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https://github.com/KhronosGroup/SPIRV-Tools
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4a00a80c40
This pass randomly add breaks to the merge blocks of selection and loop constructs, such that the breaking edges will not be dynamically reachable.
49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
// Copyright (c) 2019 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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#include "source/fuzz/fuzzer_context.h"
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namespace spvtools {
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namespace fuzz {
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namespace {
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// Default probabilities for applying various transformations.
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// All values are percentages.
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// Keep them in alphabetical order.
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const uint32_t kDefaultChanceOfAddingDeadBreak = 20;
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const uint32_t kDefaultChanceOfMovingBlockDown = 25;
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const uint32_t kDefaultChanceOfSplittingBlock = 20;
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} // namespace
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FuzzerContext::FuzzerContext(RandomGenerator* random_generator,
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uint32_t min_fresh_id)
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: random_generator_(random_generator),
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next_fresh_id_(min_fresh_id),
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chance_of_adding_dead_break_(kDefaultChanceOfAddingDeadBreak),
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chance_of_moving_block_down_(kDefaultChanceOfMovingBlockDown),
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chance_of_splitting_block_(kDefaultChanceOfSplittingBlock) {}
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FuzzerContext::~FuzzerContext() = default;
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uint32_t FuzzerContext::GetFreshId() { return next_fresh_id_++; }
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RandomGenerator* FuzzerContext::GetRandomGenerator() {
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return random_generator_;
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}
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} // namespace fuzz
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} // namespace spvtools
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