Base class for computational nodes in the dataflow graph. More...

#include "sdfg/data_flow/data_flow_node.h"
#include "sdfg/graph/graph.h"
#include "sdfg/types/scalar.h"

Classes
class	sdfg::data_flow::CodeNode
	Base class for computational nodes with inputs and outputs. More...

Namespaces
namespace	sdfg
namespace	sdfg::builder
namespace	sdfg::data_flow

Detailed Description

Base class for computational nodes in the dataflow graph.

Code nodes represent computational operations in the SDFG dataflow graph. They are abstract nodes that have inputs and outputs connected via memlets. Code nodes include tasklets (simple operations) and library nodes (complex operations).

Key Concepts

Code Node

A CodeNode is the base class for all computational nodes. It defines:

Input connectors: Named inputs that receive data via memlets
Output connectors: Named outputs that send data via memlets
Connection interface for memlets

Input/Output Connectors

Connectors are named strings that identify specific inputs and outputs. For example, a binary operation might have inputs "_in1" and "_in2" and output "_out". Memlets connect access nodes to these connectors.

Derived Classes

Tasklet: Simple operations like addition, multiplication, assignment
LibraryNode: Complex operations like BLAS calls, reductions, custom functions

Example Usage

Creating a code node (via Tasklet):

// Create a binary addition tasklet
auto& tasklet = builder.add_tasklet(
    state,
    TaskletCode::fp_add,
    "_out",              // output connector
    {"_in1", "_in2"}     // input connectors
);
 
// Connect inputs and output
builder.add_computational_memlet(state, a_node, tasklet, "_in1", {});
builder.add_computational_memlet(state, b_node, tasklet, "_in2", {});
builder.add_computational_memlet(state, tasklet, "_out", result_node, {});

Accessing inputs and outputs:

const auto& inputs = tasklet.inputs();   // Get all input connector names
const auto& outputs = tasklet.outputs(); // Get all output connector names
std::string first_input = tasklet.input(0);  // Get first input by index
bool is_const = tasklet.has_constant_input(0); // Check if input is constant

See also: DataFlowNode for the base class; Tasklet for simple operations; LibraryNode for complex operations; Memlet for edge connections