combine and noop moves, take 2

[Richard Henderson]

On Fri, Jul 20, 2001 at 10:38:12PM +0200, Jan Hubicka wrote:
> Thinking about it more, I don't need update life, as it should be up-to-date
> already, because noop moves with REG_DEAD notes should be removed
> while updating life information after combine.

Um, actually, no.  We don't _always_ update life info after combine.

So: I think you should set need_refresh and refresh_blocks in
try_combine when you match a noop set, then call delete_noop_moves
before update_life_info.


r~