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