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: value_and_place.rs
    path of file: ./repos/rustc_codegen_cranelift/src
    
    the code of the file until where you have to start completion: //! Definition of [`CValue`] and [`CPlace`]

use cranelift_codegen::entity::EntityRef;
use cranelift_codegen::ir::immediates::Offset32;
use rustc_middle::ty::FnSig;

use crate::prelude::*;

fn codegen_field<'tcx>(
    fx: &mut FunctionCx<'_, '_
    
    pub(crate) fn to_cvalue(self, fx: &mut FunctionCx<'_, '_, 'tcx>) -> CValue<'tcx> {
        let layout = self.layout();
        match self.inner {
            CPlaceInner::Var(_local, var) => {
                let val = fx.bcx.use_var(var);
                //fx.bcx.set_val_label(val, cranelift_codegen::ir::ValueLabel::new(var.index()));
                CValue::by_val(val, layout)
            }
            CPlaceInner::VarPair(_local, var1, var2) => {
                let val1 = fx.bcx.use_var(var1);
                //fx.bcx.set_val_label(val1, cranelift_codegen::ir::ValueLabel::new(var1.index()));
                let val2 = fx.bcx.use_var(var2);
                //fx.bcx.set_val_label(val2, cranelift_codegen::ir::ValueLabel::new(var2.index()));
                CValue::by_val_pair(val1, val2, layout)
            }
            CPlaceInner::Addr(ptr, extra) => {
                if let Some(extra) = extra {
                    CValue::by_ref_unsized(ptr, extra, layout)
                } else {
                    CValue::by_ref(ptr, layout)
                }
            }
        }
    }