[GHC] #13080: Constant values are not floated out of the loop

[GHC]

#13080: Constant values are not floated out of the loop
-------------------------------------+-------------------------------------
        Reporter:  Feuerbach         |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by michaelt):

 By the way, `forever` isn't needed,  you can replace it with `(\x -> x >>
 x)` in Feuerbach's progam.  In the SO question the user noticed that the
 problem is solved by defining `poll a b` without explicit recursive use of
 `poll a b`.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13080#comment:8>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler