Re: [PATCH] vect: Don't update inits for simd_lane_access DRs [PR102789]

[Jakub Jelinek via Gcc-patches]

On Mon, Oct 25, 2021 at 11:01:35AM +0800, Kewen.Lin wrote:
> gcc/ChangeLog:
> 
>       PR tree-optimization/102789
>       * tree-vect-loop-manip.c (vect_update_inits_of_drs): Do not
>       update inits of simd_lane_access.

Ok, thanks.

> diff --git a/gcc/tree-vect-loop-manip.c b/gcc/tree-vect-loop-manip.c
> index 4988c93fdb6..378b1026baa 100644
> --- a/gcc/tree-vect-loop-manip.c
> +++ b/gcc/tree-vect-loop-manip.c
> @@ -1820,7 +1820,8 @@ vect_update_inits_of_drs (loop_vec_info loop_vinfo, 
> tree niters,
>    FOR_EACH_VEC_ELT (datarefs, i, dr)
>      {
>        dr_vec_info *dr_info = loop_vinfo->lookup_dr (dr);
> -      if (!STMT_VINFO_GATHER_SCATTER_P (dr_info->stmt))
> +      if (!STMT_VINFO_GATHER_SCATTER_P (dr_info->stmt)
> +       && !STMT_VINFO_SIMD_LANE_ACCESS_P (dr_info->stmt))
>       vect_update_init_of_dr (dr_info, niters, code);
>      }
>  }

        Jakub