[all-commits] [llvm/llvm-project] c18a3b: [DAG] Fold extract_subvector(insert_subvector(x, y, ...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c18a3b6bd30456305cf1b3d78ad5a805577388c1
      https://github.com/llvm/llvm-project/commit/c18a3b6bd30456305cf1b3d78ad5a805577388c1
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2024-04-16 (Tue, 16 Apr 2024)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/test/CodeGen/X86/any_extend_vector_inreg_of_broadcast.ll
    M llvm/test/CodeGen/X86/dpbusd.ll
    M llvm/test/CodeGen/X86/dpbusd_i4.ll
    M llvm/test/CodeGen/X86/vector-interleaved-load-i16-stride-3.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i8-stride-7.ll
    M llvm/test/CodeGen/X86/zero_extend_vector_inreg_of_broadcast.ll

  Log Message:
  -----------
  [DAG] Fold extract_subvector(insert_subvector(x,y,c1),c2) --> extract_subvector(y,c2-c1) (#87925) (REAPPLIED)

If the extract_subvector is cheap, attempt to extract directly from an inserted subvector

Reapplied with a check to ensure we only attempt this for fixed vectors



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