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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_int.h"
#include "source/fuzz/fuzzer_util.h"
namespace spvtools {
namespace fuzz {
TransformationAddTypeInt::TransformationAddTypeInt(
protobufs::TransformationAddTypeInt message)
: message_(std::move(message)) {}
TransformationAddTypeInt::TransformationAddTypeInt(uint32_t fresh_id,
uint32_t width,
bool is_signed) {
message_.set_fresh_id(fresh_id);
message_.set_width(width);
message_.set_is_signed(is_signed);
}
bool TransformationAddTypeInt::IsApplicable(
opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
// The id must be fresh.
if (!fuzzerutil::IsFreshId(ir_context, message_.fresh_id())) {
return false;
}
// Checks integer type width capabilities.
switch (message_.width()) {
case 8:
// The Int8 capability must be present.
if (!ir_context->get_feature_mgr()->HasCapability(SpvCapabilityInt8)) {
return false;
}
break;
case 16:
// The Int16 capability must be present.
if (!ir_context->get_feature_mgr()->HasCapability(SpvCapabilityInt16)) {
return false;
}
break;
case 32:
// No capabilities needed.
break;
case 64:
// The Int64 capability must be present.
if (!ir_context->get_feature_mgr()->HasCapability(SpvCapabilityInt64)) {
return false;
}
break;
default:
assert(false && "Unexpected integer type width");
return false;
}
// Applicable if there is no int type with this width and signedness already
// declared in the module.
return fuzzerutil::MaybeGetIntegerType(ir_context, message_.width(),
message_.is_signed()) == 0;
}
void TransformationAddTypeInt::Apply(opt::IRContext* ir_context,
TransformationContext* /*unused*/) const {
auto type_instruction = MakeUnique<opt::Instruction>(
ir_context, SpvOpTypeInt, 0, message_.fresh_id(),
opt::Instruction::OperandList{
{SPV_OPERAND_TYPE_LITERAL_INTEGER, {message_.width()}},
{SPV_OPERAND_TYPE_LITERAL_INTEGER,
{message_.is_signed() ? 1u : 0u}}});
auto type_instruction_ptr = type_instruction.get();
ir_context->module()->AddType(std::move(type_instruction));
fuzzerutil::UpdateModuleIdBound(ir_context, message_.fresh_id());
// Inform the def use manager that there is a new definition. Invalidate the
// type manager since we have added a new type.
ir_context->get_def_use_mgr()->AnalyzeInstDef(type_instruction_ptr);
ir_context->InvalidateAnalyses(opt::IRContext::kAnalysisTypes);
}
protobufs::Transformation TransformationAddTypeInt::ToMessage() const {
protobufs::Transformation result;
*result.mutable_add_type_int() = message_;
return result;
}
std::unordered_set<uint32_t> TransformationAddTypeInt::GetFreshIds() const {
return {message_.fresh_id()};
}
} // namespace fuzz
} // namespace spvtools
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