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// Copyright (c) 2017 Pierre Moreau
//
// 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_REMOVE_DUPLICATES_PASS_H_
#define LIBSPIRV_OPT_REMOVE_DUPLICATES_PASS_H_
#include <unordered_map>
#include "decoration_manager.h"
#include "def_use_manager.h"
#include "ir_context.h"
#include "module.h"
#include "pass.h"
namespace spvtools {
namespace opt {
using IdDecorationsList =
std::unordered_map<uint32_t, std::vector<ir::Instruction*>>;
// See optimizer.hpp for documentation.
class RemoveDuplicatesPass : public Pass {
public:
const char* name() const override { return "remove-duplicates"; }
Status Process(ir::IRContext*) override;
// TODO(pierremoreau): Move this function somewhere else (e.g. pass.h or
// within the type manager)
// Returns whether two types are equal, and have the same decorations.
static bool AreTypesEqual(const ir::Instruction& inst1,
const ir::Instruction& inst2,
ir::IRContext* context);
private:
// Remove duplicate capabilities from the module attached to |ir_context|.
//
// Returns true if the module was modified, false otherwise.
bool RemoveDuplicateCapabilities(ir::IRContext* ir_context) const;
// Remove duplicate extended instruction imports from the module attached to
// |ir_context|.
//
// Returns true if the module was modified, false otherwise.
bool RemoveDuplicatesExtInstImports(ir::IRContext* ir_context) const;
// Remove duplicate types from the module attached to |ir_context|.
//
// Returns true if the module was modified, false otherwise.
bool RemoveDuplicateTypes(ir::IRContext* ir_context) const;
// Remove duplicate decorations from the module attached to |ir_context|.
//
// Returns true if the module was modified, false otherwise.
bool RemoveDuplicateDecorations(ir::IRContext* ir_context) const;
};
} // namespace opt
} // namespace spvtools
#endif // LIBSPIRV_OPT_REMOVE_DUPLICATES_PASS_H_
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