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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_type_function.h"
#include <vector>
#include "source/fuzz/fuzzer_util.h"
namespace spvtools {
namespace fuzz {
TransformationAddTypeFunction::TransformationAddTypeFunction(
protobufs::TransformationAddTypeFunction message)
: message_(std::move(message)) {}
TransformationAddTypeFunction::TransformationAddTypeFunction(
uint32_t fresh_id, uint32_t return_type_id,
const std::vector<uint32_t>& argument_type_ids) {
message_.set_fresh_id(fresh_id);
message_.set_return_type_id(return_type_id);
for (auto id : argument_type_ids) {
message_.add_argument_type_id(id);
}
}
bool TransformationAddTypeFunction::IsApplicable(
opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
// The result id must be fresh.
if (!fuzzerutil::IsFreshId(ir_context, message_.fresh_id())) {
return false;
}
// The return and argument types must be type ids but not not be function
// type ids.
if (!fuzzerutil::IsNonFunctionTypeId(ir_context, message_.return_type_id())) {
return false;
}
for (auto argument_type_id : message_.argument_type_id()) {
if (!fuzzerutil::IsNonFunctionTypeId(ir_context, argument_type_id)) {
return false;
}
}
// Check whether there is already an OpTypeFunction definition that uses
// exactly the same return and argument type ids. (Note that the type manager
// does not allow us to check this, as it does not distinguish between
// function types with different but isomorphic pointer argument types.)
std::vector<uint32_t> type_ids = {message_.return_type_id()};
type_ids.insert(type_ids.end(), message_.argument_type_id().begin(),
message_.argument_type_id().end());
return fuzzerutil::FindFunctionType(ir_context, type_ids) == 0;
}
void TransformationAddTypeFunction::Apply(
opt::IRContext* ir_context, TransformationContext* /*unused*/) const {
std::vector<uint32_t> type_ids = {message_.return_type_id()};
type_ids.insert(type_ids.end(), message_.argument_type_id().begin(),
message_.argument_type_id().end());
fuzzerutil::AddFunctionType(ir_context, message_.fresh_id(), type_ids);
// We have added an instruction to the module, so need to be careful about the
// validity of existing analyses.
ir_context->InvalidateAnalysesExceptFor(
opt::IRContext::Analysis::kAnalysisNone);
}
protobufs::Transformation TransformationAddTypeFunction::ToMessage() const {
protobufs::Transformation result;
*result.mutable_add_type_function() = message_;
return result;
}
std::unordered_set<uint32_t> TransformationAddTypeFunction::GetFreshIds()
const {
return {message_.fresh_id()};
}
} // namespace fuzz
} // namespace spvtools