masahi commented on a change in pull request #5231: URL: https://github.com/apache/incubator-tvm/pull/5231#discussion_r425440445
########## File path: include/tvm/relay/dataflow_matcher.h ########## @@ -0,0 +1,67 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +/*! + * \file tvm/relay/dataflow_matcher.h + * \brief A pattern matcher for matching dataflow properties. + */ +#ifndef TVM_RELAY_DATAFLOW_MATCHER_H_ +#define TVM_RELAY_DATAFLOW_MATCHER_H_ + +#include <tvm/relay/dataflow_pattern.h> +#include <tvm/relay/dataflow_pattern_functor.h> + +#include <unordered_map> +#include <utility> + +namespace tvm { +namespace relay { + +class DFPatternCallback; +/*! + * \brief Base type of all dataflow pattern callbacks. + * \sa DFPatternCallback + */ +class DFPatternCallbackNode : public Object { + public: + /*! \brief Pattern this callback matches */ + DFPattern pattern_; + /*! \brief Function to call when finding a matched expression */ + PackedFunc function_; + + void VisitAttrs(tvm::AttrVisitor* v) {} + + static constexpr const char* _type_key = "DFPatternCallbackNode"; + TVM_DECLARE_BASE_OBJECT_INFO(DFPatternCallbackNode, Object); +}; + +/*! + * \brief Managed reference to dataflow pattern callbacks. + * \sa DFPatternCallbackNode + */ +class DFPatternCallback : public ObjectRef { Review comment: I can see these pass functions can be useful for op fusion and BYOC related passes. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
