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// Copyright (c) 2020 André Perez Maselco
//
// 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_expand_vector_reductions.h"
#include "source/fuzz/fuzzer_util.h"
#include "source/fuzz/instruction_descriptor.h"
#include "source/fuzz/transformation_expand_vector_reduction.h"
namespace spvtools {
namespace fuzz {
FuzzerPassExpandVectorReductions::FuzzerPassExpandVectorReductions(
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 FuzzerPassExpandVectorReductions::Apply() {
for (auto& function : *GetIRContext()->module()) {
for (auto& block : function) {
for (auto& instruction : block) {
// Randomly decides whether the transformation will be applied.
if (!GetFuzzerContext()->ChoosePercentage(
GetFuzzerContext()->GetChanceOfExpandingVectorReduction())) {
continue;
}
// |instruction| must be OpAny or OpAll.
if (instruction.opcode() != SpvOpAny &&
instruction.opcode() != SpvOpAll) {
continue;
}
// It must be able to make a synonym of |instruction|.
if (!fuzzerutil::CanMakeSynonymOf(
GetIRContext(), *GetTransformationContext(), instruction)) {
continue;
}
// Applies the expand vector reduction transformation.
ApplyTransformation(TransformationExpandVectorReduction(
instruction.result_id(),
GetFuzzerContext()->GetFreshIds(
TransformationExpandVectorReduction::GetRequiredFreshIdCount(
GetIRContext(), &instruction))));
}
}
}
}
} // namespace fuzz
} // namespace spvtools
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