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https://gitee.com/openharmony/third_party_spirv-tools
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102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
// Copyright (c) 2016 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef LIBSPIRV_OPT_PASS_MANAGER_H_
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#define LIBSPIRV_OPT_PASS_MANAGER_H_
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#include <memory>
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#include <vector>
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#include "log.h"
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#include "module.h"
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#include "pass.h"
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#include "spirv-tools/libspirv.hpp"
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namespace spvtools {
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namespace opt {
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// The pass manager, responsible for tracking and running passes.
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// Clients should first call AddPass() to add passes and then call Run()
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// to run on a module. Passes are executed in the exact order of addition.
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class PassManager {
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public:
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// Constructs a pass manager.
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//
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// The constructed instance will have an empty message consumer, which just
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// ignores all messages from the library. Use SetMessageConsumer() to supply
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// one if messages are of concern.
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PassManager() : consumer_(nullptr) {}
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// Sets the message consumer to the given |consumer|.
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void SetMessageConsumer(MessageConsumer c) { consumer_ = std::move(c); }
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// Adds an externally constructed pass.
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void AddPass(std::unique_ptr<Pass> pass);
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// Uses the argument |args| to construct a pass instance of type |T|, and adds
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// the pass instance to this pass manger. The pass added will use this pass
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// manager's message consumer.
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template <typename T, typename... Args>
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void AddPass(Args&&... args);
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// Returns the number of passes added.
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uint32_t NumPasses() const;
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// Returns a pointer to the |index|th pass added.
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inline Pass* GetPass(uint32_t index) const;
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// Returns the message consumer.
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inline const MessageConsumer& consumer() const;
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// Runs all passes on the given |module|. Returns Status::Failure if errors
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// occur when processing using one of the registered passes. All passes
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// registered after the error-reporting pass will be skipped. Returns the
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// corresponding Status::Success if processing is succesful to indicate
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// whether changes are made to the module.
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Pass::Status Run(ir::Module* module);
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private:
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// Consumer for messages.
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MessageConsumer consumer_;
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// A vector of passes. Order matters.
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std::vector<std::unique_ptr<Pass>> passes_;
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};
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inline void PassManager::AddPass(std::unique_ptr<Pass> pass) {
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passes_.push_back(std::move(pass));
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}
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template <typename T, typename... Args>
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inline void PassManager::AddPass(Args&&... args) {
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passes_.emplace_back(new T(std::forward<Args>(args)...));
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passes_.back()->SetMessageConsumer(consumer_);
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}
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inline uint32_t PassManager::NumPasses() const {
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return static_cast<uint32_t>(passes_.size());
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}
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inline Pass* PassManager::GetPass(uint32_t index) const {
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SPIRV_ASSERT(consumer_, index < passes_.size(), "index out of bound");
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return passes_[index].get();
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}
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inline const MessageConsumer& PassManager::consumer() const {
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return consumer_;
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}
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} // namespace opt
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} // namespace spvtools
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#endif // LIBSPIRV_OPT_PASS_MANAGER_H_
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