[all-commits] [llvm/llvm-project] 901ac6: [RISCV] Use ri.vzip2{a, b} for interleave2 if avail...

[Philip Reames via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 901ac60db7d864c79aa34d93fc46f2635e3afd50
      https://github.com/llvm/llvm-project/commit/901ac60db7d864c79aa34d93fc46f2635e3afd50
  Author: Philip Reames <preames at rivosinc.com>
  Date:   2025-04-22 (Tue, 22 Apr 2025)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/lib/Target/RISCV/RISCVISelLowering.h
    M llvm/lib/Target/RISCV/RISCVInstrInfoXRivos.td
    M llvm/test/CodeGen/RISCV/rvv/vector-interleave.ll

  Log Message:
  -----------
  [RISCV] Use ri.vzip2{a,b} for interleave2 if available (#136364)

If XRivosVizip is available, the ri.vzip2a and ri.vzip2b instructions
can be used perform a interleave shuffle. This patch only effects the
intrinsic lowering (and thus scalable vectors). Fixed vectors go through
shuffle lowering and the zip2a (but not zip2b) case is already handled
there..



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