[GitHub] [incubator-tvm] comaniac commented on a change in pull request #6103: [Ansor][AutoTVM v2.0] Phase 1: Access Analyzer

[GitBox <gi...@apache.org>]

comaniac commented on a change in pull request #6103:
URL: https://github.com/apache/incubator-tvm/pull/6103#discussion_r458995260



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File path: include/tvm/auto_scheduler/compute_dag.h
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+/*r
+ * 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/auto_scheduler/compute_dag.h
+ * \brief The auto-scheduler's computational graph and related program analyses.
+ *
+ * We convert a compute declaration described by `tvm.compute` (could be a single operator or a
+ * subgraph) to a ComputeDAG. It keeps the input/output tensors of the compute declaration,
+ * a list of all operations in the DAG as well as static analysis results for the DAG (e.g. the
+ * total float operation count, consumer/producer relations of each operation stage, whether an
+ * operation stage should be tiled/compute inlined ...). These analyses can help the search policy
+ * to make decisions during search process.
+ * ComputeDAG is also responsible for the interaction between TVM Auto-scheduler `LoopState` and
+ * TVM schedule (e.g. applying the `LoopState` transform steps to TVM schedule, providing
+ * `LoopState` with extra information got from TVM schedule ...).
+ */
+
+#ifndef TVM_AUTO_SCHEDULER_COMPUTE_DAG_H_
+#define TVM_AUTO_SCHEDULER_COMPUTE_DAG_H_
+
+#include <tvm/auto_scheduler/loop_state.h>
+#include <tvm/runtime/c_runtime_api.h>
+#include <tvm/te/schedule.h>
+
+#include <unordered_map>
+#include <unordered_set>
+#include <utility>
+#include <vector>
+
+namespace tvm {
+namespace auto_scheduler {
+
+/*! \brief Static analysis result for a ComputeDAG */
+class AccessAnalyzerNode : public Object {

Review comment:
       Agree. Maybe have an `analysis.h` to expect more analyzers in the future. On the other hand, another direction might be renaming AccessAnalyzer to ComputeDAGAnalyzer, because it provides some APIs for the ops in a compute DAG, such as `NeedMultiLevelTiling`, `IsOutput`, etc.




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