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Posted to issues@systemml.apache.org by "Dylan Hutchison (JIRA)" <ji...@apache.org> on 2017/06/20 06:17:00 UTC
[jira] [Assigned] (SYSTEMML-1663) New simplification rewrite for
binary multiplication chains
[ https://issues.apache.org/jira/browse/SYSTEMML-1663?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dylan Hutchison reassigned SYSTEMML-1663:
-----------------------------------------
Assignee: Dylan Hutchison
> New simplification rewrite for binary multiplication chains
> -----------------------------------------------------------
>
> Key: SYSTEMML-1663
> URL: https://issues.apache.org/jira/browse/SYSTEMML-1663
> Project: SystemML
> Issue Type: Sub-task
> Components: Compiler
> Reporter: Matthias Boehm
> Assignee: Dylan Hutchison
> Labels: beginner
> Fix For: SystemML 1.0
>
>
> There are various scripts that use chains of binary element-wise multiplications such as {{A * B * B}} or {{B * A * B}}, which are currently compiled to {{(A * B) * B}} and {{(B * A) * B}}, respectively. We should explicitly reason about and simply this to expose the unary operation {{B^2}} which can be evaluated much more efficiently, in case of both singlenode and distributed operations.
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