Revert r114340 (improvements in Darwin function prologue/epilogue), as it broke
[oota-llvm.git] / cmake / modules / TableGen.cmake
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
5 macro(tablegen ofn)
6   file(GLOB local_tds "*.td")
7   file(GLOB_RECURSE global_tds "${LLVM_MAIN_SRC_DIR}/include/llvm/*.td")
8
9   if (IS_ABSOLUTE ${LLVM_TARGET_DEFINITIONS})
10     set(LLVM_TARGET_DEFINITIONS_ABSOLUTE ${LLVM_TARGET_DEFINITIONS})
11   else()
12     set(LLVM_TARGET_DEFINITIONS_ABSOLUTE 
13       ${CMAKE_CURRENT_SOURCE_DIR}/${LLVM_TARGET_DEFINITIONS})
14   endif()
15   add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${ofn}.tmp
16     # Generate tablegen output in a temporary file.
17     COMMAND ${LLVM_TABLEGEN_EXE} ${ARGN} -I ${CMAKE_CURRENT_SOURCE_DIR}
18     -I ${LLVM_MAIN_SRC_DIR}/lib/Target -I ${LLVM_MAIN_INCLUDE_DIR}
19     ${LLVM_TARGET_DEFINITIONS_ABSOLUTE} 
20     -o ${CMAKE_CURRENT_BINARY_DIR}/${ofn}.tmp
21     DEPENDS tblgen ${local_tds} ${global_tds}
22     COMMENT "Building ${ofn}..."
23     )
24   add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${ofn}
25     # Only update the real output file if there are any differences.
26     # This prevents recompilation of all the files depending on it if there
27     # aren't any.
28     COMMAND ${CMAKE_COMMAND} -E copy_if_different
29         ${CMAKE_CURRENT_BINARY_DIR}/${ofn}.tmp
30         ${CMAKE_CURRENT_BINARY_DIR}/${ofn}
31     DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${ofn}.tmp
32     COMMENT ""
33     )
34   set(TABLEGEN_OUTPUT ${TABLEGEN_OUTPUT} ${CMAKE_CURRENT_BINARY_DIR}/${ofn})
35   set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/${ofn} 
36     PROPERTIES GENERATED 1)
37 endmacro(tablegen)