https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104120
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- I suspect it is this part which introduced more debug statements which made it slower: * c-typeck.c (c_finish_loop): Add COND_LOCUS and INCR_LOCUS arguments, emit DEBUG_BEGIN_STMTs if needed
