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https://issues.apache.org/jira/browse/SYSTEMML-833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias Boehm resolved SYSTEMML-833.
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Resolution: Fixed
Fix Version/s: SystemML 0.11
> Additional cleanup rewrites
> ---------------------------
>
> Key: SYSTEMML-833
> URL: https://issues.apache.org/jira/browse/SYSTEMML-833
> Project: SystemML
> Issue Type: Bug
> Components: Compiler
> Reporter: Matthias Boehm
> Assignee: Matthias Boehm
> Fix For: SystemML 0.11
>
>
> The rewritten HOP sometimes contains unnecessary as.matrix/as.scalar cast
> pairs, reorg operations with 1x1 dimensions (e.g., transpose, reshape), and
> unnecessary aggregations (e.g., sum over 1x1 matrix). In order to simplify
> debugging (but not performance relevant), we should add a couple of cleanup
> rewrites and extend existing rewrites that remove these unnecessary
> operations.
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