[all-commits] [llvm/llvm-project] 6af641: [RISCV] Add a tune feature to disable stripping W ...

[Wang Pengcheng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6af6416e89de1f4656a145c4843226b468718434
      https://github.com/llvm/llvm-project/commit/6af6416e89de1f4656a145c4843226b468718434
  Author: Wang Pengcheng <wangpengcheng.pp at bytedance.com>
  Date:   2024-03-25 (Mon, 25 Mar 2024)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVFeatures.td
    M llvm/lib/Target/RISCV/RISCVOptWInstrs.cpp
    A llvm/test/CodeGen/RISCV/strip-w-suffix.ll

  Log Message:
  -----------
  [RISCV] Add a tune feature to disable stripping W suffix (#86255)

We have a hidden option to disable it, but I'd like to make it a
tune feature.

For some implementations, instructions with W suffix would be less
costly as they only perform on 32 bits data. Though we may lose some
chances to compress.



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