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#pragma once
#include <ostream>
#include <vector>
#include <c10/core/Scalar.h>
#include <torch/csrc/jit/passes/symbolic_shape_analysis.h>
#include <torch/csrc/lazy/core/hash.h>
TORCH_DECLARE_bool(ltc_enable_symbolic_shapes);
namespace torch::lazy {
class TORCH_API Shape {
public:
Shape() = default;
Shape(
at::ScalarType scalar_type,
c10::ArrayRef<int64_t> sizes,
std::optional<std::vector<bool>> is_symbolic = std::nullopt);
std::string to_string() const;
c10::ScalarType scalar_type() const {
return scalar_type_;
}
void set_scalar_type(at::ScalarType value) {
scalar_type_ = value;
}
int64_t dim() const {
return static_cast<int64_t>(sizes_.size());
}
c10::ArrayRef<int64_t> sizes() const {
return sizes_;
}
int64_t size(int64_t dim) const {
return sizes_.at(dim);
}
void set_size(int64_t dim, int64_t size) {
sizes_.at(dim) = size;
}
const std::optional<std::vector<bool>>& is_symbolic() const {
return is_symbolic_;
}
// Makes a copy with symbolic dims applied
Shape with_symbolic_dims(
std::optional<std::vector<bool>> symbolic_dims) const;
size_t numel() const;
hash_t hash(bool bakeInSizes) const;
bool operator==(const Shape& other) const;
private:
c10::ScalarType scalar_type_{c10::ScalarType::Undefined};
// Sizes are the upper bound sizes for a tensor, used by XLA.
std::vector<int64_t> sizes_;
// Stores which dimmensions are symbolic
// If nullopt, either it hasn't been initialized or the symbolic
// dimmensions are not calculatable
std::optional<std::vector<bool>> is_symbolic_ = std::nullopt;
};
TORCH_API std::ostream& operator<<(std::ostream& out, const Shape& shape);
TORCH_API bool symbolicShapeEnabled();
// Calculate and applies symbolic shapes onto the
// Shape objects passed to result_shapes
TORCH_API void applySymbolicShapesOnLT(
const char* schema_str,
std::vector<c10::IValue> args,
std::vector<Shape>& result_shapes);
} // namespace torch::lazy
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