Test ARMv8-csel-addr-isb+BIS

AArch64 ARMv8-csel-addr-isb+BIS
{ 0:X7=x; 0:X8=y; 0:X9=u; int *0:X2; 1:X7=x; 1:X8=y; }
P0               | P1          ;
LDR W1,[X7]      | MOV W0,#1   ;
CMP W1,#0        | STR W0,[X8] ;
CSEL X2,X8,X9,NE | DMB ST      ;
LDR W4,[X2]      | MOV W2,#1   ;
ISB              | STR W2,[X7] ;
LDR W3,[X8]      |             ;
Observed
    0:X4=0; 0:X3=1; 0:X1=1;