lto.c (partition_cgraph_node_p, [...]): Handle COMDATs required by the linker.

	* lto.c (partition_cgraph_node_p, partition_varpool_node_p): Handle
	COMDATs required by the linker.

From-SVN: r165058

gcc/lto/ChangeLog

+2010-10-06  Jan Hubicka  <jh@suse.cz>
+
+	* lto.c (partition_cgraph_node_p, partition_varpool_node_p): Handle
+	COMDATs required by the linker.
+
 2010-10-05  Ian Lance Taylor  <iant@google.com>
 
 	* lto.c (lto_section_with_id): Make s a const pointer.

gcc/lto/lto.c

@@ -839,7 +839,8 @@ partition_cgraph_node_p (struct cgraph_node *node)
     return false;
   /* Extern inlines and comdat are always only in partitions they are needed.  */
   if (DECL_EXTERNAL (node->decl)
-      || DECL_COMDAT (node->decl))
+      || (DECL_COMDAT (node->decl)
+	  && !cgraph_used_from_object_file_p (node)))
     return false;
   return true;
 }
@@ -854,7 +855,8 @@ partition_varpool_node_p (struct varpool_node *vnode)
     return false;
   /* Constant pool and comdat are always only in partitions they are needed.  */
   if (DECL_IN_CONSTANT_POOL (vnode->decl)
-      || DECL_COMDAT (vnode->decl))
+      || (DECL_COMDAT (vnode->decl)
+	  && !varpool_used_from_object_file_p (vnode)))
     return false;
   return true;
 }