[Bug rtl-optimization/114243] [avr] -fsplit-wide-types bloats code by more than 50%

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114243

--- Comment #2 from Andrew Pinski  ---
Subreg improvements to ra is planned for gcc 15 as the riscv folks are running
into it for vector modes in some cases. Maybe that will improves the situation
here.

[Bug rtl-optimization/114243] [avr] -fsplit-wide-types bloats code by more than 50%

[gjl at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114243

--- Comment #1 from Georg-Johann Lay  ---
May be related to PR110093.  As Vladimir noted in

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110093#c5

the problem is that data flow analysis cannot cope with the subregs generated
from lower-subregs, and register alloc chokes at it.