[all-commits] [llvm/llvm-project] f499ec: [RISCV] Add caching to the gather/scatter to strid...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f499ec6b3d138e6b5643f5c848c38d61462e063b
      https://github.com/llvm/llvm-project/commit/f499ec6b3d138e6b5643f5c848c38d61462e063b
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2022-05-11 (Wed, 11 May 2022)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVGatherScatterLowering.cpp
    M llvm/test/CodeGen/RISCV/rvv/fixed-vector-strided-load-store.ll

  Log Message:
  -----------
  [RISCV] Add caching to the gather/scatter to strided load/store conversion.

If we have multiple gather/scatter instructions using the same the
same strided address we would scalarize it multiple times. I guess
a later pass cleans this up, but I don't know if that's guaranteed.

This patch adds a cache to remember the scalarization we already
created for a previous gather/scatter.

Reviewed By: frasercrmck

Differential Revision: https://reviews.llvm.org/D125326