[project @ 2001-10-16 10:01:13 by simonmar]
Explicitly sign- or zero-extend the result of a ccall up to the word
size if necessary. Recent discussion on
glasgow-haskell-users@haskell.org suggests that this is the
responsibility of the caller rather than the callee.
We do it by wrapping the result in narrow{8,16,32}{Int,Word}# as
appropriate, at desugaring time, because this way we only have to do
it once instead of once per backend. Furthermore the narrowing is
exposed to the simplifier which is generally a good thing.