https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116236
--- Comment #25 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Richard Sandiford from comment #24) > Hopefully fixed, but please let me know if this code causes similar problems > elsewhere. I think there was a corresponding bug on the AVR side, not sure if that's now also resolved.