[all-commits] [llvm/llvm-project] 02668f: [RISCV] Match single source deinterleave shuffles ...

[Philip Reames via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 02668f60a9b5c0d5b8b6e60b4e897f763ad59a91
      https://github.com/llvm/llvm-project/commit/02668f60a9b5c0d5b8b6e60b4e897f763ad59a91
  Author: Philip Reames <preames at rivosinc.com>
  Date:   2024-11-07 (Thu, 07 Nov 2024)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-deinterleave-load.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-shuffle-changes-length.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-shufflevector-vnsrl.ll
    M llvm/test/CodeGen/RISCV/rvv/vector-deinterleave-fixed.ll

  Log Message:
  -----------
  [RISCV] Match single source deinterleave shuffles for vnsrl (#114878)

We had previously only been matching the two source case where both
sources came from a wider source type. We can also match the single
source case - provided the result is m4 or smaller because we will need
a wider type to represent the source.

The main goal of this to ensure that vnsrl matching is robust to a
possible change in canonicalization for length changing shuffles that
I'm considering, but it has the nice effect of picking up a few cases we
missed along the way.



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