[all-commits] [llvm/llvm-project] 4a66ba: [IA] Support deinterleave intrinsics w/ fewer than...

[Philip Reames via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4a66ba2a4d9b0b95051e807f0659991a7e529874
      https://github.com/llvm/llvm-project/commit/4a66ba2a4d9b0b95051e807f0659991a7e529874
  Author: Philip Reames <preames at rivosinc.com>
  Date:   2025-07-09 (Wed, 09 Jul 2025)

  Changed paths:
    M llvm/include/llvm/CodeGen/TargetLowering.h
    M llvm/lib/CodeGen/InterleavedAccessPass.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.h
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/lib/Target/RISCV/RISCVISelLowering.h
    M llvm/test/CodeGen/RISCV/rvv/vector-deinterleave-load.ll

  Log Message:
  -----------
  [IA] Support deinterleave intrinsics w/ fewer than N extracts (#147572)

For the fixed vector cases, we already support this, but the
deinterleave intrinsic cases (primary used by scalable vectors) didn't.
Supporting it requires plumbing through the Factor separately from the
extracts, as there can now be fewer extracts than the Factor. Note that
the fixed vector path handles this slightly differently - it uses the
shuffle and indices scheme to achieve the same thing.



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