Upgrade to vllm 0.17.0 corex v4.1 overlay

vllm/kernels/helion/register.py

@@ -31,8 +31,8 @@ by key matches the config returned by the autotuner.
 
 Key Classes
 -----------
-- HelionKernelWrapper: Wraps raw kernel + config_picker, creates configured ops
-- ConfiguredHelionKernel: Platform-specific kernel registered as PyTorch custom op
+- HelionKernelWrapper: Wraps raw kernel + config_picker, creates configured kernels
+- ConfiguredHelionKernel: Platform-specific kernel with pre-tuned configs
 - PresetConfigSearch: Custom autotuner that returns pre-tuned configs
 """
 
@@ -53,10 +53,27 @@ if not has_helion():
     )
 
 import helion
+from helion._compat import requires_torch_version
 from helion.autotuner.base_search import BaseAutotuner
 from helion.runtime.config import Config
 from helion.runtime.settings import default_autotuner_fn
 
+# TODO(gmagogsfm): Remove CustomOp fallback path (_get_or_register_custom_op,
+# vllm_helion_lib, direct_register_custom_op) once vLLM requires PyTorch >= 2.11.
+_HOP_AVAILABLE = requires_torch_version("2.11")
+
+if _HOP_AVAILABLE:
+    import torch.utils._pytree as pytree
+    from helion._compiler._dynamo.higher_order_ops import (
+        helion_kernel_side_table,
+        helion_kernel_wrapper_mutation,
+    )
+    from helion._compiler._dynamo.variables import infer_output_spec
+    from torch.fx.experimental.proxy_tensor import (
+        disable_proxy_modes_tracing,
+        get_proxy_mode,
+    )
+
 logger = init_logger(__name__)
 
 vllm_helion_lib = Library("vllm_helion", "FRAGMENT")  # noqa
@@ -233,7 +250,7 @@ class ConfiguredHelionKernel:
 
 
 class HelionKernelWrapper:
-    """Wrapper for Helion kernels that creates config-specific PyTorch custom ops."""
+    """Wrapper for Helion kernels with pre-tuned config selection and HOP support."""
 
     def __init__(
         self,
@@ -252,11 +269,86 @@ class HelionKernelWrapper:
         self._config_picker: (
             Callable[[tuple[Any, ...], list[str]], str | None] | None
         ) = None
+        self._configured_kernel: ConfiguredHelionKernel | None = None
         self._input_generator: Callable[[], dict[str, tuple[Any, ...]]] | None = None
 
     def __call__(self, *args, **kwargs):
-        configured_op = self.get_configured_op()
-        return configured_op(*args, **kwargs)
+        # CustomOp fallback: register as torch custom op for torch.compile
+        # compatibility on older PyTorch lacking HOP/EffectType support
+        if not _HOP_AVAILABLE:
+            custom_op = self._get_or_register_custom_op()
+            return custom_op(*args, **kwargs)
+        # HOP tracing: record HigherOrderOp in the FX graph
+        if get_proxy_mode() is not None:
+            return self._call_via_hop(args, kwargs)
+        # Eager: run the configured kernel directly
+        return self.get_configured_op()(*args, **kwargs)
+
+    def _call_via_hop(
+        self,
+        args: tuple[Any, ...],
+        kwargs: dict[str, Any],
+    ) -> Any:
+        kernel = self.get_configured_op()._decorated_kernel
+        kernel_idx = helion_kernel_side_table.add_kernel(kernel)
+
+        constant_args, tensor_args = self._partition_args(kernel, args, kwargs)
+
+        all_named = {**constant_args, **tensor_args}
+        full_args = tuple(
+            all_named.get(n, p.default)
+            for n, p in kernel.signature.parameters.items()  # type: ignore[attr-defined]
+            if n in all_named or p.default is not p.empty
+        )
+
+        with disable_proxy_modes_tracing():
+            output_spec = infer_output_spec(kernel, full_args)
+
+        hop_result = helion_kernel_wrapper_mutation(
+            kernel_idx=kernel_idx,
+            constant_args=constant_args,
+            tensor_args=tensor_args,
+            output_spec=output_spec,
+        )
+
+        tree_spec_str = output_spec.get("tree_spec_str")
+        if tree_spec_str is None:
+            return None
+        tree_spec = pytree.treespec_loads(tree_spec_str)
+
+        hop_iter = iter(hop_result)
+        reconstructed = []
+        for spec in output_spec["leaf_specs"]:
+            is_constant_scalar = spec["type"] == "scalar" and not isinstance(
+                spec.get("scalar_value"), torch.SymInt
+            )
+            if is_constant_scalar:
+                reconstructed.append(spec["scalar_value"])
+            else:
+                reconstructed.append(next(hop_iter))
+        return pytree.tree_unflatten(reconstructed, tree_spec)
+
+    @staticmethod
+    def _partition_args(
+        kernel: Any,
+        args: tuple[Any, ...],
+        kwargs: dict[str, Any],
+    ) -> tuple[dict[str, Any], dict[str, Any]]:
+        constant_args: dict[str, Any] = {}
+        tensor_args: dict[str, Any] = {}
+        params = list(kernel.signature.parameters.keys())
+        for i, val in enumerate(args):
+            name = params[i]
+            if isinstance(val, torch.Tensor):
+                tensor_args[name] = val
+            else:
+                constant_args[name] = val
+        for name, val in kwargs.items():
+            if isinstance(val, torch.Tensor):
+                tensor_args[name] = val
+            else:
+                constant_args[name] = val
+        return constant_args, tensor_args
 
     def register_config_picker(
         self, picker_func: Callable[[tuple[Any, ...], list[str]], str | None]
@@ -309,29 +401,32 @@ class HelionKernelWrapper:
         )
         return autotune_kernel.autotune(inputs)
 
-    def get_configured_op(self) -> Any:
+    def get_configured_op(self) -> ConfiguredHelionKernel:
         assert self._config_picker is not None, (
             f"No config picker registered for kernel '{self.op_name}'. "
             f"Use @{self.op_name}.register_config_picker to register one."
         )
 
+        if self._configured_kernel is None:
+            self._configured_kernel = ConfiguredHelionKernel(
+                op_name=self.op_name,
+                config_picker=self._config_picker,
+                raw_kernel_func=self.raw_kernel_func,
+                helion_settings=self.helion_settings,
+            )
+
+        return self._configured_kernel
+
+    def _get_or_register_custom_op(self) -> Any:
         if hasattr(torch.ops.vllm_helion, self.op_name):
-            logger.debug("Op vllm_helion::%s already registered", self.op_name)
             return getattr(torch.ops.vllm_helion, self.op_name)
 
-        configured_kernel = ConfiguredHelionKernel(
-            op_name=self.op_name,
-            config_picker=self._config_picker,
-            raw_kernel_func=self.raw_kernel_func,
-            helion_settings=self.helion_settings,
-        )
+        configured_kernel = self.get_configured_op()
 
         logger.info("Registering op: vllm_helion::%s", self.op_name)
         direct_register_custom_op(
             op_name=self.op_name,
-            op_func=configured_kernel._decorated_kernel,  # Register decorated kernel
-            # TODO(gmagogsfm): Implement automatic mutation/aliasing detection
-            # for Helion kernels.
+            op_func=configured_kernel._decorated_kernel,
             mutates_args=None,
             fake_impl=self._fake_impl,
             target_lib=vllm_helion_lib,