http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48506
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2011.04.08 08:44:22
Ever Confirmed|0 |1
--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-04-08
08:44:22 UTC ---
Hmm, it _should_ be able to fold g.i to 0. It doesn't because
targetm.binds_local_p () returns false on g because its DECL_COMMON.
Maybe not so on darwin?
6779 /* Uninitialized COMMON variable may be unified with symbols
6780 resolved from other modules. */
6781 else if (DECL_COMMON (exp)
6782 && !resolved_locally
6783 && (DECL_INITIAL (exp) == NULL
6784 || DECL_INITIAL (exp) == error_mark_node))
6785 local_p = false;
thus -fno-common makes the testcase fail for me.
I'd say change it to have an explicit initializer,
const struct Foo g = { 0 };
and scan for "return 0;" instead.
