Split-C is a single program, multiple data (SPMD) programming language. Split-C provides the ability to use a shared address space abstraction on a distributed shared memory (DSM) system, such as a network of workstations (NOW). The existing Split-C compiler translates all references to shared variables owned by another processor into network transactions. We implement SWCC-Split-C, a modified Split-C compiler which automatically caches remote accesses to avoid redundant network transactions. Our cache coherence system is implemented entirely in software. It uses a directory system and a simple MSI coherence protocol to provide cache coherence with blocks of fine granularity. We demonstrate significant improvements for programs with redundant remote memory accesses, and programs with spatial locality in remote accesses. Our SWCC-Split-C compiler is ideally suited to irregular applications with access patterns which are difficult to predict.