patch applied (ghc): Use the most complex form of addressing modes on x86

[Simon Marlow]

Thu Mar  1 03:26:25 PST 2007  Simon Marlow <simonmar at microsoft.com>
  * Use the most complex form of addressing modes on x86
  We had a pattern that matched (base+(index<<N)), but not
  (base+(index<<N)+M).

    M ./compiler/nativeGen/MachCodeGen.hs -9 +22