Fix final_layout when VF2PostLayout finds a better layout (backport #10466) #10493
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* 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 (cherry picked from commit 42a0ee8)
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mtreinish
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Jul 24, 2023
mtreinish
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Changelog: Bugfix
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This is an automatic backport of pull request #10466 done by Mergify.
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