Commit 6d3bb6ca authored by A. Unique TensorFlower's avatar A. Unique TensorFlower Committed by TensorFlower Gardener
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Don't remove identity nodes if they follow a device crossing and have... 

Don't remove identity nodes if they follow a device crossing and have consumers on a device different than themselves. They may be used to cache or route data between devices in a deliberate manner.

Simplify code in DependencyOptimizer a bit.

PiperOrigin-RevId: 188730185
parent e1066ba1
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