mirror of
https://github.com/KhronosGroup/SPIRV-Tools
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54 lines
1.9 KiB
C
54 lines
1.9 KiB
C
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// Copyright (c) 2020 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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#ifndef SOURCE_FUZZ_COMPARATOR_BLOCKS_DEEP_FIRST_H_
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#define SOURCE_FUZZ_COMPARATOR_BLOCKS_DEEP_FIRST_H_
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#include "source/fuzz/fuzzer_util.h"
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#include "source/opt/ir_context.h"
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namespace spvtools {
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namespace fuzz {
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// Comparator for blocks, comparing them based on how deep they are nested
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// inside selection or loop constructs. Deeper blocks are considered less than
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// ones that are not as deep. The blocks are required to be in the same
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// function.
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class ComparatorDeepBlocksFirst {
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public:
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explicit ComparatorDeepBlocksFirst(opt::IRContext* ir_context)
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: ir_context_(ir_context) {}
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bool operator()(uint32_t bb1, uint32_t bb2) const {
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return this->operator()(fuzzerutil::MaybeFindBlock(ir_context_, bb1),
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fuzzerutil::MaybeFindBlock(ir_context_, bb2));
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}
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bool operator()(const opt::BasicBlock* bb1, opt::BasicBlock* bb2) const {
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assert(bb1 && bb2 && "The blocks must exist.");
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assert(bb1->GetParent() == bb2->GetParent() &&
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"The blocks must be in the same functions.");
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return ir_context_->GetStructuredCFGAnalysis()->NestingDepth(bb1->id()) >
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ir_context_->GetStructuredCFGAnalysis()->NestingDepth(bb2->id());
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}
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private:
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opt::IRContext* ir_context_;
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};
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} // namespace fuzz
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} // namespace spvtools
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#endif // SOURCE_FUZZ_COMPARATOR_BLOCKS_DEEP_FIRST_H_
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