1.set noat, 2 # This should not cause warning for at to be turned off
2add at, r2, r2
3.set noat # this should turn the warnings off
4add at, r2, r2
5.set at, 3 # this should not turn the warnings on
6add at, r2, r2
7.set at # this should turn the warnings on
8add at, r2, r2
9