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// Copyright (c) 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef SOURCE_FUZZ_TRANSFORMATION_COMPOSITE_EXTRACT_H_
#define SOURCE_FUZZ_TRANSFORMATION_COMPOSITE_EXTRACT_H_
#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
#include "source/fuzz/transformation.h"
#include "source/fuzz/transformation_context.h"
#include "source/opt/ir_context.h"
namespace spvtools {
namespace fuzz {
class TransformationCompositeExtract : public Transformation {
public:
explicit TransformationCompositeExtract(
protobufs::TransformationCompositeExtract message);
TransformationCompositeExtract(
const protobufs::InstructionDescriptor& instruction_to_insert_before,
uint32_t fresh_id, uint32_t composite_id,
const std::vector<uint32_t>& index);
// - |message_.fresh_id| must be available
// - |message_.instruction_to_insert_before| must identify an instruction
// before which it is valid to place an OpCompositeExtract
// - |message_.composite_id| must be the id of an instruction that defines
// a composite object, and this id must be available at the instruction
// identified by |message_.instruction_to_insert_before|
// - |message_.index| must be a suitable set of indices for
// |message_.composite_id|, i.e. it must be possible to follow this chain
// of indices to reach a sub-object of |message_.composite_id|
bool IsApplicable(
opt::IRContext* ir_context,
const TransformationContext& transformation_context) const override;
// Adds an OpCompositeConstruct instruction before the instruction identified
// by |message_.instruction_to_insert_before|, that extracts from
// |message_.composite_id| via indices |message_.index| into
// |message_.fresh_id|.
//
// Adds a synonym fact associating |message_.fresh_id| with the relevant
// element of |message_.composite_id|, as long as these ids support synonym
// creation.
void Apply(opt::IRContext* ir_context,
TransformationContext* transformation_context) const override;
std::unordered_set<uint32_t> GetFreshIds() const override;
protobufs::Transformation ToMessage() const override;
private:
// Helper method for adding data synonym facts when applying the
// transformation to |ir_context| and |transformation_context|.
void AddDataSynonymFacts(opt::IRContext* ir_context,
TransformationContext* transformation_context) const;
protobufs::TransformationCompositeExtract message_;
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_TRANSFORMATION_COMPOSITE_EXTRACT_H_
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