patch applied (ghc): Refactor to combine two eqExpr functions

[Simon Peyton Jones]

Wed Dec 16 00:50:33 PST 2009  simonpj at microsoft.com
  * Refactor to combine two eqExpr functions
  Ignore-this: 925dec0fc9af1e0a9359226359627ae7
  
  I'd forgotten that Rules.lhs already has an eqExpr function.  This
  patch combines Rules.eqExpr with the (recent) CoreUtils.eqExpr.
  
  I also did a little refactoring by defining CoreSyn.expandUnfolding_maybe
  (see Note [Expanding variables] in Rules.lhs), and using it in
       a) CoreUnfold.exprIsConApp_maybe
       b) Rule matching

    M ./compiler/coreSyn/CoreSyn.lhs -1 +8
    M ./compiler/coreSyn/CoreUnfold.lhs -6 +4
    M ./compiler/coreSyn/CoreUtils.lhs -27 +61
    M ./compiler/specialise/Rules.lhs -78 +7

View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20091216085033-1287e-88e4127e3534067dc77084a26582735d2165ebbd.gz