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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_CONSTANT_UNIFORM_FACTS_H_
#define SOURCE_FUZZ_FACT_MANAGER_CONSTANT_UNIFORM_FACTS_H_
#include <vector>
#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
#include "source/opt/ir_context.h"
namespace spvtools {
namespace fuzz {
namespace fact_manager {
// The purpose of this class is to group the fields and data used to represent
// facts about uniform constants.
class ConstantUniformFacts {
public:
explicit ConstantUniformFacts(opt::IRContext* ir_context);
// See method in FactManager which delegates to this method.
bool MaybeAddFact(const protobufs::FactConstantUniform& fact);
// See method in FactManager which delegates to this method.
std::vector<uint32_t> GetConstantsAvailableFromUniformsForType(
uint32_t type_id) const;
// See method in FactManager which delegates to this method.
std::vector<protobufs::UniformBufferElementDescriptor>
GetUniformDescriptorsForConstant(uint32_t constant_id) const;
// See method in FactManager which delegates to this method.
uint32_t GetConstantFromUniformDescriptor(
const protobufs::UniformBufferElementDescriptor& uniform_descriptor)
const;
// See method in FactManager which delegates to this method.
std::vector<uint32_t> GetTypesForWhichUniformValuesAreKnown() const;
// See method in FactManager which delegates to this method.
const std::vector<std::pair<protobufs::FactConstantUniform, uint32_t>>&
GetConstantUniformFactsAndTypes() const;
private:
// Returns true if and only if the words associated with
// |constant_instruction| exactly match the words for the constant associated
// with |constant_uniform_fact|.
static bool DataMatches(
const opt::Instruction& constant_instruction,
const protobufs::FactConstantUniform& constant_uniform_fact);
// Yields the constant words associated with |constant_uniform_fact|.
static std::vector<uint32_t> GetConstantWords(
const protobufs::FactConstantUniform& constant_uniform_fact);
// Yields the id of a constant of type |type_id| whose data matches the
// constant data in |constant_uniform_fact|, or 0 if no such constant is
// declared.
uint32_t GetConstantId(
const protobufs::FactConstantUniform& constant_uniform_fact,
uint32_t type_id) const;
// Checks that the width of a floating-point constant is supported, and that
// the constant is finite.
static bool FloatingPointValueIsSuitable(
const protobufs::FactConstantUniform& fact, uint32_t width);
std::vector<std::pair<protobufs::FactConstantUniform, uint32_t>>
facts_and_type_ids_;
opt::IRContext* ir_context_;
};
} // namespace fact_manager
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_FACT_MANAGER_CONSTANT_UNIFORM_FACTS_H_
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