When loading from a constant, fold inttoptr if the integer type and the resulting...

[oota-llvm.git] / cmake / modules / TableGen.cmake

diff --git a/cmake/modules/TableGen.cmake b/cmake/modules/TableGen.cmake
index aed65589c23021f14aadd6f604ceaa6e27d45d47..9d67137bb42a3b08b9f2a342cb644146aafe5bba 100644 (file)
--- a/cmake/modules/TableGen.cmake
+++ b/cmake/modules/TableGen.cmake
@@ -3,11 +3,44 @@
 # Adds the name of the generated file to TABLEGEN_OUTPUT.
 
 macro(tablegen ofn)
-  file(GLOB all_tds "*.td")
-  add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${ofn}
-    COMMAND ${LLVM_TABLEGEN} ${ARGN} -I ${CMAKE_CURRENT_SOURCE_DIR} -I ${CMAKE_SOURCE_DIR}/lib/Target -I ${LLVM_MAIN_INCLUDE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/${LLVM_TARGET_DEFINITIONS} -o ${ofn}
-    DEPENDS tblgen ${all_tds}
+  file(GLOB local_tds "*.td")
+  file(GLOB_RECURSE global_tds "${LLVM_MAIN_SRC_DIR}/include/llvm/*.td")
+
+  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()
+  add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${ofn}.tmp
+    # Generate tablegen output in a temporary file.
+    COMMAND ${LLVM_TABLEGEN_EXE} ${ARGN} -I ${CMAKE_CURRENT_SOURCE_DIR}
+    -I ${LLVM_MAIN_SRC_DIR}/lib/Target -I ${LLVM_MAIN_INCLUDE_DIR}
+    ${LLVM_TARGET_DEFINITIONS_ABSOLUTE} 
+    -o ${CMAKE_CURRENT_BINARY_DIR}/${ofn}.tmp
+    # 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 ${LLVM_TABLEGEN_EXE} ${local_tds} ${global_tds}
+    ${LLVM_TARGET_DEFINITIONS_ABSOLUTE}
     COMMENT "Building ${ofn}..."
     )
+  add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${ofn}
+    # Only update the real output file if there are any differences.
+    # This prevents recompilation of all the files depending on it if there
+    # aren't any.
+    COMMAND ${CMAKE_COMMAND} -E copy_if_different
+        ${CMAKE_CURRENT_BINARY_DIR}/${ofn}.tmp
+        ${CMAKE_CURRENT_BINARY_DIR}/${ofn}
+    DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${ofn}.tmp
+    COMMENT ""
+    )
+
+  # `make clean' must remove all those generated files:
+  set_property(DIRECTORY APPEND
+    PROPERTY ADDITIONAL_MAKE_CLEAN_FILES ${ofn}.tmp ${ofn})
+
   set(TABLEGEN_OUTPUT ${TABLEGEN_OUTPUT} ${CMAKE_CURRENT_BINARY_DIR}/${ofn})
+  set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/${ofn} 
+    PROPERTIES GENERATED 1)
 endmacro(tablegen)