Test Pick0

AArch64 Pick0
{
0:X1=x; 0:X3=y;
1:X1=y; 1:X3=z; 1:X7=x;
}
P0           | P1                  ;
MOV W0,#1    | LDR W0,[X1]         ;
STR W0,[X1]  | CBNZ W0,LC00        ;
MOV W2,#1    | LC00:               ;
STLR W2,[X3] | MOV W2,#1           ;
              | STR W2,[X3]         ;
       | SWP W4,W4,[X3]      ;
              | EOR W5,W4,W4        ;
              | LDR W6,[X7,W5,SXTW] ;
Observed
    1:X6=0; 1:X0=1;