Simplify controlled gate for SumOfProducts #5873
Merged
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Simplify the
SumOfProducts
control value when possible (if there's only a single product in it) when constructing aControlledGate
. This allows theX.controlled() -> CX
optimization when using aSumOfProducts
control value.Add a two-step test to check
X.controlled(num_qubits=2) -> CCX
optimization, and include SumOfProducts check there too.Make use of this simplification where we were hacking it in previously.
Fixes #5883