SPIRV-Tools/source/opt/insert_extract_elim.h
Diego Novillo 83228137e1 Re-format source tree - NFC.
Re-formatted the source tree with the command:

$ /usr/bin/clang-format -style=file -i \
    $(find include source tools test utils -name '*.cpp' -or -name '*.h')

This required a fix to source/val/decoration.h.  It was not including
spirv.h, which broke builds when the #include headers were re-ordered by
clang-format.
2017-11-27 14:31:49 -05:00

84 lines
2.9 KiB
C++

// Copyright (c) 2017 The Khronos Group Inc.
// Copyright (c) 2017 Valve Corporation
// Copyright (c) 2017 LunarG Inc.
//
// 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 LIBSPIRV_OPT_INSERT_EXTRACT_ELIM_PASS_H_
#define LIBSPIRV_OPT_INSERT_EXTRACT_ELIM_PASS_H_
#include <algorithm>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include "basic_block.h"
#include "def_use_manager.h"
#include "ir_context.h"
#include "module.h"
#include "pass.h"
namespace spvtools {
namespace opt {
// See optimizer.hpp for documentation.
class InsertExtractElimPass : public Pass {
public:
InsertExtractElimPass();
const char* name() const override { return "eliminate-insert-extract"; }
Status Process(ir::IRContext*) override;
private:
// Return true if indices of extract |extInst| starting at |extOffset|
// match indices of insert |insInst|.
bool ExtInsMatch(const ir::Instruction* extInst,
const ir::Instruction* insInst,
const uint32_t extOffset) const;
// Return true if indices of extract |extInst| starting at |extOffset| and
// indices of insert |insInst| conflict, specifically, if the insert
// changes bits specified by the extract, but changes either more bits
// or less bits than the extract specifies, meaning the exact value being
// inserted cannot be used to replace the extract.
bool ExtInsConflict(const ir::Instruction* extInst,
const ir::Instruction* insInst,
const uint32_t extOffset) const;
// Return true if |typeId| is a vector type
bool IsVectorType(uint32_t typeId);
// Look for OpExtract on sequence of OpInserts in |func|. If there is a
// reaching insert which corresponds to the indices of the extract, replace
// the extract with the value that is inserted. Also resolve extracts from
// CompositeConstruct or ConstantComposite.
bool EliminateInsertExtract(ir::Function* func);
// Initialize extensions whitelist
void InitExtensions();
// Return true if all extensions in this module are allowed by this pass.
bool AllExtensionsSupported() const;
void Initialize(ir::IRContext* c);
Pass::Status ProcessImpl();
// Extensions supported by this pass.
std::unordered_set<std::string> extensions_whitelist_;
};
} // namespace opt
} // namespace spvtools
#endif // LIBSPIRV_OPT_INSERT_EXTRACT_ELIM_PASS_H_