extend.texi patch on how to specify clobbered inputs (was: Re: i386, asm and forbidden spilled registers...)

[Jeffrey A Law]

  In message < 199811031832.TAA01598@ignucius.axis.se >you write:
  > 
  > > Date: Tue, 03 Nov 1998 00:56:13 -0700
  > > From: Jeffrey A Law <law@upchuck.cygnus.com>
  > 
  > (recipient list shortened)
  > 
  > > This applies to both inputs and outputs -- ie, you can not show a registe
  > r
  > > as an output and also have it in the clobber list either.
  > 
  > Right; I was a bit too focused...  How about this instead?
Thanks.  Installed.
jeff