Qiskit / qiskit / 10635763010

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Commit Message

Fully port Optimize1qGatesDecomposition to Rust (#12959)

* Fully port Optimize1qGatesDecomposition to Rust

This commit builds off of #12550 and the other data model in Rust
infrastructure and migrates the Optimize1qGatesDecomposition pass to
operate fully in Rust. The full path of the transpiler pass now never
leaves rust until it has finished modifying the DAGCircuit. There is
still some python interaction necessary to handle parts of the data
model that are still in Python, mainly calibrations and parameter
expressions (for global phase). But otherwise the entirety of the pass
operates in rust now.

This is just a first pass at the migration here, it moves the pass to be
a single for loop in rust. The next steps here are to look at operating
the pass in parallel. There is no data dependency between the
optimizations being done by the pass so we should be able to the
throughput of the pass by leveraging multithreading to handle each run
in parallel. This commit does not attempt this though, because of the
Python dependency and also the data structures around gates and the
dag aren't really setup for multithreading yet and there likely will
need to be some work to support that (this pass is a good candidate to
work through the bugs on that).

Part of #12208

* Tweak control_flow_op_nodes() method to avoid dag traversal when not necessary

* Store target basis set without heap allocation

Since we only are storing 12 enum fields (which are a single byte) using
any heap allocated collection is completely overkill and will have more
overhead that storing a statically sized array for all 12 variants. This
commit adds a new struct that wraps a `[bool; 12]` to track which
basis are supported and an API for tracking this. This simplifies the
tracking of which qubit supports which EulerBasis, it also means other
internal users of the 1q decomposition have a simplified API for working
with the euler basis.

* Remove From trait for Qubit->PhysicalQubit conver... (continued)

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