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On the removal of anti- and output-dependences

Abstract : In this paper we build upon results of Padua and Wolfe, who introduced two graph transformations to break dependence paths including anti- and output-dependences. We first formalize these two transformations. Then, given a loop nest, we aim at determining which statements should be transformed so as to break artificial dependence paths involving anti- or output-dependences. The problem of finding the minimum number of statements to be transformed is shown to be NP-complete, and we propose two efficient heuristics.
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Pierre-Yves Calland, Alain Darte, Yves Robert, Frédéric Vivien. On the removal of anti- and output-dependences. International Journal of Parallel Programming, Springer Verlag, 1998, 26 (3), pp.285-312. ⟨10.1023/A:1018790129478⟩. ⟨hal-00856847⟩



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