79 строки
3.2 KiB
C++
79 строки
3.2 KiB
C++
// 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_TRANSFORMATION_REPLACE_LOAD_STORE_WITH_COPY_MEMORY_H_
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#define SOURCE_FUZZ_TRANSFORMATION_REPLACE_LOAD_STORE_WITH_COPY_MEMORY_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/fuzz/transformation_context.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 TransformationReplaceLoadStoreWithCopyMemory : public Transformation {
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public:
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explicit TransformationReplaceLoadStoreWithCopyMemory(
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protobufs::TransformationReplaceLoadStoreWithCopyMemory message);
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TransformationReplaceLoadStoreWithCopyMemory(
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const protobufs::InstructionDescriptor& load_instruction_descriptor,
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const protobufs::InstructionDescriptor& store_instruction_descriptor);
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// - |message_.load_instruction_descriptor| must identify an OpLoad
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// instruction.
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// - |message_.store_instruction_descriptor| must identify an OpStore
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// instruction.
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// - The OpStore must write the intermediate value loaded by the OpLoad.
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// - The OpLoad and the OpStore must not have certain instruction in between
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// (checked by IsMemoryWritingOpCode(), IsMemoryBarrierOpCode(),
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// IsStorageClassSafeAcrossMemoryBarriers()).
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bool IsApplicable(
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opt::IRContext* ir_context,
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const TransformationContext& transformation_context) const override;
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// Takes a pair of instruction descriptors to OpLoad and OpStore that have the
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// same intermediate value and replaces the OpStore with an equivalent
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// OpCopyMemory.
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void Apply(opt::IRContext* ir_context,
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TransformationContext* transformation_context) const override;
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// Checks if the instruction that has an |op_code| might write to
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// the source operand of the OpLoad instruction.
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static bool IsMemoryWritingOpCode(spv::Op op_code);
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// Checks if the instruction that has an |op_code| is a memory barrier that
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// could interfere with the source operand of the OpLoad instruction
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static bool IsMemoryBarrierOpCode(spv::Op op_code);
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// Checks if the |storage_class| of the source operand of the OpLoad
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// instruction implies that this variable cannot change (due to other threads)
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// across memory barriers.
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static bool IsStorageClassSafeAcrossMemoryBarriers(
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spv::StorageClass storage_class);
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std::unordered_set<uint32_t> GetFreshIds() const override;
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protobufs::Transformation ToMessage() const override;
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private:
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protobufs::TransformationReplaceLoadStoreWithCopyMemory 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_REPLACE_LOAD_STORE_WITH_COPY_MEMORY_H_
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