2.95, x86: severe performance problems with short arithmetic

[Jeffrey A Law]

  In message < 199908122020.NAA24484@zack.bitmover.com >you write:
  > I did.  One problem leaps out at me:  PROMOTE_MODE does math in HImode
  > and fixes up the registers afterward - for example:
Ugh.  Why don't you look at WORD_REGISTER_OPERATIONS or something like that,
which may be a better alternative.

jeff