Re: [PATCH] RISC-V: Use gather_load_cost and scatter_store_cost

[Zhongyao Chen]

On Wed, Nov 11, 2026 at 10:30 PM Robin Dapp <rdapp....@gmail.com> wrote:
>
> > Even though we define gather_load_cost and scatter_store_cost in the
> > cost tables, they are never actually used for IFN gather/scatters.
> > This is because the vectorizer costs them as scalar loads and stores
> > instead of dedicated vector_gather_load / vector_scatter_store
> > operations.
> >
> > This patch makes the cost model recognize VMAT_GATHER_SCATTER_IFN and
> > use the proper table costs.
>
> Hehe, I actually have a vectorizer fix for this in flight that I'm going
> to send to day.  I want us to emit vect_gather_load/store instead of
> ab-using the scalar cost kind (and then backtracking).
>
> So please wait a bit with this.
>
>
> --
> Regards
>  Robin
>

OK.


-- 
Regards,
Zhongyao