Commits on Aug 1, 2024

1. 'Peephole' optimization - or: collecting and optimizing two-qubit blo… …

   …cks - before routing (#12727)
   
   * init
   
   * up
   
   * up
   
   * Update builtin_plugins.py
   
   * Update builtin_plugins.py
   
   * reno
   
   * Update builtin_plugins.py
   
   * Update builtin_plugins.py
   
   * Update peephole-before-routing-c3d184b740bb7a8b.yaml
   
   * neko check
   
   * check neko
   
   * Update builtin_plugins.py
   
   * test neko
   
   * Update builtin_plugins.py
   
   * Update builtin_plugins.py
   
   * Update builtin_plugins.py
   
   * lint
   
   * tests and format
   
   * remove FakeTorino test
   
   * Update peephole-before-routing-c3d184b740bb7a8b.yaml
   
   * Apply suggestions from code review
   
   Co-authored-by: Matthew Treinish <[email protected]>
   
   * comments from code review
   
   * fix precision
   
   * up
   
   * up
   
   * update
   
   * up
   
   * .
   
   * cyclic import
   
   * cycl import
   
   * cyl import
   
   * .
   
   * circular import
   
   * .
   
   * lint
   
   * Include new pass in docs
   
   * Fix Split2QUnitaries dag manipulation
   
   This commit fixes the dag handling to do the 1q unitary insertion.
   Previously the dag manipulation was being done manually using the
   insert_node_on_in_edges() rustworkx method. However as the original node
   had 2 incoming edges for each qubit this caused the dag after running
   the pass to become corrupted. Each of the new 1q unitary nodes would end
   up with 2 incident edges and they would be in a sequence. This would result
   in later passes not being able to correctly understand the state of the
   circuit correctly. This was causing the unit tests to fail. This commit
   fixes this by just using `substitute_node_with_dag()` to handle the
   node substition, while doing it manually to avoid the overhead of
   checking is probably possible, the case where a unitary is the product
   of two 1q gates is not very common so optimizing it isn't super
   critical.
   
   * Update releasenotes/notes/peephole-before-routing-c3d184b740bb7a8b.yaml
   
   * stricter check for doing split2q
   
   * Update qiskit/transpiler/preset_passmanagers/builtin_plugins.py
   
   Co-authored-by: Matthew Treinish <[email protected]>
   
   * code review
   
   * Update qiskit/transpiler/passes/optimization/split_2q_unitaries.py
   
   Co-authored-by: Matthew Treinish <[email protected]>
   
   * new tests
   
   * typo
   
   * lint
   
   * lint
   
   ---------
   
   Co-authored-by: Matthew Treinish <[email protected]>
   (cherry picked from commit 1214d51)

   

   sbrandhsn authored and mergify[bot] committed Aug 1, 2024
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