[GHC] #8814: 7.8 optimizes attoparsec improperly

[GHC]

#8814: 7.8 optimizes attoparsec improperly
--------------------------------------------+------------------------------
        Reporter:  joelteon                 |            Owner:
            Type:  bug                      |           Status:  new
        Priority:  normal                   |        Milestone:
       Component:  Compiler                 |          Version:  7.8.1-rc1
      Resolution:                           |         Keywords:
Operating System:  MacOS X                  |     Architecture:  x86_64
 Type of failure:  Runtime performance bug  |  (amd64)
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:  #8763
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Comment (by simonpj):

 But this ticket is about the ''run-time'' of the particular program given
 in the description of this ticket.

 There may well be another bug, to do with the ''compile-time'' of an
 entirely different program.  If so, could you open a ticket for that,
 including a way to reproduce?  (Having checked that there isn't one
 already.)

 It's confusing to mix up two bugs into one ticket!

 Thanks

 Simon

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8814#comment:13>
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