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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.
#ifndef SOURCE_FUZZ_FUZZER_PASS_INTERCHANGE_SIGNEDNESS_OF_INTEGER_OPERANDS_H_
#define SOURCE_FUZZ_FUZZER_PASS_INTERCHANGE_SIGNEDNESS_OF_INTEGER_OPERANDS_H_
#include "source/fuzz/fuzzer_pass.h"
namespace spvtools {
namespace fuzz {
// A pass that:
// - Finds all the integer constant (scalar and vector) definitions in the
// module and adds the definitions of the integer with the same data words but
// opposite signedness. If the synonym is already in the module, it does not
// add a new one.
// - For each use of an integer constant where its signedness does not matter,
// decides whether to change it to the id of the toggled constant.
class FuzzerPassInterchangeSignednessOfIntegerOperands : public FuzzerPass {
public:
FuzzerPassInterchangeSignednessOfIntegerOperands(
opt::IRContext* ir_context, TransformationContext* transformation_context,
FuzzerContext* fuzzer_context,
protobufs::TransformationSequence* transformations,
bool ignore_inapplicable_transformations);
void Apply() override;
private:
// Given the id of an integer constant (scalar or vector), it finds or creates
// the corresponding toggled constant (the integer with the same data words
// but opposite signedness). Returns the id of the toggled instruction if the
// constant is an integer scalar or vector, 0 otherwise.
uint32_t FindOrCreateToggledIntegerConstant(uint32_t id);
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_FUZZER_PASS_INTERCHANGE_SIGNEDNESS_OF_INTEGER_OPERANDS_H_