I decided to look at what passes are not documented recently and I noticed that openmp lowering pass is not documented at all.
-- Summary: [4.2 Regression] passes.texi does not document the openMP lowering pass Product: gcc Version: 4.2.0 Status: UNCONFIRMED Keywords: documentation Severity: normal Priority: P3 Component: middle-end AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: pinskia at gcc dot gnu dot org OtherBugsDependingO 951 nThis: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26238