Propagate DAGCircuit.name in ApplyLayout
#13910
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This has always been absent, but `transpile` masked the problem by assigning the output circuit names by overwriting the `output_names` input kwarg if it wasn't set. `generate_preset_pass_manager` didn't have the same logic, so it was observable that `ApplyLayout` didn't propagate the name. We could have added similar name-propagation logic to `generate_preset_pass_manager`, but really the bug is in `ApplyLayout`; passes _should_ propagate the metadata.
jakelishman
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stable backport potential
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This has always been absent, but
transpilemasked the problem by assigning the output circuit names by overwriting theoutput_namesinput kwarg if it wasn't set.generate_preset_pass_managerdidn't have the same logic, so it was observable thatApplyLayoutdidn't propagate the name.We could have added similar name-propagation logic to
generate_preset_pass_manager, but really the bug is inApplyLayout; passes should propagate the metadata.Summary
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