http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57649
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2013-06-19
CC| |ebotcazou at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
We have this patchlet in our 4.7 tree:
--- a/gcc/tree-dfa.c
+++ b/gcc/tree-dfa.c
@@ -590,10 +590,13 @@ add_referenced_var (tree var)
/* Scan DECL_INITIAL for pointer variables as they may contain
address arithmetic referencing the address of other
variables. As we are only interested in directly referenced
- globals or referenced locals restrict this to initializers
- than can refer to local variables. */
+ globals or referenced locals, restrict this to initializers
+ than can refer to local variables. But we need to do it for
+ initializers of global variables declared in parent functions
+ lest these variables aren't referenced anywhere else. */
if (DECL_INITIAL (var)
- && DECL_CONTEXT (var) == current_function_decl)
+ && (DECL_CONTEXT (var) == current_function_decl
+ || (!DECL_FILE_SCOPE_P (var) && is_global_var (var))))
walk_tree (&DECL_INITIAL (var), find_vars_r, NULL, 0);
return true;
* tree-dfa.c (add_referenced_var): Find variables referenced in the
initializers of global variables declared in parent functions.
