cgraph.h (cgraph_mark_if_needed): New function.

	* cgraph.h (cgraph_mark_if_needed): New function.
	* cgraphunit.c (cgraph_mark_if_needed): New function.
	* c-decl.c (duplicate_decl): Use it.

From-SVN: r136893

gcc/ChangeLog

 2008-06-16  Jan Hubicka  <jh@suse.cz>
 
+	* cgraph.h (cgraph_mark_if_needed): New function.
+	* cgraphunit.c (cgraph_mark_if_needed): New function.
+	* c-decl.c (duplicate_decl): Use it.
+
+2008-06-16  Jan Hubicka  <jh@suse.cz>
+
 	* cgraph.c (cgraph_add_new_function): When in expansion state, do
 	lowering.
 

gcc/c-decl.c

@@ -1915,7 +1915,7 @@ merge_decls (tree newdecl, tree olddecl, tree newtype, tree oldtype)
      to be called again.  */
   if (extern_changed && !new_is_definition
       && TREE_CODE (olddecl) == FUNCTION_DECL && DECL_INITIAL (olddecl))
-    cgraph_finalize_function (olddecl, false);
+    cgraph_mark_if_needed (olddecl);
 }
 
 /* Handle when a new declaration NEWDECL has the same name as an old

gcc/cgraph.h

@@ -331,6 +331,7 @@ void cgraph_add_new_function (tree, bool);
 
 /* In cgraphunit.c  */
 void cgraph_finalize_function (tree, bool);
+void cgraph_mark_if_needed (tree);
 void cgraph_finalize_compilation_unit (void);
 void cgraph_optimize (void);
 void cgraph_mark_needed_node (struct cgraph_node *);

gcc/cgraphunit.c

@@ -642,6 +642,18 @@ cgraph_finalize_function (tree decl, bool nested)
     do_warn_unused_parameter (decl);
 }
 
+/* C99 extern inline keywords allow changing of declaration after function
+   has been finalized.  We need to re-decide if we want to mark the function as
+   needed then.   */
+
+void
+cgraph_mark_if_needed (tree decl)
+{
+  struct cgraph_node *node = cgraph_node (decl);
+  if (node->local.finalized && decide_is_function_needed (node, decl))
+    cgraph_mark_needed_node (node);
+}
+
 /* Verify cgraph nodes of given cgraph node.  */
 void
 verify_cgraph_node (struct cgraph_node *node)