PPC b9 (BasicNine) "Simple sync test, avoid reg duplicates" {0:r6=1; 0:r4=x; 0:r5=y; 1:r4=x; 1:r5=y; x=0; y=0; 1:r7=z; 1:r8=t;} P0 | P1 ; stw r6,0(r4) | lwz r2,0(r5) ; lwsync | stw r2,0(r8) ; stw r6,0(r5) | lwz r1,0(r4) ; | stw r1,0(r7) ; exists (t=1 /\ z=0)