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Re: [PATCH] Fix optimization regression in constant folder

> The only reason to have sizetype is that there may be no language defined
> integral type of the required precision (which is the precision of
> pointers AFAIK).

No, it's needed to be sure that there's a consistent type used for all
sizing calculations in the middle-end.  In fact, it is normally REQUIRED
that there be a user-visible type with the same precision and signedness.
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