[all-commits] [llvm/llvm-project] b86255: [Offload][libsycl][clang-sycl-linker] Simplify SYC...

[Yury Plyakhin via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b862554a70eeb9a8315f45406a7e13c771af1eb7
      https://github.com/llvm/llvm-project/commit/b862554a70eeb9a8315f45406a7e13c771af1eb7
  Author: Yury Plyakhin <yury.plyakhin at intel.com>
  Date:   2026-04-27 (Mon, 27 Apr 2026)

  Changed paths:
    M clang/test/Driver/linker-wrapper-image.c
    M clang/tools/clang-sycl-linker/ClangSYCLLinker.cpp
    M libsycl/src/detail/device_binary_structures.hpp
    M libsycl/src/detail/device_image_wrapper.cpp
    M libsycl/src/detail/device_image_wrapper.hpp
    M libsycl/src/detail/program_manager.cpp
    M libsycl/src/detail/program_manager.hpp
    M llvm/include/llvm/Frontend/Offloading/Utility.h
    M llvm/lib/Frontend/Offloading/OffloadWrapper.cpp
    M llvm/lib/Frontend/Offloading/Utility.cpp

  Log Message:
  -----------
  [Offload][libsycl][clang-sycl-linker] Simplify SYCL Offload wrapping (#193876)

Replace the __sycl_tgt_bin_desc/__sycl_tgt_device_image-based fat binary
registration with a simpler OffloadBinary-native approach:

- __sycl_register_lib/__sycl_unregister_lib now take (BinaryStart, Size)
instead of a __sycl_tgt_bin_desc pointer; __sycl_unregister_lib only
needs BinaryStart since the runtime looks up the binary by its start
address.
- OffloadWrapper's SYCL wrapping is significantly simplified: the
__tgt_bin_desc/__tgt_device_image structs and the descriptor
construction code are replaced by a single embedded OffloadBinary blob
passed directly to the register/unregister entry points.
- clang-sycl-linker generates a single OffloadBinary, which contains
multiple images.
- ProgramAndKernelManager::registerFatBin parses the blob via
OffloadBinary::create, keying MDeviceImageManagers by BinaryStart to
eliminate the reparse on unregister.
- DeviceImageManager owns std::unique_ptr<OffloadBinary> instead of
borrowing a __sycl_tgt_device_image pointer; getRawData renamed to
getOffloadBinary.
- Introduce forEachSymbol and SymbolTable serialization
(writeSymbolTable/ SymbolTableHeader/SymbolTableEntry) in Utility.h to
expose the kernel symbol table embedded in the OffloadBinary "symbols"
section for consumption by the SYCL runtime.
- device_binary_structures.hpp reduced to DeviceBinaryTripleSPIRV64.

Co-Authored-By: Claude



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