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:
Dec. 24, 2013
Filed:
Oct. 13, 2010
Patrick R. Doyle, Toronto, CA;
Allan H. Kielstra, Ajax, CA;
Pramod Ramarao, Toronto, CA;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A computer-implemented process for deductive reaching definition analysis receives a control flow graph to form a set of received blocks and edges, performs traditional reaching definitions to produce bit-vectors OUT(b), GEN(b) and KILL(b) for each block in the set of received blocks and receives impossibility indicators for a set of definitions that are impossible on specific edges. The computer-implemented process further performs deduction operations using a combination of the bit-vectors and impossibility indicators to deduce that additional definitions cannot reach certain blocks to create resulting reachability information and provides the resulting reachability information as a result to a requestor. A related system and program product is also provided.