[jira] [Created] (SYSTEMML-1663) New simplification rewrite for binary multiplication chains

["Matthias Boehm (JIRA)" <ji...@apache.org>]

Matthias Boehm created SYSTEMML-1663:
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             Summary: 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
            Reporter: Matthias Boehm


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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