Fix handling of constant inputs to SubsumingElemwise
#93
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This fixes the error seen in #90.
The underlying issue is that
SubsumingElemwise
extendsOpFromGraph
and the latter does not accept constant inputs (e.g. anOpFromGraph
representing1 / x
should only takex
as an input, and not also1
). This PR removes constant inputs when theOpFromGraph
is constructed and also strips them from calls toSubsumingElemwise.make_node
. The assumption is that the inputs provided in both cases (i.e. when theOp
is constructed and when the constructedOp
is used to create a node) refer to the same constants, which they absolutely should in this scenario.