[torch.compile] Reorganize vllm/compilation and tests/compile (0/N for vLLM IR) (#33731)

Signed-off-by: Luka Govedič <lgovedic@redhat.com>
Signed-off-by: ProExpertProg <luka.govedic@gmail.com>
Signed-off-by: Luka Govedič <ProExpertProg@users.noreply.github.com>

tests/compile/passes/test_pass_manager.py

@@ -0,0 +1,83 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+import copy
+
+import pytest
+import torch
+
+from vllm.compilation.passes.inductor_pass import (
+    CallableInductorPass,
+    InductorPass,
+    pass_context,
+)
+from vllm.compilation.passes.pass_manager import PostGradPassManager
+from vllm.config import ModelConfig, VllmConfig
+from vllm.config.utils import Range
+
+
+# dummy custom pass that doesn't inherit
+def simple_callable(graph: torch.fx.Graph):
+    pass
+
+
+# Should fail to add directly to the pass manager
+def test_bad_callable():
+    config = VllmConfig()
+
+    pass_manager = PostGradPassManager()
+    pass_manager.configure(config)
+
+    with pytest.raises(AssertionError):
+        pass_manager.add(simple_callable)  # type: ignore[arg-type]
+
+
+# Pass that inherits from InductorPass
+class ProperPass(InductorPass):
+    def __call__(self, graph: torch.fx.graph.Graph) -> None:
+        pass
+
+
+@pytest.mark.parametrize(
+    "callable",
+    [
+        ProperPass(),
+        # Can also wrap callables in CallableInductorPass for compliance
+        CallableInductorPass(simple_callable),
+        CallableInductorPass(simple_callable, InductorPass.hash_source(__file__)),
+    ],
+)
+def test_pass_manager_uuid(callable):
+    # Set the pass context as PassManager uuid uses it
+    with pass_context(Range(start=1, end=8)):
+        # Some passes need dtype to be set
+        config = VllmConfig(model_config=ModelConfig(dtype=torch.bfloat16))
+
+        pass_manager = PostGradPassManager()
+        pass_manager.configure(config)
+
+        # Check that UUID is different if the same pass is added 2x
+        pass_manager.add(callable)
+        uuid1 = pass_manager.uuid()
+        pass_manager.add(callable)
+        uuid2 = pass_manager.uuid()
+        assert uuid1 != uuid2
+
+        # UUID should be the same as the original one,
+        # as we constructed in the same way.
+        pass_manager2 = PostGradPassManager()
+        pass_manager2.configure(config)
+        pass_manager2.add(callable)
+        assert uuid1 == pass_manager2.uuid()
+
+        # UUID should be different due to config change
+        config2 = copy.deepcopy(config)
+        config2.compilation_config.pass_config.fuse_norm_quant = (
+            not config2.compilation_config.pass_config.fuse_norm_quant
+        )
+        config2.compilation_config.pass_config.fuse_act_quant = (
+            not config2.compilation_config.pass_config.fuse_act_quant
+        )
+        pass_manager3 = PostGradPassManager()
+        pass_manager3.configure(config2)
+        pass_manager3.add(callable)
+        assert uuid1 != pass_manager3.uuid()