http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50317
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-11-28 13:17:02 UTC --- Created attachment 25934 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25934 gcc47-pr50317-2.patch Patch to drop ={v} {CLOBBER} stmts when the lhs lost TREE_ADDRESSABLE bit during execute_update_addresses_taken. If I remember well, Micha said that CLOBBERs for SSA_NAMEs are undesirable and indeed for debug stmts they are just harmful - the end of the scope is better to be determined from where the scope in the debug info ends, when we add DEBUG var => {CLOBBER}, it might be still before a few stmts such as GIMPLE_RETURN in this testcase where it is still valid.
