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e3f85d297f
This allows one to cross-compile the header/object for a model in a setup where the compiler is built on a system that cannot host the AOT compiler. For example, if arm-hostable clang is desired, while the AOT Tensorflow compiler can cross-compile to arm, it can't currently run on arm. The only alternative in that scenario would be to cross-compile clang itself, but that gets complicated when trying to run tests after that. Differential Revision: https://reviews.llvm.org/D99992
56 lines
2.2 KiB
CMake
56 lines
2.2 KiB
CMake
# Ensure the ${model} is available at ${final_path}.
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#
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function(tfgetmodel model final_path)
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if (IS_ABSOLUTE ${model})
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set(${final_path} ${model} PARENT_SCOPE)
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else()
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set(${final_path}
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${CMAKE_CURRENT_SOURCE_DIR}/${model} PARENT_SCOPE)
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endif()
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endfunction()
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# Run the tensorflow compiler (saved_model_cli) on the saved model in the
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# ${model} directory, looking for the ${tag_set} tag set, and the SignatureDef
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# ${signature_def_key}.
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# Produce a pair of files called ${fname}.h and ${fname}.o in the
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# ${CMAKE_CURRENT_BINARY_DIR}. The generated header will define a C++ class
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# called ${cpp_class} - which may be a namespace-qualified class name.
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function(tfcompile model tag_set signature_def_key fname cpp_class)
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set(prefix ${CMAKE_CURRENT_BINARY_DIR}/${fname})
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set(obj_file ${prefix}.o)
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set(hdr_file ${prefix}.h)
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string(TOUPPER ${fname} fname_allcaps)
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set(override_header ${LLVM_OVERRIDE_MODEL_HEADER_${fname_allcaps}})
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set(override_object ${LLVM_OVERRIDE_MODEL_OBJECT_${fname_allcaps}})
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if (EXISTS "${override_header}" AND EXISTS "${override_object}")
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configure_file(${override_header} ${hdr_file} COPYONLY)
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configure_file(${override_object} ${obj_file} COPYONLY)
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message("Using provided header "
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${hdr_file} " and object " ${obj_file}
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" files for model " ${model})
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else()
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tfgetmodel(${model} LLVM_ML_MODELS_ABSOLUTE)
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message("Using model at " ${LLVM_ML_MODELS_ABSOLUTE})
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add_custom_command(OUTPUT ${obj_file} ${hdr_file}
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COMMAND "XLA_FLAGS=\"--xla_cpu_multi_thread_eigen=false\"" ${TENSORFLOW_AOT_COMPILER} aot_compile_cpu
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--dir ${LLVM_ML_MODELS_ABSOLUTE}
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--tag_set ${tag_set}
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--signature_def_key ${signature_def_key}
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--output_prefix ${prefix}
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--cpp_class ${cpp_class}
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--target_triple ${LLVM_HOST_TRIPLE}
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)
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endif()
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# Aggregate the objects so that results of different tfcompile calls may be
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# grouped into one target.
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set(GENERATED_OBJS ${GENERATED_OBJS} ${obj_file} PARENT_SCOPE)
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set_source_files_properties(${obj_file} PROPERTIES
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GENERATED 1 EXTERNAL_OBJECT 1)
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set(GENERATED_HEADERS ${GENERATED_HEADERS} ${hdr_file} PARENT_SCOPE)
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set_source_files_properties(${hdr_file} PROPERTIES
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GENERATED 1)
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endfunction()
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