[Bug target/91189] 20% binary size regression in avr-gcc 9.1.0 from 8.3.0

[gjl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91189

--- Comment #2 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
How did you conclude it's a target issue? Would you pinpoint where in the avr
backend the problem is?