Fast Computation of Strong Control Dependencies
|Year of publication
|Article in Proceedings
|Computer Aided Verification - 33rd International Conference, CAV 2021, Virtual Event, July 20-23, 2021, Proceedings, Part II
|MU Faculty or unit
|control dependence;non-termination sensitive control dependence;decisive order dependence;control closure;ntscd;dod;graph theory
|We introduce new algorithms for computing non-termination sensitive control dependence (NTSCD) and decisive order dependence (DOD). These relations on vertices of a control flow graph have many applications including program slicing and compiler optimizations. Our algorithms are asymptotically faster than the current algorithms. We also show that the original algorithms for computing NTSCD and DOD may produce incorrect results. We implemented the new as well as fixed versions of the original algorithms for the computation of NTSCD and DOD. Experimental evaluation shows that our algorithms dramatically outperform the original ones.