base + index register addressing

[Jeffrey A Law]

  In message <199710170919.WAA23619@ongaonga.chch.cri.nz>you write:
  > 
  > Here's a patch that I've found that improves register allocation
  > where the memory address is the sum of two registers.
Don't forgot those ChangeLog entries!

I've installed this patch into egcs.

Thanks,
jeff