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cfaadc9af4
Omitting comments can make the output much smaller. Size/time impact on my machine: * lib/Target/AArch64/AArch64GenDAGISel.inc, 10MiB (8.89s) -> 5MiB (3.20s) * lib/Target/X86/X86GenDAGISel.inc, 20MiB (6.48s) -> 8.5MiB (4.18s) In total, this change decreases lib/Target/*/*GenDAGISel.inc from 71.4MiB to 30.1MiB. As rnk suggested, we can consider an option next to LLVM_OPTIMIZED_TABLEGEN once we have more needs like this. Reviewed By: thakis Differential Revision: https://reviews.llvm.org/D78884
204 lines
8.4 KiB
CMake
204 lines
8.4 KiB
CMake
# LLVM_TARGET_DEFINITIONS must contain the name of the .td file to process.
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# Extra parameters for `tblgen' may come after `ofn' parameter.
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# Adds the name of the generated file to TABLEGEN_OUTPUT.
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function(tablegen project ofn)
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# Validate calling context.
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if(NOT ${project}_TABLEGEN_EXE)
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message(FATAL_ERROR "${project}_TABLEGEN_EXE not set")
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endif()
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# Use depfile instead of globbing arbitrary *.td(s)
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# DEPFILE is available for Ninja Generator with CMake>=3.7.
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if(CMAKE_GENERATOR STREQUAL "Ninja" AND NOT CMAKE_VERSION VERSION_LESS 3.7)
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# Make output path relative to build.ninja, assuming located on
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# ${CMAKE_BINARY_DIR}.
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# CMake emits build targets as relative paths but Ninja doesn't identify
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# absolute path (in *.d) as relative path (in build.ninja)
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# Note that tblgen is executed on ${CMAKE_BINARY_DIR} as working directory.
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file(RELATIVE_PATH ofn_rel
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${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_BINARY_DIR}/${ofn})
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set(additional_cmdline
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-o ${ofn_rel}
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-d ${ofn_rel}.d
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WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
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DEPFILE ${CMAKE_CURRENT_BINARY_DIR}/${ofn}.d
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)
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set(local_tds)
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set(global_tds)
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else()
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file(GLOB local_tds "*.td")
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file(GLOB_RECURSE global_tds "${LLVM_MAIN_INCLUDE_DIR}/llvm/*.td")
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set(additional_cmdline
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-o ${CMAKE_CURRENT_BINARY_DIR}/${ofn}
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)
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endif()
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if (IS_ABSOLUTE ${LLVM_TARGET_DEFINITIONS})
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set(LLVM_TARGET_DEFINITIONS_ABSOLUTE ${LLVM_TARGET_DEFINITIONS})
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else()
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set(LLVM_TARGET_DEFINITIONS_ABSOLUTE
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${CMAKE_CURRENT_SOURCE_DIR}/${LLVM_TARGET_DEFINITIONS})
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endif()
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if (LLVM_ENABLE_DAGISEL_COV)
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list(FIND ARGN "-gen-dag-isel" idx)
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if( NOT idx EQUAL -1 )
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list(APPEND LLVM_TABLEGEN_FLAGS "-instrument-coverage")
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endif()
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endif()
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if (LLVM_ENABLE_GISEL_COV)
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list(FIND ARGN "-gen-global-isel" idx)
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if( NOT idx EQUAL -1 )
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list(APPEND LLVM_TABLEGEN_FLAGS "-instrument-gisel-coverage")
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list(APPEND LLVM_TABLEGEN_FLAGS "-gisel-coverage-file=${LLVM_GISEL_COV_PREFIX}all")
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endif()
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endif()
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# Comments are only useful for Debug builds. Omit them if the backend
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# supports it.
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if (NOT (uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" OR
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uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO"))
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list(FIND ARGN "-gen-dag-isel" idx)
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if (NOT idx EQUAL -1)
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list(APPEND LLVM_TABLEGEN_FLAGS "-omit-comments")
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endif()
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endif()
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# MSVC can't support long string literals ("long" > 65534 bytes)[1], so if there's
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# a possibility of generated tables being consumed by MSVC, generate arrays of
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# char literals, instead. If we're cross-compiling, then conservatively assume
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# that the source might be consumed by MSVC.
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# [1] https://docs.microsoft.com/en-us/cpp/cpp/compiler-limits?view=vs-2017
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if (MSVC AND project STREQUAL LLVM)
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list(APPEND LLVM_TABLEGEN_FLAGS "--long-string-literals=0")
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endif()
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if (CMAKE_GENERATOR MATCHES "Visual Studio")
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# Visual Studio has problems with llvm-tblgen's native --write-if-changed
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# behavior. Since it doesn't do restat optimizations anyway, just don't
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# pass --write-if-changed there.
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set(tblgen_change_flag)
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else()
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set(tblgen_change_flag "--write-if-changed")
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endif()
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# With CMake 3.12 this can be reduced to:
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# get_directory_property(tblgen_includes "INCLUDE_DIRECTORIES")
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# list(TRANSFORM tblgen_includes PREPEND -I)
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set(tblgen_includes)
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get_directory_property(includes "INCLUDE_DIRECTORIES")
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foreach(include ${includes})
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list(APPEND tblgen_includes -I ${include})
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endforeach()
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# We need both _TABLEGEN_TARGET and _TABLEGEN_EXE in the DEPENDS list
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# (both the target and the file) to have .inc files rebuilt on
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# a tablegen change, as cmake does not propagate file-level dependencies
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# of custom targets. See the following ticket for more information:
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# https://cmake.org/Bug/view.php?id=15858
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# The dependency on both, the target and the file, produces the same
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# dependency twice in the result file when
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# ("${${project}_TABLEGEN_TARGET}" STREQUAL "${${project}_TABLEGEN_EXE}")
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# but lets us having smaller and cleaner code here.
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add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${ofn}
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COMMAND ${${project}_TABLEGEN_EXE} ${ARGN} -I ${CMAKE_CURRENT_SOURCE_DIR}
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${tblgen_includes}
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${LLVM_TABLEGEN_FLAGS}
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${LLVM_TARGET_DEFINITIONS_ABSOLUTE}
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${tblgen_change_flag}
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${additional_cmdline}
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# The file in LLVM_TARGET_DEFINITIONS may be not in the current
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# directory and local_tds may not contain it, so we must
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# explicitly list it here:
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DEPENDS ${${project}_TABLEGEN_TARGET} ${${project}_TABLEGEN_EXE}
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${local_tds} ${global_tds}
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${LLVM_TARGET_DEFINITIONS_ABSOLUTE}
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COMMENT "Building ${ofn}..."
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)
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# `make clean' must remove all those generated files:
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set_property(DIRECTORY APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES ${ofn})
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set(TABLEGEN_OUTPUT ${TABLEGEN_OUTPUT} ${CMAKE_CURRENT_BINARY_DIR}/${ofn} PARENT_SCOPE)
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set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/${ofn} PROPERTIES
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GENERATED 1)
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endfunction()
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# Creates a target for publicly exporting tablegen dependencies.
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function(add_public_tablegen_target target)
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if(NOT TABLEGEN_OUTPUT)
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message(FATAL_ERROR "Requires tablegen() definitions as TABLEGEN_OUTPUT.")
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endif()
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add_custom_target(${target}
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DEPENDS ${TABLEGEN_OUTPUT})
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if(LLVM_COMMON_DEPENDS)
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add_dependencies(${target} ${LLVM_COMMON_DEPENDS})
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endif()
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set_target_properties(${target} PROPERTIES FOLDER "Tablegenning")
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set(LLVM_COMMON_DEPENDS ${LLVM_COMMON_DEPENDS} ${target} PARENT_SCOPE)
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endfunction()
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macro(add_tablegen target project)
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set(${target}_OLD_LLVM_LINK_COMPONENTS ${LLVM_LINK_COMPONENTS})
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set(LLVM_LINK_COMPONENTS ${LLVM_LINK_COMPONENTS} TableGen)
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# CMake-3.9 doesn't let compilation units depend on their dependent libraries.
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if(NOT (CMAKE_GENERATOR STREQUAL "Ninja" AND NOT CMAKE_VERSION VERSION_LESS 3.9) AND NOT XCODE)
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# FIXME: It leaks to user, callee of add_tablegen.
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set(LLVM_ENABLE_OBJLIB ON)
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endif()
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add_llvm_executable(${target} DISABLE_LLVM_LINK_LLVM_DYLIB ${ARGN})
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set(LLVM_LINK_COMPONENTS ${${target}_OLD_LLVM_LINK_COMPONENTS})
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set(${project}_TABLEGEN "${target}" CACHE
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STRING "Native TableGen executable. Saves building one when cross-compiling.")
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# Effective tblgen executable to be used:
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set(${project}_TABLEGEN_EXE ${${project}_TABLEGEN} PARENT_SCOPE)
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set(${project}_TABLEGEN_TARGET ${${project}_TABLEGEN} PARENT_SCOPE)
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if(LLVM_USE_HOST_TOOLS)
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if( ${${project}_TABLEGEN} STREQUAL "${target}" )
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# The NATIVE tablegen executable *must* depend on the current target one
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# otherwise the native one won't get rebuilt when the tablgen sources
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# change, and we end up with incorrect builds.
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build_native_tool(${target} ${project}_TABLEGEN_EXE DEPENDS ${target})
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set(${project}_TABLEGEN_EXE ${${project}_TABLEGEN_EXE} PARENT_SCOPE)
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add_custom_target(${project}-tablegen-host DEPENDS ${${project}_TABLEGEN_EXE})
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set(${project}_TABLEGEN_TARGET ${project}-tablegen-host PARENT_SCOPE)
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# Create an artificial dependency between tablegen projects, because they
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# compile the same dependencies, thus using the same build folders.
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# FIXME: A proper fix requires sequentially chaining tablegens.
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if (NOT ${project} STREQUAL LLVM AND TARGET ${project}-tablegen-host AND
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TARGET LLVM-tablegen-host)
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add_dependencies(${project}-tablegen-host LLVM-tablegen-host)
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endif()
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# If we're using the host tablegen, and utils were not requested, we have no
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# need to build this tablegen.
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if ( NOT LLVM_BUILD_UTILS )
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set_target_properties(${target} PROPERTIES EXCLUDE_FROM_ALL ON)
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endif()
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endif()
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endif()
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if ((${project} STREQUAL LLVM OR ${project} STREQUAL MLIR) AND NOT LLVM_INSTALL_TOOLCHAIN_ONLY AND LLVM_BUILD_UTILS)
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set(export_to_llvmexports)
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if(${target} IN_LIST LLVM_DISTRIBUTION_COMPONENTS OR
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NOT LLVM_DISTRIBUTION_COMPONENTS)
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set(export_to_llvmexports EXPORT LLVMExports)
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endif()
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install(TARGETS ${target}
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${export_to_llvmexports}
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COMPONENT ${target}
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RUNTIME DESTINATION ${LLVM_TOOLS_INSTALL_DIR})
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if(NOT LLVM_ENABLE_IDE)
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add_llvm_install_targets("install-${target}"
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DEPENDS ${target}
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COMPONENT ${target})
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endif()
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endif()
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set_property(GLOBAL APPEND PROPERTY LLVM_EXPORTS ${target})
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endmacro()
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