mirror of
https://github.com/KhronosGroup/SPIRV-Tools
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eb0c73dad6
* Changed MemPass::InsertPhiInstructions to set basic blocks for new phis * Local SSA elim now maintains instr to block mapping * Added a test and confirmed it fails without the updated phis * IRContext::set_instr_block no longer builds the map if the analysis is invalid * Added instruction to block mapping verification to IRContext::IsConsistent()
77 lines
2.4 KiB
C++
77 lines
2.4 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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ir::IRContext::kAnalysisInstrToBlockMapping;
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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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