SPIRV-Tools/source/fuzz/fuzzer_pass_construct_composites.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_FUZZER_PASS_CONSTRUCT_COMPOSITES_H_
#define SOURCE_FUZZ_FUZZER_PASS_CONSTRUCT_COMPOSITES_H_
#include "source/fuzz/fuzzer_pass.h"
#include <map>
#include <vector>
namespace spvtools {
namespace fuzz {
// A fuzzer pass for constructing composite objects from smaller objects.
class FuzzerPassConstructComposites : public FuzzerPass {
public:
FuzzerPassConstructComposites(
opt::IRContext* ir_context, FactManager* fact_manager,
FuzzerContext* fuzzer_context,
protobufs::TransformationSequence* transformations);
~FuzzerPassConstructComposites();
void Apply() override;
private:
// Used to map a type id to relevant instructions whose result type matches
// the type id.
typedef std::map<uint32_t, std::vector<opt::Instruction*>>
TypeIdToInstructions;
// Considers all instructions that are available at |inst| - instructions
// whose results could be packed into a composite - and updates
// |type_id_to_available_instructions| so that each such instruction is
// associated with its the id of its result type.
void RecordAvailableInstruction(
opt::Instruction* inst,
TypeIdToInstructions* type_id_to_available_instructions);
// Attempts to find suitable instruction result ids from the values of
// |type_id_to_available_instructions| that would allow a composite of type
// |array_type| to be constructed. Returns said ids if they can be found.
// Returns |nullptr| otherwise.
std::unique_ptr<std::vector<uint32_t>> TryConstructingArrayComposite(
const opt::analysis::Array& array_type,
const TypeIdToInstructions& type_id_to_available_instructions);
// Similar to TryConstructingArrayComposite, but for matrices.
std::unique_ptr<std::vector<uint32_t>> TryConstructingMatrixComposite(
const opt::analysis::Matrix& matrix_type,
const TypeIdToInstructions& type_id_to_available_instructions);
// Similar to TryConstructingArrayComposite, but for structs.
std::unique_ptr<std::vector<uint32_t>> TryConstructingStructComposite(
const opt::analysis::Struct& struct_type,
const TypeIdToInstructions& type_id_to_available_instructions);
// Similar to TryConstructingArrayComposite, but for vectors.
std::unique_ptr<std::vector<uint32_t>> TryConstructingVectorComposite(
const opt::analysis::Vector& vector_type,
const TypeIdToInstructions& type_id_to_available_instructions);
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_FUZZER_PASS_CONSTRUCT_COMPOSITES_H_