You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: control_flow.rs
    path of file: ./repos/oxc/crates/oxc_semantic/src
    
    the code of the file until where you have to start completion: use oxc_span::CompactStr;
use oxc_syntax::operator::{
    AssignmentOperator, BinaryOperator, LogicalOperator, UnaryOperator, UpdateOperator,
};
use petgraph::{stable_graph::NodeIndex, Graph};

use crate::AstNodeId;

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum Register {
    Index(u32),
    Return,
}

#[derive(Debug, Clone)]
pub enum ObjectPropertyAccessBy {
    PrivateProperty(CompactStr),
    Property(CompactStr),
    Expression(Register),
}

#[derive(Debug, Clone)]
pub struct
    
    pub fn put_x_in_register(&mut self, asmt_value: AssignmentValue) {
        let register = self.use_this_register.take().unwrap_or_else(|| self.new_register());

        let basic_block_element = BasicBlockElement::Assignment(register, asmt_value);

        if self.should_save_stores_for_patching {
            let saved_store = &mut self.saved_stores[self.saved_store.expect(
                "there must be at least one saved store if should_save_stores_for_patching is true",
            )];

            saved_store.0.push(basic_block_element);
            saved_store.1 = Some(register);
        } else {
            self.current_basic_block().push(basic_block_element);
        }
        // used for storing the object base for MemberExpressions
        if let Some(arr) = self.store_assignments_into_this_array.last_mut() {
            arr.push(register);
        }

        if let Some(arr) = self.store_final_assignments_into_this_array.last_mut() {
            arr.push(register);
        }
    }