> I believe we've generally assumed that all hard registers can be > subreg'd. That said, HARD_REGNO_MODE_OK should keep QImode values > out of those registers. And insn constraints should keep reload > from using those registers for QImode insns. So can you expand on > what is actually going wrong?
Ok, I tried letting it put QImode values in any register. Now it's trying to figure out how many 32 bit values it can stuff into a 24 bit register. Since the function returns an int, I'm not sure how to answer. Is HARD_REGNO_NREGS *required* to return a positive value, no matter what the chip actually supports?
