pyverilog

import os from pyverilog.vparser.parser import VerilogParser import pyverilog.vparser.ast as vast from pyverilog.dataflow.dataflow import DataflowAnalyzer from pyverilog.dataflow.graph import DotGraph # Create a dummy Verilog file for parsing verilog_code = """ module test_module (input clk, input rst, output reg [7:0] count); always @(posedge clk or posedge rst) begin if (rst) begin count <= 8'h00; end else begin count <= count + 1; end end endmodule """ with open('example.v', 'w') as f: f.write(verilog_code) # 1. Parse the Verilog file into an AST parser = VerilogParser() ast = parser.parse(['example.v']) print("--- Verilog AST --- ") # ast.show() # Uncomment to print the full AST # 2. Perform Dataflow Analysis analyzer = DataflowAnalyzer() analyzer.visit(ast) # Get dataflow graph and print some nodes dfg = analyzer.get_dfg() print("\n--- Dataflow Analysis (some nodes) ---") for node_id, node in dfg.items(): if isinstance(node_id, vast.Port) or isinstance(node_id, vast.Reg): print(f"Node: {node_id.name}, Type: {type(node_id).__name__}, Defs: {len(node.definitions)}") # 3. Generate a DOT graph (requires graphviz and dot command) # try: # graph = DotGraph(dfg) # graph.write_dot('dfg.dot') # print("\nDataflow graph written to dfg.dot (requires Graphviz to visualize).") # except Exception as e: # print(f"\nCould not generate DOT graph: {e} (Is Graphviz installed?)") # Clean up the dummy file os.remove('example.v')