mirror of
https://github.com/KhronosGroup/SPIRV-Tools
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65 lines
2.4 KiB
C++
65 lines
2.4 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_instructions.h"
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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_move_instruction_down.h"
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namespace spvtools {
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namespace fuzz {
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FuzzerPassPermuteInstructions::FuzzerPassPermuteInstructions(
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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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FuzzerPassPermuteInstructions::~FuzzerPassPermuteInstructions() = default;
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void FuzzerPassPermuteInstructions::Apply() {
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// We are iterating over all instructions in all basic blocks.
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for (auto& function : *GetIRContext()->module()) {
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for (auto& block : function) {
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// We need to collect all instructions in the block into a separate vector
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// since application of the transformation below might invalidate
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// iterators.
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std::vector<opt::Instruction*> instructions;
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for (auto& instruction : block) {
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instructions.push_back(&instruction);
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}
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// We consider all instructions in reverse to increase the possible number
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// of applied transformations.
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for (auto it = instructions.rbegin(); it != instructions.rend(); ++it) {
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if (!GetFuzzerContext()->ChoosePercentage(
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GetFuzzerContext()->GetChanceOfPermutingInstructions())) {
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continue;
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}
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while (MaybeApplyTransformation(TransformationMoveInstructionDown(
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MakeInstructionDescriptor(GetIRContext(), *it)))) {
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// Apply the transformation as many times as possible.
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}
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}
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}
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}
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}
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} // namespace fuzz
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} // namespace spvtools
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