On Mon, 16 Jan 2012, Paul S wrote: > In the port I'm working on I have used the newer CC tracking technique (i.e. > not cc0). I have followed the directions at the top of compare-elim.c and have > the following pattern for addhi3
> I'm clearly missing something... can anyone provide a hint ? You're running into one of the grievances with cc0 conversion: all the single_set users. Don't expose the CC register as being set until after reload, and in particular not from moves and adds, reload makes heavy use of those. Make a parallel with a clobber of it instead. Then have your pattern above with "reload_completed" instead of "" as its condition. (Or a shorter hint, do what other non-cc0 ports do. :) brgds, H-P
