Sudakshina Das <sudi....@arm.com> writes:
> Hi
>
> While looking at vect_model_reduction_cost function, it seems Richard's 
> change in a recent commit r278611 missed an update to the following if 
> condition. Since the check for EXTRACT_LAST_REDUCTION is now split 
> above, the same check in the if condition will never be true.
>
> gcc/ChangeLog
>
> 2019-xx-xx  Sudakshina Das  <sudi....@arm.com>
>
>       * tree-vect-loop.c (vect_model_reduction_cost): Remove
>       reduction_type check from if condition.
>
> Is this ok for trunk?

OK, thanks.

Richard

>
> Thanks
> Sudi
>
> diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c
> index ca8c818..7469204 100644
> --- a/gcc/tree-vect-loop.c
> +++ b/gcc/tree-vect-loop.c
> @@ -3933,7 +3933,7 @@ vect_model_reduction_cost (stmt_vec_info stmt_info, 
> internal_fn reduc_fn,
>        /* No extra instructions needed in the prologue.  */
>        prologue_cost = 0;
>  
> -      if (reduction_type == EXTRACT_LAST_REDUCTION || reduc_fn != IFN_LAST)
> +      if (reduc_fn != IFN_LAST)
>       /* Count one reduction-like operation per vector.  */
>       inside_cost = record_stmt_cost (cost_vec, ncopies, vec_to_scalar,
>                                       stmt_info, 0, vect_body);

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