qiskit/releasenotes/notes/2.0/improve-hls-pass-620389dde2...

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---
features_transpiler:
- |
The :class:`.HighLevelSynthesis` transpiler pass now synthesizes
objects of type :class:`~.AnnotatedOperation` via the
plugin interface.
upgrade_transpiler:
- |
In the case that neither a target nor a set of basis gates are specified,
the :class:`.HighLevelSynthesis` transpiler pass synthesizes circuits with
annotated operations with fewer layers of wrappings than before (this happens,
for instance, for the circuit produced by :func:`.multiplier_cumulative_h18`).