Using Disjoint Reachability for Parallelization

We present a disjoint reachability analysis for Java. Our analysis computes extended points-to graphs annotated with reachability states. Each heap node is annotated with a set of reachability states that abstract the reachability of objects represented by the node. The analysis also includes a global pruning step which analyzes a reachability graph to prune imprecise reachability states that cannot be removed with local reasoning alone. We have implemented the analysis and used it to parallelize 9 benchmarks. Our evaluation shows the analysis results are sufficiently precise to parallelize our benchmarks and achieve an average speedup of 16.9×.