icemelon9 commented on a change in pull request #4886: [RELAY] Non-recursive
Graph Vistor and Rewriter
URL: https://github.com/apache/incubator-tvm/pull/4886#discussion_r403135767
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File path: include/tvm/relay/expr_functor.h
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@@ -232,6 +232,188 @@ class ExprMutator
std::unordered_map<Expr, Expr, ObjectHash, ObjectEqual> memo_;
};
+/*!
+ * \brief A wrapper around ExprVisitor which traverses the Dataflow Normal AST.
+ *
+ * MixedModeVisitor treats Expr as dataflow graph, and visits in post-DFS order
+ *
+ * MixedModeVisitor provides the same recursive API as ExprVisitor, and uses
+ * recursion to traverse most forms of the IR, but under the hood it expands
nested dataflow regions
+ * of the graph and processes them iteratatively to prevent stack overflows
+ */
+class MixedModeVisitor : public ::tvm::relay::ExprVisitor {
+ public:
+ /*! \brief The constructor of MixedModeVisitor
+ * \param visit_limit The number of times to allow visitation to a note.
Usually 1, ocassionally
Review comment:
note -> node?
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