Digital Equipment Corporation

Bevin R Brett

Ronald F Brender

A method and system for compiling a source program using smart recompilation. The invention allows fragments to contain 'invocation specific' information, which is generated during a code generation phase of compilation. A hint generator attempts to preserve values of the invocation specific information between successive invocations of the compiler.

Using sorting to do matchup in smart recompilation

Using hint generation to cause portions of object files to remain the

Hint generation in smart recompilation

Smart recompilation of performing matchup/difference after code

A compiler maintains a library of sharable program structures generated in response to instantiations of a generic program structure, along with characteristics of parameters which were used in generating the sharable program structure. In response to an instantiation of a generic program structure, the compiler generates information relating to the characteristics and usage of each parameter which are used in connection with the instantiation. The compiler then compares that information to the corresponding information associated with the sharable program structures in the library. If the library contains a sharable program structure whose parameter information compares satisfactorily, that sharable program structure is used in connection with further operations in connection with the instantiation. On the other hand, if the library does not contain such a sharable program structure, one is generated and stored in the library, along with the characteristics of the parameters used in its generation, for use in sharing with later instantiations. In addition, the just-generated sharable program structure is used in further operations in connection with the instantiation.

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Merrimack, NH, United States of America

Bevin R Brett