[Bug middle-end/110832] [14 Regression] 14% capacita -O2 regression between g:9fdbd7d6fa5e0a76 (2023-07-26 01:45) and g:ca912a39cccdd990 (2023-07-27 03:44) on zen3 and core

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110832

Uroš Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
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--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Richard Biener from comment #3)
> Maybe r14-2786-gade30fad6669e5

Yes. This is the cost to sanitize operands before every operation.

However, we can recover the performance for -funsafe-math-optimizations with
the patch, attached to the previous message, from:

      21,592075559 seconds time elapsed
to:
      20,047717312 seconds time elapsed