[GHC] #765: x86_64 NCG goes via unsigned for FFI Int return types.

[GHC]

#765: x86_64 NCG goes via unsigned for FFI Int return types.
------------------------------------------+---------------------------------
  Reporter:  duncan.coutts at worc.ox.ac.uk  |          Owner:                
      Type:  bug                          |         Status:  new           
  Priority:  high                         |      Milestone:                
 Component:  Compiler (NCG)               |        Version:  6.4.2         
  Severity:  normal                       |     Resolution:                
  Keywords:                               |             Os:  Linux         
Difficulty:  Unknown                      |   Architecture:  x86_64 (amd64)
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Comment (by guest):

 Note that if we declare the foreign import with CInt then we get the right
 answer.

 {{{
 foreign import ccall unsafe "c_id" c_id :: CInt -> IO CInt
 }}}

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/765>
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