[GHC] #13745: Investigate compile-time regressions in regex-tdfa-1.2.2

[GHC]

#13745: Investigate compile-time regressions in regex-tdfa-1.2.2
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        Reporter:  bgamari           |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  high              |            Milestone:  8.2.3
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by rahulmutt):

 Before: 63205f719287cb011388b4beddf30d3229238b9f (DmdAnal in ghc-7.10.3a-
 release tag)

 After: b5b7d820afd8fca098bf1f4a7380d425ca6be31d

 I still need to merge in the recent occurrence analyzer changes since I
 recall reading that OneShotInfo is not longer handled in the demand
 analyzer and has moved to the occurence analyzer. Nonetheless, I don't
 think lack of OneShotInfo would cause the observed magnitude of code size
 difference, but I may be wrong.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13745#comment:17>
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