Yet another DOM memory improvement

[Jeffrey A Law]

On Wed, 2004-09-22 at 08:55, Jan Hubicka wrote:
> The DOM iteration seems to be pretty expensive thing.  Did you
> considered trottling it to 1 iteration by -fexpensive-optimizations so
> it is disabled for -O1?
As I've said before, I'm looking into avoiding the iteration step
completely.  However, that's not going to get into GCC 4.

If you want to throttle it so that the iteration step doesn't
happen unless -fexpensive-optimizations, then that's fine.  Or
better yet, use the existing switch for controlling the dominator
pass.  ie, instead of on/off, off, max # of iterations.

jeff