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

[GHC]

#6084: Add stg_ap_pnnv and related call patterns
---------------------------------+------------------------------------------
    Reporter:  SimonMeier        |       Owner:  simonmar        
        Type:  feature request   |      Status:  new             
    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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Comment(by tibbe):

 I don't understand this issue well enough to comment on details, but if
 it's true that continuation heavy code is helped by this change, should we
 also consider covering the call pattern of binary:

 {{{
 newtype Builder = Builder {
         runBuilder :: (Buffer -> IO L.ByteString)
                    -> Buffer
                    -> IO L.ByteString

 data Buffer = Buffer {-# UNPACK #-} !(ForeignPtr Word8)
                      {-# UNPACK #-} !Int                -- offset
                      {-# UNPACK #-} !Int                -- used bytes
                      {-# UNPACK #-} !Int                -- length left
     }
 }}}

 and attoparsec:

 {{{
 newtype Parser t a = Parser {
       runParser :: forall r. Input t -> Added t -> More
                 -> Failure t   r
                 -> Success t a r
                 -> IResult t r
     }

 newtype Input t = I {unI :: t}
 newtype Added t = A {unA :: t}
 type Failure t   r = Input t -> Added t -> More -> [String] -> String
                    -> IResult t r
 type Success t a r = Input t -> Added t -> More -> a -> IResult t r
 data More = Complete | Incomplete
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6084#comment:2>
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