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https://github.com/KhronosGroup/SPIRV-Tools
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340370eddb
Remove extension whitelists from transforms that are essentially combinatorial (and avoiding pointers) or which affect only control flow. It's very very unlikely an extension will add a new control flow construct. Remove from: - dead branch elimination - dead insertion elimination - insert extract elimination - block merge Fixes https://github.com/KhronosGroup/SPIRV-Tools/issues/1392
62 lines
2.0 KiB
C++
62 lines
2.0 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_INSERT_EXTRACT_ELIM_PASS_H_
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#define LIBSPIRV_OPT_INSERT_EXTRACT_ELIM_PASS_H_
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#include <algorithm>
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#include <map>
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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 "ir_context.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 InsertExtractElimPass : public MemPass {
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public:
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InsertExtractElimPass();
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const char* name() const override { return "eliminate-insert-extract"; }
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Status Process(ir::IRContext*) override;
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private:
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// Return id of component of |cinst| specified by |extIndices| starting with
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// index at |extOffset|. Return 0 if indices cannot be matched exactly.
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uint32_t DoExtract(ir::Instruction* cinst, std::vector<uint32_t>* extIndices,
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uint32_t extOffset);
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// Look for OpExtract on sequence of OpInserts in |func|. If there is a
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// reaching insert which corresponds to the indices of the extract, replace
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// the extract with the value that is inserted. Also resolve extracts from
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// CompositeConstruct or ConstantComposite.
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bool EliminateInsertExtract(ir::Function* func);
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void Initialize(ir::IRContext* c);
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Pass::Status ProcessImpl();
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};
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} // namespace opt
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} // namespace spvtools
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#endif // LIBSPIRV_OPT_INSERT_EXTRACT_ELIM_PASS_H_
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