[GHC] #2450: Data.Complex.magnitude squares using ^(2 :: Int), which is slow

[GHC]

#2450: Data.Complex.magnitude squares using ^(2 :: Int), which is slow
-------------------------------+--------------------------------------------
    Reporter:  igloo           |       Owner:         
        Type:  bug             |      Status:  new    
    Priority:  normal          |   Milestone:  6.10.1 
   Component:  libraries/base  |     Version:  6.8.3  
    Severity:  normal          |    Keywords:         
  Difficulty:  Unknown         |    Testcase:         
Architecture:  Unknown         |          Os:  Unknown
-------------------------------+--------------------------------------------
 Data.Complex.magnitude squares using `^(2 :: Int)`, which is slow. Either
 it should use `sqr x = x * x` or a rule should rewrite `e ^ (2 :: Int)` to
 do so (or perhaps both; the RULE for general cases, and the manual `sqr`
 for hugs etc).

 More detail in this thread:
 http://www.haskell.org/pipermail/haskell-cafe/2008-July/045327.html

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2450>
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