https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91406
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- -Q -v is only a wild guess given whether options are enabled or disabled may depend on the function context. There's really no way to implement it accurately (this -1 trick for "auto-detection" could eventually be handled in some generic way, saying not enabled/disabled but "<auto>" or "<unknown>")
