[GHC] #1498: Optimisation: eliminate unnecessary heap check in recursive function

[GHC]

#1498: Optimisation: eliminate unnecessary heap check in recursive function
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        Reporter:  simonmar          |            Owner:
            Type:  bug               |           Status:  new
        Priority:  low               |        Milestone:  7.6.2
       Component:  Compiler          |          Version:  6.6.1
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  Runtime           |       Difficulty:  Moderate (less
  performance bug                    |  than a day)
       Test Case:                    |       Blocked By:  4258
        Blocking:                    |  Related Tickets:
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Comment (by NeilMitchell):

 http://neilmitchell.blogspot.co.uk/2014/01/optimising-haskell-for-tight-
 inner-loop.html - the code in version 4/version 5 includes a small example
 of the bug.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/1498#comment:22>
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