hello,gays.
I read the tvm pass code, but i so confuse, the SimplifyInferencePass use the
{MixedModeMutator} to rewrite graph expr{node}, and return a expr.
The {FunctionPassNode::operator()} loop the graph node , do pass for every node
of graph. and restore the id:new_expr to update graph.
this pass{SimplifyInference}, add new nodes to graph and dependents input to
connect to old graph but only return one expr. The {FunctionPassNode} only
update one node to graph. So this Pass{SimplifyInference} maybe not update all
node to IRModule.
Please help me to explain. Did I get it wrong?
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