[GHC] #9251: ghc does not expose branchless max/min operations as primops

[GHC]

#9251: ghc does not expose branchless max/min operations as primops
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        Reporter:  carter            |                   Owner:
            Type:  task              |                  Status:  new
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Compiler          |                 Version:  7.8.2
      Resolution:                    |                Keywords:  newcomer
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:  #9246             |  Differential Revisions:
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Comment (by carter):

 the idea is not to use it for the normal comparison code, but to make it
 available for those who need suitable supporting primops. *THOUGH* if we
 can provide suitable instruction level versions of the Ord based min and
 max, thats a thing we can think about too.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9251#comment:13>
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