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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.
#ifndef SOURCE_FUZZ_FUZZER_PASS_APPLY_ID_SYNONYMS_H_
#define SOURCE_FUZZ_FUZZER_PASS_APPLY_ID_SYNONYMS_H_
#include "source/fuzz/fuzzer_pass.h"
#include "source/opt/ir_context.h"
namespace spvtools {
namespace fuzz {
// A pass that replaces ids with other ids, or accesses into structures, that
// are known to hold the same values.
class FuzzerPassApplyIdSynonyms : public FuzzerPass {
public:
FuzzerPassApplyIdSynonyms(opt::IRContext* ir_context,
TransformationContext* transformation_context,
FuzzerContext* fuzzer_context,
protobufs::TransformationSequence* transformations,
bool ignore_inapplicable_transformations);
void Apply() override;
private:
// Returns true if uses of |dd1| can be replaced with |dd2| and vice-versa
// with respect to the type. Concretely, returns true if |dd1| and |dd2| have
// the same type or both |dd1| and |dd2| are either a numerical or a vector
// type of integral components with possibly different signedness.
bool DataDescriptorsHaveCompatibleTypes(spv::Op opcode,
uint32_t use_in_operand_index,
const protobufs::DataDescriptor& dd1,
const protobufs::DataDescriptor& dd2);
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_FUZZER_PASS_APPLY_ID_SYNONYMS_H_
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