[all-commits] [llvm/llvm-project] ac92dc: [RISCV] Lower fixed reverse vector_shuffles throug...

[Luke Lau via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ac92dcc7562ca1c0b1ee84bcc678738aefbe5c18
      https://github.com/llvm/llvm-project/commit/ac92dcc7562ca1c0b1ee84bcc678738aefbe5c18
  Author: Luke Lau <luke at igalia.com>
  Date:   2024-08-16 (Fri, 16 Aug 2024)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-shuffle-reverse.ll
    M llvm/test/CodeGen/RISCV/rvv/shuffle-reverse.ll

  Log Message:
  -----------
  [RISCV] Lower fixed reverse vector_shuffles through vector_reverse (#104461)

This teaches lowerVECTOR_REVERSE to handle fixed length vectors, and
then lowers reverse vector_shuffles through it.

The motiviation for this is to allow fixed length vectors to share a
potential optimization on vector_reverse in an upcoming patch (splitting
up LMUL > 1 vrgathers.vv)



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