In invoke.texi, the description for -frtl-abstract-sequences is located between -frounding-math and -fsignaling-nans. It means that the description is located in a @table specially dedicated to GCC floating-point compliance, while the option is not related to floating-point arithmetic at all. It should be moved in another table, perhaps before --param.
-- Summary: Documentation for -frtl-abstract-sequences is in the wrong place Product: gcc Version: 4.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: rtl-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: guillaume dot melquiond at ens-lyon dot fr http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31549