mbarrett97 opened a new pull request #4864: [Relay] Ignore Primitive functions in Visitors URL: https://github.com/apache/incubator-tvm/pull/4864 Primitive functions are not to be modified by passes and as such should be ignored. This commit makes Visitor patterns ignore Primitive functions by default, although this can be overridden by setting enter_primitives=true. One case in which this overriding is necessary is in the type_infer pass. This is motivated by the discussions [external-codegen-ensure-fuseops-ignores-partitioned-subgraphs](https://discuss.tvm.ai/t/external-codegen-ensure-fuseops-ignores-partitioned-subgraphs/5507) and [external-codegen-how-to-prevent-batch-norm-from-being-decomposed](https://discuss.tvm.ai/t/external-codegen-how-to-prevent-batch-norm-from-being-decomposed/5449).
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