[GHC] #4213: LLVM: Add support for TNTC to LLVM compiler suite

[GHC]

#4213: LLVM: Add support for TNTC to LLVM compiler suite
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              Reporter:  dterei      |             Owner:  dterei
                  Type:  feature     |            Status:  new
  request                            |         Milestone:  7.10.1
              Priority:  low         |           Version:  6.13
             Component:  Compiler    |          Keywords:
  (LLVM)                             |  Operating System:  Unknown/Multiple
            Resolution:              |   Type of failure:  None/Unknown
Differential Revisions:              |         Test Case:
          Architecture:              |          Blocking:
  Unknown/Multiple                   |
            Difficulty:  Unknown     |
            Blocked By:  9142        |
       Related Tickets:              |
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Comment (by bgamari):

 After reading Rafael's suggestion more closely it's not at all clear that
 this will do what we want (namely, it's unclear how one would actually
 attach code to the defined symbol). I've asked for further clarification
 although I suspect we'll need need to use LLVM's `symbol_offset` support
 to make this work. Hopefully we'll be able to get them to amend the
 semantics of this attribute to be more convenient for our purposes before
 3.5 is cut.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4213#comment:37>
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