Plugging anti and output dependence removal techniques into loop parallelization algorithm

In this paper we shortly survey some loop transformation techniques which break anti or output dependences, or artificial cycles involving such ‘false’ dependences. These false dependences are removed through the introduction of temporary buffer arrays. Next we show how to plug these techniques into...

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Bibliographic Details
Published in:Parallel computing Vol. 23; no. 1; pp. 251 - 266
Main Authors: Calland, Pierre-Yves, Darte, Alain, Robert, Yves, Vivien, Frédéric
Format: Journal Article
Language:English
Published: Elsevier B.V 1997
Subjects:
Anti dependence
Dependence removal
Loop parallelization algorithm
Output dependence
Loop parallelization algorithm
Anti dependence
Output dependence
Dependence removal
ISSN:0167-8191, 1872-7336
Online Access:Get full text
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Summary:In this paper we shortly survey some loop transformation techniques which break anti or output dependences, or artificial cycles involving such ‘false’ dependences. These false dependences are removed through the introduction of temporary buffer arrays. Next we show how to plug these techniques into loop parallelization algorithms (such as Allen and Kennedy's algorithm). The goal is to extract as many parallel loops as the intrinsic degree of parallelism of the nest authorizes, while avoiding a full memory expansion. We try to reduce the number of temporary arrays that we introduce, as well as their dimension.
Bibliography:SourceType-Scholarly Journals-2
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ObjectType-Conference Paper-1
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ISSN:0167-8191
1872-7336
DOI:10.1016/S0167-8191(96)00108-1