[x86 PATCH] Improve performance for Haswell family.

[H.J. Lu]

On Thu, Sep 10, 2015 at 9:39 AM, Yuri Rumyantsev <ysrumyan@gmail.com> wrote:
> Hi All,
>
> Here is updated patch introducing new .md file describing Haswell
> pipeline. Reassociation width for float-point instructions was
> increased to 4 for Haswell family.
>
> Regression testing did not show any new failures.
> Is it OK for trunk?
>
> ChangeLog
> 2015-09-10  Yuri Rumyantsev  <ysrumyan@gmail.com>
>
> * config/i386/haswell.md: New file describing Haswell pipeline.
> * config/i386/i386.c (processor_alias_table): Use CPU_HASWELL for
> haswell-like processors.
> (ix86_reassociation_width): Increase reassociation width for 64-bit
> Haswell processor family.
> * config/i386/i386.md: Introduce haswell cpu and include new md file.

I think ix86_reassociation_width change should be in a separate
patch and can be changed in now:

https://gcc.gnu.org/ml/gcc-patches/2015-08/msg00774.html

-- 
H.J.