lto/lto.c – used $ or . in generated linkptr name

	* lto.c (offload_handle_link_vars): Reduce chance of
	naming clashes of generated linkptr variable.

gcc/lto/ChangeLog

 2020-01-29  Tobias Burnus  <tobias@codesourcery.com>
 
+	* lto.c (offload_handle_link_vars): Reduce chance of
+	naming clashes of generated linkptr variable.
+
+2020-01-29  Tobias Burnus  <tobias@codesourcery.com>
+
 	PR middle-end/94233
 	* lto.c (offload_handle_link_vars): Cleanup; call
 	build_decl to ensure alignment is set.

gcc/lto/lto.c

@@ -561,11 +561,9 @@ offload_handle_link_vars (void)
 			  DECL_ATTRIBUTES (var->decl)))
       {
 	tree type = build_pointer_type (TREE_TYPE (var->decl));
-	tree var_name = DECL_ASSEMBLER_NAME (var->decl);
-	char *new_name
-	  = ACONCAT ((IDENTIFIER_POINTER (var_name), "_linkptr", NULL));
 	tree link_ptr_var = build_decl (UNKNOWN_LOCATION, VAR_DECL,
-					get_identifier (new_name), type);
+					clone_function_name (var->decl,
+							     "linkptr"), type);
 	TREE_USED (link_ptr_var) = 1;
 	TREE_STATIC (link_ptr_var) = 1;
 	DECL_ARTIFICIAL (link_ptr_var) = 1;