Fix handling of control flow instructions in convert_to_target() #11922
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This commit fixes an issue in the convert_to_target() function where it wasn't looking for control flow instructions in the proper location. Typically the control flow instructions are put in the supported_instructions field of the BackendConfiguration, but the convert_to_target() function was ignoring this field. This commit updates the function to check supported_instructions for the control flow instructions. It doesn't more broadly look at the supported_instructions field, because on other backends this field is used to list the supported pulse instructions which might have name conflicts with other instructions and cause issues building a target. This is the spiritual backport of Qiskit#11877, but because the state of the convert_to_target() function on stable/0.46 is very different very little code is carried over from the version on main and stable/1.0, basically only the tests. This is actually closer in implementation to the equivalent PR on qiskit-ibm-runtime: Qiskit/qiskit-ibm-runtime#1443 as the internal conversion function in that repository is very similar to the function on the stable/0.46 branch.
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jakelishman
approved these changes
Feb 29, 2024
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Summary
This commit fixes an issue in the convert_to_target() function where it wasn't looking for control flow instructions in the proper location. Typically the control flow instructions are put in the supported_instructions field of the BackendConfiguration, but the convert_to_target() function was ignoring this field. This commit updates the function to check supported_instructions for the control flow instructions. It doesn't more broadly look at the supported_instructions field, because on other backends this field is used to list the supported pulse instructions which might have name conflicts with other instructions and cause issues building a target.
This is the spiritual backport of #11877, but because the state of the convert_to_target() function on stable/0.46 is very different very little code is carried over from the version on main and stable/1.0, basically only the tests. This is actually closer in implementation to the equivalent PR on qiskit-ibm-runtime: Qiskit/qiskit-ibm-runtime#1443 as the internal conversion function in that repository is very similar to the function on the stable/0.46 branch.
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