Follow-up Comment #4, bug #21805 (project avr-libc):
Another possible optimization I'm just noticing: the generated
code looks like:
ldi r24, 0xFF
ldi r25, 0x03
movw r30, r24
i.e. a parameter is passed in r24:25, and then moved into
r30:31. This might IMHO become more optimal (with the
compiler using r30:31 directly) by using the "z" constraint.
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