(In reply to comment #22)
> bisect log

It does look like you're getting close to isolating a commit. Most likely it's
one of the remaining r600g commits, but there's still too many of them to guess
which one.

(In reply to comment #23)
> patch I used for compilation

Some of this looks a little dubious, but I guess it should do for the
bisection.

For the latest compile problem, have you tried manually applying the two revert
commits at the end of the remaining commits?