[GHC] #13230: Something strange with "Don't use the splitter on Darwin"

[GHC]

#13230: Something strange with "Don't use the splitter on Darwin"
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           Reporter:  rwbarton       |             Owner:  rwbarton
               Type:  task           |            Status:  new
           Priority:  high           |         Milestone:  8.2.1
          Component:  Compiler       |           Version:  8.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 Commit 266a9dc4cd34008f1162eb276032c85ef8371842 "Don't use the splitter on
 Darwin" sounds like it should only affect Darwin, but the perf results
 indicate otherwise, even though perf.haskell.org builds are done on a
 linux machine:
 https://perf.haskell.org/ghc/#revision/266a9dc4cd34008f1162eb276032c85ef8371842

 Total build time went up 13.7% and all nofib object sizes became much
 larger. I suspect the splitter was disabled completely.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13230>
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