[cfe-dev] Adding a new pragma to Clang

Arnold Schwaighofer aschwaighofer at apple.com
Wed Jan 8 10:41:06 PST 2014

On Jan 8, 2014, at 8:43 AM, Renato Golin <renato.golin at linaro.org> wrote:

> On 8 January 2014 14:48, Alp Toker <alp at nuanti.com> wrote:
> I'll think about this a bit more and see if it's viable. Very smart idea from Aaron if we can make it work in some form.
> Hi Alp,
> Following the discussions in the IRC, I think we might have some entry point into the vectorizer metadata using C++11 attributes first, than pragmas later.
> Having tried to add a pragma, I know how hard it is, and given the high levels of community interest, I think starting with the attributes will be the fastest way to get it working.
> Arnold,
> Do you think this would be a set-back? Having C++11 handled, we can at least start creating specialized tests and benchmarks, which is the most important thing for the vectorizer right now. How the pragmas will behave is a matter for further discussion, but in the end, both attribute and pragma should generate the same metadata in IR.

Could we enable c++ attribute syntax for c99 (via a command line flag)?

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