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:
Jan. 20, 1998
Filed:
Jun. 14, 1995
Arch D Robison, Champaign, IL (US);
Kuck & Associates, Inc., Champaign, IL (US);
Abstract
A method for analyzing and optimizing programs that define and use aggregate data structures. A program to be analyzed and optimized is inspected to find definitions and uses of lvalues, which are regions of memory. The lvalues may be denoted by program variables, pointer expressions, or components of aggregate lvalues. A data-flow solver determines where definitions of lvalues reach uses. A set of 'least general unifiers' are computed for the definitions and uses. A replacement variable is created for each least general unifier that is determined to be replaceable. Each reference to an lvalue that corresponds to a replaceable least general unifier is replaced by a reference to the corresponding replacement variable or a component thereof. The method is applicable even in the presence of potential aliasing.