SMALL_REGISTER_CLASSES

[Jeffrey A Law]

  In message < 9801262039.AA35348@rios1.watson.ibm.com >you write:
  > 	The MD file can clobber a match_scratch of the single register
  > class but asm statements do not appear to be able to express the same
  > thing.  Geoff Keating and I were wondering if clobbering a specific
  > register in a class containing only that register should not automatically
  > be converted into a match_scratch of that register class?  Is there any
  > reason this is not done or cannot be done?  This or something similar
  > would seem to solve the problem and prevent the GCC spill error.
Interesting.  I can't think of a reason why this couldn't be done, and it
would certainly help (but not completely solve) these problems.

jeff