# isort: skip_file
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# 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,
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# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
# pylint: disable=redefined-builtin, wildcard-import
"""TVM: Open Deep Learning Compiler Stack."""

import multiprocessing
import sys
import os

# ffi module must load first
from tvm_ffi import register_object, register_global_func, get_global_func

# top-level alias
from .libinfo import __version__
from .base import _RUNTIME_ONLY

# tvm.runtime
from .runtime import Object
from .runtime._tensor import device, device_from_target, cpu, cuda, opencl, vulkan, metal
from .runtime._tensor import vpi, rocm, ext_dev, hexagon
from .runtime import DataType, DataTypeCode

# tvm.error
from . import error

# tvm.ir
from .ir import IRModule
from .ir import transform
from .ir import instrument
from . import ir

# tvm.script — must be imported before any dialect package so that
# tvm.script.register_dialect is reachable when dialect __init__.py files run.
from . import script

# tvm.tirx — registers itself via tvm.script.register_dialect in its __init__
from . import tirx

# tvm.backend — owns backend Python load hooks
from . import backend

# tvm.target
from . import target

# tvm.te
from . import te

# tvm.driver
from .driver import build, compile

# others
from . import arith

# support infra
from . import support

# Side-effect imports: register CUDA/ROCm FFI callbacks at TVM startup
from .support import rocm as _rocm, nvcc as _nvcc

# Relax contain modules that are only available in compiler package
# Do not import them if TVM is built with runtime only
if not _RUNTIME_ONLY:
    # tvm.relax — registers itself via tvm.script.register_dialect in its __init__
    from . import relax

# NOTE: This file should be python2 compatible so we can
# raise proper error message when user run the package using
# an older version of the python


def _should_print_backtrace():
    in_pytest = "PYTEST_CURRENT_TEST" in os.environ
    tvm_backtrace = os.environ.get("TVM_BACKTRACE", "0")

    try:
        tvm_backtrace = bool(int(tvm_backtrace))
    except ValueError:
        raise ValueError(f"invalid value for TVM_BACKTRACE {tvm_backtrace}, please set to 0 or 1.")

    return in_pytest or tvm_backtrace


def tvm_wrap_excepthook(exception_hook):
    """Wrap given excepthook with TVM additional work."""

    def wrapper(exctype, value, trbk):
        """Clean subprocesses when TVM is interrupted."""
        if exctype is error.DiagnosticError and not _should_print_backtrace():
            # TODO(@jroesch): consider moving to C++?
            print("note: run with `TVM_BACKTRACE=1` environment variable to display a backtrace.")
        else:
            exception_hook(exctype, value, trbk)

        if hasattr(multiprocessing, "active_children"):
            # pylint: disable=not-callable
            for p in multiprocessing.active_children():
                p.terminate()

    return wrapper


sys.excepthook = tvm_wrap_excepthook(sys.excepthook)

# Autoload loads built-in and out-of-tree backends. Out-of-tree extensions opt
# into being loaded automatically at ``import tvm`` time by declaring an entry
# point in the ``tvm.backends`` group:
# [project.entry-points."tvm.backends"] tvm_foo = "tvm_foo:_autoload".
# Autoload can be disabled via ``TVM_DEVICE_BACKEND_AUTOLOAD=0``.
from .backend._autoload_backends import _autoload_backends

_autoload_backends()
