https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101891
Arjan van de Ven <arjan at linux dot intel.com> changed:
What |Removed |Added
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CC| |arjan at linux dot intel.com
--- Comment #7 from Arjan van de Ven <arjan at linux dot intel.com> ---
from a performance angle, the xor-only sequence is not so great at all; modern
CPUs are really good at eliminating mov's so that's why the code originally was
added to do a combo of xor and mov..
I can understand the security versus performance tradeoff.
(the original tuning was done to basically make it entirely free, so that it
could just be always enabled)
