tree.h: Move documentation for tree_function_decl to tree-core.h with the declaration.

	* tree.h: Move documentation for tree_function_decl to tree-core.h
	with the declaration.

From-SVN: r202289

gcc/ChangeLog

+2013-09-05  Mike Stump  <mikestump@comcast.net>
+
+	* tree.h: Move documentation for tree_function_decl to tree-core.h
+	with the declaration.
+
 2013-09-05  Peter Bergner  <bergner@vnet.ibm.com>
 
 	PR target/58139

gcc/tree-core.h

@@ -1328,6 +1328,11 @@ struct GTY(()) tree_decl_non_common {
   tree vindex;
 };
 
+/* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
+   arguments/result/saved_tree fields by front ends.   It was either inherit
+   FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
+   which seemed a bit strange.  */
+
 struct GTY(()) tree_function_decl {
   struct tree_decl_non_common common;
 

gcc/tree.h

@@ -2543,11 +2543,6 @@ extern vec<tree, va_gc> **decl_debug_args_insert (tree);
 #define DECL_FINAL_P(NODE)\
    (FUNCTION_DECL_CHECK (NODE)->decl_with_vis.final)
 
-/* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
-   arguments/result/saved_tree fields by front ends.   It was either inherit
-   FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
-   which seemed a bit strange.  */
-
 /* The source language of the translation-unit.  */
 #define TRANSLATION_UNIT_LANGUAGE(NODE) \
   (TRANSLATION_UNIT_DECL_CHECK (NODE)->translation_unit_decl.language)