IRA copy heuristics

[Richard Sandiford]

Vladimir Makarov <vmakarov@redhat.com> writes:
> Richard Sandiford wrote:
>> But as I said to HJ, I'm happy to apply the DF patch in isolation,
>> as long as we accept that the benefit of fixing a correctness
>> regression outweighs the potential performance regression.
>>   
> Sure, regression is more important.  Therefore even if you submit only 
> one (reverse BB traverse) patch, it is ok for me.
>
> As I wrote I am going to look at the second patch.  I have feeling that 
> even without the second patch, there will be no performance regression.  
> I think that my latest patches (some of them are not in the mainline 
> yet) removed IRA instability toward allocno ordering.  I just need time 
> to make sure about this.

Great!  Thanks.  I'll test overnight and submit tomorrow if everything
goes OK.

Richard