[GHC] #13193: Integer (gmp) performance regression?

[GHC]

#13193: Integer (gmp) performance regression?
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        Reporter:  j.waldmann        |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:  newcomer
Operating System:  Linux             |         Architecture:  x86_64
 Type of failure:  Runtime           |  (amd64)
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by rwbarton):

 Interesting. Looks like your test was before Phab:D3034 landed, so maybe
 that will help some.

 There was another difference unrelated to integer-gmp when I compared the
 Core for 7.8 and 7.10, with something getting marked as one-shot in 7.10.
 I didn't investigate that closely (and I also found it very hard to
 understand what this benchmark program does). I may take another look
 later, but unlikely to be in the immediate future.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13193#comment:12>
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