mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-10-20 03:50:05 +00:00
3daabd3212
A transformation that replaces the use of an irrelevant id with another id of the same type. The related fuzzer pass, for every use of an irrelevant id, checks whether the id can be replaced in that use by another id of the same type and randomly decides whether to replace it. Fixes #3503.
249 lines
8.1 KiB
C++
249 lines
8.1 KiB
C++
// Copyright (c) 2019 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "fact_manager.h"
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#include <sstream>
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#include <unordered_map>
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#include "source/fuzz/uniform_buffer_element_descriptor.h"
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#include "source/opt/ir_context.h"
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namespace spvtools {
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namespace fuzz {
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namespace {
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std::string ToString(const protobufs::FactConstantUniform& fact) {
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std::stringstream stream;
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stream << "(" << fact.uniform_buffer_element_descriptor().descriptor_set()
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<< ", " << fact.uniform_buffer_element_descriptor().binding() << ")[";
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bool first = true;
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for (auto index : fact.uniform_buffer_element_descriptor().index()) {
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if (first) {
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first = false;
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} else {
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stream << ", ";
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}
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stream << index;
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}
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stream << "] == [";
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first = true;
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for (auto constant_word : fact.constant_word()) {
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if (first) {
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first = false;
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} else {
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stream << ", ";
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}
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stream << constant_word;
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}
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stream << "]";
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return stream.str();
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}
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std::string ToString(const protobufs::FactDataSynonym& fact) {
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std::stringstream stream;
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stream << fact.data1() << " = " << fact.data2();
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return stream.str();
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}
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std::string ToString(const protobufs::FactIdEquation& fact) {
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std::stringstream stream;
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stream << fact.lhs_id();
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stream << " " << static_cast<SpvOp>(fact.opcode());
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for (auto rhs_id : fact.rhs_id()) {
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stream << " " << rhs_id;
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}
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return stream.str();
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}
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std::string ToString(const protobufs::Fact& fact) {
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switch (fact.fact_case()) {
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case protobufs::Fact::kConstantUniformFact:
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return ToString(fact.constant_uniform_fact());
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case protobufs::Fact::kDataSynonymFact:
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return ToString(fact.data_synonym_fact());
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case protobufs::Fact::kIdEquationFact:
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return ToString(fact.id_equation_fact());
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default:
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assert(false && "Stringification not supported for this fact.");
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return "";
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}
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}
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} // namespace
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void FactManager::AddFacts(const MessageConsumer& message_consumer,
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const protobufs::FactSequence& initial_facts,
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opt::IRContext* context) {
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for (auto& fact : initial_facts.fact()) {
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if (!AddFact(fact, context)) {
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auto message = "Invalid fact " + ToString(fact) + " ignored.";
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message_consumer(SPV_MSG_WARNING, nullptr, {}, message.c_str());
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}
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}
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}
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bool FactManager::AddFact(const fuzz::protobufs::Fact& fact,
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opt::IRContext* context) {
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switch (fact.fact_case()) {
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case protobufs::Fact::kConstantUniformFact:
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return constant_uniform_facts_.AddFact(fact.constant_uniform_fact(),
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context);
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case protobufs::Fact::kDataSynonymFact:
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data_synonym_and_id_equation_facts_.AddFact(fact.data_synonym_fact(),
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context);
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return true;
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case protobufs::Fact::kBlockIsDeadFact:
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dead_block_facts_.AddFact(fact.block_is_dead_fact());
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return true;
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case protobufs::Fact::kFunctionIsLivesafeFact:
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livesafe_function_facts_.AddFact(fact.function_is_livesafe_fact());
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return true;
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default:
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assert(false && "Unknown fact type.");
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return false;
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}
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}
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void FactManager::AddFactDataSynonym(const protobufs::DataDescriptor& data1,
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const protobufs::DataDescriptor& data2,
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opt::IRContext* context) {
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protobufs::FactDataSynonym fact;
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*fact.mutable_data1() = data1;
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*fact.mutable_data2() = data2;
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data_synonym_and_id_equation_facts_.AddFact(fact, context);
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}
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std::vector<uint32_t> FactManager::GetConstantsAvailableFromUniformsForType(
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opt::IRContext* ir_context, uint32_t type_id) const {
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return constant_uniform_facts_.GetConstantsAvailableFromUniformsForType(
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ir_context, type_id);
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}
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std::vector<protobufs::UniformBufferElementDescriptor>
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FactManager::GetUniformDescriptorsForConstant(opt::IRContext* ir_context,
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uint32_t constant_id) const {
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return constant_uniform_facts_.GetUniformDescriptorsForConstant(ir_context,
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constant_id);
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}
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uint32_t FactManager::GetConstantFromUniformDescriptor(
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opt::IRContext* context,
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const protobufs::UniformBufferElementDescriptor& uniform_descriptor) const {
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return constant_uniform_facts_.GetConstantFromUniformDescriptor(
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context, uniform_descriptor);
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}
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std::vector<uint32_t> FactManager::GetTypesForWhichUniformValuesAreKnown()
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const {
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return constant_uniform_facts_.GetTypesForWhichUniformValuesAreKnown();
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}
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const std::vector<std::pair<protobufs::FactConstantUniform, uint32_t>>&
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FactManager::GetConstantUniformFactsAndTypes() const {
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return constant_uniform_facts_.GetConstantUniformFactsAndTypes();
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}
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std::vector<uint32_t> FactManager::GetIdsForWhichSynonymsAreKnown() const {
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return data_synonym_and_id_equation_facts_.GetIdsForWhichSynonymsAreKnown();
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}
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std::vector<const protobufs::DataDescriptor*>
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FactManager::GetSynonymsForDataDescriptor(
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const protobufs::DataDescriptor& data_descriptor) const {
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return data_synonym_and_id_equation_facts_.GetSynonymsForDataDescriptor(
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data_descriptor);
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}
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std::vector<const protobufs::DataDescriptor*> FactManager::GetSynonymsForId(
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uint32_t id) const {
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return GetSynonymsForDataDescriptor(MakeDataDescriptor(id, {}));
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}
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bool FactManager::IsSynonymous(
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const protobufs::DataDescriptor& data_descriptor1,
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const protobufs::DataDescriptor& data_descriptor2) const {
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return data_synonym_and_id_equation_facts_.IsSynonymous(data_descriptor1,
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data_descriptor2);
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}
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bool FactManager::BlockIsDead(uint32_t block_id) const {
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return dead_block_facts_.BlockIsDead(block_id);
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}
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void FactManager::AddFactBlockIsDead(uint32_t block_id) {
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protobufs::FactBlockIsDead fact;
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fact.set_block_id(block_id);
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dead_block_facts_.AddFact(fact);
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}
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bool FactManager::FunctionIsLivesafe(uint32_t function_id) const {
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return livesafe_function_facts_.FunctionIsLivesafe(function_id);
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}
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void FactManager::AddFactFunctionIsLivesafe(uint32_t function_id) {
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protobufs::FactFunctionIsLivesafe fact;
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fact.set_function_id(function_id);
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livesafe_function_facts_.AddFact(fact);
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}
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bool FactManager::PointeeValueIsIrrelevant(uint32_t pointer_id) const {
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return irrelevant_value_facts_.PointeeValueIsIrrelevant(pointer_id);
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}
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bool FactManager::IdIsIrrelevant(uint32_t result_id) const {
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return irrelevant_value_facts_.IdIsIrrelevant(result_id);
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}
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const std::unordered_set<uint32_t>& FactManager::GetIrrelevantIds() const {
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return irrelevant_value_facts_.GetIrrelevantIds();
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}
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void FactManager::AddFactValueOfPointeeIsIrrelevant(uint32_t pointer_id) {
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protobufs::FactPointeeValueIsIrrelevant fact;
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fact.set_pointer_id(pointer_id);
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irrelevant_value_facts_.AddFact(fact);
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}
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void FactManager::AddFactIdIsIrrelevant(uint32_t result_id) {
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protobufs::FactIdIsIrrelevant fact;
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fact.set_result_id(result_id);
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irrelevant_value_facts_.AddFact(fact);
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}
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void FactManager::AddFactIdEquation(uint32_t lhs_id, SpvOp opcode,
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const std::vector<uint32_t>& rhs_id,
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opt::IRContext* context) {
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protobufs::FactIdEquation fact;
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fact.set_lhs_id(lhs_id);
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fact.set_opcode(opcode);
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for (auto an_rhs_id : rhs_id) {
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fact.add_rhs_id(an_rhs_id);
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}
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data_synonym_and_id_equation_facts_.AddFact(fact, context);
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}
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void FactManager::ComputeClosureOfFacts(
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opt::IRContext* ir_context, uint32_t maximum_equivalence_class_size) {
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data_synonym_and_id_equation_facts_.ComputeClosureOfFacts(
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ir_context, maximum_equivalence_class_size);
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}
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} // namespace fuzz
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} // namespace spvtools
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