[GHC] #11120: Missing type representations

[GHC]

#11120: Missing type representations
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        Reporter:  goldfire          |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  high              |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  7.11
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1774
       Wiki Page:                    |
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Comment (by simonpj):

 The code is
 {{{
 trTyConDataCon :: DataCon
 trTyConDataCon = pcDataCon trTyConDataConName [] [fprint, fprint,
 trModuleTy, trNameTy] trTyConTyCon
   where
     -- TODO: This should be for the target, no?
 #if WORD_SIZE_IN_BITS < 64
     fprint = word64PrimTy
 #else
     fprint = wordPrimTy
 #endif
 }}}
 Question: why is `trTyConTyCon` wired in at all?  Its only use is in
 `TcTypeable` which could perfectly well look it up in the envt (it would
 need to be a known-key name).    We should never wire-in type constructors
 without a pressing reason.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11120#comment:32>
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