https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115825
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |7.1.0
Status|UNCONFIRMED |NEW
Last reconfirmed| |2024-07-08
Ever confirmed|0 |1
Target Milestone|--- |11.5
Target|avr |avr aarch64 x86_64
Summary|Loop unrolling increases |[11/12/13/14 Regression]
|code size with -Os |Loop unrolling increases
| |code size with -Os
Known to work| |6.3.0
CC| |pinskia at gcc dot gnu.org
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> For avr, we get:
>
> size: 5-4, last_iteration: 5-4
> Loop size: 5
> Estimated size after unrolling: 5
>
> So something is under-estimating the size after unrolling.
Maybe volatile stores should be increased with its size.
Note you get the same increase in size on aarch64 and x86_64 too.
started to happen between GCC 6 and GCC 7 even.
Confirmed.
