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[Unity][Pass] BindParams pass, FoldConstant pass (#14016)
This PR introduces FoldConstant/BindParam passes.
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| /* | ||
| * 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. | ||
| */ | ||
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| #include <tvm/driver/driver_api.h> | ||
| #include <tvm/ir/function.h> | ||
| #include <tvm/relax/expr.h> | ||
| #include <tvm/relax/expr_functor.h> | ||
| #include <tvm/relax/transform.h> | ||
| #include <tvm/relax/type.h> | ||
| #include <tvm/tir/op.h> | ||
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| #include <utility> | ||
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| namespace tvm { | ||
| namespace relax { | ||
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| /*! | ||
| * \brief Bind params to function by using name | ||
| * \param func Relax function | ||
| * \param params params dict | ||
| * \return Function | ||
| */ | ||
| inline Function BindParamsByName(Function func, const Map<String, runtime::NDArray>& params) { | ||
| std::unordered_map<std::string, Var> name_dict; | ||
| std::unordered_set<Var, ObjectPtrHash, ObjectPtrEqual> repeat_var; | ||
| for (auto arg : func->params) { | ||
| const auto& name = arg->name_hint(); | ||
| if (name_dict.count(name)) { | ||
| repeat_var.insert(name_dict[name]); | ||
| } else { | ||
| name_dict[name] = arg; | ||
| } | ||
| } | ||
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| std::unordered_map<Var, Expr, ObjectPtrHash, ObjectPtrEqual> bind_dict; | ||
| for (auto& kv : params) { | ||
| if (name_dict.count(kv.first) == 0) { | ||
| continue; | ||
| } | ||
| auto arg = name_dict.at(kv.first); | ||
| if (repeat_var.count(arg)) { | ||
| LOG(FATAL) << "ValueError: Multiple args in the function have name " << kv.first; | ||
| } | ||
| bind_dict[arg] = Constant(kv.second); | ||
| } | ||
| Expr bound_expr = Bind(func, bind_dict); | ||
| Function ret = Downcast<Function>(bound_expr); | ||
| ICHECK(ret.defined()) << "The returning type is expected to be a Relax Function." | ||
| << "\n"; | ||
| return ret; | ||
| } | ||
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| /*! | ||
| * \brief Bind params to a specific function in a module | ||
| * \param m The module | ||
| * \param func_name The name of the specific function | ||
| * \param param The param dict | ||
| * \return The module after binding params. | ||
| */ | ||
| IRModule BindParam(IRModule m, String func_name, Map<String, runtime::NDArray> param) { | ||
| IRModuleNode* new_module = m.CopyOnWrite(); | ||
| Map<GlobalVar, BaseFunc> functions = m->functions; | ||
| for (const auto& func_pr : functions) { | ||
| if (const auto* relax_f = func_pr.second.as<FunctionNode>()) { | ||
| if (relax_f->GetLinkageType() == LinkageType::kExternal) { | ||
| // Use global_symbol if it's external linkage | ||
| Optional<String> gsymbol = relax_f->GetAttr<String>(tvm::attr::kGlobalSymbol); | ||
| if (gsymbol.defined() && gsymbol.value() == func_name) { | ||
| Function f_after_bind = BindParamsByName(GetRef<Function>(relax_f), param); | ||
| new_module->Update(func_pr.first, f_after_bind); | ||
| } | ||
| } else { | ||
| // Use global var's name_hint if it's internal linkage | ||
| if (func_pr.first->name_hint == func_name) { | ||
| Function f_after_bind = BindParamsByName(GetRef<Function>(relax_f), param); | ||
| new_module->Update(func_pr.first, f_after_bind); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| return GetRef<IRModule>(new_module); | ||
| } | ||
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| namespace transform { | ||
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| Pass BindParams(String func_name, Map<String, runtime::NDArray> params) { | ||
| runtime::TypedPackedFunc<IRModule(IRModule, PassContext)> pass_func = | ||
| [=](IRModule mod, PassContext pc) { return BindParam(std::move(mod), func_name, params); }; | ||
| return CreateModulePass(pass_func, 0, "BindParams", {}); | ||
| } | ||
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| TVM_REGISTER_GLOBAL("relax.transform.BindParams").set_body_typed(BindParams); | ||
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| } // namespace transform | ||
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| } // namespace relax | ||
| } // namespace tvm |
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