David Allen Lambert

US Patent:

6631518, Oct 7, 2003

Filed:

Mar 19, 1997

Appl. No.:

08/820736

Inventors:

Vita Bortnikov - Haifa, IL
David John Lambert - Rochester MN
Bilha Mendelson - Haifa, IL
Robert Ralph Roediger - Rochester MN
William Jon Schmidt - Rochester MN
Inbal Shavit-Lottem - Kibbutz Bet-Oren, IL

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 945

US Classification:

717158

Abstract:

Disclosed is a system and method for a profiling system wherein profile data is stored in a separable hierarchical fashion such that profile data for each compiled procedure in a computer program can be readily identified and utilized. In particular, each source module has a corresponding profile data file and each procedure has a corresponding procedure profile area. The system and method also includes a mechanism for verifying the existence and validity of profile information, and a mechanism for handling invalid profile information.

US Patent:

60901551, Jul 18, 2000

Filed:

Jun 5, 1995

Appl. No.:

8/461943

Inventors:

Robert John Donovan - Rochester MN
Daniel Rodman Hicks - Byron MN
James Albert Kryka - Rochester MN
David John Lambert - Rochester MN
Robert Ralph Roediger - Rochester MN

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 945

US Classification:

717 9

Abstract:

Apparatus and a method are provided for defining visibility boundaries in compiled code of an optimizing compiler used with a digital computer for converting a source program to an object code. The source program is received and a first intermediate representation of the source program is generated. A pseudo operation representing a predetermined event is inserted in the first intermediate representation. Sequential operations of the first intermediate representation including the inserted pseudo operations are processed for defining an internal data structure of the source program. A visibility boundary for a selected variable is identified responsive to identifying a pseudo operation in the first intermediate representation.