LISA auto/LB-LWR+R-A+OB-O+R-Oc+R-Oc (* * Result: Sometimes * P1-P2 rf OB-O: Never->Maybe: Note lack of C11 guarantee, no synchronizes-with * P2-P3 rf R-Oc: Note lack of C11 guarantee, control dependency * P3 Oc,R: Note lack of C11 guarantee * P3-P4 rf R-Oc: Note lack of C11 guarantee, control dependency * P4 Oc,LWR: Maybe->Sometimes: Control dependencies do not order trailing reads *) { 3:r4=1; 4:r4=1; } P0 | P1 | P2 | P3 | P4 ; w[once] u0 3 | r[acquire] r1 x1 | r[once] r1 x2 | r[once] r1 x3 | r[once] r1 x4 ; w[release] x1 1 | f[mb] | w[release] x3 1 | mov r4 (neq r1 r4) | mov r4 (neq r1 r4) ; | w[once] x2 1 | | b[] r4 CTRL3 | b[] r4 CTRL4 ; | | | w[release] x4 1 | r[once] r2 u0 ; | | | CTRL3: | CTRL4: ; Observed 4:r2=0; 4:r1=1; 3:r1=1; 2:r1=1; 1:r1=1;