https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89592
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org, | |msebor at gcc dot gnu.org --- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Started with r233126. Before that change, check2227 has not been NRV optimized, but now it is. That doesn't explain an ABI difference though.