Miscellaneous fixes to the unified compiler

.dep-versions

@@ -10,7 +10,7 @@ enzyme=v0.0.203
 
 # For a custom PL version, update the package version here and at
 # 'doc/requirements.txt'
-pennylane=0.44.0-dev44
+pennylane=0.44.0-dev48
 
 # For a custom LQ/LK version, update the package version here and at
 # 'doc/requirements.txt'

frontend/test/pytest/python_interface/dialects/test_quantum_dialect.py

@@ -13,7 +13,6 @@
 # limitations under the License.
 
 """Unit tests for the xDSL Quantum dialect."""
-
 import pytest
 
 # pylint: disable=wrong-import-position
@@ -30,7 +29,7 @@
     i1,
 )
 from xdsl.dialects.test import TestOp
-from xdsl.ir import AttributeCovT, OpResult
+from xdsl.ir import AttributeCovT, Block, Operation, OpResult, Region
 
 from catalyst.python_interface.dialects import Quantum
 from catalyst.python_interface.dialects.quantum import (
@@ -115,7 +114,10 @@ def create_ssa_value(t: AttributeCovT) -> OpResult[AttributeCovT]:
 state = create_ssa_value(TensorType(ComplexType(Float64Type()), shape=(16,)))
 
 expected_ops_init_kwargs = {
-    "AdjointOp": {"qreg": qreg, "region": (CustomOp(gate_name="CNOT", in_qubits=(q0, q1)),)},
+    "AdjointOp": {
+        "qreg": qreg,
+        "region": Region(Block((CustomOp(gate_name="CNOT", in_qubits=(q0, q1)),))),
+    },
     "AllocOp": {"nqubits": 3},
     "AllocQubitOp": {},
     "ComputationalBasisOp": {"operands": (q0, None), "result_types": (obs,)},
@@ -203,7 +205,10 @@ def test_only_existing_operations_are_expected():
 @pytest.mark.parametrize("op", all_ops)
 def test_operation_construction(op):
     """Test the constructors of operations in the Quantum dialect."""
-    kwargs = expected_ops_init_kwargs[op.__name__]
+    kwargs = {
+        k: v.clone() if isinstance(v, (Operation, Region)) else v
+        for k, v in expected_ops_init_kwargs[op.__name__].items()
+    }
     _ = op(**kwargs)
 
 

frontend/test/pytest/python_interface/inspection/test_mlir_graph.py

@@ -14,6 +14,7 @@
 """Unit test module for the MLIR graph generation in the Unified Compiler visualization module."""
 
 from pathlib import Path
+from subprocess import run
 
 import pytest
 
@@ -22,6 +23,10 @@
 xdsl = pytest.importorskip("xdsl")
 graphviz = pytest.importorskip("graphviz")
 
+if run(["which", "dot"], check=False).returncode != 0:
+    pytest.skip(reason="Graphviz isn't installed.")
+
+
 import pennylane as qml
 
 from catalyst.passes.xdsl_plugin import getXDSLPluginAbsolutePath