ashutosh-arm commented on code in PR #12215: URL: https://github.com/apache/tvm/pull/12215#discussion_r937512595
########## src/relay/transforms/remove_standalone_reshapes.cc: ########## @@ -0,0 +1,120 @@ +/* + * 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/transforms/remove_standalone_reshapes.cc + * \brief This file contains the Relay pass for removing unfused reshapes from lowered graph. + */ + +#include <tvm/relay/expr_functor.h> +#include <tvm/relay/transform.h> + +#include "../op/call/call.h" +#include "../op/memory/on_device.h" + +namespace tvm { +namespace relay { + +TVM_REGISTER_PASS_CONFIG_OPTION("relay.RemoveStandaloneReshapes.enable", Bool); +/*! Removes reshapes right after LowerTE. Removes preceding on_device calls + * while removing reshapes. + */ +class RemoveStandaloneReshapesMutator : public MixedModeMutator { + public: + explicit RemoveStandaloneReshapesMutator(IRModule& mod) : ir_module_(mod) {} + + using MixedModeMutator::VisitExpr_; + + /*! * \brief Generated map of let variables to preceding CallLowered */ + Expr VisitExpr_(const LetNode* let) final { + Let ret_let; + Var var = Downcast<Var>(this->Mutate(let->var)); + auto value = this->Mutate(let->value); + if (auto* on_device_call = value.as<CallNode>()) { + OnDeviceProps on_device_props = GetOnDeviceProps(on_device_call); + if (on_device_props.body.defined() && on_device_props.body->IsInstance<CallNode>()) { + const Call call_lowered = Downcast<Call>(on_device_props.body); + if (call_lowered.defined() && call_lowered->op.same_as(CallLoweredOp())) { + let_var_to_call_lowered_.Set(var, call_lowered); + } + } + } + auto body = this->Mutate(let->body); + return WithFields(GetRef<Let>(let), var, value, body); + } + + /*! * \brief Returns preceding CallLowered when call is a CallLowered(Reshape) */ Review Comment: Graph contains let nodes in between the call_lowered(). I've included the following piece as part of the Rewrite_() as well. ``` /* %1 = call_lowered(@tvmgen_default_non_reshape_function, %input, ...); let %x: = on_device(%1, ...); %2 = (%x,); %3 = call_lowered(@tvmgen_default_fused_reshape, %2, ..., "relay_attrs"=__dict__="relay.reshape_only"=1, ...); */ ``` -- 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]
