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Re: stormy16: limit SI reload regs

> In that case, maybe it'd be a good idea to just fix register allocation?

I thought about that, but I'm not that familiar with that code.  I
suspect it would need to be something near one of the calls to
PREFERRED_RELOAD_CLASS(), needing to also call HARD_REGNO_NREGS.  I'm
willing to look at it if a reload expert could give me a clue or two ;-)

With my luck, that would break other targets though.

I wonder if HARD_REGNO_MODE_OK could be used for this?
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