//   BC x,LT,...
			//   BC x,foo+2,...
			//   BC x,4
			//   BC x,$5
			// into
			//   BC x,CR0LT,...
			//   BC x,CR0EQ,...
			//   BC x,CR1LT,...
			//   BC x,CR1GT,...
			// The first and second cases demonstrate a symbol name which is
			// effectively discarded. In these cases, the offset determines
			// the CR bit.
			prog.Reg = a[1].Reg
			if a[1].Type != obj.TYPE_REG {