When I noticed PR 35843, I saw that some -dletter was still referenced in some cases: -dv For each of the other indicated dump files (either with -d or -fdump-rtl-pass), dump a representation of the control flow graph suitable for viewing with VCG to file.pass.vcg. -dx Just generate RTL for a function instead of compiling it. Usually used with `r' (-fdump-rtl-expand).
Also the sentence above this list is incorrect as the long options don't have a -d letter any more: Most debug dumps can be enabled either passing a letter to the -d option, or with a long -fdump-rtl switch; here are the possible letters for use in letters and pass, and their meanings: -- Summary: [4.4 Regression] -d is still referenced in some cases (documentation) Product: gcc Version: 4.4.0 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 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35853