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# to you 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
#
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"""Hexagon-owned backend hooks."""

from importlib import import_module
from pathlib import Path

from tvm_ffi.libinfo import load_lib_ctypes

from tvm.base import _LOADED_LIBS

_LAZY_SUBMODULES = {"target_tags"}


def register_backend():
    """Register Hexagon-owned Python semantics."""
    runtime_dir = Path(_LOADED_LIBS["tvm_runtime"]._name).resolve().parent
    try:
        # Runtime sidecars only need registration side effects; libtvm_runtime is global.
        _LOADED_LIBS["tvm_runtime_hexagon"] = load_lib_ctypes(
            package="tvm",
            target_name="tvm_runtime_hexagon",
            extra_lib_paths=[runtime_dir],
            mode="RTLD_LOCAL",
        )
    except (OSError, FileNotFoundError, RuntimeError):
        pass
    import_module(f"{__name__}.target_tags")


def __getattr__(name: str):
    if name in _LAZY_SUBMODULES:
        return import_module(f"{__name__}.{name}")
    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")


__all__ = ["register_backend", "target_tags"]
