On Fri, Aug 21, 2015 at 12:14 PM, Michael Zolotukhin via cfe-commits <
cfe-commits@lists.llvm.org> wrote:
> mzolotukhin added a comment.
>
> Oh, I see. So, you meant something like this?
>
> void foo(std::vector<float * __attribute__((nontemporal))> av, float *
> b, int N) {
> for (auto a: av) // << `a` doesn't have nontemporal attribute here
> for (int i = 0; i < N; i++)
> a[i] = b[i]+1;
> }
>
> One can easily work around it by using an explicit type here (`float *
> __attribute__((nontemporal))` instead of `auto`), but I agree that
> disappeared attribute might be a surprise for the user. Do you think it
> would be a frequent case?
>
> BTW, there are other type attributes, which also suffer from the same
> issue, e.g. `vector_size`. What was the rationale of making them type
> attributes?
vector_size produces a completely different type, with a different size,
alignment, different semantics and constraints for primitive operations,
and so on.
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