A special parallel system architecture based on the look-ahead dynamic reconfiguration of inter-processor connections for execution of dedicated programs is discussed in the paper. The architecture assumes connection reconfiguration in multiple crossbar switches. Programs are structured into sections that use temporarily fixed inter-processor connections for communication. While some inter-processor connections in crossbar switches are used for execution of current sections, the connections necessary for execution of further sections are in advance configured some spare connection switches. Automatic program structuring for the assumed system architecture is proposed based on the analysis of parallel program graphs. The structuring algorithm finds the partition into sections that minimizes the execution time of a program executed with the look-ahead created connections. The program execution time is evaluated by simulated program graph execution with reconfiguration control modeled as an extension of the program graph.