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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "interpreted_function.h"
#include <vector>
namespace vespalib { class Stash; }
namespace vespalib::eval {
struct ValueBuilderFactory;
struct TensorFunction;
/**
* Meta-data related to the compilation of a tensor function that may
* be optionally collected. Each tensor function tree node will be
* represented by a single 'Step' containing the class name of the
* corresponding tree node and the symbol name of the low-level
* function it compiles to. Steps are ordered according to the
* instructions of the final program. Note that each 'If' node will
* produce 2 steps; one for the conditional jump after the 'if'
* condition has been calculated and one for the unconditional jump
* after the 'true' branch.
**/
struct CTFMetaData {
struct Step {
vespalib::string class_name;
vespalib::string symbol_name;
std::unique_ptr<CTFMetaData> nested;
Step(vespalib::string &&class_name_in,
vespalib::string &&symbol_name_in) noexcept
: class_name(std::move(class_name_in)),
symbol_name(std::move(symbol_name_in)),
nested()
{
}
};
std::vector<Step> steps;
CTFMetaData() noexcept = default;
CTFMetaData(const CTFMetaData &) = delete;
CTFMetaData(CTFMetaData &&) noexcept = default;
CTFMetaData &operator=(const CTFMetaData &) = delete;
CTFMetaData &operator=(CTFMetaData &&) noexcept = default;
std::unique_ptr<CTFMetaData> extract() {
return steps.empty()
? std::unique_ptr<CTFMetaData>(nullptr)
: std::make_unique<CTFMetaData>(std::move(*this));
}
~CTFMetaData();
};
struct CTFContext {
const ValueBuilderFactory &factory;
Stash &stash;
CTFMetaData *meta;
constexpr CTFContext(const CTFContext &) noexcept = default;
constexpr CTFContext(const ValueBuilderFactory &factory_in, Stash &stash_in, CTFMetaData *meta_in) noexcept
: factory(factory_in), stash(stash_in), meta(meta_in) {}
};
std::vector<InterpretedFunction::Instruction> compile_tensor_function(const TensorFunction &function, const CTFContext &ctx);
} // namespace vespalib::eval
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