[GHC] #4463: CORE notes break optimisation

[GHC]

#4463: CORE notes break optimisation
---------------------------------+------------------------------------------
    Reporter:  rl                |        Owner:                         
        Type:  bug               |       Status:  new                    
    Priority:  normal            |    Milestone:                         
   Component:  Compiler          |      Version:  7.1                    
    Keywords:                    |     Testcase:                         
   Blockedby:                    |   Difficulty:                         
          Os:  Unknown/Multiple  |     Blocking:                         
Architecture:  Unknown/Multiple  |      Failure:  Runtime performance bug
---------------------------------+------------------------------------------
Changes (by choenerzs):

 * cc: choener@… (added)


Comment:

 I am that user ;-)

 They are very good for finding out if some piece of code is being
 correctly optimized -- if CORE notes don't interfere with optimization.
 Right now I just tag the outermost layer of code instead of smaller
 pieces, but they were very helpful in some cases.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4463#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler