When compiling some files, the -da option or - AFAICT - any of its constituent options changes the generated code. When using -da, the -quiet option can also have an effect on the generated code, although this is harder to demonstrate.
-- Summary: -d option changes generated code Product: gcc Version: 4.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: rtl-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: amylaar at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24760