[GHC] #6084: Add stg_ap_pnnv and related call patterns

[GHC]

#6084: Add stg_ap_pnnv and related call patterns
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    Reporter:  SimonMeier        |       Owner:  simonmar        
        Type:  feature request   |      Status:  infoneeded      
    Priority:  normal            |   Milestone:  7.8.1           
   Component:  Runtime System    |     Version:  7.4.1           
    Keywords:                    |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown    
  Difficulty:  Unknown           |    Testcase:                  
   Blockedby:                    |    Blocking:                  
     Related:                    |  
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Changes (by simonmar):

  * status:  new => infoneeded


Comment:

 The attached patch implements the idea I mentioned above.  It makes zero
 difference on nofib as far as I can tell.  If someone could try it on the
 bytestring Builder or something else that needs this optimisation and let
 me know the results, that would be great.  I want to be sure it's a win
 before putting it in.  Note that it only takes effect with -O2.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6084#comment:7>
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