[all-commits] [llvm/llvm-project] ac2bd8: [Clang] Remove 3-element vector load and store spe...

[Shilei Tian via All-commits]

  Branch: refs/heads/users/shiltian/no-3-vec-load-store-hack
  Home:   https://github.com/llvm/llvm-project
  Commit: ac2bd8cd5d9faf6c9a9ae7846b4110ade92d2f40
      https://github.com/llvm/llvm-project/commit/ac2bd8cd5d9faf6c9a9ae7846b4110ade92d2f40
  Author: Shilei Tian <i at tianshilei.me>
  Date:   2025-01-10 (Fri, 10 Jan 2025)

  Changed paths:
    M clang/include/clang/Basic/CodeGenOptions.def
    M clang/include/clang/Basic/LangOptions.def
    M clang/include/clang/Driver/Options.td
    M clang/lib/Basic/LangOptions.cpp
    M clang/lib/CodeGen/ABIInfo.cpp
    M clang/lib/CodeGen/ABIInfo.h
    M clang/lib/CodeGen/CGExpr.cpp
    M clang/lib/CodeGen/Targets/AMDGPU.cpp
    M clang/test/CodeGenCXX/matrix-vector-bit-int.cpp
    M clang/test/CodeGenOpenCL/amdgpu-alignment.cl
    M clang/test/CodeGenOpenCL/preserve_vec3.cl

  Log Message:
  -----------
  [Clang] Remove 3-element vector load and store special handling

Clang uses a long-time special handling of the case where  3 element vector loads
and stores are performed as 4 element, and then a shufflevector is used to extract
the used elements. Odd sized vector codegen should now work reasonably well.

This patch removes this special handling, as well as the compiler argument
`-fpreserve-vec3-type`.



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