[GHC] #3034: divInt# floated into a position which leads to low arity

[GHC]

#3034: divInt# floated into a position which leads to low arity
--------------------------------------+-------------------------------------
 Reporter:  batterseapower            |          Owner:                  
     Type:  run-time performance bug  |         Status:  new             
 Priority:  normal                    |      Milestone:                  
Component:  Compiler                  |        Version:  6.10.1          
 Severity:  normal                    |     Resolution:                  
 Keywords:                            |       Testcase:                  
       Os:  Unknown/Multiple          |   Architecture:  Unknown/Multiple
--------------------------------------+-------------------------------------
Comment (by twhitehead):

 For some reason, using quot instead of div produces the desired code.
 This is despite quotInt# not being cheap according to ghci 6.10.1

 Prelude> PrimOp.primOpIsCheap PrimOp.IntQuotOp
 False

 Maybe it has something to do with there being a primitive IntQuotOp but
 not a corresponding IntDivOp (tidy core gives GHC.Prim.quotInt# versus
 GHC.Base.divInt#)

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3034#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler