[GHC] #3034: divInt# floated into a position which leads to low arity

[GHC]

#3034: divInt# floated into a position which leads to low arity
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        Reporter:  batterseapower           |            Owner:
            Type:  bug                      |           Status:  new
        Priority:  lowest                   |        Milestone:  7.6.2
       Component:  Compiler                 |          Version:  6.10.1
      Resolution:                           |         Keywords:
Operating System:  Unknown/Multiple         |     Architecture:
 Type of failure:  Runtime performance bug  |  Unknown/Multiple
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:
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Comment (by simonpj):

 Might be worth trying making `primOpIsCheap` be true more often.  Perhaps
 always true.  Perhaps only if not out-of-line.  Or perhaps a new property.

 But we think it ''can'' be true of primops that can fail (like division),
 especially in lazy contexts like this one.

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/3034#comment:13>
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