patch applied (ghc): Recursively call cmmMachOpFold on divides that we turned into shifts

[Simon Marlow]

Tue Feb  8 02:43:45 PST 2011  Simon Marlow <marlowsd at gmail.com>
  * Recursively call cmmMachOpFold on divides that we turned into shifts
  There might be more simplification to do.

    M ./compiler/cmm/CmmOpt.hs -3 +3

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc;a=darcs_commitdiff;h=20110208104345-12142-ae2a15add8470b0c873b63f2b17366727ceb594b.gz