[cfe-dev] Adding a new pragma to Clang

[Andrey Bokhanko]

I took liberty of starting a new thread on adding #pragma simd:
http://lists.cs.uiuc.edu/pipermail/cfe-dev/2014-February/035242.html

Andrey



On Wed, Feb 5, 2014 at 4:44 PM, Renato Golin <renato.golin at linaro.org>wrote:

> On 5 February 2014 12:27, Andrey Bokhanko <andreybokhanko at gmail.com>wrote:
>
>> I agree -- "omp simd" pragma doesn't cover everything you proposed
>> (certainly has nothing to do with unrolling). However, it is a part of an
>> accepted and widely used standard. Thus, if we (meaning the whole
>> community) want to introduce a method to control vectorization that we
>> advocate to be employed by end users and not as a debug tool by llvm
>> developers, this is, IMHO, the way to go.
>>
>
> Not a single argument against it. ;)
>
>
> If you volunteer to do code review, we can prepare patches (that implement
>> "omp simd" and rely on back-end support you implemented) and commit them.
>>
>
> I'm pretty sure others will as well, but feel free to copy me on the patch
> reviews.
>
> For an idea on what the metadata looks like, check the tests in
> src/test/Transforms/LoopVectorize/
>  * metadata-unroll.ll
>  * metadata-width.ll
>  * vectorize-once.ll
>  * X86/metadata-enable.ll
>  * X86/already-vectorized.ll
>
> cheers,
> --renato
>
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