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Posted to issues@systemml.apache.org by "Matthias Boehm (JIRA)" <ji...@apache.org> on 2016/07/31 03:13:20 UTC

[jira] [Created] (SYSTEMML-833) Additional cleanup rewrites

Matthias Boehm created SYSTEMML-833:
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             Summary: 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


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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