Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

# 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.

include(LLVMDistributionSupport)

function(tablegen project ofn)

  cmake_parse_arguments(ARG "" "" "DEPENDS;EXTRA_INCLUDES" ${ARGN})

  # 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 MATCHES "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 AND "-gen-dag-isel" IN_LIST ARGN)

    list(APPEND LLVM_TABLEGEN_FLAGS "-instrument-coverage")

  endif()

  if (LLVM_ENABLE_GISEL_COV AND "-gen-global-isel" IN_LIST ARGN)

    list(APPEND LLVM_TABLEGEN_FLAGS "-instrument-gisel-coverage")

    list(APPEND LLVM_TABLEGEN_FLAGS "-gisel-coverage-file=${LLVM_GISEL_COV_PREFIX}all")

  endif()

  if (LLVM_OMIT_DAGISEL_COMMENTS AND "-gen-dag-isel" IN_LIST ARGN)

    list(APPEND LLVM_TABLEGEN_FLAGS "-omit-comments")

  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()

  if (NOT LLVM_ENABLE_WARNINGS)

    list(APPEND LLVM_TABLEGEN_FLAGS "-no-warn-on-unused-template-args")

  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(APPEND tblgen_includes ${ARG_EXTRA_INCLUDES})

  # Filter out empty items before prepending each entry with -I

  list(REMOVE_ITEM tblgen_includes "")

  list(TRANSFORM tblgen_includes PREPEND -I)

  set(tablegen_exe ${${project}_TABLEGEN_EXE})

  set(tablegen_depends ${${project}_TABLEGEN_TARGET} ${tablegen_exe})

  add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${ofn}

    COMMAND ${tablegen_exe} ${ARG_UNPARSED_ARGUMENTS} -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 ${ARG_DEPENDS} ${tablegen_depends}

      ${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)

  cmake_parse_arguments(ADD_TABLEGEN "" "DESTINATION;EXPORT" "" ${ARGN})

  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 MATCHES "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

    ${ADD_TABLEGEN_UNPARSED_ARGUMENTS})

  set(LLVM_LINK_COMPONENTS ${${target}_OLD_LLVM_LINK_COMPONENTS})

  set(${project}_TABLEGEN_DEFAULT "${target}")

  if (LLVM_NATIVE_TOOL_DIR)

    if (EXISTS "${LLVM_NATIVE_TOOL_DIR}/${target}${LLVM_HOST_EXECUTABLE_SUFFIX}")

      set(${project}_TABLEGEN_DEFAULT "${LLVM_NATIVE_TOOL_DIR}/${target}${LLVM_HOST_EXECUTABLE_SUFFIX}")

    endif()

  endif()

  set(${project}_TABLEGEN "${${project}_TABLEGEN_DEFAULT}" 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 (ADD_TABLEGEN_DESTINATION AND NOT LLVM_INSTALL_TOOLCHAIN_ONLY AND

      (LLVM_BUILD_UTILS OR ${target} IN_LIST LLVM_DISTRIBUTION_COMPONENTS))

    set(export_arg)

    if(ADD_TABLEGEN_EXPORT)

      get_target_export_arg(${target} ${ADD_TABLEGEN_EXPORT} export_arg)

    endif()

    install(TARGETS ${target}

            ${export_arg}

            COMPONENT ${target}

            RUNTIME DESTINATION "${ADD_TABLEGEN_DESTINATION}")

    if(NOT LLVM_ENABLE_IDE)

      add_llvm_install_targets("install-${target}"

                               DEPENDS ${target}

                               COMPONENT ${target})

    endif()

  endif()

  if(ADD_TABLEGEN_EXPORT)

    string(TOUPPER ${ADD_TABLEGEN_EXPORT} export_upper)

    set_property(GLOBAL APPEND PROPERTY ${export_upper}_EXPORTS ${target})

  endif()

endmacro()