[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 luite):

 Oh I'm sorry, I expected the problem to be known due to the `TODO: This
 should be for the target, no?` remark in the code.

 GHCJS configures the GHC API through `DynFlags` to produce 32 bit code.
 The GHC code was reworked to support changing the target dynamically. For
 example in `PrelRules` the `WORD_SIZE_IN_BITS` constant was replaced by
 `wordSizeInBits dflags`(which in turn uses `targetPlatform` from `dflags`)
 in various places.

 Unfortunately the use of the `WORD_SIZE_IN_BITS` macro in `TysWiredIn`
 means that `TyCon` gets `Word#` fields with a 64 bit GHC library, even if
 `wordSizeInBits dflags == 32`. It should get `Word64#` fields. GHC should
 really use the `DynFlags` word size value in `trTyConDataCon` (similar to
 for example `PrelRules.shiftRightLogical`)

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11120#comment:31>
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