cvs commit: fptools/ghc/compiler/coreSyn CoreTidy.lhs

[Simon Peyton Jones]

simonpj     2001/07/25 02:19:41 PDT

  Modified files:
    ghc/compiler/coreSyn CoreTidy.lhs 
  Log:
  	---------------------------------
  	Another long-standing infelicity!
  	---------------------------------
  
  CoreTidy was throwing away demand info on let-binders.
  This meant that CorePrep would build a let (thunk) instead of
  a case, even if the Id is sure to be demanded.
  
  Easily fixed by making CoreTidy retain the demand info.
  
  This demand-analysis stuff is having the excellent side effect
  of flushing out performance bugs!
  
  Revision  Changes    Path
  1.51      +12 -3     fptools/ghc/compiler/coreSyn/CoreTidy.lhs