[GHC] #8855: LLVM backend needs to use `-globalopt` explicitly

[GHC]

#8855: LLVM backend needs to use `-globalopt` explicitly
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        Reporter:  bgamari           |            Owner:
            Type:  bug               |           Status:  patch
        Priority:  normal            |        Milestone:  7.8.1
       Component:  Compiler          |          Version:  7.8.1-rc1
      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):

 I'll update my patch accordingly. Thanks for the analysis!

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8855#comment:3>
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