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https://github.com/KhronosGroup/SPIRV-Tools
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efe12ff5a1
Originally the passes that extended from MemPass were those that are of the def-use manager. I am assuming they would be able to preserve it because of that. Added a check to verify consistency of the IRContext. The IRContext relies on the pass to tell it if something is invalidated. It is possible that the pass lied. To help identify those situations, we will check if the valid analyses are correct after each pass. This will be enabled by default for the debug build, and disabled in the production build. It can be disabled in the debug build by adding "-DSPIRV_CHECK_CONTEXT=OFF" to the cmake command.
76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
// Copyright (c) 2017 The Khronos Group Inc.
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// Copyright (c) 2017 Valve Corporation
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// Copyright (c) 2017 LunarG 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_LOCAL_SSA_ELIM_PASS_H_
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#define LIBSPIRV_OPT_LOCAL_SSA_ELIM_PASS_H_
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#include <algorithm>
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#include <map>
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#include <queue>
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#include <unordered_map>
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#include <unordered_set>
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#include <utility>
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#include "basic_block.h"
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#include "def_use_manager.h"
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#include "mem_pass.h"
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#include "module.h"
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namespace spvtools {
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namespace opt {
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// See optimizer.hpp for documentation.
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class LocalMultiStoreElimPass : public MemPass {
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using cbb_ptr = const ir::BasicBlock*;
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public:
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using GetBlocksFunction =
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std::function<std::vector<ir::BasicBlock*>*(const ir::BasicBlock*)>;
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LocalMultiStoreElimPass();
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const char* name() const override { return "eliminate-local-multi-store"; }
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Status Process(ir::IRContext* c) override;
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ir::IRContext::Analysis GetPreservedAnalyses() override {
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return ir::IRContext::kAnalysisDefUse;
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}
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private:
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// Initialize extensions whitelist
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void InitExtensions();
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// Return true if all extensions in this module are allowed by this pass.
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bool AllExtensionsSupported() const;
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// Remove remaining loads and stores of function scope variables only
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// referenced with non-access-chain loads and stores from function |func|.
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// Insert Phi functions where necessary. Running LocalAccessChainRemoval,
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// SingleBlockLocalElim and SingleStoreLocalElim beforehand will improve
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// the runtime and effectiveness of this function.
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bool EliminateMultiStoreLocal(ir::Function* func);
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void Initialize(ir::IRContext* c);
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Pass::Status ProcessImpl();
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// Extensions supported by this pass.
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std::unordered_set<std::string> extensions_whitelist_;
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};
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} // namespace opt
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} // namespace spvtools
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#endif // LIBSPIRV_OPT_LOCAL_SSA_ELIM_PASS_H_
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