[GHC] #13563: Avoid redundant MOVes in generated code

[GHC]

#13563: Avoid redundant MOVes in generated code
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        Reporter:  alexbiehl     |                Owner:  (none)
            Type:  bug           |               Status:  new
        Priority:  normal        |            Milestone:
       Component:  Compiler      |              Version:  8.0.2
      Resolution:                |             Keywords:
Operating System:  Windows       |         Architecture:  x86_64 (amd64)
 Type of failure:  None/Unknown  |            Test Case:
      Blocked By:                |             Blocking:
 Related Tickets:                |  Differential Rev(s):
       Wiki Page:                |
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Comment (by alexbiehl):

 I would upload the source file which triggers this behaviour but trac
 gives me an error when trying to upload an attachment.

 Please take a look here for `line.hs`
 https://gist.github.com/alexbiehl/a23238ddd0173e05b49a114c55105462

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13563#comment:1>
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