{"ast_node_type":"variable","tokens":[{"end":83,"kind":"keyword","start":0,"text":"let"}]}
                let lsb = fx.bcx.ins().iconst(types::I64, const_val as u64 as i64);
                let const_val = const_val.to_bits(layout.size);
                let msb = fx.bcx.ins().iconst(types::I64, (const_val >> 64) as u64 as i64);