{"ast_node_type":"variable","tokens":[{"end":67,"kind":"keyword","start":0,"text":"let"}]}
            let llty = bx.cx().immediate_backend_type(self.layout);
        if let OperandValue::Pair(a, b) = self.val {
            debug!("Operand::immediate_or_packed_pair: packing {:?} into {:?}", self, llty);