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Advanced Vectorization Techniques for Supercomputers

Gotou, S., Tanaka, Y., Iwasawa, K., Kanada, Y., and Aoyama, A., Journal of Information Processing, Vol. 11, No. 1, pp. 22-31, 1987.

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A new FORTRAN 77/HAP compiler for Hitachi's supercomputers S-810 and S-820 has been implemented featuring new compiling techniques to enable users to easily obtain higher performance. The most important element of this compiler is an advanced global data flow analysis method which determines whether vectorization as well as optimization can be applied or not. Also important are powerful program transformation techniques for vectorization and optimization to vectorize more portions of the programs and produce more efficient code. The performance improvement of this new compiler is compared with the performance of the previous compiler. It is also pointed out that these method and techniques can be applicable to other supercomputers as well.

Introduction to this research theme: Programming Language Processing for Vector / Parallel Computers

Keywords: Vectorization, Programming languege processor, Supercomputing, Supercompiler

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