[GHC] #13588: Simplify StgCase when all alternatives are the case binder

[GHC]

#13588: Simplify StgCase when all alternatives are the case binder
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        Reporter:  nomeata           |                Owner:  (none)
            Type:  task              |               Status:  closed
        Priority:  low               |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D3467
       Wiki Page:                    |
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Comment (by Joachim Breitner <mail@…>):

 In [changeset:"21c35bda8e435cfba1998fa8375a52a73fe570f4/ghc"
 21c35bda/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="21c35bda8e435cfba1998fa8375a52a73fe570f4"
 Simplify StgCases when all alts refer to the case binder

 as proposed in #13588.

 Differential Revision: https://phabricator.haskell.org/D3467
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13588#comment:4>
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