https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53949
--- Comment #14 from Oleg Endo <olegendo at gcc dot gnu.org> --- (In reply to Oleg Endo from comment #3) > > - When compiling for big endian the RA mistakes mach and macl when > storing mach:macl to a DImode reg:reg pair. > This could probably fixed by providing appropriate move insns patterns. I believe this is PR 29961.