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Avoid operator creation in transpiler (backport #12826) #12875

Merged
merged 1 commit into from
Jul 31, 2024
Merged

Avoid operator creation in transpiler (backport #12826) #12875

merged 1 commit into from
Jul 31, 2024
+241 −112

Commits on Jul 31, 2024

  1. Avoid operator creation in transpiler (#12826) 

    * Avoid operator creation in transpiler

This removes very nearly all of the use of `DAGOpNode.op` in the default
transpiler paths.  The sole exception is in `InverseCancellation`, which
currently would involve some quite awkward gymnastics for little
near-term benefit. The pass should move fully to Rust soon, making it
not worth the effort.

Most of the tricks here involve using the knowledge that most operations
will involve only Rust-space standard gates, and that these cannot be
control-flow operations.

* Fix `HighLevelSynthesis` fast path

---------

Co-authored-by: Matthew Treinish <[email protected]>
(cherry picked from commit 0afb06e)
    @jakelishman @mergify
    jakelishman authored and mergify[bot] committed Jul 31, 2024
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