SPIRV-Tools/source/fuzz/fact_manager/irrelevant_value_facts.h

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// Copyright (c) 2019 Google LLC
//
// 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 SOURCE_FUZZ_FACT_MANAGER_IRRELEVANT_VALUE_FACTS_H_
#define SOURCE_FUZZ_FACT_MANAGER_IRRELEVANT_VALUE_FACTS_H_
#include <unordered_set>
#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
#include "source/opt/ir_context.h"
namespace spvtools {
namespace fuzz {
namespace fact_manager {
// Forward reference to the DataSynonymAndIdEquationFacts class.
class DataSynonymAndIdEquationFacts;
// Forward reference to the DeadBlockFacts class.
class DeadBlockFacts;
// The purpose of this class is to group the fields and data used to represent
// facts about various irrelevant values in the module.
class IrrelevantValueFacts {
public:
explicit IrrelevantValueFacts(opt::IRContext* ir_context);
// See method in FactManager which delegates to this method. Returns true if
// |fact.pointer_id()| is a result id of pointer type in the |ir_context_| and
// |fact.pointer_id()| does not participate in DataSynonym facts. Returns
// false otherwise. |data_synonym_and_id_equation_facts| and |context| are
// passed for consistency checks.
bool MaybeAddFact(
const protobufs::FactPointeeValueIsIrrelevant& fact,
const DataSynonymAndIdEquationFacts& data_synonym_and_id_equation_facts);
// See method in FactManager which delegates to this method. Returns true if
// |fact.result_id()| is a result id of non-pointer type in the |ir_context_|
// and |fact.result_id()| does not participate in DataSynonym facts. Returns
// false otherwise. |data_synonym_and_id_equation_facts| and |context| are
// passed for consistency checks.
bool MaybeAddFact(
const protobufs::FactIdIsIrrelevant& fact,
const DataSynonymAndIdEquationFacts& data_synonym_and_id_equation_facts);
// See method in FactManager which delegates to this method.
bool PointeeValueIsIrrelevant(uint32_t pointer_id) const;
// See method in FactManager which delegates to this method.
// |dead_block_facts| and |context| are passed to check whether |result_id| is
// declared inside a dead block, in which case it is irrelevant.
bool IdIsIrrelevant(uint32_t result_id,
const DeadBlockFacts& dead_block_facts) const;
// See method in FactManager which delegates to this method.
// |dead_block_facts| and |context| are passed to also add all the ids
// declared in dead blocks to the set of irrelevant ids.
std::unordered_set<uint32_t> GetIrrelevantIds(
const DeadBlockFacts& dead_block_facts) const;
private:
std::unordered_set<uint32_t> pointers_to_irrelevant_pointees_ids_;
std::unordered_set<uint32_t> irrelevant_ids_;
opt::IRContext* ir_context_;
};
} // namespace fact_manager
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_FACT_MANAGER_IRRELEVANT_VALUE_FACTS_H_