International Business Machines Corporation

Jin-Fan Shaw

Alan Hersh Karp

Alfred William Shannon

Randolph G Scarborough

John Luen Ng

Michael Lai

Leslie J Toomey

A subscript table mapping system for optimizing the compilation of certain Fortran 90 array construction and array manipulation transformation functions. The subscript table data object of this invention is used to perform the three compiler optimizations, including subscript dependency analysis, subscript table transformation and optimized code generation. Application of a simple subscript mapping function tailored to the particular intrinsic Fortran 90 array variable transformation function permits compilation of executable binary code that saves substantial processing steps and data storage space by avoiding during execution the usual requirement for temporary storage of abstract transformational array variables.

Array variable transformation system employing subscript table mapping

A method performed within a multi-processing, multi-programming computer environment for reducing conflict among tasks concurrently accessing COMMON BLOCKs in code sequences compiled within said environment from a FORTRAN like language system, and for reducing the memory used in the storing of private copies of said COMMON BLOCKs. The method involves inserting constructs at compile time into the compiled code which enable the COMMON BLOCKs to be dynamically bound at runtime to two or more referencing tasks. Then, at execution time responsive to the constructs, the blocks are bound to the tasks dynamically and scoped so that they lie within the dynamic nesting of the tasks.

System for inserting constructs into compiled code, defining scoping of

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San Jose, CA, United States of America

Jin-Fan Shaw