Add commutative cancellation to preset passmanagers level 2 and 3 (#1…

…1929) * added commutative cancellation to preset passmanagers * exclude annotated and initialize from commutation checker * Update commutation_checker.py * Update releasenotes/notes/commutative-cancellation-preset-passmanager-c137ce516a10eae5.yaml Co-authored-by: Matthew Treinish <mtreinish@kortar.org> * Update releasenotes/notes/commutative-cancellation-preset-passmanager-c137ce516a10eae5.yaml --------- Co-authored-by: Matthew Treinish <mtreinish@kortar.org>
Qiskit · Mar 20, 2024 · dd2570b · dd2570b
1 parent b7fcc76
commit dd2570b
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diff --git a/qiskit/transpiler/preset_passmanagers/builtin_plugins.py b/qiskit/transpiler/preset_passmanagers/builtin_plugins.py
@@ -123,6 +123,8 @@ def pass_manager(self, pass_manager_config, optimization_level=None) -> PassMana
                     ]
                 )
             )
+            if optimization_level == 2:
+                init.append(CommutativeCancellation())
 
         elif optimization_level == 3:
             init = common.generate_unroll_3q(
@@ -153,6 +155,7 @@ def pass_manager(self, pass_manager_config, optimization_level=None) -> PassMana
                     ]
                 )
             )
+            init.append(CommutativeCancellation())
 
         else:
             return TranspilerError(f"Invalid optimization level {optimization_level}")

diff --git a/releasenotes/notes/commutative-cancellation-preset-passmanager-c137ce516a10eae5.yaml b/releasenotes/notes/commutative-cancellation-preset-passmanager-c137ce516a10eae5.yaml
@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    Added the :class:`.CommutativeCancellation` pass to the ``init`` stage of the preset pass managers for
+    optimization levels 2 and 3. This enables the preset pass managers to cancel additional logical
+    operations at the beginning of the compilation pipeline.
+