mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-26 21:30:07 +00:00
3724cfbea8
When a data synonym fact about two composites is added, data synonym facts between all sub-components of the composites are also added. Furthermore, when data synonym facts been all sub-components of two composites are known, a data synonym fact relating the two composites is added. Identification of this case is done in a lazy manner, when questions about data synonym facts are asked. The change introduces helper methods to get the size of an array type and the number of elements of a struct type, and fixes TransformationCompositeExtract to invalidate analyses appropriately.
126 lines
4.6 KiB
C++
126 lines
4.6 KiB
C++
// 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/transformation_composite_extract.h"
|
|
|
|
#include <vector>
|
|
|
|
#include "source/fuzz/data_descriptor.h"
|
|
#include "source/fuzz/fuzzer_util.h"
|
|
#include "source/fuzz/instruction_descriptor.h"
|
|
|
|
namespace spvtools {
|
|
namespace fuzz {
|
|
|
|
TransformationCompositeExtract::TransformationCompositeExtract(
|
|
const spvtools::fuzz::protobufs::TransformationCompositeExtract& message)
|
|
: message_(message) {}
|
|
|
|
TransformationCompositeExtract::TransformationCompositeExtract(
|
|
const protobufs::InstructionDescriptor& instruction_to_insert_before,
|
|
uint32_t fresh_id, uint32_t composite_id, std::vector<uint32_t>&& index) {
|
|
*message_.mutable_instruction_to_insert_before() =
|
|
instruction_to_insert_before;
|
|
message_.set_fresh_id(fresh_id);
|
|
message_.set_composite_id(composite_id);
|
|
for (auto an_index : index) {
|
|
message_.add_index(an_index);
|
|
}
|
|
}
|
|
|
|
bool TransformationCompositeExtract::IsApplicable(
|
|
opt::IRContext* context,
|
|
const spvtools::fuzz::FactManager& /*unused*/) const {
|
|
if (!fuzzerutil::IsFreshId(context, message_.fresh_id())) {
|
|
return false;
|
|
}
|
|
auto instruction_to_insert_before =
|
|
FindInstruction(message_.instruction_to_insert_before(), context);
|
|
if (!instruction_to_insert_before) {
|
|
return false;
|
|
}
|
|
auto composite_instruction =
|
|
context->get_def_use_mgr()->GetDef(message_.composite_id());
|
|
if (!composite_instruction) {
|
|
return false;
|
|
}
|
|
if (auto block = context->get_instr_block(composite_instruction)) {
|
|
if (composite_instruction == instruction_to_insert_before ||
|
|
!context->GetDominatorAnalysis(block->GetParent())
|
|
->Dominates(composite_instruction, instruction_to_insert_before)) {
|
|
return false;
|
|
}
|
|
}
|
|
assert(composite_instruction->type_id() &&
|
|
"An instruction in a block cannot have a result id but no type id.");
|
|
|
|
auto composite_type =
|
|
context->get_type_mgr()->GetType(composite_instruction->type_id());
|
|
if (!composite_type) {
|
|
return false;
|
|
}
|
|
|
|
if (!fuzzerutil::CanInsertOpcodeBeforeInstruction(
|
|
SpvOpCompositeExtract, instruction_to_insert_before)) {
|
|
return false;
|
|
}
|
|
|
|
return fuzzerutil::WalkCompositeTypeIndices(
|
|
context, composite_instruction->type_id(), message_.index()) != 0;
|
|
}
|
|
|
|
void TransformationCompositeExtract::Apply(
|
|
opt::IRContext* context, spvtools::fuzz::FactManager* fact_manager) const {
|
|
opt::Instruction::OperandList extract_operands;
|
|
extract_operands.push_back({SPV_OPERAND_TYPE_ID, {message_.composite_id()}});
|
|
for (auto an_index : message_.index()) {
|
|
extract_operands.push_back({SPV_OPERAND_TYPE_LITERAL_INTEGER, {an_index}});
|
|
}
|
|
auto composite_instruction =
|
|
context->get_def_use_mgr()->GetDef(message_.composite_id());
|
|
auto extracted_type = fuzzerutil::WalkCompositeTypeIndices(
|
|
context, composite_instruction->type_id(), message_.index());
|
|
|
|
FindInstruction(message_.instruction_to_insert_before(), context)
|
|
->InsertBefore(MakeUnique<opt::Instruction>(
|
|
context, SpvOpCompositeExtract, extracted_type, message_.fresh_id(),
|
|
extract_operands));
|
|
|
|
fuzzerutil::UpdateModuleIdBound(context, message_.fresh_id());
|
|
|
|
context->InvalidateAnalysesExceptFor(opt::IRContext::Analysis::kAnalysisNone);
|
|
|
|
// Add the fact that the id storing the extracted element is synonymous with
|
|
// the index into the structure.
|
|
std::vector<uint32_t> indices;
|
|
for (auto an_index : message_.index()) {
|
|
indices.push_back(an_index);
|
|
}
|
|
protobufs::DataDescriptor data_descriptor_for_extracted_element =
|
|
MakeDataDescriptor(message_.composite_id(), std::move(indices));
|
|
protobufs::DataDescriptor data_descriptor_for_result_id =
|
|
MakeDataDescriptor(message_.fresh_id(), {});
|
|
fact_manager->AddFactDataSynonym(data_descriptor_for_extracted_element,
|
|
data_descriptor_for_result_id, context);
|
|
}
|
|
|
|
protobufs::Transformation TransformationCompositeExtract::ToMessage() const {
|
|
protobufs::Transformation result;
|
|
*result.mutable_composite_extract() = message_;
|
|
return result;
|
|
}
|
|
|
|
} // namespace fuzz
|
|
} // namespace spvtools
|