RFC: Enable vectorization of call instructions in the loop vectorizer

[Philip Reames]

On 12/16/13 9:08 AM, James Molloy wrote:
>
> So the version attached reads metadata attached to CallInsts. The 
> schema for the metadata is detailed in the proposed LangRef addition, 
> but basically it describes a list of potential vectorization 
> candidates. Each candidate has a vector width, a llvm::Function* (or 
> MDString) giving the target function and a string describing how the 
> function arguments need to be handled.
>
Specifically with regards to metadata, why is the metadata on the call 
site not the function declaration?  I would expect that a call to "cos" 
would always vectorize to the same "cos4".  Is supporting different 
vectorizations at different points of the program a key goal?

Ignoring most of the discussion since it seems like a good conclusion 
has been reached.

Yours,
Philip Reames
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20131217/ffa1a4e1/attachment.html>