[PATCH 3/4 v3] ivopts: Consider cost_step on different forms during unrolling

[Kewen.Lin]

Hi Segher,

on 2020/9/1 上午3:41, Segher Boessenkool wrote:
> Hi!
> 
> Just a note:
> 
> On Tue, Aug 25, 2020 at 08:46:55PM +0800, Kewen.Lin wrote:
>> 1) Currently address_cost hook on rs6000 always return zero, but at least
>> from Power7, pre_inc/pre_dec kind instructions are cracked, it means we
>> have to take the address update into account (scalar normal operation).
> 
> From Power4 on already (not sure about Power6, but does anyone care?)
> 

Thanks for the information, it looks this issue exists for a long time.

BR,
Kewen