source/fuzz/fact_manager/irrelevant_value_facts.cpp

// 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.

#include "source/fuzz/fact_manager/irrelevant_value_facts.h"

#include "source/fuzz/data_descriptor.h"
#include "source/fuzz/fact_manager/data_synonym_and_id_equation_facts.h"
#include "source/opt/ir_context.h"

namespace spvtools {
namespace fuzz {
namespace fact_manager {

void IrrelevantValueFacts::AddFact(
    const protobufs::FactPointeeValueIsIrrelevant& fact,
    const DataSynonymAndIdEquationFacts& data_synonym_and_id_equation_facts,
    opt::IRContext* context) {
  (void)data_synonym_and_id_equation_facts;  // Keep release compilers happy.
  assert(data_synonym_and_id_equation_facts.GetSynonymsForId(fact.pointer_id())
             .empty() &&
         "The id cannot participate in DataSynonym facts.");
  auto pointer_def = context->get_def_use_mgr()->GetDef(fact.pointer_id());
  assert(pointer_def && "The id must exist in the module.");
  auto type = context->get_type_mgr()->GetType(pointer_def->type_id());
  (void)type;  // Keep release compilers happy.
  assert(type && type->AsPointer() && "The id must be a pointer.");

  pointers_to_irrelevant_pointees_ids_.insert(fact.pointer_id());
}

void IrrelevantValueFacts::AddFact(
    const protobufs::FactIdIsIrrelevant& fact,
    const DataSynonymAndIdEquationFacts& data_synonym_and_id_equation_facts,
    opt::IRContext* context) {
  (void)data_synonym_and_id_equation_facts;  // Keep release compilers happy.
  assert(data_synonym_and_id_equation_facts.GetSynonymsForId(fact.result_id())
             .empty() &&
         "The id cannot participate in DataSynonym facts.");
  auto pointer_def = context->get_def_use_mgr()->GetDef(fact.result_id());
  assert(pointer_def && "The id must exist in the module.");
  auto type = context->get_type_mgr()->GetType(pointer_def->type_id());
  (void)type;  // Keep release compilers happy.
  assert(type && !type->AsPointer() && "The id must not be a pointer.");

  irrelevant_ids_.insert(fact.result_id());
}

bool IrrelevantValueFacts::PointeeValueIsIrrelevant(uint32_t pointer_id) const {
  return pointers_to_irrelevant_pointees_ids_.count(pointer_id) != 0;
}

bool IrrelevantValueFacts::IdIsIrrelevant(uint32_t pointer_id) const {
  return irrelevant_ids_.count(pointer_id) != 0;
}

const std::unordered_set<uint32_t>& IrrelevantValueFacts::GetIrrelevantIds()
    const {
  return irrelevant_ids_;
}

}  // namespace fact_manager
}  // namespace fuzz
}  // namespace spvtools