https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106499
--- Comment #23 from Martin Liška <marxin at gcc dot gnu.org> --- > If may I ask yet another question 😋 Sure, don't hesitate ;) > Martin can you tell how did you manage to diagnose that it was exactly that > cause in this case? I noticed we spent time in inliner (perf top) and then I suspected a flatten attribute. So 'git grep flatten' proved that.