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// Copyright (c) 2020 Vasyl Teliman
//
// 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_REPLACE_PARAMS_WITH_STRUCT_H_
#define SOURCE_FUZZ_TRANSFORMATION_REPLACE_PARAMS_WITH_STRUCT_H_
#include <map>
#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 TransformationReplaceParamsWithStruct : public Transformation {
public:
explicit TransformationReplaceParamsWithStruct(
protobufs::TransformationReplaceParamsWithStruct message);
TransformationReplaceParamsWithStruct(
const std::vector<uint32_t>& parameter_id,
uint32_t fresh_function_type_id, uint32_t fresh_parameter_id,
const std::map<uint32_t, uint32_t>& caller_id_to_fresh_composite_id);
// - Each element of |parameter_id| is a valid result id of some
// OpFunctionParameter instruction. All parameter ids must correspond to
// parameters of the same function. That function may not be an entry-point
// function.
// - Types of all parameters must be supported by this transformation (see
// IsParameterTypeSupported method).
// - |parameter_id| may not be empty or contain duplicates.
// - There must exist an OpTypeStruct instruction containing types of all
// replaced parameters. Type of the i'th component of the struct is equal
// to the type of the instruction with result id |parameter_id[i]|.
// - |caller_id_to_fresh_composite_id| should contain a key for at least every
// result id of an OpFunctionCall instruction that calls the function.
// - |fresh_function_type_id|, |fresh_parameter_id|,
// |caller_id_to_fresh_composite_id| are all fresh and unique ids.
bool IsApplicable(
opt::IRContext* ir_context,
const TransformationContext& transformation_context) const override;
// - Creates a new function parameter with result id |fresh_parameter_id|.
// Parameter's type is OpTypeStruct with each components type equal to the
// type of the replaced parameter.
// - OpCompositeConstruct with result id from |fresh_composite_id| is inserted
// before each OpFunctionCall instruction.
// - OpCompositeExtract with result id equal to the result id of the replaced
// parameter is created in the function.
void Apply(opt::IRContext* ir_context,
TransformationContext* transformation_context) const override;
std::unordered_set<uint32_t> GetFreshIds() const override;
protobufs::Transformation ToMessage() const override;
// Returns true if parameter's type is supported by this transformation.
static bool IsParameterTypeSupported(opt::IRContext* ir_context,
uint32_t param_type_id);
private:
// Returns a result id of the OpTypeStruct instruction required by this
// transformation (see docs on the IsApplicable method to learn more).
uint32_t MaybeGetRequiredStructType(opt::IRContext* ir_context) const;
// Returns a vector of indices of parameters to replace. Concretely, i'th
// element is the index of the parameter with result id |parameter_id[i]| in
// its function.
std::vector<uint32_t> ComputeIndicesOfReplacedParameters(
opt::IRContext* ir_context) const;
protobufs::TransformationReplaceParamsWithStruct message_;
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_TRANSFORMATION_REPLACE_PARAMS_WITH_STRUCT_H_
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