https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98945
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- Guess it's from unprototyped function times where float would be promoted to double.
rguenth at gcc dot gnu.org via Gcc-bugs Tue, 02 Feb 2021 23:39:32 -0800
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98945
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- Guess it's from unprototyped function times where float would be promoted to double.