International Business Machines Corporation

Scott Thomas Robinson

William Jon Schmidt

Robert Ralph Roediger

Robert John Donovan

Colin R DeVilbiss

James Albert Kryka

Joseph Patrick Reynolds

Roger Wayne Southwick

Paul Lu Verne Godtland

Sherri Lynn McMeeking

Systems and methods to reduce table lookups and network traffic are provided. A bridging device may receive a unicast frame to be bridged. The unicast frame may be transmitted to at least one network of a plurality of networks. The bridging device may determine if the unicast frame was successfully delivered to the at least one network.

Confirmed delivery of bridged unicast frames

A program feature set is compared to a processor feature set. The comparison may be performed in response to restoring the program onto a system or requesting its execution. The processor feature set represents zero, one or more optional hardware features supported by the processor, whereas the program feature set represents zero, one or more optional hardware features the program relies upon in its generated code. Comparison of the feature sets determines whether a particular program may run on a particular processor. Programs may be automatically or manually rebuilt to achieve full compatibility. If the comparison indicates that the program requires a feature not supported by the processor, the program is rebuilt based on the processor feature set. Alternatively, the program may be rebuilt in response to a rebuild request, rather than the comparison. The program is preferably rebuilt from an intermediate representation (IR) stored with or locatable from the program.

Adaptively generating code for a computer program

A compiler for object-oriented programming code in a language which employs run-time static initialization semantics analyzes the static initialization code to find a subset of initialization statements which must execute under all conditions, creates an pre-initialized image of the static storage using the subset, and removes statements which were pre-initialized from the final compiled code. Preferably, the compiler is a back-end compiler for the Java language, which converts Java bytecode into machine executable instructions. A static initializer method for each class is decomposed to construct a control flow graph for the method, which is then analyzed to identify statements in the source which must necessarily execute whenever the initialization method is called. The compile-time static storage image is pre-initialized to zero, except where affected by these identified statements, which are set at compile time as if the identified statements had executed. The identified statements are then removed from the code being compiled. Code size is thus reduced at the same time that performance at run time is improved as a result of not having to execute the removed initialization statements.

Object oriented method and apparatus for class variable initialization

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Rochester, MN, United States of America

Scott Thomas Robinson