CMake: Adds header and TableGen files to Visual Studio solution. A new
dummy library, `llvm_headers_do_not_build', is created for containing
all header and TableGen files under include/llvm.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59346 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/cmake/modules/LLVMProcessSources.cmake b/cmake/modules/LLVMProcessSources.cmake
index 0dad3fb..12a8968 100644
--- a/cmake/modules/LLVMProcessSources.cmake
+++ b/cmake/modules/LLVMProcessSources.cmake
@@ -1,6 +1,26 @@
 include(AddFileDependencies)
 
-function(llvm_process_sources)
+
+macro(add_td_sources srcs)
+  file(GLOB tds *.td)
+  if( tds )
+    source_group("TableGen descriptions" FILES ${tds})
+    set_source_files_properties(${tds} PROPERTIES HEADER_FILE_ONLY ON)
+    list(APPEND ${srcs} ${tds})
+  endif()
+endmacro(add_td_sources)
+
+
+macro(add_header_files srcs)
+  file(GLOB hds *.h)
+  if( hds )
+    set_source_files_properties(${hds} PROPERTIES HEADER_FILE_ONLY ON)
+    list(APPEND ${srcs} ${hds})
+  endif()
+endmacro(add_header_files)
+
+
+function(llvm_process_sources OUT_VAR)
   set( sources ${ARGN} )
   # Create file dependencies on the tablegenned files, if any.  Seems
   # that this is not strictly needed, as dependencies of the .cpp
@@ -10,4 +30,10 @@
     set( f ${CMAKE_CURRENT_SOURCE_DIR}/${s} )
     add_file_dependencies( ${f} ${TABLEGEN_OUTPUT} )
   endforeach(s)
+  if( MSVC_IDE )
+    # This adds .td and .h files to the Visual Studio solution:
+    add_td_sources(sources)
+    add_header_files(sources)
+  endif()
+  set( ${OUT_VAR} ${sources} PARENT_SCOPE )
 endfunction(llvm_process_sources)