mbaret commented on code in PR #12550: URL: https://github.com/apache/tvm/pull/12550#discussion_r954062852
########## src/relay/backend/aot/aot_lower_main.cc: ########## @@ -0,0 +1,869 @@ +/* + * 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 src/relay/backend/aot/aot_lower_main.cc + * \brief Lower the Relay main func into an AOT TIR main func. + */ +#include "./aot_lower_main.h" + +#include <tvm/tir/builtin.h> +#include <tvm/tir/transform.h> + +#include "../../op/call/call.h" +#include "../../op/memory/device_copy.h" +#include "../../op/memory/memory.h" +#include "../../transforms/device_aware_visitors.h" +#include "../name_transforms.h" +#include "../utils.h" + +namespace tvm { +namespace relay { +namespace backend { +namespace executor { +namespace aot { + +using StorageMap = + std::unordered_map<Expr, StorageInfo, runtime::ObjectPtrHash, runtime::ObjectPtrEqual>; + +/*! + * \brief Assigns one or more StorageInfos to expressions requiring storage in a + * function to produce an Expr to StorageInfo map. + * + * This pass is leveraged by AOTMainLowerer to perform an initial naive allocation + * for tensors in the Relay main function. The resulting storage map is then lowered + * into TIR allocations by AOTMainLowerer where the allocation can be subsequently + * optimized by later passes (e.g. USMP). + */ +class ExprAllocator : public transform::DeviceAwareExprVisitor { Review Comment: I think in this case I'd rather consider it an implementation detail rather than a side-channel - that is to say we're not channeling any information alongside a pass, it gets consumed immediately as part of AOTMainLowerer. -- 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. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
