mirror of
https://github.com/KhronosGroup/SPIRV-Tools
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66 lines
2.3 KiB
C++
66 lines
2.3 KiB
C++
// Copyright (c) 2020 Vasyl Teliman
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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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#include "source/fuzz/fuzzer_pass_permute_phi_operands.h"
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#include <numeric>
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#include <vector>
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#include "source/fuzz/fuzzer_context.h"
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#include "source/fuzz/fuzzer_util.h"
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#include "source/fuzz/instruction_descriptor.h"
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#include "source/fuzz/transformation_permute_phi_operands.h"
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namespace spvtools {
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namespace fuzz {
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FuzzerPassPermutePhiOperands::FuzzerPassPermutePhiOperands(
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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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: FuzzerPass(ir_context, transformation_context, fuzzer_context,
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transformations) {}
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FuzzerPassPermutePhiOperands::~FuzzerPassPermutePhiOperands() = default;
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void FuzzerPassPermutePhiOperands::Apply() {
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ForEachInstructionWithInstructionDescriptor(
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[this](opt::Function* /*unused*/, opt::BasicBlock* /*unused*/,
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opt::BasicBlock::iterator inst_it,
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const protobufs::InstructionDescriptor& /*unused*/) {
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const auto& inst = *inst_it;
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if (inst.opcode() != SpvOpPhi) {
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return;
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}
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if (!GetFuzzerContext()->ChoosePercentage(
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GetFuzzerContext()->GetChanceOfPermutingPhiOperands())) {
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return;
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}
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// Create a vector of indices for each pair of operands in the |inst|.
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// OpPhi always has an even number of operands.
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std::vector<uint32_t> permutation(inst.NumInOperands() / 2);
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std::iota(permutation.begin(), permutation.end(), 0);
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GetFuzzerContext()->Shuffle(&permutation);
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ApplyTransformation(TransformationPermutePhiOperands(
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inst.result_id(), std::move(permutation)));
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});
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}
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} // namespace fuzz
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} // namespace spvtools
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