The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 05, 1995
Filed:
Mar. 17, 1992
Michael G Burke, Yonkers, NY (US);
Jong-Deok Choi, Mount Kisco, NY (US);
Ronald G Cytron, University City, MO (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
The present invention provides a system and method for optimizing or parallelizing computer code typically represented by a source program. The source program is represented by a control flow graph. The present invention includes an optimizer for constructing a compact data flow representation from the control flow graph and a mechanism for evaluating the compact data flow representation in relation to a data flow framework in order to determine a solution to a particular data flow problem. The present invention represents data flow chains compactly, obtaining some of the advantages of Static Single Assignment (SSA) form without modification of program text (i.e., renaming). In addition, the present invention represents compactly certain data flow chains which SSA form fails to represent (i.e. def-def, use-def, and use-use chains). The data flow representation of the present invention combines information only once in the graph, information is forwarded directly to where it is needed, and useless information is not represented.