[GHC] #12618: Add saturated constructor applications to Core

[GHC]

#12618: Add saturated constructor applications to Core
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        Reporter:  simonpj           |                Owner:  nomeata
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by nomeata):

 Plan for #12689: Inline simple wrappers (like the ones that we add here)
 in the LHS of rules, so that are no worse off than before, and then figure
 out if we are actually getting the desired improvements with regard to
 nested tuples (re #5642).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12618#comment:29>
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