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-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed 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.
- */
-
-#ifndef ART_COMPILER_DEX_PASS_H_
-#define ART_COMPILER_DEX_PASS_H_
-
-#include <string>
-
-#include "base/logging.h"
-
-namespace art {
-
-// Forward declarations.
-class BasicBlock;
-class Pass;
-
-// Empty Pass Data Class, can be extended by any pass extending the base Pass class.
-class PassDataHolder {
-};
-
-/**
- * @class Pass
- * @brief Base Pass class, can be extended to perform a more defined way of doing the work call.
- */
-class Pass {
- public:
- explicit Pass(const char* name)
- : pass_name_(name) {
- }
-
- virtual ~Pass() {
- }
-
- virtual const char* GetName() const {
- return pass_name_;
- }
-
- /**
- * @brief Gate for the pass: determines whether to execute the pass or not considering a CompilationUnit
- * @param data the PassDataHolder.
- * @return whether or not to execute the pass.
- */
- virtual bool Gate(const PassDataHolder* data ATTRIBUTE_UNUSED) const {
- // Base class says yes.
- return true;
- }
-
- /**
- * @brief Start of the pass: called before the Worker function.
- */
- virtual void Start(PassDataHolder* data ATTRIBUTE_UNUSED) const {
- }
-
- /**
- * @brief End of the pass: called after the WalkBasicBlocks function.
- */
- virtual void End(PassDataHolder* data ATTRIBUTE_UNUSED) const {
- }
-
- /**
- * @param data the object containing data necessary for the pass.
- * @return whether or not there is a change when walking the BasicBlock
- */
- virtual bool Worker(PassDataHolder* data ATTRIBUTE_UNUSED) const {
- // Passes that do all their work in Start() or End() should not allow useless node iteration.
- LOG(FATAL) << "Unsupported default Worker() used for " << GetName();
- UNREACHABLE();
- }
-
- protected:
- /** @brief The pass name: used for searching for a pass when running a particular pass or debugging. */
- const char* const pass_name_;
-
- private:
- // In order to make the all passes not copy-friendly.
- DISALLOW_COPY_AND_ASSIGN(Pass);
-};
-} // namespace art
-#endif // ART_COMPILER_DEX_PASS_H_