[GHC] #6121: Very poor constant folding

[GHC]

#6121: Very poor constant folding
---------------------------------+------------------------------------------
    Reporter:  augustss          |       Owner:  igloo                  
        Type:  bug               |      Status:  new                    
    Priority:  high              |   Milestone:  7.6.1                  
   Component:  Compiler          |     Version:  7.4.1                  
    Keywords:                    |          Os:  Unknown/Multiple       
Architecture:  Unknown/Multiple  |     Failure:  Runtime performance bug
  Difficulty:  Unknown           |    Testcase:                         
   Blockedby:                    |    Blocking:                         
     Related:                    |  
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Changes (by simonmar):

  * owner:  => igloo
  * priority:  normal => high
  * milestone:  => 7.6.1


Comment:

 It looks like we should have constant folding for:

 {{{
 encodeFloatInteger :: Integer -> Int# -> Float#
 encodeDoubleInteger :: Integer -> Int# -> Double#

 decodeDoubleInteger :: Double# -> (# Integer, Int# #)

 doubleFromInteger :: Integer -> Double#
 floatFromInteger :: Integer -> Float#
 }}}

 which should be easy enough with the new Integer literals.  Ian, could you
 look into that?

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6121#comment:2>
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