[GHC] #7105: Better names for derived SCCs of instances

[GHC]

#7105: Better names for derived SCCs of instances
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 Reporter:  ksf               |          Owner:                  
     Type:  feature request   |         Status:  new             
 Priority:  normal            |      Component:  Compiler        
  Version:  7.4.2             |       Keywords:                  
       Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
  Failure:  None/Unknown      |       Testcase:                  
Blockedby:                    |       Blocking:                  
  Related:                    |  
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 Currently, -fprof-auto generated SCCs are named after their function name,
 which isn't very helpful if you have a dozen types in Types.hs and the
 profile is telling you that much time is spend in "compare" and "put" in
 that very module. It's even more painful if those instances are derived
 and you can't easily add manual annotations.

 I suggest annotating instance declarations in general with their concrete
 type, such as "compare/Foo" and "compare/Bar"

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7105>
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