[GHC] #9246: GHC generates poor code for repeated uses of min/max

[GHC]

#9246: GHC generates poor code for repeated uses of min/max
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        Reporter:  arotenberg               |            Owner:
            Type:  bug                      |           Status:  new
        Priority:  normal                   |        Milestone:
       Component:  Compiler                 |          Version:  7.8.2
      Resolution:                           |         Keywords:
Operating System:  Windows                  |     Architecture:  x86_64
 Type of failure:  Runtime performance bug  |  (amd64)
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:  #6135
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Comment (by simonpj):

 Yes, let-no-escape should be better documented.  And I feel bad that
 although it's terribly important for performance, it's entirely implicit
 in Core, and it's not hard for a transformation to inadvertently lose the
 LNE property.  I'd like it to be more explicit, somehow.

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9246#comment:9>
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