[PATCH, i386] Introduce switch for Skylake Server CPU.

[Jakub Jelinek]

On Mon, Sep 21, 2015 at 05:14:45PM +0300, Kirill Yukhin wrote:
> Hello,
> This patch introduces switches necessary for new Intel Server CPU
> (code-named Skylake).
> 
> Bootstrapped & regtested.
> 
> Is it ok for trunk?
> 
> gcc/
> 	* config.gcc: Support "skx".
>         * config/i386/i386-c.c (ix86_target_macros_internal): Handle
>         PROCESSOR_SKX.
>         * config/i386/i386.c (m_SKX): Define.
>         (processor_target_table): Add "skx".
>         (PTA_SKX): Define.
> 	(ix86_option_override_internal): Add "skx".
>         (fold_builtin_cpu): Handle "skx".
>         * config/i386/i386.h (TARGET_SKX): Define.
>         (processor_type): Add PROCESSOR_SKX.
>         * config/i386/i386.md (attr "cpu"): Add knl.
>         * config/i386/x86-tune.def: Add m_KNL.
> 
> gcc/testsuite/
>         * gcc.target/i386/funcspec-5.c: Test avx512vl, avx512bw,
> 	avx512dq, avx512cd, avx512er, avx512pf and skx.

Is it a good idea to introduce further abbrevs like this?
I thought we went away from e.g. slm to silvermont, we didn't
introduce hsw but haswell, etc.
So, wouldn't it be better to add skylake-xeon instead of skx?

	Jakub