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

[GHC]

#2450: Data.Complex.magnitude squares using ^(2 :: Int), which is slow
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        Reporter:  igloo                    |            Owner:
            Type:  bug                      |           Status:  closed
        Priority:  lowest                   |        Milestone:  7.6.2
       Component:  libraries/base           |          Version:  6.8.3
      Resolution:  fixed                    |         Keywords:
Operating System:  Unknown/Multiple         |     Architecture:
 Type of failure:  Runtime performance bug  |  Unknown/Multiple
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:
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Changes (by monoidal):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 You are right, I see that originally the bug was left open because of
 missing rewrite rules (https://github.com/ghc/packages-
 base/commit/d6adf6bd595c3b8f750acc9293f5847f176b521b) but they were added
 in #5237. Thanks!

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2450#comment:15>
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