Commit 2131c346 authored by Sanjoy Das's avatar Sanjoy Das Committed by TensorFlower Gardener
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Introduce an _XlaCompileTimeConstantInputs attribute. 

_XlaCompileTimeConstantInputs overrides CompileTimeConstantInput -- if
_XlaCompileTimeConstantInputs is present on a node then its value is used as the
definitive "must be compile time constant" input list.

This functionality will be used in a future CL to rewrite TF Slice operations
into Slice operations that only need require their "size" input to be constant.

PiperOrigin-RevId: 218264828
parent b42b91fb
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