Allow assignments of the form A = A to be created.  Don't create entries in copy propagation for these so you don't get infinite loops.
Allow assignments of the form A = A to be created.  Don't create entries in copy propagation for these so you don't get infinite loops.

gmarkall/numba,stonebig/numba,gmarkall/numba,sklam/numba,numba/numba,seibert/numba,sklam/numba,cpcloud/numba,seibert/numba,cpcloud/numba,stonebig/numba,IntelLabs/numba,numba/numba,IntelLabs/numba,seibert/numba,stonebig/numba,gmarkall/numba,stuartarchibald/numba,cpcloud/numba,numba/numba,stuartarchibald/numba,sklam/numba,gmarkall/numba,stuartarchibald/numba,numba/numba,seibert/numba,numba/numba,stonebig/numba,gmarkall/numba,stuartarchibald/numba,stonebig/numba,cpcloud/numba,IntelLabs/numba,cpcloud/numba,IntelLabs/numba,sklam/numba,seibert/numba,IntelLabs/numba,sklam/numba,stuartarchibald/numba