>

---------

Co-authored-by: OpenAI Codex <codex at openai.com>



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications