[GHC] #9142: LLVM HEAD rejects aliases used by LLVM codegen

[GHC]

#9142: LLVM HEAD rejects aliases  used by LLVM codegen
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        Reporter:  bgamari           |            Owner:
            Type:  bug               |           Status:  new
        Priority:  high              |        Milestone:
       Component:  Compiler          |          Version:  7.8.2
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by bgamari):

 According to folks in `#llvm`, aliases are currently in a sad state and
 need to be rewritten. Attached above is a hack to allow bitcasts in
 aliasee position. I'll need to talk to more LLVM folks to see how to
 proceed from here.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9142#comment:2>
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