https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106562
--- Comment #2 from Dimitar Dimitrov <dimitar at gcc dot gnu.org> ---
With cbranchdi4 defined, the generated code is now 10 instructions:
test:
qbne .L5, r15, 0
qbeq .L4, r14, 0
.L5:
rsb r0, r16, 0
rsc r1, r17, 0
or r0, r0, r16
or r1, r1, r17
lsr r14, r1, 31
ret
.L4:
ldi r14, 0
ret
Defining BRANCH_COST=0, as avr backend does, shrinks the above to only 7
instructions.
