UseSuperWord - turned off, still emitting vector instructions?!

[Martin Stypinski]

I am benchmarking some algorithms, wondering how much the JIT applies
auto-vectorization. I set up a JMH project and am trying to turn
auto-vectorization off.


The code snipped, and the results can be found in the following gist:
https://gist.github.com/Styp/16e8a20fedfb771107377407fc1cf210 (Sorry too
long to post here).


The results indicate that one is faster than the other, which is expected.
Nevertheless, the deviation is so high that the benchmark is not
representative. What irritates me the most is that the version with turned
of SuperWord still contains vadd and vmove instructions in the
Jit-generated code. Do I miss something? How can I enforce vectorization
turned off for good?

Any ideas?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mail.openjdk.org/pipermail/discuss/attachments/20230817/7f3e1d0e/attachment.htm>