1# LLVM_TARGET_DEFINITIONS must contain the name of the .td file to process.
2# Extra parameters for `tblgen' may come after `ofn' parameter.
3# Adds the name of the generated file to TABLEGEN_OUTPUT.
4
5function(tablegen project ofn)
6  # Validate calling context.
7  foreach(v
8      ${project}_TABLEGEN_EXE
9      LLVM_MAIN_SRC_DIR
10      LLVM_MAIN_INCLUDE_DIR
11      )
12    if(NOT ${v})
13      message(FATAL_ERROR "${v} not set")
14    endif()
15  endforeach()
16
17  file(GLOB local_tds "*.td")
18  file(GLOB_RECURSE global_tds "${LLVM_MAIN_INCLUDE_DIR}/llvm/*.td")
19
20  if (IS_ABSOLUTE ${LLVM_TARGET_DEFINITIONS})
21    set(LLVM_TARGET_DEFINITIONS_ABSOLUTE ${LLVM_TARGET_DEFINITIONS})
22  else()
23    set(LLVM_TARGET_DEFINITIONS_ABSOLUTE
24      ${CMAKE_CURRENT_SOURCE_DIR}/${LLVM_TARGET_DEFINITIONS})
25  endif()
26  add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${ofn}.tmp
27    # Generate tablegen output in a temporary file.
28    COMMAND ${${project}_TABLEGEN_EXE} ${ARGN} -I ${CMAKE_CURRENT_SOURCE_DIR}
29    -I ${LLVM_MAIN_SRC_DIR}/lib/Target -I ${LLVM_MAIN_INCLUDE_DIR}
30    ${LLVM_TARGET_DEFINITIONS_ABSOLUTE}
31    -o ${CMAKE_CURRENT_BINARY_DIR}/${ofn}.tmp
32    # The file in LLVM_TARGET_DEFINITIONS may be not in the current
33    # directory and local_tds may not contain it, so we must
34    # explicitly list it here:
35    DEPENDS ${${project}_TABLEGEN_EXE} ${local_tds} ${global_tds}
36    ${LLVM_TARGET_DEFINITIONS_ABSOLUTE}
37    COMMENT "Building ${ofn}..."
38    )
39  add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${ofn}
40    # Only update the real output file if there are any differences.
41    # This prevents recompilation of all the files depending on it if there
42    # aren't any.
43    COMMAND ${CMAKE_COMMAND} -E copy_if_different
44        ${CMAKE_CURRENT_BINARY_DIR}/${ofn}.tmp
45        ${CMAKE_CURRENT_BINARY_DIR}/${ofn}
46    DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${ofn}.tmp
47    COMMENT "Updating ${ofn}..."
48    )
49
50  # `make clean' must remove all those generated files:
51  set_property(DIRECTORY APPEND
52    PROPERTY ADDITIONAL_MAKE_CLEAN_FILES ${ofn}.tmp ${ofn})
53
54  set(TABLEGEN_OUTPUT ${TABLEGEN_OUTPUT} ${CMAKE_CURRENT_BINARY_DIR}/${ofn} PARENT_SCOPE)
55  set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/${ofn} PROPERTIES
56    GENERATED 1)
57endfunction()
58
59# Creates a target for publicly exporting tablegen dependencies.
60function(add_public_tablegen_target target)
61  if(NOT TABLEGEN_OUTPUT)
62    message(FATAL_ERROR "Requires tablegen() definitions as TABLEGEN_OUTPUT.")
63  endif()
64  add_custom_target(${target}
65    DEPENDS ${TABLEGEN_OUTPUT})
66  if(LLVM_COMMON_DEPENDS)
67    add_dependencies(${target} ${LLVM_COMMON_DEPENDS})
68  endif()
69  set_target_properties(${target} PROPERTIES FOLDER "Tablegenning")
70  set(LLVM_COMMON_DEPENDS ${LLVM_COMMON_DEPENDS} ${target} PARENT_SCOPE)
71endfunction()
72
73macro(add_tablegen target project)
74  set(${target}_OLD_LLVM_LINK_COMPONENTS ${LLVM_LINK_COMPONENTS})
75  set(LLVM_LINK_COMPONENTS ${LLVM_LINK_COMPONENTS} TableGen)
76  add_llvm_utility(${target} ${ARGN})
77  set(LLVM_LINK_COMPONENTS ${${target}_OLD_LLVM_LINK_COMPONENTS})
78
79  set(${project}_TABLEGEN "${target}" CACHE
80      STRING "Native TableGen executable. Saves building one when cross-compiling.")
81
82  # Upgrade existing LLVM_TABLEGEN setting.
83  if(${project} STREQUAL LLVM)
84    if(${LLVM_TABLEGEN} STREQUAL tblgen)
85      set(LLVM_TABLEGEN "${target}" CACHE
86          STRING "Native TableGen executable. Saves building one when cross-compiling."
87          FORCE)
88    endif()
89  endif()
90
91  # Effective tblgen executable to be used:
92  set(${project}_TABLEGEN_EXE ${${project}_TABLEGEN} PARENT_SCOPE)
93
94  if(CMAKE_CROSSCOMPILING)
95    if( ${${project}_TABLEGEN} STREQUAL "${target}" )
96      set(${project}_TABLEGEN_EXE "${LLVM_NATIVE_BUILD}/bin/${target}")
97      set(${project}_TABLEGEN_EXE ${${project}_TABLEGEN_EXE} PARENT_SCOPE)
98
99      add_custom_command(OUTPUT ${${project}_TABLEGEN_EXE}
100        COMMAND ${CMAKE_COMMAND} --build . --target ${target} --config $<CONFIGURATION>
101        DEPENDS ${LLVM_NATIVE_BUILD}/CMakeCache.txt
102        WORKING_DIRECTORY ${LLVM_NATIVE_BUILD}
103        COMMENT "Building native TableGen...")
104      add_custom_target(${project}NativeTableGen DEPENDS ${${project}_TABLEGEN_EXE})
105      add_dependencies(${project}NativeTableGen ConfigureNativeLLVM)
106
107      add_dependencies(${target} ${project}NativeTableGen)
108    endif()
109  endif()
110
111  if( MINGW )
112    if(CMAKE_SIZEOF_VOID_P MATCHES "8")
113      set_target_properties(${target} PROPERTIES LINK_FLAGS -Wl,--stack,16777216)
114    endif(CMAKE_SIZEOF_VOID_P MATCHES "8")
115  endif( MINGW )
116  if (${project} STREQUAL LLVM AND NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
117    install(TARGETS ${target}
118            EXPORT LLVMExports
119            RUNTIME DESTINATION bin)
120  endif()
121  set_property(GLOBAL APPEND PROPERTY LLVM_EXPORTS ${target})
122endmacro()
123