[all-commits] [llvm/llvm-project] 02e316: [DirectX] legalize memset (#136244)

[Farzon Lotfi via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 02e316cf8c9c73aad580e8c0d1b3b691567601ca
      https://github.com/llvm/llvm-project/commit/02e316cf8c9c73aad580e8c0d1b3b691567601ca
  Author: Farzon Lotfi <farzonlotfi at microsoft.com>
  Date:   2025-04-30 (Wed, 30 Apr 2025)

  Changed paths:
    M llvm/lib/Target/DirectX/DXILLegalizePass.cpp
    M llvm/lib/Target/DirectX/DirectXTargetMachine.cpp
    A llvm/test/CodeGen/DirectX/legalize-memset.ll
    M llvm/test/CodeGen/DirectX/llc-pipeline.ll

  Log Message:
  -----------
  [DirectX] legalize memset (#136244)

fixes #136243

This change converts memset into a series of geps and stores It is
intentionally limited to memsets of fixed size It also converts the byte
stores to type stores.
DXIL does not support i8 plus this reduces the total number of gep and
store instructions.
This change also moves DXILFinalizeLinkage to run after Legalization to
clean up any dead intrinsic definitions.



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