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// Copyright (c) 2020 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_null.h"
#include "source/fuzz/fuzzer_util.h"
namespace spvtools {
namespace fuzz {
TransformationAddConstantNull::TransformationAddConstantNull(
const spvtools::fuzz::protobufs::TransformationAddConstantNull& message)
: message_(message) {}
TransformationAddConstantNull::TransformationAddConstantNull(uint32_t fresh_id,
uint32_t type_id) {
message_.set_fresh_id(fresh_id);
message_.set_type_id(type_id);
}
bool TransformationAddConstantNull::IsApplicable(
opt::IRContext* context, const TransformationContext& /*unused*/) const {
// A fresh id is required.
if (!fuzzerutil::IsFreshId(context, message_.fresh_id())) {
return false;
}
auto type = context->get_type_mgr()->GetType(message_.type_id());
// The type must exist.
if (!type) {
return false;
}
// The type must be one of the types for which null constants are allowed,
// according to the SPIR-V spec.
return fuzzerutil::IsNullConstantSupported(*type);
}
void TransformationAddConstantNull::Apply(
opt::IRContext* context, TransformationContext* /*unused*/) const {
context->module()->AddGlobalValue(MakeUnique<opt::Instruction>(
context, SpvOpConstantNull, message_.type_id(), message_.fresh_id(),
opt::Instruction::OperandList()));
fuzzerutil::UpdateModuleIdBound(context, message_.fresh_id());
// We have added an instruction to the module, so need to be careful about the
// validity of existing analyses.
context->InvalidateAnalysesExceptFor(opt::IRContext::Analysis::kAnalysisNone);
}
protobufs::Transformation TransformationAddConstantNull::ToMessage() const {
protobufs::Transformation result;
*result.mutable_add_constant_null() = message_;
return result;
}
std::unordered_set<uint32_t> TransformationAddConstantNull::GetFreshIds()
const {
return {message_.fresh_id()};
}
} // namespace fuzz
} // namespace spvtools
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