| 1 | # SPDX-License-Identifier: Apache-2.0 |
| 2 | # SPDX-FileCopyrightText: Copyright contributors to the vLLM project |
| 3 | from torch import fx |
| 4 | from torch._ops import OpOverload, OpOverloadPacket |
| 5 | |
| 6 | from vllm.ir.op import IrOp |
| 7 | from vllm.logger import init_logger |
| 8 | |
| 9 | logger = init_logger(__name__) |
| 10 | |
| 11 | |
| 12 | def overload_or_default(op: OpOverload | OpOverloadPacket) -> OpOverload: |
| 13 | if isinstance(op, OpOverloadPacket): |
| 14 | return op.default |
| 15 | assert isinstance(op, OpOverload), "Expected an OpOverload or OpOverloadPacket" |
| 16 | return op |
| 17 | |
| 18 | |
| 19 | def get_ir_op(node: fx.Node) -> IrOp | None: |
| 20 | if node.op != "call_function": |
| 21 | return None |
| 22 | |
| 23 | if not isinstance(node.target, (OpOverload, OpOverloadPacket)): |
| 24 | return None |
| 25 | |
| 26 | op_overload = overload_or_default(node.target) |
| 27 | if op_overload.namespace != "vllm_ir": |
| 28 | return None |
| 29 | |
| 30 | op_name = op_overload._opname |
| 31 | if op_name not in IrOp.registry: |
| 32 | logger.warning( |
| 33 | "Unknown vLLM IR op %s, there's likely an issue with torch registration, " |
| 34 | "or a torch custom op was registered in the vllm_ir namespace by mistake.", |
| 35 | op_name, |
| 36 | ) |
| 37 | return None |
| 38 | |
| 39 | ir_op = IrOp.registry[op_name] |
| 40 | return ir_op |