[GHC] #8974: 64 bit windows executable built with ghc-7.9.20140405+LLVM segfaults

[GHC]

#8974: 64 bit windows executable built with ghc-7.9.20140405+LLVM segfaults
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        Reporter:  awson            |                Owner:
            Type:  bug              |               Status:  upstream
        Priority:  high             |            Milestone:  8.2.1
       Component:  Compiler (LLVM)  |              Version:  7.9
      Resolution:                   |             Keywords:
Operating System:  Windows          |         Architecture:  x86_64 (amd64)
 Type of failure:  Runtime crash    |            Test Case:
      Blocked By:                   |             Blocking:
 Related Tickets:                   |  Differential Rev(s):
       Wiki Page:                   |
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Comment (by awson):

 In fact, GHC HEAD with LLVM 3.7 doesn't have this bug and works without
 any modifications.

 OTOH, 7.10.x with LLVM 3.5 still doesn't work and requires something like
 the patch I've put here.

 Perhaps, we can close this ticket as fixed for GHC 8.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8974#comment:33>
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