[Bug middle-end/77484] [6/7 Regression] Static branch predictor causes ~6-8% regression of SPEC2000 GAP

["hubicka at ucw dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77484

--- Comment #39 from Jan Hubicka <hubicka at ucw dot cz> ---
> Finally, the total between after the last and before the first patch.  Overall,
> some tests gain some performance and others lose some.  The total number of
> instructions has grown somewhat (especially tonto, calculix, dealII and wrf),
> but there's no obvious connection between an increased number of instructions
> and loss of performance.
> 
> Is this what can be expected of the patches?

I would say so - the prediction controls a lot of different heuristics
and call predictor is quite weak (random) so it is expected to have bit random
effects.

I also can't see much of corelation in the tests, so I guess it is just
random noise.  Thanks for the tests!

Honza