Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Signed-off-by: Alex McCaskey <mccaskeyaj@ornl.gov>

Signed-off-by: Alex McCaskey <mccaskeyaj@ornl.gov>

As a result of XACC IR being serialized, it's possible to have gates
follow Measure instructions without the circuit truly having
post-measure gates. For example:

    H 0
    Measure 0
    H 1
    Measure 1

In cases like that, the current QppAccelerator decides it cannot
simulate the circuit once and repeatedly sample the resulting state
vector to simulate "runs." That is an overzealous judgment, since none
of the gates that follow the Measure instructions actually depend on the
results of measurements.

So instead, in the QppAccelerator logic detecting post-measurement
gates, track which qubits have been measured, and only report
post-measurement gates if it sees a gate operating on a qubit with an
earlier Measure instruction.

Signed-off-by: Austin Adams <aja@gatech.edu>

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Signed-off-by: Alex McCaskey <mccaskeyaj@ornl.gov>

Signed-off-by: Alex McCaskey <mccaskeyaj@ornl.gov>

Signed-off-by: Alex McCaskey <mccaskeyaj@ornl.gov>

Signed-off-by: Alex McCaskey <mccaskeyaj@ornl.gov>

Signed-off-by: Alex McCaskey <mccaskeyaj@ornl.gov>

Note: Aer can simulate conditional (bfunc) in the QObj and XACC translate IfStmt to bfunc appropriately.
Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Testing non-conventional gate set.

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

The procedure was not properly taking into account non-IBM gateset, i.e., 2-q gates may not be CNOT.

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Remove SWAP gates from the two-qubit gate whitelist for Staq placement
also modified in f1eedf04. Otherwise, Swap instructions between
non-adjacent qubits can slip through the swap-shortest-path
IRTransformation. An example of this would be the QCOR qft() routine,
which can generate a Swap between far-away qubits at the end.

Combined with f1eedf04

, fixes ORNL-QCI/qcor#199.

Signed-off-by: Austin Adams <aja@gatech.edu>

Creg can be larger than qreg (e.g., IQPE) and need to handle explicit Measure assignment.

Tested by: validating with Honeywell APIVAL

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

XACCToStaqOpenQASM visitor to handle IfStmt (currently empty impl)

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Handle single-cbit conditional for OpenQASM code gen.

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Signed-off-by: Alex McCaskey <mccaskeyaj@ornl.gov>

In the IBM backend, we require [x, y] to exist in the coupling map to
execute CX x,y -- [y, x] in the coupling map is not enough. So when IBM
does not include a coupling_map for a given backend, we need to include
both [i,j] and [j,i] for all qubits i,j s.t. i != j in the coupling map
we create; currently, we only include [i,j] for all qubits i,j with i <
j, which will cause errors if a circuit includes CX j,i.

Signed-off-by: Austin Adams <aja@gatech.edu>

This is problematic when there is a U3 gate: it will create a Ry with string param, then revisit.

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Fix bug where IBM remote simulators not added to available backends. Configure IonQ backend to retrieve backend connectivity

Signed-off-by: Alex McCaskey <mccaskeyaj@ornl.gov>

Also, fixed a compile issue w/ Clang.

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Signed-off-by: Alex McCaskey <mccaskeyaj@ornl.gov>

Signed-off-by: Alex McCaskey <mccaskeyaj@ornl.gov>

Signed-off-by: Alex McCaskey <mccaskeyaj@ornl.gov>

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Note: need to figure out how to deal w/ gradients in this case.
Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Signed-off-by: Thien Nguyen <nguyentm@ornl.gov>

Improvement of the log, minor renaming and clarification of handling of negative job limit parameter.

Signed-off-by: Quantum Brilliance [Simon Yin, Senior Software Engineer] <simon.y@quantum-brilliance.com>