Qiskit / qiskit-terra / 5649952308

86%

main: 87%

push

github

Fix final_layout when VF2PostLayout finds a better layout (#10466)

* Fix final_layout when VF2PostLayout finds a better layout

This commit fixes a bug in the preset pass managers when VF2PostLayout
is run and finds a better layout to use. In these cases the ApplyLayout
was updating the layout but we never updated the final layout to reflect
these changes. This would result in an incorrect final layout because
the input positions of the qubits were incorrect after re-applying the
layout. This commit fixes this by adding code to ApplyLayout to also
update final_layout, if one is set, to reflect the new initial layout
found by VF2PostLayout.

Fixes #10457

* Remove stray debug print

* Use a list instead of a dict

* Add assertion on vf2postlayout being used in compiler.transpile tests

* Actually assert a post layout is set

6 of 6 new or added lines in 1 file covered. (100.0%)

73055 of 85004 relevant lines covered (85.94%)

59722.06 hits per line