\brief Insert a PTRSUB with offset 0 that accesses a field of the given data-type The data-type can be a structure, in which case the field at offset zero is being accessed. The data-type can reference a union, in which case a specific field is being accessed as indicated by Funcdata::getUnionField. The PTRSUB is inserted right before the given PcodeOp. The indicated input Varnode becomes the P
source not stored for this graph (policy: none)
nothing calls this directly
no test coverage detected