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efde682369
Fixes #2695. Allowing unreachable blocks to be moved can lead to an unreachable block A getting placed after an unreachable successor B, which is a problem if B uses ids that A generates.
55 lines
1.9 KiB
C++
55 lines
1.9 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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#ifndef SOURCE_FUZZ_TRANSFORMATION_MOVE_BLOCK_DOWN_H_
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#define SOURCE_FUZZ_TRANSFORMATION_MOVE_BLOCK_DOWN_H_
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#include "source/fuzz/fact_manager.h"
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#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
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#include "source/fuzz/transformation.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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class TransformationMoveBlockDown : public Transformation {
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public:
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explicit TransformationMoveBlockDown(
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const protobufs::TransformationMoveBlockDown& message);
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explicit TransformationMoveBlockDown(uint32_t id);
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// - |message_.block_id| must be the id of a block b in the given module.
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// - b must not be the first nor last block appearing, in program order,
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// in a function.
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// - b must not dominate the block that follows it in program order.
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// - b must be reachable.
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bool IsApplicable(opt::IRContext* context,
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const FactManager& fact_manager) const override;
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// The block with id |message_.block_id| is moved down; i.e. the program order
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// between it and the block that follows it is swapped.
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void Apply(opt::IRContext* context, FactManager* fact_manager) const override;
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protobufs::Transformation ToMessage() const override;
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private:
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protobufs::TransformationMoveBlockDown message_;
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};
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} // namespace fuzz
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} // namespace spvtools
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#endif // SOURCE_FUZZ_TRANSFORMATION_MOVE_BLOCK_DOWN_H_
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