https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72827
--- Comment #22 from Michael Meissner <meissner at gcc dot gnu.org> --- Note, if the index register is R0 and the base register is SP, you might not be able to use the other register (well you can use it, but you likely will get a segmentation fault or just access the wrong memory). I would at least put in a gcc_assert to make sure it isn't R0.
