Fixed result_record_output

[sharminafrose]

Ensure that the measurement results in the generated output align with the number of classical bits defined in the OpenQASM program.

Summary of changes

In qbraid_qir/qasm3/visitor.py file, the record_output method has been updated to loop over num_clbits instead of num_qubits. Previously, when the number of classical bits was lower than the number of qubits, the generated QIR had an incorrect output configuration.
Example Input: For the following OpenQASM program:

Issue:
The generated output QIR incorrectly included two calls to @__quantum__rt__result_record_output, attempting to record a non-existent measurement result:

By adjusting the loop to iterate over num_clbits, the generated QIR now correctly matches the number of classical bits, preventing unnecessary or erroneous result recordings.

[TheGupta2012]

Thanks for the contribution @sharminafrose ! When we initially developed the record_output function it was analogous to a method which measures all of the qubits in the quantum program.

• While your change takes care of one particular case, I believe the correct way to do this would be to make a call to the @__quantum__rt__result_record_output respective to each measurement.
• This is because, say if num_clbits would be larger than num_qubits OR num measurements are != num_clbits, the calls to record output would not match the actual measurements.