https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65964 Bug 65964 depends on bug 41076, which changed state.
Bug 41076 Summary: [avr] pessimal code for logical OR of 8-bit fields https://gcc.gnu.org/bugzilla/show_bug.cgi?id=41076 What |Removed |Added ---------------------------------------------------------------------------- Status|REOPENED |RESOLVED Resolution|--- |FIXED