53 строки
2.0 KiB
C++
53 строки
2.0 KiB
C++
// Copyright (c) 2020 Stefano Milizia
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// Copyright (c) 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SOURCE_FUZZ_FUZZER_PASS_INTERCHANGE_ZERO_LIKE_CONSTANTS_H_
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#define SOURCE_FUZZ_FUZZER_PASS_INTERCHANGE_ZERO_LIKE_CONSTANTS_H_
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#include "source/fuzz/fuzzer_pass.h"
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namespace spvtools {
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namespace fuzz {
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// A pass that:
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// - Finds all the zero-like constant definitions in the module and adds the
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// definitions of the corresponding synonym, recording the fact that they
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// are synonymous. If the synonym is already in the module, it does not
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// add a new one.
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// - For each use of a zero-like constant, decides whether to change it to the
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// id of the toggled constant.
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class FuzzerPassInterchangeZeroLikeConstants : public FuzzerPass {
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public:
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FuzzerPassInterchangeZeroLikeConstants(
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opt::IRContext* ir_context, TransformationContext* transformation_context,
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FuzzerContext* fuzzer_context,
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protobufs::TransformationSequence* transformations,
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bool ignore_inapplicable_transformations);
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void Apply() override;
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private:
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// Given the declaration of a zero-like constant, it finds or creates the
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// corresponding toggled constant (a scalar constant of value 0 becomes a
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// null constant of the same type and vice versa).
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// Returns the id of the toggled instruction if the constant is zero-like,
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// 0 otherwise.
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uint32_t FindOrCreateToggledConstant(opt::Instruction* declaration);
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};
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} // namespace fuzz
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} // namespace spvtools
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#endif // SOURCE_FUZZ_FUZZER_PASS_INTERCHANGE_ZERO_LIKE_CONSTANTS_H_
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