DFG Passes

`-dfg-channel-fanout-expansion`

`-dfg-collapse-unit-dims`

Collapse statically size-1 axes out of dfg.process channel port shapes.

`-dfg-inline-embed-region`

Inline embedded region at place.

`-dfg-io-normalization`

Normalize IO shape and pull/push operations.

`-dfg-operator-to-process`

Convert each operator to process