Test LB+rel+CSEL3

AArch64 LB+rel+CSEL3
{
0:X5=x; 0:X4=y;
1:X4=y; 1:X5=x;
}
P0          | P1               ;
LDR W0,[X5] | LDR W3,[X4]      ;
MOV W2,#1   | CMP W0,#0        ;
STLR W2,[X4]| CSEL W1,W1,W3,EQ ;
            | MOV W8,#7        ;
            | STR W8,[X5]      ;
Observed
    1:X3=1; 0:X0=7;