On 17/04/15 09:26 AM, Matthew Fortune wrote:
Wilco Dijkstra writes:
While investigating why the IRA preferencing algorithm often chooses
incorrect preferences from the costs, I noticed this thread:
https://gcc.gnu.org/ml/gcc/2011-05/msg00186.html
I am seeing the exact same issue on AArch64 -
Interestingly even when the preferences are accurate, lra_constraints
completely ignores the preferred/allocno class. If the cost of 2 alternatives
is equal in every way (which will be the case if they are both legal matches
as the standard cost functions are not used at all), the wrong one may be
> Matthew Fortune wrote:
> Wilco Dijkstra writes:
> > While investigating why the IRA preferencing algorithm often chooses
> > incorrect preferences from the costs, I noticed this thread:
> > https://gcc.gnu.org/ml/gcc/2011-05/msg00186.html
> >
> > I am seeing the exact same issue on AArch64 - dur
Wilco Dijkstra writes:
> While investigating why the IRA preferencing algorithm often chooses
> incorrect preferences from the costs, I noticed this thread:
> https://gcc.gnu.org/ml/gcc/2011-05/msg00186.html
>
> I am seeing the exact same issue on AArch64 - during the final
> preference selection
