On Wed, Mar 23, 2011 at 01:55:34PM -0700, Richard Henderson wrote:
> I can't see how emitting a NULL_RTX should be a Good Thing, ever,
> and thus I don't see why we should be doing special things to
> handle it.
Ah, I thought the same thing and gcc_assert'ed emitting a NULL_RTX. I
didn't get very far; at least reload (and possibly other places) assume
that they can do something like:
x = NULL_RTX;
...do something maybe setting x to a useful pattern...
...emit x unconditionally...
I can look into just how many places might need to be fixed up because
of this, but scattering a bunch of ifs all over the place seemed less
elegant than handling it all in the emit* functions.
-Nathan
