case 4:
			f, _ := constant.Float32Val(v)
			return math.IsInf(float64(f), 0)
		case 8:
			f, _ := constant.Float64Val(v)
			return math.IsInf(f, 0)
		}
	case t.IsComplex():
		ft := types.FloatForComplex(t)
		return ConstOverflow(constant.Real(v), ft) || ConstOverflow(constant.Imag(v), ft)
	}
	base.Fatalf("ConstOverflow: %v, %v", v, t)
	panic("unreachable")
}