patch applied (ghc): Improve inlining for INLINE non-functions

[Simon Peyton Jones]

Tue Dec  4 03:49:55 PST 2007  simonpj at microsoft.com
  * Improve inlining for INLINE non-functions
  	
  (No need to merge to 6.8, but no harm if a subsequent patch needs it.)
  
  The proximate cause for this patch is to improve the inlining for INLINE
  things that are not functions; this came up in the NDP project.  See
  Note [Lone variables] in CoreUnfold.
  
  This caused some refactoring that actually made things simpler.  In 
  particular, more of the inlining logic has moved from SimplUtils to 
  CoreUnfold, where it belongs.
  
  

    M ./compiler/coreSyn/CoreUnfold.lhs -40 +117
    M ./compiler/simplCore/SimplEnv.lhs -1 +1
    M ./compiler/simplCore/SimplUtils.lhs -54 +19
    M ./compiler/simplCore/Simplify.lhs -5 +3