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Re: c_common_type_for_mode: pass precision, not mode

> Well, what's there is clearly wrong - make_(un)signed_type do not
> take mode enumerators.  I assume this code is unreachable in ports
> with "normal" Pmode?

Right.  It's possible this code path has never been used.  Actually,
I'm finding a *lot* of places in gcc that assume "normal" CPUs.

> It's used - directly - to set TYPE_PRECISION, which makes me think
> that what you have here is correct, but I could be wrong.

Oh, yeah, that would be a defining factor, wouldn't it?
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