patch applied (ghc): Don' t dump floated bindings just outside a lambda

[Simon Peyton Jones]

Fri Feb  2 07:54:52 PST 2007  simonpj at microsoft.com
  * Don't dump floated bindings just outside a lambda
  
  We do not want the FloatOut pass to transform
  	f = \x. e
  to
  	f = let lvl = ... in \x.e
  
  The arity pinned on f isn't right any more; and see
  Note [Floating out of RHSs].
  
  Core Lint is now spotting the arity lossage (for a letrec), which is
  how I spotted this bug.
  
  I also re-jigged the code around floatBind; it's a bit tidier now.
    
  

    M ./compiler/simplCore/FloatOut.lhs -48 +48