[GHC] #14295: tagToEnum# leads to some silly closures

[GHC]

#14295: tagToEnum# leads to some silly closures
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        Reporter:  dfeuer            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:  datacon-tags
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 Really?  I get
 {{{
 ==================== STG syntax: ====================
 Foo.foo
   :: forall a.
      (GHC.Types.Int -> a) -> GHC.Prim.Int# -> GHC.Prim.Int# -> a
 [GblId, Arity=3, Caf=NoCafRefs, Unf=OtherCon []] =
     \r [f_s1av x_s1aw y_s1ax]
         let {
           sat_s1az [Occ=Once] :: GHC.Types.Int
           [LclId] =
               \u []
                   case quotInt# [x_s1aw y_s1ax] of wild_s1ay {
                     __DEFAULT -> GHC.Types.I# [wild_s1ay];
                   };
         } in  f_s1av sat_s1az;
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14295#comment:9>
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