[GHC] #13346: Run nofib with -fspec-constr-keen

[GHC]

#13346: Run nofib with -fspec-constr-keen
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        Reporter:  dfeuer            |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 I had a brief look at the Core and ticky profiles for one of the larger
 regressors, `cryptarithm2`, but unfortunately the differences are quite
 great so it's hard to tell precisely what is going wrong. I'm going to put
 this aside for now; at least we have characterized the situation.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13346#comment:2>
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