[ ghc-Bugs-1019758 ] SPECIALIZE pragma and polymorphic instances

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Bugs item #1019758, was opened at 2004-08-31 08:14
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Category: Compiler
Group: 6.2.1
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: SPECIALIZE pragma and polymorphic instances

Initial Comment:
Given a polymorphic specialization like

        f :: (Storable a, Eq a) => T a
        {-# SPECIALIZE f :: T (Ptr a) #-}

GHC does not produce the requested polymorphic
specialization, but if we use f at the ground types T
(Ptr Foo) and T (Ptr Bar), we get a specialization for
each, and these are essentially the same.

ross at soi.city.ac.uk

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