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A computer-implemented method analyzes a source code segment which is to be compiled for execution by any one of several different processor types. The method determines whether a performance advantage would be achieved by generating a customized version of object code that can be executed by one of

A computer-implemented method analyzes a source code segment which is to be compiled for execution by any one of several different processor types. The method determines whether a performance advantage would be achieved by generating a customized version of object code that can be executed by one of the processor types compared with generating a non-customized version. If a performance advantage would be achieved, the method generates at least one customized object code version and a non-customized version for the source code segment, and it generates a control section that causes one of the object code versions to be called during execution of the object code in accordance with an executing processor's processor type. If no performance advantage would be achieved, the method generates a non-customized version of the object code that can be executed by any of the different processor types.

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1. A computer-implemented method to be performed by a compiler comprising:analyzing a source code segment which is to be customized to a plurality of different processor types; determining whether generating customized sections of object code for the source code segment to execute on each of the plu

1. A computer-implemented method to be performed by a compiler comprising:analyzing a source code segment which is to be customized to a plurality of different processor types; determining whether generating customized sections of object code for the source code segment to execute on each of the plurality of different processor types, respectively, would provide a performance advantage over generating a non-customized version of object code; and if so, generating object code for the source code segment, including generating a plurality of sections for the source code segment, each of the plurality of sections being object code for the source code segment customized for one of the plurality of different processor types, and generating a control section that causes a selected one of the plurality of sections to be called during execution of the object code in accordance with an executing processor's processor type.