http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55111
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> 2012-10-30 10:27:51 UTC --- We have an unfolded stmt: (gdb) call debug_gimple_stmt (def_stmt) pretmp_36 = (long int) 18446744073709551615; I have a patch.