[all-commits] [llvm/llvm-project] d69ccf: [RISCV] Combine shuffle of shuffles to a single sh...

[Ryan Buchner via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d69ccf3b34e7ca8fa42e4c078f026b6e898e2c90
      https://github.com/llvm/llvm-project/commit/d69ccf3b34e7ca8fa42e4c078f026b6e898e2c90
  Author: Ryan Buchner <rbuchner at qti.qualcomm.com>
  Date:   2026-02-09 (Mon, 09 Feb 2026)

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

  Log Message:
  -----------
  [RISCV] Combine shuffle of shuffles to a single shuffle (#178095)

Compressing to a single shuffle doesn't remove any information and the backend can better apply specific optimizations to a single shuffle.

Addresses #176218.

---------

Co-authored-by: Luke Lau <luke_lau at igalia.com>



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