[PATCH] Teach X86 builtins which target features they require

[Justin Bogner]

Eric Christopher <echristo at gmail.com> writes:
> Thank you for the somewhat ridiculous amount of typing there :)
>
> Might need some changes when I use it, but obviously having the information
> there is better than not so LGTM :)

r243908

>
> -eric
>
> On Mon, Aug 3, 2015 at 3:08 PM Justin Bogner <mail at justinbogner.com> wrote:
>
>     This adds the required target feature names to x86 builtins that need
>     particular features. Most have exactly one ("avx", "aes", etc), but some
>     of the avx512 features have multiple requirements, eg "avx512vl,avx512bw".
>    
>     Eric: this should be what you need to implement the warning for using
>     functions with unsatisfied target requirements for builtins.