[G]CSE of extended asm statements

[Jeffrey A Law]

  In message < 200008301937.MAA29779@wilson.cygnus.com >you write:
  > By the way, the current emit_group_{store,load} stuff is still not sufficie
  > nt
  > to describe all ABIs.  There is a corner case in the IA-64 ABI that can not
  > be handled by gcc currently.  The problem is that we can specify a location
  > and number of bytes, but we can not specify alignment in registers.  The
  > current code assumes that values in registers are always left-justified for
  > big-endian and right-justified for little endian.  The IA-64 ABI needs most
  > ly
  > right justified partial register values, but there is one corner case that
  > needs left justified partial register values, and we get that corner case
  > wrong.
FWIW, Graham has a patch which allows us to attack this problem (the PA
has similar characteristics).  We need to get that patch reviewed.

jeff