When compiling gcc.dg/parm-impl-decl-1.c with -g, there seems to be an infinite loop in gen_decl_die. This is present in 4.4.2 on my workstation, as well as on trunk.
-- Summary: infinite loop in gcc.dg/parm-impl-decl-1.c with -g Product: gcc Version: 4.5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: debug AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: aldyh at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43381