[all-commits] [llvm/llvm-project] 721b8c: [RISCV] Model interleave2 and deinterleave2 costs ...

[renndong via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 721b8cdac4f6186f772257aa739cc3fe2470c2de
      https://github.com/llvm/llvm-project/commit/721b8cdac4f6186f772257aa739cc3fe2470c2de
  Author: renndong <liumingliang.dev at bytedance.com>
  Date:   2026-09-30 (Wed, 30 Sep 2026)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
    M llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h
    M llvm/test/Analysis/CostModel/RISCV/shuffle-interleave.ll

  Log Message:
  -----------
  [RISCV] Model interleave2 and deinterleave2 costs with Zvzip (#225752)

This PR extends the RISC-V TTI cost model to recognize
`llvm.vector.interleave2` and `llvm.vector.deinterleave2` when the Zvzip
extension is available.

The cost is computed based on the operand that holds the interleaved
data: the destination operand of `vzip.vv`, and the source operand of
`unzipe.v` or `unzipo.v`.

This is the first PR split out from #224991.

Assisted-By: Trae CLI (GPT-5)



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