[ofiwg] allowing aliasing in fetch atomics?

[Dave Goodell (dgoodell)]

On Nov 11, 2015, at 2:01 PM, Jeff Hammond <jeff.science at gmail.com> wrote:
> 
> Why do memcpy and memmove both exist?  Why did C99 introduce restrict?  Why does Fortran prohibit aliasing?
> 
> I have measured the benefits of restrict semantics w.r.t. vectorization many times in the past, enough that I did not bother to benchmark this specific case.

But you already offered a fix for that issue, which was to just have two versions of the implementation to handle aliased/non-aliased.  The overlap check is pretty cheap.

-Dave