[Bug tree-optimization/53726] [4.8 Regression] aes test performance drop for eembc_2_0_peak_32

[Jan Hubicka]

> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53726
> 
> --- Comment #22 from Jan Hubicka <hubicka at ucw dot cz> 2012-06-22 22:45:35 UTC ---
> > Yes.  The question is what is "very small" and how can we possibly
> 
> As what is very small is defined in the i386.c in the cost tables.
> I simply run a small benchmark testing library&GCC implementations to
> fill it in.  With new glibcs these tables may need upating.  I updated them
> on some to make glibc in SUSE 11.x.
> 
> PR  43052 is about memcmp. Memcpy/memset should behave more or less sanely.
> (that also reminds me that I should look again at the SSE memcpy/memset
> implementation for 4.8)

That also reminds me that this tunning was mostly reverted with the SSE work.
I will look into that patches and push out the safe bits for 4.8

Honza