Skeleton driven transformations for an OpenMP compiler

In this paper we present a technique based on code templates, oriented to source to source code transformations for OpenMP parallelization. Our goal is to provide an OpenMP compilation infrastructure that includes a reconfigurable code generation phase, targetting different OpenMP runtime systems or explore different translation strategies for OpenMP constructs. We describe the main OpenMP transformations needed in any OpenMP compiler as well as the characteristics in the code generation phase dependant on the target runtime system. Our implementation has been done in the Open64 compiler infrastructure. We have added a new compiler phase, which takes a file containing WHIRL intermediate representation generated from source code, and applies transformations at specific points, indicated by OpenMP directives. Each OpenMP directive has a source code template associated.