[GHC] #9441: CSE should deal with letrec

[GHC]

#9441: CSE should deal with letrec
-------------------------------------+-------------------------------------
        Reporter:  dfeuer            |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.8.2
      Resolution:                    |             Keywords:  CSE
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Runtime           |            Test Case:  T9441a,
  performance bug                    |  T9441b, T9441c
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab: D5038
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by RolandSenn):

 * status:  closed => new
 * owner:  RolandSenn => (none)
 * resolution:  fixed =>


Comment:

 Reopen ticket to improve the tests according to the comments of @nomeata
 in [https://phabricator.haskell.org/D5038]

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9441#comment:11>
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