Commit 5d1de245 authored by Mark Heffernan's avatar Mark Heffernan Committed by TensorFlower Gardener
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Preserve unique ids when serializing/deserializing HLO protos. 

Re-assigning unique IDs broke serialization of HloSchedule, and keeping IDs stable improves the fidelity of the proto serialization. This change requires that instructions in HLO module protos have valid, module-scope-unique ids so change the XLA builder to hand out module-scope-unique ids. Previously, instruction ids were only unique in the computation scope.

PiperOrigin-RevId: 212692339
parent 3fb47471
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