Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

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  1. # LLVM_TARGET_DEFINITIONS must contain the name of the .td file to process,
  2. # while LLVM_TARGET_DEPENDS may contain additional file dependencies.
  3. # Extra parameters for `tblgen' may come after `ofn' parameter.
  4. # Adds the name of the generated file to TABLEGEN_OUTPUT.
  5. include(LLVMDistributionSupport)
  6.  
  7. function(tablegen project ofn)
  8.   cmake_parse_arguments(ARG "" "" "DEPENDS;EXTRA_INCLUDES" ${ARGN})
  9.   # Validate calling context.
  10.   if(NOT ${project}_TABLEGEN_EXE)
  11.     message(FATAL_ERROR "${project}_TABLEGEN_EXE not set")
  12.   endif()
  13.  
  14.   # Use depfile instead of globbing arbitrary *.td(s) for Ninja.
  15.   if(CMAKE_GENERATOR MATCHES "Ninja")
  16.     # Make output path relative to build.ninja, assuming located on
  17.     # ${CMAKE_BINARY_DIR}.
  18.     # CMake emits build targets as relative paths but Ninja doesn't identify
  19.     # absolute path (in *.d) as relative path (in build.ninja)
  20.     # Note that tblgen is executed on ${CMAKE_BINARY_DIR} as working directory.
  21.     file(RELATIVE_PATH ofn_rel
  22.       ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_BINARY_DIR}/${ofn})
  23.     set(additional_cmdline
  24.       -o ${ofn_rel}
  25.       -d ${ofn_rel}.d
  26.       WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
  27.       DEPFILE ${CMAKE_CURRENT_BINARY_DIR}/${ofn}.d
  28.       )
  29.     set(local_tds)
  30.     set(global_tds)
  31.   else()
  32.     file(GLOB local_tds "*.td")
  33.     file(GLOB_RECURSE global_tds "${LLVM_MAIN_INCLUDE_DIR}/llvm/*.td")
  34.     set(additional_cmdline
  35.       -o ${CMAKE_CURRENT_BINARY_DIR}/${ofn}
  36.       )
  37.   endif()
  38.  
  39.   if (IS_ABSOLUTE ${LLVM_TARGET_DEFINITIONS})
  40.     set(LLVM_TARGET_DEFINITIONS_ABSOLUTE ${LLVM_TARGET_DEFINITIONS})
  41.   else()
  42.     set(LLVM_TARGET_DEFINITIONS_ABSOLUTE
  43.       ${CMAKE_CURRENT_SOURCE_DIR}/${LLVM_TARGET_DEFINITIONS})
  44.   endif()
  45.   if (LLVM_ENABLE_DAGISEL_COV AND "-gen-dag-isel" IN_LIST ARGN)
  46.     list(APPEND LLVM_TABLEGEN_FLAGS "-instrument-coverage")
  47.   endif()
  48.   if (LLVM_ENABLE_GISEL_COV AND "-gen-global-isel" IN_LIST ARGN)
  49.     list(APPEND LLVM_TABLEGEN_FLAGS "-instrument-gisel-coverage")
  50.     list(APPEND LLVM_TABLEGEN_FLAGS "-gisel-coverage-file=${LLVM_GISEL_COV_PREFIX}all")
  51.   endif()
  52.   if (LLVM_OMIT_DAGISEL_COMMENTS AND "-gen-dag-isel" IN_LIST ARGN)
  53.     list(APPEND LLVM_TABLEGEN_FLAGS "-omit-comments")
  54.   endif()
  55.  
  56.   # MSVC can't support long string literals ("long" > 65534 bytes)[1], so if there's
  57.   # a possibility of generated tables being consumed by MSVC, generate arrays of
  58.   # char literals, instead. If we're cross-compiling, then conservatively assume
  59.   # that the source might be consumed by MSVC.
  60.   # [1] https://docs.microsoft.com/en-us/cpp/cpp/compiler-limits?view=vs-2017
  61.   if (MSVC AND project STREQUAL LLVM)
  62.     list(APPEND LLVM_TABLEGEN_FLAGS "--long-string-literals=0")
  63.   endif()
  64.   if (CMAKE_GENERATOR MATCHES "Visual Studio")
  65.     # Visual Studio has problems with llvm-tblgen's native --write-if-changed
  66.     # behavior. Since it doesn't do restat optimizations anyway, just don't
  67.     # pass --write-if-changed there.
  68.     set(tblgen_change_flag)
  69.   else()
  70.     set(tblgen_change_flag "--write-if-changed")
  71.   endif()
  72.  
  73.   if (NOT LLVM_ENABLE_WARNINGS)
  74.     list(APPEND LLVM_TABLEGEN_FLAGS "-no-warn-on-unused-template-args")
  75.   endif()
  76.  
  77.   # We need both _TABLEGEN_TARGET and _TABLEGEN_EXE in the  DEPENDS list
  78.   # (both the target and the file) to have .inc files rebuilt on
  79.   # a tablegen change, as cmake does not propagate file-level dependencies
  80.   # of custom targets. See the following ticket for more information:
  81.   # https://cmake.org/Bug/view.php?id=15858
  82.   # The dependency on both, the target and the file, produces the same
  83.   # dependency twice in the result file when
  84.   # ("${${project}_TABLEGEN_TARGET}" STREQUAL "${${project}_TABLEGEN_EXE}")
  85.   # but lets us having smaller and cleaner code here.
  86.   get_directory_property(tblgen_includes INCLUDE_DIRECTORIES)
  87.   list(APPEND tblgen_includes ${ARG_EXTRA_INCLUDES})
  88.   # Filter out empty items before prepending each entry with -I
  89.   list(REMOVE_ITEM tblgen_includes "")
  90.   list(TRANSFORM tblgen_includes PREPEND -I)
  91.  
  92.   set(tablegen_exe ${${project}_TABLEGEN_EXE})
  93.   set(tablegen_depends ${${project}_TABLEGEN_TARGET} ${tablegen_exe})
  94.  
  95.   add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${ofn}
  96.     COMMAND ${tablegen_exe} ${ARG_UNPARSED_ARGUMENTS} -I ${CMAKE_CURRENT_SOURCE_DIR}
  97.     ${tblgen_includes}
  98.     ${LLVM_TABLEGEN_FLAGS}
  99.     ${LLVM_TARGET_DEFINITIONS_ABSOLUTE}
  100.     ${tblgen_change_flag}
  101.     ${additional_cmdline}
  102.     # The file in LLVM_TARGET_DEFINITIONS may be not in the current
  103.     # directory and local_tds may not contain it, so we must
  104.     # explicitly list it here:
  105.     DEPENDS ${ARG_DEPENDS} ${tablegen_depends}
  106.       ${local_tds} ${global_tds}
  107.     ${LLVM_TARGET_DEFINITIONS_ABSOLUTE}
  108.     ${LLVM_TARGET_DEPENDS}
  109.     COMMENT "Building ${ofn}..."
  110.     )
  111.  
  112.   # `make clean' must remove all those generated files:
  113.   set_property(DIRECTORY APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES ${ofn})
  114.  
  115.   set(TABLEGEN_OUTPUT ${TABLEGEN_OUTPUT} ${CMAKE_CURRENT_BINARY_DIR}/${ofn} PARENT_SCOPE)
  116.   set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/${ofn} PROPERTIES
  117.     GENERATED 1)
  118. endfunction()
  119.  
  120. # Creates a target for publicly exporting tablegen dependencies.
  121. function(add_public_tablegen_target target)
  122.   if(NOT TABLEGEN_OUTPUT)
  123.     message(FATAL_ERROR "Requires tablegen() definitions as TABLEGEN_OUTPUT.")
  124.   endif()
  125.   add_custom_target(${target}
  126.     DEPENDS ${TABLEGEN_OUTPUT})
  127.   if(LLVM_COMMON_DEPENDS)
  128.     add_dependencies(${target} ${LLVM_COMMON_DEPENDS})
  129.   endif()
  130.   set_target_properties(${target} PROPERTIES FOLDER "Tablegenning")
  131.   set(LLVM_COMMON_DEPENDS ${LLVM_COMMON_DEPENDS} ${target} PARENT_SCOPE)
  132. endfunction()
  133.  
  134. macro(add_tablegen target project)
  135.   cmake_parse_arguments(ADD_TABLEGEN "" "DESTINATION;EXPORT" "" ${ARGN})
  136.  
  137.   set(${target}_OLD_LLVM_LINK_COMPONENTS ${LLVM_LINK_COMPONENTS})
  138.   set(LLVM_LINK_COMPONENTS ${LLVM_LINK_COMPONENTS} TableGen)
  139.  
  140.   # CMake doesn't let compilation units depend on their dependent libraries on some generators.
  141.   if(NOT CMAKE_GENERATOR MATCHES "Ninja" AND NOT XCODE)
  142.     # FIXME: It leaks to user, callee of add_tablegen.
  143.     set(LLVM_ENABLE_OBJLIB ON)
  144.   endif()
  145.  
  146.   add_llvm_executable(${target} DISABLE_LLVM_LINK_LLVM_DYLIB
  147.     ${ADD_TABLEGEN_UNPARSED_ARGUMENTS})
  148.   set(LLVM_LINK_COMPONENTS ${${target}_OLD_LLVM_LINK_COMPONENTS})
  149.  
  150.   set(${project}_TABLEGEN_DEFAULT "${target}")
  151.   if (LLVM_NATIVE_TOOL_DIR)
  152.     if (EXISTS "${LLVM_NATIVE_TOOL_DIR}/${target}${LLVM_HOST_EXECUTABLE_SUFFIX}")
  153.       set(${project}_TABLEGEN_DEFAULT "${LLVM_NATIVE_TOOL_DIR}/${target}${LLVM_HOST_EXECUTABLE_SUFFIX}")
  154.     endif()
  155.   endif()
  156.   set(${project}_TABLEGEN "${${project}_TABLEGEN_DEFAULT}" CACHE
  157.       STRING "Native TableGen executable. Saves building one when cross-compiling.")
  158.  
  159.   # Effective tblgen executable to be used:
  160.   set(${project}_TABLEGEN_EXE ${${project}_TABLEGEN} PARENT_SCOPE)
  161.   set(${project}_TABLEGEN_TARGET ${${project}_TABLEGEN} PARENT_SCOPE)
  162.  
  163.   if(LLVM_USE_HOST_TOOLS)
  164.     if( ${${project}_TABLEGEN} STREQUAL "${target}" )
  165.       # The NATIVE tablegen executable *must* depend on the current target one
  166.       # otherwise the native one won't get rebuilt when the tablgen sources
  167.       # change, and we end up with incorrect builds.
  168.       build_native_tool(${target} ${project}_TABLEGEN_EXE DEPENDS ${target})
  169.       set(${project}_TABLEGEN_EXE ${${project}_TABLEGEN_EXE} PARENT_SCOPE)
  170.  
  171.       add_custom_target(${project}-tablegen-host DEPENDS ${${project}_TABLEGEN_EXE})
  172.       set(${project}_TABLEGEN_TARGET ${project}-tablegen-host PARENT_SCOPE)
  173.  
  174.       # Create an artificial dependency between tablegen projects, because they
  175.       # compile the same dependencies, thus using the same build folders.
  176.       # FIXME: A proper fix requires sequentially chaining tablegens.
  177.       if (NOT ${project} STREQUAL LLVM AND TARGET ${project}-tablegen-host AND
  178.           TARGET LLVM-tablegen-host)
  179.         add_dependencies(${project}-tablegen-host LLVM-tablegen-host)
  180.       endif()
  181.  
  182.       # If we're using the host tablegen, and utils were not requested, we have no
  183.       # need to build this tablegen.
  184.       if ( NOT LLVM_BUILD_UTILS )
  185.         set_target_properties(${target} PROPERTIES EXCLUDE_FROM_ALL ON)
  186.       endif()
  187.     endif()
  188.   endif()
  189.  
  190.   if (ADD_TABLEGEN_DESTINATION AND NOT LLVM_INSTALL_TOOLCHAIN_ONLY AND
  191.       (LLVM_BUILD_UTILS OR ${target} IN_LIST LLVM_DISTRIBUTION_COMPONENTS))
  192.     set(export_arg)
  193.     if(ADD_TABLEGEN_EXPORT)
  194.       get_target_export_arg(${target} ${ADD_TABLEGEN_EXPORT} export_arg)
  195.     endif()
  196.     install(TARGETS ${target}
  197.             ${export_arg}
  198.             COMPONENT ${target}
  199.             RUNTIME DESTINATION "${ADD_TABLEGEN_DESTINATION}")
  200.     if(NOT LLVM_ENABLE_IDE)
  201.       add_llvm_install_targets("install-${target}"
  202.                                DEPENDS ${target}
  203.                                COMPONENT ${target})
  204.     endif()
  205.   endif()
  206.   if(ADD_TABLEGEN_EXPORT)
  207.     string(TOUPPER ${ADD_TABLEGEN_EXPORT} export_upper)
  208.     set_property(GLOBAL APPEND PROPERTY ${export_upper}_EXPORTS ${target})
  209.   endif()
  210. endmacro()
  211.