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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.
#include "source/fuzz/transformation_add_constant_scalar.h"
#include "source/fuzz/fuzzer_util.h"
namespace spvtools {
namespace fuzz {
TransformationAddConstantScalar::TransformationAddConstantScalar(
spvtools::fuzz::protobufs::TransformationAddConstantScalar message)
: message_(std::move(message)) {}
TransformationAddConstantScalar::TransformationAddConstantScalar(
uint32_t fresh_id, uint32_t type_id, const std::vector<uint32_t>& words,
bool is_irrelevant) {
message_.set_fresh_id(fresh_id);
message_.set_type_id(type_id);
message_.set_is_irrelevant(is_irrelevant);
for (auto word : words) {
message_.add_word(word);
}
}
bool TransformationAddConstantScalar::IsApplicable(
opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
// The id needs to be fresh.
if (!fuzzerutil::IsFreshId(ir_context, message_.fresh_id())) {
return false;
}
// The type id for the scalar must exist and be a type.
auto type = ir_context->get_type_mgr()->GetType(message_.type_id());
if (!type) {
return false;
}
uint32_t width;
if (type->AsFloat()) {
width = type->AsFloat()->width();
} else if (type->AsInteger()) {
width = type->AsInteger()->width();
} else {
return false;
}
// The number of words is the integer floor of the width.
auto words = (width + 32 - 1) / 32;
// The number of words provided by the transformation needs to match the
// width of the type.
return static_cast<uint32_t>(message_.word().size()) == words;
}
void TransformationAddConstantScalar::Apply(
opt::IRContext* ir_context,
TransformationContext* transformation_context) const {
auto new_instruction = MakeUnique<opt::Instruction>(
ir_context, spv::Op::OpConstant, message_.type_id(), message_.fresh_id(),
opt::Instruction::OperandList(
{{SPV_OPERAND_TYPE_LITERAL_INTEGER,
std::vector<uint32_t>(message_.word().begin(),
message_.word().end())}}));
auto new_instruction_ptr = new_instruction.get();
ir_context->module()->AddGlobalValue(std::move(new_instruction));
fuzzerutil::UpdateModuleIdBound(ir_context, message_.fresh_id());
// Inform the def-use manager about the new instruction. Invalidate the
// constant manager as we have added a new constant.
ir_context->get_def_use_mgr()->AnalyzeInstDef(new_instruction_ptr);
ir_context->InvalidateAnalyses(opt::IRContext::kAnalysisConstants);
if (message_.is_irrelevant()) {
transformation_context->GetFactManager()->AddFactIdIsIrrelevant(
message_.fresh_id());
}
}
protobufs::Transformation TransformationAddConstantScalar::ToMessage() const {
protobufs::Transformation result;
*result.mutable_add_constant_scalar() = message_;
return result;
}
std::unordered_set<uint32_t> TransformationAddConstantScalar::GetFreshIds()
const {
return {message_.fresh_id()};
}
} // namespace fuzz
} // namespace spvtools
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