[all-commits] [llvm/llvm-project] 6d8834: [IA] Add support for [de]interleave{4, 6, 8} (#141512)

[Luke Lau via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6d88343662c25e2b06974da9987d52f23a120b51
      https://github.com/llvm/llvm-project/commit/6d88343662c25e2b06974da9987d52f23a120b51
  Author: Luke Lau <luke at igalia.com>
  Date:   2025-05-28 (Wed, 28 May 2025)

  Changed paths:
    M llvm/lib/CodeGen/InterleavedAccessPass.cpp
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-deinterleave-load.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-interleave-store.ll
    M llvm/test/CodeGen/RISCV/rvv/vector-deinterleave-load.ll
    M llvm/test/CodeGen/RISCV/rvv/vector-interleave-store.ll
    M llvm/test/Transforms/InterleavedAccess/RISCV/interleaved-accesses.ll

  Log Message:
  -----------
  [IA] Add support for [de]interleave{4,6,8} (#141512)

This teaches the interleaved access pass to the lower the intrinsics for
factors 4,6 and 8 added in #139893 to target intrinsics.

Because factors 4 and 8 could either have been recursively
[de]interleaved or have just been a single intrinsic, we need to check
that it's the former it before reshuffling around the values via
interleaveLeafValues.

After this patch, we can teach the loop vectorizer to emit a single
interleave intrinsic for factors 2 through to 8, and then we can remove
the recursive interleaving matching in interleaved access pass.



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