https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125809

--- Comment #4 from Drea Pinski <pinskia at gcc dot gnu.org> ---
(In reply to ptomsich from comment #3) 
> The .text section increases by ~1MB, so I expect issues on the
> frontend/i-cache side. 

Note text section increasing does not seem like corresponding to the 8% slower
either. There has to be something else. Maybe a later on optimization after the
inlining/const prop has happened that causes the slow down.

Like for an example a vectorization that was not happening before and the extra
branches to the scalar code is causing the slow down.
There is a lot of things that happen after clonining which could cause
problems. But just saying the cloning is not profitable is not correct here.

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