https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99212
--- Comment #11 from David Malcolm <dmalcolm at gcc dot gnu.org> --- I experimented with fixing this properly so that it works for all targets, but the fix involves adding a new region subclass to handle bitfields, and so feels far too risky for GCC 11. Hence this should be XFAILed for GCC 11; I'm not yet sure exactly what the target selector should be.
