https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120426
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Andrew Pinski from comment #2)
> With -mtune=sapphirerapids we get:
>
> <bb 2> [local count: 1073741824]:
> MEM <unsigned long> [(union *)lock_2(D)] = 0;
> MEM <unsigned long> [(union *)lock_2(D) + 8B] = 0;
> MEM <unsigned long> [(union *)lock_2(D) + 16B] = 1;
> MEM <vector(2) long unsigned int> [(union *)lock_2(D) + 24B] = { 0, 0 };
>
>
> Which is because we don't combine "memset"s into large ones yet.
> Which is PR 49872.
Do you have a patch I can try? Or I can extend STV pass to cover this
particular
case.
