On Thu, Sep 6, 2012 at 8:25 PM, Iyer, Balaji V <balaji.v.i...@intel.com> wrote:
> Hello Richard,
> I forgot to answer one of questions. Please see it below:
>
> Thanks,
>
> Balaji V. Iyer.
>
>
>>+static tree
>>+handle_vector_attribute (tree *node, tree name ATTRIBUTE_UNUSED,
>>+ tree args ATTRIBUTE_UNUSED,
>>+ int ARG_UNUSED (flags), bool *no_add_attrs) {
>>+ tree opt_list;
>>+ VEC(tree,gc) *opt_vec = NULL;
>>+ opt_vec = make_tree_vector ();
>>+ VEC_safe_push (tree, gc, opt_vec, build_string (2, "O3"));
>>+ opt_list = build_tree_list_vec (opt_vec);
>>+ release_tree_vector (opt_vec);
>>+ handle_optimize_attribute (node, get_identifier ("optimize"), opt_list,
>>+ flags, no_add_attrs);
>>
>>Please no - do not use "optimize" attributes from inside the implementation.
>>What happens if the user also specifies an optimize attribute?
>>The above also doesnt' make sense to me, so please elaborate on why you want
>>to enable -O3 for a function marked with the vector attribute.
>
> The reason why I used optimize is because I would like to turn on the
> vectorizer. As far as I can tell, the only way to do that is to have -O3.
> Please advise if there is a better way to do so.
The answer is that you should not enable the vectorizer.
Richard.
