Test T12B

AArch64 T12B
{
0:X1=x; 0:X3=y;
1:X1=y; 1:X3=z; 1:X7=x;
}
P0           | P1               ;
MOV W0,#2    | LDR W0,[X1]      ;
STR W0,[X1]  | EOR W2,W0,W0     ;
MOV W2,#1    | ADD W2,W2,#1     ;
STLR W2,[X3] | STR W2,[X3]      ;
              | MOV W4,#2        ;
              | STR W4,[X3]      ;
              | LDR W5,[X3]      ;
              | EOR W6,W5,W5     ;
              | ADD W6,W6,#1     ;
              | STR W6,[X7]      ;
Observed
    z=2; x=2; 1:X5=2; 1:X0=1;