11.7. Specific Options for Fortran and COBOL
11.7.1. Fortran Optimizing Preprocessor
A special Fortran preprocessor performs source code optimization and vectorization. You use the +OP and -WP options to invoke ftnopp to preprocess the source code. The preprocessor is currently supported only for Fortran and must be invoked at initial compile time. It makes actual changes to the source code, including many special optimizer directives to control optimization. Changes also include the vectorization of DO loops by invoking vector libraries, and the substitution of procedure inlining and loop unrolling.
Performance of Fortran applications can be significantly improved by using the optimizing preprocessor.
11.7.2. Special COBOL Considerations
There ...
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