exec_builder.h

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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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#ifndef TVM_RELAX_EXEC_BUILDER_H_
#define TVM_RELAX_EXEC_BUILDER_H_
 
#include <tvm/ir/expr.h>
#include <tvm/node/reflection.h>
#include <tvm/node/repr_printer.h>
#include <tvm/runtime/object.h>
#include <tvm/runtime/registry.h>
#include <tvm/runtime/relax_vm/bytecode.h>
#include <tvm/runtime/relax_vm/executable.h>
 
#include <string>
#include <unordered_map>
#include <vector>
 
namespace tvm {
namespace relax {
 
namespace vm = tvm::runtime::relax_vm;
 
class ExecBuilder;
 
class ExecBuilderNode : public Object {
 public:
  void DeclareFunction(const std::string& func, vm::VMFuncInfo::FuncKind kind);
  void EmitFunction(const std::string& func, int64_t num_inputs,
                    Optional<Array<String>> param_names,
                    vm::VMFuncInfo::FuncKind kind = vm::VMFuncInfo::FuncKind::kVMFunc,
                    int64_t init_register_size = 0);
  void EndFunction(const std::string& func);
  void EmitCall(const std::string& func, std::vector<vm::Instruction::Arg> args, vm::RegName ret);
  void EmitCall(vm::Instruction::Arg func, std::vector<vm::Instruction::Arg> args, vm::RegName ret);
  void EmitRet(vm::Instruction::Arg result);
  void EmitGoto(vm::Index pc_offset);
  void EmitIf(vm::Instruction::Arg cond, vm::Index false_offset);
  vm::Instruction::Arg GetFunction(const std::string& name);
  template <typename T>
  vm::Instruction::Arg ConvertConstant(T value) {
    TVMRetValue rv;
    rv = value;
    return ConvertConstant_(rv);
  }
  vm::Executable* exec() const;
  ObjectPtr<vm::Executable> Get();
  TVM_DLL static ExecBuilder Create();
 
  void VisitAttrs(AttrVisitor* v) {}
 
  static constexpr const uint32_t _type_index = TypeIndex::kDynamic;
  static constexpr const char* _type_key = "relax.ExecBuilder";
  TVM_DECLARE_FINAL_OBJECT_INFO(ExecBuilderNode, Object);
 
 private:
  vm::Instruction::Arg ConvertConstant_(TVMRetValue obj);
 
  void CheckExecutable();
  void Formalize();
 
  ObjectPtr<vm::Executable> exec_;  // mutable
  std::unordered_map<ObjectRef, vm::Index, StructuralHash, StructuralEqual> const_dedup_map_;
};
 
class ExecBuilder : public ObjectRef {
 public:
  TVM_DEFINE_MUTABLE_OBJECT_REF_METHODS(ExecBuilder, ObjectRef, ExecBuilderNode);
};
 
}  // namespace relax
}  // namespace tvm
 
#endif  // TVM_RELAX_EXEC_BUILDER_H_