[GHC] #11731: Simplifier: Inlining trivial let can lose sharing

[GHC]

#11731: Simplifier: Inlining trivial let can lose sharing
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        Reporter:  nomeata           |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.1
      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 simonpj):

 Well, it all amounts to the same thing:
  * Introduce `share`
  * Use `let` to create sharing

 The rules for eliminating `share` would be the same as the rules governing
 inlining of trivial lets.  Which is preferable is largely an engineering
 choice.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11731#comment:12>
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