mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-14 23:36:26 +00:00
2f41fa387d
Summary: Previously, we removed the special handling for the code object version global. I erroneously thought that this meant we cold get rid of this weird `-Xclang` option. However, this also emits an LLVM IR module flag, which will then cause linking issues.
272 lines
11 KiB
CMake
272 lines
11 KiB
CMake
set(LIBOMPTARGET_BUILD_DEVICERTL_BCLIB TRUE CACHE BOOL
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"Can be set to false to disable building this library.")
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if (NOT LIBOMPTARGET_BUILD_DEVICERTL_BCLIB)
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message(STATUS "Not building DeviceRTL: Disabled by LIBOMPTARGET_BUILD_DEVICERTL_BCLIB")
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return()
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endif()
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# Check to ensure the host system is a supported host architecture.
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if(NOT ${CMAKE_SIZEOF_VOID_P} EQUAL "8")
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message(STATUS "Not building DeviceRTL: Runtime does not support 32-bit hosts")
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return()
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endif()
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if (LLVM_DIR)
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# Builds that use pre-installed LLVM have LLVM_DIR set.
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# A standalone or LLVM_ENABLE_RUNTIMES=openmp build takes this route
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find_program(CLANG_TOOL clang PATHS ${LLVM_TOOLS_BINARY_DIR} NO_DEFAULT_PATH)
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find_program(PACKAGER_TOOL clang-offload-packager PATHS ${LLVM_TOOLS_BINARY_DIR} NO_DEFAULT_PATH)
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find_program(LINK_TOOL llvm-link PATHS ${LLVM_TOOLS_BINARY_DIR} NO_DEFAULT_PATH)
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find_program(OPT_TOOL opt PATHS ${LLVM_TOOLS_BINARY_DIR} NO_DEFAULT_PATH)
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if ((NOT CLANG_TOOL) OR (NOT LINK_TOOL) OR (NOT OPT_TOOL) OR (NOT PACKAGER_TOOL))
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message(STATUS "Not building DeviceRTL. Missing clang: ${CLANG_TOOL}, llvm-link: ${LINK_TOOL}, opt: ${OPT_TOOL}, or clang-offload-packager: ${PACKAGER_TOOL}")
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return()
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else()
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message(STATUS "Building DeviceRTL. Using clang: ${CLANG_TOOL}, llvm-link: ${LINK_TOOL} and opt: ${OPT_TOOL}")
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endif()
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elseif (LLVM_TOOL_CLANG_BUILD AND NOT CMAKE_CROSSCOMPILING AND NOT OPENMP_STANDALONE_BUILD)
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# LLVM in-tree builds may use CMake target names to discover the tools.
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# A LLVM_ENABLE_PROJECTS=openmp build takes this route
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set(CLANG_TOOL $<TARGET_FILE:clang>)
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set(PACKAGER_TOOL $<TARGET_FILE:clang-offload-packager>)
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set(LINK_TOOL $<TARGET_FILE:llvm-link>)
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set(OPT_TOOL $<TARGET_FILE:opt>)
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message(STATUS "Building DeviceRTL. Using clang from in-tree build")
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else()
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message(STATUS "Not building DeviceRTL. No appropriate clang found")
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return()
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endif()
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set(devicertl_base_directory ${CMAKE_CURRENT_SOURCE_DIR})
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set(include_directory ${devicertl_base_directory}/include)
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set(source_directory ${devicertl_base_directory}/src)
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set(include_files
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${include_directory}/Allocator.h
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${include_directory}/Configuration.h
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${include_directory}/Debug.h
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${include_directory}/Interface.h
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${include_directory}/LibC.h
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${include_directory}/Mapping.h
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${include_directory}/Profiling.h
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${include_directory}/State.h
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${include_directory}/Synchronization.h
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${include_directory}/DeviceTypes.h
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${include_directory}/DeviceUtils.h
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${include_directory}/Workshare.h
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)
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set(src_files
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${source_directory}/Allocator.cpp
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${source_directory}/Configuration.cpp
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${source_directory}/Debug.cpp
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${source_directory}/Kernel.cpp
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${source_directory}/LibC.cpp
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${source_directory}/Mapping.cpp
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${source_directory}/Misc.cpp
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${source_directory}/Parallelism.cpp
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${source_directory}/Profiling.cpp
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${source_directory}/Reduction.cpp
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${source_directory}/State.cpp
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${source_directory}/Synchronization.cpp
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${source_directory}/Tasking.cpp
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${source_directory}/DeviceUtils.cpp
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${source_directory}/Workshare.cpp
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)
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# We disable the slp vectorizer during the runtime optimization to avoid
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# vectorized accesses to the shared state. Generally, those are "good" but
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# the optimizer pipeline (esp. Attributor) does not fully support vectorized
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# instructions yet and we end up missing out on way more important constant
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# propagation. That said, we will run the vectorizer again after the runtime
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# has been linked into the user program.
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set(clang_opt_flags -O3 -mllvm -openmp-opt-disable -DSHARED_SCRATCHPAD_SIZE=512 -mllvm -vectorize-slp=false )
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set(link_opt_flags -O3 -openmp-opt-disable -attributor-enable=module -vectorize-slp=false )
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set(link_export_flag -passes=internalize -internalize-public-api-file=${source_directory}/exports)
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# If the user built with the GPU C library enabled we will use that instead.
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if(${LIBOMPTARGET_GPU_LIBC_SUPPORT})
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list(APPEND clang_opt_flags -DOMPTARGET_HAS_LIBC)
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endif()
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# Prepend -I to each list element
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set (LIBOMPTARGET_LLVM_INCLUDE_DIRS_DEVICERTL "${LIBOMPTARGET_LLVM_INCLUDE_DIRS}")
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list(TRANSFORM LIBOMPTARGET_LLVM_INCLUDE_DIRS_DEVICERTL PREPEND "-I")
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# Set flags for LLVM Bitcode compilation.
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set(bc_flags -c -flto -std=c++17 -fvisibility=hidden
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${clang_opt_flags} -nogpulib -nostdlibinc
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-fno-rtti -fno-exceptions -fconvergent-functions
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-Wno-unknown-cuda-version
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-DOMPTARGET_DEVICE_RUNTIME
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-I${include_directory}
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-I${devicertl_base_directory}/../include
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-I${devicertl_base_directory}/../../libc
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${LIBOMPTARGET_LLVM_INCLUDE_DIRS_DEVICERTL}
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)
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# first create an object target
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add_library(omptarget.devicertl.all_objs OBJECT IMPORTED)
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function(compileDeviceRTLLibrary target_name target_triple)
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set(target_bc_flags ${ARGN})
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set(bc_files "")
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foreach(src ${src_files})
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get_filename_component(infile ${src} ABSOLUTE)
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get_filename_component(outfile ${src} NAME)
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set(outfile "${outfile}-${target_name}.bc")
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set(depfile "${outfile}.d")
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# Passing an empty CPU to -march= suppressed target specific metadata.
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add_custom_command(OUTPUT ${outfile}
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COMMAND ${CLANG_TOOL}
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${bc_flags}
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--target=${target_triple}
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${target_bc_flags}
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-MD -MF ${depfile}
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${infile} -o ${outfile}
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DEPENDS ${infile}
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DEPFILE ${depfile}
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COMMENT "Building LLVM bitcode ${outfile}"
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VERBATIM
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)
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if(TARGET clang)
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# Add a file-level dependency to ensure that clang is up-to-date.
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# By default, add_custom_command only builds clang if the
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# executable is missing.
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add_custom_command(OUTPUT ${outfile}
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DEPENDS clang
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APPEND
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)
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endif()
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set_property(DIRECTORY APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES ${outfile})
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list(APPEND bc_files ${outfile})
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endforeach()
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set(bclib_name "libomptarget-${target_name}.bc")
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# Link to a bitcode library.
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add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/linked_${bclib_name}
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COMMAND ${LINK_TOOL}
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-o ${CMAKE_CURRENT_BINARY_DIR}/linked_${bclib_name} ${bc_files}
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DEPENDS ${bc_files}
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COMMENT "Linking LLVM bitcode ${bclib_name}"
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)
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if(TARGET llvm-link)
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add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/linked_${bclib_name}
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DEPENDS llvm-link
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APPEND)
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endif()
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add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/internalized_${bclib_name}
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COMMAND ${OPT_TOOL} ${link_export_flag} ${CMAKE_CURRENT_BINARY_DIR}/linked_${bclib_name}
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-o ${CMAKE_CURRENT_BINARY_DIR}/internalized_${bclib_name}
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DEPENDS ${source_directory}/exports ${CMAKE_CURRENT_BINARY_DIR}/linked_${bclib_name}
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COMMENT "Internalizing LLVM bitcode ${bclib_name}"
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)
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if(TARGET opt)
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add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/internalized_${bclib_name}
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DEPENDS opt
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APPEND)
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endif()
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add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${bclib_name}
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COMMAND ${OPT_TOOL} ${link_opt_flags} ${CMAKE_CURRENT_BINARY_DIR}/internalized_${bclib_name}
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-o ${CMAKE_CURRENT_BINARY_DIR}/${bclib_name}
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DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/internalized_${bclib_name}
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COMMENT "Optimizing LLVM bitcode ${bclib_name}"
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)
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if(TARGET opt)
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add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${bclib_name}
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DEPENDS opt
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APPEND)
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endif()
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set(bclib_target_name "omptarget-${target_name}-bc")
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add_custom_target(${bclib_target_name} DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${bclib_name})
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# Copy library to destination.
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add_custom_command(TARGET ${bclib_target_name} POST_BUILD
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COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_BINARY_DIR}/${bclib_name}
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${LIBOMPTARGET_LIBRARY_DIR})
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add_dependencies(omptarget.devicertl.${target_name} ${bclib_target_name})
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set_property(DIRECTORY APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES ${bclib_name} ${LIBOMPTARGET_LIBRARY_DIR}/${bclib_name})
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# Install bitcode library under the lib destination folder.
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install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${bclib_name} DESTINATION "${OFFLOAD_INSTALL_LIBDIR}")
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set(target_feature "")
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if("${target_triple}" STREQUAL "nvptx64-nvidia-cuda")
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set(target_feature "feature=+ptx63")
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endif()
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# Package the bitcode in the bitcode and embed it in an ELF for the static library
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add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/packaged_${bclib_name}
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COMMAND ${PACKAGER_TOOL} -o ${CMAKE_CURRENT_BINARY_DIR}/packaged_${bclib_name}
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"--image=file=${CMAKE_CURRENT_BINARY_DIR}/${bclib_name},${target_feature},triple=${target_triple},arch=generic,kind=openmp"
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DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${bclib_name}
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COMMENT "Packaging LLVM offloading binary ${bclib_name}.out"
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)
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if(TARGET clang-offload-packager)
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add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/packaged_${bclib_name}
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DEPENDS clang-offload-packager
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APPEND)
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endif()
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set(output_name "${CMAKE_CURRENT_BINARY_DIR}/devicertl-${target_name}.o")
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add_custom_command(OUTPUT ${output_name}
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COMMAND ${CLANG_TOOL} --std=c++17 -c -nostdlib
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-Xclang -fembed-offload-object=${CMAKE_CURRENT_BINARY_DIR}/packaged_${bclib_name}
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-o ${output_name}
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${source_directory}/Stub.cpp
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DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/packaged_${bclib_name} ${source_directory}/Stub.cpp
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COMMENT "Embedding LLVM offloading binary in devicertl-${target_name}.o"
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VERBATIM
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)
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if(TARGET clang)
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add_custom_command(OUTPUT ${output_name}
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DEPENDS clang
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APPEND)
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endif()
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set_property(DIRECTORY APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES ${output_name})
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set_property(TARGET omptarget.devicertl.all_objs APPEND PROPERTY IMPORTED_OBJECTS ${output_name})
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if (CMAKE_EXPORT_COMPILE_COMMANDS)
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set(ide_target_name omptarget-ide-${target_name})
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add_library(${ide_target_name} STATIC EXCLUDE_FROM_ALL ${src_files})
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target_compile_options(${ide_target_name} PRIVATE
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-fvisibility=hidden --target=${target_triple}
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-nogpulib -nostdlibinc -Wno-unknown-cuda-version
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)
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target_compile_definitions(${ide_target_name} PRIVATE SHARED_SCRATCHPAD_SIZE=512)
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target_include_directories(${ide_target_name} PRIVATE
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${include_directory}
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${devicertl_base_directory}/../../libc
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${devicertl_base_directory}/../include
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${LIBOMPTARGET_LLVM_INCLUDE_DIRS}
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)
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install(TARGETS ${ide_target_name} EXCLUDE_FROM_ALL)
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endif()
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endfunction()
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add_custom_target(omptarget.devicertl.amdgpu)
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compileDeviceRTLLibrary(amdgpu amdgcn-amd-amdhsa -Xclang -mcode-object-version=none)
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add_custom_target(omptarget.devicertl.nvptx)
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compileDeviceRTLLibrary(nvptx nvptx64-nvidia-cuda --cuda-feature=+ptx63)
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# Archive all the object files generated above into a static library
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add_library(omptarget.devicertl STATIC)
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set_target_properties(omptarget.devicertl PROPERTIES
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ARCHIVE_OUTPUT_DIRECTORY "${LIBOMPTARGET_LLVM_LIBRARY_INTDIR}"
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LINKER_LANGUAGE CXX
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)
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target_link_libraries(omptarget.devicertl PRIVATE omptarget.devicertl.all_objs)
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install(TARGETS omptarget.devicertl ARCHIVE DESTINATION ${OFFLOAD_INSTALL_LIBDIR})
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