On Apr 22, 2014, at 12:07 PM, Hal Finkel <[email protected]> wrote:
> Hrmm; interesting. Is this the behavior we want? I'd be inclined to say that
> the pragma should imply safety.
I prefer to implement ‘unsafe’ vectorization with a separate pragma keyword. I
would like to discourage users from using this option because it can break the
correctness of their program, and I think that ’safe’ is a better default.
Vectorizing a loop in an ‘unsafe’ mode adds a risk and marking the loop with
the ‘unsafe’ keyword makes the decision explicit and documents.
I think that it is reasonable to require users to write: #pragma vectorize
unsafe width(4) …
Thanks,
Nadav
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