http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48492
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-04-16 07:59:24 UTC --- Reachability analysis should never take into account DEBUG stmts, the bug is IMNSHO in that we shouldn't ever stream DECL_IN_CONSTANT_POOL with error_mark_node as DECL_INITIAL. Even if we don't hit this problem, if DECL_IN_CONSTANT_POOL aren't actually handled specially by LTO streamer, the constants won't be merged across different CUs, whcih is undesirable.
