Re: [PATCH] Add MULT_HIGHPART_EXPR

[Richard Henderson]

On 2012-06-28 07:05, Jakub Jelinek wrote:
>       PR tree-optimization/51581
>       * tree-vect-stmts.c (permute_vec_elements): Add forward decl.
>       (vectorizable_operation): Handle vectorization of MULT_HIGHPART_EXPR
>       also using VEC_WIDEN_MULT_*_EXPR or builtin_mul_widen_* plus
>       VEC_PERM_EXPR if vector MULT_HIGHPART_EXPR isn't supported.
>       * tree-vect-patterns.c (vect_recog_divmod_pattern): Use
>       MULT_HIGHPART_EXPR instead of VEC_WIDEN_MULT_*_EXPR and shifts.
> 
>       * gcc.dg/vect/pr51581-4.c: New test.

Ok, except,

> +           if (0 && can_vec_perm_p (vec_mode, false, sel))
> +             icode = 0;

Testing hack left in.


r~