RE: Improve CRC32C performance on SSE4.2

Let me know if this fixes the failure. This is technically not a compiler bug.

> -----Original Message-----
> From: Devulapalli, Raghuveer <raghuveer(dot)devulapalli(at)intel(dot)com>
> Sent: Monday, June 16, 2025 4:53 PM
> To: Andy Fan <zhihuifan1213(at)163(dot)com>
> Cc: Nathan Bossart <nathandbossart(at)gmail(dot)com>; John Naylor
> <johncnaylorls(at)gmail(dot)com>; Jesper Pedersen <jesperpedersen(dot)db(at)gmail(dot)com>;
> Tomas Vondra <tomas(at)vondra(dot)me>; pgsql-hackers(at)lists(dot)postgresql(dot)org;
> Shankaran, Akash <akash(dot)shankaran(at)intel(dot)com>
> Subject: RE: Improve CRC32C performance on SSE4.2
>
> > Just be curious, what kind of optimization (like what -O2 does) could
> > mask this issue?
>
> >= -O1. Only -O0 shows this problem.
>
> Raghuveer
>
>