blob: 467e613493e3291a88c3403e2b580ad4fcdd962f [file] [log] [blame]
// 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/fuzzer_pass_replace_adds_subs_muls_with_carrying_extended.h"
#include "source/fuzz/fuzzer_util.h"
#include "source/fuzz/transformation_replace_add_sub_mul_with_carrying_extended.h"
namespace spvtools {
namespace fuzz {
namespace {
const uint32_t kArithmeticInstructionIndexLeftInOperand = 0;
} // namespace
FuzzerPassReplaceAddsSubsMulsWithCarryingExtended::
FuzzerPassReplaceAddsSubsMulsWithCarryingExtended(
opt::IRContext* ir_context,
TransformationContext* transformation_context,
FuzzerContext* fuzzer_context,
protobufs::TransformationSequence* transformations,
bool ignore_inapplicable_transformations)
: FuzzerPass(ir_context, transformation_context, fuzzer_context,
transformations, ignore_inapplicable_transformations) {}
void FuzzerPassReplaceAddsSubsMulsWithCarryingExtended::Apply() {
std::vector<opt::Instruction> instructions_for_transformation;
for (auto& function : *GetIRContext()->module()) {
for (auto& block : function) {
for (auto& instruction : block) {
// Randomly decide whether to apply the transformation.
if (!GetFuzzerContext()->ChoosePercentage(
GetFuzzerContext()
->GetChanceOfReplacingAddSubMulWithCarryingExtended())) {
continue;
}
// Check if the transformation can be applied to this instruction.
if (!TransformationReplaceAddSubMulWithCarryingExtended::
IsInstructionSuitable(GetIRContext(), instruction)) {
continue;
}
instructions_for_transformation.push_back(instruction);
}
}
}
for (auto& instruction : instructions_for_transformation) {
// Get the operand type id. We know that both operands have the same
// type.
uint32_t operand_type_id =
GetIRContext()
->get_def_use_mgr()
->GetDef(instruction.GetSingleWordInOperand(
kArithmeticInstructionIndexLeftInOperand))
->type_id();
// Ensure the required struct type exists. The struct type is based on
// the operand type.
FindOrCreateStructType({operand_type_id, operand_type_id});
ApplyTransformation(TransformationReplaceAddSubMulWithCarryingExtended(
GetFuzzerContext()->GetFreshId(), instruction.result_id()));
}
}
} // namespace fuzz
} // namespace spvtools