code: def cbranch(self, cond, truebr, falsebr):
          
          br = instructions.ConditionalBranch(self.block, "br",
                                              [cond, truebr, falsebr])
          self._set_terminator(br)
          return br
docs: Conditional branch to *truebr* if *cond* is true, else to *falsebr*.