cgraph.c (cgraph_node_can_be_local_p): New function.

2009-06-10  Martin Jambor  <mjambor@suse.cz>

	* cgraph.c (cgraph_node_can_be_local_p): New function.
	(cgraph_make_node_local): New function.
	* cgraph.h (cgraph_node_can_be_local_p): Declare.
	(cgraph_make_node_local): Declare.

From-SVN: r148349

gcc/ChangeLog

+2009-06-10  Martin Jambor  <mjambor@suse.cz>
+
+	* cgraph.c (cgraph_node_can_be_local_p): New function.
+	(cgraph_make_node_local): New function.
+	* cgraph.h (cgraph_node_can_be_local_p): Declare.
+	(cgraph_make_node_local): Declare.
+
 2009-06-10  Nathan Froyd  <froydnj@codesourcery.com>
 
 	* tree.h (tree_base): Add packed_flag and user_align fields.

gcc/cgraph.c

@@ -1871,4 +1871,32 @@ cgraph_add_new_function (tree fndecl, bool lowered)
     }
 }
 
+/* Return true if NODE can be made local for API change.
+   Extern inline functions and C++ COMDAT functions can be made local
+   at the expense of possible code size growth if function is used in multiple
+   compilation units.  */
+bool
+cgraph_node_can_be_local_p (struct cgraph_node *node)
+{
+  return !node->needed;
+}
+
+/* Bring NODE local.  */
+void
+cgraph_make_node_local (struct cgraph_node *node)
+{
+  gcc_assert (cgraph_node_can_be_local_p (node));
+  if (DECL_COMDAT (node->decl) || DECL_EXTERNAL (node->decl))
+    {
+      DECL_COMDAT (node->decl) = 0;
+      DECL_ONE_ONLY (node->decl) = 0;
+      TREE_PUBLIC (node->decl) = 0;
+      DECL_WEAK (node->decl) = 0;
+      DECL_EXTERNAL (node->decl) = 0;
+      node->local.externally_visible = false;
+      node->local.local = true;
+      gcc_assert (cgraph_function_body_availability (node) == AVAIL_LOCAL);
+    }
+}
+
 #include "gt-cgraph.h"

gcc/cgraph.h

@@ -505,6 +505,8 @@ void dump_varpool_node (FILE *, struct varpool_node *);
 void varpool_finalize_decl (tree);
 bool decide_is_variable_needed (struct varpool_node *, tree);
 enum availability cgraph_variable_initializer_availability (struct varpool_node *);
+void cgraph_make_node_local (struct cgraph_node *);
+bool cgraph_node_can_be_local_p (struct cgraph_node *);
 
 bool varpool_assemble_pending_decls (void);
 bool varpool_assemble_decl (struct varpool_node *node);