PPC i3 (IThree) "WR reordering, iwp2.3a" {0:r5=x; 0:r6=y; 1:r5=x; 1:r6=y; x=0; y=0;} P0 | P1 ; li r1,1 | li r3,1 ; stw r1,0(r5) | stw r3,0(r6) ; lwz r2,0(r6) | lwz r4,0(r5) ; | ; locations [0:r2;1:r4;] exists(0:r2=0 /\ 1:r4=0)