[Bug 221029] AMD Ryzen: strange compilation failures using poudriere or plain buildkernel/buildworld

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221029

--- Comment #50 from Don Lewis <truckman at FreeBSD.org> ---
(In reply to Conrad Meyer from comment #48)
Interesting link.  I've been hearing rumors about this, but this is the first
detailed info that I've seen.

Speculative execution is one of the things that came to mind with the signal
trampoline issue.  In this case, I would think that speculative execution would
not get past the ret instruction.

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