An Overview of the Fortran D Programming System Seema

The success of large-scale parallel architectures is limited by the diiculty of developing machine-independent parallel programs. We have developed Fortran D, a version of Fortran extended with data decomposition speciications, to provide a portable data-parallel programming model. This paper presents the design of two key components of the Fortran D programming system: a prototype compiler and an environment to assist automatic data decomposition. The Fortran D compiler addresses program partitioning, communication generation and optimization, data decomposition analysis, run-time support for unstructured computations, and storage management. The For-tran D programming environment provides a static performance estimator and an automatic data par-titioner. We believe that the Fortran D programming system will signiicantly ease the task of writing machine-independent data-parallel programs.